LXR qemu/tests/pnv-xscom-test.c

   1/*
   2 * QTest testcase for PowerNV XSCOM bus
   3 *
   4 * Copyright (c) 2016, IBM Corporation.
   5 *
   6 * This work is licensed under the terms of the GNU GPL, version 2 or
   7 * later. See the COPYING file in the top-level directory.
   8 */
   9#include "qemu/osdep.h"
  10
  11#include "libqtest.h"
  12
  13typedef enum PnvChipType {
  14    PNV_CHIP_POWER8E,     /* AKA Murano (default) */
  15    PNV_CHIP_POWER8,      /* AKA Venice */
  16    PNV_CHIP_POWER8NVL,   /* AKA Naples */
  17    PNV_CHIP_POWER9,      /* AKA Nimbus */
  18} PnvChipType;
  19
  20typedef struct PnvChip {
  21    PnvChipType chip_type;
  22    const char *cpu_model;
  23    uint64_t    xscom_base;
  24    uint64_t    xscom_core_base;
  25    uint64_t    cfam_id;
  26    uint32_t    first_core;
  27} PnvChip;
  28
  29static const PnvChip pnv_chips[] = {
  30    {
  31        .chip_type  = PNV_CHIP_POWER8,
  32        .cpu_model  = "POWER8",
  33        .xscom_base = 0x0003fc0000000000ull,
  34        .xscom_core_base = 0x10000000ull,
  35        .cfam_id    = 0x220ea04980000000ull,
  36        .first_core = 0x1,
  37    }, {
  38        .chip_type  = PNV_CHIP_POWER8NVL,
  39        .cpu_model  = "POWER8NVL",
  40        .xscom_base = 0x0003fc0000000000ull,
  41        .xscom_core_base = 0x10000000ull,
  42        .cfam_id    = 0x120d304980000000ull,
  43        .first_core = 0x1,
  44    }, {
  45        .chip_type  = PNV_CHIP_POWER9,
  46        .cpu_model  = "POWER9",
  47        .xscom_base = 0x000603fc00000000ull,
  48        .xscom_core_base = 0x0ull,
  49        .cfam_id    = 0x100d104980000000ull,
  50        .first_core = 0x20,
  51    },
  52};
  53
  54static uint64_t pnv_xscom_addr(const PnvChip *chip, uint32_t pcba)
  55{
  56    uint64_t addr = chip->xscom_base;
  57
  58    if (chip->chip_type == PNV_CHIP_POWER9) {
  59        addr |= ((uint64_t) pcba << 3);
  60    } else {
  61        addr |= (((uint64_t) pcba << 4) & ~0xffull) |
  62            (((uint64_t) pcba << 3) & 0x78);
  63    }
  64    return addr;
  65}
  66
  67static uint64_t pnv_xscom_read(const PnvChip *chip, uint32_t pcba)
  68{
  69    return readq(pnv_xscom_addr(chip, pcba));
  70}
  71
  72static void test_xscom_cfam_id(const PnvChip *chip)
  73{
  74    uint64_t f000f = pnv_xscom_read(chip, 0xf000f);
  75
  76    g_assert_cmphex(f000f, ==, chip->cfam_id);
  77}
  78
  79static void test_cfam_id(const void *data)
  80{
  81    char *args;
  82    const PnvChip *chip = data;
  83
  84    args = g_strdup_printf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
  85
  86    qtest_start(args);
  87    test_xscom_cfam_id(chip);
  88    qtest_quit(global_qtest);
  89
  90    g_free(args);
  91}
  92
  93#define PNV_XSCOM_EX_CORE_BASE(chip, i)                 \
  94    ((chip)->xscom_core_base | (((uint64_t)i) << 24))
  95#define PNV_XSCOM_EX_DTS_RESULT0     0x50000
  96
  97static void test_xscom_core(const PnvChip *chip)
  98{
  99    uint32_t first_core_dts0 =
 100        PNV_XSCOM_EX_CORE_BASE(chip, chip->first_core) |
 101        PNV_XSCOM_EX_DTS_RESULT0;
 102    uint64_t dts0 = pnv_xscom_read(chip, first_core_dts0);
 103
 104    g_assert_cmphex(dts0, ==, 0x26f024f023f0000ull);
 105}
 106
 107static void test_core(const void *data)
 108{
 109    char *args;
 110    const PnvChip *chip = data;
 111
 112    args = g_strdup_printf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
 113
 114    qtest_start(args);
 115    test_xscom_core(chip);
 116    qtest_quit(global_qtest);
 117
 118    g_free(args);
 119}
 120
 121static void add_test(const char *name, void (*test)(const void *data))
 122{
 123    int i;
 124
 125    for (i = 0; i < ARRAY_SIZE(pnv_chips); i++) {
 126        char *tname = g_strdup_printf("pnv-xscom/%s/%s", name,
 127                                      pnv_chips[i].cpu_model);
 128        qtest_add_data_func(tname, &pnv_chips[i], test);
 129        g_free(tname);
 130    }
 131}
 132
 133int main(int argc, char **argv)
 134{
 135    g_test_init(&argc, &argv, NULL);
 136
 137    add_test("cfam_id", test_cfam_id);
 138    add_test("core", test_core);
 139    return g_test_run();
 140}
 141