1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* swift.h: Specific definitions for the _broken_ Swift SRMMU
11 /* Swift is so brain damaged, here is the mmu control register. */
12 #define SWIFT_ST 0x00800000 /* SW tablewalk enable */
13 #define SWIFT_WP 0x00400000 /* Watchpoint enable */
15 /* Branch folding (buggy, disable on production systems!) */
16 #define SWIFT_BF 0x00200000
17 #define SWIFT_PMC 0x00180000 /* Page mode control */
18 #define SWIFT_PE 0x00040000 /* Parity enable */
19 #define SWIFT_PC 0x00020000 /* Parity control */
20 #define SWIFT_AP 0x00010000 /* Graphics page mode control (TCX/SX) */
21 #define SWIFT_AC 0x00008000 /* Alternate Cacheability (see viking.h) */
22 #define SWIFT_BM 0x00004000 /* Boot mode */
23 #define SWIFT_RC 0x00003c00 /* DRAM refresh control */
24 #define SWIFT_IE 0x00000200 /* Instruction cache enable */
25 #define SWIFT_DE 0x00000100 /* Data cache enable */
26 #define SWIFT_SA 0x00000080 /* Store Allocate */
27 #define SWIFT_NF 0x00000002 /* No fault mode */
28 #define SWIFT_EN 0x00000001 /* MMU enable */
30 /* Bits [13:5] select one of 512 instruction cache tags */
31 static inline void swift_inv_insn_tag(unsigned long addr)
33 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
35 : "r" (addr), "i" (ASI_M_TXTC_TAG)
39 /* Bits [12:4] select one of 512 data cache tags */
40 static inline void swift_inv_data_tag(unsigned long addr)
42 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
44 : "r" (addr), "i" (ASI_M_DATAC_TAG)
48 static inline void swift_flush_dcache(void)
52 for (addr = 0; addr < 0x2000; addr += 0x10)
53 swift_inv_data_tag(addr);
56 static inline void swift_flush_icache(void)
60 for (addr = 0; addr < 0x4000; addr += 0x20)
61 swift_inv_insn_tag(addr);
64 static inline void swift_idflash_clear(void)
68 for (addr = 0; addr < 0x2000; addr += 0x10) {
69 swift_inv_insn_tag(addr<<1);
70 swift_inv_data_tag(addr);
74 /* Swift is so broken, it isn't even safe to use the following. */
75 static inline void swift_flush_page(unsigned long page)
77 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
79 : "r" (page), "i" (ASI_M_FLUSH_PAGE)
83 static inline void swift_flush_segment(unsigned long addr)
85 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
87 : "r" (addr), "i" (ASI_M_FLUSH_SEG)
91 static inline void swift_flush_region(unsigned long addr)
93 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
95 : "r" (addr), "i" (ASI_M_FLUSH_REGION)
99 static inline void swift_flush_context(void)
101 __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
103 : "i" (ASI_M_FLUSH_CTX)
107 #endif /* !(_SPARC_SWIFT_H) */