diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2012-10-03 19:23:11 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-11-12 03:34:03 +0100 |
| commit | 836db26b1cd5ebf712f0e847e6f3db87f1204fa2 (patch) | |
| tree | a95b9e791db069a9f5db41c83a37f0554b4ac4d4 /src/mainboard/intel/emeraldlake2 | |
| parent | f5a11aa82f66a77a4b79b602604a8516ca187c3b (diff) | |
ACPI: Zero pstate/cstate control values in FADT
If these values are non-zero then the kernel will issue
an SMI for each core (cstate) and package (pstate).
Since we don't do anything with these SMI callbacks we
can avoid taking the extra SMIs at boot time by zeroing
these fields.
Change-Id: I3bc5fe0a9f45141d46884cb77ecdfaeaa45d2439
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1769
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/mainboard/intel/emeraldlake2')
| -rw-r--r-- | src/mainboard/intel/emeraldlake2/fadt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mainboard/intel/emeraldlake2/fadt.c b/src/mainboard/intel/emeraldlake2/fadt.c index ff840c0910..315cb5895e 100644 --- a/src/mainboard/intel/emeraldlake2/fadt.c +++ b/src/mainboard/intel/emeraldlake2/fadt.c @@ -47,7 +47,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->acpi_enable = APM_CNT_ACPI_ENABLE; fadt->acpi_disable = APM_CNT_ACPI_DISABLE; fadt->s4bios_req = 0x0; - fadt->pstate_cnt = APM_CNT_PST_CONTROL; + fadt->pstate_cnt = 0; fadt->pm1a_evt_blk = pmbase; fadt->pm1b_evt_blk = 0x0; @@ -65,7 +65,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->gpe0_blk_len = 16; fadt->gpe1_blk_len = 0; fadt->gpe1_base = 0; - fadt->cst_cnt = APM_CNT_CST_CONTROL; + fadt->cst_cnt = 0; fadt->p_lvl2_lat = 1; fadt->p_lvl3_lat = 87; fadt->flush_size = 1024; |