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soc/amd/picasso: Add SMMSTORE support 

Add SMMSTORE support for saving EFI NVRAM variables in
conjuction with Tianocore payload.

Test: none, as this duplicates tested functionality in
amd/stoneyridge.

Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Change-Id: Id05b33edf949611c3f9eac94e7b63a4266c6c4d0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38471
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Marshall Dawson 2020-01-19 10:22:43 -07:00
parent 80556ec247
commit d125593b2e
1 changed files with 24 additions and 0 deletions
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24
src/soc/amd/picasso/smihandler.c
View File

@ -23,6 +23,7 @@
#include <arch/acpi.h>
#include <arch/hlt.h>
#include <device/pci_def.h>
#include <smmstore.h>
#include <soc/smi.h>
#include <soc/southbridge.h>
#include <amdblocks/acpimmio.h>
@ -88,6 +89,25 @@ static void southbridge_smi_gsmi(void)
io_smi->rax = gsmi_exec(sub_command, &reg_ebx);
}
static void southbridge_smi_store(void)
{
u8 sub_command;
amd64_smm_state_save_area_t *io_smi;
u32 reg_ebx;
io_smi = find_save_state(APM_CNT_SMMSTORE);
if (!io_smi)
return;
/* Command and return value in EAX */
sub_command = (io_smi->rax >> 8) & 0xff;
/* Parameter buffer in EBX */
reg_ebx = io_smi->rbx;
/* drivers/smmstore/smi.c */
io_smi->rax = smmstore_exec(sub_command, (void *)reg_ebx);
}
static void sb_apmc_smi_handler(void)
{
const uint8_t cmd = inb(pm_acpi_smi_cmd_port());
@ -103,6 +123,10 @@ static void sb_apmc_smi_handler(void)
if (CONFIG(ELOG_GSMI))
southbridge_smi_gsmi();
break;
case APM_CNT_SMMSTORE:
if (CONFIG(SMMSTORE))
southbridge_smi_store();
break;
}
mainboard_smi_apmc(cmd);