[SPARC64]: Add sun4v case to __GET_CPUID() patch tables.
[linux-2.6] / include / asm-sparc64 / cpudata.h
1 /* cpudata.h: Per-cpu parameters.
2  *
3  * Copyright (C) 2003, 2005, 2006 David S. Miller (davem@davemloft.net)
4  */
5
6 #ifndef _SPARC64_CPUDATA_H
7 #define _SPARC64_CPUDATA_H
8
9 #ifndef __ASSEMBLY__
10
11 #include <linux/percpu.h>
12 #include <linux/threads.h>
13
14 typedef struct {
15         /* Dcache line 1 */
16         unsigned int    __softirq_pending; /* must be 1st, see rtrap.S */
17         unsigned int    multiplier;
18         unsigned int    counter;
19         unsigned int    idle_volume;
20         unsigned long   clock_tick;     /* %tick's per second */
21         unsigned long   udelay_val;
22
23         /* Dcache line 2, rarely used */
24         unsigned int    dcache_size;
25         unsigned int    dcache_line_size;
26         unsigned int    icache_size;
27         unsigned int    icache_line_size;
28         unsigned int    ecache_size;
29         unsigned int    ecache_line_size;
30         unsigned int    __pad3;
31         unsigned int    __pad4;
32 } cpuinfo_sparc;
33
34 DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data);
35 #define cpu_data(__cpu)         per_cpu(__cpu_data, (__cpu))
36 #define local_cpu_data()        __get_cpu_var(__cpu_data)
37
38 /* Trap handling code needs to get at a few critical values upon
39  * trap entry and to process TSB misses.  These cannot be in the
40  * per_cpu() area as we really need to lock them into the TLB and
41  * thus make them part of the main kernel image.  As a result we
42  * try to make this as small as possible.
43  *
44  * This is padded out and aligned to 64-bytes to avoid false sharing
45  * on SMP.
46  */
47
48 /* If you modify the size of this structure, please update
49  * TRAP_BLOCK_SZ_SHIFT below.
50  */
51 struct thread_info;
52 struct trap_per_cpu {
53 /* D-cache line 1 */
54         struct thread_info      *thread;
55         unsigned long           pgd_paddr;
56         unsigned long           __pad1[2];
57
58 /* D-cache line 2 */
59         unsigned long           __pad2[4];
60 } __attribute__((aligned(64)));
61 extern struct trap_per_cpu trap_block[NR_CPUS];
62 extern void init_cur_cpu_trap(void);
63 extern void setup_tba(void);
64
65 #ifdef CONFIG_SMP
66 struct cpuid_patch_entry {
67         unsigned int    addr;
68         unsigned int    cheetah_safari[4];
69         unsigned int    cheetah_jbus[4];
70         unsigned int    starfire[4];
71         unsigned int    sun4v[4];
72 };
73 extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
74 #endif
75
76 #endif /* !(__ASSEMBLY__) */
77
78 #define TRAP_PER_CPU_THREAD     0x00
79 #define TRAP_PER_CPU_PGD_PADDR  0x08
80
81 #define TRAP_BLOCK_SZ_SHIFT     6
82
83 #include <asm/scratchpad.h>
84
85 #ifdef CONFIG_SMP
86
87 #define __GET_CPUID(REG)                                \
88         /* Spitfire implementation (default). */        \
89 661:    ldxa            [%g0] ASI_UPA_CONFIG, REG;      \
90         srlx            REG, 17, REG;                   \
91          and            REG, 0x1f, REG;                 \
92         nop;                                            \
93         .section        .cpuid_patch, "ax";             \
94         /* Instruction location. */                     \
95         .word           661b;                           \
96         /* Cheetah Safari implementation. */            \
97         ldxa            [%g0] ASI_SAFARI_CONFIG, REG;   \
98         srlx            REG, 17, REG;                   \
99         and             REG, 0x3ff, REG;                \
100         nop;                                            \
101         /* Cheetah JBUS implementation. */              \
102         ldxa            [%g0] ASI_JBUS_CONFIG, REG;     \
103         srlx            REG, 17, REG;                   \
104         and             REG, 0x1f, REG;                 \
105         nop;                                            \
106         /* Starfire implementation. */                  \
107         sethi           %hi(0x1fff40000d0 >> 9), REG;   \
108         sllx            REG, 9, REG;                    \
109         or              REG, 0xd0, REG;                 \
110         lduwa           [REG] ASI_PHYS_BYPASS_EC_E, REG;\
111         /* sun4v implementation. */                     \
112         mov             SCRATCHPAD_CPUID, REG;          \
113         nop;                                            \
114         ldxa            [REG] ASI_SCRATCHPAD, REG;      \
115         nop;                                            \
116         .previous;
117
118 /* Clobbers TMP, current address space PGD phys address into DEST.  */
119 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
120         __GET_CPUID(TMP)                        \
121         sethi   %hi(trap_block), DEST;          \
122         sllx    TMP, TRAP_BLOCK_SZ_SHIFT, TMP;  \
123         or      DEST, %lo(trap_block), DEST;    \
124         add     DEST, TMP, DEST;                \
125         ldx     [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
126
127 /* Clobbers TMP, loads local processor's IRQ work area into DEST.  */
128 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)           \
129         __GET_CPUID(TMP)                        \
130         sethi   %hi(__irq_work), DEST;          \
131         sllx    TMP, 6, TMP;                    \
132         or      DEST, %lo(__irq_work), DEST;    \
133         add     DEST, TMP, DEST;
134
135 /* Clobbers TMP, loads DEST with current thread info pointer.  */
136 #define TRAP_LOAD_THREAD_REG(DEST, TMP)         \
137         __GET_CPUID(TMP)                        \
138         sethi   %hi(trap_block), DEST;          \
139         sllx    TMP, TRAP_BLOCK_SZ_SHIFT, TMP;  \
140         or      DEST, %lo(trap_block), DEST;    \
141         ldx     [DEST + TMP], DEST;
142
143 /* Given the current thread info pointer in THR, load the per-cpu
144  * area base of the current processor into DEST.  REG1, REG2, and REG3 are
145  * clobbered.
146  *
147  * You absolutely cannot use DEST as a temporary in this code.  The
148  * reason is that traps can happen during execution, and return from
149  * trap will load the fully resolved DEST per-cpu base.  This can corrupt
150  * the calculations done by the macro mid-stream.
151  */
152 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)  \
153         ldub    [THR + TI_CPU], REG1;                   \
154         sethi   %hi(__per_cpu_shift), REG3;             \
155         sethi   %hi(__per_cpu_base), REG2;              \
156         ldx     [REG3 + %lo(__per_cpu_shift)], REG3;    \
157         ldx     [REG2 + %lo(__per_cpu_base)], REG2;     \
158         sllx    REG1, REG3, REG3;                       \
159         add     REG3, REG2, DEST;
160
161 #else
162
163 /* Uniprocessor versions, we know the cpuid is zero.  */
164 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
165         sethi   %hi(trap_block), DEST;          \
166         or      DEST, %lo(trap_block), DEST;    \
167         ldx     [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
168
169 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)           \
170         sethi   %hi(__irq_work), DEST;          \
171         or      DEST, %lo(__irq_work), DEST;
172
173 #define TRAP_LOAD_THREAD_REG(DEST, TMP)         \
174         sethi   %hi(trap_block), DEST;          \
175         ldx     [DEST + %lo(trap_block)], DEST;
176
177 /* No per-cpu areas on uniprocessor, so no need to load DEST.  */
178 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
179
180 #endif /* !(CONFIG_SMP) */
181
182 #endif /* _SPARC64_CPUDATA_H */