From e5bf75ca33946d81c82014168042a64db7c81551 Mon Sep 17 00:00:00 2001 From: Pan Jiafei Date: Thu, 17 Mar 2016 02:01:03 +0000 Subject: [PATCH] arm: add new non-shareable ioremap Signed-off-by: Pan Jiafei Signed-off-by: Roy Pledge --- arch/arm/include/asm/io.h | 3 +++ arch/arm/include/asm/mach/map.h | 4 ++-- arch/arm/mm/ioremap.c | 7 +++++++ arch/arm/mm/mmu.c | 9 +++++++++ 4 files changed, 21 insertions(+), 2 deletions(-) --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -123,6 +123,7 @@ static inline u32 __raw_readl(const vola #define MT_DEVICE_NONSHARED 1 #define MT_DEVICE_CACHED 2 #define MT_DEVICE_WC 3 +#define MT_MEMORY_RW_NS 4 /* * types 4 onwards can be found in asm/mach/map.h and are undefined * for ioremap @@ -438,6 +439,8 @@ void __iomem *ioremap_wc(resource_size_t #define ioremap_wc ioremap_wc #define ioremap_wt ioremap_wc +void __iomem *ioremap_cache_ns(resource_size_t res_cookie, size_t size); + void iounmap(volatile void __iomem *iomem_cookie); #define iounmap iounmap --- a/arch/arm/include/asm/mach/map.h +++ b/arch/arm/include/asm/mach/map.h @@ -18,9 +18,9 @@ struct map_desc { unsigned int type; }; -/* types 0-3 are defined in asm/io.h */ +/* types 0-4 are defined in asm/io.h */ enum { - MT_UNCACHED = 4, + MT_UNCACHED = 5, MT_CACHECLEAN, MT_MINICLEAN, MT_LOW_VECTORS, --- a/arch/arm/mm/ioremap.c +++ b/arch/arm/mm/ioremap.c @@ -399,6 +399,13 @@ void __iomem *ioremap_wc(resource_size_t } EXPORT_SYMBOL(ioremap_wc); +void __iomem *ioremap_cache_ns(resource_size_t res_cookie, size_t size) +{ + return arch_ioremap_caller(res_cookie, size, MT_MEMORY_RW_NS, + __builtin_return_address(0)); +} +EXPORT_SYMBOL(ioremap_cache_ns); + /* * Remap an arbitrary physical address space into the kernel virtual * address space as memory. Needed when the kernel wants to execute --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -314,6 +314,13 @@ static struct mem_type mem_types[] __ro_ .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE, .domain = DOMAIN_KERNEL, }, + [MT_MEMORY_RW_NS] = { + .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | + L_PTE_XN, + .prot_l1 = PMD_TYPE_TABLE, + .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_XN, + .domain = DOMAIN_KERNEL, + }, [MT_ROM] = { .prot_sect = PMD_TYPE_SECT, .domain = DOMAIN_KERNEL, @@ -650,6 +657,7 @@ static void __init build_mem_type_table( } kern_pgprot |= PTE_EXT_AF; vecs_pgprot |= PTE_EXT_AF; + mem_types[MT_MEMORY_RW_NS].prot_pte |= PTE_EXT_AF | cp->pte; /* * Set PXN for user mappings @@ -678,6 +686,7 @@ static void __init build_mem_type_table( mem_types[MT_MEMORY_RWX].prot_pte |= kern_pgprot; mem_types[MT_MEMORY_RW].prot_sect |= ecc_mask | cp->pmd; mem_types[MT_MEMORY_RW].prot_pte |= kern_pgprot; + mem_types[MT_MEMORY_RW_NS].prot_sect |= ecc_mask | cp->pmd; mem_types[MT_MEMORY_DMA_READY].prot_pte |= kern_pgprot; mem_types[MT_MEMORY_RWX_NONCACHED].prot_sect |= ecc_mask; mem_types[MT_ROM].prot_sect |= cp->pmd;