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     {
  43         .chip_type  = PNV_CHIP_POWER9,
  44         .cpu_model  = "POWER9",
  45         .xscom_base = 0x000603fc00000000ull,
  46         .cfam_id    = 0x220d104900008000ull,
  47         .first_core = 0x0,
  48     },
  49 };
  50
  51 static uint64_t pnv_xscom_addr(const PnvChip *chip, uint32_t pcba)
  52 {
  53     uint64_t addr = chip->xscom_base;
  54
  55     if (chip->chip_type == PNV_CHIP_POWER9) {
  56         addr |= ((uint64_t) pcba << 3);
  57     } else {
  58         addr |= (((uint64_t) pcba << 4) & ~0xffull) |
  59             (((uint64_t) pcba << 3) & 0x78);
  60     }
  61     return addr;
  62 }
  63
  64 static uint64_t pnv_xscom_read(QTestState *qts, const PnvChip *chip,
  65                                uint32_t pcba)
  66 {
  67     return qtest_readq(qts, pnv_xscom_addr(chip, pcba));
  68 }
  69
  70 static void test_xscom_cfam_id(QTestState *qts, const PnvChip *chip)
  71 {
  72     uint64_t f000f = pnv_xscom_read(qts, chip, 0xf000f);
  73
  74     g_assert_cmphex(f000f, ==, chip->cfam_id);
  75 }
  76
  77 static void test_cfam_id(const void *data)
  78 {
  79     const PnvChip *chip = data;
  80     QTestState *qts;
  81
  82     qts = qtest_initf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
  83     test_xscom_cfam_id(qts, chip);
  84     qtest_quit(qts);
  85 }
  86
  87
  88 #define PNV_XSCOM_EX_CORE_BASE    0x10000000ull
  89 #define PNV_XSCOM_EX_BASE(core) \
  90     (PNV_XSCOM_EX_CORE_BASE | ((uint64_t)(core) << 24))
  91 #define PNV_XSCOM_P9_EC_BASE(core) \
  92     ((uint64_t)(((core) & 0x1F) + 0x20) << 24)
  93
  94 #define PNV_XSCOM_EX_DTS_RESULT0     0x50000
  95
  96 static void test_xscom_core(QTestState *qts, const PnvChip *chip)
  97 {
  98     uint32_t first_core_dts0 = PNV_XSCOM_EX_DTS_RESULT0;
  99     uint64_t dts0;
 100
 101     if (chip->chip_type != PNV_CHIP_POWER9) {
 102         first_core_dts0 |= PNV_XSCOM_EX_BASE(chip->first_core);
 103     } else {
 104         first_core_dts0 |= PNV_XSCOM_P9_EC_BASE(chip->first_core);
 105     }
 106
 107     dts0 = pnv_xscom_read(qts, chip, first_core_dts0);
 108
 109     g_assert_cmphex(dts0, ==, 0x26f024f023f0000ull);
 110 }
 111
 112 static void test_core(const void *data)
 113 {
 114     const PnvChip *chip = data;
 115     QTestState *qts;
 116
 117     qts = qtest_initf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
 118     test_xscom_core(qts, chip);
 119     qtest_quit(qts);
 120 }
 121
 122 static void add_test(const char *name, void (*test)(const void *data))
 123 {
 124     int i;
 125
 126     for (i = 0; i < ARRAY_SIZE(pnv_chips); i++) {
 127         char *tname = g_strdup_printf("pnv-xscom/%s/%s", name,
 128                                       pnv_chips[i].cpu_model);
 129         qtest_add_data_func(tname, &pnv_chips[i], test);
 130         g_free(tname);
 131     }
 132 }
 133
 134 int main(int argc, char **argv)
 135 {
 136     g_test_init(&argc, &argv, NULL);
 137
 138     add_test("cfam_id", test_cfam_id);
 139     add_test("core", test_core);
 140     return g_test_run();
 141 }