diff options
Diffstat (limited to 'arch/sh/mm/pmb.c')
| -rw-r--r-- | arch/sh/mm/pmb.c | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 75b8861ec62..30035caeb73 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -24,6 +24,7 @@ #include <linux/io.h> #include <linux/spinlock.h> #include <linux/vmalloc.h> +#include <asm/cacheflush.h> #include <asm/sizes.h> #include <asm/system.h> #include <asm/uaccess.h> @@ -292,9 +293,18 @@ static void pmb_free(struct pmb_entry *pmbe) */ static void __set_pmb_entry(struct pmb_entry *pmbe) { + unsigned long addr, data; + + addr = mk_pmb_addr(pmbe->entry); + data = mk_pmb_data(pmbe->entry); + + jump_to_uncached(); + /* Set V-bit */ - __raw_writel(pmbe->ppn | pmbe->flags | PMB_V, mk_pmb_data(pmbe->entry)); - __raw_writel(pmbe->vpn | PMB_V, mk_pmb_addr(pmbe->entry)); + __raw_writel(pmbe->vpn | PMB_V, addr); + __raw_writel(pmbe->ppn | pmbe->flags | PMB_V, data); + + back_to_cached(); } static void __clear_pmb_entry(struct pmb_entry *pmbe) @@ -326,6 +336,7 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys, unsigned long size, pgprot_t prot) { struct pmb_entry *pmbp, *pmbe; + unsigned long orig_addr, orig_size; unsigned long flags, pmb_flags; int i, mapped; @@ -334,6 +345,11 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys, if (pmb_mapping_exists(vaddr, phys, size)) return 0; + orig_addr = vaddr; + orig_size = size; + + flush_tlb_kernel_range(vaddr, vaddr + size); + pmb_flags = pgprot_to_pmb_flags(prot); pmbp = NULL; @@ -383,13 +399,15 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys, } } while (size >= SZ_16M); + flush_cache_vmap(orig_addr, orig_addr + orig_size); + return 0; } void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size, pgprot_t prot, void *caller) { - unsigned long orig_addr, vaddr; + unsigned long vaddr; phys_addr_t offset, last_addr; phys_addr_t align_mask; unsigned long aligned; @@ -417,19 +435,24 @@ void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size, phys &= align_mask; aligned = ALIGN(last_addr, pmb_sizes[i].size) - phys; - area = __get_vm_area_caller(aligned, VM_IOREMAP, uncached_end, + /* + * XXX: This should really start from uncached_end, but this + * causes the MMU to reset, so for now we restrict it to the + * 0xb000...0xc000 range. + */ + area = __get_vm_area_caller(aligned, VM_IOREMAP, 0xb0000000, P3SEG, caller); if (!area) return NULL; area->phys_addr = phys; - orig_addr = vaddr = (unsigned long)area->addr; + vaddr = (unsigned long)area->addr; ret = pmb_bolt_mapping(vaddr, phys, size, prot); if (unlikely(ret != 0)) return ERR_PTR(ret); - return (void __iomem *)(offset + (char *)orig_addr); + return (void __iomem *)(offset + (char *)vaddr); } int pmb_unmap(void __iomem *addr) @@ -477,6 +500,8 @@ static void __pmb_unmap_entry(struct pmb_entry *pmbe, int depth) */ __clear_pmb_entry(pmbe); + flush_cache_vunmap(pmbe->vpn, pmbe->vpn + pmbe->size); + pmbe = pmblink->link; pmb_free(pmblink); |