cpu/intel/model_206ax: Use parallel MP init
This patch adds a few southbridge calls needed for parallel MP init.
Moves the smm_relocate() function to smm/gen1/smi.h, since that is
where this function is defined now.
Tested on Thinkpad X220, shaves off ~30ms on a 2 core, 4 threads CPU.
Change-Id: Ia1d547ed4a3cb6746a0222c3e54e94e5848b0dd7
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/25618
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/common/smi.c b/src/southbridge/intel/common/smi.c
index af9dd5d..40f5412 100644
--- a/src/southbridge/intel/common/smi.c
+++ b/src/southbridge/intel/common/smi.c
@@ -154,3 +154,29 @@
"d" (APM_CNT)
);
}
+
+void southbridge_smm_clear_state(void)
+{
+ u32 smi_en;
+
+ if (IS_ENABLED(CONFIG_ELOG))
+ /* Log events from chipset before clearing */
+ pch_log_state();
+
+ printk(BIOS_DEBUG, "Initializing Southbridge SMI...\n");
+ printk(BIOS_SPEW, " ... pmbase = 0x%04x\n", get_pmbase());
+
+ smi_en = inl(get_pmbase() + SMI_EN);
+ if (smi_en & APMC_EN) {
+ printk(BIOS_INFO, "SMI# handler already enabled?\n");
+ return;
+ }
+
+ printk(BIOS_DEBUG, "\n");
+
+ /* Dump and clear status registers */
+ reset_smi_status();
+ reset_pm1_status();
+ reset_tco_status();
+ reset_gpe0_status();
+}