From: David S. Miller Date: Mon, 28 Nov 2005 22:02:10 +0000 (-0800) Subject: [PATCH] sparc: convert IO remapping to VM_PFNMAP X-Git-Tag: v2.6.15-rc3~32 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=5cd9194a1b0b0fa219c31421ac64dfd38670ed49;p=linux-2.6-omap-h63xx.git [PATCH] sparc: convert IO remapping to VM_PFNMAP Here are the Sparc bits. Signed-off-by: Linus Torvalds --- diff --git a/arch/sparc/mm/generic.c b/arch/sparc/mm/generic.c index 0410bae681f..2cb0728cee0 100644 --- a/arch/sparc/mm/generic.c +++ b/arch/sparc/mm/generic.c @@ -32,9 +32,7 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte, unsigne if (end > PMD_SIZE) end = PMD_SIZE; do { - pte_t oldpage = *pte; - pte_clear(mm, address, pte); - set_pte(pte, mk_pte_io(offset, prot, space)); + set_pte_at(mm, address, pte, mk_pte_io(offset, prot, space)); address += PAGE_SIZE; offset += PAGE_SIZE; pte++; @@ -63,7 +61,7 @@ static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned } int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, - unsigned long pfn, unsigned long size, pgprot_t prot) + unsigned long pfn, unsigned long size, pgprot_t prot) { int error = 0; pgd_t * dir; @@ -74,7 +72,9 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; /* See comment in mm/memory.c remap_pfn_range */ - vma->vm_flags |= VM_IO | VM_RESERVED | VM_UNPAGED; + vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; + vma->vm_pgoff = (offset >> PAGE_SHIFT) | + ((unsigned long)space << 28UL); prot = __pgprot(pg_iobits); offset -= from; diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c index 8fd4cb1f050..d9396c1721c 100644 --- a/arch/sparc64/mm/generic.c +++ b/arch/sparc64/mm/generic.c @@ -15,6 +15,15 @@ #include #include +static inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space) +{ + pte_t pte; + pte_val(pte) = (((page) | pgprot_val(prot) | _PAGE_E) & + ~(unsigned long)_PAGE_CACHE); + pte_val(pte) |= (((unsigned long)space) << 32); + return pte; +} + /* Remap IO memory, the same way as remap_pfn_range(), but use * the obio memory space. * @@ -126,9 +135,13 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, struct mm_struct *mm = vma->vm_mm; int space = GET_IOSPACE(pfn); unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; + unsigned long phys_base; + + phys_base = offset | (((unsigned long) space) << 32UL); /* See comment in mm/memory.c remap_pfn_range */ - vma->vm_flags |= VM_IO | VM_RESERVED | VM_UNPAGED; + vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; + vma->vm_pgoff = phys_base >> PAGE_SHIFT; prot = __pgprot(pg_iobits); offset -= from; diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h index 9a02879b235..f0a9b44d3eb 100644 --- a/include/asm-sparc64/pgtable.h +++ b/include/asm-sparc64/pgtable.h @@ -348,16 +348,6 @@ extern unsigned long find_ecache_flush_span(unsigned long size); struct vm_area_struct; extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); -/* Make a non-present pseudo-TTE. */ -static inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space) -{ - pte_t pte; - pte_val(pte) = (((page) | pgprot_val(prot) | _PAGE_E) & - ~(unsigned long)_PAGE_CACHE); - pte_val(pte) |= (((unsigned long)space) << 32); - return pte; -} - /* Encode and de-code a swap entry */ #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))