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authorAaron Durbin <adurbin@chromium.org>2013-10-21 22:24:40 -0500
committerAaron Durbin <adurbin@google.com>2014-01-30 06:05:38 +0100
commitcd3f8ad235b9fbcb21950004f9f31b019e43c08a (patch)
treead222041c1ff337b66f09ee07b9f4e6f6361cd81 /src
parentd0520406ed3f7dc6a36d1b49b2623eafd0b498fb (diff)
downloadcoreboot-cd3f8ad235b9fbcb21950004f9f31b019e43c08a.tar.xz
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 Reviewed-on: http://review.coreboot.org/4891 Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src')
-rw-r--r--src/cpu/x86/mp_init.c31
-rw-r--r--src/include/cpu/x86/mp.h9
2 files changed, 40 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);
+}
+
diff --git a/src/include/cpu/x86/mp.h b/src/include/cpu/x86/mp.h
index 5112848e94..7e90ee43c7 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_ */