[linux-block.git] / arch / m68k / include / asm / sun3mmu.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* Definitions for Sun3 custom MMU.
	4	*/
	5	#ifndef __SUN3_MMU_H__
	6	#define __SUN3_MMU_H__
	7
cbff6766	8	#include <linux/types.h>
1da177e4 LT	9	#include <asm/movs.h>
	10	#include <asm/sun3-head.h>
	11
	12	/* MMU characteristics. */
	13	#define SUN3_SEGMAPS_PER_CONTEXT 2048
	14	#define SUN3_PMEGS_NUM 256
	15	#define SUN3_CONTEXTS_NUM 8
	16
	17	#define SUN3_PMEG_SIZE_BITS 17
	18	#define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
	19	#define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
	20
	21	#define SUN3_PTE_SIZE_BITS 13
	22	#define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
	23	#define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
	24
	25	#define SUN3_CONTROL_MASK (0x0FFFFFFC)
	26	#define SUN3_INVALID_PMEG 255
	27	#define SUN3_INVALID_CONTEXT 255
	28
	29	#define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
	30	#define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
	31	#define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
	32	#define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
	33	#define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
	34	#define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
	35	#define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
	36	#define AC_SYNC_ERR 0x60000000 /* c fault type */
	37	#define AC_SYNC_VA 0x60000004 /* c fault virtual address */
	38	#define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
	39	#define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
	40	#define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
	41	#define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
	42	#define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
	43	#define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
	44	#define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
	45	#define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
	46
	47	#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
	48	\| SUN3_PAGE_ACCESSED \| SUN3_PAGE_MODIFIED)
	49
	50	/* Bus access type within PTE. */
	51	#define SUN3_PAGE_TYPE_MASK (0x0c000000)
	52	#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
	53	#define SUN3_PAGE_TYPE_IO (0x04000000)
	54	#define SUN3_PAGE_TYPE_VME16 (0x08000000)
	55	#define SUN3_PAGE_TYPE_VME32 (0x0c000000)
	56
	57	/* Mask for page number within PTE. */
	58	#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
	59
	60	/* Bits within bus-error register. */
	61	#define SUN3_BUSERR_WATCHDOG (0x01)
	62	#define SUN3_BUSERR_unused (0x02)
	63	#define SUN3_BUSERR_FPAENERR (0x04)
	64	#define SUN3_BUSERR_FPABERR (0x08)
	65	#define SUN3_BUSERR_VMEBERR (0x10)
	66	#define SUN3_BUSERR_TIMEOUT (0x20)
	67	#define SUN3_BUSERR_PROTERR (0x40)
	68	#define SUN3_BUSERR_INVALID (0x80)
	69
	70	#ifndef __ASSEMBLY__
	71
	72	/* Read bus error status register (implicitly clearing it). */
73	static inline unsigned char sun3_get_buserr(void)
74	{
75	unsigned char sfc, c;
76
77	GET_SFC (sfc);
78	SET_SFC (FC_CONTROL);
79	GET_CONTROL_BYTE (AC_BUS_ERROR, c);
80	SET_SFC (sfc);
81
82	return c;
83	}
84
85	/* Read segmap from hardware MMU. */
86	static inline unsigned long sun3_get_segmap(unsigned long addr)
87	{
88	register unsigned long entry;
89	unsigned char c, sfc;
90
91	GET_SFC (sfc);
92	SET_SFC (FC_CONTROL);
93	GET_CONTROL_BYTE (AC_SEGMAP \| (addr & SUN3_CONTROL_MASK), c);
94	SET_SFC (sfc);
95	entry = c;
96
97	return entry;
98	}
99
100	/* Write segmap to hardware MMU. */
101	static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
102	{
103	unsigned char sfc;
104
105	GET_DFC (sfc);
106	SET_DFC (FC_CONTROL);
107	SET_CONTROL_BYTE (AC_SEGMAP \| (addr & SUN3_CONTROL_MASK), entry);
108	SET_DFC (sfc);
109
110	return;
111	}
112
113	/* Read PTE from hardware MMU. */
114	static inline unsigned long sun3_get_pte(unsigned long addr)
115	{
116	register unsigned long entry;
117	unsigned char sfc;
118
119	GET_SFC (sfc);
120	SET_SFC (FC_CONTROL);
121	GET_CONTROL_WORD (AC_PAGEMAP \| (addr & SUN3_CONTROL_MASK), entry);
122	SET_SFC (sfc);
123
124	return entry;
125	}
126
127	/* Write PTE to hardware MMU. */
128	static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
129	{
130	unsigned char sfc;
131
132	GET_DFC (sfc);
133	SET_DFC (FC_CONTROL);
134	SET_CONTROL_WORD (AC_PAGEMAP \| (addr & SUN3_CONTROL_MASK), entry);
135	SET_DFC (sfc);
136
137	return;
138	}
139
140	/* get current context */
141	static inline unsigned char sun3_get_context(void)
142	{
143	unsigned char sfc, c;
144
145	GET_SFC(sfc);
146	SET_SFC(FC_CONTROL);
147	GET_CONTROL_BYTE(AC_CONTEXT, c);
148	SET_SFC(sfc);
149
150	return c;
151	}
152
153	/* set alternate context */
154	static inline void sun3_put_context(unsigned char c)
155	{
156	unsigned char dfc;
157	GET_DFC(dfc);
158	SET_DFC(FC_CONTROL);
159	SET_CONTROL_BYTE(AC_CONTEXT, c);
160	SET_DFC(dfc);
161
162	return;
163	}
164
cbff6766	165	extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
1da177e4 LT	166	unsigned long type);
	167
	168	extern int sun3_map_test(unsigned long addr, char *val);
	169
	170	#endif /* !__ASSEMBLY__ */
	171
	172	#endif /* !__SUN3_MMU_H__ */