arch/ppc64/kernel/pacaData.c

   1 /*
   2  * c 2001 PPC 64 Team, IBM Corp
   3  *
   4  *      This program is free software; you can redistribute it and/or
   5  *      modify it under the terms of the GNU General Public License
   6  *      as published by the Free Software Foundation; either version
   7  *      2 of the License, or (at your option) any later version.
   8  */
   9
  10 #include <linux/config.h>
  11 #include <linux/types.h>
  12 #include <linux/threads.h>
  13 #include <linux/module.h>
  14
  15 #include <asm/processor.h>
  16 #include <asm/ptrace.h>
  17 #include <asm/page.h>
  18
  19 #include <asm/lppaca.h>
  20 #include <asm/iseries/it_lp_queue.h>
  21 #include <asm/paca.h>
  22
  23 static union {
  24         struct systemcfg        data;
  25         u8                      page[PAGE_SIZE];
  26 } systemcfg_store __attribute__((__section__(".data.page.aligned")));
  27 struct systemcfg *systemcfg = &systemcfg_store.data;
  28 EXPORT_SYMBOL(systemcfg);
  29
  30
  31 /* This symbol is provided by the linker - let it fill in the paca
  32  * field correctly */
  33 extern unsigned long __toc_start;
  34
  35 /* The Paca is an array with one entry per processor.  Each contains an
  36  * lppaca, which contains the information shared between the
  37  * hypervisor and Linux.  Each also contains an ItLpRegSave area which
  38  * is used by the hypervisor to save registers.
  39  * On systems with hardware multi-threading, there are two threads
  40  * per processor.  The Paca array must contain an entry for each thread.
  41  * The VPD Areas will give a max logical processors = 2 * max physical
  42  * processors.  The processor VPD array needs one entry per physical
  43  * processor (not thread).
  44  */
  45 #define PACA_INIT_COMMON(number, start, asrr, asrv)                         \
  46         .lock_token = 0x8000,                                               \
  47         .paca_index = (number),         /* Paca Index */                    \
  48         .default_decr = 0x00ff0000,     /* Initial Decr */                  \
  49         .kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL,             \
  50         .stab_real = (asrr),            /* Real pointer to segment table */ \
  51         .stab_addr = (asrv),            /* Virt pointer to segment table */ \
  52         .cpu_start = (start),           /* Processor start */               \
  53         .hw_cpu_id = 0xffff,                                                \
  54         .lppaca = {                                                         \
  55                 .desc = 0xd397d781,     /* "LpPa" */                        \
  56                 .size = sizeof(struct lppaca),                              \
  57                 .dyn_proc_status = 2,                                       \
  58                 .decr_val = 0x00ff0000,                                     \
  59                 .fpregs_in_use = 1,                                         \
  60                 .end_of_quantum = 0xfffffffffffffffful,                     \
  61                 .slb_count = 64,                                            \
  62                 .vmxregs_in_use = 0,                                        \
  63         },                                                                  \
  64
  65 #ifdef CONFIG_PPC_ISERIES
  66 #define PACA_INIT_ISERIES(number)                                           \
  67         .lppaca_ptr = &paca[number].lppaca,                                 \
  68         .reg_save_ptr = &paca[number].reg_save,                             \
  69         .reg_save = {                                                       \
  70                 .xDesc = 0xd397d9e2,    /* "LpRS" */                        \
  71                 .xSize = sizeof(struct ItLpRegSave)                         \
  72         }
  73
  74 #define PACA_INIT(number)                                                   \
  75 {                                                                           \
  76         PACA_INIT_COMMON(number, 0, 0, 0)                                   \
  77         PACA_INIT_ISERIES(number)                                           \
  78 }
  79
  80 #define BOOTCPU_PACA_INIT(number)                                           \
  81 {                                                                           \
  82         PACA_INIT_COMMON(number, 1, 0, (u64)&initial_stab)                  \
  83         PACA_INIT_ISERIES(number)                                           \
  84 }
  85
  86 #else
  87 #define PACA_INIT(number)                                                   \
  88 {                                                                           \
  89         PACA_INIT_COMMON(number, 0, 0, 0)                                   \
  90 }
  91
  92 #define BOOTCPU_PACA_INIT(number)                                           \
  93 {                                                                           \
  94         PACA_INIT_COMMON(number, 1, STAB0_PHYS_ADDR, (u64)&initial_stab)    \
  95 }
  96 #endif
  97
  98 struct paca_struct paca[] = {
  99         BOOTCPU_PACA_INIT(0),
 100 #if NR_CPUS > 1
 101         PACA_INIT(  1), PACA_INIT(  2), PACA_INIT(  3),
 102 #if NR_CPUS > 4
 103         PACA_INIT(  4), PACA_INIT(  5), PACA_INIT(  6), PACA_INIT(  7),
 104 #if NR_CPUS > 8
 105         PACA_INIT(  8), PACA_INIT(  9), PACA_INIT( 10), PACA_INIT( 11),
 106         PACA_INIT( 12), PACA_INIT( 13), PACA_INIT( 14), PACA_INIT( 15),
 107         PACA_INIT( 16), PACA_INIT( 17), PACA_INIT( 18), PACA_INIT( 19),
 108         PACA_INIT( 20), PACA_INIT( 21), PACA_INIT( 22), PACA_INIT( 23),
 109         PACA_INIT( 24), PACA_INIT( 25), PACA_INIT( 26), PACA_INIT( 27),
 110         PACA_INIT( 28), PACA_INIT( 29), PACA_INIT( 30), PACA_INIT( 31),
 111 #if NR_CPUS > 32
 112         PACA_INIT( 32), PACA_INIT( 33), PACA_INIT( 34), PACA_INIT( 35),
 113         PACA_INIT( 36), PACA_INIT( 37), PACA_INIT( 38), PACA_INIT( 39),
 114         PACA_INIT( 40), PACA_INIT( 41), PACA_INIT( 42), PACA_INIT( 43),
 115         PACA_INIT( 44), PACA_INIT( 45), PACA_INIT( 46), PACA_INIT( 47),
 116         PACA_INIT( 48), PACA_INIT( 49), PACA_INIT( 50), PACA_INIT( 51),
 117         PACA_INIT( 52), PACA_INIT( 53), PACA_INIT( 54), PACA_INIT( 55),
 118         PACA_INIT( 56), PACA_INIT( 57), PACA_INIT( 58), PACA_INIT( 59),
 119         PACA_INIT( 60), PACA_INIT( 61), PACA_INIT( 62), PACA_INIT( 63),
 120 #if NR_CPUS > 64
 121         PACA_INIT( 64), PACA_INIT( 65), PACA_INIT( 66), PACA_INIT( 67),
 122         PACA_INIT( 68), PACA_INIT( 69), PACA_INIT( 70), PACA_INIT( 71),
 123         PACA_INIT( 72), PACA_INIT( 73), PACA_INIT( 74), PACA_INIT( 75),
 124         PACA_INIT( 76), PACA_INIT( 77), PACA_INIT( 78), PACA_INIT( 79),
 125         PACA_INIT( 80), PACA_INIT( 81), PACA_INIT( 82), PACA_INIT( 83),
 126         PACA_INIT( 84), PACA_INIT( 85), PACA_INIT( 86), PACA_INIT( 87),
 127         PACA_INIT( 88), PACA_INIT( 89), PACA_INIT( 90), PACA_INIT( 91),
 128         PACA_INIT( 92), PACA_INIT( 93), PACA_INIT( 94), PACA_INIT( 95),
 129         PACA_INIT( 96), PACA_INIT( 97), PACA_INIT( 98), PACA_INIT( 99),
 130         PACA_INIT(100), PACA_INIT(101), PACA_INIT(102), PACA_INIT(103),
 131         PACA_INIT(104), PACA_INIT(105), PACA_INIT(106), PACA_INIT(107),
 132         PACA_INIT(108), PACA_INIT(109), PACA_INIT(110), PACA_INIT(111),
 133         PACA_INIT(112), PACA_INIT(113), PACA_INIT(114), PACA_INIT(115),
 134         PACA_INIT(116), PACA_INIT(117), PACA_INIT(118), PACA_INIT(119),
 135         PACA_INIT(120), PACA_INIT(121), PACA_INIT(122), PACA_INIT(123),
 136         PACA_INIT(124), PACA_INIT(125), PACA_INIT(126), PACA_INIT(127),
 137 #endif
 138 #endif
 139 #endif
 140 #endif
 141 #endif
 142 };
 143 EXPORT_SYMBOL(paca);