1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 249148020SSam Ravnborg /* 349148020SSam Ravnborg * Definitions for Sun3 custom MMU. 449148020SSam Ravnborg */ 549148020SSam Ravnborg #ifndef __SUN3_MMU_H__ 649148020SSam Ravnborg #define __SUN3_MMU_H__ 749148020SSam Ravnborg 849148020SSam Ravnborg #include <linux/types.h> 949148020SSam Ravnborg #include <asm/movs.h> 1049148020SSam Ravnborg #include <asm/sun3-head.h> 1149148020SSam Ravnborg 1249148020SSam Ravnborg /* MMU characteristics. */ 1349148020SSam Ravnborg #define SUN3_SEGMAPS_PER_CONTEXT 2048 1449148020SSam Ravnborg #define SUN3_PMEGS_NUM 256 1549148020SSam Ravnborg #define SUN3_CONTEXTS_NUM 8 1649148020SSam Ravnborg 1749148020SSam Ravnborg #define SUN3_PMEG_SIZE_BITS 17 1849148020SSam Ravnborg #define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS) 1949148020SSam Ravnborg #define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1) 2049148020SSam Ravnborg 2149148020SSam Ravnborg #define SUN3_PTE_SIZE_BITS 13 2249148020SSam Ravnborg #define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS) 2349148020SSam Ravnborg #define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1) 2449148020SSam Ravnborg 2549148020SSam Ravnborg #define SUN3_CONTROL_MASK (0x0FFFFFFC) 2649148020SSam Ravnborg #define SUN3_INVALID_PMEG 255 2749148020SSam Ravnborg #define SUN3_INVALID_CONTEXT 255 2849148020SSam Ravnborg 2949148020SSam Ravnborg #define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */ 3049148020SSam Ravnborg #define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */ 3149148020SSam Ravnborg #define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */ 3249148020SSam Ravnborg #define AC_CONTEXT 0x30000000 /* 34c current mmu-context */ 3349148020SSam Ravnborg #define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/ 3449148020SSam Ravnborg #define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */ 3549148020SSam Ravnborg #define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */ 3649148020SSam Ravnborg #define AC_SYNC_ERR 0x60000000 /* c fault type */ 3749148020SSam Ravnborg #define AC_SYNC_VA 0x60000004 /* c fault virtual address */ 3849148020SSam Ravnborg #define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */ 3949148020SSam Ravnborg #define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */ 4049148020SSam Ravnborg #define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */ 4149148020SSam Ravnborg #define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */ 4249148020SSam Ravnborg #define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */ 4349148020SSam Ravnborg #define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */ 4449148020SSam Ravnborg #define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */ 4549148020SSam Ravnborg #define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/ 4649148020SSam Ravnborg 4749148020SSam Ravnborg #define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \ 4849148020SSam Ravnborg | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED) 4949148020SSam Ravnborg 5049148020SSam Ravnborg /* Bus access type within PTE. */ 5149148020SSam Ravnborg #define SUN3_PAGE_TYPE_MASK (0x0c000000) 5249148020SSam Ravnborg #define SUN3_PAGE_TYPE_MEMORY (0x00000000) 5349148020SSam Ravnborg #define SUN3_PAGE_TYPE_IO (0x04000000) 5449148020SSam Ravnborg #define SUN3_PAGE_TYPE_VME16 (0x08000000) 5549148020SSam Ravnborg #define SUN3_PAGE_TYPE_VME32 (0x0c000000) 5649148020SSam Ravnborg 5749148020SSam Ravnborg /* Mask for page number within PTE. */ 5849148020SSam Ravnborg #define SUN3_PAGE_PGNUM_MASK (0x0007FFFF) 5949148020SSam Ravnborg 6049148020SSam Ravnborg /* Bits within bus-error register. */ 6149148020SSam Ravnborg #define SUN3_BUSERR_WATCHDOG (0x01) 6249148020SSam Ravnborg #define SUN3_BUSERR_unused (0x02) 6349148020SSam Ravnborg #define SUN3_BUSERR_FPAENERR (0x04) 6449148020SSam Ravnborg #define SUN3_BUSERR_FPABERR (0x08) 6549148020SSam Ravnborg #define SUN3_BUSERR_VMEBERR (0x10) 6649148020SSam Ravnborg #define SUN3_BUSERR_TIMEOUT (0x20) 6749148020SSam Ravnborg #define SUN3_BUSERR_PROTERR (0x40) 6849148020SSam Ravnborg #define SUN3_BUSERR_INVALID (0x80) 6949148020SSam Ravnborg 7049148020SSam Ravnborg #ifndef __ASSEMBLY__ 7149148020SSam Ravnborg 7249148020SSam Ravnborg /* Read bus error status register (implicitly clearing it). */ 7349148020SSam Ravnborg static inline unsigned char sun3_get_buserr(void) 7449148020SSam Ravnborg { 7549148020SSam Ravnborg unsigned char sfc, c; 7649148020SSam Ravnborg 7749148020SSam Ravnborg GET_SFC (sfc); 7849148020SSam Ravnborg SET_SFC (FC_CONTROL); 7949148020SSam Ravnborg GET_CONTROL_BYTE (AC_BUS_ERROR, c); 8049148020SSam Ravnborg SET_SFC (sfc); 8149148020SSam Ravnborg 8249148020SSam Ravnborg return c; 8349148020SSam Ravnborg } 8449148020SSam Ravnborg 8549148020SSam Ravnborg /* Read segmap from hardware MMU. */ 8649148020SSam Ravnborg static inline unsigned long sun3_get_segmap(unsigned long addr) 8749148020SSam Ravnborg { 8849148020SSam Ravnborg register unsigned long entry; 8949148020SSam Ravnborg unsigned char c, sfc; 9049148020SSam Ravnborg 9149148020SSam Ravnborg GET_SFC (sfc); 9249148020SSam Ravnborg SET_SFC (FC_CONTROL); 9349148020SSam Ravnborg GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c); 9449148020SSam Ravnborg SET_SFC (sfc); 9549148020SSam Ravnborg entry = c; 9649148020SSam Ravnborg 9749148020SSam Ravnborg return entry; 9849148020SSam Ravnborg } 9949148020SSam Ravnborg 10049148020SSam Ravnborg /* Write segmap to hardware MMU. */ 10149148020SSam Ravnborg static inline void sun3_put_segmap(unsigned long addr, unsigned long entry) 10249148020SSam Ravnborg { 10349148020SSam Ravnborg unsigned char sfc; 10449148020SSam Ravnborg 10549148020SSam Ravnborg GET_DFC (sfc); 10649148020SSam Ravnborg SET_DFC (FC_CONTROL); 10749148020SSam Ravnborg SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry); 10849148020SSam Ravnborg SET_DFC (sfc); 10949148020SSam Ravnborg 11049148020SSam Ravnborg return; 11149148020SSam Ravnborg } 11249148020SSam Ravnborg 11349148020SSam Ravnborg /* Read PTE from hardware MMU. */ 11449148020SSam Ravnborg static inline unsigned long sun3_get_pte(unsigned long addr) 11549148020SSam Ravnborg { 11649148020SSam Ravnborg register unsigned long entry; 11749148020SSam Ravnborg unsigned char sfc; 11849148020SSam Ravnborg 11949148020SSam Ravnborg GET_SFC (sfc); 12049148020SSam Ravnborg SET_SFC (FC_CONTROL); 12149148020SSam Ravnborg GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry); 12249148020SSam Ravnborg SET_SFC (sfc); 12349148020SSam Ravnborg 12449148020SSam Ravnborg return entry; 12549148020SSam Ravnborg } 12649148020SSam Ravnborg 12749148020SSam Ravnborg /* Write PTE to hardware MMU. */ 12849148020SSam Ravnborg static inline void sun3_put_pte(unsigned long addr, unsigned long entry) 12949148020SSam Ravnborg { 13049148020SSam Ravnborg unsigned char sfc; 13149148020SSam Ravnborg 13249148020SSam Ravnborg GET_DFC (sfc); 13349148020SSam Ravnborg SET_DFC (FC_CONTROL); 13449148020SSam Ravnborg SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry); 13549148020SSam Ravnborg SET_DFC (sfc); 13649148020SSam Ravnborg 13749148020SSam Ravnborg return; 13849148020SSam Ravnborg } 13949148020SSam Ravnborg 14049148020SSam Ravnborg /* get current context */ 14149148020SSam Ravnborg static inline unsigned char sun3_get_context(void) 14249148020SSam Ravnborg { 14349148020SSam Ravnborg unsigned char sfc, c; 14449148020SSam Ravnborg 14549148020SSam Ravnborg GET_SFC(sfc); 14649148020SSam Ravnborg SET_SFC(FC_CONTROL); 14749148020SSam Ravnborg GET_CONTROL_BYTE(AC_CONTEXT, c); 14849148020SSam Ravnborg SET_SFC(sfc); 14949148020SSam Ravnborg 15049148020SSam Ravnborg return c; 15149148020SSam Ravnborg } 15249148020SSam Ravnborg 15349148020SSam Ravnborg /* set alternate context */ 15449148020SSam Ravnborg static inline void sun3_put_context(unsigned char c) 15549148020SSam Ravnborg { 15649148020SSam Ravnborg unsigned char dfc; 15749148020SSam Ravnborg GET_DFC(dfc); 15849148020SSam Ravnborg SET_DFC(FC_CONTROL); 15949148020SSam Ravnborg SET_CONTROL_BYTE(AC_CONTEXT, c); 16049148020SSam Ravnborg SET_DFC(dfc); 16149148020SSam Ravnborg 16249148020SSam Ravnborg return; 16349148020SSam Ravnborg } 16449148020SSam Ravnborg 16549148020SSam Ravnborg extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size, 16649148020SSam Ravnborg unsigned long type); 16749148020SSam Ravnborg 16849148020SSam Ravnborg extern int sun3_map_test(unsigned long addr, char *val); 16949148020SSam Ravnborg 17049148020SSam Ravnborg #endif /* !__ASSEMBLY__ */ 17149148020SSam Ravnborg 17249148020SSam Ravnborg #endif /* !__SUN3_MMU_H__ */ 173