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soc/intel/alderlake: Refactor `pmc_lockdown_cfg` function 

This patch refactors the `pmc_lockdown_cfg()` to remove the helper
functions and uses the `setbits32` function to enforce bit locking
as applicable.

BUG=b:211954778
TEST=Able to build google/redrix with these changes and boot to OS.
> localhost ~ # iotools mmio_read32 0xfe0018c4
0x85000000 (bit 31 is set)
> localhost ~ # iotools mmio_read32 0xfe001024
0x00062610 (bits 4, 17 and 18 are set)

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ic96da4638aa689b5fa47a3356986ca5a0343fe36
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63737
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Subrata Banik 2022-04-20 12:49:42 +05:30
parent f48b84330f
commit 2eec87a553
1 changed files with 5 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
src/soc/intel/alderlake/lockdown.c
View File

@ -12,51 +12,17 @@
#include <soc/pm.h>
#include <stdint.h>
static void pmc_lock_pmsync(void)
{
uint8_t *pmcbase;
uint32_t pmsyncreg;
pmcbase = pmc_mmio_regs();
pmsyncreg = read32(pmcbase + PMSYNC_TPR_CFG);
pmsyncreg |= PCH2CPU_TPR_CFG_LOCK;
write32(pmcbase + PMSYNC_TPR_CFG, pmsyncreg);
}
static void pmc_lock_abase(void)
{
uint8_t *pmcbase;
uint32_t reg32;
pmcbase = pmc_mmio_regs();
reg32 = read32(pmcbase + GEN_PMCON_B);
reg32 |= (SLP_STR_POL_LOCK | ACPI_BASE_LOCK);
write32(pmcbase + GEN_PMCON_B, reg32);
}
static void pmc_lock_smi(void)
{
uint8_t *pmcbase;
uint8_t reg8;
pmcbase = pmc_mmio_regs();
reg8 = read8(pmcbase + GEN_PMCON_B);
reg8 |= SMI_LOCK;
write8(pmcbase + GEN_PMCON_B, reg8);
}
static void pmc_lockdown_cfg(int chipset_lockdown)
{
uint8_t *pmcbase = pmc_mmio_regs();
/* PMSYNC */
pmc_lock_pmsync();
setbits32(pmcbase + PMSYNC_TPR_CFG, PCH2CPU_TPR_CFG_LOCK);
/* Lock down ABASE and sleep stretching policy */
pmc_lock_abase();
setbits32(pmcbase + GEN_PMCON_B, SLP_STR_POL_LOCK | ACPI_BASE_LOCK);
if (chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT)
pmc_lock_smi();
setbits32(pmcbase + GEN_PMCON_B, SMI_LOCK);
}
void soc_lockdown_config(int chipset_lockdown)