From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 04/11] ARM: hwcaps: add new HWCAP defines for ARMv7-A
Date: Mon, 6 Jun 2011 17:55:48 +0100 [thread overview]
Message-ID: <1307379355-13802-5-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1307379355-13802-1-git-send-email-will.deacon@arm.com>
Modern ARMv7-A cores can optionally implement these new hardware
features:
- VFPv4:
The latest version of the ARMv7 vector floating-point extensions,
including hardware support for fused multiple accumulate. D16 or D32
variants may be implemented.
- Integer divide:
The SDIV and UDIV instructions provide signed and unsigned integer
division in hardware. When implemented, these instructions may be
available in either both Thumb and ARM, or Thumb only.
This patch adds new HWCAP defines to describe these new features. The
integer divide capabilities are split into two bits for ARM and Thumb
respectively. Whilst HWCAP_IDIVA should never bet set if HWCAP_IDIVT is
clear, separating the bits makes it easier to interpret from userspace.
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
arch/arm/include/asm/hwcap.h | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/hwcap.h b/arch/arm/include/asm/hwcap.h
index 81512db..69d69f5 100644
--- a/arch/arm/include/asm/hwcap.h
+++ b/arch/arm/include/asm/hwcap.h
@@ -20,6 +20,11 @@
#define HWCAP_VFPv3 (1 << 13)
#define HWCAP_VFPv3D16 (1 << 14)
#define HWCAP_TLS (1 << 15)
+#define HWCAP_VFPv4 (1 << 16)
+#define HWCAP_VFPv4D16 (1 << 17)
+#define HWCAP_IDIVA (1 << 18)
+#define HWCAP_IDIVT (1 << 19)
+#define HWCAP_IDIV (HWCAP_IDIVA | HWCAP_IDIVT)
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
/*
--
1.7.0.4
next prev parent reply other threads:[~2011-06-06 16:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-06 16:55 [PATCH 00/11] Core support for Cortex-A5 and Cortex-A15 Will Deacon
2011-06-06 16:55 ` [PATCH 01/11] arm: Convert v7 proc infos into a common macro Will Deacon
2011-06-06 16:55 ` [PATCH 02/11] arm: Add Cortex A5 proc info Will Deacon
2011-06-06 16:55 ` [PATCH 03/11] ARM: hwcaps: use shifts instead of hardcoded constants Will Deacon
2011-06-06 16:55 ` Will Deacon [this message]
2011-06-06 16:55 ` [PATCH 05/11] ARM: proc: reorder macro parameters for __v7_proc macro Will Deacon
2011-06-06 16:55 ` [PATCH 06/11] ARM: cortex-a5: add HWCAP_VFPv4D16 to proc info structure Will Deacon
2011-06-07 16:17 ` Dave Martin
2011-06-07 16:22 ` Will Deacon
2011-06-08 9:05 ` Dave Martin
2011-06-08 9:24 ` Will Deacon
2011-06-06 16:55 ` [PATCH 07/11] ARM: proc: add proc info for Cortex-A15MP using classic page tables Will Deacon
2011-06-07 16:18 ` Dave Martin
2011-06-06 16:55 ` [PATCH 08/11] ARM: perf: remove confusing comment from v7 perf events backend Will Deacon
2011-06-06 16:55 ` [PATCH 09/11] ARM: perf: add PMUv2 common event definitions Will Deacon
2011-06-07 7:18 ` Jean Pihet
2011-06-07 8:51 ` Will Deacon
2011-06-06 16:55 ` [PATCH 10/11] ARM: perf: add support for the Cortex-A5 PMU Will Deacon
2011-06-06 16:55 ` [PATCH 11/11] ARM: perf: add support for the Cortex-A15 PMU Will Deacon
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