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
copy_page(void * to,void * from)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)
25*0a29dfeaSGeert Uytterhoeven : "0" (to), "1" (from), "2" (PAGE_SIZE / 32 - 1));
2649148020SSam Ravnborg }
2749148020SSam Ravnborg
clear_page(void * page)2849148020SSam Ravnborg static inline void clear_page(void *page)
2949148020SSam Ravnborg {
3049148020SSam Ravnborg unsigned long tmp;
3149148020SSam Ravnborg unsigned long *sp = page;
3249148020SSam Ravnborg
3349148020SSam Ravnborg *sp++ = 0;
3449148020SSam Ravnborg *sp++ = 0;
3549148020SSam Ravnborg *sp++ = 0;
3649148020SSam Ravnborg *sp++ = 0;
3749148020SSam Ravnborg
3849148020SSam Ravnborg __asm__ __volatile__("1:\t"
3949148020SSam Ravnborg ".chip 68040\n\t"
4049148020SSam Ravnborg "move16 %2@+,%0@+\n\t"
4149148020SSam Ravnborg ".chip 68k\n\t"
4249148020SSam Ravnborg "subqw #8,%2\n\t"
4349148020SSam Ravnborg "subqw #8,%2\n\t"
4449148020SSam Ravnborg "dbra %1,1b\n\t"
4549148020SSam Ravnborg : "=a" (sp), "=d" (tmp)
4649148020SSam Ravnborg : "a" (page), "0" (sp),
4749148020SSam Ravnborg "1" ((PAGE_SIZE - 16) / 16 - 1));
4849148020SSam Ravnborg }
4949148020SSam Ravnborg
5049148020SSam Ravnborg #else
5149148020SSam Ravnborg #define clear_page(page) memset((page), 0, PAGE_SIZE)
5249148020SSam Ravnborg #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
5349148020SSam Ravnborg #endif
5449148020SSam Ravnborg
5549148020SSam Ravnborg #define clear_user_page(addr, vaddr, page) \
5649148020SSam Ravnborg do { clear_page(addr); \
5749148020SSam Ravnborg flush_dcache_page(page); \
5849148020SSam Ravnborg } while (0)
5949148020SSam Ravnborg #define copy_user_page(to, from, vaddr, page) \
6049148020SSam Ravnborg do { copy_page(to, from); \
6149148020SSam Ravnborg flush_dcache_page(page); \
6249148020SSam Ravnborg } while (0)
6349148020SSam Ravnborg
6449148020SSam Ravnborg extern unsigned long m68k_memoffset;
6549148020SSam Ravnborg
6649148020SSam Ravnborg #ifndef CONFIG_SUN3
6749148020SSam Ravnborg
6849148020SSam Ravnborg #define WANT_PAGE_VIRTUAL
6949148020SSam Ravnborg
___pa(void * vaddr)7049148020SSam Ravnborg static inline unsigned long ___pa(void *vaddr)
7149148020SSam Ravnborg {
7249148020SSam Ravnborg unsigned long paddr;
7349148020SSam Ravnborg asm (
7449148020SSam Ravnborg "1: addl #0,%0\n"
7549148020SSam Ravnborg m68k_fixup(%c2, 1b+2)
7649148020SSam Ravnborg : "=r" (paddr)
7749148020SSam Ravnborg : "0" (vaddr), "i" (m68k_fixup_memoffset));
7849148020SSam Ravnborg return paddr;
7949148020SSam Ravnborg }
8022e58f9dSAndrew Morton #define __pa(vaddr) ___pa((void *)(long)(vaddr))
__va(unsigned long paddr)8149148020SSam Ravnborg static inline void *__va(unsigned long paddr)
8249148020SSam Ravnborg {
8349148020SSam Ravnborg void *vaddr;
8449148020SSam Ravnborg asm (
8549148020SSam Ravnborg "1: subl #0,%0\n"
8649148020SSam Ravnborg m68k_fixup(%c2, 1b+2)
8749148020SSam Ravnborg : "=r" (vaddr)
8849148020SSam Ravnborg : "0" (paddr), "i" (m68k_fixup_memoffset));
8949148020SSam Ravnborg return vaddr;
9049148020SSam Ravnborg }
9149148020SSam Ravnborg
9249148020SSam Ravnborg #else /* !CONFIG_SUN3 */
9349148020SSam Ravnborg /* This #define is a horrible hack to suppress lots of warnings. --m */
9449148020SSam Ravnborg #define __pa(x) ___pa((unsigned long)(x))
___pa(unsigned long x)9549148020SSam Ravnborg static inline unsigned long ___pa(unsigned long x)
9649148020SSam Ravnborg {
9749148020SSam Ravnborg if (x == 0)
9849148020SSam Ravnborg return 0;
9949148020SSam Ravnborg if (x >= PAGE_OFFSET)
10049148020SSam Ravnborg return (x - PAGE_OFFSET);
10149148020SSam Ravnborg else
10249148020SSam Ravnborg return (x + 0x2000000);
10349148020SSam Ravnborg }
10449148020SSam Ravnborg
__va(unsigned long x)10549148020SSam Ravnborg static inline void *__va(unsigned long x)
10649148020SSam Ravnborg {
10749148020SSam Ravnborg if (x == 0)
10849148020SSam Ravnborg return (void *)0;
10949148020SSam Ravnborg
11049148020SSam Ravnborg if (x < 0x2000000)
11149148020SSam Ravnborg return (void *)(x + PAGE_OFFSET);
11249148020SSam Ravnborg else
11349148020SSam Ravnborg return (void *)(x - 0x2000000);
11449148020SSam Ravnborg }
11549148020SSam Ravnborg #endif /* CONFIG_SUN3 */
11649148020SSam Ravnborg
11749148020SSam Ravnborg /*
11849148020SSam Ravnborg * NOTE: virtual isn't really correct, actually it should be the offset into the
11949148020SSam Ravnborg * memory node, but we have no highmem, so that works for now.
12049148020SSam Ravnborg * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
12149148020SSam Ravnborg * of the shifts unnecessary.
12249148020SSam Ravnborg */
virt_to_pfn(const void * kaddr)123ef7d0f5dSLinus Walleij static inline unsigned long virt_to_pfn(const void *kaddr)
124ef7d0f5dSLinus Walleij {
125ef7d0f5dSLinus Walleij return __pa(kaddr) >> PAGE_SHIFT;
126ef7d0f5dSLinus Walleij }
127ef7d0f5dSLinus Walleij
pfn_to_virt(unsigned long pfn)128ef7d0f5dSLinus Walleij static inline void *pfn_to_virt(unsigned long pfn)
129ef7d0f5dSLinus Walleij {
130ef7d0f5dSLinus Walleij return __va(pfn << PAGE_SHIFT);
131ef7d0f5dSLinus Walleij }
13249148020SSam Ravnborg
13349148020SSam Ravnborg extern int m68k_virt_to_node_shift;
13449148020SSam Ravnborg
13549148020SSam Ravnborg #define virt_to_page(addr) ({ \
13649148020SSam Ravnborg pfn_to_page(virt_to_pfn(addr)); \
13749148020SSam Ravnborg })
13849148020SSam Ravnborg #define page_to_virt(page) ({ \
13949148020SSam Ravnborg pfn_to_virt(page_to_pfn(page)); \
14049148020SSam Ravnborg })
14149148020SSam Ravnborg
142d2bd44c4SAngelo Dureghello #define ARCH_PFN_OFFSET (m68k_memory[0].addr >> PAGE_SHIFT)
14349148020SSam Ravnborg
144a65a802aSGeert Uytterhoeven #define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
14549148020SSam Ravnborg #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
14649148020SSam Ravnborg
14749148020SSam Ravnborg #endif /* __ASSEMBLY__ */
14849148020SSam Ravnborg
149138ff346SGreg Ungerer #endif /* _M68K_PAGE_MM_H */
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