Merge tag 'arc-updates-for-2018.11-rc2' of git://git.denx.de/u-boot-arc

Here we do a couple of impovements for all ARC boards
as well as introduce yet another developemnt board.

1. Now for ARC boards we print CPU and board info
   which is useful for users and helps with
   analysis of logs "post-mortem".

2. Synopsys IoT development kit support is added
   This one might bw a bit too late as we're past RC1
   but:
    1) This doesn't affect any other arches etc
       as we change purely ARC code.
    2) I've got a chance to talk about U-Boot on
       IoT platforms during ELCE (my proposal was on
       a wait list and only this week I've got
       an update and invitation to talk) so it would
       be good to have this board as a primer in upstream
       code-base by the time of ELCE 2018.
    3) For complete support of IoT devkit I'm yet to
       significantly rework regmap subsystem in U-Boot
       but that's a different topic and hopefully it will
       be done sometime soon... though not this release
       cycle for sure.

1 files changed, 84 insertions, 0 deletions

diff --git a/include/configs/iot_devkit.h b/include/configs/iot_devkit.h
new file mode 100644
index 00000000000..4ffe1141d92
--- /dev/null
+++ b/include/configs/iot_devkit.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+ */
+
+#ifndef _CONFIG_IOT_DEVKIT_H_
+#define _CONFIG_IOT_DEVKIT_H_
+
+#include <linux/sizes.h>
+
+/*
+ *                         MEMORY MAP
+ *
+ * eFlash: 0x0000_0000 - 0x0008_0000 (512K)
+ *   ICCM: 0x2000_0000 - 0x2004_0000 (256K)
+ *   SRAM: 0x3000_0000 - 0x3002_0000 (128K)
+ *   DCCM: 0x8000_0000 - 0x8002_0000 (128K)
+ *     Note: only data goes here, as IFQ cannot fetch instructions from DCCM
+ *
+ *
+ *                         RAM PARTITIONING
+ *
+ *   +-----------+----------+---------------------+-------------+
+ *   | <-- Stack |  .data   | Malloc              | Environment |
+ *   +-----------+----------+---------------------+-------------+
+ *   :           :          :                     :\___________/
+ *   :           :          :                     :      |
+ *   :           :          :                     :     CONFIG_ENV_SIZE
+ *   :           :           \____________________/
+ *   :           :                     |
+ *   :           :                    CONFIG_SYS_MALLOC_LEN
+ *   :           :
+ *   :          Specified explicitly by CONFIG_SYS_INIT_SP_ADDR
+ *   :
+ *  Specified explicitly by CONFIG_SYS_SDRAM_BASE
+ *
+ *  NOTES:
+ *    - Stack starts from CONFIG_SYS_INIT_SP_ADDR and grows down,
+ *      i.e. towards CONFIG_SYS_SDRAM_BASE but nothing stops it from crossing
+ *      that CONFIG_SYS_SDRAM_BASE in which case data won't be really saved on
+ *      stack any longer and values popped from stack will contain garbage
+ *      leading to unexpected behavior, typically but not limited to:
+ *        - "Returning" back to bogus caller function
+ *        - Reading data from weird addresses
+ */
+
+#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
+
+#define SRAM_BASE			0x30000000
+#define SRAM_SIZE			SZ_128K
+
+#define DCCM_BASE			0x80000000
+#define DCCM_SIZE			SZ_128K
+
+#define CONFIG_SYS_SDRAM_BASE		DCCM_BASE
+#define CONFIG_SYS_SDRAM_SIZE		DCCM_SIZE
+
+#define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_SDRAM_BASE + SZ_32K)
+
+#define CONFIG_SYS_MALLOC_LEN		SZ_64K
+#define CONFIG_SYS_BOOTM_LEN		SZ_128K
+#define CONFIG_SYS_LOAD_ADDR		SRAM_BASE
+
+#define ROM_BASE			CONFIG_SYS_MONITOR_BASE
+#define ROM_SIZE			SZ_256K
+
+#define RAM_DATA_BASE			CONFIG_SYS_INIT_SP_ADDR
+#define RAM_DATA_SIZE			CONFIG_SYS_SDRAM_SIZE - \
+					(CONFIG_SYS_INIT_SP_ADDR - \
+					CONFIG_SYS_SDRAM_BASE) - \
+					CONFIG_SYS_MALLOC_LEN - \
+					CONFIG_ENV_SIZE
+
+/* Required by DW MMC driver */
+#define CONFIG_BOUNCE_BUFFER
+
+/*
+ * Environment
+ */
+#define CONFIG_ENV_SIZE			SZ_4K
+#define CONFIG_BOOTFILE			"app.bin"
+#define CONFIG_LOADADDR			CONFIG_SYS_LOAD_ADDR
+
+#endif /* _CONFIG_IOT_DEVKIT_H_ */