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soc/intel/xeon_sp: Configure P2SB BAR in bootblock 

In order to use early serial output we need to enable P2SB BAR0, because
that allows PCR access to PCH registers.

TEST=tested on OCP Tioga Pass

Change-Id: I476f90b2df67b8045582f0b72dd680dea5a9a275
Signed-off-by: Andrey Petrov <anpetrov@fb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39781
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Andrey Petrov 2020-03-22 22:27:44 -07:00
parent 403f215cb4
commit 335384d2b7
1 changed files with 6 additions and 0 deletions
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6
src/soc/intel/xeon_sp/bootblock.c
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@ -21,6 +21,7 @@
#include <console/console.h>
#include <cpu/x86/mtrr.h>
#include <intelblocks/lpc_lib.h>
#include <soc/pci_devs.h>
const FSPT_UPD temp_ram_init_params = {
.FspUpdHeader = {
@ -54,6 +55,11 @@ void bootblock_soc_early_init(void)
{
fast_spi_early_init(SPI_BASE_ADDRESS);
pch_enable_lpc();
/* Set up P2SB BAR. This is needed for PCR to work */
uint8_t p2sb_cmd = pci_mmio_read_config8(PCH_DEV_P2SB, PCI_COMMAND);
pci_mmio_write_config8(PCH_DEV_P2SB, PCI_COMMAND, p2sb_cmd | PCI_COMMAND_MEMORY);
pci_mmio_write_config32(PCH_DEV_P2SB, PCI_BASE_ADDRESS_0, CONFIG_PCR_BASE_ADDRESS);
}
void bootblock_soc_init(void)