src/soc/intel/common/block/cse: Add hmrfpo related functions to cse lib
Below new functions are added:
* send_hmrfpo_enable_msg() - Sends HMRFPO Enable command to CSE. This
API sets ME in SEC_OVERRIDE mode. The mode prevents CSE to execute SPI I/O
cycles to CSE region, and unlocks the CSE region to perfom updates to it.
* send_hmrfpo_get_status_msg() - Sends HMRFPO Get Status command to CSE
TEST=Verified sending HMRFPO_ENABLE & HMRFPO_GET_STATUS HECI commands on
CML RVP & hatch board
Change-Id: I559bc4641e12df7ed39b1c97097bf068f9a232db
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35229
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: V Sowmya <v.sowmya@intel.com>
diff --git a/src/soc/intel/common/block/cse/cse.c b/src/soc/intel/common/block/cse/cse.c
index 01b2050..debbf1f 100644
--- a/src/soc/intel/common/block/cse/cse.c
+++ b/src/soc/intel/common/block/cse/cse.c
@@ -76,6 +76,16 @@
/* RST Origin */
#define GR_ORIGIN_BIOS_POST 2
+#define MKHI_HMRFPO_GROUP_ID 5
+
+/* HMRFPO Command Ids */
+#define MKHI_HMRFPO_ENABLE 1
+#define MKHI_HMRFPO_GET_STATUS 3
+
+#define ME_HFS_CWS_NORMAL 5
+#define ME_HFS_MODE_NORMAL 0
+#define ME_HFS_TEMP_DISABLE 3
+
static struct cse_device {
uintptr_t sec_bar;
} g_cse;
@@ -619,6 +629,106 @@
return 0;
}
+/* Sends HMRFPO Enable command to CSE */
+int send_hmrfpo_enable_msg(void)
+{
+ struct hmrfpo_enable_msg {
+ struct mkhi_hdr hdr;
+ uint32_t nonce[2];
+ } __packed;
+
+ /* HMRFPO Enable message */
+ struct hmrfpo_enable_msg msg = {
+ .hdr = {
+ .group_id = MKHI_HMRFPO_GROUP_ID,
+ .command = MKHI_HMRFPO_ENABLE,
+ },
+ .nonce = {0},
+ };
+
+ /* HMRFPO Enable response */
+ struct hmrfpo_enable_resp {
+ struct mkhi_hdr hdr;
+ uint32_t fct_base;
+ uint32_t fct_limit;
+ uint8_t status;
+ uint8_t padding[3];
+ } __packed;
+
+ struct hmrfpo_enable_resp resp;
+ size_t resp_size = sizeof(struct hmrfpo_enable_resp);
+ union me_hfsts1 hfs1;
+
+ printk(BIOS_DEBUG, "HECI: Send HMRFPO Enable Command\n");
+ hfs1.data = me_read_config32(PCI_ME_HFSTS1);
+ /*
+ * This command can be run only if:
+ * - Working state is normal and
+ * - Operation mode is normal or temporary disable mode.
+ */
+ if (hfs1.fields.working_state != ME_HFS_CWS_NORMAL ||
+ (hfs1.fields.operation_mode != ME_HFS_MODE_NORMAL &&
+ hfs1.fields.operation_mode != ME_HFS_TEMP_DISABLE)) {
+ printk(BIOS_ERR, "HECI: ME not in required Mode\n");
+ goto failed;
+ }
+
+ if (!heci_send_receive(&msg, sizeof(struct hmrfpo_enable_msg),
+ &resp, &resp_size))
+ goto failed;
+
+ if (resp.hdr.result) {
+ printk(BIOS_ERR, "HECI: Resp Failed:%d\n", resp.hdr.result);
+ goto failed;
+ }
+ return 1;
+
+failed:
+ return 0;
+}
+
+/*
+ * Sends HMRFPO Get Status command to CSE to get the HMRFPO status.
+ * The status can be DISABLES/LOCKED/ENABLED
+ */
+int send_hmrfpo_get_status_msg(void)
+{
+ struct hmrfpo_get_status_msg {
+ struct mkhi_hdr hdr;
+ } __packed;
+
+ struct hmrfpo_get_status_resp {
+ struct mkhi_hdr hdr;
+ uint8_t status;
+ uint8_t padding[3];
+ } __packed;
+
+ struct hmrfpo_get_status_msg msg = {
+ .hdr = {
+ .group_id = MKHI_HMRFPO_GROUP_ID,
+ .command = MKHI_HMRFPO_GET_STATUS,
+ },
+ };
+ struct hmrfpo_get_status_resp resp;
+ size_t resp_size = sizeof(struct hmrfpo_get_status_resp);
+
+ printk(BIOS_INFO, "HECI: Sending Get HMRFPO Status Command\n");
+
+ if (!heci_send_receive(&msg, sizeof(struct hmrfpo_get_status_msg),
+ &resp, &resp_size)) {
+ printk(BIOS_ERR, "HECI: HMRFPO send/receive fail\n");
+ return -1;
+ }
+
+ if (resp.hdr.result) {
+ printk(BIOS_ERR, "HECI: HMRFPO Resp Failed:%d\n",
+ resp.hdr.result);
+ return -1;
+ }
+
+ return resp.status;
+}
+
#if ENV_RAMSTAGE
static void update_sec_bar(struct device *dev)