1 #ifndef _SPARC_TRAP_BLOCK_H
2 #define _SPARC_TRAP_BLOCK_H
4 #include <asm/hypervisor.h>
9 /* Trap handling code needs to get at a few critical values upon
10 * trap entry and to process TSB misses. These cannot be in the
11 * per_cpu() area as we really need to lock them into the TLB and
12 * thus make them part of the main kernel image. As a result we
13 * try to make this as small as possible.
15 * This is padded out and aligned to 64-bytes to avoid false sharing
19 /* If you modify the size of this structure, please update
20 * TRAP_BLOCK_SZ_SHIFT below.
24 /* D-cache line 1: Basic thread information, cpu and device mondo queues */
25 struct thread_info
*thread
;
26 unsigned long pgd_paddr
;
27 unsigned long cpu_mondo_pa
;
28 unsigned long dev_mondo_pa
;
30 /* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
31 unsigned long resum_mondo_pa
;
32 unsigned long resum_kernel_buf_pa
;
33 unsigned long nonresum_mondo_pa
;
34 unsigned long nonresum_kernel_buf_pa
;
36 /* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */
37 struct hv_fault_status fault_info
;
39 /* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */
40 unsigned long cpu_mondo_block_pa
;
41 unsigned long cpu_list_pa
;
42 unsigned long tsb_huge
;
43 unsigned long tsb_huge_temp
;
45 /* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size. */
46 unsigned long irq_worklist_pa
;
47 unsigned int cpu_mondo_qmask
;
48 unsigned int dev_mondo_qmask
;
49 unsigned int resum_qmask
;
50 unsigned int nonresum_qmask
;
51 unsigned long __per_cpu_base
;
52 } __attribute__((aligned(64)));
53 extern struct trap_per_cpu trap_block
[NR_CPUS
];
54 void init_cur_cpu_trap(struct thread_info
*);
56 extern int ncpus_probed
;
57 extern u64 cpu_mondo_counter
[NR_CPUS
];
59 unsigned long real_hard_smp_processor_id(void);
61 struct cpuid_patch_entry
{
63 unsigned int cheetah_safari
[4];
64 unsigned int cheetah_jbus
[4];
65 unsigned int starfire
[4];
66 unsigned int sun4v
[4];
68 extern struct cpuid_patch_entry __cpuid_patch
, __cpuid_patch_end
;
70 struct sun4v_1insn_patch_entry
{
74 extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch
,
75 __sun4v_1insn_patch_end
;
76 extern struct sun4v_1insn_patch_entry __fast_win_ctrl_1insn_patch
,
77 __fast_win_ctrl_1insn_patch_end
;
79 struct sun4v_2insn_patch_entry
{
81 unsigned int insns
[2];
83 extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch
,
84 __sun4v_2insn_patch_end
;
85 extern struct sun4v_2insn_patch_entry __sun_m7_2insn_patch
,
86 __sun_m7_2insn_patch_end
;
89 #endif /* !(__ASSEMBLY__) */
91 #define TRAP_PER_CPU_THREAD 0x00
92 #define TRAP_PER_CPU_PGD_PADDR 0x08
93 #define TRAP_PER_CPU_CPU_MONDO_PA 0x10
94 #define TRAP_PER_CPU_DEV_MONDO_PA 0x18
95 #define TRAP_PER_CPU_RESUM_MONDO_PA 0x20
96 #define TRAP_PER_CPU_RESUM_KBUF_PA 0x28
97 #define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30
98 #define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38
99 #define TRAP_PER_CPU_FAULT_INFO 0x40
100 #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0
101 #define TRAP_PER_CPU_CPU_LIST_PA 0xc8
102 #define TRAP_PER_CPU_TSB_HUGE 0xd0
103 #define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8
104 #define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0
105 #define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8
106 #define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec
107 #define TRAP_PER_CPU_RESUM_QMASK 0xf0
108 #define TRAP_PER_CPU_NONRESUM_QMASK 0xf4
109 #define TRAP_PER_CPU_PER_CPU_BASE 0xf8
111 #define TRAP_BLOCK_SZ_SHIFT 8
113 #include <asm/scratchpad.h>
115 #define __GET_CPUID(REG) \
116 /* Spitfire implementation (default). */ \
117 661: ldxa [%g0] ASI_UPA_CONFIG, REG; \
119 and REG, 0x1f, REG; \
121 .section .cpuid_patch, "ax"; \
122 /* Instruction location. */ \
124 /* Cheetah Safari implementation. */ \
125 ldxa [%g0] ASI_SAFARI_CONFIG, REG; \
127 and REG, 0x3ff, REG; \
129 /* Cheetah JBUS implementation. */ \
130 ldxa [%g0] ASI_JBUS_CONFIG, REG; \
132 and REG, 0x1f, REG; \
134 /* Starfire implementation. */ \
135 sethi %hi(0x1fff40000d0 >> 9), REG; \
138 lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\
139 /* sun4v implementation. */ \
140 mov SCRATCHPAD_CPUID, REG; \
141 ldxa [REG] ASI_SCRATCHPAD, REG; \
148 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
150 sethi %hi(trap_block), DEST; \
151 sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
152 or DEST, %lo(trap_block), DEST; \
153 add DEST, TMP, DEST; \
155 /* Clobbers TMP, current address space PGD phys address into DEST. */
156 #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
157 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
158 ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
160 /* Clobbers TMP, loads local processor's IRQ work area into DEST. */
161 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
162 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
163 add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;
165 /* Clobbers TMP, loads DEST with current thread info pointer. */
166 #define TRAP_LOAD_THREAD_REG(DEST, TMP) \
167 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
168 ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
170 /* Given the current thread info pointer in THR, load the per-cpu
171 * area base of the current processor into DEST. REG1, REG2, and REG3 are
174 * You absolutely cannot use DEST as a temporary in this code. The
175 * reason is that traps can happen during execution, and return from
176 * trap will load the fully resolved DEST per-cpu base. This can corrupt
177 * the calculations done by the macro mid-stream.
179 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \
180 lduh [THR + TI_CPU], REG1; \
181 sethi %hi(trap_block), REG2; \
182 sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \
183 or REG2, %lo(trap_block), REG2; \
184 add REG2, REG1, REG2; \
185 ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST;
189 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
190 sethi %hi(trap_block), DEST; \
191 or DEST, %lo(trap_block), DEST; \
193 /* Uniprocessor versions, we know the cpuid is zero. */
194 #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
195 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
196 ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
198 /* Clobbers TMP, loads local processor's IRQ work area into DEST. */
199 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
200 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
201 add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;
203 #define TRAP_LOAD_THREAD_REG(DEST, TMP) \
204 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
205 ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
207 /* No per-cpu areas on uniprocessor, so no need to load DEST. */
208 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
210 #endif /* !(CONFIG_SMP) */
212 #endif /* _SPARC_TRAP_BLOCK_H */