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[ARM] mm 2: clean up create_mapping() 

There's now no need to carry around each protection separately.
Instead, pass around the pointer to the entry in the mem_types
array which we're interested in.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-04-21 10:05:32 +01:00 committed by Russell King
parent 2497f0a812
commit d5c98176ef
1 changed files with 13 additions and 17 deletions
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30
arch/arm/mm/mmu.c
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@ -420,7 +420,7 @@ alloc_init_supersection(unsigned long virt, unsigned long phys, int prot)
* the hardware pte table.
*/
static inline void
alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pgprot_t prot)
alloc_init_page(unsigned long virt, unsigned long phys, const struct mem_type *type)
{
pmd_t *pmdp = pmd_off_k(virt);
pte_t *ptep;
@ -429,11 +429,11 @@ alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pg
ptep = alloc_bootmem_low_pages(2 * PTRS_PER_PTE *
sizeof(pte_t));
__pmd_populate(pmdp, __pa(ptep) | prot_l1);
__pmd_populate(pmdp, __pa(ptep) | type->prot_l1);
}
ptep = pte_offset_kernel(pmdp, virt);
set_pte_ext(ptep, pfn_pte(phys >> PAGE_SHIFT, prot), 0);
set_pte_ext(ptep, pfn_pte(phys >> PAGE_SHIFT, __pgprot(type->prot_pte)), 0);
}
/*
@ -446,9 +446,8 @@ alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pg
void __init create_mapping(struct map_desc *md)
{
unsigned long virt, length;
int prot_sect, prot_l1, domain;
pgprot_t prot_pte;
unsigned long off = (u32)__pfn_to_phys(md->pfn);
const struct mem_type *type;
if (md->virtual != vectors_base() && md->virtual < TASK_SIZE) {
printk(KERN_WARNING "BUG: not creating mapping for "
@ -464,16 +463,13 @@ void __init create_mapping(struct map_desc *md)
__pfn_to_phys((u64)md->pfn), md->virtual);
}
domain = mem_types[md->type].domain;
prot_pte = __pgprot(mem_types[md->type].prot_pte);
prot_l1 = mem_types[md->type].prot_l1;
prot_sect = mem_types[md->type].prot_sect;
type = &mem_types[md->type];
/*
* Catch 36-bit addresses
*/
if(md->pfn >= 0x100000) {
if(domain) {
if (type->domain) {
printk(KERN_ERR "MM: invalid domain in supersection "
"mapping for 0x%08llx at 0x%08lx\n",
__pfn_to_phys((u64)md->pfn), md->virtual);
@ -498,7 +494,7 @@ void __init create_mapping(struct map_desc *md)
off -= virt;
length = md->length;
if (mem_types[md->type].prot_l1 == 0 &&
if (type->prot_l1 == 0 &&
(virt & 0xfffff || (virt + off) & 0xfffff || (virt + length) & 0xfffff)) {
printk(KERN_WARNING "BUG: map for 0x%08lx at 0x%08lx can not "
"be mapped using pages, ignoring.\n",
@ -507,7 +503,7 @@ void __init create_mapping(struct map_desc *md)
}
while ((virt & 0xfffff || (virt + off) & 0xfffff) && length >= PAGE_SIZE) {
alloc_init_page(virt, virt + off, prot_l1, prot_pte);
alloc_init_page(virt, virt + off, type);
virt += PAGE_SIZE;
length -= PAGE_SIZE;
@ -520,7 +516,7 @@ void __init create_mapping(struct map_desc *md)
* of the actual domain assignments in use.
*/
if ((cpu_architecture() >= CPU_ARCH_ARMv6 || cpu_is_xsc3())
&& domain == 0) {
&& type->domain == 0) {
/*
* Align to supersection boundary if !high pages.
* High pages have already been checked for proper
@ -532,7 +528,7 @@ void __init create_mapping(struct map_desc *md)
while ((virt & ~SUPERSECTION_MASK ||
(virt + off) & ~SUPERSECTION_MASK) &&
length >= (PGDIR_SIZE / 2)) {
alloc_init_section(virt, virt + off, prot_sect);
alloc_init_section(virt, virt + off, type->prot_sect);
virt += (PGDIR_SIZE / 2);
length -= (PGDIR_SIZE / 2);
@ -540,7 +536,7 @@ void __init create_mapping(struct map_desc *md)
}
while (length >= SUPERSECTION_SIZE) {
alloc_init_supersection(virt, virt + off, prot_sect);
alloc_init_supersection(virt, virt + off, type->prot_sect);
virt += SUPERSECTION_SIZE;
length -= SUPERSECTION_SIZE;
@ -551,14 +547,14 @@ void __init create_mapping(struct map_desc *md)
* A section mapping covers half a "pgdir" entry.
*/
while (length >= (PGDIR_SIZE / 2)) {
alloc_init_section(virt, virt + off, prot_sect);
alloc_init_section(virt, virt + off, type->prot_sect);
virt += (PGDIR_SIZE / 2);
length -= (PGDIR_SIZE / 2);
}
while (length >= PAGE_SIZE) {
alloc_init_page(virt, virt + off, prot_l1, prot_pte);
alloc_init_page(virt, virt + off, type);
virt += PAGE_SIZE;
length -= PAGE_SIZE;