diff options
Diffstat (limited to 'arch/sparc/include/asm/page_32.h')
| -rw-r--r-- | arch/sparc/include/asm/page_32.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/page_32.h b/arch/sparc/include/asm/page_32.h new file mode 100644 index 00000000000..cf5fb70ca1c --- /dev/null +++ b/arch/sparc/include/asm/page_32.h @@ -0,0 +1,160 @@ +/* + * 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 + +#ifdef CONFIG_SUN4 +#define PAGE_SHIFT 13 +#else +#define PAGE_SHIFT 12 +#endif +#ifndef __ASSEMBLY__ +/* I have my suspicions... -DaveM */ +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#else +#define PAGE_SIZE (1 << PAGE_SHIFT) +#endif +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#include <asm/btfixup.h> + +#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]; + +/* Cache alias structure. Entry is valid if context != -1. */ +struct cache_palias { + unsigned long vaddr; + int context; +}; + +/* 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 __iopte(x) ((iopte_t) { (x) } ) +/* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ +#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 __iopte(x) (x) +/* #define __pmd(x) (x) */ /* XXX later */ +#define __pgd(x) (x) +#define __ctxd(x) (x) +#define __pgprot(x) (x) +#define __iopgprot(x) (x) + +#endif + +typedef struct page *pgtable_t; + +extern unsigned long sparc_unmapped_base; + +BTFIXUPDEF_SETHI(sparc_unmapped_base) + +#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) + +#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) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>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/page.h> + +#endif /* _SPARC_PAGE_H */ |