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| author | Guo Ren <ren_guo@c-sky.com> | 2018-11-20 09:06:57 +0100 |
|---|---|---|
| committer | Guo Ren <ren_guo@c-sky.com> | 2018-12-03 03:49:11 +0100 |
| commit | 63e19c8216bb03a1b4d10f6637d1324ae7a2b612 (patch) | |
| tree | e262771a315b279237acea490c54e110d198af1c /arch/csky | |
| parent | MAINTAINERS: add maintainer for C-SKY drivers (diff) | |
| download | linux-63e19c8216bb03a1b4d10f6637d1324ae7a2b612.tar.xz linux-63e19c8216bb03a1b4d10f6637d1324ae7a2b612.zip | |
csky: bugfix tlb_get_pgd error.
It's wrong to mask/unmask highest bit in addr to translate the vaddr
to paddr. We should use PAGE_OFFSET and PHYS_OFFSET.
Wrong implement:
return ((get_pgd()|(1<<31)) - PHYS_OFFSET) & ~1;
When PHYS_OFFSET=0xc0000000 and get_pgd() return 0xe0000000, it'll
return 0x60000000. It's wrong and should be 0xa0000000.
Now correct it to:
return ((get_pgd() - PHYS_OFFSET) & ~1) + PAGE_OFFSET;
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Diffstat (limited to 'arch/csky')
| -rw-r--r-- | arch/csky/include/asm/mmu_context.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/csky/include/asm/mmu_context.h b/arch/csky/include/asm/mmu_context.h index c410aa4fff1a..b2905c0485a7 100644 --- a/arch/csky/include/asm/mmu_context.h +++ b/arch/csky/include/asm/mmu_context.h @@ -16,7 +16,7 @@ static inline void tlbmiss_handler_setup_pgd(unsigned long pgd, bool kernel) { - pgd &= ~(1<<31); + pgd -= PAGE_OFFSET; pgd += PHYS_OFFSET; pgd |= 1; setup_pgd(pgd, kernel); @@ -29,7 +29,7 @@ static inline void tlbmiss_handler_setup_pgd(unsigned long pgd, bool kernel) static inline unsigned long tlb_get_pgd(void) { - return ((get_pgd()|(1<<31)) - PHYS_OFFSET) & ~1; + return ((get_pgd() - PHYS_OFFSET) & ~1) + PAGE_OFFSET; } #define cpu_context(cpu, mm) ((mm)->context.asid[cpu]) |