14726dd60SMichal Simek /* SPDX-License-Identifier: GPL-2.0 */ 24b87d7a4SMichal Simek /* 31f84e1eaSMichal Simek * VM ops 41f84e1eaSMichal Simek * 51f84e1eaSMichal Simek * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 61f84e1eaSMichal Simek * Copyright (C) 2008-2009 PetaLogix 74b87d7a4SMichal Simek * Copyright (C) 2006 Atmark Techno, Inc. 84b87d7a4SMichal Simek * Changes for MMU support: 94b87d7a4SMichal Simek * Copyright (C) 2007 Xilinx, Inc. All rights reserved. 104b87d7a4SMichal Simek */ 114b87d7a4SMichal Simek 124b87d7a4SMichal Simek #ifndef _ASM_MICROBLAZE_PAGE_H 134b87d7a4SMichal Simek #define _ASM_MICROBLAZE_PAGE_H 144b87d7a4SMichal Simek 154b87d7a4SMichal Simek #include <linux/pfn.h> 164b87d7a4SMichal Simek #include <asm/setup.h> 17a1253977SJohn Williams #include <asm/asm-compat.h> 181f84e1eaSMichal Simek #include <linux/const.h> 191f84e1eaSMichal Simek 201f84e1eaSMichal Simek #ifdef __KERNEL__ 214b87d7a4SMichal Simek 224b87d7a4SMichal Simek /* PAGE_SHIFT determines the page size */ 236e80cff5SMichal Simek #if defined(CONFIG_MICROBLAZE_64K_PAGES) 246e80cff5SMichal Simek #define PAGE_SHIFT 16 25ba9c4f88SSteven J. Magnani #elif defined(CONFIG_MICROBLAZE_16K_PAGES) 26ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 14 27ba9c4f88SSteven J. Magnani #else 28ba9c4f88SSteven J. Magnani #define PAGE_SHIFT 12 29ba9c4f88SSteven J. Magnani #endif 30ba9c4f88SSteven J. Magnani #define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) 314b87d7a4SMichal Simek #define PAGE_MASK (~(PAGE_SIZE-1)) 324b87d7a4SMichal Simek 33a1253977SJohn Williams #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) 34a1253977SJohn Williams 359f78d3b5SMichal Simek #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ 369f78d3b5SMichal Simek 374b87d7a4SMichal Simek #ifndef __ASSEMBLY__ 384b87d7a4SMichal Simek 39de925d9dSMichal Simek /* MS be sure that SLAB allocates aligned objects */ 40a6eb9fe1SFUJITA Tomonori #define ARCH_DMA_MINALIGN L1_CACHE_BYTES 41de925d9dSMichal Simek 42ffe57d02SMichal Simek #define ARCH_SLAB_MINALIGN L1_CACHE_BYTES 43ffe57d02SMichal Simek 444b87d7a4SMichal Simek #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) 454b87d7a4SMichal Simek #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) 464b87d7a4SMichal Simek 471f84e1eaSMichal Simek #ifndef CONFIG_MMU 484b87d7a4SMichal Simek /* 494b87d7a4SMichal Simek * PAGE_OFFSET -- the first address of the first page of memory. When not 504b87d7a4SMichal Simek * using MMU this corresponds to the first free page in physical memory (aligned 514b87d7a4SMichal Simek * on a page boundary). 524b87d7a4SMichal Simek */ 534b87d7a4SMichal Simek extern unsigned int __page_offset; 544b87d7a4SMichal Simek #define PAGE_OFFSET __page_offset 554b87d7a4SMichal Simek 561f84e1eaSMichal Simek #else /* CONFIG_MMU */ 571f84e1eaSMichal Simek 581f84e1eaSMichal Simek /* 591f84e1eaSMichal Simek * PAGE_OFFSET -- the first address of the first page of memory. With MMU 601f84e1eaSMichal Simek * it is set to the kernel start address (aligned on a page boundary). 611f84e1eaSMichal Simek * 621f84e1eaSMichal Simek * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used 631f84e1eaSMichal Simek * in arch/microblaze/Makefile. 641f84e1eaSMichal Simek */ 651f84e1eaSMichal Simek #define PAGE_OFFSET CONFIG_KERNEL_START 661f84e1eaSMichal Simek 671f84e1eaSMichal Simek /* 681f84e1eaSMichal Simek * The basic type of a PTE - 32 bit physical addressing. 691f84e1eaSMichal Simek */ 701f84e1eaSMichal Simek typedef unsigned long pte_basic_t; 711f84e1eaSMichal Simek #define PTE_FMT "%.8lx" 721f84e1eaSMichal Simek 731f84e1eaSMichal Simek #endif /* CONFIG_MMU */ 741f84e1eaSMichal Simek 7543f2a6e8SMichal Simek # define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 764b87d7a4SMichal Simek # define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) 774b87d7a4SMichal Simek 784b87d7a4SMichal Simek # define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) 794b87d7a4SMichal Simek # define copy_user_page(vto, vfrom, vaddr, topg) \ 804b87d7a4SMichal Simek memcpy((vto), (vfrom), PAGE_SIZE) 814b87d7a4SMichal Simek 824b87d7a4SMichal Simek /* 834b87d7a4SMichal Simek * These are used to make use of C type-checking.. 844b87d7a4SMichal Simek */ 854b87d7a4SMichal Simek typedef struct page *pgtable_t; 864b87d7a4SMichal Simek typedef struct { unsigned long pte; } pte_t; 874b87d7a4SMichal Simek typedef struct { unsigned long pgprot; } pgprot_t; 881f84e1eaSMichal Simek /* FIXME this can depend on linux kernel version */ 891f84e1eaSMichal Simek # ifdef CONFIG_MMU 901f84e1eaSMichal Simek typedef struct { unsigned long pgd; } pgd_t; 911f84e1eaSMichal Simek # else /* CONFIG_MMU */ 924b87d7a4SMichal Simek typedef struct { unsigned long ste[64]; } pmd_t; 934b87d7a4SMichal Simek typedef struct { pmd_t pue[1]; } pud_t; 949849a569SKirill A. Shutemov typedef struct { pud_t p4e[1]; } p4d_t; 959849a569SKirill A. Shutemov typedef struct { p4d_t pge[1]; } pgd_t; 961f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 974b87d7a4SMichal Simek 984b87d7a4SMichal Simek # define pte_val(x) ((x).pte) 994b87d7a4SMichal Simek # define pgprot_val(x) ((x).pgprot) 1001f84e1eaSMichal Simek 1011f84e1eaSMichal Simek # ifdef CONFIG_MMU 1021f84e1eaSMichal Simek # define pgd_val(x) ((x).pgd) 1031f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1044b87d7a4SMichal Simek # define pmd_val(x) ((x).ste[0]) 1054b87d7a4SMichal Simek # define pud_val(x) ((x).pue[0]) 1064b87d7a4SMichal Simek # define pgd_val(x) ((x).pge[0]) 1071f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1084b87d7a4SMichal Simek 1094b87d7a4SMichal Simek # define __pte(x) ((pte_t) { (x) }) 1104b87d7a4SMichal Simek # define __pgd(x) ((pgd_t) { (x) }) 1114b87d7a4SMichal Simek # define __pgprot(x) ((pgprot_t) { (x) }) 1124b87d7a4SMichal Simek 1134b87d7a4SMichal Simek /** 1144b87d7a4SMichal Simek * Conversions for virtual address, physical address, pfn, and struct 1154b87d7a4SMichal Simek * page are defined in the following files. 1164b87d7a4SMichal Simek * 1174b87d7a4SMichal Simek * virt -+ 1184b87d7a4SMichal Simek * | asm-microblaze/page.h 1194b87d7a4SMichal Simek * phys -+ 1204b87d7a4SMichal Simek * | linux/pfn.h 1214b87d7a4SMichal Simek * pfn -+ 1224b87d7a4SMichal Simek * | asm-generic/memory_model.h 1234b87d7a4SMichal Simek * page -+ 1244b87d7a4SMichal Simek * 1254b87d7a4SMichal Simek */ 1264b87d7a4SMichal Simek 1274b87d7a4SMichal Simek extern unsigned long max_low_pfn; 1284b87d7a4SMichal Simek extern unsigned long min_low_pfn; 1294b87d7a4SMichal Simek extern unsigned long max_pfn; 1304b87d7a4SMichal Simek 1311f84e1eaSMichal Simek extern unsigned long memory_start; 1321f84e1eaSMichal Simek extern unsigned long memory_size; 1337c0d2615SMichal Simek extern unsigned long lowmem_size; 1341f84e1eaSMichal Simek 1350195c002SLinus Torvalds extern unsigned long kernel_tlb; 1361f84e1eaSMichal Simek 1371f84e1eaSMichal Simek extern int page_is_ram(unsigned long pfn); 1384b87d7a4SMichal Simek 1394b87d7a4SMichal Simek # define phys_to_pfn(phys) (PFN_DOWN(phys)) 1404b87d7a4SMichal Simek # define pfn_to_phys(pfn) (PFN_PHYS(pfn)) 1414b87d7a4SMichal Simek 1424b87d7a4SMichal Simek # define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) 1434b87d7a4SMichal Simek # define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) 1444b87d7a4SMichal Simek 1451f84e1eaSMichal Simek # ifdef CONFIG_MMU 146d79f3b06SMichal Simek 147d79f3b06SMichal Simek # define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)) 148d79f3b06SMichal Simek # define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) 149d79f3b06SMichal Simek # define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 150d79f3b06SMichal Simek 1511f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1524b87d7a4SMichal Simek # define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) 1534b87d7a4SMichal Simek # define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) 1544b87d7a4SMichal Simek # define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) 1554b87d7a4SMichal Simek # define page_to_bus(page) (page_to_phys(page)) 1564b87d7a4SMichal Simek # define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) 1571f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1584b87d7a4SMichal Simek 1591f84e1eaSMichal Simek # ifndef CONFIG_MMU 1605dd48a23Ssteve@digidescorp.com # define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \ 1615dd48a23Ssteve@digidescorp.com ((pfn) <= (min_low_pfn + max_mapnr))) 1624b87d7a4SMichal Simek # define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) 1631f84e1eaSMichal Simek # else /* CONFIG_MMU */ 1641f84e1eaSMichal Simek # define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) 1651f84e1eaSMichal Simek # define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) 1661f84e1eaSMichal Simek # endif /* CONFIG_MMU */ 1674b87d7a4SMichal Simek 1684b87d7a4SMichal Simek # endif /* __ASSEMBLY__ */ 1694b87d7a4SMichal Simek 1704b87d7a4SMichal Simek #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) 1714b87d7a4SMichal Simek 1721f84e1eaSMichal Simek # define __pa(x) __virt_to_phys((unsigned long)(x)) 1731f84e1eaSMichal Simek # define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) 1741f84e1eaSMichal Simek 1754b87d7a4SMichal Simek /* Convert between virtual and physical address for MMU. */ 1764b87d7a4SMichal Simek /* Handle MicroBlaze processor with virtual memory. */ 1771f84e1eaSMichal Simek #ifndef CONFIG_MMU 1784b87d7a4SMichal Simek #define __virt_to_phys(addr) addr 1794b87d7a4SMichal Simek #define __phys_to_virt(addr) addr 1801f84e1eaSMichal Simek #define tophys(rd, rs) addik rd, rs, 0 1811f84e1eaSMichal Simek #define tovirt(rd, rs) addik rd, rs, 0 1821f84e1eaSMichal Simek #else 1831f84e1eaSMichal Simek #define __virt_to_phys(addr) \ 1841f84e1eaSMichal Simek ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) 1851f84e1eaSMichal Simek #define __phys_to_virt(addr) \ 1861f84e1eaSMichal Simek ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) 1871f84e1eaSMichal Simek #define tophys(rd, rs) \ 1881f84e1eaSMichal Simek addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) 1891f84e1eaSMichal Simek #define tovirt(rd, rs) \ 1901f84e1eaSMichal Simek addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) 1911f84e1eaSMichal Simek #endif /* CONFIG_MMU */ 1924b87d7a4SMichal Simek 1934b87d7a4SMichal Simek #define TOPHYS(addr) __virt_to_phys(addr) 1944b87d7a4SMichal Simek 1951f84e1eaSMichal Simek #ifdef CONFIG_MMU 1961f84e1eaSMichal Simek 1971f84e1eaSMichal Simek #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 1981f84e1eaSMichal Simek VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 1991f84e1eaSMichal Simek #endif /* CONFIG_MMU */ 2001f84e1eaSMichal Simek 2014b87d7a4SMichal Simek #endif /* __KERNEL__ */ 2024b87d7a4SMichal Simek 2034b87d7a4SMichal Simek #include <asm-generic/memory_model.h> 2045b17e1cdSArnd Bergmann #include <asm-generic/getorder.h> 2054b87d7a4SMichal Simek 2064b87d7a4SMichal Simek #endif /* _ASM_MICROBLAZE_PAGE_H */ 207