1. After wake-up, the system-wide flags register loses its value. Hence, write the address of secondary startup function to successfully boot the secondary CPU.
2. Changes SGI1 to SGI0 for secondary CPU boot up Signed-off-by: Inderpal Singh <inderpa...@samsung.com> --- 1. The below patch is mandatory to boot secondary CPU after wake-up from sleep http://permalink.gmane.org/gmane.linux.kernel.samsung-soc/4850 2. The change SGI1 to SGI0 for secondary CPU boot up is done as discussed at following link http://comments.gmane.org/gmane.linux.kernel.samsung-soc/4877 arch/arm/mach-exynos4/platsmp.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-exynos4/platsmp.c b/arch/arm/mach-exynos4/platsmp.c index c5e65a0..061260c 100644 --- a/arch/arm/mach-exynos4/platsmp.c +++ b/arch/arm/mach-exynos4/platsmp.c @@ -101,11 +101,18 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) write_pen_release(cpu); /* + * After wake-up, the system-wide flags register loses its value. + * Hence, write the address of secondary startup function again. + */ + __raw_writel(BSYM(virt_to_phys(exynos4_secondary_startup)), S5P_VA_SYSRAM); + + + /* * Send the secondary CPU a soft interrupt, thereby causing * the boot monitor to read the system wide flags register, * and branch to the address found there. */ - gic_raise_softirq(cpumask_of(cpu), 1); + gic_raise_softirq(cpumask_of(cpu), 0); timeout = jiffies + (1 * HZ); while (time_before(jiffies, timeout)) { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
