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Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/mm/pgtable_32.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/mm/pgtable_32.c456
1 files changed, 0 insertions, 456 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/mm/pgtable_32.c b/ANDROID_3.4.5/arch/powerpc/mm/pgtable_32.c
deleted file mode 100644
index 6c856fb8..00000000
--- a/ANDROID_3.4.5/arch/powerpc/mm/pgtable_32.c
+++ /dev/null
@@ -1,456 +0,0 @@
-/*
- * This file contains the routines setting up the linux page tables.
- * -- paulus
- *
- * Derived from arch/ppc/mm/init.c:
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
- * and Cort Dougan (PReP) (cort@cs.nmt.edu)
- * Copyright (C) 1996 Paul Mackerras
- *
- * Derived from "arch/i386/mm/init.c"
- * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/highmem.h>
-#include <linux/memblock.h>
-#include <linux/slab.h>
-
-#include <asm/pgtable.h>
-#include <asm/pgalloc.h>
-#include <asm/fixmap.h>
-#include <asm/io.h>
-#include <asm/setup.h>
-
-#include "mmu_decl.h"
-
-unsigned long ioremap_base;
-unsigned long ioremap_bot;
-EXPORT_SYMBOL(ioremap_bot); /* aka VMALLOC_END */
-
-#if defined(CONFIG_6xx) || defined(CONFIG_POWER3)
-#define HAVE_BATS 1
-#endif
-
-#if defined(CONFIG_FSL_BOOKE)
-#define HAVE_TLBCAM 1
-#endif
-
-extern char etext[], _stext[];
-
-#ifdef HAVE_BATS
-extern phys_addr_t v_mapped_by_bats(unsigned long va);
-extern unsigned long p_mapped_by_bats(phys_addr_t pa);
-void setbat(int index, unsigned long virt, phys_addr_t phys,
- unsigned int size, int flags);
-
-#else /* !HAVE_BATS */
-#define v_mapped_by_bats(x) (0UL)
-#define p_mapped_by_bats(x) (0UL)
-#endif /* HAVE_BATS */
-
-#ifdef HAVE_TLBCAM
-extern unsigned int tlbcam_index;
-extern phys_addr_t v_mapped_by_tlbcam(unsigned long va);
-extern unsigned long p_mapped_by_tlbcam(phys_addr_t pa);
-#else /* !HAVE_TLBCAM */
-#define v_mapped_by_tlbcam(x) (0UL)
-#define p_mapped_by_tlbcam(x) (0UL)
-#endif /* HAVE_TLBCAM */
-
-#define PGDIR_ORDER (32 + PGD_T_LOG2 - PGDIR_SHIFT)
-
-pgd_t *pgd_alloc(struct mm_struct *mm)
-{
- pgd_t *ret;
-
- /* pgdir take page or two with 4K pages and a page fraction otherwise */
-#ifndef CONFIG_PPC_4K_PAGES
- ret = kzalloc(1 << PGDIR_ORDER, GFP_KERNEL);
-#else
- ret = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO,
- PGDIR_ORDER - PAGE_SHIFT);
-#endif
- return ret;
-}
-
-void pgd_free(struct mm_struct *mm, pgd_t *pgd)
-{
-#ifndef CONFIG_PPC_4K_PAGES
- kfree((void *)pgd);
-#else
- free_pages((unsigned long)pgd, PGDIR_ORDER - PAGE_SHIFT);
-#endif
-}
-
-__init_refok pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
-{
- pte_t *pte;
- extern int mem_init_done;
- extern void *early_get_page(void);
-
- if (mem_init_done) {
- pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
- } else {
- pte = (pte_t *)early_get_page();
- if (pte)
- clear_page(pte);
- }
- return pte;
-}
-
-pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
-{
- struct page *ptepage;
-
- gfp_t flags = GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO;
-
- ptepage = alloc_pages(flags, 0);
- if (!ptepage)
- return NULL;
- pgtable_page_ctor(ptepage);
- return ptepage;
-}
-
-void __iomem *
-ioremap(phys_addr_t addr, unsigned long size)
-{
- return __ioremap_caller(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED,
- __builtin_return_address(0));
-}
-EXPORT_SYMBOL(ioremap);
-
-void __iomem *
-ioremap_wc(phys_addr_t addr, unsigned long size)
-{
- return __ioremap_caller(addr, size, _PAGE_NO_CACHE,
- __builtin_return_address(0));
-}
-EXPORT_SYMBOL(ioremap_wc);
-
-void __iomem *
-ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
-{
- /* writeable implies dirty for kernel addresses */
- if (flags & _PAGE_RW)
- flags |= _PAGE_DIRTY | _PAGE_HWWRITE;
-
- /* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */
- flags &= ~(_PAGE_USER | _PAGE_EXEC);
-
-#ifdef _PAGE_BAP_SR
- /* _PAGE_USER contains _PAGE_BAP_SR on BookE using the new PTE format
- * which means that we just cleared supervisor access... oops ;-) This
- * restores it
- */
- flags |= _PAGE_BAP_SR;
-#endif
-
- return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
-}
-EXPORT_SYMBOL(ioremap_prot);
-
-void __iomem *
-__ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
-{
- return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
-}
-
-void __iomem *
-__ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
- void *caller)
-{
- unsigned long v, i;
- phys_addr_t p;
- int err;
-
- /* Make sure we have the base flags */
- if ((flags & _PAGE_PRESENT) == 0)
- flags |= PAGE_KERNEL;
-
- /* Non-cacheable page cannot be coherent */
- if (flags & _PAGE_NO_CACHE)
- flags &= ~_PAGE_COHERENT;
-
- /*
- * Choose an address to map it to.
- * Once the vmalloc system is running, we use it.
- * Before then, we use space going down from ioremap_base
- * (ioremap_bot records where we're up to).
- */
- p = addr & PAGE_MASK;
- size = PAGE_ALIGN(addr + size) - p;
-
- /*
- * If the address lies within the first 16 MB, assume it's in ISA
- * memory space
- */
- if (p < 16*1024*1024)
- p += _ISA_MEM_BASE;
-
-#ifndef CONFIG_CRASH_DUMP
- /*
- * Don't allow anybody to remap normal RAM that we're using.
- * mem_init() sets high_memory so only do the check after that.
- */
- if (mem_init_done && (p < virt_to_phys(high_memory)) &&
- !(__allow_ioremap_reserved && memblock_is_region_reserved(p, size))) {
- printk("__ioremap(): phys addr 0x%llx is RAM lr %pf\n",
- (unsigned long long)p, __builtin_return_address(0));
- return NULL;
- }
-#endif
-
- if (size == 0)
- return NULL;
-
- /*
- * Is it already mapped? Perhaps overlapped by a previous
- * BAT mapping. If the whole area is mapped then we're done,
- * otherwise remap it since we want to keep the virt addrs for
- * each request contiguous.
- *
- * We make the assumption here that if the bottom and top
- * of the range we want are mapped then it's mapped to the
- * same virt address (and this is contiguous).
- * -- Cort
- */
- if ((v = p_mapped_by_bats(p)) /*&& p_mapped_by_bats(p+size-1)*/ )
- goto out;
-
- if ((v = p_mapped_by_tlbcam(p)))
- goto out;
-
- if (mem_init_done) {
- struct vm_struct *area;
- area = get_vm_area_caller(size, VM_IOREMAP, caller);
- if (area == 0)
- return NULL;
- area->phys_addr = p;
- v = (unsigned long) area->addr;
- } else {
- v = (ioremap_bot -= size);
- }
-
- /*
- * Should check if it is a candidate for a BAT mapping
- */
-
- err = 0;
- for (i = 0; i < size && err == 0; i += PAGE_SIZE)
- err = map_page(v+i, p+i, flags);
- if (err) {
- if (mem_init_done)
- vunmap((void *)v);
- return NULL;
- }
-
-out:
- return (void __iomem *) (v + ((unsigned long)addr & ~PAGE_MASK));
-}
-EXPORT_SYMBOL(__ioremap);
-
-void iounmap(volatile void __iomem *addr)
-{
- /*
- * If mapped by BATs then there is nothing to do.
- * Calling vfree() generates a benign warning.
- */
- if (v_mapped_by_bats((unsigned long)addr)) return;
-
- if (addr > high_memory && (unsigned long) addr < ioremap_bot)
- vunmap((void *) (PAGE_MASK & (unsigned long)addr));
-}
-EXPORT_SYMBOL(iounmap);
-
-int map_page(unsigned long va, phys_addr_t pa, int flags)
-{
- pmd_t *pd;
- pte_t *pg;
- int err = -ENOMEM;
-
- /* Use upper 10 bits of VA to index the first level map */
- pd = pmd_offset(pud_offset(pgd_offset_k(va), va), va);
- /* Use middle 10 bits of VA to index the second-level map */
- pg = pte_alloc_kernel(pd, va);
- if (pg != 0) {
- err = 0;
- /* The PTE should never be already set nor present in the
- * hash table
- */
- BUG_ON((pte_val(*pg) & (_PAGE_PRESENT | _PAGE_HASHPTE)) &&
- flags);
- set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT,
- __pgprot(flags)));
- }
- return err;
-}
-
-/*
- * Map in a chunk of physical memory starting at start.
- */
-void __init __mapin_ram_chunk(unsigned long offset, unsigned long top)
-{
- unsigned long v, s, f;
- phys_addr_t p;
- int ktext;
-
- s = offset;
- v = PAGE_OFFSET + s;
- p = memstart_addr + s;
- for (; s < top; s += PAGE_SIZE) {
- ktext = ((char *) v >= _stext && (char *) v < etext);
- f = ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL;
- map_page(v, p, f);
-#ifdef CONFIG_PPC_STD_MMU_32
- if (ktext)
- hash_preload(&init_mm, v, 0, 0x300);
-#endif
- v += PAGE_SIZE;
- p += PAGE_SIZE;
- }
-}
-
-void __init mapin_ram(void)
-{
- unsigned long s, top;
-
-#ifndef CONFIG_WII
- top = total_lowmem;
- s = mmu_mapin_ram(top);
- __mapin_ram_chunk(s, top);
-#else
- if (!wii_hole_size) {
- s = mmu_mapin_ram(total_lowmem);
- __mapin_ram_chunk(s, total_lowmem);
- } else {
- top = wii_hole_start;
- s = mmu_mapin_ram(top);
- __mapin_ram_chunk(s, top);
-
- top = memblock_end_of_DRAM();
- s = wii_mmu_mapin_mem2(top);
- __mapin_ram_chunk(s, top);
- }
-#endif
-}
-
-/* Scan the real Linux page tables and return a PTE pointer for
- * a virtual address in a context.
- * Returns true (1) if PTE was found, zero otherwise. The pointer to
- * the PTE pointer is unmodified if PTE is not found.
- */
-int
-get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, pmd_t **pmdp)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- int retval = 0;
-
- pgd = pgd_offset(mm, addr & PAGE_MASK);
- if (pgd) {
- pud = pud_offset(pgd, addr & PAGE_MASK);
- if (pud && pud_present(*pud)) {
- pmd = pmd_offset(pud, addr & PAGE_MASK);
- if (pmd_present(*pmd)) {
- pte = pte_offset_map(pmd, addr & PAGE_MASK);
- if (pte) {
- retval = 1;
- *ptep = pte;
- if (pmdp)
- *pmdp = pmd;
- /* XXX caller needs to do pte_unmap, yuck */
- }
- }
- }
- }
- return(retval);
-}
-
-#ifdef CONFIG_DEBUG_PAGEALLOC
-
-static int __change_page_attr(struct page *page, pgprot_t prot)
-{
- pte_t *kpte;
- pmd_t *kpmd;
- unsigned long address;
-
- BUG_ON(PageHighMem(page));
- address = (unsigned long)page_address(page);
-
- if (v_mapped_by_bats(address) || v_mapped_by_tlbcam(address))
- return 0;
- if (!get_pteptr(&init_mm, address, &kpte, &kpmd))
- return -EINVAL;
- __set_pte_at(&init_mm, address, kpte, mk_pte(page, prot), 0);
- wmb();
- flush_tlb_page(NULL, address);
- pte_unmap(kpte);
-
- return 0;
-}
-
-/*
- * Change the page attributes of an page in the linear mapping.
- *
- * THIS CONFLICTS WITH BAT MAPPINGS, DEBUG USE ONLY
- */
-static int change_page_attr(struct page *page, int numpages, pgprot_t prot)
-{
- int i, err = 0;
- unsigned long flags;
-
- local_irq_save(flags);
- for (i = 0; i < numpages; i++, page++) {
- err = __change_page_attr(page, prot);
- if (err)
- break;
- }
- local_irq_restore(flags);
- return err;
-}
-
-
-void kernel_map_pages(struct page *page, int numpages, int enable)
-{
- if (PageHighMem(page))
- return;
-
- change_page_attr(page, numpages, enable ? PAGE_KERNEL : __pgprot(0));
-}
-#endif /* CONFIG_DEBUG_PAGEALLOC */
-
-static int fixmaps;
-
-void __set_fixmap (enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)
-{
- unsigned long address = __fix_to_virt(idx);
-
- if (idx >= __end_of_fixed_addresses) {
- BUG();
- return;
- }
-
- map_page(address, phys, pgprot_val(flags));
- fixmaps++;
-}
-
-void __this_fixmap_does_not_exist(void)
-{
- WARN_ON(1);
-}