From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752980Ab3AVFwm (ORCPT ); Tue, 22 Jan 2013 00:52:42 -0500 Received: from hqemgate03.nvidia.com ([216.228.121.140]:19712 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752631Ab3AVFwk (ORCPT ); Tue, 22 Jan 2013 00:52:40 -0500 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Mon, 21 Jan 2013 21:52:15 -0800 From: Hiroshi Doyu To: CC: , , , Hiroshi Doyu , Russell King , Stephen Warren , , Subject: [v3 1/2] ARM: Add API to detect SCU base address from CP15 Date: Tue, 22 Jan 2013 07:52:01 +0200 Message-ID: <1358833924-24535-1-git-send-email-hdoyu@nvidia.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add API to detect SCU base address from CP15. Signed-off-by: Hiroshi Doyu --- 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 + +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