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,
32 #include <u-boot/zlib.h>
34 #include <environment.h>
35 #include <asm/byteorder.h>
37 #if defined(CONFIG_OF_LIBFDT)
40 #include <fdt_support.h>
43 DECLARE_GLOBAL_DATA_PTR;
45 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
46 extern ulong get_effective_memsize(void);
47 static ulong get_sp (void);
48 static void set_clocks_in_mhz (bd_t *kbd);
50 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
51 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
54 static void boot_jump_linux(bootm_headers_t *images)
56 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
57 ulong r7, ulong r8, ulong r9);
58 #ifdef CONFIG_OF_LIBFDT
59 char *of_flat_tree = images->ft_addr;
62 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
63 ulong, ulong, ulong))images->ep;
64 debug ("## Transferring control to Linux (at address %08lx) ...\n",
67 show_boot_progress (15);
69 #if defined(CONFIG_OF_LIBFDT)
70 if (of_flat_tree) { /* device tree; boot new style */
72 * Linux Kernel Parameters (passing device tree):
73 * r3: pointer to the fdt
77 * r7: size of IMA in bytes
81 #if defined(CONFIG_85xx) || defined(CONFIG_440)
82 #define EPAPR_MAGIC (0x45504150)
84 #define EPAPR_MAGIC (0x65504150)
87 debug (" Booting using OF flat tree...\n");
88 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
89 CONFIG_SYS_BOOTMAPSZ, 0, 0);
95 * Linux Kernel Parameters (passing board info data):
96 * r3: ptr to board info data
97 * r4: initrd_start or 0 if no initrd
98 * r5: initrd_end - unused if r4 is 0
99 * r6: Start of command line string
100 * r7: End of command line string
104 ulong cmd_start = images->cmdline_start;
105 ulong cmd_end = images->cmdline_end;
106 ulong initrd_start = images->initrd_start;
107 ulong initrd_end = images->initrd_end;
108 bd_t *kbd = images->kbd;
110 debug (" Booting using board info...\n");
111 (*kernel) (kbd, initrd_start, initrd_end,
112 cmd_start, cmd_end, 0, 0);
113 /* does not return */
118 void arch_lmb_reserve(struct lmb *lmb)
120 phys_size_t bootm_size;
121 ulong size, sp, bootmap_base;
123 bootmap_base = getenv_bootm_low();
124 bootm_size = getenv_bootm_size();
127 if (((u64)bootmap_base + bootm_size) >
128 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
129 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
130 if ((bootmap_base + bootm_size) > get_effective_memsize())
131 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
134 size = min(bootm_size, get_effective_memsize());
135 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
137 if (size < bootm_size) {
138 ulong base = bootmap_base + size;
139 printf("WARNING: adjusting available memory to %lx\n", size);
140 lmb_reserve(lmb, base, bootm_size - size);
144 * Booting a (Linux) kernel image
146 * Allocate space for command line and board info - the
147 * address should be as high as possible within the reach of
148 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
149 * memory, which means far enough below the current stack
153 debug ("## Current stack ends at 0x%08lx\n", sp);
155 /* adjust sp by 1K to be safe */
157 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
162 static void boot_prep_linux(void)
164 #if (CONFIG_NUM_CPUS > 1)
165 /* if we are MP make sure to flush the dcache() to any changes are made
166 * visibile to all other cores */
172 static int boot_cmdline_linux(bootm_headers_t *images)
174 ulong bootmap_base = getenv_bootm_low();
175 ulong of_size = images->ft_len;
176 struct lmb *lmb = &images->lmb;
177 ulong *cmd_start = &images->cmdline_start;
178 ulong *cmd_end = &images->cmdline_end;
183 /* allocate space and init command line */
184 ret = boot_get_cmdline (lmb, cmd_start, cmd_end, bootmap_base);
186 puts("ERROR with allocation of cmdline\n");
194 static int boot_bd_t_linux(bootm_headers_t *images)
196 ulong bootmap_base = getenv_bootm_low();
197 ulong of_size = images->ft_len;
198 struct lmb *lmb = &images->lmb;
199 bd_t **kbd = &images->kbd;
204 /* allocate space for kernel copy of board info */
205 ret = boot_get_kbd (lmb, kbd, bootmap_base);
207 puts("ERROR with allocation of kernel bd\n");
210 set_clocks_in_mhz(*kbd);
216 static int boot_body_linux(bootm_headers_t *images)
219 struct lmb *lmb = &images->lmb;
220 ulong *initrd_start = &images->initrd_start;
221 ulong *initrd_end = &images->initrd_end;
222 #if defined(CONFIG_OF_LIBFDT)
223 ulong bootmap_base = getenv_bootm_low();
224 ulong of_size = images->ft_len;
225 char **of_flat_tree = &images->ft_addr;
230 /* allocate space and init command line */
231 ret = boot_cmdline_linux(images);
235 /* allocate space for kernel copy of board info */
236 ret = boot_bd_t_linux(images);
240 rd_len = images->rd_end - images->rd_start;
241 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
245 #if defined(CONFIG_OF_LIBFDT)
246 ret = boot_relocate_fdt(lmb, bootmap_base, of_flat_tree, &of_size);
251 * Add the chosen node if it doesn't exist, add the env and bd_t
252 * if the user wants it (the logic is in the subroutines).
255 if (fdt_chosen(*of_flat_tree, 1) < 0) {
257 puts ("/chosen node create failed");
258 puts (" - must RESET the board to recover.\n");
261 #ifdef CONFIG_OF_BOARD_SETUP
262 /* Call the board-specific fixup routine */
263 ft_board_setup(*of_flat_tree, gd->bd);
266 /* Delete the old LMB reservation */
267 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
268 (phys_size_t)fdt_totalsize(*of_flat_tree));
270 ret = fdt_resize(*of_flat_tree);
275 if (*initrd_start && *initrd_end)
276 of_size += FDT_RAMDISK_OVERHEAD;
277 /* Create a new LMB reservation */
278 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
280 /* fixup the initrd now that we know where it should be */
281 if (*initrd_start && *initrd_end)
282 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
284 #endif /* CONFIG_OF_LIBFDT */
288 __attribute__((noinline))
289 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
293 if (flag & BOOTM_STATE_OS_CMDLINE) {
294 boot_cmdline_linux(images);
298 if (flag & BOOTM_STATE_OS_BD_T) {
299 boot_bd_t_linux(images);
303 if (flag & BOOTM_STATE_OS_PREP) {
308 if (flag & BOOTM_STATE_OS_GO) {
309 boot_jump_linux(images);
314 ret = boot_body_linux(images);
317 boot_jump_linux(images);
322 static ulong get_sp (void)
326 asm( "mr %0,1": "=r"(sp) : );
330 static void set_clocks_in_mhz (bd_t *kbd)
334 if ((s = getenv ("clocks_in_mhz")) != NULL) {
335 /* convert all clock information to MHz */
336 kbd->bi_intfreq /= 1000000L;
337 kbd->bi_busfreq /= 1000000L;
338 #if defined(CONFIG_MPC8220)
339 kbd->bi_inpfreq /= 1000000L;
340 kbd->bi_pcifreq /= 1000000L;
341 kbd->bi_pevfreq /= 1000000L;
342 kbd->bi_flbfreq /= 1000000L;
343 kbd->bi_vcofreq /= 1000000L;
345 #if defined(CONFIG_CPM2)
346 kbd->bi_cpmfreq /= 1000000L;
347 kbd->bi_brgfreq /= 1000000L;
348 kbd->bi_sccfreq /= 1000000L;
349 kbd->bi_vco /= 1000000L;
351 #if defined(CONFIG_MPC5xxx)
352 kbd->bi_ipbfreq /= 1000000L;
353 kbd->bi_pcifreq /= 1000000L;
354 #endif /* CONFIG_MPC5xxx */