Gitweb: http://git.kernel.org/linus/7279dc3e914635ab4b288ec39383272a06c466f3
Commit: 7279dc3e914635ab4b288ec39383272a06c466f3
Parent: 3d1228ead618b88e8606015cbabc49019981805d
Author: Catalin Marinas <catalin.marinas@arm.com>
AuthorDate: Wed Feb 11 13:13:56 2009 +0100
Committer: Russell King <rmk+kernel@arm.linux.org.uk>
CommitDate: Thu Feb 12 10:59:44 2009 +0000
[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>
---
arch/arm/include/asm/hwcap.h | 2 ++
arch/arm/kernel/setup.c | 2 ++
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 bda489f..f7bd52b 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 7049815..645ec74 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 7e12390..75457b3 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
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
