1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2138ff346SGreg Ungerer #ifndef _M68K_PAGE_MM_H 3138ff346SGreg Ungerer #define _M68K_PAGE_MM_H 449148020SSam Ravnborg 549148020SSam Ravnborg #ifndef __ASSEMBLY__ 649148020SSam Ravnborg 749148020SSam Ravnborg #include <linux/compiler.h> 849148020SSam Ravnborg #include <asm/module.h> 949148020SSam Ravnborg 1049148020SSam Ravnborg /* 1149148020SSam Ravnborg * We don't need to check for alignment etc. 1249148020SSam Ravnborg */ 1349148020SSam Ravnborg #ifdef CPU_M68040_OR_M68060_ONLY 1449148020SSam Ravnborg static inline void copy_page(void *to, void *from) 1549148020SSam Ravnborg { 1649148020SSam Ravnborg unsigned long tmp; 1749148020SSam Ravnborg 1849148020SSam Ravnborg __asm__ __volatile__("1:\t" 1949148020SSam Ravnborg ".chip 68040\n\t" 2049148020SSam Ravnborg "move16 %1@+,%0@+\n\t" 2149148020SSam Ravnborg "move16 %1@+,%0@+\n\t" 2249148020SSam Ravnborg ".chip 68k\n\t" 2349148020SSam Ravnborg "dbra %2,1b\n\t" 2449148020SSam Ravnborg : "=a" (to), "=a" (from), "=d" (tmp) 2549148020SSam Ravnborg : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) 2649148020SSam Ravnborg ); 2749148020SSam Ravnborg } 2849148020SSam Ravnborg 2949148020SSam Ravnborg static inline void clear_page(void *page) 3049148020SSam Ravnborg { 3149148020SSam Ravnborg unsigned long tmp; 3249148020SSam Ravnborg unsigned long *sp = page; 3349148020SSam Ravnborg 3449148020SSam Ravnborg *sp++ = 0; 3549148020SSam Ravnborg *sp++ = 0; 3649148020SSam Ravnborg *sp++ = 0; 3749148020SSam Ravnborg *sp++ = 0; 3849148020SSam Ravnborg 3949148020SSam Ravnborg __asm__ __volatile__("1:\t" 4049148020SSam Ravnborg ".chip 68040\n\t" 4149148020SSam Ravnborg "move16 %2@+,%0@+\n\t" 4249148020SSam Ravnborg ".chip 68k\n\t" 4349148020SSam Ravnborg "subqw #8,%2\n\t" 4449148020SSam Ravnborg "subqw #8,%2\n\t" 4549148020SSam Ravnborg "dbra %1,1b\n\t" 4649148020SSam Ravnborg : "=a" (sp), "=d" (tmp) 4749148020SSam Ravnborg : "a" (page), "0" (sp), 4849148020SSam Ravnborg "1" ((PAGE_SIZE - 16) / 16 - 1)); 4949148020SSam Ravnborg } 5049148020SSam Ravnborg 5149148020SSam Ravnborg #else 5249148020SSam Ravnborg #define clear_page(page) memset((page), 0, PAGE_SIZE) 5349148020SSam Ravnborg #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 5449148020SSam Ravnborg #endif 5549148020SSam Ravnborg 5649148020SSam Ravnborg #define clear_user_page(addr, vaddr, page) \ 5749148020SSam Ravnborg do { clear_page(addr); \ 5849148020SSam Ravnborg flush_dcache_page(page); \ 5949148020SSam Ravnborg } while (0) 6049148020SSam Ravnborg #define copy_user_page(to, from, vaddr, page) \ 6149148020SSam Ravnborg do { copy_page(to, from); \ 6249148020SSam Ravnborg flush_dcache_page(page); \ 6349148020SSam Ravnborg } while (0) 6449148020SSam Ravnborg 6549148020SSam Ravnborg extern unsigned long m68k_memoffset; 6649148020SSam Ravnborg 6749148020SSam Ravnborg #ifndef CONFIG_SUN3 6849148020SSam Ravnborg 6949148020SSam Ravnborg #define WANT_PAGE_VIRTUAL 7049148020SSam Ravnborg 7149148020SSam Ravnborg static inline unsigned long ___pa(void *vaddr) 7249148020SSam Ravnborg { 7349148020SSam Ravnborg unsigned long paddr; 7449148020SSam Ravnborg asm ( 7549148020SSam Ravnborg "1: addl #0,%0\n" 7649148020SSam Ravnborg m68k_fixup(%c2, 1b+2) 7749148020SSam Ravnborg : "=r" (paddr) 7849148020SSam Ravnborg : "0" (vaddr), "i" (m68k_fixup_memoffset)); 7949148020SSam Ravnborg return paddr; 8049148020SSam Ravnborg } 8122e58f9dSAndrew Morton #define __pa(vaddr) ___pa((void *)(long)(vaddr)) 8249148020SSam Ravnborg static inline void *__va(unsigned long paddr) 8349148020SSam Ravnborg { 8449148020SSam Ravnborg void *vaddr; 8549148020SSam Ravnborg asm ( 8649148020SSam Ravnborg "1: subl #0,%0\n" 8749148020SSam Ravnborg m68k_fixup(%c2, 1b+2) 8849148020SSam Ravnborg : "=r" (vaddr) 8949148020SSam Ravnborg : "0" (paddr), "i" (m68k_fixup_memoffset)); 9049148020SSam Ravnborg return vaddr; 9149148020SSam Ravnborg } 9249148020SSam Ravnborg 9349148020SSam Ravnborg #else /* !CONFIG_SUN3 */ 9449148020SSam Ravnborg /* This #define is a horrible hack to suppress lots of warnings. --m */ 9549148020SSam Ravnborg #define __pa(x) ___pa((unsigned long)(x)) 9649148020SSam Ravnborg static inline unsigned long ___pa(unsigned long x) 9749148020SSam Ravnborg { 9849148020SSam Ravnborg if(x == 0) 9949148020SSam Ravnborg return 0; 10049148020SSam Ravnborg if(x >= PAGE_OFFSET) 10149148020SSam Ravnborg return (x-PAGE_OFFSET); 10249148020SSam Ravnborg else 10349148020SSam Ravnborg return (x+0x2000000); 10449148020SSam Ravnborg } 10549148020SSam Ravnborg 10649148020SSam Ravnborg static inline void *__va(unsigned long x) 10749148020SSam Ravnborg { 10849148020SSam Ravnborg if(x == 0) 10949148020SSam Ravnborg return (void *)0; 11049148020SSam Ravnborg 11149148020SSam Ravnborg if(x < 0x2000000) 11249148020SSam Ravnborg return (void *)(x+PAGE_OFFSET); 11349148020SSam Ravnborg else 11449148020SSam Ravnborg return (void *)(x-0x2000000); 11549148020SSam Ravnborg } 11649148020SSam Ravnborg #endif /* CONFIG_SUN3 */ 11749148020SSam Ravnborg 11849148020SSam Ravnborg /* 11949148020SSam Ravnborg * NOTE: virtual isn't really correct, actually it should be the offset into the 12049148020SSam Ravnborg * memory node, but we have no highmem, so that works for now. 12149148020SSam Ravnborg * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots 12249148020SSam Ravnborg * of the shifts unnecessary. 12349148020SSam Ravnborg */ 12449148020SSam Ravnborg #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 12549148020SSam Ravnborg #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 12649148020SSam Ravnborg 12749148020SSam Ravnborg extern int m68k_virt_to_node_shift; 12849148020SSam Ravnborg 12949148020SSam Ravnborg #ifdef CONFIG_SINGLE_MEMORY_CHUNK 13049148020SSam Ravnborg #define __virt_to_node(addr) (&pg_data_map[0]) 13149148020SSam Ravnborg #else 13249148020SSam Ravnborg extern struct pglist_data *pg_data_table[]; 13349148020SSam Ravnborg 13449148020SSam Ravnborg static inline __attribute_const__ int __virt_to_node_shift(void) 13549148020SSam Ravnborg { 13649148020SSam Ravnborg int shift; 13749148020SSam Ravnborg 13849148020SSam Ravnborg asm ( 13949148020SSam Ravnborg "1: moveq #0,%0\n" 14049148020SSam Ravnborg m68k_fixup(%c1, 1b) 14149148020SSam Ravnborg : "=d" (shift) 14249148020SSam Ravnborg : "i" (m68k_fixup_vnode_shift)); 14349148020SSam Ravnborg return shift; 14449148020SSam Ravnborg } 14549148020SSam Ravnborg 14649148020SSam Ravnborg #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) 14749148020SSam Ravnborg #endif 14849148020SSam Ravnborg 14949148020SSam Ravnborg #define virt_to_page(addr) ({ \ 15049148020SSam Ravnborg pfn_to_page(virt_to_pfn(addr)); \ 15149148020SSam Ravnborg }) 15249148020SSam Ravnborg #define page_to_virt(page) ({ \ 15349148020SSam Ravnborg pfn_to_virt(page_to_pfn(page)); \ 15449148020SSam Ravnborg }) 15549148020SSam Ravnborg 15649148020SSam Ravnborg #define pfn_to_page(pfn) ({ \ 15749148020SSam Ravnborg unsigned long __pfn = (pfn); \ 15849148020SSam Ravnborg struct pglist_data *pgdat; \ 15949148020SSam Ravnborg pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ 16049148020SSam Ravnborg pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ 16149148020SSam Ravnborg }) 16249148020SSam Ravnborg #define page_to_pfn(_page) ({ \ 163ba8f3184SIan Campbell const struct page *__p = (_page); \ 16449148020SSam Ravnborg struct pglist_data *pgdat; \ 16549148020SSam Ravnborg pgdat = &pg_data_map[page_to_nid(__p)]; \ 16649148020SSam Ravnborg ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ 16749148020SSam Ravnborg }) 16849148020SSam Ravnborg 16949148020SSam Ravnborg #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) 17049148020SSam Ravnborg #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) 17149148020SSam Ravnborg 17249148020SSam Ravnborg #endif /* __ASSEMBLY__ */ 17349148020SSam Ravnborg 174138ff346SGreg Ungerer #endif /* _M68K_PAGE_MM_H */ 175