x86: Notify the FSP of the 'end firmware' event

Send this notification when U-Boot is about to boot into Linux, as
requested by the FSP.

Currently this causes a crash with the APL FSP, so leave it disabled for
now.

Signed-off-by: Simon Glass <sjg@chromium.org>

2 files changed, 31 insertions, 0 deletions

diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index 69c14189d1..f869275396 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -189,6 +189,14 @@ __weak void board_final_init(void)
 {
 }
 
+/*
+ * Implement a weak default function for boards that need to do some final
+ * processing before booting the OS.
+ */
+__weak void board_final_cleanup(void)
+{
+}
+
 int last_stage_init(void)
 {
 	struct acpi_fadt __maybe_unused *fadt;
@@ -218,6 +226,13 @@ int last_stage_init(void)
 		}
 	}
 
+	/*
+	 * TODO(sjg@chromium.org): Move this to bootm_announce_and_cleanup()
+	 * once APL FSP-S at 0x200000 does not overlap with the bzimage at
+	 * 0x100000.
+	 */
+	board_final_cleanup();
+
 	return 0;
 }
 #endif
diff --git a/arch/x86/lib/fsp/fsp_common.c b/arch/x86/lib/fsp/fsp_common.c
index ea52954725..4061fa244c 100644
--- a/arch/x86/lib/fsp/fsp_common.c
+++ b/arch/x86/lib/fsp/fsp_common.c
@@ -60,6 +60,22 @@ void board_final_init(void)
 		debug("OK\n");
 }
 
+void board_final_cleanup(void)
+{
+	u32 status;
+
+	/* TODO(sjg@chromium.org): This causes Linux to crash */
+	return;
+
+	/* call into FspNotify */
+	debug("Calling into FSP (notify phase INIT_PHASE_END_FIRMWARE): ");
+	status = fsp_notify(NULL, INIT_PHASE_END_FIRMWARE);
+	if (status)
+		debug("fail, error code %x\n", status);
+	else
+		debug("OK\n");
+}
+
 int fsp_save_s3_stack(void)
 {
 	struct udevice *dev;