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Fix hang during secondary CPU sibling init caused by nested spinlocks. 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2022 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Steven J. Magnani 2005-09-12 18:38:10 +00:00
parent e50570112f
commit a7c70bcb3a
1 changed files with 12 additions and 6 deletions
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18
src/cpu/x86/lapic/lapic_cpu_init.c
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@ -227,20 +227,26 @@ int start_cpu(device_t cpu)
}
/* C entry point of secondary cpus */
// secondary_cpu_lock is used to serialize initialization of secondary CPUs
// This can be used to avoid interleaved debugging messages.
static spinlock_t secondary_cpu_lock = SPIN_LOCK_UNLOCKED;
void secondary_cpu_init(void)
{
atomic_inc(&active_cpus);
#if SERIAL_CPU_INIT == 1
#if CONFIG_MAX_CPUS>2
spin_lock(&start_cpu_lock);
#endif
spin_lock(&secondary_cpu_lock);
#endif
cpu_initialize();
#if SERIAL_CPU_INIT == 1
#if CONFIG_MAX_CPUS>2
spin_unlock(&start_cpu_lock);
#endif
spin_unlock(&secondary_cpu_lock);
#endif
atomic_dec(&active_cpus);
stop_this_cpu();
}