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Diffstat (limited to 'arch/arm/mm/ioremap.c')
-rw-r--r--arch/arm/mm/ioremap.c80
1 files changed, 34 insertions, 46 deletions
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 0ac615c0f798..d6167ad4e011 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -32,6 +32,9 @@
#include <asm/tlbflush.h>
#include <asm/sizes.h>
+#include <asm/mach/map.h>
+#include "mm.h"
+
/*
* Used by ioremap() and iounmap() code to mark (super)section-mapped
* I/O regions in vm_struct->flags field.
@@ -39,8 +42,9 @@
#define VM_ARM_SECTION_MAPPING 0x80000000
static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
- unsigned long phys_addr, pgprot_t prot)
+ unsigned long phys_addr, const struct mem_type *type)
{
+ pgprot_t prot = __pgprot(type->prot_pte);
pte_t *pte;
pte = pte_alloc_kernel(pmd, addr);
@@ -51,7 +55,8 @@ static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
if (!pte_none(*pte))
goto bad;
- set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot), 0);
+ set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot),
+ type->prot_pte_ext);
phys_addr += PAGE_SIZE;
} while (pte++, addr += PAGE_SIZE, addr != end);
return 0;
@@ -63,7 +68,7 @@ static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
static inline int remap_area_pmd(pgd_t *pgd, unsigned long addr,
unsigned long end, unsigned long phys_addr,
- pgprot_t prot)
+ const struct mem_type *type)
{
unsigned long next;
pmd_t *pmd;
@@ -75,7 +80,7 @@ static inline int remap_area_pmd(pgd_t *pgd, unsigned long addr,
do {
next = pmd_addr_end(addr, end);
- ret = remap_area_pte(pmd, addr, next, phys_addr, prot);
+ ret = remap_area_pte(pmd, addr, next, phys_addr, type);
if (ret)
return ret;
phys_addr += next - addr;
@@ -84,13 +89,11 @@ static inline int remap_area_pmd(pgd_t *pgd, unsigned long addr,
}
static int remap_area_pages(unsigned long start, unsigned long pfn,
- unsigned long size, unsigned long flags)
+ size_t size, const struct mem_type *type)
{
unsigned long addr = start;
unsigned long next, end = start + size;
unsigned long phys_addr = __pfn_to_phys(pfn);
- pgprot_t prot = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG |
- L_PTE_DIRTY | L_PTE_WRITE | flags);
pgd_t *pgd;
int err = 0;
@@ -98,7 +101,7 @@ static int remap_area_pages(unsigned long start, unsigned long pfn,
pgd = pgd_offset_k(addr);
do {
next = pgd_addr_end(addr, end);
- err = remap_area_pmd(pgd, addr, next, phys_addr, prot);
+ err = remap_area_pmd(pgd, addr, next, phys_addr, type);
if (err)
break;
phys_addr += next - addr;
@@ -178,9 +181,9 @@ static void unmap_area_sections(unsigned long virt, unsigned long size)
static int
remap_area_sections(unsigned long virt, unsigned long pfn,
- unsigned long size, unsigned long flags)
+ size_t size, const struct mem_type *type)
{
- unsigned long prot, addr = virt, end = virt + size;
+ unsigned long addr = virt, end = virt + size;
pgd_t *pgd;
/*
@@ -189,23 +192,13 @@ remap_area_sections(unsigned long virt, unsigned long pfn,
*/
unmap_area_sections(virt, size);
- prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO) |
- (flags & (L_PTE_CACHEABLE | L_PTE_BUFFERABLE));
-
- /*
- * ARMv6 and above need XN set to prevent speculative prefetches
- * hitting IO.
- */
- if (cpu_architecture() >= CPU_ARCH_ARMv6)
- prot |= PMD_SECT_XN;
-
pgd = pgd_offset_k(addr);
do {
pmd_t *pmd = pmd_offset(pgd, addr);
- pmd[0] = __pmd(__pfn_to_phys(pfn) | prot);
+ pmd[0] = __pmd(__pfn_to_phys(pfn) | type->prot_sect);
pfn += SZ_1M >> PAGE_SHIFT;
- pmd[1] = __pmd(__pfn_to_phys(pfn) | prot);
+ pmd[1] = __pmd(__pfn_to_phys(pfn) | type->prot_sect);
pfn += SZ_1M >> PAGE_SHIFT;
flush_pmd_entry(pmd);
@@ -218,9 +211,9 @@ remap_area_sections(unsigned long virt, unsigned long pfn,
static int
remap_area_supersections(unsigned long virt, unsigned long pfn,
- unsigned long size, unsigned long flags)
+ size_t size, const struct mem_type *type)
{
- unsigned long prot, addr = virt, end = virt + size;
+ unsigned long addr = virt, end = virt + size;
pgd_t *pgd;
/*
@@ -229,22 +222,12 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
*/
unmap_area_sections(virt, size);
- prot = PMD_TYPE_SECT | PMD_SECT_SUPER | PMD_SECT_AP_WRITE |
- PMD_DOMAIN(DOMAIN_IO) |
- (flags & (L_PTE_CACHEABLE | L_PTE_BUFFERABLE));
-
- /*
- * ARMv6 and above need XN set to prevent speculative prefetches
- * hitting IO.
- */
- if (cpu_architecture() >= CPU_ARCH_ARMv6)
- prot |= PMD_SECT_XN;
-
pgd = pgd_offset_k(virt);
do {
unsigned long super_pmd_val, i;
- super_pmd_val = __pfn_to_phys(pfn) | prot;
+ super_pmd_val = __pfn_to_phys(pfn) | type->prot_sect |
+ PMD_SECT_SUPER;
super_pmd_val |= ((pfn >> (32 - PAGE_SHIFT)) & 0xf) << 20;
for (i = 0; i < 8; i++) {
@@ -279,9 +262,10 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
* mapping. See include/asm-arm/proc-armv/pgtable.h for more information.
*/
void __iomem *
-__ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
- unsigned long flags)
+__arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
+ unsigned int mtype)
{
+ const struct mem_type *type;
int err;
unsigned long addr;
struct vm_struct * area;
@@ -292,6 +276,10 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
return NULL;
+ type = get_mem_type(mtype);
+ if (!type)
+ return NULL;
+
size = PAGE_ALIGN(size);
area = get_vm_area(size, VM_IOREMAP);
@@ -302,16 +290,16 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
#ifndef CONFIG_SMP
if (DOMAIN_IO == 0 &&
(((cpu_architecture() >= CPU_ARCH_ARMv6) && (get_cr() & CR_XP)) ||
- cpu_is_xsc3()) &&
+ cpu_is_xsc3()) && pfn >= 0x100000 &&
!((__pfn_to_phys(pfn) | size | addr) & ~SUPERSECTION_MASK)) {
area->flags |= VM_ARM_SECTION_MAPPING;
- err = remap_area_supersections(addr, pfn, size, flags);
+ err = remap_area_supersections(addr, pfn, size, type);
} else if (!((__pfn_to_phys(pfn) | size | addr) & ~PMD_MASK)) {
area->flags |= VM_ARM_SECTION_MAPPING;
- err = remap_area_sections(addr, pfn, size, flags);
+ err = remap_area_sections(addr, pfn, size, type);
} else
#endif
- err = remap_area_pages(addr, pfn, size, flags);
+ err = remap_area_pages(addr, pfn, size, type);
if (err) {
vunmap((void *)addr);
@@ -321,10 +309,10 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
flush_cache_vmap(addr, addr + size);
return (void __iomem *) (offset + addr);
}
-EXPORT_SYMBOL(__ioremap_pfn);
+EXPORT_SYMBOL(__arm_ioremap_pfn);
void __iomem *
-__ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
+__arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
{
unsigned long last_addr;
unsigned long offset = phys_addr & ~PAGE_MASK;
@@ -342,9 +330,9 @@ __ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
*/
size = PAGE_ALIGN(last_addr + 1) - phys_addr;
- return __ioremap_pfn(pfn, offset, size, flags);
+ return __arm_ioremap_pfn(pfn, offset, size, mtype);
}
-EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(__arm_ioremap);
void __iounmap(volatile void __iomem *addr)
{
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.