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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-05-19 05:48:58 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-05-26 22:22:19 +1000 |
| commit | 925ac141d106b55acbe112a9272f970631a3c082 (patch) | |
| tree | dd8af6d39c2dc563a235af298b36cb964105f2f2 /arch/powerpc/include/asm/fixmap.h | |
| parent | powerpc/32s: Don't warn when mapping RO data ROX. (diff) | |
| download | linux-dev-925ac141d106b55acbe112a9272f970631a3c082.tar.xz linux-dev-925ac141d106b55acbe112a9272f970631a3c082.zip | |
powerpc/mm: Allocate static page tables for fixmap
Allocate static page tables for the fixmap area. This allows
setting mappings through page tables before memblock is ready.
That's needed to use early_ioremap() early and to use standard
page mappings with fixmap.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4f4b1412d34de6801b8e925cb88fc69d056ff536.1589866984.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include/asm/fixmap.h')
| -rw-r--r-- | arch/powerpc/include/asm/fixmap.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h index 2ef155a3c821..ccbe2e83c950 100644 --- a/arch/powerpc/include/asm/fixmap.h +++ b/arch/powerpc/include/asm/fixmap.h @@ -86,6 +86,10 @@ enum fixed_addresses { #define __FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE) +#define FIXMAP_ALIGNED_SIZE (ALIGN(FIXADDR_TOP, PGDIR_SIZE) - \ + ALIGN_DOWN(FIXADDR_START, PGDIR_SIZE)) +#define FIXMAP_PTE_SIZE (FIXMAP_ALIGNED_SIZE / PGDIR_SIZE * PTE_TABLE_SIZE) + #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NCG #define FIXMAP_PAGE_IO PAGE_KERNEL_NCG |