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authorTomasz Figa <t.figa@samsung.com>2012-12-11 13:58:43 +0900
committerKukjin Kim <kgene.kim@samsung.com>2013-04-09 01:52:30 +0900
commitbeddf63fc8e01f06799bd6d7a2dd879885bbc9c6 (patch)
tree449ab2a2f4298d7c79285d3830a2cdb73833a040 /arch/arm/mach-exynos/platsmp.c
parent41de89860baf8e62fd74e83338058575398ad21f (diff)
ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
Boards using secure firmware must use different CPU boot registers and call secure firmware to boot the CPU. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos/platsmp.c')
-rw-r--r--arch/arm/mach-exynos/platsmp.c32
1 files changed, 27 insertions, 5 deletions
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 60f7c5be057d..a083e0591a56 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -25,6 +25,7 @@
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
+#include <asm/firmware.h>
#include <mach/hardware.h>
#include <mach/regs-clock.h>
@@ -145,10 +146,21 @@ static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct
timeout = jiffies + (1 * HZ);
while (time_before(jiffies, timeout)) {
+ unsigned long boot_addr;
+
smp_rmb();
- __raw_writel(virt_to_phys(exynos4_secondary_startup),
- cpu_boot_reg(phys_cpu));
+ boot_addr = virt_to_phys(exynos4_secondary_startup);
+
+ /*
+ * Try to set boot address using firmware first
+ * and fall back to boot register if it fails.
+ */
+ if (call_firmware_op(set_cpu_boot_addr, phys_cpu, boot_addr))
+ __raw_writel(boot_addr, cpu_boot_reg(phys_cpu));
+
+ call_firmware_op(cpu_boot, phys_cpu);
+
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
if (pen_release == -1)
@@ -204,10 +216,20 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
* system-wide flags register. The boot monitor waits
* until it receives a soft interrupt, and then the
* secondary CPU branches to this address.
+ *
+ * Try using firmware operation first and fall back to
+ * boot register if it fails.
*/
- for (i = 1; i < max_cpus; ++i)
- __raw_writel(virt_to_phys(exynos4_secondary_startup),
- cpu_boot_reg(cpu_logical_map(i)));
+ for (i = 1; i < max_cpus; ++i) {
+ unsigned long phys_cpu;
+ unsigned long boot_addr;
+
+ phys_cpu = cpu_logical_map(i);
+ boot_addr = virt_to_phys(exynos4_secondary_startup);
+
+ if (call_firmware_op(set_cpu_boot_addr, phys_cpu, boot_addr))
+ __raw_writel(boot_addr, cpu_boot_reg(phys_cpu));
+ }
}
struct smp_operations exynos_smp_ops __initdata = {