From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/arch/powerpc/mm/pgtable_64.c | 330 ----------------------------- 1 file changed, 330 deletions(-) delete mode 100644 ANDROID_3.4.5/arch/powerpc/mm/pgtable_64.c (limited to 'ANDROID_3.4.5/arch/powerpc/mm/pgtable_64.c') diff --git a/ANDROID_3.4.5/arch/powerpc/mm/pgtable_64.c b/ANDROID_3.4.5/arch/powerpc/mm/pgtable_64.c deleted file mode 100644 index 249a0631..00000000 --- a/ANDROID_3.4.5/arch/powerpc/mm/pgtable_64.c +++ /dev/null @@ -1,330 +0,0 @@ -/* - * This file contains ioremap and related functions for 64-bit machines. - * - * Derived from arch/ppc64/mm/init.c - * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) - * - * Modifications by Paul Mackerras (PowerMac) (paulus@samba.org) - * 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 - * - * Dave Engebretsen - * Rework for PPC64 port. - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "mmu_decl.h" - -unsigned long ioremap_bot = IOREMAP_BASE; - - -#ifdef CONFIG_PPC_MMU_NOHASH -static void *early_alloc_pgtable(unsigned long size) -{ - void *pt; - - if (init_bootmem_done) - pt = __alloc_bootmem(size, size, __pa(MAX_DMA_ADDRESS)); - else - pt = __va(memblock_alloc_base(size, size, - __pa(MAX_DMA_ADDRESS))); - memset(pt, 0, size); - - return pt; -} -#endif /* CONFIG_PPC_MMU_NOHASH */ - -/* - * map_kernel_page currently only called by __ioremap - * map_kernel_page adds an entry to the ioremap page table - * and adds an entry to the HPT, possibly bolting it - */ -int map_kernel_page(unsigned long ea, unsigned long pa, int flags) -{ - pgd_t *pgdp; - pud_t *pudp; - pmd_t *pmdp; - pte_t *ptep; - - if (slab_is_available()) { - pgdp = pgd_offset_k(ea); - pudp = pud_alloc(&init_mm, pgdp, ea); - if (!pudp) - return -ENOMEM; - pmdp = pmd_alloc(&init_mm, pudp, ea); - if (!pmdp) - return -ENOMEM; - ptep = pte_alloc_kernel(pmdp, ea); - if (!ptep) - return -ENOMEM; - set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT, - __pgprot(flags))); - } else { -#ifdef CONFIG_PPC_MMU_NOHASH - /* Warning ! This will blow up if bootmem is not initialized - * which our ppc64 code is keen to do that, we'll need to - * fix it and/or be more careful - */ - pgdp = pgd_offset_k(ea); -#ifdef PUD_TABLE_SIZE - if (pgd_none(*pgdp)) { - pudp = early_alloc_pgtable(PUD_TABLE_SIZE); - BUG_ON(pudp == NULL); - pgd_populate(&init_mm, pgdp, pudp); - } -#endif /* PUD_TABLE_SIZE */ - pudp = pud_offset(pgdp, ea); - if (pud_none(*pudp)) { - pmdp = early_alloc_pgtable(PMD_TABLE_SIZE); - BUG_ON(pmdp == NULL); - pud_populate(&init_mm, pudp, pmdp); - } - pmdp = pmd_offset(pudp, ea); - if (!pmd_present(*pmdp)) { - ptep = early_alloc_pgtable(PAGE_SIZE); - BUG_ON(ptep == NULL); - pmd_populate_kernel(&init_mm, pmdp, ptep); - } - ptep = pte_offset_kernel(pmdp, ea); - set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT, - __pgprot(flags))); -#else /* CONFIG_PPC_MMU_NOHASH */ - /* - * If the mm subsystem is not fully up, we cannot create a - * linux page table entry for this mapping. Simply bolt an - * entry in the hardware page table. - * - */ - if (htab_bolt_mapping(ea, ea + PAGE_SIZE, pa, flags, - mmu_io_psize, mmu_kernel_ssize)) { - printk(KERN_ERR "Failed to do bolted mapping IO " - "memory at %016lx !\n", pa); - return -ENOMEM; - } -#endif /* !CONFIG_PPC_MMU_NOHASH */ - } - return 0; -} - - -/** - * __ioremap_at - Low level function to establish the page tables - * for an IO mapping - */ -void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size, - unsigned long flags) -{ - unsigned long i; - - /* Make sure we have the base flags */ - if ((flags & _PAGE_PRESENT) == 0) - flags |= pgprot_val(PAGE_KERNEL); - - /* Non-cacheable page cannot be coherent */ - if (flags & _PAGE_NO_CACHE) - flags &= ~_PAGE_COHERENT; - - /* We don't support the 4K PFN hack with ioremap */ - if (flags & _PAGE_4K_PFN) - return NULL; - - WARN_ON(pa & ~PAGE_MASK); - WARN_ON(((unsigned long)ea) & ~PAGE_MASK); - WARN_ON(size & ~PAGE_MASK); - - for (i = 0; i < size; i += PAGE_SIZE) - if (map_kernel_page((unsigned long)ea+i, pa+i, flags)) - return NULL; - - return (void __iomem *)ea; -} - -/** - * __iounmap_from - Low level function to tear down the page tables - * for an IO mapping. This is used for mappings that - * are manipulated manually, like partial unmapping of - * PCI IOs or ISA space. - */ -void __iounmap_at(void *ea, unsigned long size) -{ - WARN_ON(((unsigned long)ea) & ~PAGE_MASK); - WARN_ON(size & ~PAGE_MASK); - - unmap_kernel_range((unsigned long)ea, size); -} - -void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size, - unsigned long flags, void *caller) -{ - phys_addr_t paligned; - void __iomem *ret; - - /* - * Choose an address to map it to. - * Once the imalloc system is running, we use it. - * Before that, we map using addresses going - * up from ioremap_bot. imalloc will use - * the addresses from ioremap_bot through - * IMALLOC_END - * - */ - paligned = addr & PAGE_MASK; - size = PAGE_ALIGN(addr + size) - paligned; - - if ((size == 0) || (paligned == 0)) - return NULL; - - if (mem_init_done) { - struct vm_struct *area; - - area = __get_vm_area_caller(size, VM_IOREMAP, - ioremap_bot, IOREMAP_END, - caller); - if (area == NULL) - return NULL; - - area->phys_addr = paligned; - ret = __ioremap_at(paligned, area->addr, size, flags); - if (!ret) - vunmap(area->addr); - } else { - ret = __ioremap_at(paligned, (void *)ioremap_bot, size, flags); - if (ret) - ioremap_bot += size; - } - - if (ret) - ret += addr & ~PAGE_MASK; - return ret; -} - -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(phys_addr_t addr, unsigned long size) -{ - unsigned long flags = _PAGE_NO_CACHE | _PAGE_GUARDED; - void *caller = __builtin_return_address(0); - - if (ppc_md.ioremap) - return ppc_md.ioremap(addr, size, flags, caller); - return __ioremap_caller(addr, size, flags, caller); -} - -void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size) -{ - unsigned long flags = _PAGE_NO_CACHE; - void *caller = __builtin_return_address(0); - - if (ppc_md.ioremap) - return ppc_md.ioremap(addr, size, flags, caller); - return __ioremap_caller(addr, size, flags, caller); -} - -void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size, - unsigned long flags) -{ - void *caller = __builtin_return_address(0); - - /* writeable implies dirty for kernel addresses */ - if (flags & _PAGE_RW) - flags |= _PAGE_DIRTY; - - /* 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 - - if (ppc_md.ioremap) - return ppc_md.ioremap(addr, size, flags, caller); - return __ioremap_caller(addr, size, flags, caller); -} - - -/* - * Unmap an IO region and remove it from imalloc'd list. - * Access to IO memory should be serialized by driver. - */ -void __iounmap(volatile void __iomem *token) -{ - void *addr; - - if (!mem_init_done) - return; - - addr = (void *) ((unsigned long __force) - PCI_FIX_ADDR(token) & PAGE_MASK); - if ((unsigned long)addr < ioremap_bot) { - printk(KERN_WARNING "Attempt to iounmap early bolted mapping" - " at 0x%p\n", addr); - return; - } - vunmap(addr); -} - -void iounmap(volatile void __iomem *token) -{ - if (ppc_md.iounmap) - ppc_md.iounmap(token); - else - __iounmap(token); -} - -EXPORT_SYMBOL(ioremap); -EXPORT_SYMBOL(ioremap_wc); -EXPORT_SYMBOL(ioremap_prot); -EXPORT_SYMBOL(__ioremap); -EXPORT_SYMBOL(__ioremap_at); -EXPORT_SYMBOL(iounmap); -EXPORT_SYMBOL(__iounmap); -EXPORT_SYMBOL(__iounmap_at); -- cgit