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authorRob Herring <rob.herring@calxeda.com>2012-12-30 10:15:05 -0600
committerOlof Johansson <olof@lixom.net>2013-01-07 21:08:25 -0800
commit0b3455a71e38b9c8cf4c2e791c909618c0a72078 (patch)
treecb74263e3414f9fa4dcf7d50e41aee834723ebb7
parentc05ee88f6f20746aff938a85ef49e777ef4c6513 (diff)
downloadconfigs-0b3455a71e38b9c8cf4c2e791c909618c0a72078.tar.gz
ARM: highbank: fix secondary boot and hotplug
With commit 384a290 (ARM: gic: use a private mapping for CPU target interfaces), wake-up IPIs now go to all cores as the gic cpu interface numbering may not follow core numbering. This broke secondary boot on highbank since the boot address was already set for all secondary cores, this caused all cores to boot before the kernel was ready. Fix this by moving the setting of the jump address to highbank_boot_secondary instead of highbank_smp_prepare_cpus and highbank_cpu_die. Also, clear the address when we boot. This prevents cores from booting before they are actually triggered and is also necessary to get suspend/resume to work. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
-rw-r--r--arch/arm/mach-highbank/hotplug.c2
-rw-r--r--arch/arm/mach-highbank/platsmp.c12
2 files changed, 2 insertions, 12 deletions
diff --git a/arch/arm/mach-highbank/hotplug.c b/arch/arm/mach-highbank/hotplug.c
index 7b60faccd55..f30c5284339 100644
--- a/arch/arm/mach-highbank/hotplug.c
+++ b/arch/arm/mach-highbank/hotplug.c
@@ -30,7 +30,7 @@ void __ref highbank_cpu_die(unsigned int cpu)
{
flush_cache_all();
- highbank_set_cpu_jump(cpu, secondary_startup);
+ highbank_set_cpu_jump(cpu, phys_to_virt(0));
highbank_set_core_pwr();
cpu_do_idle();
diff --git a/arch/arm/mach-highbank/platsmp.c b/arch/arm/mach-highbank/platsmp.c
index 1129957f6c1..4ecc864ac8b 100644
--- a/arch/arm/mach-highbank/platsmp.c
+++ b/arch/arm/mach-highbank/platsmp.c
@@ -32,6 +32,7 @@ static void __cpuinit highbank_secondary_init(unsigned int cpu)
static int __cpuinit highbank_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
+ highbank_set_cpu_jump(cpu, secondary_startup);
gic_raise_softirq(cpumask_of(cpu), 0);
return 0;
}
@@ -61,19 +62,8 @@ static void __init highbank_smp_init_cpus(void)
static void __init highbank_smp_prepare_cpus(unsigned int max_cpus)
{
- int i;
-
if (scu_base_addr)
scu_enable(scu_base_addr);
-
- /*
- * Write the address of secondary startup into the jump table
- * The cores are in wfi and wait until they receive a soft interrupt
- * and a non-zero value to jump to. Then the secondary CPU branches
- * to this address.
- */
- for (i = 1; i < max_cpus; i++)
- highbank_set_cpu_jump(i, secondary_startup);
}
struct smp_operations highbank_smp_ops __initdata = {