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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-12-08 18:02:04 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-12-08 18:02:04 +0000
commit6ae25a5b9d7ba86d6ac19c403dfa57dae6caa73d (patch)
tree41d04269f268d6162e5f1866496dd42fbc79d2a4 /arch/arm/mm/ioremap.c
parent3ee0fc5ca129cbae81c073756febcb1c552af446 (diff)
parent497b7e943d0dc5743454de56dcdb67352bbf96b2 (diff)
Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux into devel-stable
Conflicts: arch/arm/mm/ioremap.c
Diffstat (limited to 'arch/arm/mm/ioremap.c')
-rw-r--r--arch/arm/mm/ioremap.c39
1 files changed, 24 insertions, 15 deletions
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 12c7ad215ce..80632e8d753 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -58,7 +58,7 @@ void __check_kvm_seq(struct mm_struct *mm)
} while (seq != init_mm.context.kvm_seq);
}
-#ifndef CONFIG_SMP
+#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
/*
* Section support is unsafe on SMP - If you iounmap and ioremap a region,
* the other CPUs will not see this change until their next context switch.
@@ -73,13 +73,16 @@ static void unmap_area_sections(unsigned long virt, unsigned long size)
{
unsigned long addr = virt, end = virt + (size & ~(SZ_1M - 1));
pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmdp;
flush_cache_vunmap(addr, end);
pgd = pgd_offset_k(addr);
+ pud = pud_offset(pgd, addr);
+ pmdp = pmd_offset(pud, addr);
do {
- pmd_t pmd, *pmdp = pmd_offset(pgd, addr);
+ pmd_t pmd = *pmdp;
- pmd = *pmdp;
if (!pmd_none(pmd)) {
/*
* Clear the PMD from the page table, and
@@ -98,8 +101,8 @@ static void unmap_area_sections(unsigned long virt, unsigned long size)
pte_free_kernel(&init_mm, pmd_page_vaddr(pmd));
}
- addr += PGDIR_SIZE;
- pgd++;
+ addr += PMD_SIZE;
+ pmdp += 2;
} while (addr < end);
/*
@@ -118,6 +121,8 @@ remap_area_sections(unsigned long virt, unsigned long pfn,
{
unsigned long addr = virt, end = virt + size;
pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
/*
* Remove and free any PTE-based mapping, and
@@ -126,17 +131,17 @@ remap_area_sections(unsigned long virt, unsigned long pfn,
unmap_area_sections(virt, size);
pgd = pgd_offset_k(addr);
+ pud = pud_offset(pgd, addr);
+ pmd = pmd_offset(pud, addr);
do {
- pmd_t *pmd = pmd_offset(pgd, addr);
-
pmd[0] = __pmd(__pfn_to_phys(pfn) | type->prot_sect);
pfn += SZ_1M >> PAGE_SHIFT;
pmd[1] = __pmd(__pfn_to_phys(pfn) | type->prot_sect);
pfn += SZ_1M >> PAGE_SHIFT;
flush_pmd_entry(pmd);
- addr += PGDIR_SIZE;
- pgd++;
+ addr += PMD_SIZE;
+ pmd += 2;
} while (addr < end);
return 0;
@@ -148,6 +153,8 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
{
unsigned long addr = virt, end = virt + size;
pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
/*
* Remove and free any PTE-based mapping, and
@@ -156,6 +163,8 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
unmap_area_sections(virt, size);
pgd = pgd_offset_k(virt);
+ pud = pud_offset(pgd, addr);
+ pmd = pmd_offset(pud, addr);
do {
unsigned long super_pmd_val, i;
@@ -164,14 +173,12 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
super_pmd_val |= ((pfn >> (32 - PAGE_SHIFT)) & 0xf) << 20;
for (i = 0; i < 8; i++) {
- pmd_t *pmd = pmd_offset(pgd, addr);
-
pmd[0] = __pmd(super_pmd_val);
pmd[1] = __pmd(super_pmd_val);
flush_pmd_entry(pmd);
- addr += PGDIR_SIZE;
- pgd++;
+ addr += PMD_SIZE;
+ pmd += 2;
}
pfn += SUPERSECTION_SIZE >> PAGE_SHIFT;
@@ -189,11 +196,13 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
unsigned long addr;
struct vm_struct * area;
+#ifndef CONFIG_ARM_LPAE
/*
* High mappings must be supersection aligned
*/
if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
return NULL;
+#endif
type = get_mem_type(mtype);
if (!type)
@@ -237,7 +246,7 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
return NULL;
addr = (unsigned long)area->addr;
-#ifndef CONFIG_SMP
+#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
if (DOMAIN_IO == 0 &&
(((cpu_architecture() >= CPU_ARCH_ARMv6) && (get_cr() & CR_XP)) ||
cpu_is_xsc3()) && pfn >= 0x100000 &&
@@ -343,7 +352,7 @@ void __iounmap(volatile void __iomem *io_addr)
read_unlock(&vmlist_lock);
return;
}
-#ifndef CONFIG_SMP
+#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
/*
* If this is a section based mapping we need to handle it
* specially as the VM subsystem does not know how to handle