[mirror_ubuntu-bionic-kernel.git] / arch / m68k / include / asm / page_mm.h

#ifndef _M68K_PAGE_MM_H
#define _M68K_PAGE_MM_H

#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)

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)

#endif /* _M68K_PAGE_MM_H */
Commit	Line	Data
138ff346 GU	1	#ifndef _M68K_PAGE_MM_H
138ff346 GU	2	#define _M68K_PAGE_MM_H
1da177e4	3
1da177e4 LT	4	#ifndef __ASSEMBLY__
1da177e4 LT	5
4f855897	6	#include <linux/compiler.h>
fbe9c961 RZ	7	#include <asm/module.h>
fbe9c961 RZ	8
1da177e4 LT	9	#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
	10	#define free_user_page(page, addr) free_page(addr)
	11
	12	/*
	13	* We don't need to check for alignment etc.
	14	*/
	15	#ifdef CPU_M68040_OR_M68060_ONLY
	16	static inline void copy_page(void to, void from)
	17	{
	18	unsigned long tmp;
	19
	20	__asm__ __volatile__("1:\t"
	21	".chip 68040\n\t"
	22	"move16 %1@+,%0@+\n\t"
	23	"move16 %1@+,%0@+\n\t"
	24	".chip 68k\n\t"
	25	"dbra %2,1b\n\t"
	26	: "=a" (to), "=a" (from), "=d" (tmp)
	27	: "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
	28	);
	29	}
	30
	31	static inline void clear_page(void *page)
	32	{
	33	unsigned long tmp;
	34	unsigned long *sp = page;
	35
	36	*sp++ = 0;
	37	*sp++ = 0;
	38	*sp++ = 0;
	39	*sp++ = 0;
	40
	41	__asm__ __volatile__("1:\t"
	42	".chip 68040\n\t"
	43	"move16 %2@+,%0@+\n\t"
	44	".chip 68k\n\t"
	45	"subqw #8,%2\n\t"
	46	"subqw #8,%2\n\t"
	47	"dbra %1,1b\n\t"
	48	: "=a" (sp), "=d" (tmp)
	49	: "a" (page), "0" (sp),
	50	"1" ((PAGE_SIZE - 16) / 16 - 1));
	51	}
	52
	53	#else
	54	#define clear_page(page) memset((page), 0, PAGE_SIZE)
	55	#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
	56	#endif
	57
	58	#define clear_user_page(addr, vaddr, page) \
	59	do { clear_page(addr); \
	60	flush_dcache_page(page); \
	61	} while (0)
	62	#define copy_user_page(to, from, vaddr, page) \
	63	do { copy_page(to, from); \
	64	flush_dcache_page(page); \
	65	} while (0)
	66
fbe9c961 RZ	67	extern unsigned long m68k_memoffset;
fbe9c961 RZ	68
1da177e4 LT	69	#ifndef CONFIG_SUN3
	70
	71	#define WANT_PAGE_VIRTUAL
1da177e4	72
fbe9c961 RZ	73	static inline unsigned long ___pa(void *vaddr)
	74	{
	75	unsigned long paddr;
	76	asm (
	77	"1: addl #0,%0\n"
	78	m68k_fixup(%c2, 1b+2)
	79	: "=r" (paddr)
	80	: "0" (vaddr), "i" (m68k_fixup_memoffset));
	81	return paddr;
	82	}
12d810c1	83	#define __pa(vaddr) ___pa((void *)(vaddr))
fbe9c961 RZ	84	static inline void *__va(unsigned long paddr)
	85	{
	86	void *vaddr;
	87	asm (
	88	"1: subl #0,%0\n"
	89	m68k_fixup(%c2, 1b+2)
	90	: "=r" (vaddr)
	91	: "0" (paddr), "i" (m68k_fixup_memoffset));
	92	return vaddr;
	93	}
	94
1da177e4 LT	95	#else /* !CONFIG_SUN3 */
1da177e4 LT	96	/* This #define is a horrible hack to suppress lots of warnings. --m */
40bb0c3e	97	#define __pa(x) ___pa((unsigned long)(x))
1da177e4 LT	98	static inline unsigned long ___pa(unsigned long x)
	99	{
	100	if(x == 0)
	101	return 0;
	102	if(x >= PAGE_OFFSET)
	103	return (x-PAGE_OFFSET);
	104	else
	105	return (x+0x2000000);
	106	}
	107
	108	static inline void *__va(unsigned long x)
	109	{
	110	if(x == 0)
	111	return (void *)0;
	112
	113	if(x < 0x2000000)
	114	return (void *)(x+PAGE_OFFSET);
	115	else
	116	return (void *)(x-0x2000000);
	117	}
	118	#endif /* CONFIG_SUN3 */
	119
	120	/*
	121	* NOTE: virtual isn't really correct, actually it should be the offset into the
	122	* memory node, but we have no highmem, so that works for now.
	123	* TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
	124	* of the shifts unnecessary.
	125	*/
	126	#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
	127	#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
	128
12d810c1 RZ	129	extern int m68k_virt_to_node_shift;
	130
	131	#ifdef CONFIG_SINGLE_MEMORY_CHUNK
	132	#define __virt_to_node(addr) (&pg_data_map[0])
	133	#else
	134	extern struct pglist_data *pg_data_table[];
	135
	136	static inline __attribute_const__ int __virt_to_node_shift(void)
	137	{
	138	int shift;
	139
	140	asm (
	141	"1: moveq #0,%0\n"
	142	m68k_fixup(%c1, 1b)
	143	: "=d" (shift)
	144	: "i" (m68k_fixup_vnode_shift));
	145	return shift;
	146	}
	147
	148	#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
	149	#endif
1da177e4	150
12d810c1 RZ	151	#define virt_to_page(addr) ({ \
	152	pfn_to_page(virt_to_pfn(addr)); \
	153	})
	154	#define page_to_virt(page) ({ \
	155	pfn_to_virt(page_to_pfn(page)); \
	156	})
	157
	158	#define pfn_to_page(pfn) ({ \
	159	unsigned long __pfn = (pfn); \
	160	struct pglist_data *pgdat; \
	161	pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \
	162	pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \
	163	})
	164	#define page_to_pfn(_page) ({ \
	165	struct page *__p = (_page); \
	166	struct pglist_data *pgdat; \
	167	pgdat = &pg_data_map[page_to_nid(__p)]; \
	168	((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
	169	})
1da177e4 LT	170
	171	#define virt_addr_valid(kaddr) ((void )(kaddr) >= (void )PAGE_OFFSET && (void *)(kaddr) < high_memory)
	172	#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
	173
	174	#endif /* __ASSEMBLY__ */
	175
	176	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	177	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	178
138ff346	179	#endif /* _M68K_PAGE_MM_H */