drivers/ipmi: Add IPMI KCS support in romstage

It's necessary to run IPMI commands in romstage for writing error SEL
such as memory initialization error SEL, and also for other usages
such as starting FRB2 timer, OEM commands, etc.

Add CONFIG_BMC_KCS_BASE for BMC KCS port address that can be used
across romstage and ramstage.

Change-Id: Ie3198965670454b123e570f9056673fdf515f52b
Signed-off-by: Johnny Lin <johnny_lin@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40234
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/drivers/ipmi/ipmi_kcs.h b/src/drivers/ipmi/ipmi_kcs.h
index 910d9212d0..501e5dd8c6 100644
--- a/src/drivers/ipmi/ipmi_kcs.h
+++ b/src/drivers/ipmi/ipmi_kcs.h
@@ -29,6 +29,10 @@ extern int ipmi_kcs_message(int port, int netfn, int lun, int cmd,
 			    const unsigned char *inmsg, int inlen,
 			    unsigned char *outmsg, int outlen);
 
+/* Run basic IPMI init functions in romstage from the provided PnP device,
+ * returns CB_SUCCESS on success and CB_ERR if an error occurred. */
+enum cb_err ipmi_kcs_premem_init(const u16 port, const u16 device);
+
 struct ipmi_rsp {
 	uint8_t lun;
 	uint8_t cmd;