diff options
Diffstat (limited to 'arch/microblaze/include/asm/page.h')
| -rw-r--r-- | arch/microblaze/include/asm/page.h | 166 |
1 files changed, 123 insertions, 43 deletions
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index 7238dcfcc51..210e584974f 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -1,6 +1,8 @@ /* - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2008 PetaLogix + * VM ops + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * Changes for MMU support: * Copyright (C) 2007 Xilinx, Inc. All rights reserved. @@ -15,14 +17,15 @@ #include <linux/pfn.h> #include <asm/setup.h> +#include <linux/const.h> + +#ifdef __KERNEL__ /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT (12) -#define PAGE_SIZE (1UL << PAGE_SHIFT) +#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) -#ifdef __KERNEL__ - #ifndef __ASSEMBLY__ #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) @@ -35,6 +38,7 @@ /* align addr on a size boundary - adjust address up if needed */ #define _ALIGN(addr, size) _ALIGN_UP(addr, size) +#ifndef CONFIG_MMU /* * PAGE_OFFSET -- the first address of the first page of memory. When not * using MMU this corresponds to the first free page in physical memory (aligned @@ -43,15 +47,44 @@ extern unsigned int __page_offset; #define PAGE_OFFSET __page_offset -#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) -#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) -#define free_user_page(page, addr) free_page(addr) +#else /* CONFIG_MMU */ -#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) +/* + * PAGE_OFFSET -- the first address of the first page of memory. With MMU + * it is set to the kernel start address (aligned on a page boundary). + * + * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used + * in arch/microblaze/Makefile. + */ +#define PAGE_OFFSET CONFIG_KERNEL_START +/* + * MAP_NR -- given an address, calculate the index of the page struct which + * points to the address's page. + */ +#define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT) -#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) -#define copy_user_page(vto, vfrom, vaddr, topg) \ +/* + * The basic type of a PTE - 32 bit physical addressing. + */ +typedef unsigned long pte_basic_t; +#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ +#define PTE_FMT "%.8lx" + +#endif /* CONFIG_MMU */ + +# ifndef CONFIG_MMU +# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) +# define get_user_page(vaddr) __get_free_page(GFP_KERNEL) +# define free_user_page(page, addr) free_page(addr) +# else /* CONFIG_MMU */ +extern void copy_page(void *to, void *from); +# endif /* CONFIG_MMU */ + +# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) + +# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) +# define copy_user_page(vto, vfrom, vaddr, topg) \ memcpy((vto), (vfrom), PAGE_SIZE) /* @@ -60,21 +93,32 @@ extern unsigned int __page_offset; typedef struct page *pgtable_t; typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pgprot; } pgprot_t; +/* FIXME this can depend on linux kernel version */ +# ifdef CONFIG_MMU +typedef struct { unsigned long pmd; } pmd_t; +typedef struct { unsigned long pgd; } pgd_t; +# else /* CONFIG_MMU */ typedef struct { unsigned long ste[64]; } pmd_t; typedef struct { pmd_t pue[1]; } pud_t; typedef struct { pud_t pge[1]; } pgd_t; +# endif /* CONFIG_MMU */ +# define pte_val(x) ((x).pte) +# define pgprot_val(x) ((x).pgprot) -#define pte_val(x) ((x).pte) -#define pgprot_val(x) ((x).pgprot) -#define pmd_val(x) ((x).ste[0]) -#define pud_val(x) ((x).pue[0]) -#define pgd_val(x) ((x).pge[0]) +# ifdef CONFIG_MMU +# define pmd_val(x) ((x).pmd) +# define pgd_val(x) ((x).pgd) +# else /* CONFIG_MMU */ +# define pmd_val(x) ((x).ste[0]) +# define pud_val(x) ((x).pue[0]) +# define pgd_val(x) ((x).pge[0]) +# endif /* CONFIG_MMU */ -#define __pte(x) ((pte_t) { (x) }) -#define __pmd(x) ((pmd_t) { (x) }) -#define __pgd(x) ((pgd_t) { (x) }) -#define __pgprot(x) ((pgprot_t) { (x) }) +# define __pte(x) ((pte_t) { (x) }) +# define __pmd(x) ((pmd_t) { (x) }) +# define __pgd(x) ((pgd_t) { (x) }) +# define __pgprot(x) ((pgprot_t) { (x) }) /** * Conversions for virtual address, physical address, pfn, and struct @@ -94,44 +138,80 @@ extern unsigned long max_low_pfn; extern unsigned long min_low_pfn; extern unsigned long max_pfn; -#define __pa(vaddr) ((unsigned long) (vaddr)) -#define __va(paddr) ((void *) (paddr)) +extern unsigned long memory_start; +extern unsigned long memory_end; +extern unsigned long memory_size; -#define phys_to_pfn(phys) (PFN_DOWN(phys)) -#define pfn_to_phys(pfn) (PFN_PHYS(pfn)) +extern int page_is_ram(unsigned long pfn); -#define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) -#define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) +# define phys_to_pfn(phys) (PFN_DOWN(phys)) +# define pfn_to_phys(pfn) (PFN_PHYS(pfn)) -#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) -#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) +# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) +# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) -#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) -#define page_to_bus(page) (page_to_phys(page)) -#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) +# ifdef CONFIG_MMU +# define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr)) +# else /* CONFIG_MMU */ +# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) +# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) +# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) +# define page_to_bus(page) (page_to_phys(page)) +# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) +# endif /* CONFIG_MMU */ -extern unsigned int memory_start; -extern unsigned int memory_end; -extern unsigned int memory_size; +# ifndef CONFIG_MMU +# define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) <= max_mapnr) +# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) +# else /* CONFIG_MMU */ +# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) +# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) +# define VALID_PAGE(page) ((page - mem_map) < max_mapnr) +# endif /* CONFIG_MMU */ -#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_mapnr) +# endif /* __ASSEMBLY__ */ -#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) +#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) -#else -#define tophys(rd, rs) (addik rd, rs, 0) -#define tovirt(rd, rs) (addik rd, rs, 0) -#endif /* __ASSEMBLY__ */ -#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) +# ifndef CONFIG_MMU +# define __pa(vaddr) ((unsigned long) (vaddr)) +# define __va(paddr) ((void *) (paddr)) +# else /* CONFIG_MMU */ +# define __pa(x) __virt_to_phys((unsigned long)(x)) +# define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) +# endif /* CONFIG_MMU */ + -/* Convert between virtual and physical address for MMU. */ -/* Handle MicroBlaze processor with virtual memory. */ +/* Convert between virtual and physical address for MMU. */ +/* Handle MicroBlaze processor with virtual memory. */ +#ifndef CONFIG_MMU #define __virt_to_phys(addr) addr #define __phys_to_virt(addr) addr +#define tophys(rd, rs) addik rd, rs, 0 +#define tovirt(rd, rs) addik rd, rs, 0 +#else +#define __virt_to_phys(addr) \ + ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) +#define __phys_to_virt(addr) \ + ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) +#define tophys(rd, rs) \ + addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) +#define tovirt(rd, rs) \ + addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) +#endif /* CONFIG_MMU */ #define TOPHYS(addr) __virt_to_phys(addr) +#ifdef CONFIG_MMU +#ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC +#define WANT_PAGE_VIRTUAL 1 /* page alloc 2 relies on this */ +#endif + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#endif /* CONFIG_MMU */ + #endif /* __KERNEL__ */ #include <asm-generic/memory_model.h> |