diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2009-02-11 13:13:56 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-02-12 10:59:44 +0000 |
| commit | 7279dc3e914635ab4b288ec39383272a06c466f3 (patch) | |
| tree | fd5801c660dc1d3b262cde513ba3baaf2f89e13b /arch/arm | |
| parent | 3d1228ead618b88e8606015cbabc49019981805d (diff) | |
| download | linux-3.10-7279dc3e914635ab4b288ec39383272a06c466f3.tar.gz linux-3.10-7279dc3e914635ab4b288ec39383272a06c466f3.tar.bz2 linux-3.10-7279dc3e914635ab4b288ec39383272a06c466f3.zip | |
[ARM] 5388/1: Add hwcap bits for VFPv3 and VFPv3D16
The VFPv3D16 is a VFPv3 CPU configuration where only 16 double registers
are present, as the VFPv2 configuration. This patch adds the
corresponding hwcap bits so that applications or debuggers have more
information about the supported features.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/hwcap.h | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 12 |
3 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/include/asm/hwcap.h b/arch/arm/include/asm/hwcap.h index bda489f9f01..f7bd52b1c36 100644 --- a/arch/arm/include/asm/hwcap.h +++ b/arch/arm/include/asm/hwcap.h @@ -17,6 +17,8 @@ #define HWCAP_CRUNCH 1024 #define HWCAP_THUMBEE 2048 #define HWCAP_NEON 4096 +#define HWCAP_VFPv3 8192 +#define HWCAP_VFPv3D16 16384 #if defined(__KERNEL__) && !defined(__ASSEMBLY__) /* diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 7049815d66d..645ec743668 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -779,6 +779,8 @@ static const char *hwcap_str[] = { "crunch", "thumbee", "neon", + "vfpv3", + "vfpv3d16", NULL }; diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index 7e1239041b3..75457b30d81 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -476,6 +476,18 @@ static int __init vfp_init(void) * in place; report VFP support to userspace. */ elf_hwcap |= HWCAP_VFP; +#ifdef CONFIG_VFPv3 + if (VFP_arch >= 3) { + elf_hwcap |= HWCAP_VFPv3; + + /* + * Check for VFPv3 D16. CPUs in this configuration + * only have 16 x 64bit registers. + */ + if (((fmrx(MVFR0) & MVFR0_A_SIMD_MASK)) == 1) + elf_hwcap |= HWCAP_VFPv3D16; + } +#endif #ifdef CONFIG_NEON /* * Check for the presence of the Advanced SIMD |