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soc/intel/xeon_sp/cpx: Add IMC locks 

Add IMC locks as indicated by the Intel docs.

Change-Id: Id5c43711e80f4e2112c305a9b48d0a4c8509e89b
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52446
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Marc Jones 2021-04-15 16:24:54 -06:00 committed by Felix Held
parent a546e8a300
commit 456b7ba842
2 changed files with 15 additions and 0 deletions
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9
src/soc/intel/xeon_sp/cpx/chip.c
View File

@ -6,6 +6,7 @@
#include <cpu/x86/lapic.h>
#include <cpu/x86/mp.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <intelblocks/acpi.h>
#include <intelblocks/gpio.h>
#include <intelblocks/lpc_lib.h>
@ -159,6 +160,13 @@ static void set_msr_locks(void *unused)
wrmsr(MSR_FEATURE_CONFIG, msr);
}
static void set_imc_locks(void)
{
struct device *dev = 0;
while ((dev = dev_find_device(PCI_VENDOR_ID_INTEL, IMC_M2MEM_DEVID, dev)))
pci_or_config32(dev, IMC_M2MEM_TIMEOUT, TIMEOUT_LOCK);
}
static void chip_final(void *data)
{
/* Lock SBI */
@ -177,6 +185,7 @@ static void chip_final(void *data)
mp_run_on_all_cpus(set_msr_locks, NULL);
set_pcu_locks();
set_imc_locks();
p2sb_hide();
iio_enable_masks();

6
src/soc/intel/xeon_sp/cpx/include/soc/pci_devs.h
View File

@ -118,6 +118,12 @@
#define VTD_EXT_CAP_HIGH 0x14
#define VTD_LTDPR 0x290
/* IMC Devices */
/* Bus: B(2), Device: 9-8, Function: 0 (M2MEM) */
#define IMC_M2MEM_DEVID 0x2066
#define IMC_M2MEM_TIMEOUT 0x104
#define TIMEOUT_LOCK BIT(1)
/* CPU Devices */
#define CBDMA_DEV_NUM 0x04