[coreboot-gerrit] Patch set updated for coreboot: ad903b6 x86: Add SMM helper functions to MP infrastructure
Aaron Durbin (adurbin@google.com)
gerrit at coreboot.org
Tue Jan 28 06:31:39 CET 2014
Aaron Durbin (adurbin at google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4891
-gerrit
commit ad903b6ea6b114616cfe2ea573c350375403de5d
Author: Aaron Durbin <adurbin at 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 at 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_ */
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