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/* SPDX-License-Identifier: GPL-2.0 */ /* swift.h: Specific definitions for the _broken_ Swift SRMMU * MMU module. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #ifndef _SPARC_SWIFT_H #define _SPARC_SWIFT_H /* Swift is so brain damaged, here is the mmu control register. */ #define SWIFT_ST 0x00800000 /* SW tablewalk enable */ #define SWIFT_WP 0x00400000 /* Watchpoint enable */ /* Branch folding (buggy, disable on production systems!) */ #define SWIFT_BF 0x00200000 #define SWIFT_PMC 0x00180000 /* Page mode control */ #define SWIFT_PE 0x00040000 /* Parity enable */ #define SWIFT_PC 0x00020000 /* Parity control */ #define SWIFT_AP 0x00010000 /* Graphics page mode control (TCX/SX) */ #define SWIFT_AC 0x00008000 /* Alternate Cacheability (see viking.h) */ #define SWIFT_BM 0x00004000 /* Boot mode */ #define SWIFT_RC 0x00003c00 /* DRAM refresh control */ #define SWIFT_IE 0x00000200 /* Instruction cache enable */ #define SWIFT_DE 0x00000100 /* Data cache enable */ #define SWIFT_SA 0x00000080 /* Store Allocate */ #define SWIFT_NF 0x00000002 /* No fault mode */ #define SWIFT_EN 0x00000001 /* MMU enable */ /* Bits [13:5] select one of 512 instruction cache tags */ static inline void swift_inv_insn_tag(unsigned long addr) { __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : /* no outputs */ : "r" (addr), "i" (ASI_M_TXTC_TAG) : "memory"); } /* Bits [12:4] select one of 512 data cache tags */ static inline void swift_inv_data_tag(unsigned long addr) { __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : /* no outputs */ : "r" (addr), "i" (ASI_M_DATAC_TAG) : "memory"); } static inline void swift_flush_dcache(void) { unsigned long addr; for (addr = 0; addr < 0x2000; addr += 0x10) swift_inv_data_tag(addr); } static inline void swift_flush_icache(void) { unsigned long addr; for (addr = 0; addr < 0x4000; addr += 0x20) swift_inv_insn_tag(addr); } static inline void swift_idflash_clear(void) { unsigned long addr; for (addr = 0; addr < 0x2000; addr += 0x10) { swift_inv_insn_tag(addr<<1); swift_inv_data_tag(addr); } } /* Swift is so broken, it isn't even safe to use the following. */ static inline void swift_flush_page(unsigned long page) { __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : /* no outputs */ : "r" (page), "i" (ASI_M_FLUSH_PAGE) : "memory"); } static inline void swift_flush_segment(unsigned long addr) { __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : /* no outputs */ : "r" (addr), "i" (ASI_M_FLUSH_SEG) : "memory"); } static inline void swift_flush_region(unsigned long addr) { __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : /* no outputs */ : "r" (addr), "i" (ASI_M_FLUSH_REGION) : "memory"); } static inline void swift_flush_context(void) { __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t" : /* no outputs */ : "i" (ASI_M_FLUSH_CTX) : "memory"); } #endif /* !(_SPARC_SWIFT_H) */
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