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https://github.com/edk2-porting/linux-next.git
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f62e31623d
Before this patch csky-linux need CONFIG_RAM_BASE to determine start physical address. Now we use phys_offset variable to replace the macro of PHYS_OFFSET and we setup phys_offset with real physical address which is determined during startup in head.S. With this patch we needn't re-compile kernel for different start physical address. ie: 0x0 / 0xc0000000 start physical address could use the same vmlinux, be care different start address must be 512MB aligned. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
96 lines
1.5 KiB
C
96 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#ifndef __ASM_CSKY_CKMMUV1_H
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#define __ASM_CSKY_CKMMUV1_H
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#include <abi/reg_ops.h>
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static inline int read_mmu_index(void)
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{
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return cprcr("cpcr0");
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}
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static inline void write_mmu_index(int value)
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{
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cpwcr("cpcr0", value);
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}
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static inline int read_mmu_entrylo0(void)
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{
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return cprcr("cpcr2") << 6;
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}
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static inline int read_mmu_entrylo1(void)
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{
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return cprcr("cpcr3") << 6;
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}
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static inline void write_mmu_pagemask(int value)
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{
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cpwcr("cpcr6", value);
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}
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static inline int read_mmu_entryhi(void)
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{
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return cprcr("cpcr4");
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}
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static inline void write_mmu_entryhi(int value)
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{
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cpwcr("cpcr4", value);
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}
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static inline unsigned long read_mmu_msa0(void)
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{
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return cprcr("cpcr30");
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}
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static inline void write_mmu_msa0(unsigned long value)
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{
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cpwcr("cpcr30", value);
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}
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static inline unsigned long read_mmu_msa1(void)
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{
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return cprcr("cpcr31");
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}
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static inline void write_mmu_msa1(unsigned long value)
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{
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cpwcr("cpcr31", value);
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}
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/*
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* TLB operations.
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*/
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static inline void tlb_probe(void)
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{
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cpwcr("cpcr8", 0x80000000);
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}
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static inline void tlb_read(void)
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{
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cpwcr("cpcr8", 0x40000000);
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}
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static inline void tlb_invalid_all(void)
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{
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cpwcr("cpcr8", 0x04000000);
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}
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static inline void tlb_invalid_indexed(void)
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{
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cpwcr("cpcr8", 0x02000000);
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}
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static inline void setup_pgd(unsigned long pgd, bool kernel)
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{
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cpwcr("cpcr29", pgd);
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}
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static inline unsigned long get_pgd(void)
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{
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return cprcr("cpcr29");
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}
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#endif /* __ASM_CSKY_CKMMUV1_H */
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