Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4891
-gerrit
commit fd2bf39984cd22390bdaa9a5ac1828aa3586a7fd Author: Aaron Durbin adurbin@chromium.org Date: Mon Oct 21 22:24:40 2013 -0500
x86: Add SMM helper functions to MP infrastructure
In order for the cpu code to start SMM relocation 2 new functions are added to be shared: - void smm_initiate_relocation_parallel() - void smm_initiate_relocation() The both initiate an SMI on the currently running cpu. The 2 variants allow for parallel relocation or serialized relocation.
BUG=chrome-os-partner:22862 BRANCH=None TEST=Built and booted rambi using these functions.
Change-Id: I325777bac27e9a0efc3f54f7223c38310604c5a2 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/173982 --- src/cpu/x86/mp_init.c | 31 +++++++++++++++++++++++++++++++ src/include/cpu/x86/mp.h | 9 +++++++++ 2 files changed, 40 insertions(+)
diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c index 242d656..676c2f6 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); +} + diff --git a/src/include/cpu/x86/mp.h b/src/include/cpu/x86/mp.h index 5112848..7e90ee4 100644 --- a/src/include/cpu/x86/mp.h +++ b/src/include/cpu/x86/mp.h @@ -117,4 +117,13 @@ void mp_initialize_cpu(void *unused); /* Returns apic id for coreboot cpu number or < 0 on failure. */ int mp_get_apic_id(int cpu_slot);
+/* + * SMM helpers to use with initializing CPUs. + */ + +/* Send SMI to self without any serialization. */ +void smm_initiate_relocation_parallel(void); +/* Send SMI to self with single execution. */ +void smm_initiate_relocation(void); + #endif /* _X86_MP_H_ */