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, 315 insertions, 0 deletions

diff --git a/lib_avr32/avr32_linux.c b/lib_avr32/avr32_linux.c
new file mode 100644
index 0000000000..d128dfb53f
--- /dev/null
+++ b/lib_avr32/avr32_linux.c
@@ -0,0 +1,315 @@
+/*
+ * 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 <image.h>
+#include <zlib.h>
+#include <asm/byteorder.h>
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/arch/platform.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+
+/* CPU-specific hook to allow flushing of caches, etc. */
+extern void prepare_to_boot(void);
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+# include <status_led.h>
+# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
+#else
+# define SHOW_BOOT_PROGRESS(arg)
+#endif
+
+extern image_header_t header;		/* from cmd_bootm.c */
+
+static struct tag *setup_start_tag(struct tag *params)
+{
+	params->hdr.tag = ATAG_CORE;
+	params->hdr.size = tag_size(tag_core);
+
+	params->u.core.flags = 0;
+	params->u.core.pagesize = 4096;
+	params->u.core.rootdev = 0;
+
+	return tag_next(params);
+}
+
+static struct tag *setup_memory_tags(struct tag *params)
+{
+	bd_t *bd = gd->bd;
+	int i;
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+		params->hdr.tag = ATAG_MEM;
+		params->hdr.size = tag_size(tag_mem_range);
+
+		params->u.mem_range.addr = bd->bi_dram[i].start;
+		params->u.mem_range.size = bd->bi_dram[i].size;
+
+		params = tag_next(params);
+	}
+
+	return params;
+}
+
+static struct tag *setup_commandline_tag(struct tag *params, char *cmdline)
+{
+	if (!cmdline)
+		return params;
+
+	/* eat leading white space */
+	while (*cmdline == ' ') cmdline++;
+
+	/*
+	 * Don't include tags for empty command lines; let the kernel
+	 * use its default command line.
+	 */
+	if (*cmdline == '\0')
+		return params;
+
+	params->hdr.tag = ATAG_CMDLINE;
+	params->hdr.size =
+		(sizeof (struct tag_header) + strlen(cmdline) + 1 + 3) >> 2;
+	strcpy(params->u.cmdline.cmdline, cmdline);
+
+	return tag_next(params);
+}
+
+static struct tag *setup_ramdisk_tag(struct tag *params,
+				     unsigned long rd_start,
+				     unsigned long rd_end)
+{
+	if (rd_start == rd_end)
+		return params;
+
+	params->hdr.tag = ATAG_RDIMG;
+	params->hdr.size = tag_size(tag_mem_range);
+
+	params->u.mem_range.addr = rd_start;
+	params->u.mem_range.size = rd_end - rd_start;
+
+	return tag_next(params);
+}
+
+static struct tag *setup_clock_tags(struct tag *params)
+{
+	params->hdr.tag = ATAG_CLOCK;
+	params->hdr.size = tag_size(tag_clock);
+	params->u.clock.clock_id = ACLOCK_BOOTCPU;
+	params->u.clock.clock_flags = 0;
+	params->u.clock.clock_hz = gd->cpu_hz;
+
+#ifdef CONFIG_AT32AP7000
+	/*
+	 * New kernels don't need this, but we should be backwards
+	 * compatible for a while...
+	 */
+	params = tag_next(params);
+
+	params->hdr.tag = ATAG_CLOCK;
+	params->hdr.size = tag_size(tag_clock);
+	params->u.clock.clock_id = ACLOCK_HSB;
+	params->u.clock.clock_flags = 0;
+	params->u.clock.clock_hz = pm_get_clock_freq(CLOCK_HSB);
+#endif
+
+	return tag_next(params);
+}
+
+static struct tag *setup_ethernet_tag(struct tag *params,
+				      char *addr, int index)
+{
+	char *s, *e;
+	int i;
+
+	params->hdr.tag = ATAG_ETHERNET;
+	params->hdr.size = tag_size(tag_ethernet);
+
+	params->u.ethernet.mac_index = index;
+	params->u.ethernet.mii_phy_addr = gd->bd->bi_phy_id[index];
+
+	s = addr;
+	for (i = 0; i < 6; i++) {
+		params->u.ethernet.hw_address[i] = simple_strtoul(s, &e, 16);
+		s = e + 1;
+	}
+
+	return tag_next(params);
+}
+
+static struct tag *setup_ethernet_tags(struct tag *params)
+{
+	char name[16] = "ethaddr";
+	char *addr;
+	int i = 0;
+
+	do {
+		addr = getenv(name);
+		if (addr)
+			params = setup_ethernet_tag(params, addr, i);
+		sprintf(name, "eth%daddr", ++i);
+	} while (i < 4);
+
+	return params;
+}
+
+static void setup_end_tag(struct tag *params)
+{
+	params->hdr.tag = ATAG_NONE;
+	params->hdr.size = 0;
+}
+
+void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+		    unsigned long addr, unsigned long *len_ptr, int verify)
+{
+	unsigned long data, len = 0;
+	unsigned long initrd_start, initrd_end;
+	unsigned long image_start, image_end;
+	unsigned long checksum;
+	void (*theKernel)(int magic, void *tagtable);
+	image_header_t *hdr;
+	struct tag *params, *params_start;
+	char *commandline = getenv("bootargs");
+
+	hdr = (image_header_t *)addr;
+	image_start = addr;
+	image_end = addr + hdr->ih_size;
+
+	theKernel = (void *)ntohl(hdr->ih_ep);
+
+	/*
+	 * Check if there is an initrd image
+	 */
+	if (argc >= 3) {
+		SHOW_BOOT_PROGRESS(9);
+
+		addr = simple_strtoul(argv[2], NULL, 16);
+
+		printf("## Loading RAMDISK image at %08lx ...\n", addr);
+
+		memcpy(&header, (char *)addr, sizeof(header));
+		hdr = &header;
+
+		if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+			puts("Bad Magic Number\n");
+			SHOW_BOOT_PROGRESS(-10);
+			do_reset(cmdtp, flag, argc, argv);
+		}
+
+		data = (unsigned long)hdr;
+		len = sizeof(*hdr);
+		checksum = ntohl(hdr->ih_hcrc);
+		hdr->ih_hcrc = 0;
+
+		if (crc32(0, (unsigned char *)data, len) != checksum) {
+			puts("Bad Header Checksum\n");
+			SHOW_BOOT_PROGRESS(-11);
+			do_reset(cmdtp, flag, argc, argv);
+		}
+
+		SHOW_BOOT_PROGRESS(10);
+
+		print_image_hdr(hdr);
+
+		data = addr + sizeof(header);
+		len = ntohl(hdr->ih_size);
+
+		if (verify) {
+			unsigned long csum = 0;
+
+			puts("   Verifying Checksum ... ");
+			csum = crc32(0, (unsigned char *)data, len);
+			if (csum != ntohl(hdr->ih_dcrc)) {
+				puts("Bad Data CRC\n");
+				SHOW_BOOT_PROGRESS(-12);
+				do_reset(cmdtp, flag, argc, argv);
+			}
+			puts("OK\n");
+		}
+
+		SHOW_BOOT_PROGRESS(11);
+
+		if ((hdr->ih_os != IH_OS_LINUX) ||
+		    (hdr->ih_arch != IH_CPU_AVR32) ||
+		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+			puts("Not a Linux/AVR32 RAMDISK image\n");
+			SHOW_BOOT_PROGRESS(-13);
+			do_reset(cmdtp, flag, argc, argv);
+		}
+	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail = ntohl (len_ptr[0]) % 4;
+		int i;
+
+		SHOW_BOOT_PROGRESS (13);
+
+		/* skip kernel length and terminator */
+		data = (ulong) (&len_ptr[2]);
+		/* skip any additional image length fields */
+		for (i = 1; len_ptr[i]; ++i)
+			data += 4;
+		/* add kernel length, and align */
+		data += ntohl (len_ptr[0]);
+		if (tail) {
+			data += 4 - tail;
+		}
+
+		len = ntohl (len_ptr[1]);
+	} else {
+		/* no initrd image */
+		SHOW_BOOT_PROGRESS(14);
+		len = data = 0;
+	}
+
+	if (data) {
+		initrd_start = data;
+		initrd_end = initrd_start + len;
+	} else {
+		initrd_start = 0;
+		initrd_end = 0;
+	}
+
+	SHOW_BOOT_PROGRESS(15);
+
+	params = params_start = (struct tag *)gd->bd->bi_boot_params;
+	params = setup_start_tag(params);
+	params = setup_memory_tags(params);
+	if (initrd_start) {
+		params = setup_ramdisk_tag(params,
+					   PHYSADDR(initrd_start),
+					   PHYSADDR(initrd_end));
+	}
+	params = setup_commandline_tag(params, commandline);
+	params = setup_clock_tags(params);
+	params = setup_ethernet_tags(params);
+	setup_end_tag(params);
+
+	printf("\nStarting kernel at %p (params at %p)...\n\n",
+	       theKernel, params_start);
+
+	prepare_to_boot();
+
+	theKernel(ATAG_MAGIC, params_start);
+}