commit f74b6e351c921f2505691f5ece834b280e500395
author Eric Lai <ericr_lai@compal.corp-partner.google.com> Thu Jan 23 14:43:08 2020 +0800
committer Patrick Georgi <pgeorgi@google.com> Mon Jan 27 07:43:06 2020 +0000
tree 22137a1ecd25e2cd790ddbff68f089f12160e44a
parent ec430ee343bdceaf21a7be462e8f856102bd2c09

ec/google/wilco: add ec command set cpu id

Add new mailbox command support. Set CPU ID and cores to EC.
EC will according to different CPU to set different power table.

BUG=b:148126144

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: I135d2421d2106934be996a1780786f6bb0bf6b34
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38526
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Mathew King <mathewk@chromium.org>

src/ec/google/wilco/commands.c

diff --git a/src/ec/google/wilco/commands.c b/src/ec/google/wilco/commands.c
index 626f9dd..791141e 100644
--- a/src/ec/google/wilco/commands.c
+++ b/src/ec/google/wilco/commands.c
@@ -224,3 +224,29 @@
 	wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, KB_ERR_CODE,
 			 &err_code, 1, NULL, 0);
 }
+
+/*
+ * EC CPU ID data struct
+ * MBOX[2] = 0xFF
+ * MBOX[3] = CPUID_Low
+ * MBOX[4] = CPUID_Mid
+ * MBOX[5] = CPUID_High
+ * MBOX[6] = CPU_Core
+ * MBOX[7] = GPU_Core
+ * MBOX[8] = Reserved
+ */
+int wilco_ec_set_cpuid(uint32_t cpuid, uint8_t cpu_cores, uint8_t gpu_cores)
+{
+	uint8_t cpu_id[7] = {0}, i;
+
+	cpu_id[0] = 0xff;
+	for (i = 1; i < 4; i++) {
+		cpu_id[i] = cpuid & 0xff;
+		cpuid = cpuid >> 8;
+	}
+	cpu_id[4] = cpu_cores;
+	cpu_id[5] = gpu_cores;
+
+	return wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, KB_CPU_ID, cpu_id,
+				ARRAY_SIZE(cpu_id), NULL, 0);
+}

src/ec/google/wilco/commands.h

diff --git a/src/ec/google/wilco/commands.h b/src/ec/google/wilco/commands.h
index 9a18580..3d2ae46 100644
--- a/src/ec/google/wilco/commands.h
+++ b/src/ec/google/wilco/commands.h
@@ -52,6 +52,8 @@
 	KB_BIOS_PROGRESS = 0xc2,
 	/* Inform the EC that a fatal error occurred */
 	KB_ERR_CODE = 0x7b,
+	/* Set CPU ID */
+	KB_CPU_ID = 0xbf,
 };
 
 enum ec_ram_addr {
@@ -337,4 +339,18 @@
  */
 void wilco_ec_save_post_code(uint8_t post_code);
 
+/**
+ * wilco_ec_set_cpuid
+ *
+ * Set CPU ID to EC.
+ *
+ * @cpuid:	read CPU ID from cpu_eax(1)
+ * @cpu_cores:	cores of CPU
+ * @gpu_cores:	cores of GPU
+ *
+ * Returns 0 if EC command was successful
+ * Returns -1 if EC command failed
+ */
+int wilco_ec_set_cpuid(uint32_t cpuid, uint8_t cpu_cores, uint8_t gpu_cores);
+
 #endif /* EC_GOOGLE_WILCO_COMMANDS_H */