mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-16 15:34:48 +08:00
e31cf2f4ca
Patch series "mm: consolidate definitions of page table accessors", v2.
The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once. For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.
Most of these definitions are actually identical and typically it boils
down to, e.g.
static inline unsigned long pmd_index(unsigned long address)
{
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}
These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.
For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.
These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.
This patch (of 12):
The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g. pte_alloc() and
pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.
The include statements in such cases are remove with a simple loop:
for f in $(git grep -l "include <linux/mm.h>") ; do
sed -i -e '/include <asm\/pgtable.h>/ d' $f
done
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Dump R3000 TLB for debugging purposes.
|
|
*
|
|
* Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
|
|
* Copyright (C) 1999 by Silicon Graphics, Inc.
|
|
* Copyright (C) 1999 by Harald Koerfgen
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/page.h>
|
|
#include <asm/tlbdebug.h>
|
|
|
|
extern int r3k_have_wired_reg;
|
|
|
|
void dump_tlb_regs(void)
|
|
{
|
|
pr_info("Index : %0x\n", read_c0_index());
|
|
pr_info("EntryHi : %0lx\n", read_c0_entryhi());
|
|
pr_info("EntryLo : %0lx\n", read_c0_entrylo0());
|
|
if (r3k_have_wired_reg)
|
|
pr_info("Wired : %0x\n", read_c0_wired());
|
|
}
|
|
|
|
static void dump_tlb(int first, int last)
|
|
{
|
|
int i;
|
|
unsigned int asid;
|
|
unsigned long entryhi, entrylo0, asid_mask;
|
|
|
|
asid_mask = cpu_asid_mask(¤t_cpu_data);
|
|
asid = read_c0_entryhi() & asid_mask;
|
|
|
|
for (i = first; i <= last; i++) {
|
|
write_c0_index(i<<8);
|
|
__asm__ __volatile__(
|
|
".set\tnoreorder\n\t"
|
|
"tlbr\n\t"
|
|
"nop\n\t"
|
|
".set\treorder");
|
|
entryhi = read_c0_entryhi();
|
|
entrylo0 = read_c0_entrylo0();
|
|
|
|
/* Unused entries have a virtual address of KSEG0. */
|
|
if ((entryhi & PAGE_MASK) != KSEG0 &&
|
|
(entrylo0 & R3K_ENTRYLO_G ||
|
|
(entryhi & asid_mask) == asid)) {
|
|
/*
|
|
* Only print entries in use
|
|
*/
|
|
printk("Index: %2d ", i);
|
|
|
|
pr_cont("va=%08lx asid=%08lx"
|
|
" [pa=%06lx n=%d d=%d v=%d g=%d]",
|
|
entryhi & PAGE_MASK,
|
|
entryhi & asid_mask,
|
|
entrylo0 & PAGE_MASK,
|
|
(entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
|
|
(entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
|
|
(entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
|
|
(entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
|
|
}
|
|
}
|
|
printk("\n");
|
|
|
|
write_c0_entryhi(asid);
|
|
}
|
|
|
|
void dump_tlb_all(void)
|
|
{
|
|
dump_tlb(0, current_cpu_data.tlbsize - 1);
|
|
}
|