[PATCH] ppc64: update to use the new 4L headers
This patch converts ppc64 to use the generic pgtable-nopud.h instead of the "fixup" header. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Benjamin Herrenschmidt
Linus Torvalds
parent
0339ad77c4
commit
58366af586
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@ -42,7 +42,7 @@ static inline int hugepgd_index(unsigned long addr)
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return (addr & ~REGION_MASK) >> HUGEPGDIR_SHIFT;
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}
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static pgd_t *hugepgd_offset(struct mm_struct *mm, unsigned long addr)
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static pud_t *hugepgd_offset(struct mm_struct *mm, unsigned long addr)
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{
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int index;
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@ -52,21 +52,21 @@ static pgd_t *hugepgd_offset(struct mm_struct *mm, unsigned long addr)
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index = hugepgd_index(addr);
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BUG_ON(index >= PTRS_PER_HUGEPGD);
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return mm->context.huge_pgdir + index;
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return (pud_t *)(mm->context.huge_pgdir + index);
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}
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static inline pte_t *hugepte_offset(pgd_t *dir, unsigned long addr)
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static inline pte_t *hugepte_offset(pud_t *dir, unsigned long addr)
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{
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int index;
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if (pgd_none(*dir))
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if (pud_none(*dir))
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return NULL;
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index = (addr >> HPAGE_SHIFT) % PTRS_PER_HUGEPTE;
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return (pte_t *)pgd_page(*dir) + index;
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return (pte_t *)pud_page(*dir) + index;
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}
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static pgd_t *hugepgd_alloc(struct mm_struct *mm, unsigned long addr)
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static pud_t *hugepgd_alloc(struct mm_struct *mm, unsigned long addr)
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{
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BUG_ON(! in_hugepage_area(mm->context, addr));
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@ -90,10 +90,9 @@ static pgd_t *hugepgd_alloc(struct mm_struct *mm, unsigned long addr)
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return hugepgd_offset(mm, addr);
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}
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static pte_t *hugepte_alloc(struct mm_struct *mm, pgd_t *dir,
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unsigned long addr)
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static pte_t *hugepte_alloc(struct mm_struct *mm, pud_t *dir, unsigned long addr)
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{
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if (! pgd_present(*dir)) {
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if (! pud_present(*dir)) {
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pte_t *new;
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spin_unlock(&mm->page_table_lock);
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@ -104,7 +103,7 @@ static pte_t *hugepte_alloc(struct mm_struct *mm, pgd_t *dir,
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* Because we dropped the lock, we should re-check the
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* entry, as somebody else could have populated it..
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*/
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if (pgd_present(*dir)) {
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if (pud_present(*dir)) {
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if (new)
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kmem_cache_free(zero_cache, new);
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} else {
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@ -115,7 +114,7 @@ static pte_t *hugepte_alloc(struct mm_struct *mm, pgd_t *dir,
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ptepage = virt_to_page(new);
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ptepage->mapping = (void *) mm;
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ptepage->index = addr & HUGEPGDIR_MASK;
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pgd_populate(mm, dir, new);
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pud_populate(mm, dir, new);
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}
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}
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@ -124,28 +123,28 @@ static pte_t *hugepte_alloc(struct mm_struct *mm, pgd_t *dir,
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static pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
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{
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pgd_t *pgd;
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pud_t *pud;
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BUG_ON(! in_hugepage_area(mm->context, addr));
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pgd = hugepgd_offset(mm, addr);
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if (! pgd)
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pud = hugepgd_offset(mm, addr);
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if (! pud)
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return NULL;
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return hugepte_offset(pgd, addr);
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return hugepte_offset(pud, addr);
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}
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static pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
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{
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pgd_t *pgd;
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pud_t *pud;
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BUG_ON(! in_hugepage_area(mm->context, addr));
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pgd = hugepgd_alloc(mm, addr);
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if (! pgd)
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pud = hugepgd_alloc(mm, addr);
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if (! pud)
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return NULL;
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return hugepte_alloc(mm, pgd, addr);
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return hugepte_alloc(mm, pud, addr);
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}
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static void set_huge_pte(struct mm_struct *mm, struct vm_area_struct *vma,
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@ -709,10 +708,10 @@ void hugetlb_mm_free_pgd(struct mm_struct *mm)
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/* cleanup any hugepte pages leftover */
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for (i = 0; i < PTRS_PER_HUGEPGD; i++) {
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pgd_t *pgd = pgdir + i;
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pud_t *pud = (pud_t *)(pgdir + i);
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if (! pgd_none(*pgd)) {
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pte_t *pte = (pte_t *)pgd_page(*pgd);
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if (! pud_none(*pud)) {
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pte_t *pte = (pte_t *)pud_page(*pud);
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struct page *ptepage = virt_to_page(pte);
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ptepage->mapping = NULL;
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@ -720,7 +719,7 @@ void hugetlb_mm_free_pgd(struct mm_struct *mm)
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BUG_ON(memcmp(pte, empty_zero_page, PAGE_SIZE));
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kmem_cache_free(zero_cache, pte);
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}
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pgd_clear(pgd);
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pud_clear(pud);
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}
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BUG_ON(memcmp(pgdir, empty_zero_page, PAGE_SIZE));
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@ -136,14 +136,78 @@ void iounmap(volatile void __iomem *addr)
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#else
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static void unmap_im_area_pte(pmd_t *pmd, unsigned long addr,
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unsigned long end)
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{
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pte_t *pte;
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pte = pte_offset_kernel(pmd, addr);
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do {
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pte_t ptent = ptep_get_and_clear(&ioremap_mm, addr, pte);
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WARN_ON(!pte_none(ptent) && !pte_present(ptent));
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} while (pte++, addr += PAGE_SIZE, addr != end);
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}
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static inline void unmap_im_area_pmd(pud_t *pud, unsigned long addr,
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unsigned long end)
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{
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pmd_t *pmd;
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unsigned long next;
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pmd = pmd_offset(pud, addr);
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do {
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next = pmd_addr_end(addr, end);
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if (pmd_none_or_clear_bad(pmd))
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continue;
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unmap_im_area_pte(pmd, addr, next);
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} while (pmd++, addr = next, addr != end);
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}
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static inline void unmap_im_area_pud(pgd_t *pgd, unsigned long addr,
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unsigned long end)
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{
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pud_t *pud;
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unsigned long next;
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pud = pud_offset(pgd, addr);
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do {
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next = pud_addr_end(addr, end);
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if (pud_none_or_clear_bad(pud))
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continue;
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unmap_im_area_pmd(pud, addr, next);
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} while (pud++, addr = next, addr != end);
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}
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static void unmap_im_area(unsigned long addr, unsigned long end)
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{
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struct mm_struct *mm = &ioremap_mm;
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unsigned long next;
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pgd_t *pgd;
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spin_lock(&mm->page_table_lock);
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pgd = pgd_offset_i(addr);
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flush_cache_vunmap(addr, end);
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do {
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next = pgd_addr_end(addr, end);
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if (pgd_none_or_clear_bad(pgd))
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continue;
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unmap_im_area_pud(pgd, addr, next);
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} while (pgd++, addr = next, addr != end);
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flush_tlb_kernel_range(start, end);
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spin_unlock(&mm->page_table_lock);
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}
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/*
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* map_io_page currently only called by __ioremap
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* map_io_page adds an entry to the ioremap page table
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* and adds an entry to the HPT, possibly bolting it
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*/
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static void map_io_page(unsigned long ea, unsigned long pa, int flags)
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static int map_io_page(unsigned long ea, unsigned long pa, int flags)
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{
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pgd_t *pgdp;
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pud_t *pudp;
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pmd_t *pmdp;
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pte_t *ptep;
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unsigned long vsid;
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@ -151,9 +215,15 @@ static void map_io_page(unsigned long ea, unsigned long pa, int flags)
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if (mem_init_done) {
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spin_lock(&ioremap_mm.page_table_lock);
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pgdp = pgd_offset_i(ea);
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pmdp = pmd_alloc(&ioremap_mm, pgdp, ea);
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pudp = pud_alloc(&ioremap_mm, pgdp, ea);
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if (!pudp)
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return -ENOMEM;
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pmdp = pmd_alloc(&ioremap_mm, pudp, ea);
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if (!pmdp)
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return -ENOMEM;
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ptep = pte_alloc_kernel(&ioremap_mm, pmdp, ea);
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if (!ptep)
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return -ENOMEM;
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pa = abs_to_phys(pa);
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set_pte_at(&ioremap_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT,
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__pgprot(flags)));
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@ -181,6 +251,7 @@ static void map_io_page(unsigned long ea, unsigned long pa, int flags)
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panic("map_io_page: could not insert mapping");
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}
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}
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return 0;
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}
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@ -194,9 +265,14 @@ static void __iomem * __ioremap_com(unsigned long addr, unsigned long pa,
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flags |= pgprot_val(PAGE_KERNEL);
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for (i = 0; i < size; i += PAGE_SIZE)
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map_io_page(ea+i, pa+i, flags);
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if (map_io_page(ea+i, pa+i, flags))
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goto failure;
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return (void __iomem *) (ea + (addr & ~PAGE_MASK));
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failure:
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if (mem_init_done)
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unmap_im_area(ea, ea + size);
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return NULL;
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}
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@ -206,10 +282,11 @@ ioremap(unsigned long addr, unsigned long size)
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return __ioremap(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED);
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}
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void __iomem *
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__ioremap(unsigned long addr, unsigned long size, unsigned long flags)
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void __iomem * __ioremap(unsigned long addr, unsigned long size,
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unsigned long flags)
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{
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unsigned long pa, ea;
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void __iomem *ret;
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/*
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* Choose an address to map it to.
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@ -232,12 +309,16 @@ __ioremap(unsigned long addr, unsigned long size, unsigned long flags)
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if (area == NULL)
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return NULL;
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ea = (unsigned long)(area->addr);
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ret = __ioremap_com(addr, pa, ea, size, flags);
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if (!ret)
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im_free(area->addr);
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} else {
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ea = ioremap_bot;
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ioremap_bot += size;
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ret = __ioremap_com(addr, pa, ea, size, flags);
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if (ret)
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ioremap_bot += size;
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}
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return __ioremap_com(addr, pa, ea, size, flags);
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return ret;
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}
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#define IS_PAGE_ALIGNED(_val) ((_val) == ((_val) & PAGE_MASK))
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@ -246,6 +327,7 @@ int __ioremap_explicit(unsigned long pa, unsigned long ea,
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unsigned long size, unsigned long flags)
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{
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struct vm_struct *area;
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void __iomem *ret;
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/* For now, require page-aligned values for pa, ea, and size */
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if (!IS_PAGE_ALIGNED(pa) || !IS_PAGE_ALIGNED(ea) ||
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@ -276,7 +358,12 @@ int __ioremap_explicit(unsigned long pa, unsigned long ea,
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}
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}
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if (__ioremap_com(pa, pa, ea, size, flags) != (void *) ea) {
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ret = __ioremap_com(pa, pa, ea, size, flags);
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if (ret == NULL) {
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printk(KERN_ERR "ioremap_explicit() allocation failure !\n");
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return 1;
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}
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if (ret != (void *) ea) {
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printk(KERN_ERR "__ioremap_com() returned unexpected addr\n");
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return 1;
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}
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@ -284,69 +371,6 @@ int __ioremap_explicit(unsigned long pa, unsigned long ea,
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return 0;
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}
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static void unmap_im_area_pte(pmd_t *pmd, unsigned long address,
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unsigned long size)
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{
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unsigned long base, end;
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pte_t *pte;
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if (pmd_none(*pmd))
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return;
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if (pmd_bad(*pmd)) {
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pmd_ERROR(*pmd);
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pmd_clear(pmd);
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return;
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}
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pte = pte_offset_kernel(pmd, address);
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base = address & PMD_MASK;
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address &= ~PMD_MASK;
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end = address + size;
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if (end > PMD_SIZE)
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end = PMD_SIZE;
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do {
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pte_t page;
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page = ptep_get_and_clear(&ioremap_mm, base + address, pte);
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address += PAGE_SIZE;
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pte++;
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if (pte_none(page))
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continue;
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if (pte_present(page))
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continue;
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printk(KERN_CRIT "Whee.. Swapped out page in kernel page"
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" table\n");
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} while (address < end);
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}
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static void unmap_im_area_pmd(pgd_t *dir, unsigned long address,
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unsigned long size)
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{
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unsigned long base, end;
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pmd_t *pmd;
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if (pgd_none(*dir))
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return;
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if (pgd_bad(*dir)) {
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pgd_ERROR(*dir);
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pgd_clear(dir);
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return;
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}
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pmd = pmd_offset(dir, address);
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base = address & PGDIR_MASK;
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address &= ~PGDIR_MASK;
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end = address + size;
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if (end > PGDIR_SIZE)
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end = PGDIR_SIZE;
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do {
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unmap_im_area_pte(pmd, base + address, end - address);
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address = (address + PMD_SIZE) & PMD_MASK;
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pmd++;
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} while (address < end);
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}
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/*
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* Unmap an IO region and remove it from imalloc'd list.
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* Access to IO memory should be serialized by driver.
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@ -356,39 +380,19 @@ static void unmap_im_area_pmd(pgd_t *dir, unsigned long address,
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*/
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void iounmap(volatile void __iomem *token)
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{
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unsigned long address, start, end, size;
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struct mm_struct *mm;
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pgd_t *dir;
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unsigned long address, size;
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void *addr;
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if (!mem_init_done) {
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if (!mem_init_done)
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return;
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}
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addr = (void *) ((unsigned long __force) token & PAGE_MASK);
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if ((size = im_free(addr)) == 0) {
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if ((size = im_free(addr)) == 0)
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return;
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}
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address = (unsigned long)addr;
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start = address;
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end = address + size;
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mm = &ioremap_mm;
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spin_lock(&mm->page_table_lock);
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dir = pgd_offset_i(address);
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flush_cache_vunmap(address, end);
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do {
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unmap_im_area_pmd(dir, address, end - address);
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address = (address + PGDIR_SIZE) & PGDIR_MASK;
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dir++;
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} while (address && (address < end));
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flush_tlb_kernel_range(start, end);
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spin_unlock(&mm->page_table_lock);
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return;
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unmap_im_area(address, address + size);
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}
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static int iounmap_subset_regions(unsigned long addr, unsigned long size)
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@ -27,7 +27,7 @@ pgd_free(pgd_t *pgd)
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kmem_cache_free(zero_cache, pgd);
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}
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#define pgd_populate(MM, PGD, PMD) pgd_set(PGD, PMD)
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#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
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static inline pmd_t *
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pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
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@ -1,8 +1,6 @@
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#ifndef _PPC64_PGTABLE_H
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#define _PPC64_PGTABLE_H
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#include <asm-generic/4level-fixup.h>
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/*
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* This file contains the functions and defines necessary to modify and use
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* the ppc64 hashed page table.
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@ -17,6 +15,8 @@
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#include <asm/tlbflush.h>
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#endif /* __ASSEMBLY__ */
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#include <asm-generic/pgtable-nopud.h>
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/* PMD_SHIFT determines what a second-level page table entry can map */
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#define PMD_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
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#define PMD_SIZE (1UL << PMD_SHIFT)
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@ -228,12 +228,13 @@ void hugetlb_mm_free_pgd(struct mm_struct *mm);
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#define pmd_page_kernel(pmd) \
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(__bpn_to_ba(pmd_val(pmd) >> PMD_TO_PTEPAGE_SHIFT))
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#define pmd_page(pmd) virt_to_page(pmd_page_kernel(pmd))
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#define pgd_set(pgdp, pmdp) (pgd_val(*(pgdp)) = (__ba_to_bpn(pmdp)))
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#define pgd_none(pgd) (!pgd_val(pgd))
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#define pgd_bad(pgd) ((pgd_val(pgd)) == 0)
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#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
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#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL)
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#define pgd_page(pgd) (__bpn_to_ba(pgd_val(pgd)))
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#define pud_set(pudp, pmdp) (pud_val(*(pudp)) = (__ba_to_bpn(pmdp)))
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#define pud_none(pud) (!pud_val(pud))
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#define pud_bad(pud) ((pud_val(pud)) == 0UL)
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#define pud_present(pud) (pud_val(pud) != 0UL)
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#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
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#define pud_page(pud) (__bpn_to_ba(pud_val(pud)))
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||||
|
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/*
|
||||
* Find an entry in a page-table-directory. We combine the address region
|
||||
|
|
@ -245,12 +246,13 @@ void hugetlb_mm_free_pgd(struct mm_struct *mm);
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#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
|
||||
|
||||
/* Find an entry in the second-level page table.. */
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#define pmd_offset(dir,addr) \
|
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((pmd_t *) pgd_page(*(dir)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
|
||||
#define pmd_offset(pudp,addr) \
|
||||
((pmd_t *) pud_page(*(pudp)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
|
||||
|
||||
/* Find an entry in the third-level page table.. */
|
||||
#define pte_offset_kernel(dir,addr) \
|
||||
((pte_t *) pmd_page_kernel(*(dir)) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
|
||||
((pte_t *) pmd_page_kernel(*(dir)) \
|
||||
+ (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
|
||||
|
||||
#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
|
||||
#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
|
||||
|
|
@ -582,19 +584,22 @@ extern long native_hpte_insert(unsigned long hpte_group, unsigned long va,
|
|||
static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea)
|
||||
{
|
||||
pgd_t *pg;
|
||||
pud_t *pu;
|
||||
pmd_t *pm;
|
||||
pte_t *pt = NULL;
|
||||
pte_t pte;
|
||||
|
||||
pg = pgdir + pgd_index(ea);
|
||||
if (!pgd_none(*pg)) {
|
||||
|
||||
pm = pmd_offset(pg, ea);
|
||||
if (pmd_present(*pm)) {
|
||||
pt = pte_offset_kernel(pm, ea);
|
||||
pte = *pt;
|
||||
if (!pte_present(pte))
|
||||
pt = NULL;
|
||||
pu = pud_offset(pg, ea);
|
||||
if (!pud_none(*pu)) {
|
||||
pm = pmd_offset(pu, ea);
|
||||
if (pmd_present(*pm)) {
|
||||
pt = pte_offset_kernel(pm, ea);
|
||||
pte = *pt;
|
||||
if (!pte_present(pte))
|
||||
pt = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue