| /* |
| * page.h: Various defines and such for MMU operations on the Sparc for |
| * the Linux kernel. |
| * |
| * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) |
| */ |
| |
| #ifndef _SPARC_PAGE_H |
| #define _SPARC_PAGE_H |
| |
| #include <linux/const.h> |
| |
| #define PAGE_SHIFT 12 |
| #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) |
| #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) |
| #define clear_user_page(addr, vaddr, page) \ |
| do { clear_page(addr); \ |
| sparc_flush_page_to_ram(page); \ |
| } while (0) |
| #define copy_user_page(to, from, vaddr, page) \ |
| do { copy_page(to, from); \ |
| sparc_flush_page_to_ram(page); \ |
| } while (0) |
| |
| /* The following structure is used to hold the physical |
| * memory configuration of the machine. This is filled in |
| * prom_meminit() and is later used by mem_init() to set up |
| * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of |
| * these structs, this is arbitrary. The entry after the |
| * last valid one has num_bytes==0. |
| */ |
| struct sparc_phys_banks { |
| unsigned long base_addr; |
| unsigned long num_bytes; |
| }; |
| |
| #define SPARC_PHYS_BANKS 32 |
| |
| extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; |
| |
| /* passing structs on the Sparc slow us down tremendously... */ |
| |
| /* #define STRICT_MM_TYPECHECKS */ |
| |
| #ifdef STRICT_MM_TYPECHECKS |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef struct { unsigned long pte; } pte_t; |
| typedef struct { unsigned long iopte; } iopte_t; |
| typedef struct { unsigned long pmdv[16]; } pmd_t; |
| typedef struct { unsigned long pgd; } pgd_t; |
| typedef struct { unsigned long ctxd; } ctxd_t; |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| typedef struct { unsigned long iopgprot; } iopgprot_t; |
| |
| #define pte_val(x) ((x).pte) |
| #define iopte_val(x) ((x).iopte) |
| #define pmd_val(x) ((x).pmdv[0]) |
| #define pgd_val(x) ((x).pgd) |
| #define ctxd_val(x) ((x).ctxd) |
| #define pgprot_val(x) ((x).pgprot) |
| #define iopgprot_val(x) ((x).iopgprot) |
| |
| #define __pte(x) ((pte_t) { (x) } ) |
| #define __pmd(x) ((pmd_t) { { (x) }, }) |
| #define __iopte(x) ((iopte_t) { (x) } ) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| #define __ctxd(x) ((ctxd_t) { (x) } ) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| #define __iopgprot(x) ((iopgprot_t) { (x) } ) |
| |
| #else |
| /* |
| * .. while these make it easier on the compiler |
| */ |
| typedef unsigned long pte_t; |
| typedef unsigned long iopte_t; |
| typedef struct { unsigned long pmdv[16]; } pmd_t; |
| typedef unsigned long pgd_t; |
| typedef unsigned long ctxd_t; |
| typedef unsigned long pgprot_t; |
| typedef unsigned long iopgprot_t; |
| |
| #define pte_val(x) (x) |
| #define iopte_val(x) (x) |
| #define pmd_val(x) ((x).pmdv[0]) |
| #define pgd_val(x) (x) |
| #define ctxd_val(x) (x) |
| #define pgprot_val(x) (x) |
| #define iopgprot_val(x) (x) |
| |
| #define __pte(x) (x) |
| #define __pmd(x) ((pmd_t) { { (x) }, }) |
| #define __iopte(x) (x) |
| #define __pgd(x) (x) |
| #define __ctxd(x) (x) |
| #define __pgprot(x) (x) |
| #define __iopgprot(x) (x) |
| |
| #endif |
| |
| typedef struct page *pgtable_t; |
| |
| #define TASK_UNMAPPED_BASE 0x50000000 |
| |
| #else /* !(__ASSEMBLY__) */ |
| |
| #define __pgprot(x) (x) |
| |
| #endif /* !(__ASSEMBLY__) */ |
| |
| #define PAGE_OFFSET 0xf0000000 |
| #ifndef __ASSEMBLY__ |
| extern unsigned long phys_base; |
| extern unsigned long pfn_base; |
| #endif |
| #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) |
| #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) |
| |
| #define virt_to_phys __pa |
| #define phys_to_virt __va |
| |
| #define ARCH_PFN_OFFSET (pfn_base) |
| #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
| |
| #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) |
| #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) |
| |
| #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #include <asm-generic/memory_model.h> |
| #include <asm-generic/getorder.h> |
| |
| #endif /* _SPARC_PAGE_H */ |