Change in coreboot[master]: amd/common/psp: Add BootDone command

[Marshall Dawson (Code Review)]

Marshall Dawson has uploaded this change for review. ( https://review.coreboot.org/22787

Change subject: amd/common/psp: Add BootDone command
......................................................................

amd/common/psp: Add BootDone command

After the PSP receives the MboxBiosCmdBootDone, it will no longer honor
any command where the command-response buffer exists outside of SMM
memory.  Add the command and automatically execute it before booting
the payload.

BUG=b:69971683
TEST=Boot Kahlee and observe console log

Change-Id: I8258a9e2f2627bf24342f927a3e7f49b49dc1d88
Signed-off-by: Marshall Dawson 
---
M src/soc/amd/common/block/psp/psp.c
1 file changed, 31 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/87/22787/1

diff --git a/src/soc/amd/common/block/psp/psp.c b/src/soc/amd/common/block/psp/psp.c
index 5aedfc1..f4aca79 100644
--- a/src/soc/amd/common/block/psp/psp.c
+++ b/src/soc/amd/common/block/psp/psp.c
@@ -18,6 +18,7 @@
 #include <region_file.h>
 #include <timer.h>
 #include <device/pci_def.h>
+#include <bootstate.h>
 #include <console/console.h>
 #include <amdblocks/psp.h>

@@ -203,6 +204,33 @@
 }

/*
+ * Notify the PSP that the system is completing the boot process.  Upon
+ * receiving this command, the PSP will only honor commands where the buffer
+ * is in SMM space.
+ */
+static void psp_notify_boot_done(void *unused)
+{
+	struct mbox_default_buffer buffer;
+	int cmd_status;
+
+	printk(BIOS_DEBUG, "PSP: Notify that POST is finishing... ");
+
+	buffer.header.size = sizeof(struct mbox_default_buffer);
+	buffer.header.status = 0; /* PSP does not report status for this cmd */
+
+	cmd_status = send_psp_command(MBOX_BIOS_CMD_BOOT_DONE, &buffer);
+
+	/* buffer's status shouldn't change but report it if it does */
+	if (rd_resp_sts(&buffer))
+		printk(BIOS_DEBUG, "buffer status=0x%x ",
+				rd_resp_sts(&buffer));
+	if (cmd_status)
+		printk(BIOS_DEBUG, "%s\n", status_to_string(cmd_status));
+	else
+		printk(BIOS_DEBUG, "OK\n");
+}
+
+/*
  * Tell the PSP to load a firmware blob from a location in the BIOS image.
  */
 static int psp_load_blob(int type, void *addr)
@@ -256,3 +284,6 @@
    }
    return r;
 }
+
+BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_BOOT, BS_ON_ENTRY,
+		psp_notify_boot_done, NULL);