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>
44 #ifdef CONFIG_SYS_INIT_RAM_LOCK
45 #include <asm/cache.h>
48 DECLARE_GLOBAL_DATA_PTR;
50 extern ulong get_effective_memsize(void);
51 static ulong get_sp (void);
52 static void set_clocks_in_mhz (bd_t *kbd);
54 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
55 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
58 static void boot_jump_linux(bootm_headers_t *images)
60 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
61 ulong r7, ulong r8, ulong r9);
62 #ifdef CONFIG_OF_LIBFDT
63 char *of_flat_tree = images->ft_addr;
66 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
67 ulong, ulong, ulong))images->ep;
68 debug ("## Transferring control to Linux (at address %08lx) ...\n",
71 show_boot_progress (15);
73 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
74 unlock_ram_in_cache();
77 #if defined(CONFIG_OF_LIBFDT)
78 if (of_flat_tree) { /* device tree; boot new style */
80 * Linux Kernel Parameters (passing device tree):
81 * r3: pointer to the fdt
85 * r7: size of IMA in bytes
89 #if defined(CONFIG_85xx) || defined(CONFIG_440)
90 #define EPAPR_MAGIC (0x45504150)
92 #define EPAPR_MAGIC (0x65504150)
95 debug (" Booting using OF flat tree...\n");
97 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
98 CONFIG_SYS_BOOTMAPSZ, 0, 0);
104 * Linux Kernel Parameters (passing board info data):
105 * r3: ptr to board info data
106 * r4: initrd_start or 0 if no initrd
107 * r5: initrd_end - unused if r4 is 0
108 * r6: Start of command line string
109 * r7: End of command line string
113 ulong cmd_start = images->cmdline_start;
114 ulong cmd_end = images->cmdline_end;
115 ulong initrd_start = images->initrd_start;
116 ulong initrd_end = images->initrd_end;
117 bd_t *kbd = images->kbd;
119 debug (" Booting using board info...\n");
121 (*kernel) (kbd, initrd_start, initrd_end,
122 cmd_start, cmd_end, 0, 0);
123 /* does not return */
128 void arch_lmb_reserve(struct lmb *lmb)
130 phys_size_t bootm_size;
131 ulong size, sp, bootmap_base;
133 bootmap_base = getenv_bootm_low();
134 bootm_size = getenv_bootm_size();
137 if (((u64)bootmap_base + bootm_size) >
138 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
139 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
140 if ((bootmap_base + bootm_size) > get_effective_memsize())
141 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
144 size = min(bootm_size, get_effective_memsize());
145 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
147 if (size < bootm_size) {
148 ulong base = bootmap_base + size;
149 printf("WARNING: adjusting available memory to %lx\n", size);
150 lmb_reserve(lmb, base, bootm_size - size);
154 * Booting a (Linux) kernel image
156 * Allocate space for command line and board info - the
157 * address should be as high as possible within the reach of
158 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
159 * memory, which means far enough below the current stack
163 debug ("## Current stack ends at 0x%08lx\n", sp);
165 /* adjust sp by 4K to be safe */
167 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
172 static void boot_prep_linux(void)
175 /* if we are MP make sure to flush the dcache() to any changes are made
176 * visibile to all other cores */
182 static int boot_cmdline_linux(bootm_headers_t *images)
184 ulong bootmap_base = getenv_bootm_low();
185 ulong of_size = images->ft_len;
186 struct lmb *lmb = &images->lmb;
187 ulong *cmd_start = &images->cmdline_start;
188 ulong *cmd_end = &images->cmdline_end;
193 /* allocate space and init command line */
194 ret = boot_get_cmdline (lmb, cmd_start, cmd_end, bootmap_base);
196 puts("ERROR with allocation of cmdline\n");
204 static int boot_bd_t_linux(bootm_headers_t *images)
206 ulong bootmap_base = getenv_bootm_low();
207 ulong of_size = images->ft_len;
208 struct lmb *lmb = &images->lmb;
209 bd_t **kbd = &images->kbd;
214 /* allocate space for kernel copy of board info */
215 ret = boot_get_kbd (lmb, kbd, bootmap_base);
217 puts("ERROR with allocation of kernel bd\n");
220 set_clocks_in_mhz(*kbd);
226 static int boot_body_linux(bootm_headers_t *images)
229 struct lmb *lmb = &images->lmb;
230 ulong *initrd_start = &images->initrd_start;
231 ulong *initrd_end = &images->initrd_end;
232 #if defined(CONFIG_OF_LIBFDT)
233 ulong bootmap_base = getenv_bootm_low();
234 ulong of_size = images->ft_len;
235 char **of_flat_tree = &images->ft_addr;
240 /* allocate space and init command line */
241 ret = boot_cmdline_linux(images);
245 /* allocate space for kernel copy of board info */
246 ret = boot_bd_t_linux(images);
250 rd_len = images->rd_end - images->rd_start;
251 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
255 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_SYS_BOOTMAPSZ)
256 ret = boot_relocate_fdt(lmb, bootmap_base, of_flat_tree, &of_size);
261 * Add the chosen node if it doesn't exist, add the env and bd_t
262 * if the user wants it (the logic is in the subroutines).
265 if (fdt_chosen(*of_flat_tree, 1) < 0) {
267 puts ("/chosen node create failed");
268 puts (" - must RESET the board to recover.\n");
271 #ifdef CONFIG_OF_BOARD_SETUP
272 /* Call the board-specific fixup routine */
273 ft_board_setup(*of_flat_tree, gd->bd);
276 /* Delete the old LMB reservation */
277 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
278 (phys_size_t)fdt_totalsize(*of_flat_tree));
280 ret = fdt_resize(*of_flat_tree);
285 if (*initrd_start && *initrd_end)
286 of_size += FDT_RAMDISK_OVERHEAD;
287 /* Create a new LMB reservation */
288 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
290 /* fixup the initrd now that we know where it should be */
291 if (*initrd_start && *initrd_end)
292 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
294 #endif /* CONFIG_OF_LIBFDT && CONFIG_SYS_BOOTMAPSZ */
298 __attribute__((noinline))
299 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
303 if (flag & BOOTM_STATE_OS_CMDLINE) {
304 boot_cmdline_linux(images);
308 if (flag & BOOTM_STATE_OS_BD_T) {
309 boot_bd_t_linux(images);
313 if (flag & BOOTM_STATE_OS_PREP) {
318 if (flag & BOOTM_STATE_OS_GO) {
319 boot_jump_linux(images);
324 ret = boot_body_linux(images);
327 boot_jump_linux(images);
332 static ulong get_sp (void)
336 asm( "mr %0,1": "=r"(sp) : );
340 static void set_clocks_in_mhz (bd_t *kbd)
344 if ((s = getenv ("clocks_in_mhz")) != NULL) {
345 /* convert all clock information to MHz */
346 kbd->bi_intfreq /= 1000000L;
347 kbd->bi_busfreq /= 1000000L;
348 #if defined(CONFIG_MPC8220)
349 kbd->bi_inpfreq /= 1000000L;
350 kbd->bi_pcifreq /= 1000000L;
351 kbd->bi_pevfreq /= 1000000L;
352 kbd->bi_flbfreq /= 1000000L;
353 kbd->bi_vcofreq /= 1000000L;
355 #if defined(CONFIG_CPM2)
356 kbd->bi_cpmfreq /= 1000000L;
357 kbd->bi_brgfreq /= 1000000L;
358 kbd->bi_sccfreq /= 1000000L;
359 kbd->bi_vco /= 1000000L;
361 #if defined(CONFIG_MPC5xxx)
362 kbd->bi_ipbfreq /= 1000000L;
363 kbd->bi_pcifreq /= 1000000L;
364 #endif /* CONFIG_MPC5xxx */