diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 1f9f5da6828fa5d416da3f1e83a48cd56612dd53..9fb7dc7ca7f4d223402a78041d76a4d05c46e042 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -6,6 +6,7 @@ #include <linux/mm_types.h> #include <linux/bug.h> +#include <linux/errno.h> #if 4 - defined(__PAGETABLE_PUD_FOLDED) - defined(__PAGETABLE_PMD_FOLDED) != \ CONFIG_PGTABLE_LEVELS @@ -696,6 +697,20 @@ static inline int pmd_protnone(pmd_t pmd) #endif /* CONFIG_MMU */ +#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP +int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot); +int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot); +#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */ +static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot) +{ + return 0; +} +static inline int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot) +{ + return 0; +} +#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ + #endif /* !__ASSEMBLY__ */ #ifndef io_remap_pfn_range diff --git a/lib/ioremap.c b/lib/ioremap.c index 2008652c9a1f5c5c59aabd5c7de39a59e22c55da..be249062ba6e5e3ab54c5deec5aa413c9cc5566c 100644 --- a/lib/ioremap.c +++ b/lib/ioremap.c @@ -80,6 +80,14 @@ static inline int ioremap_pmd_range(pud_t *pud, unsigned long addr, return -ENOMEM; do { next = pmd_addr_end(addr, end); + + if (ioremap_pmd_enabled() && + ((next - addr) == PMD_SIZE) && + IS_ALIGNED(phys_addr + addr, PMD_SIZE)) { + if (pmd_set_huge(pmd, phys_addr + addr, prot)) + continue; + } + if (ioremap_pte_range(pmd, addr, next, phys_addr + addr, prot)) return -ENOMEM; } while (pmd++, addr = next, addr != end); @@ -98,6 +106,14 @@ static inline int ioremap_pud_range(pgd_t *pgd, unsigned long addr, return -ENOMEM; do { next = pud_addr_end(addr, end); + + if (ioremap_pud_enabled() && + ((next - addr) == PUD_SIZE) && + IS_ALIGNED(phys_addr + addr, PUD_SIZE)) { + if (pud_set_huge(pud, phys_addr + addr, prot)) + continue; + } + if (ioremap_pmd_range(pud, addr, next, phys_addr + addr, prot)) return -ENOMEM; } while (pud++, addr = next, addr != end);