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bsd-user/arm/target_arch_elf.h: arm get hwcap 

Implement get_elf_hwcap to get the first word of hardware capabilities.

Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2021-09-23 14:42:42 -06:00
parent 082e65314b
commit 6c5d60fa78
1 changed files with 71 additions and 1 deletions
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72
bsd-user/arm/target_arch_elf.h
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@ -31,6 +31,76 @@
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE 4096
#define ELF_HWCAP 0
#define ELF_HWCAP get_elf_hwcap()
#define GET_FEATURE(feat, hwcap) \
do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
#define GET_FEATURE_ID(feat, hwcap) \
do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
enum {
ARM_HWCAP_ARM_SWP = 1 << 0,
ARM_HWCAP_ARM_HALF = 1 << 1,
ARM_HWCAP_ARM_THUMB = 1 << 2,
ARM_HWCAP_ARM_26BIT = 1 << 3,
ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
ARM_HWCAP_ARM_FPA = 1 << 5,
ARM_HWCAP_ARM_VFP = 1 << 6,
ARM_HWCAP_ARM_EDSP = 1 << 7,
ARM_HWCAP_ARM_JAVA = 1 << 8,
ARM_HWCAP_ARM_IWMMXT = 1 << 9,
ARM_HWCAP_ARM_CRUNCH = 1 << 10,
ARM_HWCAP_ARM_THUMBEE = 1 << 11,
ARM_HWCAP_ARM_NEON = 1 << 12,
ARM_HWCAP_ARM_VFPv3 = 1 << 13,
ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
ARM_HWCAP_ARM_TLS = 1 << 15,
ARM_HWCAP_ARM_VFPv4 = 1 << 16,
ARM_HWCAP_ARM_IDIVA = 1 << 17,
ARM_HWCAP_ARM_IDIVT = 1 << 18,
ARM_HWCAP_ARM_VFPD32 = 1 << 19,
ARM_HWCAP_ARM_LPAE = 1 << 20,
ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
};
static uint32_t get_elf_hwcap(void)
{
ARMCPU *cpu = ARM_CPU(thread_cpu);
uint32_t hwcaps = 0;
hwcaps |= ARM_HWCAP_ARM_SWP;
hwcaps |= ARM_HWCAP_ARM_HALF;
hwcaps |= ARM_HWCAP_ARM_THUMB;
hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
/* probe for the extra features */
/* EDSP is in v5TE and above */
GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
GET_FEATURE_ID(aa32_arm_div, ARM_HWCAP_ARM_IDIVA);
GET_FEATURE_ID(aa32_thumb_div, ARM_HWCAP_ARM_IDIVT);
GET_FEATURE_ID(aa32_vfp, ARM_HWCAP_ARM_VFP);
if (cpu_isar_feature(aa32_fpsp_v3, cpu) ||
cpu_isar_feature(aa32_fpdp_v3, cpu)) {
hwcaps |= ARM_HWCAP_ARM_VFPv3;
if (cpu_isar_feature(aa32_simd_r32, cpu)) {
hwcaps |= ARM_HWCAP_ARM_VFPD32;
} else {
hwcaps |= ARM_HWCAP_ARM_VFPv3D16;
}
}
GET_FEATURE_ID(aa32_simdfmac, ARM_HWCAP_ARM_VFPv4);
return hwcaps;
}
#undef GET_FEATURE
#undef GET_FEATURE_ID
#endif /* _TARGET_ARCH_ELF_H_ */