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 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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(bootm_headers_t *images)
181 * if we are MP make sure to flush the device tree so any changes are
182 * made visibile to all other cores. In AMP boot scenarios the cores
183 * might not be HW cache coherent with each other.
185 flush_cache((unsigned long)images->ft_addr, images->ft_len);
189 static int boot_cmdline_linux(bootm_headers_t *images)
191 ulong of_size = images->ft_len;
192 struct lmb *lmb = &images->lmb;
193 ulong *cmd_start = &images->cmdline_start;
194 ulong *cmd_end = &images->cmdline_end;
199 /* allocate space and init command line */
200 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
202 puts("ERROR with allocation of cmdline\n");
210 static int boot_bd_t_linux(bootm_headers_t *images)
212 ulong of_size = images->ft_len;
213 struct lmb *lmb = &images->lmb;
214 bd_t **kbd = &images->kbd;
219 /* allocate space for kernel copy of board info */
220 ret = boot_get_kbd (lmb, kbd);
222 puts("ERROR with allocation of kernel bd\n");
225 set_clocks_in_mhz(*kbd);
232 * Verify the device tree.
234 * This function is called after all device tree fix-ups have been enacted,
235 * so that the final device tree can be verified. The definition of "verified"
236 * is up to the specific implementation. However, it generally means that the
237 * addresses of some of the devices in the device tree are compared with the
238 * actual addresses at which U-Boot has placed them.
240 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
243 static int __ft_verify_fdt(void *fdt)
247 __attribute__((weak, alias("__ft_verify_fdt"))) int ft_verify_fdt(void *fdt);
249 static int boot_body_linux(bootm_headers_t *images)
252 struct lmb *lmb = &images->lmb;
253 ulong *initrd_start = &images->initrd_start;
254 ulong *initrd_end = &images->initrd_end;
255 #if defined(CONFIG_OF_LIBFDT)
256 ulong of_size = images->ft_len;
257 char **of_flat_tree = &images->ft_addr;
262 #if defined(CONFIG_OF_LIBFDT)
263 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
266 /* allocate space and init command line */
267 ret = boot_cmdline_linux(images);
271 /* allocate space for kernel copy of board info */
272 ret = boot_bd_t_linux(images);
276 rd_len = images->rd_end - images->rd_start;
277 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
281 #if defined(CONFIG_OF_LIBFDT)
282 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
287 * Add the chosen node if it doesn't exist, add the env and bd_t
288 * if the user wants it (the logic is in the subroutines).
291 if (fdt_chosen(*of_flat_tree, 1) < 0) {
293 puts ("/chosen node create failed");
294 puts (" - must RESET the board to recover.\n");
297 #ifdef CONFIG_OF_BOARD_SETUP
298 /* Call the board-specific fixup routine */
299 ft_board_setup(*of_flat_tree, gd->bd);
302 /* Delete the old LMB reservation */
303 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
304 (phys_size_t)fdt_totalsize(*of_flat_tree));
306 ret = fdt_resize(*of_flat_tree);
311 if (*initrd_start && *initrd_end) {
312 of_size += FDT_RAMDISK_OVERHEAD;
313 fdt_set_totalsize(*of_flat_tree, of_size);
315 /* Create a new LMB reservation */
316 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
318 /* fixup the initrd now that we know where it should be */
319 if (*initrd_start && *initrd_end)
320 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
322 if (!ft_verify_fdt(*of_flat_tree))
325 #endif /* CONFIG_OF_LIBFDT */
329 __attribute__((noinline))
330 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
334 if (flag & BOOTM_STATE_OS_CMDLINE) {
335 boot_cmdline_linux(images);
339 if (flag & BOOTM_STATE_OS_BD_T) {
340 boot_bd_t_linux(images);
344 if (flag & BOOTM_STATE_OS_PREP) {
345 boot_prep_linux(images);
349 if (flag & BOOTM_STATE_OS_GO) {
350 boot_jump_linux(images);
354 boot_prep_linux(images);
355 ret = boot_body_linux(images);
358 boot_jump_linux(images);
363 static ulong get_sp (void)
367 asm( "mr %0,1": "=r"(sp) : );
371 static void set_clocks_in_mhz (bd_t *kbd)
375 if ((s = getenv ("clocks_in_mhz")) != NULL) {
376 /* convert all clock information to MHz */
377 kbd->bi_intfreq /= 1000000L;
378 kbd->bi_busfreq /= 1000000L;
379 #if defined(CONFIG_MPC8220)
380 kbd->bi_inpfreq /= 1000000L;
381 kbd->bi_pcifreq /= 1000000L;
382 kbd->bi_pevfreq /= 1000000L;
383 kbd->bi_flbfreq /= 1000000L;
384 kbd->bi_vcofreq /= 1000000L;
386 #if defined(CONFIG_CPM2)
387 kbd->bi_cpmfreq /= 1000000L;
388 kbd->bi_brgfreq /= 1000000L;
389 kbd->bi_sccfreq /= 1000000L;
390 kbd->bi_vco /= 1000000L;
392 #if defined(CONFIG_MPC5xxx)
393 kbd->bi_ipbfreq /= 1000000L;
394 kbd->bi_pcifreq /= 1000000L;
395 #endif /* CONFIG_MPC5xxx */