armv7R: K3: am654: Add support to start ATF from R5 SPL

Considering the boot time requirements, Cortex-A core
should be able to start immediately after SPL on R5.
Add support for the same.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
new file mode 100644
index 0000000..cc89d4a
--- /dev/null
+++ b/arch/arm/mach-k3/common.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * K3: Common Architecture initialization
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ *	Lokesh Vutla <lokeshvutla@ti.com>
+ */
+
+#include <common.h>
+#include <spl.h>
+#include "common.h"
+#include <dm.h>
+#include <remoteproc.h>
+
+#ifdef CONFIG_SYS_K3_SPL_ATF
+void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
+{
+	int ret;
+
+	/*
+	 * It is assumed that remoteproc device 1 is the corresponding
+	 * cortex A core which runs ATF. Make sure DT reflects the same.
+	 */
+	ret = rproc_dev_init(1);
+	if (ret) {
+		printf("%s: ATF failed to Initialize on rproc: ret= %d\n",
+		       __func__, ret);
+		hang();
+	}
+
+	ret = rproc_load(1, spl_image->entry_point, 0x200);
+	if (ret) {
+		printf("%s: ATF failed to load on rproc: ret= %d\n",
+		       __func__, ret);
+		hang();
+	}
+
+	/* Add an extra newline to differentiate the ATF logs from SPL*/
+	printf("Starting ATF on ARM64 core...\n\n");
+
+	ret = rproc_start(1);
+	if (ret) {
+		printf("%s: ATF failed to start on rproc: ret= %d\n",
+		       __func__, ret);
+		hang();
+	}
+
+	debug("ATF started. Wait indefiniely\n");
+	while (1)
+		asm volatile("wfe");
+}
+#endif