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
  13 typedef 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
  20 typedef struct PnvChip {
  21     PnvChipType chip_type;
  22     const char *cpu_model;
  23     uint64_t    xscom_base;
  24     uint64_t    cfam_id;
  25     uint32_t    first_core;
  26 } PnvChip;
  27
  28 static const PnvChip pnv_chips[] = {
  29     {
  30         .chip_type  = PNV_CHIP_POWER8,
  31         .cpu_model  = "POWER8",
  32         .xscom_base = 0x0003fc0000000000ull,
  33         .cfam_id    = 0x220ea04980000000ull,
  34         .first_core = 0x1,
  35     }, {
  36         .chip_type  = PNV_CHIP_POWER8NVL,
  37         .cpu_model  = "POWER8NVL",
  38         .xscom_base = 0x0003fc0000000000ull,
  39         .cfam_id    = 0x120d304980000000ull,
  40         .first_core = 0x1,
  41     },
  42 #if 0 /* POWER9 support is not ready yet */
  43     {
  44         .chip_type  = PNV_CHIP_POWER9,
  45         .cpu_model  = "POWER9",
  46         .xscom_base = 0x000603fc00000000ull,
  47         .cfam_id    = 0x220d104900008000ull,
  48         .first_core = 0x0,
  49     },
  50 #endif
  51 };
  52
  53 static uint64_t pnv_xscom_addr(const PnvChip *chip, uint32_t pcba)
  54 {
  55     uint64_t addr = chip->xscom_base;
  56
  57     if (chip->chip_type == PNV_CHIP_POWER9) {
  58         addr |= ((uint64_t) pcba << 3);
  59     } else {
  60         addr |= (((uint64_t) pcba << 4) & ~0xffull) |
  61             (((uint64_t) pcba << 3) & 0x78);
  62     }
  63     return addr;
  64 }
  65
  66 static uint64_t pnv_xscom_read(const PnvChip *chip, uint32_t pcba)
  67 {
  68     return readq(pnv_xscom_addr(chip, pcba));
  69 }
  70
  71 static void test_xscom_cfam_id(const PnvChip *chip)
  72 {
  73     uint64_t f000f = pnv_xscom_read(chip, 0xf000f);
  74
  75     g_assert_cmphex(f000f, ==, chip->cfam_id);
  76 }
  77
  78 static void test_cfam_id(const void *data)
  79 {
  80     const PnvChip *chip = data;
  81
  82     global_qtest = qtest_startf("-M powernv,accel=tcg -cpu %s",
  83                                 chip->cpu_model);
  84     test_xscom_cfam_id(chip);
  85     qtest_quit(global_qtest);
  86 }
  87
  88
  89 #define PNV_XSCOM_EX_CORE_BASE    0x10000000ull
  90 #define PNV_XSCOM_EX_BASE(core) \
  91     (PNV_XSCOM_EX_CORE_BASE | ((uint64_t)(core) << 24))
  92 #define PNV_XSCOM_P9_EC_BASE(core) \
  93     ((uint64_t)(((core) & 0x1F) + 0x20) << 24)
  94
  95 #define PNV_XSCOM_EX_DTS_RESULT0     0x50000
  96
  97 static void test_xscom_core(const PnvChip *chip)
  98 {
  99     uint32_t first_core_dts0 = PNV_XSCOM_EX_DTS_RESULT0;
 100     uint64_t dts0;
 101
 102     if (chip->chip_type != PNV_CHIP_POWER9) {
 103         first_core_dts0 |= PNV_XSCOM_EX_BASE(chip->first_core);
 104     } else {
 105         first_core_dts0 |= PNV_XSCOM_P9_EC_BASE(chip->first_core);
 106     }
 107
 108     dts0 = pnv_xscom_read(chip, first_core_dts0);
 109
 110     g_assert_cmphex(dts0, ==, 0x26f024f023f0000ull);
 111 }
 112
 113 static void test_core(const void *data)
 114 {
 115     const PnvChip *chip = data;
 116
 117     global_qtest = qtest_startf("-M powernv,accel=tcg -cpu %s",
 118                                 chip->cpu_model);
 119     test_xscom_core(chip);
 120     qtest_quit(global_qtest);
 121 }
 122
 123 static void add_test(const char *name, void (*test)(const void *data))
 124 {
 125     int i;
 126
 127     for (i = 0; i < ARRAY_SIZE(pnv_chips); i++) {
 128         char *tname = g_strdup_printf("pnv-xscom/%s/%s", name,
 129                                       pnv_chips[i].cpu_model);
 130         qtest_add_data_func(tname, &pnv_chips[i], test);
 131         g_free(tname);
 132     }
 133 }
 134
 135 int main(int argc, char **argv)
 136 {
 137     g_test_init(&argc, &argv, NULL);
 138
 139     add_test("cfam_id", test_cfam_id);
 140     add_test("core", test_core);
 141     return g_test_run();
 142 }