ARM: pgtable: add pud-level code
Add pud_offset() et.al. between the pgd and pmd code in preparation of
using pgtable-nopud.h rather than 4level-fixup.h.
This incorporates a fix from Jamie Iles <jamie@jamieiles.com> for
uaccess_with_memcpy.c.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 1767490..82ef696 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -550,11 +550,11 @@
} while (pte++, addr += PAGE_SIZE, addr != end);
}
-static void __init alloc_init_section(pgd_t *pgd, unsigned long addr,
+static void __init alloc_init_section(pud_t *pud, unsigned long addr,
unsigned long end, phys_addr_t phys,
const struct mem_type *type)
{
- pmd_t *pmd = pmd_offset(pgd, addr);
+ pmd_t *pmd = pmd_offset(pud, addr);
/*
* Try a section mapping - end, addr and phys must all be aligned
@@ -583,6 +583,19 @@
}
}
+static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
+ unsigned long phys, const struct mem_type *type)
+{
+ pud_t *pud = pud_offset(pgd, addr);
+ unsigned long next;
+
+ do {
+ next = pud_addr_end(addr, end);
+ alloc_init_section(pud, addr, next, phys, type);
+ phys += next - addr;
+ } while (pud++, addr = next, addr != end);
+}
+
static void __init create_36bit_mapping(struct map_desc *md,
const struct mem_type *type)
{
@@ -630,7 +643,8 @@
pgd = pgd_offset_k(addr);
end = addr + length;
do {
- pmd_t *pmd = pmd_offset(pgd, addr);
+ pud_t *pud = pud_offset(pgd, addr);
+ pmd_t *pmd = pmd_offset(pud, addr);
int i;
for (i = 0; i < 16; i++)
@@ -696,7 +710,7 @@
do {
unsigned long next = pgd_addr_end(addr, end);
- alloc_init_section(pgd, addr, next, phys, type);
+ alloc_init_pud(pgd, addr, next, phys, type);
phys += next - addr;
addr = next;