Implement get_elf_hwcap to get the first word of hardware capabilities.
Signed-off-by: Kyle Evans <kev...@freebsd.org>
Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Warner Losh <i...@bsdimp.com>
Reviewed-by: Kyle Evans <kev...@freebsd.org>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
---
bsd-user/arm/target_arch_elf.h | 72 +++++++++++++++++++++++++++++++++-
1 file changed, 71 insertions(+), 1 deletion(-)
diff --git a/bsd-user/arm/target_arch_elf.h b/bsd-user/arm/target_arch_elf.h
index 15b5c66511f..02d25b89264 100644
--- a/bsd-user/arm/target_arch_elf.h
+++ b/bsd-user/arm/target_arch_elf.h
@@ -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_ */
--
2.33.1
