diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/x86/mp_init.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c index 242d656144..676c2f6ae4 100644 --- a/src/cpu/x86/mp_init.c +++ b/src/cpu/x86/mp_init.c @@ -584,3 +584,34 @@ int mp_get_apic_id(int cpu_slot) return cpus[cpu_slot].apic_id; } + +void smm_initiate_relocation_parallel(void) +{ + if ((lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY)) { + printk(BIOS_DEBUG, "Waiting for ICR not to be busy..."); + if (apic_wait_timeout(1000 /* 1 ms */, 50)) { + printk(BIOS_DEBUG, "timed out. Aborting.\n"); + return; + } else + printk(BIOS_DEBUG, "done.\n"); + } + + lapic_write_around(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(lapicid())); + lapic_write_around(LAPIC_ICR, LAPIC_INT_ASSERT | LAPIC_DM_SMI); + if (apic_wait_timeout(1000 /* 1 ms */, 100 /* us */)) { + printk(BIOS_DEBUG, "SMI Relocation timed out.\n"); + } else + printk(BIOS_DEBUG, "Relocation complete.\n"); + +} + +DECLARE_SPIN_LOCK(smm_relocation_lock); + +/* Send SMI to self with single user serialization. */ +void smm_initiate_relocation(void) +{ + spin_lock(&smm_relocation_lock); + smm_initiate_relocation_parallel(); + spin_unlock(&smm_relocation_lock); +} + |