[U-Boot] [PATCH v7 07/10] nds32/lib: add generic funcs in NDS32 lib

[Macpaul Lin]

Add Makefile, board.c, interrupts.c and bootm.c functions
to nds32 architecture.

Signed-off-by: Macpaul Lin <macpaul at andestech.com>
---
Changes for v1-v4:
  - code clean up and formatting style.

Changes for v5-v6:
  - board.c
   - Do some clean up and add code
   - Remove display banner which hasn't support.
   - Add ftpmu010 related power management unit code.
   - Remove useless LED related code.
   - Move SDRAM init to board sepecific files. (ex. adp-ag101.c)
   - Remove CONFIG_SOFT_I2C which hasn't been support.
   - Remove CONFIG_FSL_ESDHC which hasn't been support.
   - clean up.

Changes for v7:
  - clean up.
  - move single file patch arch/nds32/config.mk to this commit.
  - interrupts.c refine origin interrupt enable and disable.

 arch/nds32/config.mk        |   35 +++++
 arch/nds32/lib/Makefile     |   52 +++++++
 arch/nds32/lib/board.c      |  346 +++++++++++++++++++++++++++++++++++++++++++
 arch/nds32/lib/bootm.c      |  241 ++++++++++++++++++++++++++++++
 arch/nds32/lib/interrupts.c |  131 ++++++++++++++++
 5 files changed, 805 insertions(+), 0 deletions(-)
 create mode 100644 arch/nds32/config.mk
 create mode 100644 arch/nds32/lib/Makefile
 create mode 100644 arch/nds32/lib/board.c
 create mode 100644 arch/nds32/lib/bootm.c
 create mode 100644 arch/nds32/lib/interrupts.c

diff --git a/arch/nds32/config.mk b/arch/nds32/config.mk
new file mode 100644
index 0000000..ac5d0cf
--- /dev/null
+++ b/arch/nds32/config.mk
@@ -0,0 +1,35 @@
+#
+# (C) Copyright 2000-2002
+# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+#
+# (C) Copyright 2011
+# Shawn Lin, Andes Technology Corporation <nobuhiro at andestech.com>
+# Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+
+CROSS_COMPILE ?= nds32le-linux-
+
+STANDALONE_LOAD_ADDR = 0x300000 -T nds32.lds
+
+PLATFORM_RELFLAGS	+= -fno-strict-aliasing -fno-common
+PLATFORM_RELFLAGS	+= -gdwarf-2
+PLATFORM_CPPFLAGS	+= -DCONFIG_NDS32 -D__nds32__ -G0 -ffixed-8
+
+LDSCRIPT := $(SRCTREE)/$(CPUDIR)/u-boot.lds
diff --git a/arch/nds32/lib/Makefile b/arch/nds32/lib/Makefile
new file mode 100644
index 0000000..eca4324
--- /dev/null
+++ b/arch/nds32/lib/Makefile
@@ -0,0 +1,52 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+#
+# Copyright (C) 2011 Andes Technology Corporation
+# Shawn Lin, Andes Technology Corporation <nobuhiro at andestech.com>
+# Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(ARCH).o
+
+OBJS	:= board.o bootm.o interrupts.o
+
+all:	$(LIB)
+
+$(LIB):	$(OBJS) $(SOBJS)
+	$(AR) crv $@ $^
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak .depend
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/nds32/lib/board.c b/arch/nds32/lib/board.c
new file mode 100644
index 0000000..6ed4194
--- /dev/null
+++ b/arch/nds32/lib/board.c
@@ -0,0 +1,346 @@
+/*
+ * (C) Copyright 2002-2006
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Shawn Lin, Andes Technology Corporation <nobuhiro at andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <malloc.h>
+#include <stdio_dev.h>
+#include <timestamp.h>
+#include <version.h>
+#include <net.h>
+#include <serial.h>
+#include <nand.h>
+#include <onenand_uboot.h>
+#include <mmc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern ulong __bss_end;
+ulong monitor_flash_len;
+
+#ifndef CONFIG_IDENT_STRING
+#define CONFIG_IDENT_STRING ""
+#endif
+
+const char version_string[] =
+	U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")"CONFIG_IDENT_STRING;
+
+/*
+ * Init Utilities
+ */
+
+#if !defined(CONFIG_BAUDRATE)
+#define CONFIG_BAUDRATE 38400
+#endif
+static int init_baudrate(void)
+{
+	char tmp[64];	/* long enough for environment variables */
+	int i = getenv_f("baudrate", tmp, sizeof(tmp));
+
+	gd->bd->bi_baudrate = gd->baudrate = (i > 0)
+			? (int) simple_strtoul(tmp, NULL, 10)
+			: CONFIG_BAUDRATE;
+
+	return 0;
+}
+
+/*
+ * WARNING: this code looks "cleaner" than the PowerPC version, but
+ * has the disadvantage that you either get nothing, or everything.
+ * On PowerPC, you might see "DRAM: " before the system hangs - which
+ * gives a simple yet clear indication which part of the
+ * initialization if failing.
+ */
+static int display_dram_config(void)
+{
+	int i;
+
+#ifdef DEBUG
+	puts("RAM Configuration:\n");
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+		printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
+		print_size(gd->bd->bi_dram[i].size, "\n");
+	}
+#else
+	ulong size = 0;
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
+		size += gd->bd->bi_dram[i].size;
+
+	puts("DRAM:  ");
+	print_size(size, "\n");
+#endif
+
+	return 0;
+}
+
+#ifndef CONFIG_SYS_NO_FLASH
+static void display_flash_config(ulong size)
+{
+	puts("Flash: ");
+	print_size(size, "\n");
+}
+#endif /* CONFIG_SYS_NO_FLASH */
+
+#if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
+#include <pci.h>
+static int nds32_pci_init(void)
+{
+	pci_init();
+	return 0;
+}
+#endif /* CONFIG_CMD_PCI || CONFIG_PCI */
+
+#if defined(CONFIG_PMU) || defined(CONFIG_PCU)
+static int pmu_init(void)
+{
+#if defined(CONFIG_FTPMU010_POWER)
+#ifdef __NDS32_N1213_43U1H__	/* AG101: internal definition in toolchain */
+	ftpmu010_sdram_clk_disable(CONFIG_SYS_FTPMU010_PDLLCR0_HCLKOUTDIS);
+	ftpmu010_mfpsr_select_dev(FTPMU010_MFPSR_AC97CLKSEL);
+	ftpmu010_sdramhtc_set(CONFIG_SYS_FTPMU010_SDRAMHTC);
+#endif	/* __NDS32_N1213_43U1H__ */
+#endif
+	return 0;
+}
+#endif
+
+/*
+ * Breathe some life into the board...
+ *
+ * Initialize a serial port as console, and carry out some hardware
+ * tests.
+ *
+ * The first part of initialization is running from Flash memory;
+ * its main purpose is to initialize the RAM so that we
+ * can relocate the monitor code to RAM.
+ */
+
+/*
+ * All attempts to come up with a "common" initialization sequence
+ * that works for all boards and architectures failed: some of the
+ * requirements are just _too_ different. To get rid of the resulting
+ * mess of board dependent #ifdef'ed code we now make the whole
+ * initialization sequence configurable to the user.
+ *
+ * The requirements for any new initalization function is simple: it
+ * receives a pointer to the "global data" structure as it's only
+ * argument, and returns an integer return code, where 0 means
+ * "continue" and != 0 means "fatal error, hang the system".
+ */
+typedef int (init_fnc_t)(void);
+
+init_fnc_t *init_sequence[] = {
+#if defined(CONFIG_ARCH_CPU_INIT)
+	arch_cpu_init,		/* basic arch cpu dependent setup */
+#endif
+#if defined(CONFIG_PMU) || defined(CONFIG_PCU)
+	pmu_init,
+#endif
+	board_init,		/* basic board dependent setup */
+#if defined(CONFIG_USE_IRQ)
+	interrupt_init,		/* set up exceptions */
+#endif
+	timer_init,		/* initialize timer */
+	env_init,		/* initialize environment */
+	init_baudrate,		/* initialze baudrate settings */
+	serial_init,		/* serial communications setup */
+	console_init_f,		/* stage 1 init of console */
+#if defined(CONFIG_DISPLAY_BOARDINFO)
+	checkboard,		/* display board info */
+#endif
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
+	init_func_i2c,
+#endif
+	dram_init,		/* configure available RAM banks */
+#if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
+	nds32_pci_init,
+#endif
+	display_dram_config,
+	NULL,
+};
+
+void start_andesboot(void)
+{
+	init_fnc_t **init_fnc_ptr;
+	char *s;
+#if defined(CONFIG_VFD) || defined(CONFIG_LCD)
+	unsigned long addr;
+#endif
+
+	/* Pointer is writable since we allocated a register for it */
+	gd = (gd_t *)(_andesboot_start - CONFIG_SYS_MALLOC_LEN - sizeof(gd_t));
+	/* compiler optimization barrier needed for GCC >= 3.4 */
+	__asm__ __volatile__("" : : : "memory");
+
+	memset((void *)gd, 0, sizeof(gd_t));
+	gd->bd = (bd_t *)((char *)gd - sizeof(bd_t));
+	memset(gd->bd, 0, sizeof(bd_t));
+
+	gd->flags |= GD_FLG_RELOC;
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		if ((*init_fnc_ptr)() != 0)
+			hang();
+	}
+
+	/* andesboot_start is defined in the board-specific linker script */
+	mem_malloc_init(_andesboot_start - CONFIG_SYS_MALLOC_LEN,
+			CONFIG_SYS_MALLOC_LEN);
+
+#ifndef CONFIG_SYS_NO_FLASH
+	/* configure available FLASH banks */
+	gd->bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
+	gd->bd->bi_flashsize = flash_init();
+	gd->bd->bi_flashoffset = CONFIG_SYS_FLASH_BASE + gd->bd->bi_flashsize;
+
+	if (gd->bd->bi_flashsize)
+			display_flash_config(gd->bd->bi_flashsize);
+#endif /* CONFIG_SYS_NO_FLASH */
+
+#ifdef CONFIG_VFD
+#	ifndef PAGE_SIZE
+#	  define PAGE_SIZE 4096
+#	endif
+	/*
+	 * reserve memory for VFD display (always full pages)
+	 */
+	/* bss_end is defined in the board-specific linker script */
+	addr = (__bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+	vfd_setmem(addr);
+	gd->fb_base = addr;
+#endif /* CONFIG_VFD */
+
+#ifdef CONFIG_LCD
+	/* board init may have inited fb_base */
+	if (!gd->fb_base) {
+#		ifndef PAGE_SIZE
+#		  define PAGE_SIZE 4096
+#		endif
+		/*
+		 * reserve memory for LCD display (always full pages)
+		 */
+		/* bss_end is defined in the board-specific linker script */
+		addr = (__bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+		lcd_setmem(addr);
+		gd->fb_base = addr;
+	}
+#endif /* CONFIG_LCD */
+
+#if defined(CONFIG_CMD_NAND)
+	puts("NAND:  ");
+	nand_init();		/* go init the NAND */
+#endif
+
+#if defined(CONFIG_CMD_ONENAND)
+	onenand_init();
+#endif
+
+	/* initialize environment */
+	env_relocate();
+
+#ifdef CONFIG_VFD
+	/* must do this after the framebuffer is allocated */
+	drv_vfd_init();
+#endif /* CONFIG_VFD */
+
+#ifdef CONFIG_SERIAL_MULTI
+	serial_initialize();
+#endif
+
+	/* IP Address */
+	gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr");
+
+	stdio_init();	/* get the devices list going. */
+
+	jumptable_init();
+
+#if defined(CONFIG_API)
+	/* Initialize API */
+	api_init();
+#endif
+
+	console_init_r();	/* fully init console as a device */
+
+#if defined(CONFIG_ARCH_MISC_INIT)
+	/* miscellaneous arch dependent initialisations */
+	arch_misc_init();
+#endif
+#if defined(CONFIG_MISC_INIT_R)
+	/* miscellaneous platform dependent initialisations */
+	misc_init_r();
+#endif
+
+	/* enable exceptions */
+	enable_interrupts();
+
+	/* Perform network card initialisation if necessary */
+
+	/* Initialize from environment */
+	s = getenv("loadaddr");
+	if (s != NULL)
+		load_addr = simple_strtoul(s, NULL, 16);
+
+#if defined(CONFIG_CMD_NET)
+	s = getenv("bootfile");
+	if (s != NULL)
+		copy_filename(BootFile, s, sizeof(BootFile));
+#endif
+
+#ifdef BOARD_LATE_INIT
+	board_late_init();
+#endif
+
+#ifdef CONFIG_GENERIC_MMC
+	puts("MMC:   ");
+	mmc_initialize(gd->bd);
+#endif
+
+#if defined(CONFIG_CMD_NET)
+#if defined(CONFIG_NET_MULTI)
+	puts("Net:   ");
+#endif
+	eth_initialize(gd->bd);
+#if defined(CONFIG_RESET_PHY_R)
+	debug("Reset Ethernet PHY\n");
+	reset_phy();
+#endif
+#endif
+	/* main_loop() can return to retry autoboot, if so just run it again. */
+	for (;;)
+		main_loop();
+
+	/* NOTREACHED - no way out of command loop except booting */
+}
+
+void hang(void)
+{
+	puts("### ERROR ### Please RESET the board ###\n");
+	for (;;)
+		;
+}
diff --git a/arch/nds32/lib/bootm.c b/arch/nds32/lib/bootm.c
new file mode 100644
index 0000000..b0a5a0d
--- /dev/null
+++ b/arch/nds32/lib/bootm.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Shawn Lin, Andes Technology Corporation <nobuhiro at andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307	 USA
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <image.h>
+#include <u-boot/zlib.h>
+#include <asm/byteorder.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
+	defined(CONFIG_CMDLINE_TAG) || \
+	defined(CONFIG_INITRD_TAG) || \
+	defined(CONFIG_SERIAL_TAG) || \
+	defined(CONFIG_REVISION_TAG)
+static void setup_start_tag(bd_t *bd);
+
+# ifdef CONFIG_SETUP_MEMORY_TAGS
+static void setup_memory_tags(bd_t *bd);
+# endif
+static void setup_commandline_tag(bd_t *bd, char *commandline);
+
+# ifdef CONFIG_INITRD_TAG
+static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
+# endif
+static void setup_end_tag(bd_t *bd);
+
+static struct tag *params;
+#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
+
+int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+{
+	bd_t	*bd = gd->bd;
+	char	*s;
+	int	machid = bd->bi_arch_number;
+	void	(*theKernel)(int zero, int arch, uint params);
+
+#ifdef CONFIG_CMDLINE_TAG
+	char *commandline = getenv("bootargs");
+#endif
+
+	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
+		return 1;
+
+	theKernel = (void (*)(int, int, uint))images->ep;
+
+	s = getenv("machid");
+	if (s) {
+		machid = simple_strtoul(s, NULL, 16);
+		printf("Using machid 0x%x from environment\n", machid);
+	}
+
+	show_boot_progress(15);
+
+	debug("## Transferring control to Linux (at address %08lx) ...\n",
+	       (ulong)theKernel);
+
+#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
+	defined(CONFIG_CMDLINE_TAG) || \
+	defined(CONFIG_INITRD_TAG) || \
+	defined(CONFIG_SERIAL_TAG) || \
+	defined(CONFIG_REVISION_TAG)
+	setup_start_tag(bd);
+#ifdef CONFIG_SERIAL_TAG
+	setup_serial_tag(&params);
+#endif
+#ifdef CONFIG_REVISION_TAG
+	setup_revision_tag(&params);
+#endif
+#ifdef CONFIG_SETUP_MEMORY_TAGS
+	setup_memory_tags(bd);
+#endif
+#ifdef CONFIG_CMDLINE_TAG
+	setup_commandline_tag(bd, commandline);
+#endif
+#ifdef CONFIG_INITRD_TAG
+	if (images->rd_start && images->rd_end)
+		setup_initrd_tag(bd, images->rd_start, images->rd_end);
+#endif
+	setup_end_tag(bd);
+#endif
+
+	/* we assume that the kernel is in place */
+	printf("\nStarting kernel ...\n\n");
+
+#ifdef CONFIG_USB_DEVICE
+	{
+		extern void udc_disconnect(void);
+		udc_disconnect();
+	}
+#endif
+
+	cleanup_before_linux();
+
+	theKernel(0, machid, bd->bi_boot_params);
+	/* does not return */
+
+	return 1;
+}
+
+
+#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
+	defined(CONFIG_CMDLINE_TAG) || \
+	defined(CONFIG_INITRD_TAG) || \
+	defined(CONFIG_SERIAL_TAG) || \
+	defined(CONFIG_REVISION_TAG)
+static void setup_start_tag(bd_t *bd)
+{
+	params = (struct tag *)bd->bi_boot_params;
+
+	params->hdr.tag = ATAG_CORE;
+	params->hdr.size = tag_size(tag_core);
+
+	params->u.core.flags = 0;
+	params->u.core.pagesize = 0;
+	params->u.core.rootdev = 0;
+
+	params = tag_next(params);
+}
+
+
+#ifdef CONFIG_SETUP_MEMORY_TAGS
+static void setup_memory_tags(bd_t *bd)
+{
+	int i;
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+		params->hdr.tag = ATAG_MEM;
+		params->hdr.size = tag_size(tag_mem32);
+
+		params->u.mem.start = bd->bi_dram[i].start;
+		params->u.mem.size = bd->bi_dram[i].size;
+
+		params = tag_next(params);
+	}
+}
+#endif /* CONFIG_SETUP_MEMORY_TAGS */
+
+
+static void setup_commandline_tag(bd_t *bd, char *commandline)
+{
+	char *p;
+
+	if (!commandline)
+		return;
+
+	/* eat leading white space */
+	for (p = commandline; *p == ' '; p++)
+		;
+
+	/* skip non-existent command lines so the kernel will still
+	 * use its default command line.
+	 */
+	if (*p == '\0')
+		return;
+
+	params->hdr.tag = ATAG_CMDLINE;
+	params->hdr.size =
+		(sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
+
+	strcpy(params->u.cmdline.cmdline, p)
+		;
+
+	params = tag_next(params);
+}
+
+
+#ifdef CONFIG_INITRD_TAG
+static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
+{
+	/* an ATAG_INITRD node tells the kernel where the compressed
+	 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
+	 */
+	params->hdr.tag = ATAG_INITRD2;
+	params->hdr.size = tag_size(tag_initrd);
+
+	params->u.initrd.start = initrd_start;
+	params->u.initrd.size = initrd_end - initrd_start;
+
+	params = tag_next(params);
+}
+#endif /* CONFIG_INITRD_TAG */
+
+#ifdef CONFIG_SERIAL_TAG
+void setup_serial_tag(struct tag **tmp)
+{
+	struct tag *params = *tmp;
+	struct tag_serialnr serialnr;
+	void get_board_serial(struct tag_serialnr *serialnr);
+
+	get_board_serial(&serialnr);
+	params->hdr.tag = ATAG_SERIAL;
+	params->hdr.size = tag_size(tag_serialnr);
+	params->u.serialnr.low = serialnr.low;
+	params->u.serialnr.high = serialnr.high;
+	params = tag_next(params);
+	*tmp = params;
+}
+#endif
+
+#ifdef CONFIG_REVISION_TAG
+void setup_revision_tag(struct tag **in_params)
+{
+	u32 rev = 0;
+	u32 get_board_rev(void);
+
+	rev = get_board_rev();
+	params->hdr.tag = ATAG_REVISION;
+	params->hdr.size = tag_size(tag_revision);
+	params->u.revision.rev = rev;
+	params = tag_next(params);
+}
+#endif  /* CONFIG_REVISION_TAG */
+
+
+static void setup_end_tag(bd_t *bd)
+{
+	params->hdr.tag = ATAG_NONE;
+	params->hdr.size = 0;
+}
+
+#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
diff --git a/arch/nds32/lib/interrupts.c b/arch/nds32/lib/interrupts.c
new file mode 100644
index 0000000..6c3b0f0
--- /dev/null
+++ b/arch/nds32/lib/interrupts.c
@@ -0,0 +1,131 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu at sysgo.de>
+ *
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Shawn Lin, Andes Technology Corporation <nobuhiro at andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/ptregs.h>
+#include <asm/system.h>
+#undef INTERRUPT_MODE
+
+extern void reset_cpu(ulong addr);
+
+static int int_flag;
+
+int irq_flags;		/* needed by asm-nds32/system.h */
+
+int GIE_STATUS(void)
+{
+	int ret;
+
+	__asm__ __volatile__ (
+		"mfsr	$p0, $psw\n\t"
+		"andi	%0, %0, 0x1\n\t"
+		: "=r" (ret)
+		:
+		: "memory"
+	);
+	return ret;
+}
+
+#ifdef CONFIG_USE_INTERRUPT
+
+/* enable interrupts */
+void enable_interrupts(void)
+{
+	local_irq_restore(int_flag);
+}
+
+/*
+ * disable interrupts
+ * Return TRUE if GIE is enabled before we disable it.
+ */
+int disable_interrupts(void)
+{
+
+	int gie_ori_status;
+
+	gie_ori_status = GIE_STATUS();
+
+	local_irq_save(int_flag);
+
+	return gie_ori_status;
+}
+#endif
+
+void bad_mode(void)
+{
+	panic("Resetting CPU ...\n");
+	reset_cpu(0);
+}
+
+void show_regs(struct pt_regs *regs)
+{
+	const char *processor_modes[] = {"USER", "SuperUser" , "HyperVisor"};
+
+	printf("\n");
+	printf("pc : [<%08lx>]	sp: [<%08lx>]\n"
+		"ra : %08lx  gp : %08lx  fp : %08lx\n",
+		regs->PC, regs->SP, regs->RA, regs->GP, regs->FP);
+	printf("D1H: %08lx  D1L: %08lx  D0H: %08lx  D0L: %08lx\n",
+		regs->D1HI, regs->D1LO, regs->D0HI, regs->D0LO);
+	printf("r27: %08lx  r26: %08lx  r25: %08lx  r24: %08lx\n",
+		regs->R27, regs->R26, regs->R25, regs->R24);
+	printf("r23: %08lx  r22: %08lx  r21: %08lx  r20: %08lx\n",
+		regs->R23, regs->R22, regs->R21, regs->R20);
+	printf("r19: %08lx  r18: %08lx  r17: %08lx  r16: %08lx\n",
+		regs->R19, regs->R18, regs->R17, regs->R16);
+	printf("r15: %08lx  r14: %08lx  r13: %08lx  r12: %08lx\n",
+		regs->R15, regs->R14, regs->R13, regs->R12);
+	printf("r11: %08lx  r10: %08lx  r9 : %08lx  r8 : %08lx\n",
+		regs->R11, regs->R10, regs->R9, regs->R8);
+	printf("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
+		regs->R7, regs->R6, regs->R5, regs->R4);
+	printf("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
+		regs->R3, regs->R2, regs->R1, regs->R0);
+	printf("  Interrupts %s  Mode %s\n",
+		interrupts_enabled(regs) ? "on" : "off",
+		processor_modes[processor_mode(regs)]);
+}
+
+void do_interruption(struct pt_regs *pt_regs, int EVIC_num)
+{
+	const char *interruption_type[] = {
+		"Reset",
+		"TLB Fill",
+		"TLB Not Present",
+		"TLB Misc",
+		"VLPT Miss",
+		"Cache Parity Error",
+		"Debug",
+		"General Exception",
+		"External Interrupt"
+	};
+
+	printf("%s\n", interruption_type[EVIC_num]);
+	show_regs(pt_regs);
+	bad_mode();
+}
-- 
1.7.3.5