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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>
This commit is contained in:
Eric Lai 2020-01-23 14:43:08 +08:00 committed by Patrick Georgi
parent ec430ee343
commit f74b6e351c
2 changed files with 42 additions and 0 deletions
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26
src/ec/google/wilco/commands.c
View File

@ -224,3 +224,29 @@ void die_notify(void)
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);
}

16
src/ec/google/wilco/commands.h
View File

@ -52,6 +52,8 @@ enum {
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 @@ int wilco_ec_signed_fw(void);
*/
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 */