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authorGuo Ren <ren_guo@c-sky.com>2018-11-20 16:06:57 +0800
committerGuo Ren <ren_guo@c-sky.com>2018-12-03 10:49:11 +0800
commit63e19c8216bb03a1b4d10f6637d1324ae7a2b612 (patch)
treee262771a315b279237acea490c54e110d198af1c /arch/csky
parentb4b84da36403bf1142d17fe7b06c2d639c9c9b8b (diff)
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.h4
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])