[net-next-2.6.git] / arch / m68k / include / asm / sun3mmu.h

/*
 * Definitions for Sun3 custom MMU.
 */
#ifndef __SUN3_MMU_H__
#define __SUN3_MMU_H__

#include <linux/types.h>
#include <asm/movs.h>
#include <asm/sun3-head.h>

/* MMU characteristics. */
#define SUN3_SEGMAPS_PER_CONTEXT	2048
#define SUN3_PMEGS_NUM			256
#define SUN3_CONTEXTS_NUM               8

#define SUN3_PMEG_SIZE_BITS	 17
#define SUN3_PMEG_SIZE		 (1 << SUN3_PMEG_SIZE_BITS)
#define SUN3_PMEG_MASK		 (SUN3_PMEG_SIZE - 1)

#define SUN3_PTE_SIZE_BITS       13
#define SUN3_PTE_SIZE		 (1 << SUN3_PTE_SIZE_BITS)
#define SUN3_PTE_MASK		 (SUN3_PTE_SIZE - 1)

#define SUN3_CONTROL_MASK       (0x0FFFFFFC)
#define SUN3_INVALID_PMEG	255
#define SUN3_INVALID_CONTEXT 255

#define AC_IDPROM     0x00000000    /* 34  ID PROM, R/O, byte, 32 bytes      */
#define AC_PAGEMAP    0x10000000    /* 3   Pagemap R/W, long                 */
#define AC_SEGMAP     0x20000000    /* 3   Segment map, byte                 */
#define AC_CONTEXT    0x30000000    /* 34c current mmu-context               */
#define AC_SENABLE    0x40000000    /* 34c system dvma/cache/reset enable reg*/
#define AC_UDVMA_ENB  0x50000000    /* 34  Not used on Sun boards, byte      */
#define AC_BUS_ERROR  0x60000000    /* 34  Cleared on read, byte.            */
#define AC_SYNC_ERR   0x60000000    /*   c fault type                        */
#define AC_SYNC_VA    0x60000004    /*   c fault virtual address             */
#define AC_ASYNC_ERR  0x60000008    /*   c asynchronous fault type           */
#define AC_ASYNC_VA   0x6000000c    /*   c async fault virtual address       */
#define AC_LEDS       0x70000000    /* 34  Zero turns on LEDs, byte          */
#define AC_CACHETAGS  0x80000000    /* 34c direct access to the VAC tags     */
#define AC_CACHEDDATA 0x90000000    /* 3 c direct access to the VAC data     */
#define AC_UDVMA_MAP  0xD0000000    /* 4   Not used on Sun boards, byte      */
#define AC_VME_VECTOR 0xE0000000    /* 4   For non-Autovector VME, byte      */
#define AC_BOOT_SCC   0xF0000000    /* 34  bypass to access Zilog 8530. byte.*/

#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
			    | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)

/* Bus access type within PTE. */
#define SUN3_PAGE_TYPE_MASK   (0x0c000000)
#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
#define SUN3_PAGE_TYPE_IO     (0x04000000)
#define SUN3_PAGE_TYPE_VME16  (0x08000000)
#define SUN3_PAGE_TYPE_VME32  (0x0c000000)

/* Mask for page number within PTE. */
#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)

/* Bits within bus-error register. */
#define SUN3_BUSERR_WATCHDOG	(0x01)
#define SUN3_BUSERR_unused	(0x02)
#define SUN3_BUSERR_FPAENERR	(0x04)
#define SUN3_BUSERR_FPABERR	(0x08)
#define SUN3_BUSERR_VMEBERR	(0x10)
#define SUN3_BUSERR_TIMEOUT	(0x20)
#define SUN3_BUSERR_PROTERR	(0x40)
#define SUN3_BUSERR_INVALID	(0x80)

#ifndef __ASSEMBLY__

/* Read bus error status register (implicitly clearing it). */
static inline unsigned char sun3_get_buserr(void)
{
	unsigned char sfc, c;

	GET_SFC (sfc);
	SET_SFC (FC_CONTROL);
	GET_CONTROL_BYTE (AC_BUS_ERROR, c);
	SET_SFC (sfc);

	return c;
}

/* Read segmap from hardware MMU. */
static inline unsigned long sun3_get_segmap(unsigned long addr)
{
        register unsigned long entry;
        unsigned char c, sfc;

        GET_SFC (sfc);
        SET_SFC (FC_CONTROL);
        GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
        SET_SFC (sfc);
        entry = c;

        return entry;
}

/* Write segmap to hardware MMU. */
static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
{
        unsigned char sfc;

        GET_DFC (sfc);
        SET_DFC (FC_CONTROL);
        SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
	SET_DFC (sfc);

        return;
}

/* Read PTE from hardware MMU. */
static inline unsigned long sun3_get_pte(unsigned long addr)
{
        register unsigned long entry;
        unsigned char sfc;

        GET_SFC (sfc);
        SET_SFC (FC_CONTROL);
        GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
        SET_SFC (sfc);

        return entry;
}

/* Write PTE to hardware MMU. */
static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
{
        unsigned char sfc;

        GET_DFC (sfc);
        SET_DFC (FC_CONTROL);
        SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
	SET_DFC (sfc);

        return;
}

/* get current context */
static inline unsigned char sun3_get_context(void)
{
	unsigned char sfc, c;

	GET_SFC(sfc);
	SET_SFC(FC_CONTROL);
	GET_CONTROL_BYTE(AC_CONTEXT, c);
	SET_SFC(sfc);

	return c;
}

/* set alternate context */
static inline void sun3_put_context(unsigned char c)
{
	unsigned char dfc;
	GET_DFC(dfc);
	SET_DFC(FC_CONTROL);
	SET_CONTROL_BYTE(AC_CONTEXT, c);
	SET_DFC(dfc);

	return;
}

extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
			  unsigned long type);

extern int sun3_map_test(unsigned long addr, char *val);

#endif	/* !__ASSEMBLY__ */

#endif	/* !__SUN3_MMU_H__ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Definitions for Sun3 custom MMU.
	3	*/
	4	#ifndef __SUN3_MMU_H__
	5	#define __SUN3_MMU_H__
	6
cbff6766	7	#include <linux/types.h>
1da177e4 LT	8	#include <asm/movs.h>
	9	#include <asm/sun3-head.h>
	10
	11	/* MMU characteristics. */
	12	#define SUN3_SEGMAPS_PER_CONTEXT 2048
	13	#define SUN3_PMEGS_NUM 256
	14	#define SUN3_CONTEXTS_NUM 8
	15
	16	#define SUN3_PMEG_SIZE_BITS 17
	17	#define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
	18	#define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
	19
	20	#define SUN3_PTE_SIZE_BITS 13
	21	#define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
	22	#define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
	23
	24	#define SUN3_CONTROL_MASK (0x0FFFFFFC)
	25	#define SUN3_INVALID_PMEG 255
	26	#define SUN3_INVALID_CONTEXT 255
	27
	28	#define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
	29	#define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
	30	#define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
	31	#define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
	32	#define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
	33	#define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
	34	#define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
	35	#define AC_SYNC_ERR 0x60000000 /* c fault type */
	36	#define AC_SYNC_VA 0x60000004 /* c fault virtual address */
	37	#define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
	38	#define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
	39	#define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
	40	#define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
	41	#define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
	42	#define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
	43	#define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
	44	#define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
	45
	46	#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
	47	\| SUN3_PAGE_ACCESSED \| SUN3_PAGE_MODIFIED)
	48
	49	/* Bus access type within PTE. */
	50	#define SUN3_PAGE_TYPE_MASK (0x0c000000)
	51	#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
	52	#define SUN3_PAGE_TYPE_IO (0x04000000)
	53	#define SUN3_PAGE_TYPE_VME16 (0x08000000)
	54	#define SUN3_PAGE_TYPE_VME32 (0x0c000000)
	55
	56	/* Mask for page number within PTE. */
	57	#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
	58
	59	/* Bits within bus-error register. */
	60	#define SUN3_BUSERR_WATCHDOG (0x01)
	61	#define SUN3_BUSERR_unused (0x02)
	62	#define SUN3_BUSERR_FPAENERR (0x04)
	63	#define SUN3_BUSERR_FPABERR (0x08)
	64	#define SUN3_BUSERR_VMEBERR (0x10)
	65	#define SUN3_BUSERR_TIMEOUT (0x20)
	66	#define SUN3_BUSERR_PROTERR (0x40)
	67	#define SUN3_BUSERR_INVALID (0x80)
	68
	69	#ifndef __ASSEMBLY__
	70
	71	/* Read bus error status register (implicitly clearing it). */
72	static inline unsigned char sun3_get_buserr(void)
73	{
74	unsigned char sfc, c;
75
76	GET_SFC (sfc);
77	SET_SFC (FC_CONTROL);
78	GET_CONTROL_BYTE (AC_BUS_ERROR, c);
79	SET_SFC (sfc);
80
81	return c;
82	}
83
84	/* Read segmap from hardware MMU. */
85	static inline unsigned long sun3_get_segmap(unsigned long addr)
86	{
87	register unsigned long entry;
88	unsigned char c, sfc;
89
90	GET_SFC (sfc);
91	SET_SFC (FC_CONTROL);
92	GET_CONTROL_BYTE (AC_SEGMAP \| (addr & SUN3_CONTROL_MASK), c);
93	SET_SFC (sfc);
94	entry = c;
95
96	return entry;
97	}
98
99	/* Write segmap to hardware MMU. */
100	static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
101	{
102	unsigned char sfc;
103
104	GET_DFC (sfc);
105	SET_DFC (FC_CONTROL);
106	SET_CONTROL_BYTE (AC_SEGMAP \| (addr & SUN3_CONTROL_MASK), entry);
107	SET_DFC (sfc);
108
109	return;
110	}
111
112	/* Read PTE from hardware MMU. */
113	static inline unsigned long sun3_get_pte(unsigned long addr)
114	{
115	register unsigned long entry;
116	unsigned char sfc;
117
118	GET_SFC (sfc);
119	SET_SFC (FC_CONTROL);
120	GET_CONTROL_WORD (AC_PAGEMAP \| (addr & SUN3_CONTROL_MASK), entry);
121	SET_SFC (sfc);
122
123	return entry;
124	}
125
126	/* Write PTE to hardware MMU. */
127	static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
128	{
129	unsigned char sfc;
130
131	GET_DFC (sfc);
132	SET_DFC (FC_CONTROL);
133	SET_CONTROL_WORD (AC_PAGEMAP \| (addr & SUN3_CONTROL_MASK), entry);
134	SET_DFC (sfc);
135
136	return;
137	}
138
139	/* get current context */
140	static inline unsigned char sun3_get_context(void)
141	{
142	unsigned char sfc, c;
143
144	GET_SFC(sfc);
145	SET_SFC(FC_CONTROL);
146	GET_CONTROL_BYTE(AC_CONTEXT, c);
147	SET_SFC(sfc);
148
149	return c;
150	}
151
152	/* set alternate context */
153	static inline void sun3_put_context(unsigned char c)
154	{
155	unsigned char dfc;
156	GET_DFC(dfc);
157	SET_DFC(FC_CONTROL);
158	SET_CONTROL_BYTE(AC_CONTEXT, c);
159	SET_DFC(dfc);
160
161	return;
162	}
163
cbff6766	164	extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
1da177e4 LT	165	unsigned long type);
	166
	167	extern int sun3_map_test(unsigned long addr, char *val);
	168
	169	#endif /* !__ASSEMBLY__ */
	170
	171	#endif /* !__SUN3_MMU_H__ */