From: hdoyu@nvidia.com (Hiroshi Doyu)
To: linux-arm-kernel@lists.infradead.org
Subject: [v3 4/9] ARM: Add API to detect SCU base address from CP15
Date: Tue, 15 Jan 2013 08:14:02 -0000 [thread overview]
Message-ID: <1358237598-32413-5-git-send-email-hdoyu@nvidia.com> (raw)
In-Reply-To: <1358237598-32413-1-git-send-email-hdoyu@nvidia.com>
Add API to detect SCU base address from CP15.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
---
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..f619eef 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 phys_addr_t scu_get_base(void)
+{
+ phys_addr_t pa;
+ unsigned long part_number = read_cpuid_part_number();
+
+ switch (part_number) {
+ case ARM_CPU_PART_CORTEX_A9:
+ /* Get SCU physical base */
+ asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));
+ return pa;
+ default:
+ return 0;
+ }
+}
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 prev parent reply other threads:[~2013-01-15 8:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-15 8:13 [v3 0/9] ARM: Initial support for Tegra 114 SoC Hiroshi Doyu
2013-01-15 8:13 ` [v3 1/9] ARM: tegra: fuse: Add chipid TEGRA114 0x35 Hiroshi Doyu
2013-01-31 16:39 ` Hiroshi Doyu
2013-01-15 8:14 ` [v3 3/9] ARM: tegra: Use DT /cpu node to detect number of CPU core Hiroshi Doyu
2013-01-21 12:35 ` Lorenzo Pieralisi
2013-01-15 8:14 ` [v3 2/9] HACK: ARM: tegra: Use CLK_IGNORE_UNUSED for Tegra 114 SoC Hiroshi Doyu
2013-01-15 8:14 ` Hiroshi Doyu [this message]
2013-01-15 8:14 ` [v3 5/9] ARM: tegra: Skip scu_enable(scu_base) if not Cortex A9 Hiroshi Doyu
2013-01-15 8:14 ` [v3 6/9] ARM: dt: tegra114: Add new SoC base, Tegra 114 SoC Hiroshi Doyu
2013-01-15 16:55 ` Stephen Warren
2013-01-15 17:27 ` Peter De Schrijver
2013-01-16 5:06 ` Hiroshi Doyu
2013-01-15 8:14 ` [v3 7/9] ARM: dt: tegra114: Add new board, Dalmore Hiroshi Doyu
2013-01-15 8:14 ` [v3 8/9] ARM: dt: tegra114: Add new board, Pluto Hiroshi Doyu
2013-01-15 8:14 ` [v3 9/9] ARM: tegra: Add initial support for Tegra 114 SoC Hiroshi Doyu
2013-01-18 10:54 ` [RESEND][v3 4/9] ARM: Add API to detect SCU base address from CP15 Hiroshi Doyu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1358237598-32413-5-git-send-email-hdoyu@nvidia.com \
--to=hdoyu@nvidia.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox