2 * SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (C) IBM Corporation 2014.
6 #include "rte_cpuflags.h"
13 /* Symbolic values for the entries in the auxiliary table */
17 /* software based registers */
25 typedef uint32_t hwcap_registers_t[REG_MAX];
27 struct feature_entry {
30 #define CPU_FLAG_NAME_MAX_LEN 64
31 char name[CPU_FLAG_NAME_MAX_LEN];
34 #define FEAT_DEF(name, reg, bit) \
35 [RTE_CPUFLAG_##name] = {reg, bit, #name},
37 const struct feature_entry rte_cpu_feature_table[] = {
38 FEAT_DEF(PPC_LE, REG_HWCAP, 0)
39 FEAT_DEF(TRUE_LE, REG_HWCAP, 1)
40 FEAT_DEF(PSERIES_PERFMON_COMPAT, REG_HWCAP, 6)
41 FEAT_DEF(VSX, REG_HWCAP, 7)
42 FEAT_DEF(ARCH_2_06, REG_HWCAP, 8)
43 FEAT_DEF(POWER6_EXT, REG_HWCAP, 9)
44 FEAT_DEF(DFP, REG_HWCAP, 10)
45 FEAT_DEF(PA6T, REG_HWCAP, 11)
46 FEAT_DEF(ARCH_2_05, REG_HWCAP, 12)
47 FEAT_DEF(ICACHE_SNOOP, REG_HWCAP, 13)
48 FEAT_DEF(SMT, REG_HWCAP, 14)
49 FEAT_DEF(BOOKE, REG_HWCAP, 15)
50 FEAT_DEF(CELLBE, REG_HWCAP, 16)
51 FEAT_DEF(POWER5_PLUS, REG_HWCAP, 17)
52 FEAT_DEF(POWER5, REG_HWCAP, 18)
53 FEAT_DEF(POWER4, REG_HWCAP, 19)
54 FEAT_DEF(NOTB, REG_HWCAP, 20)
55 FEAT_DEF(EFP_DOUBLE, REG_HWCAP, 21)
56 FEAT_DEF(EFP_SINGLE, REG_HWCAP, 22)
57 FEAT_DEF(SPE, REG_HWCAP, 23)
58 FEAT_DEF(UNIFIED_CACHE, REG_HWCAP, 24)
59 FEAT_DEF(4xxMAC, REG_HWCAP, 25)
60 FEAT_DEF(MMU, REG_HWCAP, 26)
61 FEAT_DEF(FPU, REG_HWCAP, 27)
62 FEAT_DEF(ALTIVEC, REG_HWCAP, 28)
63 FEAT_DEF(PPC601, REG_HWCAP, 29)
64 FEAT_DEF(PPC64, REG_HWCAP, 30)
65 FEAT_DEF(PPC32, REG_HWCAP, 31)
66 FEAT_DEF(TAR, REG_HWCAP2, 26)
67 FEAT_DEF(LSEL, REG_HWCAP2, 27)
68 FEAT_DEF(EBB, REG_HWCAP2, 28)
69 FEAT_DEF(DSCR, REG_HWCAP2, 29)
70 FEAT_DEF(HTM, REG_HWCAP2, 30)
71 FEAT_DEF(ARCH_2_07, REG_HWCAP2, 31)
75 * Read AUXV software register and get cpu features for Power
78 rte_cpu_get_features(hwcap_registers_t out)
80 out[REG_HWCAP] = rte_cpu_getauxval(AT_HWCAP);
81 out[REG_HWCAP2] = rte_cpu_getauxval(AT_HWCAP2);
85 * Checks if a particular flag is available on current machine.
88 rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
90 const struct feature_entry *feat;
91 hwcap_registers_t regs = {0};
93 if (feature >= RTE_CPUFLAG_NUMFLAGS)
96 feat = &rte_cpu_feature_table[feature];
97 if (feat->reg == REG_NONE)
100 rte_cpu_get_features(regs);
101 return (regs[feat->reg] >> feat->bit) & 1;
105 rte_cpu_get_flag_name(enum rte_cpu_flag_t feature)
107 if (feature >= RTE_CPUFLAG_NUMFLAGS)
109 return rte_cpu_feature_table[feature].name;