ACPI: Add acpi_reset_gnvs_for_wake()

With chipset_power_state filled in romstage CBMEM hooks and
GNVS allocated early in ramstage, GNVS wake source is now
also filled for normal boot path.

Change-Id: I2d44770392d14d2d6e22cc98df9d1751c8717ff3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50004
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/acpi/gnvs.c

@@ -92,3 +92,16 @@ void acpi_fill_gnvs(void)
 		acpigen_pop_len();
 	}
 }
+
+int acpi_reset_gnvs_for_wake(struct global_nvs **gnvs_)
+{
+	if (!gnvs)
+		return -1;
+
+	/* Set unknown wake source */
+	gnvs->pm1i = -1;
+	gnvs->gpei = -1;
+
+	*gnvs_ = gnvs;
+	return 0;
+}

src/include/acpi/acpi_gnvs.h

@@ -5,12 +5,16 @@
 
 #include <types.h>
 
+struct global_nvs;
+
 void acpi_create_gnvs(void);
 #if CONFIG(ACPI_SOC_NVS)
 void *acpi_get_gnvs(void);
 void *acpi_get_device_nvs(void);
+int acpi_reset_gnvs_for_wake(struct global_nvs **gnvs);
 #else
 static inline void *acpi_get_gnvs(void) { return NULL; }
+static inline int acpi_reset_gnvs_for_wake(struct global_nvs **gnvs) { return -1; }
 #endif
 
 void gnvs_assign_chromeos(void *gnvs_section);
@@ -21,7 +25,6 @@ void gnvs_set_ecfw_rw(void);
  * Defined as weak in common acpi as gnvs structure definition is
  * chipset specific.
  */
-struct global_nvs;
 void soc_fill_gnvs(struct global_nvs *gnvs);
 void mainboard_fill_gnvs(struct global_nvs *gnvs);
 

src/soc/amd/common/block/acpi/pm_state.c

@@ -35,29 +35,25 @@ static void pm_fill_gnvs(struct global_nvs *gnvs, const struct acpi_pm_gpe_state
 	int index;
 
 	index = get_index_bit(state->pm1_sts & state->pm1_en, PM1_LIMIT);
-	if (index < 0)
-		gnvs->pm1i = ~0ULL;
-	else
+	if (index >= 0)
 		gnvs->pm1i = index;
 
 	index = get_index_bit(state->gpe0_sts & state->gpe0_en, GPE0_LIMIT);
-	if (index < 0)
-		gnvs->gpei = ~0ULL;
-	else
+	if (index >= 0)
 		gnvs->gpei = index;
 }
 
 static void acpi_save_wake_source(void *unused)
 {
 	const struct chipset_power_state *ps;
-	struct global_nvs *gnvs = acpi_get_gnvs();
-	if (!gnvs)
-		return;
+	struct global_nvs *gnvs;
 
+	if (acpi_reset_gnvs_for_wake(&gnvs) < 0)
+		return;
 	if (acpi_pm_state_for_wake(&ps) < 0)
 		return;
 
 	pm_fill_gnvs(gnvs, &ps->gpe_state);
 }
 
-BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, acpi_save_wake_source, NULL);
+BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL);

src/soc/amd/picasso/acpi.c

@@ -7,7 +7,6 @@
 #include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
-#include <acpi/acpi_gnvs.h>
 #include <acpi/acpigen.h>
 #include <device/pci_ops.h>
 #include <arch/ioapic.h>
@@ -26,7 +25,6 @@
 #include <soc/pci_devs.h>
 #include <soc/msr.h>
 #include <soc/southbridge.h>
-#include <soc/nvs.h>
 #include <soc/gpio.h>
 #include <version.h>
 #include "chip.h"
@@ -366,13 +364,6 @@ void generate_cpu_entries(const struct device *device)
 	acpigen_pop_len();
 }
 
-void soc_fill_gnvs(struct global_nvs *gnvs)
-{
-	/* Set unknown wake source */
-	gnvs->pm1i = ~0ULL;
-	gnvs->gpei = ~0ULL;
-}
-
 static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num)
 {
 	if (gpio_num >= SOC_GPIO_TOTAL_PINS) {

src/soc/amd/stoneyridge/acpi.c

@@ -7,7 +7,6 @@
 #include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
-#include <acpi/acpi_gnvs.h>
 #include <acpi/acpigen.h>
 #include <device/pci_ops.h>
 #include <arch/ioapic.h>
@@ -21,7 +20,6 @@
 #include <soc/pci_devs.h>
 #include <soc/southbridge.h>
 #include <soc/northbridge.h>
-#include <soc/nvs.h>
 #include <soc/gpio.h>
 #include <version.h>
 
@@ -159,13 +157,6 @@ void generate_cpu_entries(const struct device *device)
 	acpigen_pop_len();
 }
 
-void soc_fill_gnvs(struct global_nvs *gnvs)
-{
-	/* Set unknown wake source */
-	gnvs->pm1i = ~0ULL;
-	gnvs->gpei = ~0ULL;
-}
-
 static void acpigen_soc_get_gpio_in_local5(uintptr_t addr)
 {
 	/*

src/soc/intel/alderlake/acpi.c

@@ -271,9 +271,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	config_t *config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;
 

src/soc/intel/apollolake/acpi.c

@@ -76,9 +76,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 	struct soc_intel_apollolake_config *cfg;
 	cfg = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = ~0ULL;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = cfg->dptf_enable;
 

src/soc/intel/baytrail/acpi.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <acpi/acpi.h>
-#include <acpi/acpi_gnvs.h>
 #include <acpi/acpigen.h>
 #include <arch/ioapic.h>
 #include <device/mmio.h>
@@ -16,7 +15,6 @@
 #include <soc/iomap.h>
 #include <soc/irq.h>
 #include <soc/msr.h>
-#include <soc/nvs.h>
 #include <soc/pattrs.h>
 #include <soc/pm.h>
 
@@ -55,12 +53,6 @@ static acpi_cstate_t cstate_map[] = {
 	}
 };
 
-void soc_fill_gnvs(struct global_nvs *gnvs)
-{
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-}
-
 int acpi_sci_irq(void)
 {
 	u32 *actl = (u32 *)(ILB_BASE_ADDRESS + ACTL);

src/soc/intel/baytrail/ramstage.c

@@ -121,37 +121,38 @@ static void fill_in_pattrs(void)
 static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_state *ps)
 {
 	uint16_t pm1;
+	int index;
+
 	pm1 = ps->pm1_sts & ps->pm1_en;
 
 	/* Scan for first set bit in PM1 */
-	for (gnvs->pm1i = 0; gnvs->pm1i < 16; gnvs->pm1i++) {
+	for (index = 0; index < 16; index++) {
 		if (pm1 & 1)
 			break;
 		pm1 >>= 1;
 	}
 
-	/* If unable to determine then return -1 */
-	if (gnvs->pm1i >= 16)
-		gnvs->pm1i = -1;
-
-	printk(BIOS_DEBUG, "ACPI System Wake Source is PM1 Index %d\n",
-	       gnvs->pm1i);
+	if (index < 16)
+		gnvs->pm1i = index;
 }
 
 static void acpi_save_wake_source(void *unused)
 {
 	const struct chipset_power_state *ps;
-	struct global_nvs *gnvs = acpi_get_gnvs();
-	if (!gnvs)
-		return;
+	struct global_nvs *gnvs;
 
+	if (acpi_reset_gnvs_for_wake(&gnvs) < 0)
+		return;
 	if (acpi_pm_state_for_wake(&ps) < 0)
 		return;
 
 	pm_fill_gnvs(gnvs, ps);
+
+	printk(BIOS_DEBUG, "ACPI System Wake Source is PM1 Index %d\n",
+	       gnvs->pm1i);
 }
 
-BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, acpi_save_wake_source, NULL);
+BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL);
 
 static void baytrail_enable_2x_refresh_rate(void)
 {

src/soc/intel/braswell/acpi.c

@@ -61,9 +61,6 @@ static acpi_cstate_t cstate_map[] = {
 
 void soc_fill_gnvs(struct global_nvs *gnvs)
 {
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Fill in the Wi-Fi Region ID */
 	if (CONFIG(HAVE_REGULATORY_DOMAIN))
 		gnvs->cid1 = wifi_regulatory_domain();

src/soc/intel/broadwell/pch/lpc.c

@@ -10,13 +10,11 @@
 #include <device/pci_ops.h>
 #include <arch/ioapic.h>
 #include <acpi/acpi.h>
-#include <acpi/acpi_gnvs.h>
 #include <cpu/x86/smm.h>
 #include <string.h>
 #include <soc/iobp.h>
 #include <soc/iomap.h>
 #include <soc/lpc.h>
-#include <soc/nvs.h>
 #include <soc/pch.h>
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
@@ -603,12 +601,6 @@ static void pch_lpc_read_resources(struct device *dev)
 	pch_lpc_add_io_resources(dev);
 }
 
-void soc_fill_gnvs(struct global_nvs *gnvs)
-{
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-}
-
 static unsigned long broadwell_write_acpi_tables(const struct device *device,
 						 unsigned long current,
 						 struct acpi_rsdp *rsdp)

src/soc/intel/broadwell/pch/ramstage.c

@@ -15,60 +15,51 @@
 static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_state *ps)
 {
 	uint16_t pm1;
-	int gpe_reg;
+	int gpe_reg, index;
 
 	pm1 = ps->pm1_sts & ps->pm1_en;
 
 	/* Scan for first set bit in PM1 */
-	for (gnvs->pm1i = 0; gnvs->pm1i < 16; gnvs->pm1i++) {
+	for (index = 0; index < 16; index++) {
 		if (pm1 & 1)
 			break;
 		pm1 >>= 1;
 	}
 
-	/* If unable to determine then return -1 */
-	if (gnvs->pm1i >= 16)
-		gnvs->pm1i = -1;
+	if (index < 16)
+		gnvs->pm1i = index;
 
 	/* Scan for first set bit in GPE registers */
-	gnvs->gpei = -1;
 	for (gpe_reg = 0; gpe_reg < GPE0_REG_MAX; gpe_reg++) {
 		u32 gpe = ps->gpe0_sts[gpe_reg] & ps->gpe0_en[gpe_reg];
 		int start = gpe_reg * GPE0_REG_SIZE;
 		int end = start + GPE0_REG_SIZE;
 
-		if (gpe == 0) {
-			if (!gnvs->gpei)
-				gnvs->gpei = end;
-			continue;
-		}
-
-		for (gnvs->gpei = start; gnvs->gpei < end; gnvs->gpei++) {
+		for (index = start; index < end; index++) {
 			if (gpe & 1)
 				break;
 			gpe >>= 1;
 		}
 	}
 
-	/* If unable to determine then return -1 */
-	if (gnvs->gpei >= (GPE0_REG_MAX * GPE0_REG_SIZE))
-		gnvs->gpei = -1;
-
-	printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n",
-	       gnvs->pm1i, gnvs->gpei);
+	if (index < GPE0_REG_MAX * GPE0_REG_SIZE)
+		gnvs->gpei = index;
 }
 
 static void acpi_save_wake_source(void *unused)
 {
 	const struct chipset_power_state *ps;
-	struct global_nvs *gnvs = acpi_get_gnvs();
-	if (!gnvs)
-		return;
+	struct global_nvs *gnvs;
 
+	if (acpi_reset_gnvs_for_wake(&gnvs) < 0)
+		return;
 	if (acpi_pm_state_for_wake(&ps) < 0)
 		return;
 
 	pm_fill_gnvs(gnvs, ps);
+
+	printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n",
+	       gnvs->pm1i, gnvs->gpei);
 }
 
-BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, acpi_save_wake_source, NULL);
+BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL);

src/soc/intel/cannonlake/acpi.c

@@ -175,9 +175,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 	const struct soc_intel_cannonlake_config *config;
 	config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;
 

src/soc/intel/common/block/acpi/acpi_wake_source.c

@@ -14,7 +14,7 @@
 static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_state *ps)
 {
 	uint32_t pm1, *gpe0;
-	int gpe_reg, gpe_reg_count;
+	int index, gpe_reg, gpe_reg_count;
 	int reg_size = sizeof(uint32_t) * 8;
 
 	gpe_reg_count = soc_fill_acpi_wake(ps, &pm1, &gpe0);
@@ -22,15 +22,14 @@ static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_sta
 		return;
 
 	/* Scan for first set bit in PM1 */
-	for (gnvs->pm1i = 0; gnvs->pm1i < reg_size; gnvs->pm1i++) {
+	for (index = 0; index < reg_size; index++) {
 		if (pm1 & 1)
 			break;
 		pm1 >>= 1;
 	}
 
-	/* If unable to determine then return -1 */
-	if (gnvs->pm1i >= 16)
-		gnvs->pm1i = -1;
+	if (index < 16)
+		gnvs->pm1i = index;
 
 	/* Scan for first set bit in GPE registers */
 	for (gpe_reg = 0; gpe_reg < gpe_reg_count; gpe_reg++) {
@@ -38,41 +37,31 @@ static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_sta
 		int start = gpe_reg * reg_size;
 		int end = start + reg_size;
 
-		if (gpe == 0) {
-			if (!gnvs->gpei)
-				gnvs->gpei = end;
-			continue;
-		}
-
-		for (gnvs->gpei = start; gnvs->gpei < end; gnvs->gpei++) {
+		for (index = start; index < end; index++) {
 			if (gpe & 1)
 				break;
 			gpe >>= 1;
 		}
 	}
 
-	/* If unable to determine then return -1 */
-	if (gnvs->gpei >= gpe_reg_count * reg_size)
-		gnvs->gpei = -1;
-
-	printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n",
-	       (long long)gnvs->pm1i, (long long)gnvs->gpei);
+	if (index < gpe_reg_count * reg_size)
+		gnvs->gpei = index;
 }
 
 static void acpi_save_wake_source(void *unused)
 {
 	const struct chipset_power_state *ps;
-	struct global_nvs *gnvs = acpi_get_gnvs();
-	if (!gnvs)
+	struct global_nvs *gnvs;
+
+	if (acpi_reset_gnvs_for_wake(&gnvs) < 0)
 		return;
-
-	gnvs->pm1i = -1;
-	gnvs->gpei = -1;
-
 	if (acpi_pm_state_for_wake(&ps) < 0)
 		return;
 
 	pm_fill_gnvs(gnvs, ps);
+
+	printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n",
+	       (long long)gnvs->pm1i, (long long)gnvs->gpei);
 }
 
-BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, acpi_save_wake_source, NULL);
+BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL);

src/soc/intel/elkhartlake/acpi.c

@@ -239,9 +239,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	config_t *config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;
 

src/soc/intel/icelake/acpi.c

@@ -170,9 +170,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	config_t *config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;
 

src/soc/intel/jasperlake/acpi.c

@@ -266,9 +266,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	config_t *config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;
 

src/soc/intel/skylake/acpi.c

@@ -159,9 +159,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	const struct soc_intel_skylake_config *config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;
 

src/soc/intel/tigerlake/acpi.c

@@ -266,9 +266,6 @@ void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	config_t *config = config_of_soc();
 
-	/* Set unknown wake source */
-	gnvs->pm1i = -1;
-
 	/* Enable DPTF based on mainboard configuration */
 	gnvs->dpte = config->dptf_enable;