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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>
This commit is contained in:
Duncan Laurie 2012-10-03 19:23:11 -07:00 committed by Stefan Reinauer
parent f5a11aa82f
commit 836db26b1c
3 changed files with 6 additions and 6 deletions
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4
src/mainboard/intel/emeraldlake2/fadt.c
View File

@ -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;

4
src/mainboard/samsung/lumpy/fadt.c
View File

@ -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;

4
src/mainboard/samsung/stumpy/fadt.c
View File

@ -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;