Define post codes for OS boot and resume

And move the pre-hardwaremain post code to 0x79
so it comes before hardwaremain at 0x80.

Emit these codes from ACPI OS resume vector as well
as the finalize step in bd82x6x southbridge.

Change-Id: I7f258998a2f6549016e99b67bc21f7c59d2bcf9e
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1702
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/arch/x86/boot/acpi.c

@@ -630,6 +630,7 @@ void suspend_resume(void)
 		/* Call mainboard resume handler first, if defined. */
 		if (mainboard_suspend_resume)
 			mainboard_suspend_resume();
+		post_code(POST_OS_RESUME);
 		acpi_jump_to_wakeup(wake_vec);
 	}
 }

src/include/console/post_codes.h

@@ -82,6 +82,13 @@
  */
 #define POST_ENTRY_C_START			0x13
 
+/**
+ * \brief Pre call to hardwaremain()
+ *
+ * POSTed right before hardwaremain is called from c_start.S
+ */
+#define POST_PRE_HARDWAREMAIN			0x79
+
 /**
  * \brief Entry into coreboot in hardwaremain (RAM)
  *
@@ -166,12 +173,18 @@
 #define POST_DEAD_CODE				0xee
 
 /**
- * \brief Pre call to hardwaremain()
+ * \brief Final code before OS resumes
  *
- * POSTed right before hardwaremain is called from c_start.S
- * TODO: Change this code to a lower number
+ * Called right before jumping to the OS resume vector.
  */
-#define POST_PRE_HARDWAREMAIN			0xfe
+#define POST_OS_RESUME				0xfd
+
+/**
+ * \brief Final code before OS boots
+ *
+ * This may not be called depending on the payload used.
+ */
+#define POST_OS_BOOT				0xfe
 
 /**
  * \brief Elfload fail or die() called

src/southbridge/intel/bd82x6x/finalize.c

@@ -20,6 +20,7 @@
 
 #include <arch/io.h>
 #include <arch/romcc_io.h>
+#include <console/post_codes.h>
 #include <northbridge/intel/sandybridge/pcie_config.c>
 #include "pch.h"
 #include "spi.h"
@@ -59,4 +60,7 @@ void intel_pch_finalize_smm(void)
 	RCBA32(0x21a4) = RCBA32(0x21a4);
 	pcie_write_config32(PCI_DEV(0, 27, 0), 0x74,
 		    pcie_read_config32(PCI_DEV(0, 27, 0), 0x74));
+
+	/* Indicate finalize step with post code */
+	outb(POST_OS_BOOT, 0x80);
 }