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authorJohn E. Kabat Jr <john.kabat@scarletltd.com>2017-10-16 20:23:00 -0600
committerMartin Roth <martinroth@google.com>2017-11-21 01:37:03 +0000
commit7057a27a44e43fa7f018e82121600a7291daffe2 (patch)
treea4ea63d12195e046386b493f454a48dc11a6df94
parent0e022038fc4b02d9df304765d2c4259c4cc7e1bf (diff)
downloadcoreboot-7057a27a44e43fa7f018e82121600a7291daffe2.tar.xz
soc/amd/stoneyridge: Add ELOG to SMM
1. Add ELOG entries to smihandler.c 2. Add save_state utilities that are needed by southbridge_smi_gsmi BUG=b:65485690 Change-Id: I458babe1694f042215dd0e1c3277856e340de86f Signed-off-by: John E. Kabat Jr <john.kabat@scarletltd.com> Reviewed-on: https://review.coreboot.org/21728 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
-rw-r--r--src/soc/amd/stoneyridge/smihandler.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/smihandler.c b/src/soc/amd/stoneyridge/smihandler.c
index a0748fe2fc..7cc8900aa1 100644
--- a/src/soc/amd/stoneyridge/smihandler.c
+++ b/src/soc/amd/stoneyridge/smihandler.c
@@ -24,6 +24,66 @@
#include <device/pci_def.h>
#include <soc/smi.h>
#include <soc/southbridge.h>
+#include <elog.h>
+
+/* bits in smm_io_trap */
+#define SMM_IO_TRAP_PORT_OFFSET 16
+#define SMM_IO_TRAP_PORT_ADDRESS_MASK 0xffff
+#define SMM_IO_TRAP_RW (1 << 0)
+#define SMM_IO_TRAP_VALID (1 << 1)
+
+static inline u16 get_io_address(u32 info)
+{
+ return ((info >> SMM_IO_TRAP_PORT_OFFSET) &
+ SMM_IO_TRAP_PORT_ADDRESS_MASK);
+}
+
+static void *find_save_state(int cmd)
+{
+ int core;
+ amd64_smm_state_save_area_t *state;
+ u32 smm_io_trap;
+ u8 reg_al;
+
+ /* Check all nodes looking for the one that issued the IO */
+ for (core = 0; core < CONFIG_MAX_CPUS; core++) {
+ state = smm_get_save_state(core);
+ smm_io_trap = state->smm_io_trap_offset;
+ /* Check for Valid IO Trap Word (bit1==1) */
+ if (!(smm_io_trap & SMM_IO_TRAP_VALID))
+ continue;
+ /* Make sure it was a write (bit0==0) */
+ if (smm_io_trap & SMM_IO_TRAP_RW)
+ continue;
+ /* Check for APMC IO port */
+ if (pm_acpi_smi_cmd_port() != get_io_address(smm_io_trap))
+ continue;
+ /* Check AL against the requested command */
+ reg_al = state->rax;
+ if (reg_al == cmd)
+ return state;
+ }
+ return NULL;
+}
+
+static void southbridge_smi_gsmi(void)
+{
+ u8 sub_command;
+ amd64_smm_state_save_area_t *io_smi;
+ u32 reg_ebx;
+
+ io_smi = find_save_state(ELOG_GSMI_APM_CNT);
+ 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/elog/gsmi.c */
+ io_smi->rax = gsmi_exec(sub_command, &reg_ebx);
+}
static void sb_apmc_smi_handler(void)
{
@@ -41,6 +101,10 @@ static void sb_apmc_smi_handler(void)
reg32 &= ~(1 << 0); /* clear SCI_EN */
outl(ACPI_PM1_CNT_BLK, reg32);
break;
+ case ELOG_GSMI_APM_CNT:
+ if (IS_ENABLED(CONFIG_ELOG_GSMI))
+ southbridge_smi_gsmi();
+ break;
}
mainboard_smi_apmc(cmd);
@@ -88,6 +152,10 @@ static void sb_slp_typ_handler(void)
}
if (slp_typ >= ACPI_S3) {
+ /* Sleep Type Elog S3, S4, and S5 entry */
+ if (IS_ENABLED(CONFIG_ELOG_GSMI))
+ elog_add_event_byte(ELOG_TYPE_ACPI_ENTER, slp_typ);
+
wbinvd();
disable_all_smi_status();