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1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2003, 2004 Ralf Baechle | |
7 | */ | |
8 | #ifndef __ASM_CPU_FEATURES_H | |
9 | #define __ASM_CPU_FEATURES_H | |
10 | ||
11 | #include <linux/config.h> | |
12 | ||
13 | #include <asm/cpu.h> | |
14 | #include <asm/cpu-info.h> | |
15 | #include <cpu-feature-overrides.h> | |
16 | ||
17 | /* | |
18 | * SMP assumption: Options of CPU 0 are a superset of all processors. | |
19 | * This is true for all known MIPS systems. | |
20 | */ | |
21 | #ifndef cpu_has_tlb | |
22 | #define cpu_has_tlb (cpu_data[0].options & MIPS_CPU_TLB) | |
23 | #endif | |
24 | #ifndef cpu_has_4kex | |
25 | #define cpu_has_4kex (cpu_data[0].options & MIPS_CPU_4KEX) | |
26 | #endif | |
27 | #ifndef cpu_has_4ktlb | |
28 | #define cpu_has_4ktlb (cpu_data[0].options & MIPS_CPU_4KTLB) | |
29 | #endif | |
30 | #ifndef cpu_has_fpu | |
31 | #define cpu_has_fpu (cpu_data[0].options & MIPS_CPU_FPU) | |
32 | #endif | |
33 | #ifndef cpu_has_32fpr | |
34 | #define cpu_has_32fpr (cpu_data[0].options & MIPS_CPU_32FPR) | |
35 | #endif | |
36 | #ifndef cpu_has_counter | |
37 | #define cpu_has_counter (cpu_data[0].options & MIPS_CPU_COUNTER) | |
38 | #endif | |
39 | #ifndef cpu_has_watch | |
40 | #define cpu_has_watch (cpu_data[0].options & MIPS_CPU_WATCH) | |
41 | #endif | |
42 | #ifndef cpu_has_mips16 | |
43 | #define cpu_has_mips16 (cpu_data[0].options & MIPS_CPU_MIPS16) | |
44 | #endif | |
45 | #ifndef cpu_has_divec | |
46 | #define cpu_has_divec (cpu_data[0].options & MIPS_CPU_DIVEC) | |
47 | #endif | |
48 | #ifndef cpu_has_vce | |
49 | #define cpu_has_vce (cpu_data[0].options & MIPS_CPU_VCE) | |
50 | #endif | |
51 | #ifndef cpu_has_cache_cdex_p | |
52 | #define cpu_has_cache_cdex_p (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_P) | |
53 | #endif | |
54 | #ifndef cpu_has_cache_cdex_s | |
55 | #define cpu_has_cache_cdex_s (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_S) | |
56 | #endif | |
57 | #ifndef cpu_has_prefetch | |
58 | #define cpu_has_prefetch (cpu_data[0].options & MIPS_CPU_PREFETCH) | |
59 | #endif | |
60 | #ifndef cpu_has_mcheck | |
61 | #define cpu_has_mcheck (cpu_data[0].options & MIPS_CPU_MCHECK) | |
62 | #endif | |
63 | #ifndef cpu_has_ejtag | |
64 | #define cpu_has_ejtag (cpu_data[0].options & MIPS_CPU_EJTAG) | |
65 | #endif | |
66 | #ifndef cpu_has_llsc | |
67 | #define cpu_has_llsc (cpu_data[0].options & MIPS_CPU_LLSC) | |
68 | #endif | |
69 | #ifndef cpu_has_vtag_icache | |
70 | #define cpu_has_vtag_icache (cpu_data[0].icache.flags & MIPS_CACHE_VTAG) | |
71 | #endif | |
72 | #ifndef cpu_has_dc_aliases | |
73 | #define cpu_has_dc_aliases (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES) | |
74 | #endif | |
75 | #ifndef cpu_has_ic_fills_f_dc | |
76 | #define cpu_has_ic_fills_f_dc (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC) | |
77 | #endif | |
78 | ||
79 | /* | |
80 | * I-Cache snoops remote store. This only matters on SMP. Some multiprocessors | |
81 | * such as the R10000 have I-Caches that snoop local stores; the embedded ones | |
82 | * don't. For maintaining I-cache coherency this means we need to flush the | |
83 | * D-cache all the way back to whever the I-cache does refills from, so the | |
84 | * I-cache has a chance to see the new data at all. Then we have to flush the | |
85 | * I-cache also. | |
86 | * Note we may have been rescheduled and may no longer be running on the CPU | |
87 | * that did the store so we can't optimize this into only doing the flush on | |
88 | * the local CPU. | |
89 | */ | |
90 | #ifndef cpu_icache_snoops_remote_store | |
91 | #ifdef CONFIG_SMP | |
92 | #define cpu_icache_snoops_remote_store (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE) | |
93 | #else | |
94 | #define cpu_icache_snoops_remote_store 1 | |
95 | #endif | |
96 | #endif | |
97 | ||
98 | /* | |
99 | * Certain CPUs may throw bizarre exceptions if not the whole cacheline | |
100 | * contains valid instructions. For these we ensure proper alignment of | |
101 | * signal trampolines and pad them to the size of a full cache lines with | |
102 | * nops. This is also used in structure definitions so can't be a test macro | |
103 | * like the others. | |
104 | */ | |
105 | #ifndef PLAT_TRAMPOLINE_STUFF_LINE | |
106 | #define PLAT_TRAMPOLINE_STUFF_LINE 0UL | |
107 | #endif | |
108 | ||
875d43e7 | 109 | #ifdef CONFIG_32BIT |
1da177e4 LT |
110 | # ifndef cpu_has_nofpuex |
111 | # define cpu_has_nofpuex (cpu_data[0].options & MIPS_CPU_NOFPUEX) | |
112 | # endif | |
113 | # ifndef cpu_has_64bits | |
114 | # define cpu_has_64bits (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT) | |
115 | # endif | |
116 | # ifndef cpu_has_64bit_zero_reg | |
117 | # define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT) | |
118 | # endif | |
119 | # ifndef cpu_has_64bit_gp_regs | |
120 | # define cpu_has_64bit_gp_regs 0 | |
121 | # endif | |
122 | # ifndef cpu_has_64bit_addresses | |
123 | # define cpu_has_64bit_addresses 0 | |
124 | # endif | |
125 | #endif | |
126 | ||
875d43e7 | 127 | #ifdef CONFIG_64BIT |
1da177e4 LT |
128 | # ifndef cpu_has_nofpuex |
129 | # define cpu_has_nofpuex 0 | |
130 | # endif | |
131 | # ifndef cpu_has_64bits | |
132 | # define cpu_has_64bits 1 | |
133 | # endif | |
134 | # ifndef cpu_has_64bit_zero_reg | |
135 | # define cpu_has_64bit_zero_reg 1 | |
136 | # endif | |
137 | # ifndef cpu_has_64bit_gp_regs | |
138 | # define cpu_has_64bit_gp_regs 1 | |
139 | # endif | |
140 | # ifndef cpu_has_64bit_addresses | |
141 | # define cpu_has_64bit_addresses 1 | |
142 | # endif | |
143 | #endif | |
144 | ||
145 | #ifndef cpu_has_subset_pcaches | |
146 | #define cpu_has_subset_pcaches (cpu_data[0].options & MIPS_CPU_SUBSET_CACHES) | |
147 | #endif | |
148 | ||
149 | #ifndef cpu_dcache_line_size | |
150 | #define cpu_dcache_line_size() current_cpu_data.dcache.linesz | |
151 | #endif | |
152 | #ifndef cpu_icache_line_size | |
153 | #define cpu_icache_line_size() current_cpu_data.icache.linesz | |
154 | #endif | |
155 | #ifndef cpu_scache_line_size | |
156 | #define cpu_scache_line_size() current_cpu_data.scache.linesz | |
157 | #endif | |
158 | ||
159 | #endif /* __ASM_CPU_FEATURES_H */ |