linux-kernel - [PATCHv5] ARM: EXYNOS: Support secondary CPU boot of Exynos4212

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-id: <1398735462-1938-1-git-send-email-cw00.choi@samsung.com>
Date:	Tue, 29 Apr 2014 10:37:42 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	kgene.kim@...sung.com, t.figa@...sung.com
Cc:	linux@....linux.org.uk, kyungmin.park@...sung.com,
	cw00.choi@...sung.com, inki.dae@...sung.com,
	sw0312.kim@...sung.com, hyunhee.kim@...sung.com,
	yj44.cho@...sung.com, chanho61.park@...sung.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCHv5] ARM: EXYNOS: Support secondary CPU boot of Exynos4212

From: Kyungmin Park <kyungmin.park@...sung.com>

This patch fix the offset of CPU boot address and change parameter of smc call
of SMC_CMD_CPU1BOOT command for Exynos4212.

Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Reviewed-by: Tomasz Figa <t.figa@...sung.com>
---
Changes from v4:
- Post only this patch separated from following patchset[1]
[1] https://lkml.org/lkml/2014/4/24/873

 arch/arm/mach-exynos/firmware.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index 932129e..aa01c42 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -18,6 +18,8 @@
 
 #include <mach/map.h>
 
+#include <plat/cpu.h>
+
 #include "smc.h"
 
 static int exynos_do_idle(void)
@@ -28,13 +30,24 @@ static int exynos_do_idle(void)
 
 static int exynos_cpu_boot(int cpu)
 {
+	/*
+	 * The second parameter of SMC_CMD_CPU1BOOT command means CPU id.
+	 * But, Exynos4212 has only one secondary CPU so second parameter
+	 * isn't used for informing secure firmware about CPU id.
+	 */
+	if (soc_is_exynos4212())
+		cpu = 0;
+
 	exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
 	return 0;
 }
 
 static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
 {
-	void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
+	void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c;
+
+	if (!soc_is_exynos4212())
+		boot_reg += 4*cpu;
 
 	__raw_writel(boot_addr, boot_reg);
 	return 0;
-- 
1.8.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/