| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * 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. |
| */ |
| |
| #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 (ASM_CONST(1) << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| |
| #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) |
| |
| #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* MS be sure that SLAB allocates aligned objects */ |
| #define ARCH_DMA_MINALIGN L1_CACHE_BYTES |
| |
| #define ARCH_SLAB_MINALIGN L1_CACHE_BYTES |
| |
| /* |
| * 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_FMT "%.8lx" |
| |
| # define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
| # 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 */ |
| typedef struct { unsigned long pgd; } pgd_t; |
| |
| # define pte_val(x) ((x).pte) |
| # define pgprot_val(x) ((x).pgprot) |
| |
| # define pgd_val(x) ((x).pgd) |
| |
| # define __pte(x) ((pte_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_size; |
| extern unsigned long lowmem_size; |
| |
| extern unsigned long kernel_tlb; |
| |
| 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))) |
| |
| # 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) |
| |
| # define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) |
| # define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) |
| |
| # endif /* __ASSEMBLY__ */ |
| |
| #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) |
| |
| # define __pa(x) __virt_to_phys((unsigned long)(x)) |
| # define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) |
| |
| /* Convert between virtual and physical address for MMU. */ |
| /* Handle MicroBlaze processor with virtual memory. */ |
| #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) |
| |
| #define TOPHYS(addr) __virt_to_phys(addr) |
| |
| #endif /* __KERNEL__ */ |
| |
| #include <asm-generic/memory_model.h> |
| #include <asm-generic/getorder.h> |
| |
| #endif /* _ASM_MICROBLAZE_PAGE_H */ |