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From e5bf75ca33946d81c82014168042a64db7c81551 Mon Sep 17 00:00:00 2001
From: Pan Jiafei <Jiafei.Pan@nxp.com>
Date: Thu, 17 Mar 2016 02:01:03 +0000
Subject: [PATCH] arm: add new non-shareable ioremap
Signed-off-by: Pan Jiafei <Jiafei.Pan@nxp.com>
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
---
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
@@ -401,6 +401,13 @@ 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;
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