Add AVR32 architecture support

Patch by Haavard Skinnemoen, 6 Sep 2006 16:23:02 +0200

This patch adds common infrastructure code for the Atmel AVR32
architecture. See doc/README.AVR32 for details.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 175 insertions, 0 deletions

diff --git a/lib_avr32/board.c b/lib_avr32/board.c
new file mode 100644
index 0000000000..02c106b80e
--- /dev/null
+++ b/lib_avr32/board.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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 <devices.h>
+#include <version.h>
+#include <net.h>
+
+#include <asm/initcalls.h>
+#include <asm/sections.h>
+
+#ifndef CONFIG_IDENT_STRING
+#define CONFIG_IDENT_STRING ""
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const char version_string[] =
+	U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
+
+unsigned long monitor_flash_len;
+
+/*
+ * Begin and end of memory area for malloc(), and current "brk"
+ */
+static unsigned long mem_malloc_start = 0;
+static unsigned long mem_malloc_end = 0;
+static unsigned long mem_malloc_brk = 0;
+
+/* The malloc area is wherever the board wants it to be */
+static void mem_malloc_init(void)
+{
+	mem_malloc_start = CFG_MALLOC_START;
+	mem_malloc_end = CFG_MALLOC_END;
+	mem_malloc_brk = mem_malloc_start;
+
+	printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
+	       mem_malloc_start, mem_malloc_end);
+
+	memset ((void *)mem_malloc_start, 0,
+		mem_malloc_end - mem_malloc_start);
+}
+
+void *sbrk(ptrdiff_t increment)
+{
+	unsigned long old = mem_malloc_brk;
+	unsigned long new = old + increment;
+
+	if ((new < mem_malloc_start) || (new > mem_malloc_end))
+		return NULL;
+
+	mem_malloc_brk = new;
+	return ((void *)old);
+}
+
+static int init_baudrate(void)
+{
+	char tmp[64];
+	int i;
+
+	i = getenv_r("baudrate", tmp, sizeof(tmp));
+	if (i > 0) {
+		gd->baudrate = simple_strtoul(tmp, NULL, 10);
+	} else {
+		gd->baudrate = CONFIG_BAUDRATE;
+	}
+	return 0;
+}
+
+
+static int display_banner (void)
+{
+	printf ("\n\n%s\n\n", version_string);
+	printf ("U-Boot code: %p -> %p  data: %p -> %p\n",
+		_text, _etext, _data, _end);
+	return 0;
+}
+
+void hang(void)
+{
+	for (;;) ;
+}
+
+static int display_dram_config (void)
+{
+	int i;
+
+	puts ("DRAM 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");
+	}
+
+	return 0;
+}
+
+static void display_flash_config (void)
+{
+	puts ("Flash: ");
+	print_size(gd->bd->bi_flashsize, " ");
+	printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
+}
+
+void start_u_boot (void)
+{
+	gd_t gd_data;
+
+	/* Initialize the global data pointer */
+	memset(&gd_data, 0, sizeof(gd_data));
+	gd = &gd_data;
+
+	monitor_flash_len = _edata - _text;
+
+	/* Perform initialization sequence */
+	cpu_init();
+	timer_init();
+	env_init();
+	init_baudrate();
+	serial_init();
+	console_init_f();
+	display_banner();
+
+	board_init_memories();
+	mem_malloc_init();
+
+	gd->bd = malloc(sizeof(bd_t));
+	memset(gd->bd, 0, sizeof(bd_t));
+	gd->bd->bi_baudrate = gd->baudrate;
+	gd->bd->bi_dram[0].start = CFG_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = gd->sdram_size;
+
+	board_init_info();
+	flash_init();
+
+	if (gd->bd->bi_flashsize)
+		display_flash_config();
+	if (gd->bd->bi_dram[0].size)
+		display_dram_config();
+
+	gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
+	if (!gd->bd->bi_boot_params)
+		puts("WARNING: Cannot allocate space for boot parameters\n");
+
+	/* initialize environment */
+	env_relocate();
+
+	devices_init();
+	jumptable_init();
+	console_init_r();
+
+	for (;;) {
+		main_loop();
+	}
+}