1 /* swift.h: Specific definitions for the _broken_ Swift SRMMU
2 * MMU module.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7 #ifndef _SPARC_SWIFT_H
8 #define _SPARC_SWIFT_H
9
10 /* Swift is so brain damaged, here is the mmu control register. */
11 #define SWIFT_ST 0x00800000 /* SW tablewalk enable */
12 #define SWIFT_WP 0x00400000 /* Watchpoint enable */
13
14 /* Branch folding (buggy, disable on production systems!) */
15 #define SWIFT_BF 0x00200000
16 #define SWIFT_PMC 0x00180000 /* Page mode control */
17 #define SWIFT_PE 0x00040000 /* Parity enable */
18 #define SWIFT_PC 0x00020000 /* Parity control */
19 #define SWIFT_AP 0x00010000 /* Graphics page mode control (TCX/SX) */
20 #define SWIFT_AC 0x00008000 /* Alternate Cacheability (see viking.h) */
21 #define SWIFT_BM 0x00004000 /* Boot mode */
22 #define SWIFT_RC 0x00003c00 /* DRAM refresh control */
23 #define SWIFT_IE 0x00000200 /* Instruction cache enable */
24 #define SWIFT_DE 0x00000100 /* Data cache enable */
25 #define SWIFT_SA 0x00000080 /* Store Allocate */
26 #define SWIFT_NF 0x00000002 /* No fault mode */
27 #define SWIFT_EN 0x00000001 /* MMU enable */
28
29 /* Bits [13:5] select one of 512 instruction cache tags */
swift_inv_insn_tag(unsigned long addr)30 static inline void swift_inv_insn_tag(unsigned long addr)
31 {
32 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
33 : /* no outputs */
34 : "r" (addr), "i" (ASI_M_TXTC_TAG)
35 : "memory");
36 }
37
38 /* Bits [12:4] select one of 512 data cache tags */
swift_inv_data_tag(unsigned long addr)39 static inline void swift_inv_data_tag(unsigned long addr)
40 {
41 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
42 : /* no outputs */
43 : "r" (addr), "i" (ASI_M_DATAC_TAG)
44 : "memory");
45 }
46
swift_flush_dcache(void)47 static inline void swift_flush_dcache(void)
48 {
49 unsigned long addr;
50
51 for (addr = 0; addr < 0x2000; addr += 0x10)
52 swift_inv_data_tag(addr);
53 }
54
swift_flush_icache(void)55 static inline void swift_flush_icache(void)
56 {
57 unsigned long addr;
58
59 for (addr = 0; addr < 0x4000; addr += 0x20)
60 swift_inv_insn_tag(addr);
61 }
62
swift_idflash_clear(void)63 static inline void swift_idflash_clear(void)
64 {
65 unsigned long addr;
66
67 for (addr = 0; addr < 0x2000; addr += 0x10) {
68 swift_inv_insn_tag(addr<<1);
69 swift_inv_data_tag(addr);
70 }
71 }
72
73 /* Swift is so broken, it isn't even safe to use the following. */
swift_flush_page(unsigned long page)74 static inline void swift_flush_page(unsigned long page)
75 {
76 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
77 : /* no outputs */
78 : "r" (page), "i" (ASI_M_FLUSH_PAGE)
79 : "memory");
80 }
81
swift_flush_segment(unsigned long addr)82 static inline void swift_flush_segment(unsigned long addr)
83 {
84 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
85 : /* no outputs */
86 : "r" (addr), "i" (ASI_M_FLUSH_SEG)
87 : "memory");
88 }
89
swift_flush_region(unsigned long addr)90 static inline void swift_flush_region(unsigned long addr)
91 {
92 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
93 : /* no outputs */
94 : "r" (addr), "i" (ASI_M_FLUSH_REGION)
95 : "memory");
96 }
97
swift_flush_context(void)98 static inline void swift_flush_context(void)
99 {
100 __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
101 : /* no outputs */
102 : "i" (ASI_M_FLUSH_CTX)
103 : "memory");
104 }
105
106 #endif /* !(_SPARC_SWIFT_H) */
107