1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-rockchip/bootrom.h b/arch/arm/include/asm/arch-rockchip/bootrom.h
new file mode 100644
index 0000000..0da78f3
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/bootrom.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) Copyright 2017 Heiko Stuebner <heiko@sntech.de>
+ * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
+ */
+
+#ifndef _ASM_ARCH_BOOTROM_H
+#define _ASM_ARCH_BOOTROM_H
+
+/*
+ * Saved Stack pointer address.
+ * Access might be needed in some special cases.
+ */
+extern u32 SAVE_SP_ADDR;
+
+/**
+ * back_to_bootrom() - return to bootrom (for TPL/SPL), passing a
+ *                     result code
+ *
+ * Transfer control back to the Rockchip BROM, restoring necessary
+ * register context and passing a command/result code to the BROM
+ * to instruct its next actions (e.g. continue boot sequence, enter
+ * download mode, ...).
+ *
+ * This function does not return.
+ *
+ * @brom_cmd: indicates how the bootrom should continue the boot
+ *            sequence (e.g. load the next stage)
+ */
+enum rockchip_bootrom_cmd {
+	/*
+	 * These can not start at 0, as 0 has a special meaning
+	 * for setjmp().
+	 */
+
+	BROM_BOOT_NEXTSTAGE = 1,  /* continue boot-sequence */
+	BROM_BOOT_ENTER_DNL,      /* have BROM enter download-mode */
+};
+
+void back_to_bootrom(enum rockchip_bootrom_cmd brom_cmd);
+
+/**
+ * Boot-device identifiers as used by the BROM
+ */
+enum {
+	BROM_BOOTSOURCE_NAND = 1,
+	BROM_BOOTSOURCE_EMMC = 2,
+	BROM_BOOTSOURCE_SPINOR = 3,
+	BROM_BOOTSOURCE_SPINAND = 4,
+	BROM_BOOTSOURCE_SD = 5,
+	BROM_BOOTSOURCE_USB = 10,
+	BROM_LAST_BOOTSOURCE = BROM_BOOTSOURCE_USB
+};
+
+extern const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1];
+
+/**
+ * Locations of the boot-device identifier in SRAM
+ */
+#define BROM_BOOTSOURCE_ID_ADDR   (CONFIG_IRAM_BASE + 0x10)
+
+#endif