2 * Copyright (C) 2004-2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/byteorder.h>
27 #include <asm/addrspace.h>
29 #include <asm/setup.h>
30 #include <asm/arch/clk.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 /* CPU-specific hook to allow flushing of caches, etc. */
35 extern void prepare_to_boot(void);
37 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
39 static struct tag *setup_start_tag(struct tag *params)
41 params->hdr.tag = ATAG_CORE;
42 params->hdr.size = tag_size(tag_core);
44 params->u.core.flags = 0;
45 params->u.core.pagesize = 4096;
46 params->u.core.rootdev = 0;
48 return tag_next(params);
51 static struct tag *setup_memory_tags(struct tag *params)
56 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
57 params->hdr.tag = ATAG_MEM;
58 params->hdr.size = tag_size(tag_mem_range);
60 params->u.mem_range.addr = bd->bi_dram[i].start;
61 params->u.mem_range.size = bd->bi_dram[i].size;
63 params = tag_next(params);
69 static struct tag *setup_commandline_tag(struct tag *params, char *cmdline)
74 /* eat leading white space */
75 while (*cmdline == ' ') cmdline++;
78 * Don't include tags for empty command lines; let the kernel
79 * use its default command line.
84 params->hdr.tag = ATAG_CMDLINE;
86 (sizeof (struct tag_header) + strlen(cmdline) + 1 + 3) >> 2;
87 strcpy(params->u.cmdline.cmdline, cmdline);
89 return tag_next(params);
92 static struct tag *setup_ramdisk_tag(struct tag *params,
93 unsigned long rd_start,
96 if (rd_start == rd_end)
99 params->hdr.tag = ATAG_RDIMG;
100 params->hdr.size = tag_size(tag_mem_range);
102 params->u.mem_range.addr = rd_start;
103 params->u.mem_range.size = rd_end - rd_start;
105 return tag_next(params);
108 static struct tag *setup_clock_tags(struct tag *params)
110 params->hdr.tag = ATAG_CLOCK;
111 params->hdr.size = tag_size(tag_clock);
112 params->u.clock.clock_id = ACLOCK_BOOTCPU;
113 params->u.clock.clock_flags = 0;
114 params->u.clock.clock_hz = gd->cpu_hz;
116 #ifdef CONFIG_AT32AP7000
118 * New kernels don't need this, but we should be backwards
119 * compatible for a while...
121 params = tag_next(params);
123 params->hdr.tag = ATAG_CLOCK;
124 params->hdr.size = tag_size(tag_clock);
125 params->u.clock.clock_id = ACLOCK_HSB;
126 params->u.clock.clock_flags = 0;
127 params->u.clock.clock_hz = get_hsb_clk_rate();
130 return tag_next(params);
133 static struct tag *setup_ethernet_tag(struct tag *params,
134 char *addr, int index)
139 params->hdr.tag = ATAG_ETHERNET;
140 params->hdr.size = tag_size(tag_ethernet);
142 params->u.ethernet.mac_index = index;
143 params->u.ethernet.mii_phy_addr = gd->bd->bi_phy_id[index];
146 for (i = 0; i < 6; i++) {
147 params->u.ethernet.hw_address[i] = simple_strtoul(s, &e, 16);
151 return tag_next(params);
154 static struct tag *setup_ethernet_tags(struct tag *params)
156 char name[16] = "ethaddr";
163 params = setup_ethernet_tag(params, addr, i);
164 sprintf(name, "eth%daddr", ++i);
170 static void setup_end_tag(struct tag *params)
172 params->hdr.tag = ATAG_NONE;
173 params->hdr.size = 0;
176 void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
177 bootm_headers_t *images)
179 ulong initrd_start, initrd_end;
180 void (*theKernel)(int magic, void *tagtable);
181 struct tag *params, *params_start;
182 char *commandline = getenv("bootargs");
185 theKernel = (void *)images->ep;
187 ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_AVR32,
188 &initrd_start, &initrd_end);
192 show_boot_progress (15);
194 params = params_start = (struct tag *)gd->bd->bi_boot_params;
195 params = setup_start_tag(params);
196 params = setup_memory_tags(params);
198 params = setup_ramdisk_tag(params,
199 PHYSADDR(initrd_start),
200 PHYSADDR(initrd_end));
202 params = setup_commandline_tag(params, commandline);
203 params = setup_clock_tags(params);
204 params = setup_ethernet_tags(params);
205 setup_end_tag(params);
207 printf("\nStarting kernel at %p (params at %p)...\n\n",
208 theKernel, params_start);
212 theKernel(ATAG_MAGIC, params_start);
213 /* does not return */
217 do_reset (cmdtp, flag, argc, argv);