| /* |
| * 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. |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| |
| #ifndef _ASM_MICROBLAZE_PAGE_H |
| #define _ASM_MICROBLAZE_PAGE_H |
| |
| #include <linux/pfn.h> |
| #include <asm/setup.h> |
| #include <asm/asm-compat.h> |
| #include <linux/const.h> |
| |
| #ifdef __KERNEL__ |
| |
| /* PAGE_SHIFT determines the page size */ |
| #define PAGE_SHIFT (12) |
| #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| |
| #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) |
| #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) |
| |
| /* 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) |
| |
| #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 |
| * on a page boundary). |
| */ |
| extern unsigned int __page_offset; |
| #define PAGE_OFFSET __page_offset |
| |
| #else /* CONFIG_MMU */ |
| |
| /* |
| * 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 |
| |
| /* |
| * 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) |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| 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) |
| |
| # 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) }) |
| |
| /** |
| * Conversions for virtual address, physical address, pfn, and struct |
| * page are defined in the following files. |
| * |
| * virt -+ |
| * | asm-microblaze/page.h |
| * phys -+ |
| * | linux/pfn.h |
| * pfn -+ |
| * | asm-generic/memory_model.h |
| * page -+ |
| * |
| */ |
| |
| extern unsigned long max_low_pfn; |
| extern unsigned long min_low_pfn; |
| extern unsigned long max_pfn; |
| |
| extern unsigned long memory_start; |
| extern unsigned long memory_end; |
| extern unsigned long memory_size; |
| |
| extern int page_is_ram(unsigned long pfn); |
| |
| # define phys_to_pfn(phys) (PFN_DOWN(phys)) |
| # define pfn_to_phys(pfn) (PFN_PHYS(pfn)) |
| |
| # define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) |
| # define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) |
| |
| # ifdef CONFIG_MMU |
| |
| # define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)) |
| # define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) |
| # define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
| |
| # 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 */ |
| |
| # ifndef CONFIG_MMU |
| # define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \ |
| ((pfn) <= (min_low_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 */ |
| |
| # 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. */ |
| #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> |
| #include <asm-generic/getorder.h> |
| |
| #endif /* _ASM_MICROBLAZE_PAGE_H */ |