diff options
Diffstat (limited to 'arch/arm/cpu/armv8/cache_v8.c')
| -rw-r--r-- | arch/arm/cpu/armv8/cache_v8.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c index c9948e99e2e..12ae9bd0603 100644 --- a/arch/arm/cpu/armv8/cache_v8.c +++ b/arch/arm/cpu/armv8/cache_v8.c @@ -14,6 +14,7 @@ #include <asm/global_data.h> #include <asm/system.h> #include <asm/armv8/mmu.h> +#include <linux/errno.h> DECLARE_GLOBAL_DATA_PTR; @@ -1032,6 +1033,30 @@ void mmu_change_region_attr(phys_addr_t addr, size_t siz, u64 attrs) mmu_change_region_attr_nobreak(addr, siz, attrs); } +int pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm) +{ + u64 attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_INNER_SHARE | PTE_TYPE_VALID; + + switch (perm) { + case MMU_ATTR_RO: + attrs |= PTE_BLOCK_PXN | PTE_BLOCK_UXN | PTE_BLOCK_RO; + break; + case MMU_ATTR_RX: + attrs |= PTE_BLOCK_RO; + break; + case MMU_ATTR_RW: + attrs |= PTE_BLOCK_PXN | PTE_BLOCK_UXN; + break; + default: + log_err("Unknown attribute %d\n", perm); + return -EINVAL; + } + + mmu_change_region_attr_nobreak(addr, size, attrs); + + return 0; +} + #else /* !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) */ /* |