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powerpc: Remove core support for 40x
Now that 40x platforms have gone, remove support for 40x in the core of powerpc arch. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240628121201.130802-4-mpe@ellerman.id.au
This commit is contained in:
Christophe Leroy
Michael Ellerman
parent
e939da89d0
commit
732b32daef
@ -353,7 +353,6 @@ static inline void cpu_feature_keys_init(void) { }
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CPU_FTR_COMMON | CPU_FTR_FPU_UNAVAILABLE | CPU_FTR_NOEXECUTE)
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#define CPU_FTRS_CLASSIC32 (CPU_FTR_COMMON)
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#define CPU_FTRS_8XX (CPU_FTR_NOEXECUTE)
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#define CPU_FTRS_40X (CPU_FTR_NOEXECUTE)
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#define CPU_FTRS_44X (CPU_FTR_NOEXECUTE)
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#define CPU_FTRS_440x6 (CPU_FTR_NOEXECUTE | \
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CPU_FTR_INDEXED_DCR)
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@ -507,9 +506,6 @@ enum {
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#ifdef CONFIG_PPC_8xx
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CPU_FTRS_8XX |
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#endif
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#ifdef CONFIG_40x
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CPU_FTRS_40X |
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#endif
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#ifdef CONFIG_PPC_47x
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CPU_FTRS_47X | CPU_FTR_476_DD2 |
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#elif defined(CONFIG_44x)
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@ -582,9 +578,6 @@ enum {
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#ifdef CONFIG_PPC_8xx
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CPU_FTRS_8XX &
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#endif
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#ifdef CONFIG_40x
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CPU_FTRS_40X &
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#endif
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#ifdef CONFIG_PPC_47x
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CPU_FTRS_47X &
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#elif defined(CONFIG_44x)
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@ -16,7 +16,6 @@
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*/
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#define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001)
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#define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002)
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#define MMU_FTR_TYPE_40x ASM_CONST(0x00000004)
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#define MMU_FTR_TYPE_44x ASM_CONST(0x00000008)
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#define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010)
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#define MMU_FTR_TYPE_47x ASM_CONST(0x00000020)
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@ -153,9 +152,6 @@ enum {
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#ifdef CONFIG_PPC_8xx
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MMU_FTR_TYPE_8xx |
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#endif
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#ifdef CONFIG_40x
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MMU_FTR_TYPE_40x |
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#endif
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#ifdef CONFIG_PPC_47x
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MMU_FTR_TYPE_47x | MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_LOCK_BCAST_INVAL |
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#elif defined(CONFIG_44x)
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@ -202,9 +198,6 @@ enum {
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#ifdef CONFIG_PPC_8xx
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#define MMU_FTRS_ALWAYS MMU_FTR_TYPE_8xx
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#endif
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#ifdef CONFIG_40x
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#define MMU_FTRS_ALWAYS MMU_FTR_TYPE_40x
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#endif
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#ifdef CONFIG_PPC_47x
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#define MMU_FTRS_ALWAYS MMU_FTR_TYPE_47x
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#elif defined(CONFIG_44x)
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@ -1,68 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_MMU_40X_H_
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#define _ASM_POWERPC_MMU_40X_H_
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/*
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* PPC40x support
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*/
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#define PPC40X_TLB_SIZE 64
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/*
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* TLB entries are defined by a "high" tag portion and a "low" data
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* portion. On all architectures, the data portion is 32-bits.
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*
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* TLB entries are managed entirely under software control by reading,
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* writing, and searchoing using the 4xx-specific tlbre, tlbwr, and tlbsx
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* instructions.
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*/
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#define TLB_LO 1
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#define TLB_HI 0
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#define TLB_DATA TLB_LO
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#define TLB_TAG TLB_HI
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/* Tag portion */
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#define TLB_EPN_MASK 0xFFFFFC00 /* Effective Page Number */
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#define TLB_PAGESZ_MASK 0x00000380
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#define TLB_PAGESZ(x) (((x) & 0x7) << 7)
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#define PAGESZ_1K 0
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#define PAGESZ_4K 1
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#define PAGESZ_16K 2
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#define PAGESZ_64K 3
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#define PAGESZ_256K 4
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#define PAGESZ_1M 5
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#define PAGESZ_4M 6
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#define PAGESZ_16M 7
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#define TLB_VALID 0x00000040 /* Entry is valid */
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/* Data portion */
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#define TLB_RPN_MASK 0xFFFFFC00 /* Real Page Number */
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#define TLB_PERM_MASK 0x00000300
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#define TLB_EX 0x00000200 /* Instruction execution allowed */
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#define TLB_WR 0x00000100 /* Writes permitted */
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#define TLB_ZSEL_MASK 0x000000F0
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#define TLB_ZSEL(x) (((x) & 0xF) << 4)
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#define TLB_ATTR_MASK 0x0000000F
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#define TLB_W 0x00000008 /* Caching is write-through */
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#define TLB_I 0x00000004 /* Caching is inhibited */
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#define TLB_M 0x00000002 /* Memory is coherent */
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#define TLB_G 0x00000001 /* Memory is guarded from prefetch */
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#ifndef __ASSEMBLY__
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typedef struct {
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unsigned int id;
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unsigned int active;
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void __user *vdso;
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} mm_context_t;
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#endif /* !__ASSEMBLY__ */
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#define mmu_virtual_psize MMU_PAGE_4K
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#define mmu_linear_psize MMU_PAGE_256M
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#endif /* _ASM_POWERPC_MMU_40X_H_ */
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@ -118,9 +118,7 @@
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* (hardware-defined) PowerPC PTE as closely as possible.
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*/
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#if defined(CONFIG_40x)
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#include <asm/nohash/32/pte-40x.h>
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#elif defined(CONFIG_44x)
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#if defined(CONFIG_44x)
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#include <asm/nohash/32/pte-44x.h>
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#elif defined(CONFIG_PPC_85xx) && defined(CONFIG_PTE_64BIT)
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#include <asm/nohash/pte-e500.h>
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@ -1,73 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_NOHASH_32_PTE_40x_H
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#define _ASM_POWERPC_NOHASH_32_PTE_40x_H
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#ifdef __KERNEL__
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/*
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* At present, all PowerPC 400-class processors share a similar TLB
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* architecture. The instruction and data sides share a unified,
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* 64-entry, fully-associative TLB which is maintained totally under
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* software control. In addition, the instruction side has a
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* hardware-managed, 4-entry, fully-associative TLB which serves as a
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* first level to the shared TLB. These two TLBs are known as the UTLB
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* and ITLB, respectively (see "mmu.h" for definitions).
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*
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* There are several potential gotchas here. The 40x hardware TLBLO
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* field looks like this:
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*
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* 0 1 2 3 4 ... 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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* RPN..................... 0 0 EX WR ZSEL....... W I M G
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*
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* Where possible we make the Linux PTE bits match up with this
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*
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* - bits 20 and 21 must be cleared, because we use 4k pages (40x can
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* support down to 1k pages), this is done in the TLBMiss exception
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* handler.
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* - We use only zones 0 (for kernel pages) and 1 (for user pages)
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* of the 16 available. Bit 24-26 of the TLB are cleared in the TLB
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* miss handler. Bit 27 is PAGE_USER, thus selecting the correct
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* zone.
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* - PRESENT *must* be in the bottom two bits because swap PTEs
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* use the top 30 bits. Because 40x doesn't support SMP anyway, M is
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* irrelevant so we borrow it for PAGE_PRESENT. Bit 30
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* is cleared in the TLB miss handler before the TLB entry is loaded.
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* - All other bits of the PTE are loaded into TLBLO without
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* modification, leaving us only the bits 20, 21, 24, 25, 26, 30 for
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* software PTE bits. We actually use bits 21, 24, 25, and
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* 30 respectively for the software bits: ACCESSED, DIRTY, RW, and
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* PRESENT.
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*/
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#define _PAGE_GUARDED 0x001 /* G: page is guarded from prefetch */
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#define _PAGE_PRESENT 0x002 /* software: PTE contains a translation */
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#define _PAGE_NO_CACHE 0x004 /* I: caching is inhibited */
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#define _PAGE_WRITETHRU 0x008 /* W: caching is write-through */
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#define _PAGE_READ 0x010 /* software: read permission */
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#define _PAGE_SPECIAL 0x020 /* software: Special page */
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#define _PAGE_DIRTY 0x080 /* software: dirty page */
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#define _PAGE_WRITE 0x100 /* hardware: WR, anded with dirty in exception */
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#define _PAGE_EXEC 0x200 /* hardware: EX permission */
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#define _PAGE_ACCESSED 0x400 /* software: R: page referenced */
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/* No page size encoding in the linux PTE */
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#define _PAGE_PSIZE 0
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/* cache related flags non existing on 40x */
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#define _PAGE_COHERENT 0
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#define _PMD_PRESENT 0x400 /* PMD points to page of PTEs */
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#define _PMD_PRESENT_MASK _PMD_PRESENT
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#define _PMD_BAD 0x802
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#define _PMD_SIZE_4M 0x0c0
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#define _PMD_SIZE_16M 0x0e0
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#define _PMD_USER 0
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#define _PTE_NONE_MASK 0
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#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED)
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#define _PAGE_BASE (_PAGE_BASE_NC)
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#include <asm/pgtable-masks.h>
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_NOHASH_32_PTE_40x_H */
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@ -2,10 +2,7 @@
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#ifndef _ASM_POWERPC_NOHASH_MMU_H_
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#define _ASM_POWERPC_NOHASH_MMU_H_
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#if defined(CONFIG_40x)
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/* 40x-style software loaded TLB */
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#include <asm/nohash/32/mmu-40x.h>
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#elif defined(CONFIG_44x)
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#if defined(CONFIG_44x)
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/* 44x-style software loaded TLB */
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#include <asm/nohash/32/mmu-44x.h>
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#elif defined(CONFIG_PPC_E500)
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@ -233,14 +233,10 @@
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/* Special Purpose Registers (SPRNs)*/
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#ifdef CONFIG_40x
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#define SPRN_PID 0x3B1 /* Process ID */
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#else
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#define SPRN_PID 0x030 /* Process ID */
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#ifdef CONFIG_BOOKE
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#define SPRN_PID0 SPRN_PID/* Process ID Register 0 */
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#endif
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#endif
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#define SPRN_CTR 0x009 /* Count Register */
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#define SPRN_DSCR 0x11
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@ -527,7 +523,7 @@
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#define SPRN_TSCR 0x399 /* Thread Switch Control Register */
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#define SPRN_DEC 0x016 /* Decrement Register */
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#define SPRN_PIT 0x3DB /* Programmable Interval Timer (40x/BOOKE) */
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#define SPRN_PIT 0x3DB /* Programmable Interval Timer (BOOKE) */
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#define SPRN_DER 0x095 /* Debug Enable Register */
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#define DER_RSTE 0x40000000 /* Reset Interrupt */
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@ -1116,15 +1112,6 @@
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* - SPRG2 indicator that we are in RTAS
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* - SPRG4 (603 only) pseudo TLB LRU data
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*
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* 32-bit 40x:
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* - SPRG0 scratch for exception vectors
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* - SPRG1 scratch for exception vectors
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* - SPRG2 scratch for exception vectors
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* - SPRG4 scratch for exception vectors (not 403)
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* - SPRG5 scratch for exception vectors (not 403)
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* - SPRG6 scratch for exception vectors (not 403)
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* - SPRG7 scratch for exception vectors (not 403)
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*
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* 32-bit 440 and FSL BookE:
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* - SPRG0 scratch for exception vectors
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* - SPRG1 scratch for exception vectors (*)
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@ -1216,16 +1203,6 @@
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#define SPRN_SPRG_603_LRU SPRN_SPRG4
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#endif
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#ifdef CONFIG_40x
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#define SPRN_SPRG_SCRATCH0 SPRN_SPRG0
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#define SPRN_SPRG_SCRATCH1 SPRN_SPRG1
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#define SPRN_SPRG_SCRATCH2 SPRN_SPRG2
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#define SPRN_SPRG_SCRATCH3 SPRN_SPRG4
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#define SPRN_SPRG_SCRATCH4 SPRN_SPRG5
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#define SPRN_SPRG_SCRATCH5 SPRN_SPRG6
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#define SPRN_SPRG_SCRATCH6 SPRN_SPRG7
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#endif
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#ifdef CONFIG_BOOKE
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#define SPRN_SPRG_RSCRATCH0 SPRN_SPRG0
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#define SPRN_SPRG_WSCRATCH0 SPRN_SPRG0
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@ -1,10 +1,7 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Contains register definitions common to the Book E PowerPC
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* specification. Notice that while the IBM-40x series of CPUs
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* are not true Book E PowerPCs, they borrowed a number of features
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* before Book E was finalized, and are included here as well. Unfortunately,
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* they sometimes used different locations than true Book E CPUs did.
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* specification.
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*
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* Copyright 2009-2010 Freescale Semiconductor, Inc.
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*/
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@ -42,9 +39,6 @@
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#define MSR_KERNEL (MSR_ | MSR_64BIT)
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#define MSR_USER32 (MSR_ | MSR_PR | MSR_EE)
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#define MSR_USER64 (MSR_USER32 | MSR_64BIT)
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#elif defined (CONFIG_40x)
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#define MSR_KERNEL (MSR_ME|MSR_RI|MSR_IR|MSR_DR|MSR_CE)
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#define MSR_USER (MSR_KERNEL|MSR_PR|MSR_EE)
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#else
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#define MSR_KERNEL (MSR_ME|MSR_RI|MSR_CE)
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#define MSR_USER (MSR_KERNEL|MSR_PR|MSR_EE)
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@ -157,7 +151,6 @@
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#define SPRN_TLB3CFG 0x2B3 /* TLB 3 Config Register */
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#define SPRN_EPR 0x2BE /* External Proxy Register */
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#define SPRN_CCR1 0x378 /* Core Configuration Register 1 */
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#define SPRN_ZPR 0x3B0 /* Zone Protection Register (40x) */
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#define SPRN_MAS7 0x3B0 /* MMU Assist Register 7 */
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#define SPRN_MMUCR 0x3B2 /* MMU Control Register */
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#define SPRN_CCR0 0x3B3 /* Core Configuration Register 0 */
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@ -166,7 +159,6 @@
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#define SPRN_SGR 0x3B9 /* Storage Guarded Register */
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#define SPRN_DCWR 0x3BA /* Data Cache Write-thru Register */
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#define SPRN_SLER 0x3BB /* Little-endian real mode */
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#define SPRN_SU0R 0x3BC /* "User 0" real mode (40x) */
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#define SPRN_DCMP 0x3D1 /* Data TLB Compare Register */
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#define SPRN_ICDBDR 0x3D3 /* Instruction Cache Debug Data Register */
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#define SPRN_EVPR 0x3D6 /* Exception Vector Prefix Register */
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@ -183,10 +175,8 @@
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#define SPRN_SVR 0x3FF /* System Version Register */
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/*
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* SPRs which have conflicting definitions on true Book E versus classic,
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* or IBM 40x.
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* SPRs which have conflicting definitions on true Book E versus classic.
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*/
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#ifdef CONFIG_BOOKE
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#define SPRN_CSRR0 0x03A /* Critical Save and Restore Register 0 */
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#define SPRN_CSRR1 0x03B /* Critical Save and Restore Register 1 */
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#define SPRN_DEAR 0x03D /* Data Error Address Register */
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@ -201,22 +191,6 @@
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#define SPRN_DAC2 0x13D /* Data Address Compare 2 */
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#define SPRN_TSR 0x150 /* Timer Status Register */
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#define SPRN_TCR 0x154 /* Timer Control Register */
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#endif /* Book E */
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#ifdef CONFIG_40x
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#define SPRN_DBCR1 0x3BD /* Debug Control Register 1 */
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#define SPRN_ESR 0x3D4 /* Exception Syndrome Register */
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#define SPRN_DEAR 0x3D5 /* Data Error Address Register */
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#define SPRN_TSR 0x3D8 /* Timer Status Register */
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#define SPRN_TCR 0x3DA /* Timer Control Register */
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#define SPRN_SRR2 0x3DE /* Save/Restore Register 2 */
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#define SPRN_SRR3 0x3DF /* Save/Restore Register 3 */
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#define SPRN_DBSR 0x3F0 /* Debug Status Register */
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#define SPRN_DBCR0 0x3F2 /* Debug Control Register 0 */
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#define SPRN_DAC1 0x3F6 /* Data Address Compare 1 */
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#define SPRN_DAC2 0x3F7 /* Data Address Compare 2 */
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#define SPRN_CSRR0 SPRN_SRR2 /* Critical Save and Restore Register 0 */
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#define SPRN_CSRR1 SPRN_SRR3 /* Critical Save and Restore Register 1 */
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#endif
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#define SPRN_HACOP 0x15F /* Hypervisor Available Coprocessor Register */
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/* Bit definitions for CCR1. */
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@ -296,10 +270,6 @@
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#endif
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/* Bit definitions for the DBSR. */
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/*
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* DBSR bits which have conflicting definitions on true Book E versus IBM 40x.
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*/
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#ifdef CONFIG_BOOKE
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#define DBSR_IDE 0x80000000 /* Imprecise Debug Event */
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#define DBSR_MRR 0x30000000 /* Most Recent Reset */
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#define DBSR_IC 0x08000000 /* Instruction Completion */
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@ -319,21 +289,6 @@
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#define DBSR_CRET 0x00000020 /* Critical Return Debug Event */
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#define DBSR_IAC12ATS 0x00000002 /* Instr Address Compare 1/2 Toggle */
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#define DBSR_IAC34ATS 0x00000001 /* Instr Address Compare 3/4 Toggle */
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#endif
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#ifdef CONFIG_40x
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#define DBSR_IC 0x80000000 /* Instruction Completion */
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#define DBSR_BT 0x40000000 /* Branch taken */
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#define DBSR_IRPT 0x20000000 /* Exception Debug Event */
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#define DBSR_TIE 0x10000000 /* Trap Instruction debug Event */
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#define DBSR_IAC1 0x04000000 /* Instruction Address Compare 1 Event */
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#define DBSR_IAC2 0x02000000 /* Instruction Address Compare 2 Event */
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#define DBSR_IAC3 0x00080000 /* Instruction Address Compare 3 Event */
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#define DBSR_IAC4 0x00040000 /* Instruction Address Compare 4 Event */
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#define DBSR_DAC1R 0x01000000 /* Data Address Compare 1 Read Event */
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#define DBSR_DAC1W 0x00800000 /* Data Address Compare 1 Write Event */
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#define DBSR_DAC2R 0x00400000 /* Data Address Compare 2 Read Event */
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#define DBSR_DAC2W 0x00200000 /* Data Address Compare 2 Write Event */
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#endif
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||||
/* Bit definitions related to the ESR. */
|
||||
#define ESR_MCI 0x80000000 /* Machine Check - Instruction */
|
||||
@ -355,69 +310,6 @@
|
||||
#define ESR_SPV 0x00000080 /* Signal Processing operation */
|
||||
|
||||
/* Bit definitions related to the DBCR0. */
|
||||
#if defined(CONFIG_40x)
|
||||
#define DBCR0_EDM 0x80000000 /* External Debug Mode */
|
||||
#define DBCR0_IDM 0x40000000 /* Internal Debug Mode */
|
||||
#define DBCR0_RST 0x30000000 /* all the bits in the RST field */
|
||||
#define DBCR0_RST_SYSTEM 0x30000000 /* System Reset */
|
||||
#define DBCR0_RST_CHIP 0x20000000 /* Chip Reset */
|
||||
#define DBCR0_RST_CORE 0x10000000 /* Core Reset */
|
||||
#define DBCR0_RST_NONE 0x00000000 /* No Reset */
|
||||
#define DBCR0_IC 0x08000000 /* Instruction Completion */
|
||||
#define DBCR0_ICMP DBCR0_IC
|
||||
#define DBCR0_BT 0x04000000 /* Branch Taken */
|
||||
#define DBCR0_BRT DBCR0_BT
|
||||
#define DBCR0_EDE 0x02000000 /* Exception Debug Event */
|
||||
#define DBCR0_IRPT DBCR0_EDE
|
||||
#define DBCR0_TDE 0x01000000 /* TRAP Debug Event */
|
||||
#define DBCR0_IA1 0x00800000 /* Instr Addr compare 1 enable */
|
||||
#define DBCR0_IAC1 DBCR0_IA1
|
||||
#define DBCR0_IA2 0x00400000 /* Instr Addr compare 2 enable */
|
||||
#define DBCR0_IAC2 DBCR0_IA2
|
||||
#define DBCR0_IA12 0x00200000 /* Instr Addr 1-2 range enable */
|
||||
#define DBCR0_IA12X 0x00100000 /* Instr Addr 1-2 range eXclusive */
|
||||
#define DBCR0_IA3 0x00080000 /* Instr Addr compare 3 enable */
|
||||
#define DBCR0_IAC3 DBCR0_IA3
|
||||
#define DBCR0_IA4 0x00040000 /* Instr Addr compare 4 enable */
|
||||
#define DBCR0_IAC4 DBCR0_IA4
|
||||
#define DBCR0_IA34 0x00020000 /* Instr Addr 3-4 range Enable */
|
||||
#define DBCR0_IA34X 0x00010000 /* Instr Addr 3-4 range eXclusive */
|
||||
#define DBCR0_IA12T 0x00008000 /* Instr Addr 1-2 range Toggle */
|
||||
#define DBCR0_IA34T 0x00004000 /* Instr Addr 3-4 range Toggle */
|
||||
#define DBCR0_FT 0x00000001 /* Freeze Timers on debug event */
|
||||
|
||||
#define dbcr_iac_range(task) ((task)->thread.debug.dbcr0)
|
||||
#define DBCR_IAC12I DBCR0_IA12 /* Range Inclusive */
|
||||
#define DBCR_IAC12X (DBCR0_IA12 | DBCR0_IA12X) /* Range Exclusive */
|
||||
#define DBCR_IAC12MODE (DBCR0_IA12 | DBCR0_IA12X) /* IAC 1-2 Mode Bits */
|
||||
#define DBCR_IAC34I DBCR0_IA34 /* Range Inclusive */
|
||||
#define DBCR_IAC34X (DBCR0_IA34 | DBCR0_IA34X) /* Range Exclusive */
|
||||
#define DBCR_IAC34MODE (DBCR0_IA34 | DBCR0_IA34X) /* IAC 3-4 Mode Bits */
|
||||
|
||||
/* Bit definitions related to the DBCR1. */
|
||||
#define DBCR1_DAC1R 0x80000000 /* DAC1 Read Debug Event */
|
||||
#define DBCR1_DAC2R 0x40000000 /* DAC2 Read Debug Event */
|
||||
#define DBCR1_DAC1W 0x20000000 /* DAC1 Write Debug Event */
|
||||
#define DBCR1_DAC2W 0x10000000 /* DAC2 Write Debug Event */
|
||||
|
||||
#define dbcr_dac(task) ((task)->thread.debug.dbcr1)
|
||||
#define DBCR_DAC1R DBCR1_DAC1R
|
||||
#define DBCR_DAC1W DBCR1_DAC1W
|
||||
#define DBCR_DAC2R DBCR1_DAC2R
|
||||
#define DBCR_DAC2W DBCR1_DAC2W
|
||||
|
||||
/*
|
||||
* Are there any active Debug Events represented in the
|
||||
* Debug Control Registers?
|
||||
*/
|
||||
#define DBCR0_ACTIVE_EVENTS (DBCR0_ICMP | DBCR0_IAC1 | DBCR0_IAC2 | \
|
||||
DBCR0_IAC3 | DBCR0_IAC4)
|
||||
#define DBCR1_ACTIVE_EVENTS (DBCR1_DAC1R | DBCR1_DAC2R | \
|
||||
DBCR1_DAC1W | DBCR1_DAC2W)
|
||||
#define DBCR_ACTIVE_EVENTS(dbcr0, dbcr1) (((dbcr0) & DBCR0_ACTIVE_EVENTS) || \
|
||||
((dbcr1) & DBCR1_ACTIVE_EVENTS))
|
||||
|
||||
#elif defined(CONFIG_BOOKE)
|
||||
#define DBCR0_EDM 0x80000000 /* External Debug Mode */
|
||||
#define DBCR0_IDM 0x40000000 /* Internal Debug Mode */
|
||||
#define DBCR0_RST 0x30000000 /* all the bits in the RST field */
|
||||
@ -518,7 +410,6 @@
|
||||
|
||||
#define DBCR_ACTIVE_EVENTS(dbcr0, dbcr1) (((dbcr0) & DBCR0_ACTIVE_EVENTS) || \
|
||||
((dbcr1) & DBCR1_ACTIVE_EVENTS))
|
||||
#endif /* #elif defined(CONFIG_BOOKE) */
|
||||
|
||||
/* Bit definitions related to the TCR. */
|
||||
#define TCR_WP(x) (((x)&0x3)<<30) /* WDT Period */
|
||||
|
||||
@ -58,9 +58,6 @@ static inline u64 get_vtb(void)
|
||||
*/
|
||||
static inline u64 get_dec(void)
|
||||
{
|
||||
if (IS_ENABLED(CONFIG_40x))
|
||||
return mfspr(SPRN_PIT);
|
||||
|
||||
return mfspr(SPRN_DEC);
|
||||
}
|
||||
|
||||
@ -71,9 +68,7 @@ static inline u64 get_dec(void)
|
||||
*/
|
||||
static inline void set_dec(u64 val)
|
||||
{
|
||||
if (IS_ENABLED(CONFIG_40x))
|
||||
mtspr(SPRN_PIT, (u32)val);
|
||||
else if (IS_ENABLED(CONFIG_BOOKE))
|
||||
if (IS_ENABLED(CONFIG_BOOKE))
|
||||
mtspr(SPRN_DEC, val);
|
||||
else
|
||||
mtspr(SPRN_DEC, val - 1);
|
||||
|
||||
@ -44,7 +44,6 @@ void __init udbg_init_rtas_panel(void);
|
||||
void __init udbg_init_rtas_console(void);
|
||||
void __init udbg_init_btext(void);
|
||||
void __init udbg_init_44x_as1(void);
|
||||
void __init udbg_init_40x_realmode(void);
|
||||
void __init udbg_init_cpm(void);
|
||||
void __init udbg_init_usbgecko(void);
|
||||
void __init udbg_init_memcons(void);
|
||||
|
||||
@ -123,7 +123,6 @@ obj-$(CONFIG_JUMP_LABEL) += jump_label.o
|
||||
|
||||
obj-$(CONFIG_PPC64) += head_64.o
|
||||
obj-$(CONFIG_PPC_BOOK3S_32) += head_book3s_32.o
|
||||
obj-$(CONFIG_40x) += head_40x.o
|
||||
obj-$(CONFIG_44x) += head_44x.o
|
||||
obj-$(CONFIG_PPC_8xx) += head_8xx.o
|
||||
obj-$(CONFIG_PPC_85xx) += head_85xx.o
|
||||
|
||||
@ -1,9 +1,5 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
|
||||
#ifdef CONFIG_40x
|
||||
#include "cpu_specs_40x.h"
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_PPC_47x
|
||||
#include "cpu_specs_47x.h"
|
||||
#elif defined(CONFIG_44x)
|
||||
|
||||
@ -1,280 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
/*
|
||||
* Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
|
||||
*/
|
||||
|
||||
static struct cpu_spec cpu_specs[] __initdata = {
|
||||
{ /* STB 04xxx */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x41810000,
|
||||
.cpu_name = "STB04xxx",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* NP405L */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x41610000,
|
||||
.cpu_name = "NP405L",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* NP4GS3 */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x40B10000,
|
||||
.cpu_name = "NP4GS3",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* NP405H */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x41410000,
|
||||
.cpu_name = "NP405H",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405GPr */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x50910000,
|
||||
.cpu_name = "405GPr",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* STBx25xx */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x51510000,
|
||||
.cpu_name = "STBx25xx",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405LP */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x41F10000,
|
||||
.cpu_name = "405LP",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EP */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x51210000,
|
||||
.cpu_name = "405EP",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EX Rev. A/B with Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910007,
|
||||
.cpu_name = "405EX Rev. A/B",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EX Rev. C without Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x1291000d,
|
||||
.cpu_name = "405EX Rev. C",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EX Rev. C with Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x1291000f,
|
||||
.cpu_name = "405EX Rev. C",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EX Rev. D without Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910003,
|
||||
.cpu_name = "405EX Rev. D",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EX Rev. D with Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910005,
|
||||
.cpu_name = "405EX Rev. D",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EXr Rev. A/B without Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910001,
|
||||
.cpu_name = "405EXr Rev. A/B",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EXr Rev. C without Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910009,
|
||||
.cpu_name = "405EXr Rev. C",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EXr Rev. C with Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x1291000b,
|
||||
.cpu_name = "405EXr Rev. C",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EXr Rev. D without Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910000,
|
||||
.cpu_name = "405EXr Rev. D",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* 405EXr Rev. D with Security */
|
||||
.pvr_mask = 0xffff000f,
|
||||
.pvr_value = 0x12910002,
|
||||
.cpu_name = "405EXr Rev. D",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{
|
||||
/* 405EZ */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x41510000,
|
||||
.cpu_name = "405EZ",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* APM8018X */
|
||||
.pvr_mask = 0xffff0000,
|
||||
.pvr_value = 0x7ff11432,
|
||||
.cpu_name = "APM8018X",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
},
|
||||
{ /* default match */
|
||||
.pvr_mask = 0x00000000,
|
||||
.pvr_value = 0x00000000,
|
||||
.cpu_name = "(generic 40x PPC)",
|
||||
.cpu_features = CPU_FTRS_40X,
|
||||
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU |
|
||||
PPC_FEATURE_HAS_4xxMAC,
|
||||
.mmu_features = MMU_FTR_TYPE_40x,
|
||||
.icache_bsize = 32,
|
||||
.dcache_bsize = 32,
|
||||
.machine_check = machine_check_4xx,
|
||||
.platform = "ppc405",
|
||||
}
|
||||
};
|
||||
@ -158,9 +158,6 @@ syscall_exit_finish:
|
||||
1: REST_GPR(2, r1)
|
||||
REST_GPR(1, r1)
|
||||
rfi
|
||||
#ifdef CONFIG_40x
|
||||
b . /* Prevent prefetch past rfi */
|
||||
#endif
|
||||
|
||||
3: mtcr r5
|
||||
lwz r4,_CTR(r1)
|
||||
@ -237,9 +234,6 @@ fast_exception_return:
|
||||
REST_GPR(12, r11)
|
||||
REST_GPR(11, r11)
|
||||
rfi
|
||||
#ifdef CONFIG_40x
|
||||
b . /* Prevent prefetch past rfi */
|
||||
#endif
|
||||
_ASM_NOKPROBE_SYMBOL(fast_exception_return)
|
||||
|
||||
/* aargh, a nonrecoverable interrupt, panic */
|
||||
@ -296,9 +290,6 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
|
||||
REST_GPR(0, r1)
|
||||
REST_GPR(1, r1)
|
||||
rfi
|
||||
#ifdef CONFIG_40x
|
||||
b . /* Prevent prefetch past rfi */
|
||||
#endif
|
||||
|
||||
.Lrestore_nvgprs:
|
||||
REST_NVGPRS(r1)
|
||||
@ -346,9 +337,6 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
|
||||
REST_GPR(0, r1)
|
||||
REST_GPR(1, r1)
|
||||
rfi
|
||||
#ifdef CONFIG_40x
|
||||
b . /* Prevent prefetch past rfi */
|
||||
#endif
|
||||
|
||||
1: /*
|
||||
* Emulate stack store with update. New r1 value was already calculated
|
||||
@ -375,9 +363,6 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
|
||||
mfspr r9, SPRN_SPRG_SCRATCH0
|
||||
#endif
|
||||
rfi
|
||||
#ifdef CONFIG_40x
|
||||
b . /* Prevent prefetch past rfi */
|
||||
#endif
|
||||
_ASM_NOKPROBE_SYMBOL(interrupt_return)
|
||||
|
||||
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
|
||||
@ -395,17 +380,6 @@ _ASM_NOKPROBE_SYMBOL(interrupt_return)
|
||||
* time of the critical interrupt.
|
||||
*
|
||||
*/
|
||||
#ifdef CONFIG_40x
|
||||
#define PPC_40x_TURN_OFF_MSR_DR \
|
||||
/* avoid any possible TLB misses here by turning off MSR.DR, we \
|
||||
* assume the instructions here are mapped by a pinned TLB entry */ \
|
||||
li r10,MSR_IR; \
|
||||
mtmsr r10; \
|
||||
isync; \
|
||||
tophys(r1, r1);
|
||||
#else
|
||||
#define PPC_40x_TURN_OFF_MSR_DR
|
||||
#endif
|
||||
|
||||
#define RET_FROM_EXC_LEVEL(exc_lvl_srr0, exc_lvl_srr1, exc_lvl_rfi) \
|
||||
REST_NVGPRS(r1); \
|
||||
@ -423,7 +397,6 @@ _ASM_NOKPROBE_SYMBOL(interrupt_return)
|
||||
mtlr r11; \
|
||||
lwz r10,_CCR(r1); \
|
||||
mtcrf 0xff,r10; \
|
||||
PPC_40x_TURN_OFF_MSR_DR; \
|
||||
lwz r9,_DEAR(r1); \
|
||||
lwz r10,_ESR(r1); \
|
||||
mtspr SPRN_DEAR,r9; \
|
||||
@ -471,19 +444,6 @@ _ASM_NOKPROBE_SYMBOL(interrupt_return)
|
||||
#define RESTORE_MMU_REGS
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_40x
|
||||
.globl ret_from_crit_exc
|
||||
ret_from_crit_exc:
|
||||
lis r9,crit_srr0@ha;
|
||||
lwz r9,crit_srr0@l(r9);
|
||||
lis r10,crit_srr1@ha;
|
||||
lwz r10,crit_srr1@l(r10);
|
||||
mtspr SPRN_SRR0,r9;
|
||||
mtspr SPRN_SRR1,r10;
|
||||
RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, PPC_RFCI)
|
||||
_ASM_NOKPROBE_SYMBOL(ret_from_crit_exc)
|
||||
#endif /* CONFIG_40x */
|
||||
|
||||
#ifdef CONFIG_BOOKE
|
||||
.globl ret_from_crit_exc
|
||||
ret_from_crit_exc:
|
||||
|
||||
@ -21,17 +21,9 @@
|
||||
mtspr SPRN_SPRG_SCRATCH1,r11
|
||||
mfspr r10, SPRN_SPRG_THREAD
|
||||
.if \handle_dar_dsisr
|
||||
#ifdef CONFIG_40x
|
||||
mfspr r11, SPRN_DEAR
|
||||
#else
|
||||
mfspr r11, SPRN_DAR
|
||||
#endif
|
||||
stw r11, DAR(r10)
|
||||
#ifdef CONFIG_40x
|
||||
mfspr r11, SPRN_ESR
|
||||
#else
|
||||
mfspr r11, SPRN_DSISR
|
||||
#endif
|
||||
stw r11, DSISR(r10)
|
||||
.endif
|
||||
mfspr r11, SPRN_SRR0
|
||||
@ -96,9 +88,7 @@
|
||||
.endif
|
||||
lwz r9, SRR1(r12)
|
||||
lwz r12, SRR0(r12)
|
||||
#ifdef CONFIG_40x
|
||||
rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
|
||||
#elif defined(CONFIG_PPC_8xx)
|
||||
#ifdef CONFIG_PPC_8xx
|
||||
mtspr SPRN_EID, r2 /* Set MSR_RI */
|
||||
#else
|
||||
li r10, MSR_KERNEL /* can take exceptions */
|
||||
|
||||
@ -1,721 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
/*
|
||||
* Copyright (c) 1995-1996 Gary Thomas <gdt@linuxppc.org>
|
||||
* Initial PowerPC version.
|
||||
* Copyright (c) 1996 Cort Dougan <cort@cs.nmt.edu>
|
||||
* Rewritten for PReP
|
||||
* Copyright (c) 1996 Paul Mackerras <paulus@cs.anu.edu.au>
|
||||
* Low-level exception handers, MMU support, and rewrite.
|
||||
* Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
|
||||
* PowerPC 8xx modifications.
|
||||
* Copyright (c) 1998-1999 TiVo, Inc.
|
||||
* PowerPC 403GCX modifications.
|
||||
* Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu>
|
||||
* PowerPC 403GCX/405GP modifications.
|
||||
* Copyright 2000 MontaVista Software Inc.
|
||||
* PPC405 modifications
|
||||
* PowerPC 403GCX/405GP modifications.
|
||||
* Author: MontaVista Software, Inc.
|
||||
* frank_rowand@mvista.com or source@mvista.com
|
||||
* debbie_chu@mvista.com
|
||||
*
|
||||
* Module name: head_4xx.S
|
||||
*
|
||||
* Description:
|
||||
* Kernel execution entry point code.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/pgtable.h>
|
||||
#include <linux/sizes.h>
|
||||
#include <linux/linkage.h>
|
||||
|
||||
#include <asm/processor.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/mmu.h>
|
||||
#include <asm/cputable.h>
|
||||
#include <asm/thread_info.h>
|
||||
#include <asm/ppc_asm.h>
|
||||
#include <asm/asm-offsets.h>
|
||||
#include <asm/ptrace.h>
|
||||
|
||||
#include "head_32.h"
|
||||
|
||||
/* As with the other PowerPC ports, it is expected that when code
|
||||
* execution begins here, the following registers contain valid, yet
|
||||
* optional, information:
|
||||
*
|
||||
* r3 - Board info structure pointer (DRAM, frequency, MAC address, etc.)
|
||||
* r4 - Starting address of the init RAM disk
|
||||
* r5 - Ending address of the init RAM disk
|
||||
* r6 - Start of kernel command line string (e.g. "mem=96m")
|
||||
* r7 - End of kernel command line string
|
||||
*
|
||||
* This is all going to change RSN when we add bi_recs....... -- Dan
|
||||
*/
|
||||
__HEAD
|
||||
_GLOBAL(_stext);
|
||||
_GLOBAL(_start);
|
||||
|
||||
mr r31,r3 /* save device tree ptr */
|
||||
|
||||
/* We have to turn on the MMU right away so we get cache modes
|
||||
* set correctly.
|
||||
*/
|
||||
bl initial_mmu
|
||||
|
||||
/* We now have the lower 16 Meg mapped into TLB entries, and the caches
|
||||
* ready to work.
|
||||
*/
|
||||
turn_on_mmu:
|
||||
lis r0,MSR_KERNEL@h
|
||||
ori r0,r0,MSR_KERNEL@l
|
||||
mtspr SPRN_SRR1,r0
|
||||
lis r0,start_here@h
|
||||
ori r0,r0,start_here@l
|
||||
mtspr SPRN_SRR0,r0
|
||||
rfi /* enables MMU */
|
||||
b . /* prevent prefetch past rfi */
|
||||
|
||||
/*
|
||||
* This area is used for temporarily saving registers during the
|
||||
* critical exception prolog.
|
||||
*/
|
||||
. = 0xc0
|
||||
crit_save:
|
||||
_GLOBAL(crit_r10)
|
||||
.space 4
|
||||
_GLOBAL(crit_r11)
|
||||
.space 4
|
||||
_GLOBAL(crit_srr0)
|
||||
.space 4
|
||||
_GLOBAL(crit_srr1)
|
||||
.space 4
|
||||
_GLOBAL(crit_r1)
|
||||
.space 4
|
||||
_GLOBAL(crit_dear)
|
||||
.space 4
|
||||
_GLOBAL(crit_esr)
|
||||
.space 4
|
||||
|
||||
/*
|
||||
* Exception prolog for critical exceptions. This is a little different
|
||||
* from the normal exception prolog above since a critical exception
|
||||
* can potentially occur at any point during normal exception processing.
|
||||
* Thus we cannot use the same SPRG registers as the normal prolog above.
|
||||
* Instead we use a couple of words of memory at low physical addresses.
|
||||
* This is OK since we don't support SMP on these processors.
|
||||
*/
|
||||
.macro CRITICAL_EXCEPTION_PROLOG trapno name
|
||||
stw r10,crit_r10@l(0) /* save two registers to work with */
|
||||
stw r11,crit_r11@l(0)
|
||||
mfspr r10,SPRN_SRR0
|
||||
mfspr r11,SPRN_SRR1
|
||||
stw r10,crit_srr0@l(0)
|
||||
stw r11,crit_srr1@l(0)
|
||||
mfspr r10,SPRN_DEAR
|
||||
mfspr r11,SPRN_ESR
|
||||
stw r10,crit_dear@l(0)
|
||||
stw r11,crit_esr@l(0)
|
||||
mfcr r10 /* save CR in r10 for now */
|
||||
mfspr r11,SPRN_SRR3 /* check whether user or kernel */
|
||||
andi. r11,r11,MSR_PR
|
||||
lis r11,(critirq_ctx-PAGE_OFFSET)@ha
|
||||
lwz r11,(critirq_ctx-PAGE_OFFSET)@l(r11)
|
||||
beq 1f
|
||||
/* COMING FROM USER MODE */
|
||||
mfspr r11,SPRN_SPRG_THREAD /* if from user, start at top of */
|
||||
lwz r11,TASK_STACK-THREAD(r11) /* this thread's kernel stack */
|
||||
1: stw r1,crit_r1@l(0)
|
||||
addi r1,r11,THREAD_SIZE-INT_FRAME_SIZE /* Alloc an excpt frm */
|
||||
LOAD_REG_IMMEDIATE(r11, MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)) /* re-enable MMU */
|
||||
mtspr SPRN_SRR1, r11
|
||||
lis r11, 1f@h
|
||||
ori r11, r11, 1f@l
|
||||
mtspr SPRN_SRR0, r11
|
||||
rfi
|
||||
|
||||
.text
|
||||
1:
|
||||
\name\()_virt:
|
||||
lwz r11,crit_r1@l(0)
|
||||
stw r11,GPR1(r1)
|
||||
stw r11,0(r1)
|
||||
mr r11,r1
|
||||
stw r10,_CCR(r11) /* save various registers */
|
||||
stw r12,GPR12(r11)
|
||||
stw r9,GPR9(r11)
|
||||
mflr r10
|
||||
stw r10,_LINK(r11)
|
||||
lis r9,PAGE_OFFSET@ha
|
||||
lwz r10,crit_r10@l(r9)
|
||||
lwz r12,crit_r11@l(r9)
|
||||
stw r10,GPR10(r11)
|
||||
stw r12,GPR11(r11)
|
||||
lwz r12,crit_dear@l(r9)
|
||||
lwz r9,crit_esr@l(r9)
|
||||
stw r12,_DEAR(r11) /* since they may have had stuff */
|
||||
stw r9,_ESR(r11) /* exception was taken */
|
||||
mfspr r12,SPRN_SRR2
|
||||
mfspr r9,SPRN_SRR3
|
||||
rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
|
||||
COMMON_EXCEPTION_PROLOG_END \trapno + 2
|
||||
_ASM_NOKPROBE_SYMBOL(\name\()_virt)
|
||||
.endm
|
||||
|
||||
/*
|
||||
* State at this point:
|
||||
* r9 saved in stack frame, now saved SRR3 & ~MSR_WE
|
||||
* r10 saved in crit_r10 and in stack frame, trashed
|
||||
* r11 saved in crit_r11 and in stack frame,
|
||||
* now phys stack/exception frame pointer
|
||||
* r12 saved in stack frame, now saved SRR2
|
||||
* CR saved in stack frame, CR0.EQ = !SRR3.PR
|
||||
* LR, DEAR, ESR in stack frame
|
||||
* r1 saved in stack frame, now virt stack/excframe pointer
|
||||
* r0, r3-r8 saved in stack frame
|
||||
*/
|
||||
|
||||
/*
|
||||
* Exception vectors.
|
||||
*/
|
||||
#define CRITICAL_EXCEPTION(n, label, hdlr) \
|
||||
START_EXCEPTION(n, label); \
|
||||
CRITICAL_EXCEPTION_PROLOG n label; \
|
||||
prepare_transfer_to_handler; \
|
||||
bl hdlr; \
|
||||
b ret_from_crit_exc
|
||||
|
||||
/*
|
||||
* 0x0100 - Critical Interrupt Exception
|
||||
*/
|
||||
CRITICAL_EXCEPTION(0x0100, CriticalInterrupt, unknown_exception)
|
||||
|
||||
/*
|
||||
* 0x0200 - Machine Check Exception
|
||||
*/
|
||||
CRITICAL_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
|
||||
|
||||
/*
|
||||
* 0x0300 - Data Storage Exception
|
||||
* This happens for just a few reasons. U0 set (but we don't do that),
|
||||
* or zone protection fault (user violation, write to protected page).
|
||||
* The other Data TLB exceptions bail out to this point
|
||||
* if they can't resolve the lightweight TLB fault.
|
||||
*/
|
||||
START_EXCEPTION(0x0300, DataStorage)
|
||||
EXCEPTION_PROLOG 0x300 DataStorage handle_dar_dsisr=1
|
||||
prepare_transfer_to_handler
|
||||
bl do_page_fault
|
||||
b interrupt_return
|
||||
|
||||
/*
|
||||
* 0x0400 - Instruction Storage Exception
|
||||
* This is caused by a fetch from non-execute or guarded pages.
|
||||
*/
|
||||
START_EXCEPTION(0x0400, InstructionAccess)
|
||||
EXCEPTION_PROLOG 0x400 InstructionAccess
|
||||
li r5,0
|
||||
stw r5, _ESR(r11) /* Zero ESR */
|
||||
stw r12, _DEAR(r11) /* SRR0 as DEAR */
|
||||
prepare_transfer_to_handler
|
||||
bl do_page_fault
|
||||
b interrupt_return
|
||||
|
||||
/* 0x0500 - External Interrupt Exception */
|
||||
EXCEPTION(0x0500, HardwareInterrupt, do_IRQ)
|
||||
|
||||
/* 0x0600 - Alignment Exception */
|
||||
START_EXCEPTION(0x0600, Alignment)
|
||||
EXCEPTION_PROLOG 0x600 Alignment handle_dar_dsisr=1
|
||||
prepare_transfer_to_handler
|
||||
bl alignment_exception
|
||||
REST_NVGPRS(r1)
|
||||
b interrupt_return
|
||||
|
||||
/* 0x0700 - Program Exception */
|
||||
START_EXCEPTION(0x0700, ProgramCheck)
|
||||
EXCEPTION_PROLOG 0x700 ProgramCheck handle_dar_dsisr=1
|
||||
prepare_transfer_to_handler
|
||||
bl program_check_exception
|
||||
REST_NVGPRS(r1)
|
||||
b interrupt_return
|
||||
|
||||
EXCEPTION(0x0800, Trap_08, unknown_exception)
|
||||
EXCEPTION(0x0900, Trap_09, unknown_exception)
|
||||
EXCEPTION(0x0A00, Trap_0A, unknown_exception)
|
||||
EXCEPTION(0x0B00, Trap_0B, unknown_exception)
|
||||
|
||||
/* 0x0C00 - System Call Exception */
|
||||
START_EXCEPTION(0x0C00, SystemCall)
|
||||
SYSCALL_ENTRY 0xc00
|
||||
/* Trap_0D is commented out to get more space for system call exception */
|
||||
|
||||
/* EXCEPTION(0x0D00, Trap_0D, unknown_exception) */
|
||||
EXCEPTION(0x0E00, Trap_0E, unknown_exception)
|
||||
EXCEPTION(0x0F00, Trap_0F, unknown_exception)
|
||||
|
||||
/* 0x1000 - Programmable Interval Timer (PIT) Exception */
|
||||
START_EXCEPTION(0x1000, DecrementerTrap)
|
||||
b Decrementer
|
||||
|
||||
/* 0x1010 - Fixed Interval Timer (FIT) Exception */
|
||||
START_EXCEPTION(0x1010, FITExceptionTrap)
|
||||
b FITException
|
||||
|
||||
/* 0x1020 - Watchdog Timer (WDT) Exception */
|
||||
START_EXCEPTION(0x1020, WDTExceptionTrap)
|
||||
b WDTException
|
||||
|
||||
/* 0x1100 - Data TLB Miss Exception
|
||||
* As the name implies, translation is not in the MMU, so search the
|
||||
* page tables and fix it. The only purpose of this function is to
|
||||
* load TLB entries from the page table if they exist.
|
||||
*/
|
||||
START_EXCEPTION(0x1100, DTLBMiss)
|
||||
mtspr SPRN_SPRG_SCRATCH5, r10 /* Save some working registers */
|
||||
mtspr SPRN_SPRG_SCRATCH6, r11
|
||||
mtspr SPRN_SPRG_SCRATCH3, r12
|
||||
mtspr SPRN_SPRG_SCRATCH4, r9
|
||||
mfcr r12
|
||||
mfspr r9, SPRN_PID
|
||||
rlwimi r12, r9, 0, 0xff
|
||||
mfspr r10, SPRN_DEAR /* Get faulting address */
|
||||
|
||||
/* If we are faulting a kernel address, we have to use the
|
||||
* kernel page tables.
|
||||
*/
|
||||
lis r11, PAGE_OFFSET@h
|
||||
cmplw r10, r11
|
||||
blt+ 3f
|
||||
lis r11, swapper_pg_dir@h
|
||||
ori r11, r11, swapper_pg_dir@l
|
||||
li r9, 0
|
||||
mtspr SPRN_PID, r9 /* TLB will have 0 TID */
|
||||
b 4f
|
||||
|
||||
/* Get the PGD for the current thread.
|
||||
*/
|
||||
3:
|
||||
mfspr r11,SPRN_SPRG_THREAD
|
||||
lwz r11,PGDIR(r11)
|
||||
#ifdef CONFIG_PPC_KUAP
|
||||
rlwinm. r9, r9, 0, 0xff
|
||||
beq 5f /* Kuap fault */
|
||||
#endif
|
||||
4:
|
||||
tophys(r11, r11)
|
||||
rlwimi r11, r10, 12, 20, 29 /* Create L1 (pgdir/pmd) address */
|
||||
lwz r11, 0(r11) /* Get L1 entry */
|
||||
andi. r9, r11, _PMD_PRESENT /* Check if it points to a PTE page */
|
||||
beq 2f /* Bail if no table */
|
||||
|
||||
rlwimi r11, r10, 22, 20, 29 /* Compute PTE address */
|
||||
lwz r11, 0(r11) /* Get Linux PTE */
|
||||
li r9, _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_READ
|
||||
andc. r9, r9, r11 /* Check permission */
|
||||
bne 5f
|
||||
|
||||
rlwinm r9, r11, 1, _PAGE_WRITE /* dirty => w */
|
||||
and r9, r9, r11 /* hwwrite = dirty & w */
|
||||
rlwimi r11, r9, 0, _PAGE_WRITE /* replace w by hwwrite */
|
||||
|
||||
/* Create TLB tag. This is the faulting address plus a static
|
||||
* set of bits. These are size, valid, E, U0.
|
||||
*/
|
||||
li r9, 0x00c0
|
||||
rlwimi r10, r9, 0, 20, 31
|
||||
|
||||
b finish_tlb_load
|
||||
|
||||
2: /* Check for possible large-page pmd entry */
|
||||
rlwinm. r9, r11, 2, 22, 24
|
||||
beq 5f
|
||||
|
||||
/* Create TLB tag. This is the faulting address, plus a static
|
||||
* set of bits (valid, E, U0) plus the size from the PMD.
|
||||
*/
|
||||
ori r9, r9, 0x40
|
||||
rlwimi r10, r9, 0, 20, 31
|
||||
|
||||
b finish_tlb_load
|
||||
|
||||
5:
|
||||
/* The bailout. Restore registers to pre-exception conditions
|
||||
* and call the heavyweights to help us out.
|
||||
*/
|
||||
mtspr SPRN_PID, r12
|
||||
mtcrf 0x80, r12
|
||||
mfspr r9, SPRN_SPRG_SCRATCH4
|
||||
mfspr r12, SPRN_SPRG_SCRATCH3
|
||||
mfspr r11, SPRN_SPRG_SCRATCH6
|
||||
mfspr r10, SPRN_SPRG_SCRATCH5
|
||||
b DataStorage
|
||||
|
||||
/* 0x1200 - Instruction TLB Miss Exception
|
||||
* Nearly the same as above, except we get our information from different
|
||||
* registers and bailout to a different point.
|
||||
*/
|
||||
START_EXCEPTION(0x1200, ITLBMiss)
|
||||
mtspr SPRN_SPRG_SCRATCH5, r10 /* Save some working registers */
|
||||
mtspr SPRN_SPRG_SCRATCH6, r11
|
||||
mtspr SPRN_SPRG_SCRATCH3, r12
|
||||
mtspr SPRN_SPRG_SCRATCH4, r9
|
||||
mfcr r12
|
||||
mfspr r9, SPRN_PID
|
||||
rlwimi r12, r9, 0, 0xff
|
||||
mfspr r10, SPRN_SRR0 /* Get faulting address */
|
||||
|
||||
/* If we are faulting a kernel address, we have to use the
|
||||
* kernel page tables.
|
||||
*/
|
||||
lis r11, PAGE_OFFSET@h
|
||||
cmplw r10, r11
|
||||
blt+ 3f
|
||||
lis r11, swapper_pg_dir@h
|
||||
ori r11, r11, swapper_pg_dir@l
|
||||
li r9, 0
|
||||
mtspr SPRN_PID, r9 /* TLB will have 0 TID */
|
||||
b 4f
|
||||
|
||||
/* Get the PGD for the current thread.
|
||||
*/
|
||||
3:
|
||||
mfspr r11,SPRN_SPRG_THREAD
|
||||
lwz r11,PGDIR(r11)
|
||||
#ifdef CONFIG_PPC_KUAP
|
||||
rlwinm. r9, r9, 0, 0xff
|
||||
beq 5f /* Kuap fault */
|
||||
#endif
|
||||
4:
|
||||
tophys(r11, r11)
|
||||
rlwimi r11, r10, 12, 20, 29 /* Create L1 (pgdir/pmd) address */
|
||||
lwz r11, 0(r11) /* Get L1 entry */
|
||||
andi. r9, r11, _PMD_PRESENT /* Check if it points to a PTE page */
|
||||
beq 2f /* Bail if no table */
|
||||
|
||||
rlwimi r11, r10, 22, 20, 29 /* Compute PTE address */
|
||||
lwz r11, 0(r11) /* Get Linux PTE */
|
||||
li r9, _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC
|
||||
andc. r9, r9, r11 /* Check permission */
|
||||
bne 5f
|
||||
|
||||
rlwinm r9, r11, 1, _PAGE_WRITE /* dirty => w */
|
||||
and r9, r9, r11 /* hwwrite = dirty & w */
|
||||
rlwimi r11, r9, 0, _PAGE_WRITE /* replace w by hwwrite */
|
||||
|
||||
/* Create TLB tag. This is the faulting address plus a static
|
||||
* set of bits. These are size, valid, E, U0.
|
||||
*/
|
||||
li r9, 0x00c0
|
||||
rlwimi r10, r9, 0, 20, 31
|
||||
|
||||
b finish_tlb_load
|
||||
|
||||
2: /* Check for possible large-page pmd entry */
|
||||
rlwinm. r9, r11, 2, 22, 24
|
||||
beq 5f
|
||||
|
||||
/* Create TLB tag. This is the faulting address, plus a static
|
||||
* set of bits (valid, E, U0) plus the size from the PMD.
|
||||
*/
|
||||
ori r9, r9, 0x40
|
||||
rlwimi r10, r9, 0, 20, 31
|
||||
|
||||
b finish_tlb_load
|
||||
|
||||
5:
|
||||
/* The bailout. Restore registers to pre-exception conditions
|
||||
* and call the heavyweights to help us out.
|
||||
*/
|
||||
mtspr SPRN_PID, r12
|
||||
mtcrf 0x80, r12
|
||||
mfspr r9, SPRN_SPRG_SCRATCH4
|
||||
mfspr r12, SPRN_SPRG_SCRATCH3
|
||||
mfspr r11, SPRN_SPRG_SCRATCH6
|
||||
mfspr r10, SPRN_SPRG_SCRATCH5
|
||||
b InstructionAccess
|
||||
|
||||
EXCEPTION(0x1300, Trap_13, unknown_exception)
|
||||
EXCEPTION(0x1400, Trap_14, unknown_exception)
|
||||
EXCEPTION(0x1500, Trap_15, unknown_exception)
|
||||
EXCEPTION(0x1600, Trap_16, unknown_exception)
|
||||
EXCEPTION(0x1700, Trap_17, unknown_exception)
|
||||
EXCEPTION(0x1800, Trap_18, unknown_exception)
|
||||
EXCEPTION(0x1900, Trap_19, unknown_exception)
|
||||
EXCEPTION(0x1A00, Trap_1A, unknown_exception)
|
||||
EXCEPTION(0x1B00, Trap_1B, unknown_exception)
|
||||
EXCEPTION(0x1C00, Trap_1C, unknown_exception)
|
||||
EXCEPTION(0x1D00, Trap_1D, unknown_exception)
|
||||
EXCEPTION(0x1E00, Trap_1E, unknown_exception)
|
||||
EXCEPTION(0x1F00, Trap_1F, unknown_exception)
|
||||
|
||||
/* Check for a single step debug exception while in an exception
|
||||
* handler before state has been saved. This is to catch the case
|
||||
* where an instruction that we are trying to single step causes
|
||||
* an exception (eg ITLB/DTLB miss) and thus the first instruction of
|
||||
* the exception handler generates a single step debug exception.
|
||||
*
|
||||
* If we get a debug trap on the first instruction of an exception handler,
|
||||
* we reset the MSR_DE in the _exception handler's_ MSR (the debug trap is
|
||||
* a critical exception, so we are using SPRN_CSRR1 to manipulate the MSR).
|
||||
* The exception handler was handling a non-critical interrupt, so it will
|
||||
* save (and later restore) the MSR via SPRN_SRR1, which will still have
|
||||
* the MSR_DE bit set.
|
||||
*/
|
||||
/* 0x2000 - Debug Exception */
|
||||
START_EXCEPTION(0x2000, DebugTrap)
|
||||
CRITICAL_EXCEPTION_PROLOG 0x2000 DebugTrap
|
||||
|
||||
/*
|
||||
* If this is a single step or branch-taken exception in an
|
||||
* exception entry sequence, it was probably meant to apply to
|
||||
* the code where the exception occurred (since exception entry
|
||||
* doesn't turn off DE automatically). We simulate the effect
|
||||
* of turning off DE on entry to an exception handler by turning
|
||||
* off DE in the SRR3 value and clearing the debug status.
|
||||
*/
|
||||
mfspr r10,SPRN_DBSR /* check single-step/branch taken */
|
||||
andis. r10,r10,DBSR_IC@h
|
||||
beq+ 2f
|
||||
|
||||
andi. r10,r9,MSR_IR|MSR_PR /* check supervisor + MMU off */
|
||||
beq 1f /* branch and fix it up */
|
||||
|
||||
mfspr r10,SPRN_SRR2 /* Faulting instruction address */
|
||||
cmplwi r10,0x2100
|
||||
bgt+ 2f /* address above exception vectors */
|
||||
|
||||
/* here it looks like we got an inappropriate debug exception. */
|
||||
1: rlwinm r9,r9,0,~MSR_DE /* clear DE in the SRR3 value */
|
||||
lis r10,DBSR_IC@h /* clear the IC event */
|
||||
mtspr SPRN_DBSR,r10
|
||||
/* restore state and get out */
|
||||
lwz r10,_CCR(r11)
|
||||
lwz r0,GPR0(r11)
|
||||
lwz r1,GPR1(r11)
|
||||
mtcrf 0x80,r10
|
||||
mtspr SPRN_SRR2,r12
|
||||
mtspr SPRN_SRR3,r9
|
||||
lwz r9,GPR9(r11)
|
||||
lwz r12,GPR12(r11)
|
||||
lwz r10,crit_r10@l(0)
|
||||
lwz r11,crit_r11@l(0)
|
||||
rfci
|
||||
b .
|
||||
|
||||
/* continue normal handling for a critical exception... */
|
||||
2: mfspr r4,SPRN_DBSR
|
||||
stw r4,_ESR(r11) /* DebugException takes DBSR in _ESR */
|
||||
prepare_transfer_to_handler
|
||||
bl DebugException
|
||||
b ret_from_crit_exc
|
||||
|
||||
/* Programmable Interval Timer (PIT) Exception. (from 0x1000) */
|
||||
__HEAD
|
||||
Decrementer:
|
||||
EXCEPTION_PROLOG 0x1000 Decrementer
|
||||
lis r0,TSR_PIS@h
|
||||
mtspr SPRN_TSR,r0 /* Clear the PIT exception */
|
||||
prepare_transfer_to_handler
|
||||
bl timer_interrupt
|
||||
b interrupt_return
|
||||
|
||||
/* Fixed Interval Timer (FIT) Exception. (from 0x1010) */
|
||||
__HEAD
|
||||
FITException:
|
||||
EXCEPTION_PROLOG 0x1010 FITException
|
||||
prepare_transfer_to_handler
|
||||
bl unknown_exception
|
||||
b interrupt_return
|
||||
|
||||
/* Watchdog Timer (WDT) Exception. (from 0x1020) */
|
||||
__HEAD
|
||||
WDTException:
|
||||
CRITICAL_EXCEPTION_PROLOG 0x1020 WDTException
|
||||
prepare_transfer_to_handler
|
||||
bl WatchdogException
|
||||
b ret_from_crit_exc
|
||||
|
||||
/* Other PowerPC processors, namely those derived from the 6xx-series
|
||||
* have vectors from 0x2100 through 0x2F00 defined, but marked as reserved.
|
||||
* However, for the 4xx-series processors these are neither defined nor
|
||||
* reserved.
|
||||
*/
|
||||
|
||||
__HEAD
|
||||
/* Damn, I came up one instruction too many to fit into the
|
||||
* exception space :-). Both the instruction and data TLB
|
||||
* miss get to this point to load the TLB.
|
||||
* r10 - TLB_TAG value
|
||||
* r11 - Linux PTE
|
||||
* r9 - available to use
|
||||
* PID - loaded with proper value when we get here
|
||||
* Upon exit, we reload everything and RFI.
|
||||
* Actually, it will fit now, but oh well.....a common place
|
||||
* to load the TLB.
|
||||
*/
|
||||
tlb_4xx_index:
|
||||
.long 0
|
||||
finish_tlb_load:
|
||||
/*
|
||||
* Clear out the software-only bits in the PTE to generate the
|
||||
* TLB_DATA value. These are the bottom 2 bits of the RPM, the
|
||||
* 4 bits of the zone field, and M.
|
||||
*/
|
||||
li r9, 0x0cf2
|
||||
andc r11, r11, r9
|
||||
rlwimi r11, r10, 8, 24, 27 /* Copy 4 upper address bit into zone */
|
||||
|
||||
/* load the next available TLB index. */
|
||||
lwz r9, tlb_4xx_index@l(0)
|
||||
addi r9, r9, 1
|
||||
andi. r9, r9, PPC40X_TLB_SIZE - 1
|
||||
stw r9, tlb_4xx_index@l(0)
|
||||
|
||||
tlbwe r11, r9, TLB_DATA /* Load TLB LO */
|
||||
tlbwe r10, r9, TLB_TAG /* Load TLB HI */
|
||||
|
||||
/* Done...restore registers and get out of here.
|
||||
*/
|
||||
mtspr SPRN_PID, r12
|
||||
mtcrf 0x80, r12
|
||||
mfspr r9, SPRN_SPRG_SCRATCH4
|
||||
mfspr r12, SPRN_SPRG_SCRATCH3
|
||||
mfspr r11, SPRN_SPRG_SCRATCH6
|
||||
mfspr r10, SPRN_SPRG_SCRATCH5
|
||||
rfi /* Should sync shadow TLBs */
|
||||
b . /* prevent prefetch past rfi */
|
||||
|
||||
/* This is where the main kernel code starts.
|
||||
*/
|
||||
start_here:
|
||||
|
||||
/* ptr to current */
|
||||
lis r2,init_task@h
|
||||
ori r2,r2,init_task@l
|
||||
|
||||
/* ptr to phys current thread */
|
||||
tophys(r4,r2)
|
||||
addi r4,r4,THREAD /* init task's THREAD */
|
||||
mtspr SPRN_SPRG_THREAD,r4
|
||||
|
||||
/* stack */
|
||||
lis r1,init_thread_union@ha
|
||||
addi r1,r1,init_thread_union@l
|
||||
li r0,0
|
||||
stwu r0,THREAD_SIZE-STACK_FRAME_MIN_SIZE(r1)
|
||||
|
||||
bl early_init /* We have to do this with MMU on */
|
||||
|
||||
/*
|
||||
* Decide what sort of machine this is and initialize the MMU.
|
||||
*/
|
||||
#ifdef CONFIG_KASAN
|
||||
bl kasan_early_init
|
||||
#endif
|
||||
li r3,0
|
||||
mr r4,r31
|
||||
bl machine_init
|
||||
bl MMU_init
|
||||
|
||||
/* Go back to running unmapped so we can load up new values
|
||||
* and change to using our exception vectors.
|
||||
* On the 4xx, all we have to do is invalidate the TLB to clear
|
||||
* the old 16M byte TLB mappings.
|
||||
*/
|
||||
lis r4,2f@h
|
||||
ori r4,r4,2f@l
|
||||
tophys(r4,r4)
|
||||
lis r3,(MSR_KERNEL & ~(MSR_IR|MSR_DR))@h
|
||||
ori r3,r3,(MSR_KERNEL & ~(MSR_IR|MSR_DR))@l
|
||||
mtspr SPRN_SRR0,r4
|
||||
mtspr SPRN_SRR1,r3
|
||||
rfi
|
||||
b . /* prevent prefetch past rfi */
|
||||
|
||||
/* Load up the kernel context */
|
||||
2:
|
||||
sync /* Flush to memory before changing TLB */
|
||||
tlbia
|
||||
isync /* Flush shadow TLBs */
|
||||
|
||||
/* set up the PTE pointers for the Abatron bdiGDB.
|
||||
*/
|
||||
lis r6, swapper_pg_dir@h
|
||||
ori r6, r6, swapper_pg_dir@l
|
||||
lis r5, abatron_pteptrs@h
|
||||
ori r5, r5, abatron_pteptrs@l
|
||||
stw r5, 0xf0(0) /* Must match your Abatron config file */
|
||||
tophys(r5,r5)
|
||||
stw r6, 0(r5)
|
||||
|
||||
/* Now turn on the MMU for real! */
|
||||
lis r4,MSR_KERNEL@h
|
||||
ori r4,r4,MSR_KERNEL@l
|
||||
lis r3,start_kernel@h
|
||||
ori r3,r3,start_kernel@l
|
||||
mtspr SPRN_SRR0,r3
|
||||
mtspr SPRN_SRR1,r4
|
||||
rfi /* enable MMU and jump to start_kernel */
|
||||
b . /* prevent prefetch past rfi */
|
||||
|
||||
/* Set up the initial MMU state so we can do the first level of
|
||||
* kernel initialization. This maps the first 32 MBytes of memory 1:1
|
||||
* virtual to physical and more importantly sets the cache mode.
|
||||
*/
|
||||
SYM_FUNC_START_LOCAL(initial_mmu)
|
||||
tlbia /* Invalidate all TLB entries */
|
||||
isync
|
||||
|
||||
/* We should still be executing code at physical address 0x0000xxxx
|
||||
* at this point. However, start_here is at virtual address
|
||||
* 0xC000xxxx. So, set up a TLB mapping to cover this once
|
||||
* translation is enabled.
|
||||
*/
|
||||
|
||||
lis r3,KERNELBASE@h /* Load the kernel virtual address */
|
||||
ori r3,r3,KERNELBASE@l
|
||||
tophys(r4,r3) /* Load the kernel physical address */
|
||||
|
||||
iccci r0,r3 /* Invalidate the i-cache before use */
|
||||
|
||||
/* Load the kernel PID.
|
||||
*/
|
||||
li r0,0
|
||||
mtspr SPRN_PID,r0
|
||||
sync
|
||||
|
||||
/* Configure and load one entry into TLB slots 63 */
|
||||
clrrwi r4,r4,10 /* Mask off the real page number */
|
||||
ori r4,r4,(TLB_WR | TLB_EX) /* Set the write and execute bits */
|
||||
|
||||
clrrwi r3,r3,10 /* Mask off the effective page number */
|
||||
ori r3,r3,(TLB_VALID | TLB_PAGESZ(PAGESZ_16M))
|
||||
|
||||
li r0,63 /* TLB slot 63 */
|
||||
|
||||
tlbwe r4,r0,TLB_DATA /* Load the data portion of the entry */
|
||||
tlbwe r3,r0,TLB_TAG /* Load the tag portion of the entry */
|
||||
|
||||
li r0,62 /* TLB slot 62 */
|
||||
addis r4,r4,SZ_16M@h
|
||||
addis r3,r3,SZ_16M@h
|
||||
tlbwe r4,r0,TLB_DATA /* Load the data portion of the entry */
|
||||
tlbwe r3,r0,TLB_TAG /* Load the tag portion of the entry */
|
||||
|
||||
isync
|
||||
|
||||
/* Establish the exception vector base
|
||||
*/
|
||||
lis r4,KERNELBASE@h /* EVPR only uses the high 16-bits */
|
||||
tophys(r0,r4) /* Use the physical address */
|
||||
mtspr SPRN_EVPR,r0
|
||||
|
||||
blr
|
||||
SYM_FUNC_END(initial_mmu)
|
||||
|
||||
_GLOBAL(abort)
|
||||
mfspr r13,SPRN_DBCR0
|
||||
oris r13,r13,DBCR0_RST_SYSTEM@h
|
||||
mtspr SPRN_DBCR0,r13
|
||||
@ -145,10 +145,9 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
|
||||
b transfer_to_syscall /* jump to handler */
|
||||
.endm
|
||||
|
||||
/* To handle the additional exception priority levels on 40x and Book-E
|
||||
/* To handle the additional exception priority levels on Book-E
|
||||
* processors we allocate a stack per additional priority level.
|
||||
*
|
||||
* On 40x critical is the only additional level
|
||||
* On 44x/e500 we have critical and machine check
|
||||
*
|
||||
* Additionally we reserve a SPRG for each priority level so we can free up a
|
||||
|
||||
@ -176,46 +176,6 @@ _GLOBAL(low_choose_7447a_dfs)
|
||||
|
||||
#endif /* CONFIG_CPU_FREQ_PMAC && CONFIG_PPC_BOOK3S_32 */
|
||||
|
||||
#ifdef CONFIG_40x
|
||||
|
||||
/*
|
||||
* Do an IO access in real mode
|
||||
*/
|
||||
_GLOBAL(real_readb)
|
||||
mfmsr r7
|
||||
rlwinm r0,r7,0,~MSR_DR
|
||||
sync
|
||||
mtmsr r0
|
||||
sync
|
||||
isync
|
||||
lbz r3,0(r3)
|
||||
sync
|
||||
mtmsr r7
|
||||
sync
|
||||
isync
|
||||
blr
|
||||
_ASM_NOKPROBE_SYMBOL(real_readb)
|
||||
|
||||
/*
|
||||
* Do an IO access in real mode
|
||||
*/
|
||||
_GLOBAL(real_writeb)
|
||||
mfmsr r7
|
||||
rlwinm r0,r7,0,~MSR_DR
|
||||
sync
|
||||
mtmsr r0
|
||||
sync
|
||||
isync
|
||||
stb r3,0(r4)
|
||||
sync
|
||||
mtmsr r7
|
||||
sync
|
||||
isync
|
||||
blr
|
||||
_ASM_NOKPROBE_SYMBOL(real_writeb)
|
||||
|
||||
#endif /* CONFIG_40x */
|
||||
|
||||
/*
|
||||
* Copy a whole page. We use the dcbz instruction on the destination
|
||||
* to reduce memory traffic (it eliminates the unnecessary reads of
|
||||
|
||||
@ -2244,7 +2244,7 @@ void __noreturn unrecoverable_exception(struct pt_regs *regs)
|
||||
;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_BOOKE_WDT) || defined(CONFIG_40x)
|
||||
#ifdef CONFIG_BOOKE_WDT
|
||||
DEFINE_INTERRUPT_HANDLER_NMI(WatchdogException)
|
||||
{
|
||||
printk (KERN_EMERG "PowerPC Book-E Watchdog Exception\n");
|
||||
|
||||
@ -49,9 +49,6 @@ void __init udbg_early_init(void)
|
||||
#elif defined(CONFIG_PPC_EARLY_DEBUG_44x)
|
||||
/* PPC44x debug */
|
||||
udbg_init_44x_as1();
|
||||
#elif defined(CONFIG_PPC_EARLY_DEBUG_40x)
|
||||
/* PPC40x debug */
|
||||
udbg_init_40x_realmode();
|
||||
#elif defined(CONFIG_PPC_EARLY_DEBUG_CPM)
|
||||
udbg_init_cpm();
|
||||
#elif defined(CONFIG_PPC_EARLY_DEBUG_USBGECKO)
|
||||
|
||||
@ -274,29 +274,6 @@ void __init udbg_init_44x_as1(void)
|
||||
|
||||
#endif /* CONFIG_PPC_EARLY_DEBUG_44x */
|
||||
|
||||
#ifdef CONFIG_PPC_EARLY_DEBUG_40x
|
||||
|
||||
static u8 udbg_uart_in_40x(unsigned int reg)
|
||||
{
|
||||
return real_readb((void __iomem *)CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR
|
||||
+ reg);
|
||||
}
|
||||
|
||||
static void udbg_uart_out_40x(unsigned int reg, u8 val)
|
||||
{
|
||||
real_writeb(val, (void __iomem *)CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR
|
||||
+ reg);
|
||||
}
|
||||
|
||||
void __init udbg_init_40x_realmode(void)
|
||||
{
|
||||
udbg_uart_in = udbg_uart_in_40x;
|
||||
udbg_uart_out = udbg_uart_out_40x;
|
||||
udbg_use_uart();
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PPC_EARLY_DEBUG_40x */
|
||||
|
||||
#ifdef CONFIG_PPC_EARLY_DEBUG_16550
|
||||
|
||||
static void __iomem *udbg_uart_early_addr;
|
||||
|
||||
@ -20,9 +20,9 @@
|
||||
#include <asm/trace.h>
|
||||
|
||||
/*
|
||||
* On 40x and 8xx, we directly inline tlbia and tlbivax
|
||||
* On 8xx, we directly inline tlbia
|
||||
*/
|
||||
#if defined(CONFIG_40x) || defined(CONFIG_PPC_8xx)
|
||||
#ifdef CONFIG_PPC_8xx
|
||||
static inline void _tlbil_all(void)
|
||||
{
|
||||
asm volatile ("sync; tlbia; isync" : : : "memory");
|
||||
@ -35,7 +35,7 @@ static inline void _tlbil_pid(unsigned int pid)
|
||||
}
|
||||
#define _tlbil_pid_noind(pid) _tlbil_pid(pid)
|
||||
|
||||
#else /* CONFIG_40x || CONFIG_PPC_8xx */
|
||||
#else /* CONFIG_PPC_8xx */
|
||||
extern void _tlbil_all(void);
|
||||
extern void _tlbil_pid(unsigned int pid);
|
||||
#ifdef CONFIG_PPC_BOOK3E_64
|
||||
@ -43,7 +43,7 @@ extern void _tlbil_pid_noind(unsigned int pid);
|
||||
#else
|
||||
#define _tlbil_pid_noind(pid) _tlbil_pid(pid)
|
||||
#endif
|
||||
#endif /* !(CONFIG_40x || CONFIG_PPC_8xx) */
|
||||
#endif /* !CONFIG_PPC_8xx */
|
||||
|
||||
/*
|
||||
* On 8xx, we directly inline tlbie, on others, it's extern
|
||||
|
||||
@ -1,161 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later
|
||||
/*
|
||||
* This file contains the routines for initializing the MMU
|
||||
* on the 4xx series of chips.
|
||||
* -- paulus
|
||||
*
|
||||
* Derived from arch/ppc/mm/init.c:
|
||||
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
|
||||
*
|
||||
* Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
|
||||
* and Cort Dougan (PReP) (cort@cs.nmt.edu)
|
||||
* Copyright (C) 1996 Paul Mackerras
|
||||
*
|
||||
* Derived from "arch/i386/mm/init.c"
|
||||
* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
|
||||
*/
|
||||
|
||||
#include <linux/signal.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/ptrace.h>
|
||||
#include <linux/mman.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/swap.h>
|
||||
#include <linux/stddef.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/highmem.h>
|
||||
#include <linux/memblock.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/mmu_context.h>
|
||||
#include <asm/mmu.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <asm/smp.h>
|
||||
#include <asm/bootx.h>
|
||||
#include <asm/machdep.h>
|
||||
#include <asm/setup.h>
|
||||
|
||||
#include <mm/mmu_decl.h>
|
||||
|
||||
/*
|
||||
* MMU_init_hw does the chip-specific initialization of the MMU hardware.
|
||||
*/
|
||||
void __init MMU_init_hw(void)
|
||||
{
|
||||
int i;
|
||||
unsigned long zpr;
|
||||
|
||||
/*
|
||||
* The Zone Protection Register (ZPR) defines how protection will
|
||||
* be applied to every page which is a member of a given zone.
|
||||
* The zone index bits (of ZSEL) in the PTE are used for software
|
||||
* indicators. We use the 4 upper bits of virtual address to select
|
||||
* the zone. We set all zones above TASK_SIZE to zero, allowing
|
||||
* only kernel access as indicated in the PTE. For zones below
|
||||
* TASK_SIZE, we set a 01 binary (a value of 10 will not work)
|
||||
* to allow user access as indicated in the PTE. This also allows
|
||||
* kernel access as indicated in the PTE.
|
||||
*/
|
||||
|
||||
for (i = 0, zpr = 0; i < TASK_SIZE >> 28; i++)
|
||||
zpr |= 1 << (30 - i * 2);
|
||||
|
||||
mtspr(SPRN_ZPR, zpr);
|
||||
|
||||
flush_instruction_cache();
|
||||
|
||||
/*
|
||||
* Set up the real-mode cache parameters for the exception vector
|
||||
* handlers (which are run in real-mode).
|
||||
*/
|
||||
|
||||
mtspr(SPRN_DCWR, 0x00000000); /* All caching is write-back */
|
||||
|
||||
/*
|
||||
* Cache instruction and data space where the exception
|
||||
* vectors and the kernel live in real-mode.
|
||||
*/
|
||||
|
||||
mtspr(SPRN_DCCR, 0xFFFF0000); /* 2GByte of data space at 0x0. */
|
||||
mtspr(SPRN_ICCR, 0xFFFF0000); /* 2GByte of instr. space at 0x0. */
|
||||
}
|
||||
|
||||
#define LARGE_PAGE_SIZE_16M (1<<24)
|
||||
#define LARGE_PAGE_SIZE_4M (1<<22)
|
||||
|
||||
unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
|
||||
{
|
||||
unsigned long v, s, mapped;
|
||||
phys_addr_t p;
|
||||
|
||||
v = KERNELBASE;
|
||||
p = 0;
|
||||
s = total_lowmem;
|
||||
|
||||
if (IS_ENABLED(CONFIG_KFENCE))
|
||||
return 0;
|
||||
|
||||
if (debug_pagealloc_enabled())
|
||||
return 0;
|
||||
|
||||
if (strict_kernel_rwx_enabled())
|
||||
return 0;
|
||||
|
||||
while (s >= LARGE_PAGE_SIZE_16M) {
|
||||
pmd_t *pmdp;
|
||||
unsigned long val = p | _PMD_SIZE_16M | _PAGE_EXEC | _PAGE_RW;
|
||||
|
||||
pmdp = pmd_off_k(v);
|
||||
*pmdp++ = __pmd(val);
|
||||
*pmdp++ = __pmd(val);
|
||||
*pmdp++ = __pmd(val);
|
||||
*pmdp++ = __pmd(val);
|
||||
|
||||
v += LARGE_PAGE_SIZE_16M;
|
||||
p += LARGE_PAGE_SIZE_16M;
|
||||
s -= LARGE_PAGE_SIZE_16M;
|
||||
}
|
||||
|
||||
while (s >= LARGE_PAGE_SIZE_4M) {
|
||||
pmd_t *pmdp;
|
||||
unsigned long val = p | _PMD_SIZE_4M | _PAGE_EXEC | _PAGE_RW;
|
||||
|
||||
pmdp = pmd_off_k(v);
|
||||
*pmdp = __pmd(val);
|
||||
|
||||
v += LARGE_PAGE_SIZE_4M;
|
||||
p += LARGE_PAGE_SIZE_4M;
|
||||
s -= LARGE_PAGE_SIZE_4M;
|
||||
}
|
||||
|
||||
mapped = total_lowmem - s;
|
||||
|
||||
/* If the size of RAM is not an exact power of two, we may not
|
||||
* have covered RAM in its entirety with 16 and 4 MiB
|
||||
* pages. Consequently, restrict the top end of RAM currently
|
||||
* allocable so that calls to the MEMBLOCK to allocate PTEs for "tail"
|
||||
* coverage with normal-sized pages (or other reasons) do not
|
||||
* attempt to allocate outside the allowed range.
|
||||
*/
|
||||
memblock_set_current_limit(mapped);
|
||||
|
||||
return mapped;
|
||||
}
|
||||
|
||||
void setup_initial_memory_limit(phys_addr_t first_memblock_base,
|
||||
phys_addr_t first_memblock_size)
|
||||
{
|
||||
/* We don't currently support the first MEMBLOCK not mapping 0
|
||||
* physical on those processors
|
||||
*/
|
||||
BUG_ON(first_memblock_base != 0);
|
||||
|
||||
/* 40x can only access 16MB at the moment (see head_40x.S) */
|
||||
memblock_set_current_limit(min_t(u64, first_memblock_size, 0x00800000));
|
||||
}
|
||||
@ -2,7 +2,6 @@
|
||||
|
||||
obj-y += mmu_context.o tlb.o tlb_low.o kup.o
|
||||
obj-$(CONFIG_PPC_BOOK3E_64) += tlb_low_64e.o book3e_pgtable.o
|
||||
obj-$(CONFIG_40x) += 40x.o
|
||||
obj-$(CONFIG_44x) += 44x.o
|
||||
obj-$(CONFIG_PPC_8xx) += 8xx.o
|
||||
obj-$(CONFIG_PPC_E500) += e500.o
|
||||
|
||||
@ -15,8 +15,6 @@
|
||||
void setup_kuap(bool disabled)
|
||||
{
|
||||
if (disabled) {
|
||||
if (IS_ENABLED(CONFIG_40x))
|
||||
disable_kuep = true;
|
||||
if (smp_processor_id() == boot_cpuid)
|
||||
cur_cpu_spec->mmu_features &= ~MMU_FTR_KUAP;
|
||||
return;
|
||||
|
||||
@ -219,9 +219,6 @@ static void set_context(unsigned long id, pgd_t *pgd)
|
||||
/* sync */
|
||||
mb();
|
||||
} else if (kuap_is_disabled()) {
|
||||
if (IS_ENABLED(CONFIG_40x))
|
||||
mb(); /* sync */
|
||||
|
||||
mtspr(SPRN_PID, id);
|
||||
isync();
|
||||
}
|
||||
|
||||
@ -32,32 +32,7 @@
|
||||
#include <asm/asm-compat.h>
|
||||
#include <asm/feature-fixups.h>
|
||||
|
||||
#if defined(CONFIG_40x)
|
||||
|
||||
/*
|
||||
* 40x implementation needs only tlbil_va
|
||||
*/
|
||||
_GLOBAL(__tlbil_va)
|
||||
/* We run the search with interrupts disabled because we have to change
|
||||
* the PID and I don't want to preempt when that happens.
|
||||
*/
|
||||
mfmsr r5
|
||||
mfspr r6,SPRN_PID
|
||||
wrteei 0
|
||||
mtspr SPRN_PID,r4
|
||||
tlbsx. r3, 0, r3
|
||||
mtspr SPRN_PID,r6
|
||||
wrtee r5
|
||||
bne 1f
|
||||
sync
|
||||
/* There are only 64 TLB entries, so r3 < 64, which means bit 25 is
|
||||
* clear. Since 25 is the V bit in the TLB_TAG, loading this value
|
||||
* will invalidate the TLB entry. */
|
||||
tlbwe r3, r3, TLB_TAG
|
||||
isync
|
||||
1: blr
|
||||
|
||||
#elif defined(CONFIG_PPC_8xx)
|
||||
#if defined(CONFIG_PPC_8xx)
|
||||
|
||||
/*
|
||||
* Nothing to do for 8xx, everything is inline
|
||||
|
||||
@ -1263,102 +1263,6 @@ static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = {
|
||||
|
||||
#endif /* CONFIG_44x */
|
||||
|
||||
#ifdef CONFIG_40x
|
||||
|
||||
static int __init ppc405ex_pciex_core_init(struct device_node *np)
|
||||
{
|
||||
/* Nothing to do, return 2 ports */
|
||||
return 2;
|
||||
}
|
||||
|
||||
static void __init ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port)
|
||||
{
|
||||
/* Assert the PE0_PHY reset */
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000);
|
||||
msleep(1);
|
||||
|
||||
/* deassert the PE0_hotreset */
|
||||
if (port->endpoint)
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000);
|
||||
else
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000);
|
||||
|
||||
/* poll for phy !reset */
|
||||
/* XXX FIXME add timeout */
|
||||
while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000))
|
||||
;
|
||||
|
||||
/* deassert the PE0_gpl_utl_reset */
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000);
|
||||
}
|
||||
|
||||
static int __init ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if (port->endpoint)
|
||||
val = PTYPE_LEGACY_ENDPOINT;
|
||||
else
|
||||
val = PTYPE_ROOT_PORT;
|
||||
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET,
|
||||
1 << 24 | val << 20 | LNKW_X1 << 12);
|
||||
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000);
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000);
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000);
|
||||
mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003);
|
||||
|
||||
/*
|
||||
* Only reset the PHY when no link is currently established.
|
||||
* This is for the Atheros PCIe board which has problems to establish
|
||||
* the link (again) after this PHY reset. All other currently tested
|
||||
* PCIe boards don't show this problem.
|
||||
* This has to be re-tested and fixed in a later release!
|
||||
*/
|
||||
val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP);
|
||||
if (!(val & 0x00001000))
|
||||
ppc405ex_pcie_phy_reset(port);
|
||||
|
||||
dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */
|
||||
|
||||
port->has_ibpre = 1;
|
||||
|
||||
return ppc4xx_pciex_port_reset_sdr(port);
|
||||
}
|
||||
|
||||
static int ppc405ex_pciex_init_utl(struct ppc4xx_pciex_port *port)
|
||||
{
|
||||
dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0);
|
||||
|
||||
/*
|
||||
* Set buffer allocations and then assert VRB and TXE.
|
||||
*/
|
||||
out_be32(port->utl_base + PEUTL_OUTTR, 0x02000000);
|
||||
out_be32(port->utl_base + PEUTL_INTR, 0x02000000);
|
||||
out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000);
|
||||
out_be32(port->utl_base + PEUTL_PBBSZ, 0x21000000);
|
||||
out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000);
|
||||
out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000);
|
||||
out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000);
|
||||
out_be32(port->utl_base + PEUTL_PCTL, 0x80800066);
|
||||
|
||||
out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata =
|
||||
{
|
||||
.want_sdr = true,
|
||||
.core_init = ppc405ex_pciex_core_init,
|
||||
.port_init_hw = ppc405ex_pciex_init_port_hw,
|
||||
.setup_utl = ppc405ex_pciex_init_utl,
|
||||
.check_link = ppc4xx_pciex_check_link_sdr,
|
||||
};
|
||||
|
||||
#endif /* CONFIG_40x */
|
||||
|
||||
#ifdef CONFIG_476FPE
|
||||
static int __init ppc_476fpe_pciex_core_init(struct device_node *np)
|
||||
{
|
||||
@ -1427,10 +1331,6 @@ static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
|
||||
if (of_device_is_compatible(np, "ibm,plb-pciex-apm821xx"))
|
||||
ppc4xx_pciex_hwops = &apm821xx_pcie_hwops;
|
||||
#endif /* CONFIG_44x */
|
||||
#ifdef CONFIG_40x
|
||||
if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))
|
||||
ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops;
|
||||
#endif
|
||||
#ifdef CONFIG_476FPE
|
||||
if (of_device_is_compatible(np, "ibm,plb-pciex-476fpe")
|
||||
|| of_device_is_compatible(np, "ibm,plb-pciex-476gtr"))
|
||||
|
||||
@ -27,7 +27,6 @@ arch/mips/kernel/head.o
|
||||
arch/nios2/kernel/head.o
|
||||
arch/openrisc/kernel/head.o
|
||||
arch/parisc/kernel/head.o
|
||||
arch/powerpc/kernel/head_40x.o
|
||||
arch/powerpc/kernel/head_44x.o
|
||||
arch/powerpc/kernel/head_64.o
|
||||
arch/powerpc/kernel/head_8xx.o
|
||||
|
||||
Loading…
Reference in New Issue
Block a user