diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2020-10-29 00:01:29 +0100 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2021-01-24 12:01:09 +0000 |
| commit | 1c7ba62eb75186111bc72a4e6fc958ef09e078f7 (patch) | |
| tree | 2d99dd78524e25f9867b8305f430d65499558c87 /src/cpu | |
| parent | c86b11949506637c281011a0e246e5ae07a9a13b (diff) | |
cpu/intel/haswell: Set C9/C10 vccmin
Backport commit ab7586fa26 (broadwell: Set C9/C10 vccmin) to Haswell.
Change-Id: I9cddc7dd45e96c6f99327ee2583917bf8bedfbdd
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46922
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/haswell/haswell_init.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/cpu/intel/haswell/haswell_init.c b/src/cpu/intel/haswell/haswell_init.c index b1f8bba815..04f58026ae 100644 --- a/src/cpu/intel/haswell/haswell_init.c +++ b/src/cpu/intel/haswell/haswell_init.c @@ -226,6 +226,26 @@ static u32 pcode_mailbox_read(u32 command) return MCHBAR32(BIOS_MAILBOX_DATA); } +static int pcode_mailbox_write(u32 command, u32 data) +{ + if (pcode_ready() < 0) { + printk(BIOS_ERR, "PCODE: mailbox timeout on wait ready.\n"); + return -1; + } + + MCHBAR32(BIOS_MAILBOX_DATA) = data; + + /* Send command and start transaction */ + MCHBAR32(BIOS_MAILBOX_INTERFACE) = command | MAILBOX_RUN_BUSY; + + if (pcode_ready() < 0) { + printk(BIOS_ERR, "PCODE: mailbox timeout on completion.\n"); + return -1; + } + + return 0; +} + static void initialize_vr_config(void) { struct cpu_vr_config vr_config = { 0 }; @@ -300,6 +320,9 @@ static void initialize_vr_config(void) else msr.lo |= 0x006f; /* 1.60V */ wrmsr(MSR_VR_MISC_CONFIG2, msr); + + /* Set C9/C10 VCC Min */ + pcode_mailbox_write(MAILBOX_BIOS_CMD_WRITE_C9C10_VOLTAGE, 0x1f1f); } static void configure_pch_power_sharing(void) |