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   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 */
  57         struct thread_info      *thread;
  58         unsigned long           pgd_paddr;
  59         unsigned long           __pad1[2];
  60
  61 /* D-cache line 2: Sun4V Mondo Queue pointers */
  62         unsigned long           cpu_mondo_pa;
  63         unsigned long           dev_mondo_pa;
  64         unsigned long           resum_mondo_pa;
  65         unsigned long           nonresum_mondo_pa;
  66
  67 /* Dcache lines 3 and 4: Hypervisor Fault Status */
  68         struct hv_fault_status  fault_info;
  69 } __attribute__((aligned(64)));
  70 extern struct trap_per_cpu trap_block[NR_CPUS];
  71 extern void init_cur_cpu_trap(void);
  72 extern void setup_tba(void);
  73
  74 #ifdef CONFIG_SMP
  75 struct cpuid_patch_entry {
  76         unsigned int    addr;
  77         unsigned int    cheetah_safari[4];
  78         unsigned int    cheetah_jbus[4];
  79         unsigned int    starfire[4];
  80         unsigned int    sun4v[4];
  81 };
  82 extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
  83 #endif
  84
  85 struct sun4v_1insn_patch_entry {
  86         unsigned int    addr;
  87         unsigned int    insn;
  88 };
  89 extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch,
  90         __sun4v_1insn_patch_end;
  91
  92 struct sun4v_2insn_patch_entry {
  93         unsigned int    addr;
  94         unsigned int    insns[2];
  95 };
  96 extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
  97         __sun4v_2insn_patch_end;
  98
  99 #endif /* !(__ASSEMBLY__) */
 100
 101 #define TRAP_PER_CPU_THREAD             0x00
 102 #define TRAP_PER_CPU_PGD_PADDR          0x08
 103 #define TRAP_PER_CPU_CPU_MONDO_PA       0x20
 104 #define TRAP_PER_CPU_DEV_MONDO_PA       0x28
 105 #define TRAP_PER_CPU_RESUM_MONDO_PA     0x30
 106 #define TRAP_PER_CPU_NONRESUM_MONDO_PA  0x38
 107 #define TRAP_PER_CPU_FAULT_INFO         0x40
 108
 109 #define TRAP_BLOCK_SZ_SHIFT             7
 110
 111 #include <asm/scratchpad.h>
 112
 113 #ifdef CONFIG_SMP
 114
 115 #define __GET_CPUID(REG)                                \
 116         /* Spitfire implementation (default). */        \
 117 661:    ldxa            [%g0] ASI_UPA_CONFIG, REG;      \
 118         srlx            REG, 17, REG;                   \
 119          and            REG, 0x1f, REG;                 \
 120         nop;                                            \
 121         .section        .cpuid_patch, "ax";             \
 122         /* Instruction location. */                     \
 123         .word           661b;                           \
 124         /* Cheetah Safari implementation. */            \
 125         ldxa            [%g0] ASI_SAFARI_CONFIG, REG;   \
 126         srlx            REG, 17, REG;                   \
 127         and             REG, 0x3ff, REG;                \
 128         nop;                                            \
 129         /* Cheetah JBUS implementation. */              \
 130         ldxa            [%g0] ASI_JBUS_CONFIG, REG;     \
 131         srlx            REG, 17, REG;                   \
 132         and             REG, 0x1f, REG;                 \
 133         nop;                                            \
 134         /* Starfire implementation. */                  \
 135         sethi           %hi(0x1fff40000d0 >> 9), REG;   \
 136         sllx            REG, 9, REG;                    \
 137         or              REG, 0xd0, REG;                 \
 138         lduwa           [REG] ASI_PHYS_BYPASS_EC_E, REG;\
 139         /* sun4v implementation. */                     \
 140         mov             SCRATCHPAD_CPUID, REG;          \
 141         ldxa            [REG] ASI_SCRATCHPAD, REG;      \
 142         nop;                                            \
 143         nop;                                            \
 144         .previous;
 145
 146 /* Clobbers TMP, current address space PGD phys address into DEST.  */
 147 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
 148         __GET_CPUID(TMP)                        \
 149         sethi   %hi(trap_block), DEST;          \
 150         sllx    TMP, TRAP_BLOCK_SZ_SHIFT, TMP;  \
 151         or      DEST, %lo(trap_block), DEST;    \
 152         add     DEST, TMP, DEST;                \
 153         ldx     [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
 154
 155 /* Clobbers TMP, loads local processor's IRQ work area into DEST.  */
 156 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)           \
 157         __GET_CPUID(TMP)                        \
 158         sethi   %hi(__irq_work), DEST;          \
 159         sllx    TMP, 6, TMP;                    \
 160         or      DEST, %lo(__irq_work), DEST;    \
 161         add     DEST, TMP, DEST;
 162
 163 /* Clobbers TMP, loads DEST with current thread info pointer.  */
 164 #define TRAP_LOAD_THREAD_REG(DEST, TMP)         \
 165         __GET_CPUID(TMP)                        \
 166         sethi   %hi(trap_block), DEST;          \
 167         sllx    TMP, TRAP_BLOCK_SZ_SHIFT, TMP;  \
 168         or      DEST, %lo(trap_block), DEST;    \
 169         ldx     [DEST + TMP], DEST;
 170
 171 /* Given the current thread info pointer in THR, load the per-cpu
 172  * area base of the current processor into DEST.  REG1, REG2, and REG3 are
 173  * clobbered.
 174  *
 175  * You absolutely cannot use DEST as a temporary in this code.  The
 176  * reason is that traps can happen during execution, and return from
 177  * trap will load the fully resolved DEST per-cpu base.  This can corrupt
 178  * the calculations done by the macro mid-stream.
 179  */
 180 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)  \
 181         ldub    [THR + TI_CPU], REG1;                   \
 182         sethi   %hi(__per_cpu_shift), REG3;             \
 183         sethi   %hi(__per_cpu_base), REG2;              \
 184         ldx     [REG3 + %lo(__per_cpu_shift)], REG3;    \
 185         ldx     [REG2 + %lo(__per_cpu_base)], REG2;     \
 186         sllx    REG1, REG3, REG3;                       \
 187         add     REG3, REG2, DEST;
 188
 189 #else
 190
 191 /* Uniprocessor versions, we know the cpuid is zero.  */
 192 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
 193         sethi   %hi(trap_block), DEST;          \
 194         or      DEST, %lo(trap_block), DEST;    \
 195         ldx     [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
 196
 197 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)           \
 198         sethi   %hi(__irq_work), DEST;          \
 199         or      DEST, %lo(__irq_work), DEST;
 200
 201 #define TRAP_LOAD_THREAD_REG(DEST, TMP)         \
 202         sethi   %hi(trap_block), DEST;          \
 203         ldx     [DEST + %lo(trap_block)], DEST;
 204
 205 /* No per-cpu areas on uniprocessor, so no need to load DEST.  */
 206 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
 207
 208 #endif /* !(CONFIG_SMP) */
 209
 210 #endif /* _SPARC64_CPUDATA_H */