| #ifndef _M68K_PAGE_H |
| #define _M68K_PAGE_H |
| |
| #include <linux/const.h> |
| |
| /* PAGE_SHIFT determines the page size */ |
| #ifndef CONFIG_SUN3 |
| #define PAGE_SHIFT (12) |
| #else |
| #define PAGE_SHIFT (13) |
| #endif |
| #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| |
| #include <asm/setup.h> |
| |
| #if PAGE_SHIFT < 13 |
| #define THREAD_SIZE (8192) |
| #else |
| #define THREAD_SIZE PAGE_SIZE |
| #endif |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/compiler.h> |
| |
| #include <asm/module.h> |
| |
| #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) |
| #define free_user_page(page, addr) free_page(addr) |
| |
| /* |
| * We don't need to check for alignment etc. |
| */ |
| #ifdef CPU_M68040_OR_M68060_ONLY |
| static inline void copy_page(void *to, void *from) |
| { |
| unsigned long tmp; |
| |
| __asm__ __volatile__("1:\t" |
| ".chip 68040\n\t" |
| "move16 %1@+,%0@+\n\t" |
| "move16 %1@+,%0@+\n\t" |
| ".chip 68k\n\t" |
| "dbra %2,1b\n\t" |
| : "=a" (to), "=a" (from), "=d" (tmp) |
| : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) |
| ); |
| } |
| |
| static inline void clear_page(void *page) |
| { |
| unsigned long tmp; |
| unsigned long *sp = page; |
| |
| *sp++ = 0; |
| *sp++ = 0; |
| *sp++ = 0; |
| *sp++ = 0; |
| |
| __asm__ __volatile__("1:\t" |
| ".chip 68040\n\t" |
| "move16 %2@+,%0@+\n\t" |
| ".chip 68k\n\t" |
| "subqw #8,%2\n\t" |
| "subqw #8,%2\n\t" |
| "dbra %1,1b\n\t" |
| : "=a" (sp), "=d" (tmp) |
| : "a" (page), "0" (sp), |
| "1" ((PAGE_SIZE - 16) / 16 - 1)); |
| } |
| |
| #else |
| #define clear_page(page) memset((page), 0, PAGE_SIZE) |
| #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) |
| #endif |
| |
| #define clear_user_page(addr, vaddr, page) \ |
| do { clear_page(addr); \ |
| flush_dcache_page(page); \ |
| } while (0) |
| #define copy_user_page(to, from, vaddr, page) \ |
| do { copy_page(to, from); \ |
| flush_dcache_page(page); \ |
| } while (0) |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef struct { unsigned long pte; } pte_t; |
| typedef struct { unsigned long pmd[16]; } pmd_t; |
| typedef struct { unsigned long pgd; } pgd_t; |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| |
| #define pte_val(x) ((x).pte) |
| #define pmd_val(x) ((&x)->pmd[0]) |
| #define pgd_val(x) ((x).pgd) |
| #define pgprot_val(x) ((x).pgprot) |
| |
| #define __pte(x) ((pte_t) { (x) } ) |
| #define __pmd(x) ((pmd_t) { (x) } ) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| |
| /* to align the pointer to the (next) page boundary */ |
| #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #include <asm/page_offset.h> |
| |
| #define PAGE_OFFSET (PAGE_OFFSET_RAW) |
| |
| #ifndef __ASSEMBLY__ |
| |
| extern unsigned long m68k_memoffset; |
| |
| #ifndef CONFIG_SUN3 |
| |
| #define WANT_PAGE_VIRTUAL |
| |
| static inline unsigned long ___pa(void *vaddr) |
| { |
| unsigned long paddr; |
| asm ( |
| "1: addl #0,%0\n" |
| m68k_fixup(%c2, 1b+2) |
| : "=r" (paddr) |
| : "0" (vaddr), "i" (m68k_fixup_memoffset)); |
| return paddr; |
| } |
| #define __pa(vaddr) ___pa((void *)(vaddr)) |
| static inline void *__va(unsigned long paddr) |
| { |
| void *vaddr; |
| asm ( |
| "1: subl #0,%0\n" |
| m68k_fixup(%c2, 1b+2) |
| : "=r" (vaddr) |
| : "0" (paddr), "i" (m68k_fixup_memoffset)); |
| return vaddr; |
| } |
| |
| #else /* !CONFIG_SUN3 */ |
| /* This #define is a horrible hack to suppress lots of warnings. --m */ |
| #define __pa(x) ___pa((unsigned long)(x)) |
| static inline unsigned long ___pa(unsigned long x) |
| { |
| if(x == 0) |
| return 0; |
| if(x >= PAGE_OFFSET) |
| return (x-PAGE_OFFSET); |
| else |
| return (x+0x2000000); |
| } |
| |
| static inline void *__va(unsigned long x) |
| { |
| if(x == 0) |
| return (void *)0; |
| |
| if(x < 0x2000000) |
| return (void *)(x+PAGE_OFFSET); |
| else |
| return (void *)(x-0x2000000); |
| } |
| #endif /* CONFIG_SUN3 */ |
| |
| /* |
| * NOTE: virtual isn't really correct, actually it should be the offset into the |
| * memory node, but we have no highmem, so that works for now. |
| * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots |
| * of the shifts unnecessary. |
| */ |
| #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
| #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
| |
| extern int m68k_virt_to_node_shift; |
| |
| #ifdef CONFIG_SINGLE_MEMORY_CHUNK |
| #define __virt_to_node(addr) (&pg_data_map[0]) |
| #else |
| extern struct pglist_data *pg_data_table[]; |
| |
| static inline __attribute_const__ int __virt_to_node_shift(void) |
| { |
| int shift; |
| |
| asm ( |
| "1: moveq #0,%0\n" |
| m68k_fixup(%c1, 1b) |
| : "=d" (shift) |
| : "i" (m68k_fixup_vnode_shift)); |
| return shift; |
| } |
| |
| #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) |
| #endif |
| |
| #define virt_to_page(addr) ({ \ |
| pfn_to_page(virt_to_pfn(addr)); \ |
| }) |
| #define page_to_virt(page) ({ \ |
| pfn_to_virt(page_to_pfn(page)); \ |
| }) |
| |
| #define pfn_to_page(pfn) ({ \ |
| unsigned long __pfn = (pfn); \ |
| struct pglist_data *pgdat; \ |
| pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ |
| pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ |
| }) |
| #define page_to_pfn(_page) ({ \ |
| struct page *__p = (_page); \ |
| struct pglist_data *pgdat; \ |
| pgdat = &pg_data_map[page_to_nid(__p)]; \ |
| ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ |
| }) |
| |
| #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) |
| #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #include <asm-generic/page.h> |
| |
| #endif /* _M68K_PAGE_H */ |