1 /*
2 * ross.h: Ross module specific definitions and defines.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7 #ifndef _SPARC_ROSS_H
8 #define _SPARC_ROSS_H
9
10 #include <asm/asi.h>
11 #include <asm/page.h>
12
13 /* Ross made Hypersparcs have a %psr 'impl' field of '0001'. The 'vers'
14 * field has '1111'.
15 */
16
17 /* The MMU control register fields on the HyperSparc.
18 *
19 * -----------------------------------------------------------------
20 * |implvers| RSV |CWR|SE|WBE| MID |BM| C|CS|MR|CM|RSV|CE|RSV|NF|ME|
21 * -----------------------------------------------------------------
22 * 31 24 23-22 21 20 19 18-15 14 13 12 11 10 9 8 7-2 1 0
23 *
24 * Phew, lots of fields there ;-)
25 *
26 * CWR: Cache Wrapping Enabled, if one cache wrapping is on.
27 * SE: Snoop Enable, turns on bus snooping for cache activity if one.
28 * WBE: Write Buffer Enable, one turns it on.
29 * MID: The ModuleID of the chip for MBus transactions.
30 * BM: Boot-Mode. One indicates the MMU is in boot mode.
31 * C: Indicates whether accesses are cachable while the MMU is
32 * disabled.
33 * CS: Cache Size -- 0 = 128k, 1 = 256k
34 * MR: Memory Reflection, one indicates that the memory bus connected
35 * to the MBus supports memory reflection.
36 * CM: Cache Mode -- 0 = write-through, 1 = copy-back
37 * CE: Cache Enable -- 0 = no caching, 1 = cache is on
38 * NF: No Fault -- 0 = faults trap the CPU from supervisor mode
39 * 1 = faults from supervisor mode do not generate traps
40 * ME: MMU Enable -- 0 = MMU is off, 1 = MMU is on
41 */
42
43 #define HYPERSPARC_CWENABLE 0x00200000
44 #define HYPERSPARC_SBENABLE 0x00100000
45 #define HYPERSPARC_WBENABLE 0x00080000
46 #define HYPERSPARC_MIDMASK 0x00078000
47 #define HYPERSPARC_BMODE 0x00004000
48 #define HYPERSPARC_ACENABLE 0x00002000
49 #define HYPERSPARC_CSIZE 0x00001000
50 #define HYPERSPARC_MRFLCT 0x00000800
51 #define HYPERSPARC_CMODE 0x00000400
52 #define HYPERSPARC_CENABLE 0x00000100
53 #define HYPERSPARC_NFAULT 0x00000002
54 #define HYPERSPARC_MENABLE 0x00000001
55
56
57 /* The ICCR instruction cache register on the HyperSparc.
58 *
59 * -----------------------------------------------
60 * | | FTD | ICE |
61 * -----------------------------------------------
62 * 31 1 0
63 *
64 * This register is accessed using the V8 'wrasr' and 'rdasr'
65 * opcodes, since not all assemblers understand them and those
66 * that do use different semantics I will just hard code the
67 * instruction with a '.word' statement.
68 *
69 * FTD: If set to one flush instructions executed during an
70 * instruction cache hit occurs, the corresponding line
71 * for said cache-hit is invalidated. If FTD is zero,
72 * an unimplemented 'flush' trap will occur when any
73 * flush is executed by the processor.
74 *
75 * ICE: If set to one, the instruction cache is enabled. If
76 * zero, the cache will not be used for instruction fetches.
77 *
78 * All other bits are read as zeros, and writes to them have no
79 * effect.
80 *
81 * Wheee, not many assemblers understand the %iccr register nor
82 * the generic asr r/w instructions.
83 *
84 * 1000 0011 0100 0111 1100 0000 0000 0000 ! rd %iccr, %g1
85 *
86 * 0x 8 3 4 7 c 0 0 0 ! 0x8347c000
87 *
88 * 1011 1111 1000 0000 0110 0000 0000 0000 ! wr %g1, 0x0, %iccr
89 *
90 * 0x b f 8 0 6 0 0 0 ! 0xbf806000
91 *
92 */
93
94 #define HYPERSPARC_ICCR_FTD 0x00000002
95 #define HYPERSPARC_ICCR_ICE 0x00000001
96
97 #ifndef __ASSEMBLY__
98
get_ross_icr(void)99 static inline unsigned int get_ross_icr(void)
100 {
101 unsigned int icreg;
102
103 __asm__ __volatile__(".word 0x8347c000\n\t" /* rd %iccr, %g1 */
104 "mov %%g1, %0\n\t"
105 : "=r" (icreg)
106 : /* no inputs */
107 : "g1", "memory");
108
109 return icreg;
110 }
111
put_ross_icr(unsigned int icreg)112 static inline void put_ross_icr(unsigned int icreg)
113 {
114 __asm__ __volatile__("or %%g0, %0, %%g1\n\t"
115 ".word 0xbf806000\n\t" /* wr %g1, 0x0, %iccr */
116 "nop\n\t"
117 "nop\n\t"
118 "nop\n\t"
119 : /* no outputs */
120 : "r" (icreg)
121 : "g1", "memory");
122
123 return;
124 }
125
126 /* HyperSparc specific cache flushing. */
127
128 /* This is for the on-chip instruction cache. */
hyper_flush_whole_icache(void)129 static inline void hyper_flush_whole_icache(void)
130 {
131 __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
132 : /* no outputs */
133 : "i" (ASI_M_FLUSH_IWHOLE)
134 : "memory");
135 return;
136 }
137
138 extern int vac_cache_size;
139 extern int vac_line_size;
140
hyper_clear_all_tags(void)141 static inline void hyper_clear_all_tags(void)
142 {
143 unsigned long addr;
144
145 for(addr = 0; addr < vac_cache_size; addr += vac_line_size)
146 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
147 : /* no outputs */
148 : "r" (addr), "i" (ASI_M_DATAC_TAG)
149 : "memory");
150 }
151
hyper_flush_unconditional_combined(void)152 static inline void hyper_flush_unconditional_combined(void)
153 {
154 unsigned long addr;
155
156 for (addr = 0; addr < vac_cache_size; addr += vac_line_size)
157 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
158 : /* no outputs */
159 : "r" (addr), "i" (ASI_M_FLUSH_CTX)
160 : "memory");
161 }
162
hyper_flush_cache_user(void)163 static inline void hyper_flush_cache_user(void)
164 {
165 unsigned long addr;
166
167 for (addr = 0; addr < vac_cache_size; addr += vac_line_size)
168 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
169 : /* no outputs */
170 : "r" (addr), "i" (ASI_M_FLUSH_USER)
171 : "memory");
172 }
173
hyper_flush_cache_page(unsigned long page)174 static inline void hyper_flush_cache_page(unsigned long page)
175 {
176 unsigned long end;
177
178 page &= PAGE_MASK;
179 end = page + PAGE_SIZE;
180 while (page < end) {
181 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
182 : /* no outputs */
183 : "r" (page), "i" (ASI_M_FLUSH_PAGE)
184 : "memory");
185 page += vac_line_size;
186 }
187 }
188
189 #endif /* !(__ASSEMBLY__) */
190
191 #endif /* !(_SPARC_ROSS_H) */
192