]> git.baikalelectronics.ru Git - kernel.git/commit
csky: bugfix tlb_get_pgd error.
authorGuo Ren <ren_guo@c-sky.com>
Tue, 20 Nov 2018 08:06:57 +0000 (16:06 +0800)
committerGuo Ren <ren_guo@c-sky.com>
Mon, 3 Dec 2018 02:49:11 +0000 (10:49 +0800)
commitf9f9d81b7d051168c33bd5f23ccf20dc834ffffc
treee262771a315b279237acea490c54e110d198af1c
parent592d0a10e225b4bbf3d30650d3c2054b0b9a1377
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>
arch/csky/include/asm/mmu_context.h