avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/amcc/redwood/Kconfig

@@ -0,0 +1,16 @@
+if TARGET_REDWOOD
+
+config SYS_BOARD
+	default "redwood"
+
+config SYS_VENDOR
+	default "amcc"
+
+config SYS_CONFIG_NAME
+	default "redwood"
+
+config DISPLAY_BOARDINFO
+	bool
+	default y
+
+endif

u-boot/board/amcc/redwood/MAINTAINERS

@@ -0,0 +1,6 @@
+REDWOOD BOARD
+M:	Feng Kan <fkan@amcc.com>
+S:	Maintained
+F:	board/amcc/redwood/
+F:	include/configs/redwood.h
+F:	configs/redwood_defconfig

u-boot/board/amcc/redwood/Makefile

@@ -0,0 +1,9 @@
+#
+# (C) Copyright 2008
+# Feng Kan, Applied Micro Circuits Corp., fkan@amcc.com.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	= redwood.o
+extra-y	+= init.o

u-boot/board/amcc/redwood/config.mk

@@ -0,0 +1,20 @@
+#
+# (C) Copyright 2008
+# Feng Kan, Applied Micro Circuits Corp., fkan@amcc.com.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+#
+# AMCC 460SX Reference Platform (redwood) board
+#
+
+PLATFORM_CPPFLAGS += -DCONFIG_440=1
+
+ifeq ($(debug),1)
+PLATFORM_CPPFLAGS += -DDEBUG
+endif
+
+ifeq ($(dbcr),1)
+PLATFORM_CPPFLAGS += -DCONFIG_SYS_INIT_DBCR=0x8cff0000
+endif

u-boot/board/amcc/redwood/init.S

@@ -0,0 +1,62 @@
+/*
+ * (C) Copyright 2008
+ * Feng Kan, Applied Micro Circuits Corp., fkan@amcc.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <ppc_asm.tmpl>
+#include <config.h>
+#include <asm/mmu.h>
+#include <asm/ppc4xx.h>
+
+/**************************************************************************
+ * TLB TABLE
+ *
+ * This table is used by the cpu boot code to setup the initial tlb
+ * entries. Rather than make broad assumptions in the cpu source tree,
+ * this table lets each board set things up however they like.
+ *
+ *  Pointer to the table is returned in r1
+ *
+ *************************************************************************/
+
+	.section .bootpg,"ax"
+	.globl tlbtab
+tlbtab:
+	tlbtab_start
+
+	/*
+	 * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the
+	 * speed up boot process. It is patched after relocation to enable SA_I
+	 */
+	tlbentry(0xff000000, SZ_16M, 0xff000000, 4, AC_RWX | SA_G)
+
+	/*
+	 * TLB entries for SDRAM are not needed on this platform.
+	 * They are dynamically generated in the SPD DDR(2) detection
+	 * routine.
+	 */
+
+	/* Although 512 KB, map 256k at a time */
+	tlbentry(CONFIG_SYS_ISRAM_BASE, SZ_256K, 0x00000000, 4, AC_RWX | SA_I)
+	tlbentry(CONFIG_SYS_ISRAM_BASE + 0x40000, SZ_256K, 0x00040000, 4, AC_RWX | SA_I)
+
+	tlbentry(CONFIG_SYS_OPER_FLASH, SZ_16M, 0xE7000000, 4,AC_RWX | SA_IG)
+
+	/*
+	 * Peripheral base
+	 */
+	tlbentry(CONFIG_SYS_PERIPHERAL_BASE, SZ_16K, 0xEF600000, 4, AC_RW | SA_IG)
+
+	tlbentry(CONFIG_SYS_PCIE0_XCFGBASE,SZ_16M, 0x00000000, 0xC, AC_RW | SA_IG)
+	tlbentry(CONFIG_SYS_PCIE1_XCFGBASE,SZ_16M, 0x10000000, 0xC, AC_RW | SA_IG)
+	tlbentry(CONFIG_SYS_PCIE2_XCFGBASE,SZ_16M, 0x20000000, 0xC, AC_RW | SA_IG)
+
+	tlbentry(CONFIG_SYS_PCIE0_MEMBASE, SZ_256M, 0x00000000, 0xD, AC_RW | SA_IG)
+	tlbentry(CONFIG_SYS_PCIE1_MEMBASE, SZ_256M, 0x00000000, 0xE, AC_RW | SA_IG)
+
+	tlbentry(CONFIG_SYS_PCIE0_REGBASE, SZ_64K, 0x30000000, 0xC, AC_RW | SA_IG)
+	tlbentry(CONFIG_SYS_PCIE1_REGBASE, SZ_64K, 0x30010000, 0xC, AC_RW | SA_IG)
+	tlbentry(CONFIG_SYS_PCIE2_REGBASE, SZ_64K, 0x30020000, 0xC, AC_RW | SA_IG)
+	tlbtab_end

u-boot/board/amcc/redwood/redwood.c

@@ -0,0 +1,440 @@
+/*
+ * This is the main board level file for the Redwood AMCC board.
+ *
+ * (C) Copyright 2008
+ * Feng Kan, Applied Micro Circuits Corp., fkan@amcc.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include "redwood.h"
+#include <asm/ppc4xx.h>
+#include <asm/processor.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+int compare_to_true(char *str);
+char *remove_l_w_space(char *in_str);
+char *remove_t_w_space(char *in_str);
+int get_console_port(void);
+
+static void early_init_EBC(void);
+static int bootdevice_selected(void);
+static void early_reinit_EBC(int);
+static void early_init_UIC(void);
+
+/*
+ * Define Boot devices
+ */
+#define BOOT_FROM_8BIT_SRAM			0x00
+#define BOOT_FROM_16BIT_SRAM			0x01
+#define BOOT_FROM_32BIT_SRAM			0x02
+#define BOOT_FROM_8BIT_NAND			0x03
+#define BOOT_FROM_16BIT_NOR			0x04
+#define BOOT_DEVICE_UNKNOWN			0xff
+
+/*
+ * EBC Devices Characteristics
+ *   Peripheral Bank Access Parameters       -   EBC_BxAP
+ *   Peripheral Bank Configuration Register  -   EBC_BxCR
+ */
+
+/*
+ * 8 bit width SRAM
+ * BU Value
+ * BxAP : 0x03800000  - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
+ * B0CR : 0xff098000  - BAS = ff0 - 100 11 00 0000000000000
+ * B2CR : 0xe7098000  - BAS = e70 - 100 11 00 0000000000000
+ */
+#define EBC_BXAP_8BIT_SRAM					\
+	EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(7)  |	\
+	EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |	\
+	EBC_BXAP_CSN_ENCODE(0)  | EBC_BXAP_OEN_ENCODE(0)  |	\
+	EBC_BXAP_WBN_ENCODE(0)  | EBC_BXAP_WBF_ENCODE(0)  |	\
+	EBC_BXAP_TH_ENCODE(0)   | EBC_BXAP_RE_DISABLED    |	\
+	EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_WRITEONLY  |	\
+	EBC_BXAP_PEN_DISABLED
+
+#define EBC_BXAP_16BIT_SRAM	EBC_BXAP_8BIT_SRAM
+#define EBC_BXAP_32BIT_SRAM	EBC_BXAP_8BIT_SRAM
+
+/*
+ * NAND flash
+ * BU Value
+ * BxAP : 0x048ff240  - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
+ * B0CR : 0xff09a000  - BAS = ff0 - 100 11 01 0000000000000
+ * B2CR : 0xe709a000  - BAS = e70 - 100 11 01 0000000000000
+*/
+#define EBC_BXAP_NAND						\
+	EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(7)  |	\
+	EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |	\
+	EBC_BXAP_CSN_ENCODE(0)  | EBC_BXAP_OEN_ENCODE(0)  |	\
+	EBC_BXAP_WBN_ENCODE(0)  | EBC_BXAP_WBF_ENCODE(0)  |	\
+	EBC_BXAP_TH_ENCODE(0)   | EBC_BXAP_RE_DISABLED    |	\
+	EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_WRITEONLY  |	\
+	EBC_BXAP_PEN_DISABLED
+
+/*
+ * NOR flash
+ * BU Value
+ * BxAP : 0x048ff240  - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
+ * B0CR : 0xff09a000  - BAS = ff0 - 100 11 01 0000000000000
+ * B2CR : 0xe709a000  - BAS = e70 - 100 11 01 0000000000000
+*/
+#define EBC_BXAP_NOR						\
+	EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(7)  |	\
+	EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |	\
+	EBC_BXAP_CSN_ENCODE(0)  | EBC_BXAP_OEN_ENCODE(0)  |	\
+	EBC_BXAP_WBN_ENCODE(0)  | EBC_BXAP_WBF_ENCODE(0)  |	\
+	EBC_BXAP_TH_ENCODE(0)   | EBC_BXAP_RE_DISABLED    |	\
+	EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_WRITEONLY  |	\
+	EBC_BXAP_PEN_DISABLED
+
+/*
+ * FPGA
+ * BU value :
+ * B1AP = 0x05895240  - 0 00001011 0 00 10 01 01 01 001 0 0 1 0 00000
+ * B1CR = 0xe201a000  - BAS = e20 - 000 11 01 00000000000000
+ */
+#define EBC_BXAP_FPGA						\
+	EBC_BXAP_BME_DISABLED   | EBC_BXAP_TWT_ENCODE(11) |	\
+	EBC_BXAP_BCE_DISABLE    | EBC_BXAP_BCT_2TRANS     |	\
+	EBC_BXAP_CSN_ENCODE(10) | EBC_BXAP_OEN_ENCODE(1)  |	\
+	EBC_BXAP_WBN_ENCODE(1)  | EBC_BXAP_WBF_ENCODE(1)  |	\
+	EBC_BXAP_TH_ENCODE(1)   | EBC_BXAP_RE_DISABLED    |	\
+	EBC_BXAP_SOR_DELAYED    | EBC_BXAP_BEM_RW         |	\
+	EBC_BXAP_PEN_DISABLED
+
+#define EBC_BXCR_8BIT_SRAM_CS0						\
+	EBC_BXCR_BAS_ENCODE(0xFFE00000) | EBC_BXCR_BS_1MB           |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_32BIT_SRAM_CS0						\
+	EBC_BXCR_BAS_ENCODE(0xFFC00000) | EBC_BXCR_BS_1MB           |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_32BIT
+
+#define EBC_BXCR_NAND_CS0						\
+	EBC_BXCR_BAS_ENCODE(0xFF000000) | EBC_BXCR_BS_16MB          |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_16BIT_SRAM_CS0						\
+	EBC_BXCR_BAS_ENCODE(0xFFE00000) | EBC_BXCR_BS_2MB           |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_NOR_CS0						\
+	EBC_BXCR_BAS_ENCODE(0xFF000000) | EBC_BXCR_BS_16MB          |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_NOR_CS1						\
+	EBC_BXCR_BAS_ENCODE(0xE0000000) | EBC_BXCR_BS_128MB         |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_NAND_CS1						\
+	EBC_BXCR_BAS_ENCODE(0xE0000000) | EBC_BXCR_BS_128MB         |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_NAND_CS2						\
+	EBC_BXCR_BAS_ENCODE(0xC0000000) | EBC_BXCR_BS_128MB         |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_SRAM_CS2						\
+	EBC_BXCR_BAS_ENCODE(0xC0000000) | EBC_BXCR_BS_4MB           |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_32BIT
+
+#define EBC_BXCR_LARGE_FLASH_CS2					\
+	EBC_BXCR_BAS_ENCODE(0xE7000000) | EBC_BXCR_BS_16MB          |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_FPGA_CS3						\
+	EBC_BXCR_BAS_ENCODE(0xE2000000) | EBC_BXCR_BS_1MB           |	\
+	EBC_BXCR_BU_RW                  | EBC_BXCR_BW_16BIT
+
+/*****************************************************************************
+ * UBOOT initiated board specific function calls
+ ****************************************************************************/
+
+int board_early_init_f(void)
+{
+	int computed_boot_device = BOOT_DEVICE_UNKNOWN;
+
+	/*
+	 * Initialise EBC
+	 */
+	early_init_EBC();
+
+	/*
+	 * Determine which boot device was selected
+	 */
+	computed_boot_device = bootdevice_selected();
+
+	/*
+	 * Reinit EBC based on selected boot device
+	 */
+	early_reinit_EBC(computed_boot_device);
+
+	/*
+	 * Setup for UIC on 460SX redwood board
+	 */
+	early_init_UIC();
+
+	return 0;
+}
+
+int checkboard(void)
+{
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
+
+	printf("Board: Redwood - AMCC 460SX Reference Board");
+	if (i > 0) {
+		puts(", serial# ");
+		puts(buf);
+	}
+	putc('\n');
+
+	return 0;
+}
+
+static void early_init_EBC(void)
+{
+	/*
+	 * Initialize EBC CONFIG -
+	 * Keep the Default value, but the bit PDT which has to be set to 1 ?TBC
+	 * default value :
+	 *      0x07C00000 - 0 0 000 1 1 1 1 1 0000 0 00000 000000000000
+	 */
+	mtebc(EBC0_CFG, EBC_CFG_LE_UNLOCK |
+	      EBC_CFG_PTD_ENABLE |
+	      EBC_CFG_RTC_16PERCLK |
+	      EBC_CFG_ATC_PREVIOUS |
+	      EBC_CFG_DTC_PREVIOUS |
+	      EBC_CFG_CTC_PREVIOUS |
+	      EBC_CFG_OEO_PREVIOUS |
+	      EBC_CFG_EMC_DEFAULT | EBC_CFG_PME_DISABLE | EBC_CFG_PR_16);
+
+	/*
+	 * PART 1 : Initialize EBC Bank 3
+	 * ==============================
+	 * Bank1 is always associated to the EPLD.
+	 * It has to be initialized prior to other banks settings computation
+	 * since some board registers values may be needed to determine the
+	 * boot type
+	 */
+	mtebc(PB1AP, EBC_BXAP_FPGA);
+	mtebc(PB1CR, EBC_BXCR_FPGA_CS3);
+
+}
+
+static int bootdevice_selected(void)
+{
+	unsigned long sdr0_pinstp;
+	unsigned long bootstrap_settings;
+	int computed_boot_device = BOOT_DEVICE_UNKNOWN;
+
+	/*
+	 *  Determine which boot device was selected
+	 *  =================================================
+	 *
+	 *  Read Pin Strap Register in PPC460SX
+	 *  Result can either be :
+	 *   - Boot strap = boot from EBC 8bits     => Small Flash
+	 *   - Boot strap = boot from PCI
+	 *   - Boot strap = IIC
+	 *  In case of boot from IIC, read Serial Device Strap Register1
+	 *
+	 *  Result can either be :
+	 *   - Boot from EBC  - EBC Bus Width = 8bits    => Small Flash
+	 *   - Boot from EBC  - EBC Bus Width = 16bits   => Large Flash or SRAM
+	 *   - Boot from PCI
+	 */
+
+	/* Read Pin Strap Register in PPC460SX */
+	mfsdr(SDR0_PINSTP, sdr0_pinstp);
+	bootstrap_settings = sdr0_pinstp & SDR0_PSTRP0_BOOTSTRAP_MASK;
+
+	switch (bootstrap_settings) {
+	case SDR0_PSTRP0_BOOTSTRAP_SETTINGS0:
+		/*
+		 * Boot from SRAM, 8bit width
+		 */
+		computed_boot_device = BOOT_FROM_8BIT_SRAM;
+		break;
+	case SDR0_PSTRP0_BOOTSTRAP_SETTINGS1:
+		/*
+		 * Boot from SRAM, 32bit width
+		 */
+		computed_boot_device = BOOT_FROM_32BIT_SRAM;
+		break;
+	case SDR0_PSTRP0_BOOTSTRAP_SETTINGS2:
+		/*
+		 * Boot from NAND, 8bit width
+		 */
+		computed_boot_device = BOOT_FROM_8BIT_NAND;
+		break;
+	case SDR0_PSTRP0_BOOTSTRAP_SETTINGS4:
+		/*
+		 * Boot from SRAM, 16bit width
+		 * Boot setting in IIC EEPROM 0x50
+		 */
+		computed_boot_device = BOOT_FROM_16BIT_SRAM;
+		break;
+	case SDR0_PSTRP0_BOOTSTRAP_SETTINGS5:
+		/*
+		 * Boot from NOR, 16bit width
+		 * Boot setting in IIC EEPROM 0x54
+		 */
+		computed_boot_device = BOOT_FROM_16BIT_NOR;
+		break;
+	default:
+		/* should not be */
+		computed_boot_device = BOOT_DEVICE_UNKNOWN;
+		break;
+	}
+
+	return computed_boot_device;
+}
+
+static void early_reinit_EBC(int computed_boot_device)
+{
+	/*
+	 *  Compute EBC settings depending on selected boot device
+	 *  ======================================================
+	 *
+	 * Resulting EBC init will be among following configurations :
+	 *
+	 *  - Boot from EBC 8bits => boot from Small Flash selected
+	 *            EBC-CS0     = Small Flash
+	 *            EBC-CS2     = Large Flash and SRAM
+	 *
+	 *  - Boot from EBC 16bits => boot from Large Flash or SRAM
+	 *            EBC-CS0     = Large Flash or SRAM
+	 *            EBC-CS2     = Small Flash
+	 *
+	 *  - Boot from PCI
+	 *            EBC-CS0     = not initialized to avoid address contention
+	 *            EBC-CS2     = same as boot from Small Flash selected
+	 */
+
+	unsigned long ebc0_cs0_bxap_value = 0, ebc0_cs0_bxcr_value = 0;
+	unsigned long ebc0_cs1_bxap_value = 0, ebc0_cs1_bxcr_value = 0;
+	unsigned long ebc0_cs2_bxap_value = 0, ebc0_cs2_bxcr_value = 0;
+
+	switch (computed_boot_device) {
+		/*-------------------------------------------------------------------*/
+	case BOOT_FROM_8BIT_SRAM:
+		/*-------------------------------------------------------------------*/
+		ebc0_cs0_bxap_value = EBC_BXAP_8BIT_SRAM;
+		ebc0_cs0_bxcr_value = EBC_BXCR_8BIT_SRAM_CS0;
+		ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+		ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+		ebc0_cs2_bxap_value = EBC_BXAP_NAND;
+		ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
+		break;
+
+		/*-------------------------------------------------------------------*/
+	case BOOT_FROM_16BIT_SRAM:
+		/*-------------------------------------------------------------------*/
+		ebc0_cs0_bxap_value = EBC_BXAP_16BIT_SRAM;
+		ebc0_cs0_bxcr_value = EBC_BXCR_16BIT_SRAM_CS0;
+		ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+		ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+		ebc0_cs2_bxap_value = EBC_BXAP_NAND;
+		ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
+		break;
+
+		/*-------------------------------------------------------------------*/
+	case BOOT_FROM_32BIT_SRAM:
+		/*-------------------------------------------------------------------*/
+		ebc0_cs0_bxap_value = EBC_BXAP_32BIT_SRAM;
+		ebc0_cs0_bxcr_value = EBC_BXCR_32BIT_SRAM_CS0;
+		ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+		ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+		ebc0_cs2_bxap_value = EBC_BXAP_NAND;
+		ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
+		break;
+
+		/*-------------------------------------------------------------------*/
+	case BOOT_FROM_16BIT_NOR:
+		/*-------------------------------------------------------------------*/
+		ebc0_cs0_bxap_value = EBC_BXAP_NOR;
+		ebc0_cs0_bxcr_value = EBC_BXCR_NOR_CS0;
+		ebc0_cs1_bxap_value = EBC_BXAP_NAND;
+		ebc0_cs1_bxcr_value = EBC_BXCR_NAND_CS1;
+		ebc0_cs2_bxap_value = EBC_BXAP_32BIT_SRAM;
+		ebc0_cs2_bxcr_value = EBC_BXCR_SRAM_CS2;
+		break;
+
+		/*-------------------------------------------------------------------*/
+	case BOOT_FROM_8BIT_NAND:
+		/*-------------------------------------------------------------------*/
+		ebc0_cs0_bxap_value = EBC_BXAP_NAND;
+		ebc0_cs0_bxcr_value = EBC_BXCR_NAND_CS0;
+		ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+		ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+		ebc0_cs2_bxap_value = EBC_BXAP_32BIT_SRAM;
+		ebc0_cs2_bxcr_value = EBC_BXCR_SRAM_CS2;
+		break;
+
+		/*-------------------------------------------------------------------*/
+	default:
+		/*-------------------------------------------------------------------*/
+		/* BOOT_DEVICE_UNKNOWN */
+		break;
+	}
+
+	mtebc(PB0AP, ebc0_cs0_bxap_value);
+	mtebc(PB0CR, ebc0_cs0_bxcr_value);
+	mtebc(PB1AP, ebc0_cs1_bxap_value);
+	mtebc(PB1CR, ebc0_cs1_bxcr_value);
+	mtebc(PB2AP, ebc0_cs2_bxap_value);
+	mtebc(PB2CR, ebc0_cs2_bxcr_value);
+}
+
+static void early_init_UIC(void)
+{
+	/*
+	 * Initialise UIC registers.  Clear all interrupts.  Disable all
+	 * interrupts.
+	 * Set critical interrupt values.  Set interrupt polarities.  Set
+	 * interrupt trigger levels.  Make bit 0 High  priority.  Clear all
+	 * interrupts again.
+	 */
+	mtdcr(UIC3SR, 0xffffffff);	/* Clear all interrupts */
+	mtdcr(UIC3ER, 0x00000000);	/* disable all interrupts */
+	mtdcr(UIC3CR, 0x00000000);	/* Set Critical / Non Critical
+					 * interrupts */
+	mtdcr(UIC3PR, 0xffffffff);	/* Set Interrupt Polarities */
+	mtdcr(UIC3TR, 0x001fffff);	/* Set Interrupt Trigger Levels */
+	mtdcr(UIC3VR, 0x00000000);	/* int31 highest, base=0x000 */
+	mtdcr(UIC3SR, 0xffffffff);	/* clear all  interrupts */
+
+	mtdcr(UIC2SR, 0xffffffff);	/* Clear all interrupts */
+	mtdcr(UIC2ER, 0x00000000);	/* disable all interrupts */
+	mtdcr(UIC2CR, 0x00000000);	/* Set Critical / Non Critical
+					 * interrupts */
+	mtdcr(UIC2PR, 0xebebebff);	/* Set Interrupt Polarities */
+	mtdcr(UIC2TR, 0x74747400);	/* Set Interrupt Trigger Levels */
+	mtdcr(UIC2VR, 0x00000000);	/* int31 highest, base=0x000 */
+	mtdcr(UIC2SR, 0xffffffff);	/* clear all interrupts */
+
+	mtdcr(UIC1SR, 0xffffffff);	/* Clear all interrupts */
+	mtdcr(UIC1ER, 0x00000000);	/* disable all interrupts */
+	mtdcr(UIC1CR, 0x00000000);	/* Set Critical / Non Critical
+					 * interrupts */
+	mtdcr(UIC1PR, 0xffffffff);	/* Set Interrupt Polarities */
+	mtdcr(UIC1TR, 0x001fc0ff);	/* Set Interrupt Trigger Levels */
+	mtdcr(UIC1VR, 0x00000000);	/* int31 highest, base=0x000 */
+	mtdcr(UIC1SR, 0xffffffff);	/* clear all interrupts */
+
+	mtdcr(UIC0SR, 0xffffffff);	/* Clear all interrupts */
+	mtdcr(UIC0ER, 0x00000000);	/* disable all interrupts excepted
+					 * cascade to be checked */
+	mtdcr(UIC0CR, 0x00104001);	/* Set Critical / Non Critical
+					 * interrupts */
+	mtdcr(UIC0PR, 0xffffffff);	/* Set Interrupt Polarities */
+	mtdcr(UIC0TR, 0x000f003c);	/* Set Interrupt Trigger Levels */
+	mtdcr(UIC0VR, 0x00000000);	/* int31 highest, base=0x000 */
+	mtdcr(UIC0SR, 0xffffffff);	/* clear all interrupts */
+
+}

u-boot/board/amcc/redwood/redwood.h

@@ -0,0 +1,34 @@
+/*
+ * (C) Copyright 2008
+ * Feng Kan, Applied Micro Circuit Corp., fkan@amcc.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __REDWOOD_H_
+#define __REDWOOD_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*----------------------------------------------------------------------------+
+| Defines
++----------------------------------------------------------------------------*/
+/* Pin Straps Reg */
+#define SDR0_PSTRP0			0x0040
+#define SDR0_PSTRP0_BOOTSTRAP_MASK	0xE0000000	/* Strap Bits */
+
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS0	0x00000000	/* Default strap settings 0 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS1	0x20000000	/* Default strap settings 1 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS2	0x40000000	/* Default strap settings 2 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS3	0x60000000	/* Default strap settings 3 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS4	0x80000000	/* Default strap settings 4 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS5	0xA0000000	/* Default strap settings 5 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS6	0xC0000000	/* Default strap settings 6 */
+#define SDR0_PSTRP0_BOOTSTRAP_SETTINGS7	0xE0000000	/* Default strap settings 7 */
+
+#ifdef __cplusplus
+}
+#endif
+#endif				/* __REDWOOD_H_ */