diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/include/asm/page.h')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/include/asm/page.h | 386 |
1 files changed, 0 insertions, 386 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/include/asm/page.h b/ANDROID_3.4.5/arch/powerpc/include/asm/page.h deleted file mode 100644 index f072e974..00000000 --- a/ANDROID_3.4.5/arch/powerpc/include/asm/page.h +++ /dev/null @@ -1,386 +0,0 @@ -#ifndef _ASM_POWERPC_PAGE_H -#define _ASM_POWERPC_PAGE_H - -/* - * Copyright (C) 2001,2005 IBM Corporation. - * - * 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. - */ - -#ifndef __ASSEMBLY__ -#include <linux/types.h> -#else -#include <asm/types.h> -#endif -#include <asm/asm-compat.h> -#include <asm/kdump.h> - -/* - * On regular PPC32 page size is 4K (but we support 4K/16K/64K/256K pages - * on PPC44x). For PPC64 we support either 4K or 64K software - * page size. When using 64K pages however, whether we are really supporting - * 64K pages in HW or not is irrelevant to those definitions. - */ -#if defined(CONFIG_PPC_256K_PAGES) -#define PAGE_SHIFT 18 -#elif defined(CONFIG_PPC_64K_PAGES) -#define PAGE_SHIFT 16 -#elif defined(CONFIG_PPC_16K_PAGES) -#define PAGE_SHIFT 14 -#else -#define PAGE_SHIFT 12 -#endif - -#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) - -#ifndef __ASSEMBLY__ -#ifdef CONFIG_HUGETLB_PAGE -extern unsigned int HPAGE_SHIFT; -#else -#define HPAGE_SHIFT PAGE_SHIFT -#endif -#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) -#define HPAGE_MASK (~(HPAGE_SIZE - 1)) -#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) -#define HUGE_MAX_HSTATE (MMU_PAGE_COUNT-1) -#endif - -/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */ -#define __HAVE_ARCH_GATE_AREA 1 - -/* - * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we - * assign PAGE_MASK to a larger type it gets extended the way we want - * (i.e. with 1s in the high bits) - */ -#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) - -/* - * KERNELBASE is the virtual address of the start of the kernel, it's often - * the same as PAGE_OFFSET, but _might not be_. - * - * The kdump dump kernel is one example where KERNELBASE != PAGE_OFFSET. - * - * PAGE_OFFSET is the virtual address of the start of lowmem. - * - * PHYSICAL_START is the physical address of the start of the kernel. - * - * MEMORY_START is the physical address of the start of lowmem. - * - * KERNELBASE, PAGE_OFFSET, and PHYSICAL_START are all configurable on - * ppc32 and based on how they are set we determine MEMORY_START. - * - * For the linear mapping the following equation should be true: - * KERNELBASE - PAGE_OFFSET = PHYSICAL_START - MEMORY_START - * - * Also, KERNELBASE >= PAGE_OFFSET and PHYSICAL_START >= MEMORY_START - * - * There are two was to determine a physical address from a virtual one: - * va = pa + PAGE_OFFSET - MEMORY_START - * va = pa + KERNELBASE - PHYSICAL_START - * - * If you want to know something's offset from the start of the kernel you - * should subtract KERNELBASE. - * - * If you want to test if something's a kernel address, use is_kernel_addr(). - */ - -#define KERNELBASE ASM_CONST(CONFIG_KERNEL_START) -#define PAGE_OFFSET ASM_CONST(CONFIG_PAGE_OFFSET) -#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_PHYSICAL_START)) - -#if defined(CONFIG_NONSTATIC_KERNEL) -#ifndef __ASSEMBLY__ - -extern phys_addr_t memstart_addr; -extern phys_addr_t kernstart_addr; - -#ifdef CONFIG_RELOCATABLE_PPC32 -extern long long virt_phys_offset; -#endif - -#endif /* __ASSEMBLY__ */ -#define PHYSICAL_START kernstart_addr - -#else /* !CONFIG_NONSTATIC_KERNEL */ -#define PHYSICAL_START ASM_CONST(CONFIG_PHYSICAL_START) -#endif - -/* See Description below for VIRT_PHYS_OFFSET */ -#ifdef CONFIG_RELOCATABLE_PPC32 -#define VIRT_PHYS_OFFSET virt_phys_offset -#else -#define VIRT_PHYS_OFFSET (KERNELBASE - PHYSICAL_START) -#endif - - -#ifdef CONFIG_PPC64 -#define MEMORY_START 0UL -#elif defined(CONFIG_NONSTATIC_KERNEL) -#define MEMORY_START memstart_addr -#else -#define MEMORY_START (PHYSICAL_START + PAGE_OFFSET - KERNELBASE) -#endif - -#ifdef CONFIG_FLATMEM -#define ARCH_PFN_OFFSET ((unsigned long)(MEMORY_START >> PAGE_SHIFT)) -#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr) -#endif - -#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) -#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) -#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) - -/* - * On Book-E parts we need __va to parse the device tree and we can't - * determine MEMORY_START until then. However we can determine PHYSICAL_START - * from information at hand (program counter, TLB lookup). - * - * On BookE with RELOCATABLE (RELOCATABLE_PPC32) - * - * With RELOCATABLE_PPC32, we support loading the kernel at any physical - * address without any restriction on the page alignment. - * - * We find the runtime address of _stext and relocate ourselves based on - * the following calculation: - * - * virtual_base = ALIGN_DOWN(KERNELBASE,256M) + - * MODULO(_stext.run,256M) - * and create the following mapping: - * - * ALIGN_DOWN(_stext.run,256M) => ALIGN_DOWN(KERNELBASE,256M) - * - * When we process relocations, we cannot depend on the - * existing equation for the __va()/__pa() translations: - * - * __va(x) = (x) - PHYSICAL_START + KERNELBASE - * - * Where: - * PHYSICAL_START = kernstart_addr = Physical address of _stext - * KERNELBASE = Compiled virtual address of _stext. - * - * This formula holds true iff, kernel load address is TLB page aligned. - * - * In our case, we need to also account for the shift in the kernel Virtual - * address. - * - * E.g., - * - * Let the kernel be loaded at 64MB and KERNELBASE be 0xc0000000 (same as PAGE_OFFSET). - * In this case, we would be mapping 0 to 0xc0000000, and kernstart_addr = 64M - * - * Now __va(1MB) = (0x100000) - (0x4000000) + 0xc0000000 - * = 0xbc100000 , which is wrong. - * - * Rather, it should be : 0xc0000000 + 0x100000 = 0xc0100000 - * according to our mapping. - * - * Hence we use the following formula to get the translations right: - * - * __va(x) = (x) - [ PHYSICAL_START - Effective KERNELBASE ] - * - * Where : - * PHYSICAL_START = dynamic load address.(kernstart_addr variable) - * Effective KERNELBASE = virtual_base = - * = ALIGN_DOWN(KERNELBASE,256M) + - * MODULO(PHYSICAL_START,256M) - * - * To make the cost of __va() / __pa() more light weight, we introduce - * a new variable virt_phys_offset, which will hold : - * - * virt_phys_offset = Effective KERNELBASE - PHYSICAL_START - * = ALIGN_DOWN(KERNELBASE,256M) - - * ALIGN_DOWN(PHYSICALSTART,256M) - * - * Hence : - * - * __va(x) = x - PHYSICAL_START + Effective KERNELBASE - * = x + virt_phys_offset - * - * and - * __pa(x) = x + PHYSICAL_START - Effective KERNELBASE - * = x - virt_phys_offset - * - * On non-Book-E PPC64 PAGE_OFFSET and MEMORY_START are constants so use - * the other definitions for __va & __pa. - */ -#ifdef CONFIG_BOOKE -#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + VIRT_PHYS_OFFSET)) -#define __pa(x) ((unsigned long)(x) - VIRT_PHYS_OFFSET) -#else -#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + PAGE_OFFSET - MEMORY_START)) -#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + MEMORY_START) -#endif - -/* - * Unfortunately the PLT is in the BSS in the PPC32 ELF ABI, - * and needs to be executable. This means the whole heap ends - * up being executable. - */ -#define VM_DATA_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) - -#define VM_DATA_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) - -#ifdef __powerpc64__ -#include <asm/page_64.h> -#else -#include <asm/page_32.h> -#endif - -/* align addr on a size boundary - adjust address up/down if needed */ -#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1))) -#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1))) - -/* align addr on a size boundary - adjust address up if needed */ -#define _ALIGN(addr,size) _ALIGN_UP(addr,size) - -/* - * Don't compare things with KERNELBASE or PAGE_OFFSET to test for - * "kernelness", use is_kernel_addr() - it should do what you want. - */ -#ifdef CONFIG_PPC_BOOK3E_64 -#define is_kernel_addr(x) ((x) >= 0x8000000000000000ul) -#else -#define is_kernel_addr(x) ((x) >= PAGE_OFFSET) -#endif - -/* - * Use the top bit of the higher-level page table entries to indicate whether - * the entries we point to contain hugepages. This works because we know that - * the page tables live in kernel space. If we ever decide to support having - * page tables at arbitrary addresses, this breaks and will have to change. - */ -#ifdef CONFIG_PPC64 -#define PD_HUGE 0x8000000000000000 -#else -#define PD_HUGE 0x80000000 -#endif - -/* - * Some number of bits at the level of the page table that points to - * a hugepte are used to encode the size. This masks those bits. - */ -#define HUGEPD_SHIFT_MASK 0x3f - -#ifndef __ASSEMBLY__ - -#undef STRICT_MM_TYPECHECKS - -#ifdef STRICT_MM_TYPECHECKS -/* These are used to make use of C type-checking. */ - -/* PTE level */ -typedef struct { pte_basic_t pte; } pte_t; -#define pte_val(x) ((x).pte) -#define __pte(x) ((pte_t) { (x) }) - -/* 64k pages additionally define a bigger "real PTE" type that gathers - * the "second half" part of the PTE for pseudo 64k pages - */ -#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64) -typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; -#else -typedef struct { pte_t pte; } real_pte_t; -#endif - -/* PMD level */ -#ifdef CONFIG_PPC64 -typedef struct { unsigned long pmd; } pmd_t; -#define pmd_val(x) ((x).pmd) -#define __pmd(x) ((pmd_t) { (x) }) - -/* PUD level exusts only on 4k pages */ -#ifndef CONFIG_PPC_64K_PAGES -typedef struct { unsigned long pud; } pud_t; -#define pud_val(x) ((x).pud) -#define __pud(x) ((pud_t) { (x) }) -#endif /* !CONFIG_PPC_64K_PAGES */ -#endif /* CONFIG_PPC64 */ - -/* PGD level */ -typedef struct { unsigned long pgd; } pgd_t; -#define pgd_val(x) ((x).pgd) -#define __pgd(x) ((pgd_t) { (x) }) - -/* Page protection bits */ -typedef struct { unsigned long pgprot; } pgprot_t; -#define pgprot_val(x) ((x).pgprot) -#define __pgprot(x) ((pgprot_t) { (x) }) - -#else - -/* - * .. while these make it easier on the compiler - */ - -typedef pte_basic_t pte_t; -#define pte_val(x) (x) -#define __pte(x) (x) - -#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64) -typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; -#else -typedef pte_t real_pte_t; -#endif - - -#ifdef CONFIG_PPC64 -typedef unsigned long pmd_t; -#define pmd_val(x) (x) -#define __pmd(x) (x) - -#ifndef CONFIG_PPC_64K_PAGES -typedef unsigned long pud_t; -#define pud_val(x) (x) -#define __pud(x) (x) -#endif /* !CONFIG_PPC_64K_PAGES */ -#endif /* CONFIG_PPC64 */ - -typedef unsigned long pgd_t; -#define pgd_val(x) (x) -#define pgprot_val(x) (x) - -typedef unsigned long pgprot_t; -#define __pgd(x) (x) -#define __pgprot(x) (x) - -#endif - -typedef struct { signed long pd; } hugepd_t; - -#ifdef CONFIG_HUGETLB_PAGE -static inline int hugepd_ok(hugepd_t hpd) -{ - return (hpd.pd > 0); -} - -#define is_hugepd(pdep) (hugepd_ok(*((hugepd_t *)(pdep)))) -#else /* CONFIG_HUGETLB_PAGE */ -#define is_hugepd(pdep) 0 -#endif /* CONFIG_HUGETLB_PAGE */ - -struct page; -extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg); -extern void copy_user_page(void *to, void *from, unsigned long vaddr, - struct page *p); -extern int page_is_ram(unsigned long pfn); -extern int devmem_is_allowed(unsigned long pfn); - -#ifdef CONFIG_PPC_SMLPAR -void arch_free_page(struct page *page, int order); -#define HAVE_ARCH_FREE_PAGE -#endif - -struct vm_area_struct; - -typedef struct page *pgtable_t; - -#include <asm-generic/memory_model.h> -#endif /* __ASSEMBLY__ */ - -#endif /* _ASM_POWERPC_PAGE_H */ |