2 * Copyright (C) 2004-2006 Atmel Corporation
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <u-boot/zlib.h>
10 #include <asm/byteorder.h>
11 #include <asm/arch/addrspace.h>
13 #include <asm/setup.h>
14 #include <asm/arch/clk.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 /* CPU-specific hook to allow flushing of caches, etc. */
19 extern void prepare_to_boot(void);
21 static struct tag *setup_start_tag(struct tag *params)
23 params->hdr.tag = ATAG_CORE;
24 params->hdr.size = tag_size(tag_core);
26 params->u.core.flags = 0;
27 params->u.core.pagesize = 4096;
28 params->u.core.rootdev = 0;
30 return tag_next(params);
33 static struct tag *setup_memory_tags(struct tag *params)
38 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
39 params->hdr.tag = ATAG_MEM;
40 params->hdr.size = tag_size(tag_mem_range);
42 params->u.mem_range.addr = bd->bi_dram[i].start;
43 params->u.mem_range.size = bd->bi_dram[i].size;
45 params = tag_next(params);
51 static struct tag *setup_commandline_tag(struct tag *params, char *cmdline)
56 /* eat leading white space */
57 while (*cmdline == ' ') cmdline++;
60 * Don't include tags for empty command lines; let the kernel
61 * use its default command line.
66 params->hdr.tag = ATAG_CMDLINE;
68 (sizeof (struct tag_header) + strlen(cmdline) + 1 + 3) >> 2;
69 strcpy(params->u.cmdline.cmdline, cmdline);
71 return tag_next(params);
74 static struct tag *setup_ramdisk_tag(struct tag *params,
75 unsigned long rd_start,
78 if (rd_start == rd_end)
81 params->hdr.tag = ATAG_RDIMG;
82 params->hdr.size = tag_size(tag_mem_range);
84 params->u.mem_range.addr = rd_start;
85 params->u.mem_range.size = rd_end - rd_start;
87 return tag_next(params);
90 static struct tag *setup_clock_tags(struct tag *params)
92 params->hdr.tag = ATAG_CLOCK;
93 params->hdr.size = tag_size(tag_clock);
94 params->u.clock.clock_id = ACLOCK_BOOTCPU;
95 params->u.clock.clock_flags = 0;
96 params->u.clock.clock_hz = gd->arch.cpu_hz;
98 #ifdef CONFIG_AT32AP7000
100 * New kernels don't need this, but we should be backwards
101 * compatible for a while...
103 params = tag_next(params);
105 params->hdr.tag = ATAG_CLOCK;
106 params->hdr.size = tag_size(tag_clock);
107 params->u.clock.clock_id = ACLOCK_HSB;
108 params->u.clock.clock_flags = 0;
109 params->u.clock.clock_hz = get_hsb_clk_rate();
112 return tag_next(params);
115 static struct tag *setup_ethernet_tag(struct tag *params,
116 char *addr, int index)
121 params->hdr.tag = ATAG_ETHERNET;
122 params->hdr.size = tag_size(tag_ethernet);
124 params->u.ethernet.mac_index = index;
125 params->u.ethernet.mii_phy_addr = gd->bd->bi_phy_id[index];
128 for (i = 0; i < 6; i++) {
129 params->u.ethernet.hw_address[i] = simple_strtoul(s, &e, 16);
133 return tag_next(params);
136 static struct tag *setup_ethernet_tags(struct tag *params)
138 char name[16] = "ethaddr";
145 params = setup_ethernet_tag(params, addr, i);
146 sprintf(name, "eth%daddr", ++i);
152 static struct tag *setup_boardinfo_tag(struct tag *params)
154 params->hdr.tag = ATAG_BOARDINFO;
155 params->hdr.size = tag_size(tag_boardinfo);
157 params->u.boardinfo.board_number = gd->bd->bi_board_number;
159 return tag_next(params);
162 static void setup_end_tag(struct tag *params)
164 params->hdr.tag = ATAG_NONE;
165 params->hdr.size = 0;
168 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
170 void (*theKernel)(int magic, void *tagtable);
171 struct tag *params, *params_start;
172 char *commandline = getenv("bootargs");
175 * allow the PREP bootm subcommand, it is required for bootm to work
177 * TODO: Andreas Bießmann <andreas.devel@googlemail.com> refactor the
178 * do_bootm_linux() for avr32
180 if (flag & BOOTM_STATE_OS_PREP)
183 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
186 theKernel = (void *)images->ep;
188 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
190 params = params_start = (struct tag *)gd->bd->bi_boot_params;
191 params = setup_start_tag(params);
192 params = setup_memory_tags(params);
193 if (images->rd_start) {
194 params = setup_ramdisk_tag(params,
195 PHYSADDR(images->rd_start),
196 PHYSADDR(images->rd_end));
198 params = setup_commandline_tag(params, commandline);
199 params = setup_clock_tags(params);
200 params = setup_ethernet_tags(params);
201 params = setup_boardinfo_tag(params);
202 setup_end_tag(params);
204 printf("\nStarting kernel at %p (params at %p)...\n\n",
205 theKernel, params_start);
209 theKernel(ATAG_MAGIC, params_start);
210 /* does not return */