1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
#ifndef _SPARC_TRAP_BLOCK_H
#define _SPARC_TRAP_BLOCK_H
#include <asm/hypervisor.h>
#include <asm/asi.h>
#ifndef __ASSEMBLY__
/* Trap handling code needs to get at a few critical values upon
* trap entry and to process TSB misses. These cannot be in the
* per_cpu() area as we really need to lock them into the TLB and
* thus make them part of the main kernel image. As a result we
* try to make this as small as possible.
*
* This is padded out and aligned to 64-bytes to avoid false sharing
* on SMP.
*/
/* If you modify the size of this structure, please update
* TRAP_BLOCK_SZ_SHIFT below.
*/
struct thread_info;
struct trap_per_cpu {
/* D-cache line 1: Basic thread information, cpu and device mondo queues */
struct thread_info *thread;
unsigned long pgd_paddr;
unsigned long cpu_mondo_pa;
unsigned long dev_mondo_pa;
/* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
unsigned long resum_mondo_pa;
unsigned long resum_kernel_buf_pa;
unsigned long nonresum_mondo_pa;
unsigned long nonresum_kernel_buf_pa;
/* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */
struct hv_fault_status fault_info;
/* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */
unsigned long cpu_mondo_block_pa;
unsigned long cpu_list_pa;
unsigned long tsb_huge;
unsigned long tsb_huge_temp;
/* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size. */
unsigned long irq_worklist_pa;
unsigned int cpu_mondo_qmask;
unsigned int dev_mondo_qmask;
unsigned int resum_qmask;
unsigned int nonresum_qmask;
unsigned long __per_cpu_base;
} __attribute__((aligned(64)));
extern struct trap_per_cpu trap_block[NR_CPUS];
extern void init_cur_cpu_trap(struct thread_info *);
extern void setup_tba(void);
extern int ncpus_probed;
extern unsigned long real_hard_smp_processor_id(void);
struct cpuid_patch_entry {
unsigned int addr;
unsigned int cheetah_safari[4];
unsigned int cheetah_jbus[4];
unsigned int starfire[4];
unsigned int sun4v[4];
};
extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
struct sun4v_1insn_patch_entry {
unsigned int addr;
unsigned int insn;
};
extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch,
__sun4v_1insn_patch_end;
struct sun4v_2insn_patch_entry {
unsigned int addr;
unsigned int insns[2];
};
extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
__sun4v_2insn_patch_end;
#endif /* !(__ASSEMBLY__) */
#define TRAP_PER_CPU_THREAD 0x00
#define TRAP_PER_CPU_PGD_PADDR 0x08
#define TRAP_PER_CPU_CPU_MONDO_PA 0x10
#define TRAP_PER_CPU_DEV_MONDO_PA 0x18
#define TRAP_PER_CPU_RESUM_MONDO_PA 0x20
#define TRAP_PER_CPU_RESUM_KBUF_PA 0x28
#define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30
#define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38
#define TRAP_PER_CPU_FAULT_INFO 0x40
#define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0
#define TRAP_PER_CPU_CPU_LIST_PA 0xc8
#define TRAP_PER_CPU_TSB_HUGE 0xd0
#define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8
#define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0
#define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8
#define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec
#define TRAP_PER_CPU_RESUM_QMASK 0xf0
#define TRAP_PER_CPU_NONRESUM_QMASK 0xf4
#define TRAP_PER_CPU_PER_CPU_BASE 0xf8
#define TRAP_BLOCK_SZ_SHIFT 8
#include <asm/scratchpad.h>
#define __GET_CPUID(REG) \
/* Spitfire implementation (default). */ \
661: ldxa [%g0] ASI_UPA_CONFIG, REG; \
srlx REG, 17, REG; \
and REG, 0x1f, REG; \
nop; \
.section .cpuid_patch, "ax"; \
/* Instruction location. */ \
.word 661b; \
/* Cheetah Safari implementation. */ \
ldxa [%g0] ASI_SAFARI_CONFIG, REG; \
srlx REG, 17, REG; \
and REG, 0x3ff, REG; \
nop; \
/* Cheetah JBUS implementation. */ \
ldxa [%g0] ASI_JBUS_CONFIG, REG; \
srlx REG, 17, REG; \
and REG, 0x1f, REG; \
nop; \
/* Starfire implementation. */ \
sethi %hi(0x1fff40000d0 >> 9), REG; \
sllx REG, 9, REG; \
or REG, 0xd0, REG; \
lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\
/* sun4v implementation. */ \
mov SCRATCHPAD_CPUID, REG; \
ldxa [REG] ASI_SCRATCHPAD, REG; \
nop; \
nop; \
.previous;
#ifdef CONFIG_SMP
#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
__GET_CPUID(TMP) \
sethi %hi(trap_block), DEST; \
sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
or DEST, %lo(trap_block), DEST; \
add DEST, TMP, DEST; \
/* Clobbers TMP, current address space PGD phys address into DEST. */
#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
#define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;
/* Clobbers TMP, loads DEST with current thread info pointer. */
#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
/* Given the current thread info pointer in THR, load the per-cpu
* area base of the current processor into DEST. REG1, REG2, and REG3 are
* clobbered.
*
* You absolutely cannot use DEST as a temporary in this code. The
* reason is that traps can happen during execution, and return from
* trap will load the fully resolved DEST per-cpu base. This can corrupt
* the calculations done by the macro mid-stream.
*/
#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \
lduh [THR + TI_CPU], REG1; \
sethi %hi(trap_block), REG2; \
sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \
or REG2, %lo(trap_block), REG2; \
add REG2, REG1, REG2; \
ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST;
#else
#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
sethi %hi(trap_block), DEST; \
or DEST, %lo(trap_block), DEST; \
/* Uniprocessor versions, we know the cpuid is zero. */
#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
#define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;
#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
/* No per-cpu areas on uniprocessor, so no need to load DEST. */
#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
#endif /* !(CONFIG_SMP) */
#endif /* _SPARC_TRAP_BLOCK_H */
|
