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/
usr/
src/
linux-headers-3.0.0-14/
arch/
m68k/
include/
asm/
- drwxr-xr-x
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Viewing file:  sun3mmu.h (4.87 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* 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__ */
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