From: Hiroshi Doyu <hdoyu@nvidia.com>
To: <linux-arm-kernel@lists.infradead.org>
Cc: <arnd@arndb.de>, <olof@lixom.net>, <santosh.shilimkar@ti.com>,
Hiroshi Doyu <hdoyu@nvidia.com>,
Russell King <linux@arm.linux.org.uk>,
Stephen Warren <swarren@wwwdotorg.org>,
<linux-kernel@vger.kernel.org>, <linux-tegra@vger.kernel.org>
Subject: [v3 1/2] ARM: Add API to detect SCU base address from CP15
Date: Tue, 22 Jan 2013 07:52:01 +0200 [thread overview]
Message-ID: <1358833924-24535-1-git-send-email-hdoyu@nvidia.com> (raw)
Add API to detect SCU base address from CP15.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
---
Update: Use Russell's suggestion,
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-January/143321.html
---
arch/arm/include/asm/smp_scu.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/arm/include/asm/smp_scu.h b/arch/arm/include/asm/smp_scu.h
index 4eb6d00..006f026 100644
--- a/arch/arm/include/asm/smp_scu.h
+++ b/arch/arm/include/asm/smp_scu.h
@@ -6,6 +6,23 @@
#define SCU_PM_POWEROFF 3
#ifndef __ASSEMBLER__
+
+#include <asm/cputype.h>
+
+static inline bool scu_a9_has_base(void)
+{
+ return read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9;
+}
+
+static inline unsigned long scu_a9_get_base(void)
+{
+ unsigned long pa;
+
+ asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));
+
+ return pa;
+}
+
unsigned int scu_get_core_count(void __iomem *);
void scu_enable(void __iomem *);
int scu_power_mode(void __iomem *, unsigned int);
--
1.7.9.5
next reply other threads:[~2013-01-22 5:52 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-22 5:52 Hiroshi Doyu [this message]
2013-01-22 5:52 ` [v3 2/2] ARM: tegra: Skip scu_enable(scu_base) if not Cortex A9 Hiroshi Doyu
2013-01-22 6:07 ` Santosh Shilimkar
2013-01-22 16:57 ` Stephen Warren
2013-01-22 17:04 ` Olof Johansson
2013-01-23 8:58 ` Santosh Shilimkar
2013-01-23 10:58 ` Hiroshi Doyu
2013-01-23 11:09 ` Santosh Shilimkar
2013-01-24 5:04 ` Stephen Warren
2013-01-24 5:56 ` Santosh Shilimkar
2013-01-24 6:42 ` Hiroshi Doyu
2013-01-28 7:18 ` Hiroshi Doyu
2013-01-28 14:47 ` Russell King - ARM Linux
2013-01-23 6:04 ` Hiroshi Doyu
2013-01-23 9:27 ` Hiroshi Doyu
2013-01-23 16:37 ` Stephen Warren
2013-01-22 18:35 ` Stephen Warren
2013-01-22 18:46 ` Will Deacon
2013-01-22 18:49 ` Stephen Warren
2013-01-28 18:03 ` [v3 1/2] ARM: Add API to detect SCU base address from CP15 Stephen Warren
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