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>
38 #if defined(CONFIG_OF_LIBFDT)
41 #include <fdt_support.h>
45 #ifdef CONFIG_SYS_INIT_RAM_LOCK
46 #include <asm/cache.h>
49 DECLARE_GLOBAL_DATA_PTR;
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 CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
56 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
59 static void boot_jump_linux(bootm_headers_t *images)
61 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
62 ulong r7, ulong r8, ulong r9);
63 #ifdef CONFIG_OF_LIBFDT
64 char *of_flat_tree = images->ft_addr;
67 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
68 ulong, ulong, ulong))images->ep;
69 debug ("## Transferring control to Linux (at address %08lx) ...\n",
72 show_boot_progress (15);
74 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
75 unlock_ram_in_cache();
78 #if defined(CONFIG_OF_LIBFDT)
79 if (of_flat_tree) { /* device tree; boot new style */
81 * Linux Kernel Parameters (passing device tree):
82 * r3: pointer to the fdt
86 * r7: size of IMA in bytes
90 #if defined(CONFIG_MPC85xx) || defined(CONFIG_440)
91 #define EPAPR_MAGIC (0x45504150)
93 #define EPAPR_MAGIC (0x65504150)
96 debug (" Booting using OF flat tree...\n");
98 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
99 getenv_bootm_mapsize(), 0, 0);
100 /* does not return */
105 * Linux Kernel Parameters (passing board info data):
106 * r3: ptr to board info data
107 * r4: initrd_start or 0 if no initrd
108 * r5: initrd_end - unused if r4 is 0
109 * r6: Start of command line string
110 * r7: End of command line string
114 ulong cmd_start = images->cmdline_start;
115 ulong cmd_end = images->cmdline_end;
116 ulong initrd_start = images->initrd_start;
117 ulong initrd_end = images->initrd_end;
118 bd_t *kbd = images->kbd;
120 debug (" Booting using board info...\n");
122 (*kernel) (kbd, initrd_start, initrd_end,
123 cmd_start, cmd_end, 0, 0);
124 /* does not return */
129 void arch_lmb_reserve(struct lmb *lmb)
131 phys_size_t bootm_size;
132 ulong size, sp, bootmap_base;
134 bootmap_base = getenv_bootm_low();
135 bootm_size = getenv_bootm_size();
138 if (((u64)bootmap_base + bootm_size) >
139 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
140 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
141 if ((bootmap_base + bootm_size) > get_effective_memsize())
142 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
145 size = min(bootm_size, get_effective_memsize());
146 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
148 if (size < bootm_size) {
149 ulong base = bootmap_base + size;
150 printf("WARNING: adjusting available memory to %lx\n", size);
151 lmb_reserve(lmb, base, bootm_size - size);
155 * Booting a (Linux) kernel image
157 * Allocate space for command line and board info - the
158 * address should be as high as possible within the reach of
159 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
160 * memory, which means far enough below the current stack
164 debug ("## Current stack ends at 0x%08lx\n", sp);
166 /* adjust sp by 4K to be safe */
168 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
171 cpu_mp_lmb_reserve(lmb);
177 static void boot_prep_linux(void)
180 /* if we are MP make sure to flush the dcache() to any changes are made
181 * visibile to all other cores */
187 static int boot_cmdline_linux(bootm_headers_t *images)
189 ulong of_size = images->ft_len;
190 struct lmb *lmb = &images->lmb;
191 ulong *cmd_start = &images->cmdline_start;
192 ulong *cmd_end = &images->cmdline_end;
197 /* allocate space and init command line */
198 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
200 puts("ERROR with allocation of cmdline\n");
208 static int boot_bd_t_linux(bootm_headers_t *images)
210 ulong of_size = images->ft_len;
211 struct lmb *lmb = &images->lmb;
212 bd_t **kbd = &images->kbd;
217 /* allocate space for kernel copy of board info */
218 ret = boot_get_kbd (lmb, kbd);
220 puts("ERROR with allocation of kernel bd\n");
223 set_clocks_in_mhz(*kbd);
229 static int boot_body_linux(bootm_headers_t *images)
232 struct lmb *lmb = &images->lmb;
233 ulong *initrd_start = &images->initrd_start;
234 ulong *initrd_end = &images->initrd_end;
235 #if defined(CONFIG_OF_LIBFDT)
236 ulong of_size = images->ft_len;
237 char **of_flat_tree = &images->ft_addr;
242 #if defined(CONFIG_OF_LIBFDT)
243 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
246 /* allocate space and init command line */
247 ret = boot_cmdline_linux(images);
251 /* allocate space for kernel copy of board info */
252 ret = boot_bd_t_linux(images);
256 rd_len = images->rd_end - images->rd_start;
257 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
261 #if defined(CONFIG_OF_LIBFDT)
262 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
267 * Add the chosen node if it doesn't exist, add the env and bd_t
268 * if the user wants it (the logic is in the subroutines).
271 if (fdt_chosen(*of_flat_tree, 1) < 0) {
273 puts ("/chosen node create failed");
274 puts (" - must RESET the board to recover.\n");
277 #ifdef CONFIG_OF_BOARD_SETUP
278 /* Call the board-specific fixup routine */
279 ft_board_setup(*of_flat_tree, gd->bd);
282 /* Delete the old LMB reservation */
283 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
284 (phys_size_t)fdt_totalsize(*of_flat_tree));
286 ret = fdt_resize(*of_flat_tree);
291 if (*initrd_start && *initrd_end) {
292 of_size += FDT_RAMDISK_OVERHEAD;
293 fdt_set_totalsize(*of_flat_tree, of_size);
295 /* Create a new LMB reservation */
296 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
298 /* fixup the initrd now that we know where it should be */
299 if (*initrd_start && *initrd_end)
300 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
302 #endif /* CONFIG_OF_LIBFDT */
306 __attribute__((noinline))
307 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
311 if (flag & BOOTM_STATE_OS_CMDLINE) {
312 boot_cmdline_linux(images);
316 if (flag & BOOTM_STATE_OS_BD_T) {
317 boot_bd_t_linux(images);
321 if (flag & BOOTM_STATE_OS_PREP) {
326 if (flag & BOOTM_STATE_OS_GO) {
327 boot_jump_linux(images);
332 ret = boot_body_linux(images);
335 boot_jump_linux(images);
340 static ulong get_sp (void)
344 asm( "mr %0,1": "=r"(sp) : );
348 static void set_clocks_in_mhz (bd_t *kbd)
352 if ((s = getenv ("clocks_in_mhz")) != NULL) {
353 /* convert all clock information to MHz */
354 kbd->bi_intfreq /= 1000000L;
355 kbd->bi_busfreq /= 1000000L;
356 #if defined(CONFIG_MPC8220)
357 kbd->bi_inpfreq /= 1000000L;
358 kbd->bi_pcifreq /= 1000000L;
359 kbd->bi_pevfreq /= 1000000L;
360 kbd->bi_flbfreq /= 1000000L;
361 kbd->bi_vcofreq /= 1000000L;
363 #if defined(CONFIG_CPM2)
364 kbd->bi_cpmfreq /= 1000000L;
365 kbd->bi_brgfreq /= 1000000L;
366 kbd->bi_sccfreq /= 1000000L;
367 kbd->bi_vco /= 1000000L;
369 #if defined(CONFIG_MPC5xxx)
370 kbd->bi_ipbfreq /= 1000000L;
371 kbd->bi_pcifreq /= 1000000L;
372 #endif /* CONFIG_MPC5xxx */