soc/intel/apollolake: add support for verstage

There previously was no support for building verstage on apollolake.
Add that suport by linking in the appropriate modules as well as
providing vboot_platform_is_resuming(). The link address for verstage
is the same as FSP-M because they would never be in CAR along side
each other. Additionally, program the ACPI I/O BAR and enable decoding
so sleep state can be determined for early firmware verification.

Change-Id: I1a0baab342ac55fd82dbed476abe0063787e3491
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/14972
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/apollolake/Kconfig

@@ -123,6 +123,12 @@ config ROMSTAGE_ADDR
 	help
 	  The base address (in CAR) where romstage should be linked
 
+config VERSTAGE_ADDR
+	hex
+	default 0xfef60000
+	help
+	  The base address (in CAR) where verstage should be linked
+
 config CACHE_MRC_SETTINGS
 	bool
 	default y

src/soc/intel/apollolake/Makefile.inc

@@ -56,6 +56,12 @@ postcar-y += mmap_boot.c
 postcar-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
 postcar-y += tsc_freq.c
 
+verstage-y += memmap.c
+verstage-y += mmap_boot.c
+verstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
+verstage-y += tsc_freq.c
+verstage-y += pmutil.c
+
 CPPFLAGS_common += -I$(src)/soc/intel/apollolake/include
 
 # Since FSP-M runs in CAR we need to relocate it to a specific address

src/soc/intel/apollolake/bootblock/bootblock.c

@@ -67,6 +67,12 @@ void asmlinkage bootblock_c_entry(uint32_t tsc_hi, uint32_t tsc_lo)
 	pci_write_config32(dev, PCI_BASE_ADDRESS_1, 0);
 	pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
 
+	/* Decode the ACPI I/O port range for early firmware verification.*/
+	dev = PMC_DEV;
+	pci_write_config16(dev, PCI_BASE_ADDRESS_4, ACPI_PMIO_BASE);
+	pci_write_config16(dev, PCI_COMMAND,
+				PCI_COMMAND_IO | PCI_COMMAND_MASTER);
+
 	/* Call lib/bootblock.c main */
 	bootblock_main_with_timestamp(((uint64_t)tsc_hi << 32) | tsc_lo);
 }

src/soc/intel/apollolake/pmutil.c

@@ -26,6 +26,7 @@
 #include <soc/pm.h>
 #include <device/device.h>
 #include <device/pci.h>
+#include <vendorcode/google/chromeos/vboot_common.h>
 
 static uintptr_t read_pmc_mmio_bar(void)
 {
@@ -336,3 +337,14 @@ int fill_power_state(struct chipset_power_state *ps)
 	printk(BIOS_DEBUG, "prev_sleep_state %d\n", ps->prev_sleep_state);
 	return ps->prev_sleep_state;
 }
+
+int vboot_platform_is_resuming(void)
+{
+	int typ;
+
+	if (!(inw(ACPI_PMIO_BASE + PM1_STS) & WAK_STS))
+		return 0;
+
+	typ = (inl(ACPI_PMIO_BASE + PM1_CNT) & SLP_TYP) >> SLP_TYP_SHIFT;
+	return typ == SLP_TYP_S3;
+}