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usr
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src
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linux-headers-6.8.0-83
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arch
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m68k
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include
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asm
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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__ */
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