diff options
Diffstat (limited to 'include/asm-powerpc/page.h')
| -rw-r--r-- | include/asm-powerpc/page.h | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/include/asm-powerpc/page.h b/include/asm-powerpc/page.h deleted file mode 100644 index e088545..0000000 --- a/include/asm-powerpc/page.h +++ /dev/null @@ -1,225 +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. - */ - -#include <asm/asm-compat.h> -#include <asm/kdump.h> -#include <asm/types.h> - -/* - * On PPC32 page size is 4K. 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. - */ -#ifdef CONFIG_PPC_64K_PAGES -#define PAGE_SHIFT 16 -#else -#define PAGE_SHIFT 12 -#endif - -#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) - -/* 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_RELOCATABLE) && defined(CONFIG_FLATMEM) -#ifndef __ASSEMBLY__ -extern phys_addr_t memstart_addr; -extern phys_addr_t kernstart_addr; -#endif -#define PHYSICAL_START kernstart_addr -#define MEMORY_START memstart_addr -#else -#define PHYSICAL_START ASM_CONST(CONFIG_PHYSICAL_START) -#define MEMORY_START (PHYSICAL_START + PAGE_OFFSET - KERNELBASE) -#endif - -#ifdef CONFIG_FLATMEM -#define ARCH_PFN_OFFSET (MEMORY_START >> PAGE_SHIFT) -#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < (ARCH_PFN_OFFSET + 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) - -#define __va(x) ((void *)((unsigned long)(x) - PHYSICAL_START + KERNELBASE)) -#define __pa(x) ((unsigned long)(x) + PHYSICAL_START - KERNELBASE) - -/* - * 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. - */ -#define is_kernel_addr(x) ((x) >= PAGE_OFFSET) - -#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 - */ -#ifdef CONFIG_PPC_64K_PAGES -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) - -#ifdef CONFIG_PPC_64K_PAGES -typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; -#else -typedef unsigned long 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 - -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); - -struct vm_area_struct; - -typedef struct page *pgtable_t; - -#include <asm-generic/memory_model.h> -#endif /* __ASSEMBLY__ */ - -#endif /* _ASM_POWERPC_PAGE_H */ |