diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/fixmap.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 16 |
3 files changed, 21 insertions, 1 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 diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 15f0a7c84944..d642e42eabb1 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -80,7 +80,7 @@ notrace void __init machine_init(u64 dt_ptr) /* Configure static keys first, now that we're relocated. */ setup_feature_keys(); - early_ioremap_setup(); + early_ioremap_init(); /* Enable early debugging if any specified (see udbg.h) */ udbg_early_init(); diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index f62de06e3d07..9934659cb871 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -29,11 +29,27 @@ #include <asm/fixmap.h> #include <asm/setup.h> #include <asm/sections.h> +#include <asm/early_ioremap.h> #include <mm/mmu_decl.h> extern char etext[], _stext[], _sinittext[], _einittext[]; +static u8 early_fixmap_pagetable[FIXMAP_PTE_SIZE] __page_aligned_data; + +notrace void __init early_ioremap_init(void) +{ + unsigned long addr = ALIGN_DOWN(FIXADDR_START, PGDIR_SIZE); + pte_t *ptep = (pte_t *)early_fixmap_pagetable; + pmd_t *pmdp = pmd_ptr_k(addr); + + for (; (s32)(FIXADDR_TOP - addr) > 0; + addr += PGDIR_SIZE, ptep += PTRS_PER_PTE, pmdp++) + pmd_populate_kernel(&init_mm, pmdp, ptep); + + early_ioremap_setup(); +} + static void __init *early_alloc_pgtable(unsigned long size) { void *ptr = memblock_alloc(size, size); |