[U-Boot] [RFC PATCH] ARM: spl: Introduce JTAG mode

[Michal Simek]

Introduce simple JTAG mode which stops CPU
before U-Boot image processing.

Signed-off-by: Ezra Savard <ezra.savard at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
Acked-by: Sören Brinkmann <soren.brinkmann at xilinx.com>
---

 arch/arm/include/asm/spl.h        | 1 +
 arch/microblaze/include/asm/spl.h | 1 +
 common/spl/spl.c                  | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/arch/arm/include/asm/spl.h b/arch/arm/include/asm/spl.h
index e5daf8912712..d690c5914f05 100644
--- a/arch/arm/include/asm/spl.h
+++ b/arch/arm/include/asm/spl.h
@@ -26,6 +26,7 @@ enum {
 	BOOT_DEVICE_SPI,
 	BOOT_DEVICE_SATA,
 	BOOT_DEVICE_I2C,
+	BOOT_DEVICE_JTAG,
 	BOOT_DEVICE_NONE
 };
 #endif
diff --git a/arch/microblaze/include/asm/spl.h b/arch/microblaze/include/asm/spl.h
index c1cae6cf0fe6..3715f4862a01 100644
--- a/arch/microblaze/include/asm/spl.h
+++ b/arch/microblaze/include/asm/spl.h
@@ -12,5 +12,6 @@
 #define BOOT_DEVICE_RAM		1
 #define BOOT_DEVICE_NOR		2
 #define BOOT_DEVICE_SPI		3
+#define BOOT_DEVICE_JTAG	4

 #endif
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 774fdad2523b..de1de880b738 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -215,6 +215,13 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
 		spl_sata_load_image();
 		break;
 #endif
+#ifdef CONFIG_SPL_JTAG_SUPPORT
+	case BOOT_DEVICE_JTAG:
+		debug("Ready for image");
+		while (1)
+			;
+		break;
+#endif
 	default:
 		debug("SPL: Un-supported Boot Device\n");
 		hang();
--
1.8.2.3

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