14b87d7a4SMichal Simek /* 21f84e1eaSMichal Simek * VM ops 31f84e1eaSMichal Simek * 41f84e1eaSMichal Simek * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 51f84e1eaSMichal Simek * Copyright (C) 2008-2009 PetaLogix 64b87d7a4SMichal Simek * Copyright (C) 2006 Atmark Techno, Inc. 74b87d7a4SMichal Simek * Changes for MMU support: 84b87d7a4SMichal Simek * Copyright (C) 2007 Xilinx, Inc. All rights reserved. 94b87d7a4SMichal Simek * 104b87d7a4SMichal Simek * This file is subject to the terms and conditions of the GNU General Public 114b87d7a4SMichal Simek * License. See the file "COPYING" in the main directory of this archive 124b87d7a4SMichal Simek * for more details. 134b87d7a4SMichal Simek */ 144b87d7a4SMichal Simek 154b87d7a4SMichal Simek #ifndef _ASM_MICROBLAZE_PAGE_H 164b87d7a4SMichal Simek #define _ASM_MICROBLAZE_PAGE_H 174b87d7a4SMichal Simek 184b87d7a4SMichal Simek #include <linux/pfn.h> 194b87d7a4SMichal Simek #include <asm/setup.h> 20a1253977SJohn Williams #include <asm/asm-compat.h> 211f84e1eaSMichal Simek #include <linux/const.h> 221f84e1eaSMichal Simek 231f84e1eaSMichal Simek #ifdef __KERNEL__ 244b87d7a4SMichal Simek 254b87d7a4SMichal Simek /* PAGE_SHIFT determines the page size */ 26ba9c4f88SSteven J. Magnani #if defined(CONFIG_MICROBLAZE_32K_PAGES) 27ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 15 28ba9c4f88SSteven J. Magnani #elif defined(CONFIG_MICROBLAZE_16K_PAGES) 29ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 14 30ba9c4f88SSteven J. Magnani #elif defined(CONFIG_MICROBLAZE_8K_PAGES) 31ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 13 32ba9c4f88SSteven J. Magnani #else 33ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 12 34ba9c4f88SSteven J. Magnani #endif 35ba9c4f88SSteven J. Magnani #define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) 364b87d7a4SMichal Simek #define PAGE_MASK (~(PAGE_SIZE-1)) 374b87d7a4SMichal Simek 38a1253977SJohn Williams #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) 39a1253977SJohn Williams 404b87d7a4SMichal Simek #ifndef __ASSEMBLY__ 414b87d7a4SMichal Simek 42de925d9dSMichal Simek /* MS be sure that SLAB allocates aligned objects */ 43de925d9dSMichal Simek #define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES 44de925d9dSMichal Simek 45ffe57d02SMichal Simek #define ARCH_SLAB_MINALIGN L1_CACHE_BYTES 46ffe57d02SMichal Simek 474b87d7a4SMichal Simek #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) 484b87d7a4SMichal Simek #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) 494b87d7a4SMichal Simek 504b87d7a4SMichal Simek /* align addr on a size boundary - adjust address up/down if needed */ 514b87d7a4SMichal Simek #define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1))) 524b87d7a4SMichal Simek #define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1))) 534b87d7a4SMichal Simek 544b87d7a4SMichal Simek /* align addr on a size boundary - adjust address up if needed */ 554b87d7a4SMichal Simek #define _ALIGN(addr, size) _ALIGN_UP(addr, size) 564b87d7a4SMichal Simek 571f84e1eaSMichal Simek #ifndef CONFIG_MMU 584b87d7a4SMichal Simek /* 594b87d7a4SMichal Simek * PAGE_OFFSET -- the first address of the first page of memory. When not 604b87d7a4SMichal Simek * using MMU this corresponds to the first free page in physical memory (aligned 614b87d7a4SMichal Simek * on a page boundary). 624b87d7a4SMichal Simek */ 634b87d7a4SMichal Simek extern unsigned int __page_offset; 644b87d7a4SMichal Simek #define PAGE_OFFSET __page_offset 654b87d7a4SMichal Simek 661f84e1eaSMichal Simek #else /* CONFIG_MMU */ 671f84e1eaSMichal Simek 681f84e1eaSMichal Simek /* 691f84e1eaSMichal Simek * PAGE_OFFSET -- the first address of the first page of memory. With MMU 701f84e1eaSMichal Simek * it is set to the kernel start address (aligned on a page boundary). 711f84e1eaSMichal Simek * 721f84e1eaSMichal Simek * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used 731f84e1eaSMichal Simek * in arch/microblaze/Makefile. 741f84e1eaSMichal Simek */ 751f84e1eaSMichal Simek #define PAGE_OFFSET CONFIG_KERNEL_START 761f84e1eaSMichal Simek 771f84e1eaSMichal Simek /* 781f84e1eaSMichal Simek * The basic type of a PTE - 32 bit physical addressing. 791f84e1eaSMichal Simek */ 801f84e1eaSMichal Simek typedef unsigned long pte_basic_t; 811f84e1eaSMichal Simek #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ 821f84e1eaSMichal Simek #define PTE_FMT "%.8lx" 831f84e1eaSMichal Simek 841f84e1eaSMichal Simek #endif /* CONFIG_MMU */ 851f84e1eaSMichal Simek 8643f2a6e8SMichal Simek # define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 874b87d7a4SMichal Simek # define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) 884b87d7a4SMichal Simek 894b87d7a4SMichal Simek # define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) 904b87d7a4SMichal Simek # define copy_user_page(vto, vfrom, vaddr, topg) \ 914b87d7a4SMichal Simek memcpy((vto), (vfrom), PAGE_SIZE) 924b87d7a4SMichal Simek 934b87d7a4SMichal Simek /* 944b87d7a4SMichal Simek * These are used to make use of C type-checking.. 954b87d7a4SMichal Simek */ 964b87d7a4SMichal Simek typedef struct page *pgtable_t; 974b87d7a4SMichal Simek typedef struct { unsigned long pte; } pte_t; 984b87d7a4SMichal Simek typedef struct { unsigned long pgprot; } pgprot_t; 991f84e1eaSMichal Simek /* FIXME this can depend on linux kernel version */ 1001f84e1eaSMichal Simek # ifdef CONFIG_MMU 1011f84e1eaSMichal Simek typedef struct { unsigned long pmd; } pmd_t; 1021f84e1eaSMichal Simek typedef struct { unsigned long pgd; } pgd_t; 1031f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1044b87d7a4SMichal Simek typedef struct { unsigned long ste[64]; } pmd_t; 1054b87d7a4SMichal Simek typedef struct { pmd_t pue[1]; } pud_t; 1064b87d7a4SMichal Simek typedef struct { pud_t pge[1]; } pgd_t; 1071f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1084b87d7a4SMichal Simek 1094b87d7a4SMichal Simek # define pte_val(x) ((x).pte) 1104b87d7a4SMichal Simek # define pgprot_val(x) ((x).pgprot) 1111f84e1eaSMichal Simek 1121f84e1eaSMichal Simek # ifdef CONFIG_MMU 1131f84e1eaSMichal Simek # define pmd_val(x) ((x).pmd) 1141f84e1eaSMichal Simek # define pgd_val(x) ((x).pgd) 1151f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1164b87d7a4SMichal Simek # define pmd_val(x) ((x).ste[0]) 1174b87d7a4SMichal Simek # define pud_val(x) ((x).pue[0]) 1184b87d7a4SMichal Simek # define pgd_val(x) ((x).pge[0]) 1191f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1204b87d7a4SMichal Simek 1214b87d7a4SMichal Simek # define __pte(x) ((pte_t) { (x) }) 1224b87d7a4SMichal Simek # define __pmd(x) ((pmd_t) { (x) }) 1234b87d7a4SMichal Simek # define __pgd(x) ((pgd_t) { (x) }) 1244b87d7a4SMichal Simek # define __pgprot(x) ((pgprot_t) { (x) }) 1254b87d7a4SMichal Simek 1264b87d7a4SMichal Simek /** 1274b87d7a4SMichal Simek * Conversions for virtual address, physical address, pfn, and struct 1284b87d7a4SMichal Simek * page are defined in the following files. 1294b87d7a4SMichal Simek * 1304b87d7a4SMichal Simek * virt -+ 1314b87d7a4SMichal Simek * | asm-microblaze/page.h 1324b87d7a4SMichal Simek * phys -+ 1334b87d7a4SMichal Simek * | linux/pfn.h 1344b87d7a4SMichal Simek * pfn -+ 1354b87d7a4SMichal Simek * | asm-generic/memory_model.h 1364b87d7a4SMichal Simek * page -+ 1374b87d7a4SMichal Simek * 1384b87d7a4SMichal Simek */ 1394b87d7a4SMichal Simek 1404b87d7a4SMichal Simek extern unsigned long max_low_pfn; 1414b87d7a4SMichal Simek extern unsigned long min_low_pfn; 1424b87d7a4SMichal Simek extern unsigned long max_pfn; 1434b87d7a4SMichal Simek 1441f84e1eaSMichal Simek extern unsigned long memory_start; 1451f84e1eaSMichal Simek extern unsigned long memory_end; 1461f84e1eaSMichal Simek extern unsigned long memory_size; 1471f84e1eaSMichal Simek 1481f84e1eaSMichal Simek extern int page_is_ram(unsigned long pfn); 1494b87d7a4SMichal Simek 1504b87d7a4SMichal Simek # define phys_to_pfn(phys) (PFN_DOWN(phys)) 1514b87d7a4SMichal Simek # define pfn_to_phys(pfn) (PFN_PHYS(pfn)) 1524b87d7a4SMichal Simek 1534b87d7a4SMichal Simek # define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) 1544b87d7a4SMichal Simek # define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) 1554b87d7a4SMichal Simek 1561f84e1eaSMichal Simek # ifdef CONFIG_MMU 157d79f3b06SMichal Simek 158d79f3b06SMichal Simek # define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)) 159d79f3b06SMichal Simek # define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) 160d79f3b06SMichal Simek # define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 161d79f3b06SMichal Simek 1621f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1634b87d7a4SMichal Simek # define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) 1644b87d7a4SMichal Simek # define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) 1654b87d7a4SMichal Simek # define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) 1664b87d7a4SMichal Simek # define page_to_bus(page) (page_to_phys(page)) 1674b87d7a4SMichal Simek # define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) 1681f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1694b87d7a4SMichal Simek 1701f84e1eaSMichal Simek # ifndef CONFIG_MMU 1715dd48a23Ssteve@digidescorp.com # define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \ 1725dd48a23Ssteve@digidescorp.com ((pfn) <= (min_low_pfn + max_mapnr))) 1734b87d7a4SMichal Simek # define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) 1741f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1751f84e1eaSMichal Simek # define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) 1761f84e1eaSMichal Simek # define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) 1771f84e1eaSMichal Simek # define VALID_PAGE(page) ((page - mem_map) < max_mapnr) 1781f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1794b87d7a4SMichal Simek 1804b87d7a4SMichal Simek # endif /* __ASSEMBLY__ */ 1814b87d7a4SMichal Simek 1824b87d7a4SMichal Simek #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) 1834b87d7a4SMichal Simek 1841f84e1eaSMichal Simek 1851f84e1eaSMichal Simek # ifndef CONFIG_MMU 1861f84e1eaSMichal Simek # define __pa(vaddr) ((unsigned long) (vaddr)) 1871f84e1eaSMichal Simek # define __va(paddr) ((void *) (paddr)) 1881f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1891f84e1eaSMichal Simek # define __pa(x) __virt_to_phys((unsigned long)(x)) 1901f84e1eaSMichal Simek # define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) 1911f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1921f84e1eaSMichal Simek 1931f84e1eaSMichal Simek 1944b87d7a4SMichal Simek /* Convert between virtual and physical address for MMU. */ 1954b87d7a4SMichal Simek /* Handle MicroBlaze processor with virtual memory. */ 1961f84e1eaSMichal Simek #ifndef CONFIG_MMU 1974b87d7a4SMichal Simek #define __virt_to_phys(addr) addr 1984b87d7a4SMichal Simek #define __phys_to_virt(addr) addr 1991f84e1eaSMichal Simek #define tophys(rd, rs) addik rd, rs, 0 2001f84e1eaSMichal Simek #define tovirt(rd, rs) addik rd, rs, 0 2011f84e1eaSMichal Simek #else 2021f84e1eaSMichal Simek #define __virt_to_phys(addr) \ 2031f84e1eaSMichal Simek ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) 2041f84e1eaSMichal Simek #define __phys_to_virt(addr) \ 2051f84e1eaSMichal Simek ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) 2061f84e1eaSMichal Simek #define tophys(rd, rs) \ 2071f84e1eaSMichal Simek addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) 2081f84e1eaSMichal Simek #define tovirt(rd, rs) \ 2091f84e1eaSMichal Simek addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) 2101f84e1eaSMichal Simek #endif /* CONFIG_MMU */ 2114b87d7a4SMichal Simek 2124b87d7a4SMichal Simek #define TOPHYS(addr) __virt_to_phys(addr) 2134b87d7a4SMichal Simek 2141f84e1eaSMichal Simek #ifdef CONFIG_MMU 2151f84e1eaSMichal Simek #ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC 2161f84e1eaSMichal Simek #define WANT_PAGE_VIRTUAL 1 /* page alloc 2 relies on this */ 2171f84e1eaSMichal Simek #endif 2181f84e1eaSMichal Simek 2191f84e1eaSMichal Simek #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 2201f84e1eaSMichal Simek VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 2211f84e1eaSMichal Simek #endif /* CONFIG_MMU */ 2221f84e1eaSMichal Simek 2234b87d7a4SMichal Simek #endif /* __KERNEL__ */ 2244b87d7a4SMichal Simek 2254b87d7a4SMichal Simek #include <asm-generic/memory_model.h> 2265b17e1cdSArnd Bergmann #include <asm-generic/getorder.h> 2274b87d7a4SMichal Simek 2284b87d7a4SMichal Simek #endif /* _ASM_MICROBLAZE_PAGE_H */ 229