sun3mmu.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:5k
- /*
- * Definitions for Sun3 custom MMU.
- */
- #include <asm/movs.h>
- #ifndef __SUN3_MMU_H__
- #define __SUN3_MMU_H__
- #define FC_CONTROL 3
- /* 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). */
- extern __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. */
- extern __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. */
- extern __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. */
- extern __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. */
- extern __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 */
- extern __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 */
- extern __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;
- }
- #endif /* !__ASSEMBLY__ */
- #endif /* !__SUN3_MMU_H__ */