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 #include <asm/hypervisor.h>
  10 #include <asm/asi.h>
  11
  12 #ifndef __ASSEMBLY__
  13
  14 #include <linux/percpu.h>
  15 #include <linux/threads.h>
  16
  17 typedef struct {
  18         /* Dcache line 1 */
  19         unsigned int    __softirq_pending; /* must be 1st, see rtrap.S */
  20         unsigned int    multiplier;
  21         unsigned int    counter;
  22         unsigned int    idle_volume;
  23         unsigned long   clock_tick;     /* %tick's per second */
  24         unsigned long   udelay_val;
  25
  26         /* Dcache line 2, rarely used */
  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;
  33         unsigned int    __pad3;
  34         unsigned int    __pad4;
  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
  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 {
  56 /* D-cache line 1: Basic thread information, cpu and device mondo queues */
  57         struct thread_info      *thread;
  58         unsigned long           pgd_paddr;
  59         unsigned long           cpu_mondo_pa;
  60         unsigned long           dev_mondo_pa;
  61
  62 /* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
  63         unsigned long           resum_mondo_pa;
  64         unsigned long           resum_kernel_buf_pa;
  65         unsigned long           nonresum_mondo_pa;
  66         unsigned long           nonresum_kernel_buf_pa;
  67
  68 /* Dcache lines 3 and 4: Hypervisor Fault Status */
  69         struct hv_fault_status  fault_info;
  70 } __attribute__((aligned(64)));
  71 extern struct trap_per_cpu trap_block[NR_CPUS];
  72 extern void init_cur_cpu_trap(void);
  73 extern void setup_tba(void);
  74
  75 #ifdef CONFIG_SMP
  76 struct cpuid_patch_entry {
  77         unsigned int    addr;
  78         unsigned int    cheetah_safari[4];
  79         unsigned int    cheetah_jbus[4];
  80         unsigned int    starfire[4];
  81         unsigned int    sun4v[4];
  82 };
  83 extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
  84 #endif
  85
  86 struct sun4v_1insn_patch_entry {
  87         unsigned int    addr;
  88         unsigned int    insn;
  89 };
  90 extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch,
  91         __sun4v_1insn_patch_end;
  92
  93 struct sun4v_2insn_patch_entry {
  94         unsigned int    addr;
  95         unsigned int    insns[2];
  96 };
  97 extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
  98         __sun4v_2insn_patch_end;
  99
 100 #endif /* !(__ASSEMBLY__) */
 101
 102 #define TRAP_PER_CPU_THREAD             0x00
 103 #define TRAP_PER_CPU_PGD_PADDR          0x08
 104 #define TRAP_PER_CPU_CPU_MONDO_PA       0x10
 105 #define TRAP_PER_CPU_DEV_MONDO_PA       0x18
 106 #define TRAP_PER_CPU_RESUM_MONDO_PA     0x20
 107 #define TRAP_PER_CPU_RESUM_KBUF_PA      0x28
 108 #define TRAP_PER_CPU_NONRESUM_MONDO_PA  0x30
 109 #define TRAP_PER_CPU_NONRESUM_KBUF_PA   0x38
 110 #define TRAP_PER_CPU_FAULT_INFO         0x40
 111
 112 #define TRAP_BLOCK_SZ_SHIFT             7
 113
 114 #include <asm/scratchpad.h>
 115
 116 #ifdef CONFIG_SMP
 117
 118 #define __GET_CPUID(REG)                                \
 119         /* Spitfire implementation (default). */        \
 120 661:    ldxa            [%g0] ASI_UPA_CONFIG, REG;      \
 121         srlx            REG, 17, REG;                   \
 122          and            REG, 0x1f, REG;                 \
 123         nop;                                            \
 124         .section        .cpuid_patch, "ax";             \
 125         /* Instruction location. */                     \
 126         .word           661b;                           \
 127         /* Cheetah Safari implementation. */            \
 128         ldxa            [%g0] ASI_SAFARI_CONFIG, REG;   \
 129         srlx            REG, 17, REG;                   \
 130         and             REG, 0x3ff, REG;                \
 131         nop;                                            \
 132         /* Cheetah JBUS implementation. */              \
 133         ldxa            [%g0] ASI_JBUS_CONFIG, REG;     \
 134         srlx            REG, 17, REG;                   \
 135         and             REG, 0x1f, REG;                 \
 136         nop;                                            \
 137         /* Starfire implementation. */                  \
 138         sethi           %hi(0x1fff40000d0 >> 9), REG;   \
 139         sllx            REG, 9, REG;                    \
 140         or              REG, 0xd0, REG;                 \
 141         lduwa           [REG] ASI_PHYS_BYPASS_EC_E, REG;\
 142         /* sun4v implementation. */                     \
 143         mov             SCRATCHPAD_CPUID, REG;          \
 144         ldxa            [REG] ASI_SCRATCHPAD, REG;      \
 145         nop;                                            \
 146         nop;                                            \
 147         .previous;
 148
 149 /* Clobbers TMP, current address space PGD phys address into DEST.  */
 150 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
 151         __GET_CPUID(TMP)                        \
 152         sethi   %hi(trap_block), DEST;          \
 153         sllx    TMP, TRAP_BLOCK_SZ_SHIFT, TMP;  \
 154         or      DEST, %lo(trap_block), DEST;    \
 155         add     DEST, TMP, DEST;                \
 156         ldx     [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
 157
 158 /* Clobbers TMP, loads local processor's IRQ work area into DEST.  */
 159 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)           \
 160         __GET_CPUID(TMP)                        \
 161         sethi   %hi(__irq_work), DEST;          \
 162         sllx    TMP, 6, TMP;                    \
 163         or      DEST, %lo(__irq_work), DEST;    \
 164         add     DEST, TMP, DEST;
 165
 166 /* Clobbers TMP, loads DEST with current thread info pointer.  */
 167 #define TRAP_LOAD_THREAD_REG(DEST, TMP)         \
 168         __GET_CPUID(TMP)                        \
 169         sethi   %hi(trap_block), DEST;          \
 170         sllx    TMP, TRAP_BLOCK_SZ_SHIFT, TMP;  \
 171         or      DEST, %lo(trap_block), DEST;    \
 172         ldx     [DEST + TMP], DEST;
 173
 174 /* Given the current thread info pointer in THR, load the per-cpu
 175  * area base of the current processor into DEST.  REG1, REG2, and REG3 are
 176  * clobbered.
 177  *
 178  * You absolutely cannot use DEST as a temporary in this code.  The
 179  * reason is that traps can happen during execution, and return from
 180  * trap will load the fully resolved DEST per-cpu base.  This can corrupt
 181  * the calculations done by the macro mid-stream.
 182  */
 183 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)  \
 184         ldub    [THR + TI_CPU], REG1;                   \
 185         sethi   %hi(__per_cpu_shift), REG3;             \
 186         sethi   %hi(__per_cpu_base), REG2;              \
 187         ldx     [REG3 + %lo(__per_cpu_shift)], REG3;    \
 188         ldx     [REG2 + %lo(__per_cpu_base)], REG2;     \
 189         sllx    REG1, REG3, REG3;                       \
 190         add     REG3, REG2, DEST;
 191
 192 #else
 193
 194 #define __GET_CPUID(REG)                                \
 195         mov     0, REG;
 196
 197 /* Uniprocessor versions, we know the cpuid is zero.  */
 198 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
 199         sethi   %hi(trap_block), DEST;          \
 200         or      DEST, %lo(trap_block), DEST;    \
 201         ldx     [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
 202
 203 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)           \
 204         sethi   %hi(__irq_work), DEST;          \
 205         or      DEST, %lo(__irq_work), DEST;
 206
 207 #define TRAP_LOAD_THREAD_REG(DEST, TMP)         \
 208         sethi   %hi(trap_block), DEST;          \
 209         ldx     [DEST + %lo(trap_block)], DEST;
 210
 211 /* No per-cpu areas on uniprocessor, so no need to load DEST.  */
 212 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
 213
 214 #endif /* !(CONFIG_SMP) */
 215
 216 #endif /* _SPARC64_CPUDATA_H */