9 files changed, 580 insertions, 0 deletions
diff --git a/arch/nios2/config.mk b/arch/nios2/config.mk
new file mode 100644
index 000000000..be4063928
--- /dev/null
+++ b/arch/nios2/config.mk
@@ -0,0 +1,30 @@
+#
+# (C) Copyright 2004
+# Psyent Corporation <www.psyent.com>
+# Scott McNutt <smcnutt@psyent.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 ?= nios2-elf-
+
+STANDALONE_LOAD_ADDR = 0x02000000 -L $(gcclibdir)
+
+PLATFORM_CPPFLAGS += -DCONFIG_NIOS2 -D__NIOS2__
+PLATFORM_CPPFLAGS += -ffixed-r15 -G0
diff --git a/arch/nios2/lib/Makefile b/arch/nios2/lib/Makefile
new file mode 100644
index 000000000..b69bc3885
--- /dev/null
+++ b/arch/nios2/lib/Makefile
@@ -0,0 +1,49 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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).a
+
+SOBJS-y	+= cache.o
+
+COBJS-y	+= board.o
+COBJS-y	+= bootm.o
+COBJS-y	+= divmod.o
+COBJS-y	+= mult.o
+COBJS-y	+= time.o
+
+SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/nios2/lib/board.c b/arch/nios2/lib/board.c
new file mode 100644
index 000000000..8ec66a354
--- /dev/null
+++ b/arch/nios2/lib/board.c
@@ -0,0 +1,164 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <stdio_dev.h>
+#include <watchdog.h>
+#include <malloc.h>
+#include <net.h>
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#endif
+#if defined(CONFIG_SYS_NIOS_EPCSBASE)
+#include <nios2-epcs.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * 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 dependend #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);
+
+
+/************************************************************************
+ * Initialization sequence						*
+ ***********************************************************************/
+
+init_fnc_t *init_sequence[] = {
+
+#if defined(CONFIG_BOARD_EARLY_INIT_F)
+	board_early_init_f,	/* Call board-specific init code early.*/
+#endif
+#if defined(CONFIG_SYS_NIOS_EPCSBASE)
+	epcs_reset,
+#endif
+
+	env_init,
+	serial_init,
+	console_init_f,
+	display_options,
+	checkcpu,
+	checkboard,
+	NULL,			/* Terminate this list */
+};
+
+
+/***********************************************************************/
+void board_init (void)
+{
+	bd_t *bd;
+	init_fnc_t **init_fnc_ptr;
+
+	/* Pointer is writable since we allocated a register for it.
+	 * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
+	 */
+	gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
+	/* compiler optimization barrier needed for GCC >= 3.4 */
+	__asm__ __volatile__("": : :"memory");
+
+	memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
+
+	gd->bd = (bd_t *)(gd+1);	/* At end of global data */
+	gd->baudrate = CONFIG_BAUDRATE;
+	gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
+
+	bd = gd->bd;
+	bd->bi_memstart	= CONFIG_SYS_SDRAM_BASE;
+	bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
+	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
+#if	defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
+	bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
+	bd->bi_sramsize	= CONFIG_SYS_SRAM_SIZE;
+#endif
+	bd->bi_baudrate	= CONFIG_BAUDRATE;
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		WATCHDOG_RESET ();
+		if ((*init_fnc_ptr) () != 0) {
+			hang ();
+		}
+	}
+
+	WATCHDOG_RESET ();
+
+	/* The Malloc area is immediately below the monitor copy in RAM */
+	mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
+
+	WATCHDOG_RESET ();
+	bd->bi_flashsize = flash_init();
+
+	WATCHDOG_RESET ();
+	env_relocate();
+
+	bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
+
+	WATCHDOG_RESET ();
+	stdio_init();
+	jumptable_init();
+	console_init_r();
+
+	WATCHDOG_RESET ();
+	interrupt_init ();
+
+#if defined(CONFIG_BOARD_LATE_INIT)
+	board_late_init ();
+#endif
+
+#if defined(CONFIG_CMD_NET)
+#if defined(CONFIG_NET_MULTI)
+	puts ("Net:   ");
+#endif
+	eth_initialize (bd);
+#endif
+
+	/* main_loop */
+	for (;;) {
+		WATCHDOG_RESET ();
+		main_loop ();
+	}
+}
+
+
+/***********************************************************************/
+
+void hang (void)
+{
+	disable_interrupts ();
+	puts("### ERROR ### Please reset board ###\n");
+	for (;;);
+}
diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c
new file mode 100644
index 000000000..5d25edf80
--- /dev/null
+++ b/arch/nios2/lib/bootm.c
@@ -0,0 +1,52 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <asm/byteorder.h>
+#include <asm/cache.h>
+
+#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
+
+int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+{
+	void (*kernel)(int, int, int, char *) = (void *)images->ep;
+	char *commandline = getenv("bootargs");
+	ulong initrd_start = images->rd_start;
+	ulong initrd_end = images->rd_end;
+
+	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
+		return 1;
+
+	/* flushes data and instruction caches before calling the kernel */
+	disable_interrupts();
+	flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
+	flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
+
+	debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
+	debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
+	kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
+	/* does not return */
+
+	return 1;
+}
diff --git a/arch/nios2/lib/cache.S b/arch/nios2/lib/cache.S
new file mode 100644
index 000000000..ee3b4b79b
--- /dev/null
+++ b/arch/nios2/lib/cache.S
@@ -0,0 +1,74 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <config.h>
+
+	.text
+
+	.global flush_dcache
+
+flush_dcache:
+	add	r5, r5, r4
+	movhi	r8, %hi(CONFIG_SYS_DCACHELINE_SIZE)
+	ori	r8, r8, %lo(CONFIG_SYS_DCACHELINE_SIZE)
+0:	flushd	0(r4)
+	add	r4, r4, r8
+	bltu	r4, r5, 0b
+	ret
+
+
+	.global flush_icache
+
+flush_icache:
+	add	r5, r5, r4
+	movhi	r8, %hi(CONFIG_SYS_ICACHELINE_SIZE)
+	ori	r8, r8, %lo(CONFIG_SYS_ICACHELINE_SIZE)
+1:	flushi	r4
+	add	r4, r4, r8
+	bltu	r4, r5, 1b
+	ret
+
+	.global flush_cache
+
+flush_cache:
+	add	r5, r5, r4
+	mov	r9, r4
+	mov	r10, r5
+
+	movhi	r8, %hi(CONFIG_SYS_DCACHELINE_SIZE)
+	ori	r8, r8, %lo(CONFIG_SYS_DCACHELINE_SIZE)
+0:	flushd	0(r4)
+	add	r4, r4, r8
+	bltu	r4, r5, 0b
+
+	mov	r4, r9
+	mov	r5, r10
+	movhi	r8, %hi(CONFIG_SYS_ICACHELINE_SIZE)
+	ori	r8, r8, %lo(CONFIG_SYS_ICACHELINE_SIZE)
+1:	flushi	r4
+	add	r4, r4, r8
+	bltu	r4, r5, 1b
+
+	sync
+	flushp
+	ret
diff --git a/arch/nios2/lib/divmod.c b/arch/nios2/lib/divmod.c
new file mode 100644
index 000000000..3c7e71e97
--- /dev/null
+++ b/arch/nios2/lib/divmod.c
@@ -0,0 +1,101 @@
+/*
+ * This file is part of GNU CC.
+ *
+ * GNU CC 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, or (at your
+ * option) any later version.
+ *
+ * GNU CC 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 GNU CC; see the file COPYING.  If not, write
+ * to the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#include "math.h"
+
+USItype udivmodsi4 (USItype num, USItype den, word_type modwanted)
+{
+	USItype bit = 1;
+	USItype res = 0;
+
+	while (den < num && bit && !(den & (1L << 31))) {
+		den <<= 1;
+		bit <<= 1;
+	}
+	while (bit) {
+		if (num >= den) {
+			num -= den;
+			res |= bit;
+		}
+		bit >>= 1;
+		den >>= 1;
+	}
+	if (modwanted)
+		return num;
+	return res;
+}
+
+
+SItype __divsi3 (SItype a, SItype b)
+{
+	word_type neg = 0;
+	SItype res;
+
+	if (a < 0) {
+		a = -a;
+		neg = !neg;
+	}
+
+	if (b < 0) {
+		b = -b;
+		neg = !neg;
+	}
+
+	res = udivmodsi4 (a, b, 0);
+
+	if (neg)
+		res = -res;
+
+	return res;
+}
+
+
+SItype __modsi3 (SItype a, SItype b)
+{
+	word_type neg = 0;
+	SItype res;
+
+	if (a < 0) {
+		a = -a;
+		neg = 1;
+	}
+
+	if (b < 0)
+		b = -b;
+
+	res = udivmodsi4 (a, b, 1);
+
+	if (neg)
+		res = -res;
+
+	return res;
+}
+
+
+SItype __udivsi3 (SItype a, SItype b)
+{
+	return udivmodsi4 (a, b, 0);
+}
+
+
+SItype __umodsi3 (SItype a, SItype b)
+{
+	return udivmodsi4 (a, b, 1);
+}
diff --git a/arch/nios2/lib/math.h b/arch/nios2/lib/math.h
new file mode 100644
index 000000000..f0aed8edc
--- /dev/null
+++ b/arch/nios2/lib/math.h
@@ -0,0 +1,16 @@
+#define BITS_PER_UNIT	8
+
+typedef	 int HItype			__attribute__ ((mode (HI)));
+typedef unsigned int UHItype		__attribute__ ((mode (HI)));
+
+typedef		 int SItype		__attribute__ ((mode (SI)));
+typedef unsigned int USItype		__attribute__ ((mode (SI)));
+
+typedef int word_type			__attribute__ ((mode (__word__)));
+
+struct SIstruct {HItype low, high;};
+
+typedef union {
+	struct SIstruct s;
+	SItype ll;
+} SIunion;
diff --git a/arch/nios2/lib/mult.c b/arch/nios2/lib/mult.c
new file mode 100644
index 000000000..ec8139ed5
--- /dev/null
+++ b/arch/nios2/lib/mult.c
@@ -0,0 +1,56 @@
+/*
+ * This file is part of GNU CC.
+ *
+ * GNU CC 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, or (at your
+ * option) any later version.
+ *
+ * GNU CC 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 GNU CC; see the file COPYING.  If not, write
+ * to the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#include <common.h>
+
+#if !defined(CONFIG_SYS_NIOS_MULT_HW) && !defined(CONFIG_SYS_NIOS_MULT_MSTEP)
+
+#include "math.h"
+
+USItype __mulsi3 (USItype a, USItype b)
+{
+	USItype c = 0;
+
+	while (a != 0) {
+		if (a & 1)
+			c += b;
+		a >>= 1;
+		b <<= 1;
+	}
+
+	return c;
+}
+
+
+UHItype __mulhi3 (UHItype a, UHItype b)
+{
+	UHItype c = 0;
+
+	while (a != 0) {
+		if (a & 1)
+			c += b;
+		a >>= 1;
+		b <<= 1;
+	}
+
+	return c;
+}
+
+#endif /*!defined(CONFIG_SYS_NIOS_MULT_HW) && !defined(CONFIG_SYS_NIOS_MULT_MSTEP) */
diff --git a/arch/nios2/lib/time.c b/arch/nios2/lib/time.c
new file mode 100644
index 000000000..d5096ee12
--- /dev/null
+++ b/arch/nios2/lib/time.c
@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <watchdog.h>
+
+
+extern void dly_clks( unsigned long ticks );
+
+void __udelay(unsigned long usec)
+{
+	/* The Nios core doesn't have a timebase, so we do our
+	 * best for now and call a low-level loop that counts
+	 * cpu clocks.
+	 */
+	unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
+	dly_clks (cnt);
+}