#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.
*/
#define VM_ARM_SECTION_MAPPING 0x80000000
-static inline void
-remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
- unsigned long phys_addr, pgprot_t pgprot)
+static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
+ unsigned long phys_addr, const struct mem_type *type)
{
- unsigned long end;
+ pgprot_t prot = __pgprot(type->prot_pte);
+ pte_t *pte;
+
+ pte = pte_alloc_kernel(pmd, addr);
+ if (!pte)
+ return -ENOMEM;
- address &= ~PMD_MASK;
- end = address + size;
- if (end > PMD_SIZE)
- end = PMD_SIZE;
- BUG_ON(address >= end);
do {
if (!pte_none(*pte))
goto bad;
- set_pte(pte, pfn_pte(phys_addr >> PAGE_SHIFT, pgprot));
- address += PAGE_SIZE;
+ set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot),
+ type->prot_pte_ext);
phys_addr += PAGE_SIZE;
- pte++;
- } while (address && (address < end));
- return;
+ } while (pte++, addr += PAGE_SIZE, addr != end);
+ return 0;
bad:
- printk("remap_area_pte: page already exists\n");
+ printk(KERN_CRIT "remap_area_pte: page already exists\n");
BUG();
}
-static inline int
-remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
- unsigned long phys_addr, unsigned long flags)
+static inline int remap_area_pmd(pgd_t *pgd, unsigned long addr,
+ unsigned long end, unsigned long phys_addr,
+ const struct mem_type *type)
{
- unsigned long end;
- pgprot_t pgprot;
-
- address &= ~PGDIR_MASK;
- end = address + size;
+ unsigned long next;
+ pmd_t *pmd;
+ int ret = 0;
- if (end > PGDIR_SIZE)
- end = PGDIR_SIZE;
+ pmd = pmd_alloc(&init_mm, pgd, addr);
+ if (!pmd)
+ return -ENOMEM;
- phys_addr -= address;
- BUG_ON(address >= end);
-
- pgprot = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | L_PTE_WRITE | flags);
do {
- pte_t * pte = pte_alloc_kernel(pmd, address);
- if (!pte)
- return -ENOMEM;
- remap_area_pte(pte, address, end - address, address + phys_addr, pgprot);
- address = (address + PMD_SIZE) & PMD_MASK;
- pmd++;
- } while (address && (address < end));
- return 0;
+ next = pmd_addr_end(addr, end);
+ ret = remap_area_pte(pmd, addr, next, phys_addr, type);
+ if (ret)
+ return ret;
+ phys_addr += next - addr;
+ } while (pmd++, addr = next, addr != end);
+ return ret;
}
-static int
-remap_area_pages(unsigned long start, unsigned long pfn,
- unsigned long size, unsigned long flags)
+static int remap_area_pages(unsigned long start, unsigned long pfn,
+ size_t size, const struct mem_type *type)
{
- unsigned long address = start;
- unsigned long end = start + size;
+ unsigned long addr = start;
+ unsigned long next, end = start + size;
unsigned long phys_addr = __pfn_to_phys(pfn);
+ pgd_t *pgd;
int err = 0;
- pgd_t * dir;
- phys_addr -= address;
- dir = pgd_offset(&init_mm, address);
- BUG_ON(address >= end);
+ BUG_ON(addr >= end);
+ pgd = pgd_offset_k(addr);
do {
- pmd_t *pmd = pmd_alloc(&init_mm, dir, address);
- if (!pmd) {
- err = -ENOMEM;
- break;
- }
- if (remap_area_pmd(pmd, address, end - address,
- phys_addr + address, flags)) {
- err = -ENOMEM;
+ next = pgd_addr_end(addr, end);
+ err = remap_area_pmd(pgd, addr, next, phys_addr, type);
+ if (err)
break;
- }
-
- address = (address + PGDIR_SIZE) & PGDIR_MASK;
- dir++;
- } while (address && (address < end));
+ phys_addr += next - addr;
+ } while (pgd++, addr = next, addr != end);
return err;
}
* Free the page table, if there was one.
*/
if ((pmd_val(pmd) & PMD_TYPE_MASK) == PMD_TYPE_TABLE)
- pte_free_kernel(pmd_page_vaddr(pmd));
+ pte_free_kernel(&init_mm, pmd_page_vaddr(pmd));
}
addr += PGDIR_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;
/*
*/
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);
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;
/*
*/
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++) {
* 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;
if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
return NULL;
+ type = get_mem_type(mtype);
+ if (!type)
+ return NULL;
+
+ /*
+ * Page align the mapping size, taking account of any offset.
+ */
+ size = PAGE_ALIGN(offset + size);
+
area = get_vm_area(size, VM_IOREMAP);
if (!area)
return NULL;
addr = (unsigned long)area->addr;
#ifndef CONFIG_SMP
- if ((((cpu_architecture() >= CPU_ARCH_ARMv6) && (get_cr() & CR_XP)) ||
- cpu_is_xsc3()) &&
+ if (DOMAIN_IO == 0 &&
+ (((cpu_architecture() >= CPU_ARCH_ARMv6) && (get_cr() & CR_XP)) ||
+ 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);
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;
if (!size || last_addr < phys_addr)
return NULL;
- /*
- * Page align the mapping size
- */
- 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(void __iomem *addr)
+void __iounmap(volatile void __iomem *addr)
{
#ifndef CONFIG_SMP
struct vm_struct **p, *tmp;
#endif
unsigned int section_mapping = 0;
- addr = (void __iomem *)(PAGE_MASK & (unsigned long)addr);
+ addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long)addr);
#ifndef CONFIG_SMP
/*
* If this is a section based mapping we need to handle it
- * specially as the VM subysystem does not know how to handle
+ * specially as the VM subsystem does not know how to handle
* such a beast. We need the lock here b/c we need to clear
* all the mappings before the area can be reclaimed
* by someone else.
#endif
if (!section_mapping)
- vunmap(addr);
+ vunmap((void __force *)addr);
}
EXPORT_SYMBOL(__iounmap);
git.openpandora.org / pandora-kernel.git / blobdiff