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[PATCHv2,4/8] ARM: EXYNOS: Support secondary CPU boot of Exynos4212

Message ID 1397527192-21988-5-git-send-email-cw00.choi@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Chanwoo Choi April 15, 2014, 1:59 a.m. UTC 
From: Kyungmin Park <kyungmin.park@samsung.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@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 arch/arm/mach-exynos/firmware.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
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Patch

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;