arm: mach-k3: am642: Add support for boot device detection
AM642 allows for booting from primary or backup boot media.
Both media can be chosen individually based on switch settings.
ROM looks for a valid image in primary boot media, if not found
then looks in backup boot media. In order to pass this boot media
information to boot loader, ROM stores a value at a particular
address. Add support for reading this information and determining
the boot media correctly.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
diff --git a/arch/arm/mach-k3/include/mach/am64_spl.h b/arch/arm/mach-k3/include/mach/am64_spl.h
new file mode 100644
index 0000000..36826cf
--- /dev/null
+++ b/arch/arm/mach-k3/include/mach/am64_spl.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Keerthy <j-keerthy@ti.com>
+ */
+#ifndef _ASM_ARCH_AM64_SPL_H_
+#define _ASM_ARCH_AM64_SPL_H_
+
+/* Primary BootMode devices */
+#define BOOT_DEVICE_RAM 0x00
+#define BOOT_DEVICE_OSPI 0x01
+#define BOOT_DEVICE_QSPI 0x02
+#define BOOT_DEVICE_SPI 0x03
+#define BOOT_DEVICE_ETHERNET 0x04
+#define BOOT_DEVICE_ETHERNET_RGMII 0x04
+#define BOOT_DEVICE_ETHERNET_RMII 0x05
+#define BOOT_DEVICE_I2C 0x06
+#define BOOT_DEVICE_UART 0x07
+#define BOOT_DEVICE_MMC 0x08
+#define BOOT_DEVICE_EMMC 0x09
+
+#define BOOT_DEVICE_USB 0x0A
+#define BOOT_DEVICE_GPMC_NOR 0x0C
+#define BOOT_DEVICE_PCIE 0x0D
+#define BOOT_DEVICE_XSPI 0x0E
+
+#define BOOT_DEVICE_NOBOOT 0x0F
+
+#define BOOT_DEVICE_MMC2 0x08
+#define BOOT_DEVICE_MMC1 0x09
+/* INVALID */
+#define BOOT_DEVICE_MMC2_2 0x1F
+
+/* Backup BootMode devices */
+#define BACKUP_BOOT_DEVICE_USB 0x01
+#define BACKUP_BOOT_DEVICE_UART 0x03
+#define BACKUP_BOOT_DEVICE_ETHERNET 0x04
+#define BACKUP_BOOT_DEVICE_MMC 0x05
+#define BACKUP_BOOT_DEVICE_SPI 0x06
+#define BACKUP_BOOT_DEVICE_I2C 0x07
+
+#define K3_PRIMARY_BOOTMODE 0x0
+
+#endif