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authorSubrata Banik <subrata.banik@intel.com>2017-12-14 18:22:13 +0530
committerSubrata Banik <subrata.banik@intel.com>2017-12-22 01:41:30 +0000
commit47a655cde3bd667beede719e8f5163381810c1e8 (patch)
treea7c31e7b23fd86c5d826d1205d33f614684bb838 /src/soc/intel/common
parent9c3a7b6a17bfc00086a32691a486355093eed651 (diff)
downloadcoreboot-47a655cde3bd667beede719e8f5163381810c1e8.tar.xz
soc/intel/common: Add missing SoC common function into SMM library
Modify SMM common code in order to accommodate SKL, CNL, APL, GLK SOC code. Change-Id: Ie9f90df3336c1278b73284815b5197400512c1d2 Signed-off-by: Subrata Banik <subrata.banik@intel.com> Reviewed-on: https://review.coreboot.org/22869 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/common')
-rw-r--r--src/soc/intel/common/block/include/intelblocks/smihandler.h11
-rw-r--r--src/soc/intel/common/block/include/intelblocks/smm.h2
-rw-r--r--src/soc/intel/common/block/smm/smihandler.c42
-rw-r--r--src/soc/intel/common/block/smm/smm.c4
4 files changed, 53 insertions, 6 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/smihandler.h b/src/soc/intel/common/block/include/intelblocks/smihandler.h
index 5df5552685..f1e3ecf9cb 100644
--- a/src/soc/intel/common/block/include/intelblocks/smihandler.h
+++ b/src/soc/intel/common/block/include/intelblocks/smihandler.h
@@ -60,6 +60,11 @@ const struct smm_save_state_ops *get_smm_save_state_ops(void);
*/
extern const smi_handler_t southbridge_smi[32];
+#define SMI_HANDLER_SCI_EN(__bit) (1 << (__bit))
+
+/* SMI handlers that should be serviced in SCI mode too. */
+uint32_t smi_handler_get_sci_mask(void);
+
/*
* This function should be implemented in SOC specific code to handle
* the SMI event on SLP_EN. The default functionality is provided in
@@ -145,6 +150,12 @@ void smihandler_southbridge_espi(
int smihandler_disable_busmaster(device_t dev);
/*
+ * SoC needs to implement the mechanism to know if an illegal attempt
+ * has been made to write to the BIOS area.
+ */
+void smihandler_check_illegal_access(uint32_t tco_sts);
+
+/*
* Returns gnvs pointer within SMM context
*/
struct global_nvs_t *smm_get_gnvs(void);
diff --git a/src/soc/intel/common/block/include/intelblocks/smm.h b/src/soc/intel/common/block/include/intelblocks/smm.h
index 84f34a5a7b..f560f24e2b 100644
--- a/src/soc/intel/common/block/include/intelblocks/smm.h
+++ b/src/soc/intel/common/block/include/intelblocks/smm.h
@@ -29,7 +29,7 @@
* SMIs.
*/
void smm_southbridge_clear_state(void);
-void smm_southbridge_enable(void);
+void smm_southbridge_enable(uint16_t pm1_events);
/* API to get SMM region start and size based on Host Bridge register */
void smm_region_info(void **start, size_t *size);
diff --git a/src/soc/intel/common/block/smm/smihandler.c b/src/soc/intel/common/block/smm/smihandler.c
index 7821dbaddc..9a4ee7cf96 100644
--- a/src/soc/intel/common/block/smm/smihandler.c
+++ b/src/soc/intel/common/block/smm/smihandler.c
@@ -21,6 +21,7 @@
#include <cpu/x86/smm.h>
#include <device/pci_def.h>
#include <elog.h>
+#include <intelblocks/fast_spi.h>
#include <intelblocks/pmclib.h>
#include <intelblocks/smihandler.h>
#include <intelblocks/uart.h>
@@ -35,11 +36,28 @@
/* GNVS needs to be set by coreboot initiating a software SMI. */
static struct global_nvs_t *gnvs;
+/* SoC overrides. */
+
__attribute__((weak)) int smihandler_disable_busmaster(device_t dev)
{
return 1;
}
+/* SMI handlers that should be serviced in SCI mode too. */
+__attribute__((weak)) uint32_t smi_handler_get_sci_mask(void)
+{
+ return 0; /* No valid SCI mask for SMI handler */
+}
+
+/*
+ * Needs to implement the mechanism to know if an illegal attempt
+ * has been made to write to the BIOS area.
+ */
+__attribute__((weak)) void smihandler_check_illegal_access(uint32_t tco_sts)
+{
+ return;
+}
+
static void *find_save_state(const struct smm_save_state_ops *save_state_ops,
int cmd)
{
@@ -175,6 +193,8 @@ void smihandler_southbridge_sleep(
/* Disable all GPE */
pmc_disable_all_gpe();
+ /* Set which state system will be after power reapplied */
+ pmc_soc_restore_power_failure();
/* also iterates over all bridges on bus 0 */
busmaster_disable_on_bus(0);
break;
@@ -201,8 +221,7 @@ void smihandler_southbridge_sleep(
* the line above. However, if we entered sleep state S1 and wake
* up again, we will continue to execute code in this function.
*/
- reg32 = inl(ACPI_BASE_ADDRESS + PM1_CNT);
- if (reg32 & SCI_EN) {
+ if (pmc_read_pm1_control() & SCI_EN) {
/* The OS is not an ACPI OS, so we set the state to S0 */
pmc_disable_pm1_control(SLP_EN | SLP_TYP);
}
@@ -240,6 +259,9 @@ static void finalize(void)
}
finalize_done = 1;
+ if (IS_ENABLED(CONFIG_SPI_FLASH_SMM))
+ /* Re-init SPI driver to handle locked BAR */
+ fast_spi_init();
}
void smihandler_southbridge_apmc(
@@ -308,12 +330,13 @@ void smihandler_southbridge_pm1(
const struct smm_save_state_ops *save_state_ops)
{
uint16_t pm1_sts = pmc_clear_pm1_status();
+ u16 pm1_en = pmc_read_pm1_enable();
/*
* While OSPM is not active, poweroff immediately
* on a power button event.
*/
- if (pm1_sts & PWRBTN_STS) {
+ if ((pm1_sts & PWRBTN_STS) && (pm1_en & PWRBTN_EN)) {
/* power button pressed */
if (IS_ENABLED(CONFIG_ELOG_GSMI))
elog_add_event(ELOG_TYPE_POWER_BUTTON);
@@ -337,6 +360,8 @@ void smihandler_southbridge_tco(
if (!tco_sts)
return;
+ smihandler_check_illegal_access(tco_sts);
+
if (tco_sts & TCO_TIMEOUT) { /* TIMEOUT */
/* Handle TCO timeout */
printk(BIOS_DEBUG, "TCO Timeout.\n");
@@ -391,6 +416,17 @@ void southbridge_smi_handler(void)
*/
smi_sts = pmc_clear_smi_status();
+ /*
+ * In SCI mode, execute only those SMI handlers that have
+ * declared themselves as available for service in that mode
+ * using smi_handler_get_sci_mask.
+ */
+ if (pmc_read_pm1_control() & SCI_EN)
+ smi_sts &= smi_handler_get_sci_mask();
+
+ if (!smi_sts)
+ return;
+
save_state_ops = get_smm_save_state_ops();
/* Call SMI sub handler for each of the status bits */
diff --git a/src/soc/intel/common/block/smm/smm.c b/src/soc/intel/common/block/smm/smm.c
index d5f42a76e6..e8c52459a1 100644
--- a/src/soc/intel/common/block/smm/smm.c
+++ b/src/soc/intel/common/block/smm/smm.c
@@ -38,11 +38,11 @@ void smm_southbridge_clear_state(void)
pmc_clear_all_gpe_status();
}
-void smm_southbridge_enable(void)
+void smm_southbridge_enable(uint16_t pm1_events)
{
printk(BIOS_DEBUG, "Enabling SMIs.\n");
/* Configure events */
- pmc_enable_pm1(PWRBTN_EN | GBL_EN);
+ pmc_enable_pm1(pm1_events);
pmc_disable_std_gpe(PME_B0_EN);
/*