2 * (C) Copyright 2008 Semihalf
4 * (C) Copyright 2000-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #include <environment.h>
35 #include <asm/byteorder.h>
37 #if defined(CONFIG_OF_LIBFDT)
40 #include <fdt_support.h>
44 #ifdef CFG_INIT_RAM_LOCK
45 #include <asm/cache.h>
48 DECLARE_GLOBAL_DATA_PTR;
50 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
51 extern ulong get_effective_memsize(void);
52 static ulong get_sp (void);
53 static void set_clocks_in_mhz (bd_t *kbd);
55 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
56 #define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
59 void __attribute__((noinline))
60 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
61 bootm_headers_t *images)
65 ulong initrd_start, initrd_end;
68 phys_size_t bootm_size;
70 ulong cmd_start, cmd_end, bootmap_base;
72 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
73 ulong r7, ulong r8, ulong r9);
75 ulong of_size = images->ft_len;
76 struct lmb *lmb = &images->lmb;
78 #if defined(CONFIG_OF_LIBFDT)
79 char *of_flat_tree = images->ft_addr;
82 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
83 ulong, ulong, ulong))images->ep;
85 bootmap_base = getenv_bootm_low();
86 bootm_size = getenv_bootm_size();
89 if (((u64)bootmap_base + bootm_size) >
90 (CFG_SDRAM_BASE + (u64)gd->ram_size))
91 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
92 if ((bootmap_base + bootm_size) > get_effective_memsize())
93 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
96 size = min(bootm_size, get_effective_memsize());
97 size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
99 if (size < bootm_size) {
100 ulong base = bootmap_base + size;
101 printf("WARNING: adjusting available memory to %lx\n", size);
102 lmb_reserve(lmb, base, bootm_size - size);
106 * Booting a (Linux) kernel image
108 * Allocate space for command line and board info - the
109 * address should be as high as possible within the reach of
110 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
111 * memory, which means far enough below the current stack
115 debug ("## Current stack ends at 0x%08lx\n", sp);
117 /* adjust sp by 1K to be safe */
119 lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
122 /* allocate space and init command line */
123 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
125 puts("ERROR with allocation of cmdline\n");
129 /* allocate space for kernel copy of board info */
130 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
132 puts("ERROR with allocation of kernel bd\n");
135 set_clocks_in_mhz(kbd);
138 rd_len = images->rd_end - images->rd_start;
140 #if defined(CONFIG_OF_LIBFDT)
141 ret = boot_relocate_fdt(lmb, bootmap_base, &of_flat_tree, &of_size);
146 * Add the chosen node if it doesn't exist, add the env and bd_t
147 * if the user wants it (the logic is in the subroutines).
150 /* pass in dummy initrd info, we'll fix up later */
151 if (fdt_chosen(of_flat_tree, images->rd_start, images->rd_end, 0) < 0) {
153 puts ("/chosen node create failed");
154 puts (" - must RESET the board to recover.\n");
157 #ifdef CONFIG_OF_BOARD_SETUP
158 /* Call the board-specific fixup routine */
159 ft_board_setup(of_flat_tree, gd->bd);
163 /* Fixup the fdt memreserve now that we know how big it is */
165 /* Delete the old LMB reservation */
166 lmb_free(lmb, (phys_addr_t)(u32)of_flat_tree,
167 (phys_size_t)fdt_totalsize(of_flat_tree));
169 ret = fdt_resize(of_flat_tree);
174 /* Create a new LMB reservation */
175 lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
177 #endif /* CONFIG_OF_LIBFDT */
179 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, &initrd_start, &initrd_end);
183 #if defined(CONFIG_OF_LIBFDT)
184 /* fixup the initrd now that we know where it should be */
185 if ((of_flat_tree) && (initrd_start && initrd_end)) {
187 int total = fdt_num_mem_rsv(of_flat_tree);
190 /* Look for the dummy entry and delete it */
191 for (j = 0; j < total; j++) {
192 fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
193 if (addr == images->rd_start) {
194 fdt_del_mem_rsv(of_flat_tree, j);
199 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
200 initrd_end - initrd_start + 1);
202 printf("fdt_chosen: %s\n", fdt_strerror(ret));
206 do_fixup_by_path_u32(of_flat_tree, "/chosen",
207 "linux,initrd-start", initrd_start, 0);
208 do_fixup_by_path_u32(of_flat_tree, "/chosen",
209 "linux,initrd-end", initrd_end, 0);
212 debug ("## Transferring control to Linux (at address %08lx) ...\n",
215 show_boot_progress (15);
217 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
218 unlock_ram_in_cache();
221 #if defined(CONFIG_OF_LIBFDT)
222 if (of_flat_tree) { /* device tree; boot new style */
224 * Linux Kernel Parameters (passing device tree):
225 * r3: pointer to the fdt
229 * r7: size of IMA in bytes
233 #if defined(CONFIG_85xx) || defined(CONFIG_440)
234 #define EPAPR_MAGIC (0x45504150)
236 #define EPAPR_MAGIC (0x65504150)
239 debug (" Booting using OF flat tree...\n");
240 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
241 CFG_BOOTMAPSZ, 0, 0);
242 /* does not return */
247 * Linux Kernel Parameters (passing board info data):
248 * r3: ptr to board info data
249 * r4: initrd_start or 0 if no initrd
250 * r5: initrd_end - unused if r4 is 0
251 * r6: Start of command line string
252 * r7: End of command line string
256 debug (" Booting using board info...\n");
257 (*kernel) (kbd, initrd_start, initrd_end,
258 cmd_start, cmd_end, 0, 0);
259 /* does not return */
264 do_reset (cmdtp, flag, argc, argv);
268 static ulong get_sp (void)
272 asm( "mr %0,1": "=r"(sp) : );
276 static void set_clocks_in_mhz (bd_t *kbd)
280 if ((s = getenv ("clocks_in_mhz")) != NULL) {
281 /* convert all clock information to MHz */
282 kbd->bi_intfreq /= 1000000L;
283 kbd->bi_busfreq /= 1000000L;
284 #if defined(CONFIG_MPC8220)
285 kbd->bi_inpfreq /= 1000000L;
286 kbd->bi_pcifreq /= 1000000L;
287 kbd->bi_pevfreq /= 1000000L;
288 kbd->bi_flbfreq /= 1000000L;
289 kbd->bi_vcofreq /= 1000000L;
291 #if defined(CONFIG_CPM2)
292 kbd->bi_cpmfreq /= 1000000L;
293 kbd->bi_brgfreq /= 1000000L;
294 kbd->bi_sccfreq /= 1000000L;
295 kbd->bi_vco /= 1000000L;
297 #if defined(CONFIG_MPC5xxx)
298 kbd->bi_ipbfreq /= 1000000L;
299 kbd->bi_pcifreq /= 1000000L;
300 #endif /* CONFIG_MPC5xxx */