[coreboot-gerrit] Patch set updated for coreboot: intel: Fix S3 handoff state to ramstage

Kyösti Mälkki (kyosti.malkki@gmail.com) gerrit at coreboot.org
Thu Nov 10 15:59:30 CET 2016


Kyösti Mälkki (kyosti.malkki at gmail.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/8172

-gerrit

commit bb599176119e7daad8b6fb52ac0220c9a9e23306
Author: Kyösti Mälkki <kyosti.malkki at gmail.com>
Date:   Sat Jun 25 11:40:00 2016 +0300

    intel: Fix S3 handoff state to ramstage
    
    Don't use scratchpad registers when we have romstage_handoff
    to pass S3 resume flag.
    
    Change-Id: I0f074bb80f06f6f0ddf4212cd8872e94ae57f949
    Signed-off-by: Kyösti Mälkki <kyosti.malkki at gmail.com>
---
 src/mainboard/lenovo/t400/romstage.c            | 22 ++++++++--------------
 src/mainboard/lenovo/t60/mainboard.c            |  7 +++----
 src/mainboard/lenovo/x200/romstage.c            | 22 ++++++++--------------
 src/mainboard/lenovo/x201/mainboard.c           |  5 ++---
 src/mainboard/lenovo/x201/romstage.c            | 20 ++++++++------------
 src/mainboard/lenovo/x60/mainboard.c            |  7 +++----
 src/mainboard/packardbell/ms2290/romstage.c     | 20 +++++++-------------
 src/mainboard/roda/rk9/romstage.c               | 22 ++++++++--------------
 src/northbridge/intel/gm45/northbridge.c        | 17 -----------------
 src/northbridge/intel/i945/early_init.c         | 20 +++++++++++---------
 src/northbridge/intel/i945/northbridge.c        | 23 -----------------------
 src/northbridge/intel/nehalem/nehalem.h         |  4 ----
 src/northbridge/intel/nehalem/northbridge.c     | 21 ---------------------
 src/northbridge/intel/sandybridge/early_init.c  | 21 ++++++++-------------
 src/northbridge/intel/sandybridge/northbridge.c | 21 ---------------------
 src/southbridge/intel/i82801gx/i82801gx.h       |  2 --
 src/southbridge/intel/i82801gx/smi.c            | 13 ++-----------
 src/southbridge/intel/i82801ix/i82801ix.h       |  4 ----
 src/southbridge/intel/i82801ix/smi.c            | 13 ++-----------
 19 files changed, 70 insertions(+), 214 deletions(-)

diff --git a/src/mainboard/lenovo/t400/romstage.c b/src/mainboard/lenovo/t400/romstage.c
index 821b87f..546bc77 100644
--- a/src/mainboard/lenovo/t400/romstage.c
+++ b/src/mainboard/lenovo/t400/romstage.c
@@ -27,6 +27,7 @@
 #include <cbmem.h>
 #include <lib.h>
 #include <pc80/mc146818rtc.h>
+#include <romstage_handoff.h>
 #include <console/console.h>
 #include <southbridge/intel/i82801ix/i82801ix.h>
 #include <northbridge/intel/gm45/gm45.h>
@@ -55,6 +56,7 @@ void mainboard_romstage_entry(unsigned long bist)
 	int s3resume = 0;
 	int cbmem_initted;
 	u16 reg16;
+	struct romstage_handoff *handoff;
 
 	/* basic northbridge setup, including MMCONF BAR */
 	gm45_early_init();
@@ -156,18 +158,10 @@ void mainboard_romstage_entry(unsigned long bist)
 	outl(inl(DEFAULT_GPIOBASE + 0x38) & ~0x400, DEFAULT_GPIOBASE + 0x38);
 
 	cbmem_initted = !cbmem_recovery(s3resume);
-#if CONFIG_HAVE_ACPI_RESUME
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
-	if (s3resume && cbmem_initted) {
-
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0, 0), D0F0_SKPD, SKPAD_ACPI_S3_MAGIC);
-	} else {
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0, 0), D0F0_SKPD, SKPAD_NORMAL_BOOT_MAGIC);
-	}
-#endif
-	printk(BIOS_SPEW, "exit main()\n");
+
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 }
diff --git a/src/mainboard/lenovo/t60/mainboard.c b/src/mainboard/lenovo/t60/mainboard.c
index 44fa402..d8256d2 100644
--- a/src/mainboard/lenovo/t60/mainboard.c
+++ b/src/mainboard/lenovo/t60/mainboard.c
@@ -17,12 +17,12 @@
 
 #include <console/console.h>
 #include <device/device.h>
+#include <arch/acpi.h>
 #include <arch/io.h>
 #include <delay.h>
 #include <string.h>
 #include <device/pci_def.h>
 #include <device/pci_ops.h>
-#include <arch/io.h>
 #include <ec/lenovo/pmh7/pmh7.h>
 #include <ec/acpi/ec.h>
 #include <ec/lenovo/h8/h8.h>
@@ -49,13 +49,12 @@ int get_cst_entries(acpi_cstate_t **entries)
 static void mainboard_init(device_t dev)
 {
 	struct southbridge_intel_i82801gx_config *config;
-	device_t dev0, idedev;
+	device_t idedev;
 
 	install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_INT_LVDS, GMA_INT15_PANEL_FIT_DEFAULT, PANEL, 3);
 
 	/* If we're resuming from suspend, blink suspend LED */
-	dev0 = dev_find_slot(0, PCI_DEVFN(0,0));
-	if (dev0 && pci_read_config32(dev0, SKPAD) == SKPAD_ACPI_S3_MAGIC)
+	if (acpi_is_wakeup_s3())
 		ec_write(0x0c, 0xc7);
 
 	idedev = dev_find_slot(0, PCI_DEVFN(0x1f,1));
diff --git a/src/mainboard/lenovo/x200/romstage.c b/src/mainboard/lenovo/x200/romstage.c
index 8c97ae1..6af4dea 100644
--- a/src/mainboard/lenovo/x200/romstage.c
+++ b/src/mainboard/lenovo/x200/romstage.c
@@ -27,6 +27,7 @@
 #include <cbmem.h>
 #include <lib.h>
 #include <pc80/mc146818rtc.h>
+#include <romstage_handoff.h>
 #include <console/console.h>
 #include <southbridge/intel/i82801ix/i82801ix.h>
 #include <northbridge/intel/gm45/gm45.h>
@@ -56,6 +57,7 @@ void mainboard_romstage_entry(unsigned long bist)
 	int s3resume = 0;
 	int cbmem_initted;
 	u16 reg16;
+	struct romstage_handoff *handoff;
 
 	/* basic northbridge setup, including MMCONF BAR */
 	gm45_early_init();
@@ -157,18 +159,10 @@ void mainboard_romstage_entry(unsigned long bist)
 	outl(inl(DEFAULT_GPIOBASE + 0x38) & ~0x400, DEFAULT_GPIOBASE + 0x38);
 
 	cbmem_initted = !cbmem_recovery(s3resume);
-#if CONFIG_HAVE_ACPI_RESUME
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
-	if (s3resume && cbmem_initted) {
-
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0, 0), D0F0_SKPD, SKPAD_ACPI_S3_MAGIC);
-	} else {
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0, 0), D0F0_SKPD, SKPAD_NORMAL_BOOT_MAGIC);
-	}
-#endif
-	printk(BIOS_SPEW, "exit main()\n");
+
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 }
diff --git a/src/mainboard/lenovo/x201/mainboard.c b/src/mainboard/lenovo/x201/mainboard.c
index 2f35c81..6c5f9c9 100644
--- a/src/mainboard/lenovo/x201/mainboard.c
+++ b/src/mainboard/lenovo/x201/mainboard.c
@@ -18,6 +18,7 @@
 
 #include <console/console.h>
 #include <device/device.h>
+#include <arch/acpi.h>
 #include <arch/io.h>
 #include <delay.h>
 #include <string.h>
@@ -90,7 +91,6 @@ static void fill_ssdt(device_t device)
 
 static void mainboard_enable(device_t dev)
 {
-	device_t dev0;
 	u16 pmbase;
 
 	dev->ops->init = mainboard_init;
@@ -110,8 +110,7 @@ static void mainboard_enable(device_t dev)
 			  0x10);
 
 	/* If we're resuming from suspend, blink suspend LED */
-	dev0 = dev_find_slot(0, PCI_DEVFN(0, 0));
-	if (dev0 && pci_read_config32(dev0, SKPAD) == SKPAD_ACPI_S3_MAGIC)
+	if (acpi_is_wakeup_s3())
 		ec_write(0x0c, 0xc7);
 
 	install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_INT_LVDS, GMA_INT15_PANEL_FIT_DEFAULT, GMA_INT15_BOOT_DISPLAY_LFP, 2);
diff --git a/src/mainboard/lenovo/x201/romstage.c b/src/mainboard/lenovo/x201/romstage.c
index 7b8d7f9..961925c 100644
--- a/src/mainboard/lenovo/x201/romstage.c
+++ b/src/mainboard/lenovo/x201/romstage.c
@@ -180,6 +180,7 @@ void mainboard_romstage_entry(unsigned long bist)
 	u32 reg32;
 	int s3resume = 0;
 	const u8 spd_addrmap[4] = { 0x50, 0, 0x51, 0 };
+	struct romstage_handoff *handoff;
 
 	timestamp_init(timestamp_get());
 
@@ -277,19 +278,14 @@ void mainboard_romstage_entry(unsigned long bist)
 		outl(reg32 & ~(7 << 10), DEFAULT_PMBASE + 0x04);
 	}
 
-#if CONFIG_HAVE_ACPI_RESUME
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
-	if (s3resume) {
+	quick_ram_check();
+
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
-	} else {
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafebabe);
-		quick_ram_check();
-	}
-#endif
 
 #if CONFIG_LPC_TPM
 	init_tpm(s3resume);
diff --git a/src/mainboard/lenovo/x60/mainboard.c b/src/mainboard/lenovo/x60/mainboard.c
index b1096d2..6661a5f 100644
--- a/src/mainboard/lenovo/x60/mainboard.c
+++ b/src/mainboard/lenovo/x60/mainboard.c
@@ -17,13 +17,13 @@
 
 #include <console/console.h>
 #include <device/device.h>
+#include <arch/acpi.h>
 #include <arch/io.h>
 #include <delay.h>
 #include <string.h>
 #include <device/pci_def.h>
 #include <device/pci_ops.h>
 #include <device/pci_ids.h>
-#include <arch/io.h>
 #include <arch/interrupt.h>
 #include <ec/lenovo/pmh7/pmh7.h>
 #include <ec/acpi/ec.h>
@@ -79,7 +79,7 @@ int get_cst_entries(acpi_cstate_t **entries)
 
 static void mainboard_init(device_t dev)
 {
-	device_t dev0, idedev, sdhci_dev;
+	device_t idedev, sdhci_dev;
 
 	ec_clr_bit(0x03, 2);
 
@@ -91,8 +91,7 @@ static void mainboard_init(device_t dev)
 	install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_INT_LVDS, GMA_INT15_PANEL_FIT_DEFAULT, PANEL, 3);
 
 	/* If we're resuming from suspend, blink suspend LED */
-	dev0 = dev_find_slot(0, PCI_DEVFN(0,0));
-	if (dev0 && pci_read_config32(dev0, SKPAD) == SKPAD_ACPI_S3_MAGIC)
+	if (acpi_is_wakeup_s3())
 		ec_write(0x0c, 0xc7);
 
 	idedev = dev_find_slot(0, PCI_DEVFN(0x1f,1));
diff --git a/src/mainboard/packardbell/ms2290/romstage.c b/src/mainboard/packardbell/ms2290/romstage.c
index 04c9513..af45095 100644
--- a/src/mainboard/packardbell/ms2290/romstage.c
+++ b/src/mainboard/packardbell/ms2290/romstage.c
@@ -26,6 +26,7 @@
 #include <cpu/x86/lapic.h>
 #include <lib.h>
 #include <pc80/mc146818rtc.h>
+#include <romstage_handoff.h>
 #include <console/console.h>
 #include <cpu/x86/bist.h>
 #include <cpu/intel/romstage.h>
@@ -171,6 +172,7 @@ void mainboard_romstage_entry(unsigned long bist)
 	u32 reg32;
 	int s3resume = 0;
 	const u8 spd_addrmap[4] = { 0x50, 0, 0x52, 0 };
+	struct romstage_handoff *handoff;
 
 	timestamp_init(timestamp_get());
 
@@ -267,17 +269,9 @@ void mainboard_romstage_entry(unsigned long bist)
 		outl(reg32 & ~(7 << 10), DEFAULT_PMBASE + 0x04);
 	}
 
-#if CONFIG_HAVE_ACPI_RESUME
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
-	if (s3resume) {
-
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
-	} else {
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafebabe);
-		quick_ram_check();
-	}
-#endif
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 }
diff --git a/src/mainboard/roda/rk9/romstage.c b/src/mainboard/roda/rk9/romstage.c
index b7ef1bb..a5b9188 100644
--- a/src/mainboard/roda/rk9/romstage.c
+++ b/src/mainboard/roda/rk9/romstage.c
@@ -27,6 +27,7 @@
 #include <cbmem.h>
 #include <lib.h>
 #include <pc80/mc146818rtc.h>
+#include <romstage_handoff.h>
 #include <console/console.h>
 #include <southbridge/intel/i82801ix/i82801ix.h>
 #include <northbridge/intel/gm45/gm45.h>
@@ -122,6 +123,7 @@ void mainboard_romstage_entry(unsigned long bist)
 	int s3resume = 0;
 	int cbmem_initted;
 	u16 reg16;
+	struct romstage_handoff *handoff;
 
 	/* basic northbridge setup, including MMCONF BAR */
 	gm45_early_init();
@@ -187,18 +189,10 @@ void mainboard_romstage_entry(unsigned long bist)
 	init_iommu();
 
 	cbmem_initted = !cbmem_recovery(s3resume);
-#if CONFIG_HAVE_ACPI_RESUME
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
-	if (s3resume && cbmem_initted) {
-
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0, 0), D0F0_SKPD, SKPAD_ACPI_S3_MAGIC);
-	} else {
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0, 0), D0F0_SKPD, SKPAD_NORMAL_BOOT_MAGIC);
-	}
-#endif
-	printk(BIOS_SPEW, "exit main()\n");
+
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 }
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c
index aaa6749..af62f12 100644
--- a/src/northbridge/intel/gm45/northbridge.c
+++ b/src/northbridge/intel/gm45/northbridge.c
@@ -216,28 +216,11 @@ static struct device_operations cpu_bus_ops = {
 	.scan_bus         = 0,
 };
 
-
 static void enable_dev(device_t dev)
 {
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_DOMAIN) {
 		dev->ops = &pci_domain_ops;
-#if CONFIG_HAVE_ACPI_RESUME
-		switch (pci_read_config32(dev_find_slot(0, PCI_DEVFN(0, 0)), /*D0F0_SKPD*/0xdc)) {
-		case SKPAD_NORMAL_BOOT_MAGIC:
-			printk(BIOS_DEBUG, "Normal boot.\n");
-			acpi_slp_type = 0;
-			break;
-		case SKPAD_ACPI_S3_MAGIC:
-			printk(BIOS_DEBUG, "S3 Resume.\n");
-			acpi_slp_type = 3;
-			break;
-		default:
-			printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
-			acpi_slp_type = 0;
-			break;
-		}
-#endif
 	} else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) {
 		dev->ops = &cpu_bus_ops;
 	}
diff --git a/src/northbridge/intel/i945/early_init.c b/src/northbridge/intel/i945/early_init.c
index 9523333..0ef2a4e 100644
--- a/src/northbridge/intel/i945/early_init.c
+++ b/src/northbridge/intel/i945/early_init.c
@@ -21,6 +21,7 @@
 #include <device/pci_def.h>
 #include <cbmem.h>
 #include <halt.h>
+#include <romstage_handoff.h>
 #include <string.h>
 #include "i945.h"
 #include <pc80/mc146818rtc.h>
@@ -197,7 +198,6 @@ static void i945_setup_bars(void)
 	pci_write_config8(PCI_DEV(0, 0x00, 0), PAM5, 0x33);
 	pci_write_config8(PCI_DEV(0, 0x00, 0), PAM6, 0x33);
 
-	pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, SKPAD_NORMAL_BOOT_MAGIC);
 	printk(BIOS_DEBUG, " done.\n");
 
 	/* Wait for MCH BAR to come up */
@@ -898,18 +898,20 @@ void i945_early_initialization(void)
 static void i945_prepare_resume(int s3resume)
 {
 	int cbmem_was_initted;
+	struct romstage_handoff *handoff;
 
 	cbmem_was_initted = !cbmem_recovery(s3resume);
 
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
-	if (s3resume && cbmem_was_initted) {
-
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD,
-				   SKPAD_ACPI_S3_MAGIC);
+	if (s3resume && !acpi_s3_resume_allowed()) {
+		printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n");
+		s3resume = 0;
 	}
+
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 }
 
 void i945_late_initialization(int s3resume)
diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c
index 5d18591..848bbaa 100644
--- a/src/northbridge/intel/i945/northbridge.c
+++ b/src/northbridge/intel/i945/northbridge.c
@@ -213,26 +213,6 @@ static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
 	}
 }
 
-#if CONFIG_HAVE_ACPI_RESUME
-static void northbridge_init(struct device *dev)
-{
-	switch (pci_read_config32(dev, SKPAD)) {
-	case SKPAD_NORMAL_BOOT_MAGIC:
-		printk(BIOS_DEBUG, "Normal boot.\n");
-		acpi_slp_type = 0;
-		break;
-	case SKPAD_ACPI_S3_MAGIC:
-		printk(BIOS_DEBUG, "S3 Resume.\n");
-		acpi_slp_type = 3;
-		break;
-	default:
-		printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
-		acpi_slp_type = 0;
-		break;
-	}
-}
-#endif
-
 static struct pci_operations intel_pci_ops = {
 	.set_subsystem    = intel_set_subsystem,
 };
@@ -242,9 +222,6 @@ static struct device_operations mc_ops = {
 	.set_resources    = mc_set_resources,
 	.enable_resources = pci_dev_enable_resources,
 	.acpi_fill_ssdt_generator = generate_cpu_entries,
-#if CONFIG_HAVE_ACPI_RESUME
-	.init             = northbridge_init,
-#endif
 	.scan_bus         = 0,
 	.ops_pci          = &intel_pci_ops,
 };
diff --git a/src/northbridge/intel/nehalem/nehalem.h b/src/northbridge/intel/nehalem/nehalem.h
index 381bfbd..ce399cc 100644
--- a/src/northbridge/intel/nehalem/nehalem.h
+++ b/src/northbridge/intel/nehalem/nehalem.h
@@ -222,10 +222,6 @@ enum {
 #define D0F0_TOLUD 0xb0
 #define D0F0_SKPD 0xdc /* Scratchpad Data */
 
-#define SKPAD_ACPI_S3_MAGIC	0xcafed00d
-#define SKPAD_NORMAL_BOOT_MAGIC	0xcafebabe
-
-
 #define D0F0_CAPID0 0xe0
 
 #define TSEG		0xac	/* TSEG base */
diff --git a/src/northbridge/intel/nehalem/northbridge.c b/src/northbridge/intel/nehalem/northbridge.c
index 06c0a96..3a24b71 100644
--- a/src/northbridge/intel/nehalem/northbridge.c
+++ b/src/northbridge/intel/nehalem/northbridge.c
@@ -287,26 +287,6 @@ static void northbridge_init(struct device *dev)
 	MCHBAR32(0x5500) = 0x00100001;
 }
 
-static void northbridge_enable(device_t dev)
-{
-#if CONFIG_HAVE_ACPI_RESUME
-	switch (pci_read_config32(dev, SKPAD)) {
-	case 0xcafebabe:
-		printk(BIOS_DEBUG, "Normal boot.\n");
-		acpi_slp_type = 0;
-		break;
-	case 0xcafed00d:
-		printk(BIOS_DEBUG, "S3 Resume.\n");
-		acpi_slp_type = 3;
-		break;
-	default:
-		printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
-		acpi_slp_type = 0;
-		break;
-	}
-#endif
-}
-
 static struct pci_operations intel_pci_ops = {
 	.set_subsystem = intel_set_subsystem,
 };
@@ -316,7 +296,6 @@ static struct device_operations mc_ops = {
 	.set_resources = mc_set_resources,
 	.enable_resources = pci_dev_enable_resources,
 	.init = northbridge_init,
-	.enable = northbridge_enable,
 	.acpi_fill_ssdt_generator = generate_cpu_entries,
 	.scan_bus = 0,
 	.ops_pci = &intel_pci_ops,
diff --git a/src/northbridge/intel/sandybridge/early_init.c b/src/northbridge/intel/sandybridge/early_init.c
index 86d1c00..ef97a1a 100644
--- a/src/northbridge/intel/sandybridge/early_init.c
+++ b/src/northbridge/intel/sandybridge/early_init.c
@@ -23,6 +23,7 @@
 #include <elog.h>
 #include <cbmem.h>
 #include <pc80/mc146818rtc.h>
+#include <romstage_handoff.h>
 #include "sandybridge.h"
 
 static void sandybridge_setup_bars(void)
@@ -226,19 +227,13 @@ void sandybridge_early_initialization(int chipset_type)
 
 void northbridge_romstage_finalize(int s3resume)
 {
-	MCHBAR16(SSKPD) = 0xCAFE;
-
-#if CONFIG_HAVE_ACPI_RESUME
-	/* If there is no high memory area, we didn't boot before, so
-	 * this is not a resume. In that case we just create the cbmem toc.
-	 */
+	struct romstage_handoff *handoff;
 
-	if (s3resume) {
+	MCHBAR16(SSKPD) = 0xCAFE;
 
-		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
-	} else {
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafebabe);
-	}
-#endif
+	handoff = romstage_handoff_find_or_add();
+	if (handoff != NULL)
+		handoff->s3_resume = s3resume;
+	else
+		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 }
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c
index a67b84d..fe1a07c 100644
--- a/src/northbridge/intel/sandybridge/northbridge.c
+++ b/src/northbridge/intel/sandybridge/northbridge.c
@@ -470,26 +470,6 @@ static void northbridge_init(struct device *dev)
 	MCHBAR32(0x5500) = 0x00100001;
 }
 
-static void northbridge_enable(device_t dev)
-{
-#if CONFIG_HAVE_ACPI_RESUME
-	switch (pci_read_config32(dev, SKPAD)) {
-	case 0xcafebabe:
-		printk(BIOS_DEBUG, "Normal boot.\n");
-		acpi_slp_type=0;
-		break;
-	case 0xcafed00d:
-		printk(BIOS_DEBUG, "S3 Resume.\n");
-		acpi_slp_type=3;
-		break;
-	default:
-		printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
-		acpi_slp_type=0;
-		break;
-	}
-#endif
-}
-
 static u32 northbridge_get_base_reg(device_t dev, int reg)
 {
 	u32 value;
@@ -521,7 +501,6 @@ static struct device_operations mc_ops = {
 	.set_resources    = mc_set_resources,
 	.enable_resources = pci_dev_enable_resources,
 	.init             = northbridge_init,
-	.enable           = northbridge_enable,
 	.scan_bus         = 0,
 	.ops_pci          = &intel_pci_ops,
 	.acpi_fill_ssdt_generator = generate_cpu_entries,
diff --git a/src/southbridge/intel/i82801gx/i82801gx.h b/src/southbridge/intel/i82801gx/i82801gx.h
index 7e8b988..d1441e8 100644
--- a/src/southbridge/intel/i82801gx/i82801gx.h
+++ b/src/southbridge/intel/i82801gx/i82801gx.h
@@ -375,7 +375,5 @@ int southbridge_detect_s3_resume(void);
 #define SS_CNT		0x50
 #define C3_RES		0x54
 
-#define SKPAD_ACPI_S3_MAGIC	0xcafed00d
-#define SKPAD_NORMAL_BOOT_MAGIC	0xcafebabe
 #endif /* __ACPI__ */
 #endif				/* SOUTHBRIDGE_INTEL_I82801GX_I82801GX_H */
diff --git a/src/southbridge/intel/i82801gx/smi.c b/src/southbridge/intel/i82801gx/smi.c
index 01fbbfb..b61e068 100644
--- a/src/southbridge/intel/i82801gx/smi.c
+++ b/src/southbridge/intel/i82801gx/smi.c
@@ -19,6 +19,7 @@
 #include <device/pci.h>
 #include <console/console.h>
 #include <arch/io.h>
+#include <arch/acpi.h>
 #include <cpu/cpu.h>
 #include <cpu/x86/cache.h>
 #include <cpu/x86/smm.h>
@@ -315,16 +316,6 @@ static void smm_relocate(void)
 
 static int smm_handler_copied = 0;
 
-static int is_wakeup(void)
-{
-	device_t dev0 = dev_find_slot(0, PCI_DEVFN(0,0));
-
-	if (!dev0)
-		return 0;
-
-	return pci_read_config32(dev0, 0xdc) == SKPAD_ACPI_S3_MAGIC;
-}
-
 static void smm_install(void)
 {
 	/* The first CPU running this gets to copy the SMM handler. But not all
@@ -338,7 +329,7 @@ static void smm_install(void)
 	/* if we're resuming from S3, the SMM code is already in place,
 	 * so don't copy it again to keep the current SMM state */
 
-	if (!is_wakeup()) {
+	if (!acpi_is_wakeup_s3()) {
 		/* enable the SMM memory window */
 		pci_write_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), SMRAM,
 					D_OPEN | G_SMRAME | C_BASE_SEG);
diff --git a/src/southbridge/intel/i82801ix/i82801ix.h b/src/southbridge/intel/i82801ix/i82801ix.h
index afe4aa7..af4efcd 100644
--- a/src/southbridge/intel/i82801ix/i82801ix.h
+++ b/src/southbridge/intel/i82801ix/i82801ix.h
@@ -218,10 +218,6 @@
 #define FD_SAD1		(1 <<  2) /* SATA #1 */
 
 
-#define SKPAD_ACPI_S3_MAGIC	0xcafed00d
-#define SKPAD_NORMAL_BOOT_MAGIC	0xcafebabe
-
-
 #ifndef __ACPI__
 #ifndef __ASSEMBLER__
 
diff --git a/src/southbridge/intel/i82801ix/smi.c b/src/southbridge/intel/i82801ix/smi.c
index dd0915a..34fbad4 100644
--- a/src/southbridge/intel/i82801ix/smi.c
+++ b/src/southbridge/intel/i82801ix/smi.c
@@ -20,6 +20,7 @@
 #include <device/pci.h>
 #include <console/console.h>
 #include <arch/io.h>
+#include <arch/acpi.h>
 #include <cpu/cpu.h>
 #include <cpu/x86/cache.h>
 #include <cpu/x86/smm.h>
@@ -314,16 +315,6 @@ static void smm_relocate(void)
 
 static int smm_handler_copied = 0;
 
-static int is_wakeup(void)
-{
-	device_t dev0 = dev_find_slot(0, PCI_DEVFN(0,0));
-
-	if (!dev0)
-		return 0;
-
-	return pci_read_config32(dev0, 0xdc) == SKPAD_ACPI_S3_MAGIC;
-}
-
 static void smm_install(void)
 {
 	/* The first CPU running this gets to copy the SMM handler. But not all
@@ -337,7 +328,7 @@ static void smm_install(void)
 	/* if we're resuming from S3, the SMM code is already in place,
 	 * so don't copy it again to keep the current SMM state */
 
-	if (!is_wakeup()) {
+	if (!acpi_is_wakeup_s3()) {
 		/* enable the SMM memory window */
 		pci_write_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), SMRAM,
 					D_OPEN | G_SMRAME | C_BASE_SEG);



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