diff options
Diffstat (limited to 'arch/arm/mm/mmu.c')
| -rw-r--r-- | arch/arm/mm/mmu.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 4e016d7f37b3..347cca965783 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -414,6 +414,11 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot) FIXADDR_END); BUG_ON(idx >= __end_of_fixed_addresses); + /* we only support device mappings until pgprot_kernel has been set */ + if (WARN_ON(pgprot_val(prot) != pgprot_val(FIXMAP_PAGE_IO) && + pgprot_val(pgprot_kernel) == 0)) + return; + if (pgprot_val(prot)) set_pte_at(NULL, vaddr, pte, pfn_pte(phys >> PAGE_SHIFT, prot)); @@ -1492,7 +1497,7 @@ pgtables_remap lpae_pgtables_remap_asm; * early_paging_init() recreates boot time page table setup, allowing machines * to switch over to a high (>4G) address space on LPAE systems */ -void __init early_paging_init(const struct machine_desc *mdesc) +static void __init early_paging_init(const struct machine_desc *mdesc) { pgtables_remap *lpae_pgtables_remap; unsigned long pa_pgd; @@ -1560,7 +1565,7 @@ void __init early_paging_init(const struct machine_desc *mdesc) #else -void __init early_paging_init(const struct machine_desc *mdesc) +static void __init early_paging_init(const struct machine_desc *mdesc) { long long offset; @@ -1616,7 +1621,6 @@ void __init paging_init(const struct machine_desc *mdesc) { void *zero_page; - build_mem_type_table(); prepare_page_table(); map_lowmem(); memblock_set_current_limit(arm_lowmem_limit); @@ -1636,3 +1640,9 @@ void __init paging_init(const struct machine_desc *mdesc) empty_zero_page = virt_to_page(zero_page); __flush_dcache_page(NULL, empty_zero_page); } + +void __init early_mm_init(const struct machine_desc *mdesc) +{ + build_mem_type_table(); + early_paging_init(mdesc); +} |