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1da177e4 LT |
1 | /* cpudata.h: Per-cpu parameters. |
2 | * | |
56fb4df6 | 3 | * Copyright (C) 2003, 2005, 2006 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | */ |
5 | ||
6 | #ifndef _SPARC64_CPUDATA_H | |
7 | #define _SPARC64_CPUDATA_H | |
8 | ||
d257d5da | 9 | #include <asm/hypervisor.h> |
89a5264f | 10 | #include <asm/asi.h> |
d257d5da | 11 | |
56fb4df6 DM |
12 | #ifndef __ASSEMBLY__ |
13 | ||
1da177e4 | 14 | #include <linux/percpu.h> |
56fb4df6 | 15 | #include <linux/threads.h> |
1da177e4 LT |
16 | |
17 | typedef struct { | |
18 | /* Dcache line 1 */ | |
d7ce78fd | 19 | unsigned int __softirq_pending; /* must be 1st, see rtrap.S */ |
1da177e4 LT |
20 | unsigned int multiplier; |
21 | unsigned int counter; | |
1bd0cd74 | 22 | unsigned int __pad1; |
1da177e4 LT |
23 | unsigned long clock_tick; /* %tick's per second */ |
24 | unsigned long udelay_val; | |
25 | ||
3c936465 | 26 | /* Dcache line 2, rarely used */ |
80dc0d6b DM |
27 | unsigned int dcache_size; |
28 | unsigned int dcache_line_size; | |
29 | unsigned int icache_size; | |
30 | unsigned int icache_line_size; | |
31 | unsigned int ecache_size; | |
32 | unsigned int ecache_line_size; | |
80dc0d6b | 33 | unsigned int __pad3; |
05e28f9d | 34 | unsigned int __pad4; |
1da177e4 LT |
35 | } cpuinfo_sparc; |
36 | ||
37 | DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data); | |
38 | #define cpu_data(__cpu) per_cpu(__cpu_data, (__cpu)) | |
39 | #define local_cpu_data() __get_cpu_var(__cpu_data) | |
40 | ||
56fb4df6 DM |
41 | /* Trap handling code needs to get at a few critical values upon |
42 | * trap entry and to process TSB misses. These cannot be in the | |
43 | * per_cpu() area as we really need to lock them into the TLB and | |
44 | * thus make them part of the main kernel image. As a result we | |
45 | * try to make this as small as possible. | |
46 | * | |
47 | * This is padded out and aligned to 64-bytes to avoid false sharing | |
48 | * on SMP. | |
49 | */ | |
50 | ||
51 | /* If you modify the size of this structure, please update | |
52 | * TRAP_BLOCK_SZ_SHIFT below. | |
53 | */ | |
54 | struct thread_info; | |
55 | struct trap_per_cpu { | |
5b0c0572 | 56 | /* D-cache line 1: Basic thread information, cpu and device mondo queues */ |
56fb4df6 DM |
57 | struct thread_info *thread; |
58 | unsigned long pgd_paddr; | |
7202c55c DM |
59 | unsigned long cpu_mondo_pa; |
60 | unsigned long dev_mondo_pa; | |
5b0c0572 DM |
61 | |
62 | /* D-cache line 2: Error Mondo Queue and kernel buffer pointers */ | |
7202c55c | 63 | unsigned long resum_mondo_pa; |
5b0c0572 | 64 | unsigned long resum_kernel_buf_pa; |
7202c55c | 65 | unsigned long nonresum_mondo_pa; |
5b0c0572 | 66 | unsigned long nonresum_kernel_buf_pa; |
d257d5da | 67 | |
1d2f1f90 | 68 | /* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */ |
d257d5da | 69 | struct hv_fault_status fault_info; |
1d2f1f90 DM |
70 | |
71 | /* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */ | |
72 | unsigned long cpu_mondo_block_pa; | |
73 | unsigned long cpu_list_pa; | |
dcc1e8dd DM |
74 | unsigned long tsb_huge; |
75 | unsigned long tsb_huge_temp; | |
1d2f1f90 DM |
76 | |
77 | /* Dcache line 8: Unused, needed to keep trap_block a power-of-2 in size. */ | |
78 | unsigned long __pad2[4]; | |
56fb4df6 DM |
79 | } __attribute__((aligned(64))); |
80 | extern struct trap_per_cpu trap_block[NR_CPUS]; | |
72aff53f | 81 | extern void init_cur_cpu_trap(struct thread_info *); |
a8b900d8 | 82 | extern void setup_tba(void); |
56fb4df6 | 83 | |
92704a1c DM |
84 | struct cpuid_patch_entry { |
85 | unsigned int addr; | |
86 | unsigned int cheetah_safari[4]; | |
87 | unsigned int cheetah_jbus[4]; | |
88 | unsigned int starfire[4]; | |
d96b8153 | 89 | unsigned int sun4v[4]; |
92704a1c DM |
90 | }; |
91 | extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end; | |
92704a1c | 92 | |
df7d6aec | 93 | struct sun4v_1insn_patch_entry { |
936f482a DM |
94 | unsigned int addr; |
95 | unsigned int insn; | |
96 | }; | |
df7d6aec DM |
97 | extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch, |
98 | __sun4v_1insn_patch_end; | |
45fec05f | 99 | |
df7d6aec | 100 | struct sun4v_2insn_patch_entry { |
45fec05f DM |
101 | unsigned int addr; |
102 | unsigned int insns[2]; | |
103 | }; | |
df7d6aec DM |
104 | extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch, |
105 | __sun4v_2insn_patch_end; | |
106 | ||
56fb4df6 DM |
107 | #endif /* !(__ASSEMBLY__) */ |
108 | ||
7202c55c DM |
109 | #define TRAP_PER_CPU_THREAD 0x00 |
110 | #define TRAP_PER_CPU_PGD_PADDR 0x08 | |
5b0c0572 DM |
111 | #define TRAP_PER_CPU_CPU_MONDO_PA 0x10 |
112 | #define TRAP_PER_CPU_DEV_MONDO_PA 0x18 | |
113 | #define TRAP_PER_CPU_RESUM_MONDO_PA 0x20 | |
114 | #define TRAP_PER_CPU_RESUM_KBUF_PA 0x28 | |
115 | #define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30 | |
116 | #define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38 | |
7202c55c | 117 | #define TRAP_PER_CPU_FAULT_INFO 0x40 |
1d2f1f90 DM |
118 | #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0 |
119 | #define TRAP_PER_CPU_CPU_LIST_PA 0xc8 | |
dcc1e8dd DM |
120 | #define TRAP_PER_CPU_TSB_HUGE 0xd0 |
121 | #define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8 | |
56fb4df6 | 122 | |
1d2f1f90 | 123 | #define TRAP_BLOCK_SZ_SHIFT 8 |
56fb4df6 | 124 | |
d96b8153 DM |
125 | #include <asm/scratchpad.h> |
126 | ||
92704a1c DM |
127 | #define __GET_CPUID(REG) \ |
128 | /* Spitfire implementation (default). */ \ | |
129 | 661: ldxa [%g0] ASI_UPA_CONFIG, REG; \ | |
130 | srlx REG, 17, REG; \ | |
131 | and REG, 0x1f, REG; \ | |
132 | nop; \ | |
133 | .section .cpuid_patch, "ax"; \ | |
134 | /* Instruction location. */ \ | |
135 | .word 661b; \ | |
136 | /* Cheetah Safari implementation. */ \ | |
137 | ldxa [%g0] ASI_SAFARI_CONFIG, REG; \ | |
138 | srlx REG, 17, REG; \ | |
139 | and REG, 0x3ff, REG; \ | |
140 | nop; \ | |
141 | /* Cheetah JBUS implementation. */ \ | |
142 | ldxa [%g0] ASI_JBUS_CONFIG, REG; \ | |
143 | srlx REG, 17, REG; \ | |
144 | and REG, 0x1f, REG; \ | |
145 | nop; \ | |
146 | /* Starfire implementation. */ \ | |
147 | sethi %hi(0x1fff40000d0 >> 9), REG; \ | |
148 | sllx REG, 9, REG; \ | |
149 | or REG, 0xd0, REG; \ | |
150 | lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\ | |
d96b8153 DM |
151 | /* sun4v implementation. */ \ |
152 | mov SCRATCHPAD_CPUID, REG; \ | |
d96b8153 DM |
153 | ldxa [REG] ASI_SCRATCHPAD, REG; \ |
154 | nop; \ | |
89a5264f | 155 | nop; \ |
92704a1c | 156 | .previous; |
56fb4df6 | 157 | |
ebd8c56c DM |
158 | #ifdef CONFIG_SMP |
159 | ||
12eaa328 | 160 | #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ |
ffe483d5 DM |
161 | __GET_CPUID(TMP) \ |
162 | sethi %hi(trap_block), DEST; \ | |
163 | sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \ | |
164 | or DEST, %lo(trap_block), DEST; \ | |
165 | add DEST, TMP, DEST; \ | |
12eaa328 DM |
166 | |
167 | /* Clobbers TMP, current address space PGD phys address into DEST. */ | |
168 | #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ | |
169 | TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ | |
ffe483d5 DM |
170 | ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; |
171 | ||
172 | /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ | |
173 | #define TRAP_LOAD_IRQ_WORK(DEST, TMP) \ | |
174 | __GET_CPUID(TMP) \ | |
175 | sethi %hi(__irq_work), DEST; \ | |
176 | sllx TMP, 6, TMP; \ | |
177 | or DEST, %lo(__irq_work), DEST; \ | |
178 | add DEST, TMP, DEST; | |
179 | ||
180 | /* Clobbers TMP, loads DEST with current thread info pointer. */ | |
181 | #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ | |
12eaa328 DM |
182 | TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ |
183 | ldx [DEST + TRAP_PER_CPU_THREAD], DEST; | |
ffe483d5 DM |
184 | |
185 | /* Given the current thread info pointer in THR, load the per-cpu | |
186 | * area base of the current processor into DEST. REG1, REG2, and REG3 are | |
56fb4df6 | 187 | * clobbered. |
86b81868 | 188 | * |
ffe483d5 | 189 | * You absolutely cannot use DEST as a temporary in this code. The |
86b81868 | 190 | * reason is that traps can happen during execution, and return from |
ffe483d5 | 191 | * trap will load the fully resolved DEST per-cpu base. This can corrupt |
86b81868 | 192 | * the calculations done by the macro mid-stream. |
56fb4df6 | 193 | */ |
ffe483d5 DM |
194 | #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \ |
195 | ldub [THR + TI_CPU], REG1; \ | |
86b81868 | 196 | sethi %hi(__per_cpu_shift), REG3; \ |
56fb4df6 | 197 | sethi %hi(__per_cpu_base), REG2; \ |
86b81868 | 198 | ldx [REG3 + %lo(__per_cpu_shift)], REG3; \ |
56fb4df6 | 199 | ldx [REG2 + %lo(__per_cpu_base)], REG2; \ |
86b81868 | 200 | sllx REG1, REG3, REG3; \ |
ffe483d5 | 201 | add REG3, REG2, DEST; |
92704a1c | 202 | |
56fb4df6 | 203 | #else |
92704a1c | 204 | |
12eaa328 DM |
205 | #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ |
206 | sethi %hi(trap_block), DEST; \ | |
207 | or DEST, %lo(trap_block), DEST; \ | |
5b0c0572 | 208 | |
92704a1c | 209 | /* Uniprocessor versions, we know the cpuid is zero. */ |
ffe483d5 | 210 | #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ |
12eaa328 | 211 | TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ |
ffe483d5 | 212 | ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; |
92704a1c | 213 | |
ffe483d5 DM |
214 | #define TRAP_LOAD_IRQ_WORK(DEST, TMP) \ |
215 | sethi %hi(__irq_work), DEST; \ | |
216 | or DEST, %lo(__irq_work), DEST; | |
92704a1c | 217 | |
ffe483d5 | 218 | #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ |
12eaa328 DM |
219 | TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ |
220 | ldx [DEST + TRAP_PER_CPU_THREAD], DEST; | |
92704a1c | 221 | |
ffe483d5 DM |
222 | /* No per-cpu areas on uniprocessor, so no need to load DEST. */ |
223 | #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) | |
92704a1c DM |
224 | |
225 | #endif /* !(CONFIG_SMP) */ | |
56fb4df6 | 226 | |
1da177e4 | 227 | #endif /* _SPARC64_CPUDATA_H */ |