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 debug (" Booting using OF flat tree...\n");
92 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
93 getenv_bootm_mapsize(), 0, 0);
99 * Linux Kernel Parameters (passing board info data):
100 * r3: ptr to board info data
101 * r4: initrd_start or 0 if no initrd
102 * r5: initrd_end - unused if r4 is 0
103 * r6: Start of command line string
104 * r7: End of command line string
108 ulong cmd_start = images->cmdline_start;
109 ulong cmd_end = images->cmdline_end;
110 ulong initrd_start = images->initrd_start;
111 ulong initrd_end = images->initrd_end;
112 bd_t *kbd = images->kbd;
114 debug (" Booting using board info...\n");
116 (*kernel) (kbd, initrd_start, initrd_end,
117 cmd_start, cmd_end, 0, 0);
118 /* does not return */
123 void arch_lmb_reserve(struct lmb *lmb)
125 phys_size_t bootm_size;
126 ulong size, sp, bootmap_base;
128 bootmap_base = getenv_bootm_low();
129 bootm_size = getenv_bootm_size();
132 if (((u64)bootmap_base + bootm_size) >
133 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
134 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
135 if ((bootmap_base + bootm_size) > get_effective_memsize())
136 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
139 size = min(bootm_size, get_effective_memsize());
140 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
142 if (size < bootm_size) {
143 ulong base = bootmap_base + size;
144 printf("WARNING: adjusting available memory to %lx\n", size);
145 lmb_reserve(lmb, base, bootm_size - size);
149 * Booting a (Linux) kernel image
151 * Allocate space for command line and board info - the
152 * address should be as high as possible within the reach of
153 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
154 * memory, which means far enough below the current stack
158 debug ("## Current stack ends at 0x%08lx\n", sp);
160 /* adjust sp by 4K to be safe */
162 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
165 cpu_mp_lmb_reserve(lmb);
171 static void boot_prep_linux(bootm_headers_t *images)
175 * if we are MP make sure to flush the device tree so any changes are
176 * made visibile to all other cores. In AMP boot scenarios the cores
177 * might not be HW cache coherent with each other.
179 flush_cache((unsigned long)images->ft_addr, images->ft_len);
183 static int boot_cmdline_linux(bootm_headers_t *images)
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);
196 puts("ERROR with allocation of cmdline\n");
204 static int boot_bd_t_linux(bootm_headers_t *images)
206 ulong of_size = images->ft_len;
207 struct lmb *lmb = &images->lmb;
208 bd_t **kbd = &images->kbd;
213 /* allocate space for kernel copy of board info */
214 ret = boot_get_kbd (lmb, kbd);
216 puts("ERROR with allocation of kernel bd\n");
219 set_clocks_in_mhz(*kbd);
226 * Verify the device tree.
228 * This function is called after all device tree fix-ups have been enacted,
229 * so that the final device tree can be verified. The definition of "verified"
230 * is up to the specific implementation. However, it generally means that the
231 * addresses of some of the devices in the device tree are compared with the
232 * actual addresses at which U-Boot has placed them.
234 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
237 static int __ft_verify_fdt(void *fdt)
241 __attribute__((weak, alias("__ft_verify_fdt"))) int ft_verify_fdt(void *fdt);
243 static int boot_body_linux(bootm_headers_t *images)
246 struct lmb *lmb = &images->lmb;
247 ulong *initrd_start = &images->initrd_start;
248 ulong *initrd_end = &images->initrd_end;
249 #if defined(CONFIG_OF_LIBFDT)
250 ulong of_size = images->ft_len;
251 char **of_flat_tree = &images->ft_addr;
256 #if defined(CONFIG_OF_LIBFDT)
257 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
260 /* allocate space and init command line */
261 ret = boot_cmdline_linux(images);
265 /* allocate space for kernel copy of board info */
266 ret = boot_bd_t_linux(images);
270 rd_len = images->rd_end - images->rd_start;
271 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
275 #if defined(CONFIG_OF_LIBFDT)
276 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
281 * Add the chosen node if it doesn't exist, add the env and bd_t
282 * if the user wants it (the logic is in the subroutines).
285 if (fdt_chosen(*of_flat_tree, 1) < 0) {
287 puts ("/chosen node create failed");
288 puts (" - must RESET the board to recover.\n");
291 #ifdef CONFIG_OF_BOARD_SETUP
292 /* Call the board-specific fixup routine */
293 ft_board_setup(*of_flat_tree, gd->bd);
296 /* Delete the old LMB reservation */
297 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
298 (phys_size_t)fdt_totalsize(*of_flat_tree));
300 ret = fdt_resize(*of_flat_tree);
305 if (*initrd_start && *initrd_end) {
306 of_size += FDT_RAMDISK_OVERHEAD;
307 fdt_set_totalsize(*of_flat_tree, of_size);
309 /* Create a new LMB reservation */
310 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
312 /* fixup the initrd now that we know where it should be */
313 if (*initrd_start && *initrd_end)
314 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
316 if (!ft_verify_fdt(*of_flat_tree))
319 #endif /* CONFIG_OF_LIBFDT */
324 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
328 if (flag & BOOTM_STATE_OS_CMDLINE) {
329 boot_cmdline_linux(images);
333 if (flag & BOOTM_STATE_OS_BD_T) {
334 boot_bd_t_linux(images);
338 if (flag & BOOTM_STATE_OS_PREP) {
339 boot_prep_linux(images);
343 if (flag & BOOTM_STATE_OS_GO) {
344 boot_jump_linux(images);
348 boot_prep_linux(images);
349 ret = boot_body_linux(images);
352 boot_jump_linux(images);
357 static ulong get_sp (void)
361 asm( "mr %0,1": "=r"(sp) : );
365 static void set_clocks_in_mhz (bd_t *kbd)
369 if ((s = getenv ("clocks_in_mhz")) != NULL) {
370 /* convert all clock information to MHz */
371 kbd->bi_intfreq /= 1000000L;
372 kbd->bi_busfreq /= 1000000L;
373 #if defined(CONFIG_MPC8220)
374 kbd->bi_inpfreq /= 1000000L;
375 kbd->bi_pcifreq /= 1000000L;
376 kbd->bi_pevfreq /= 1000000L;
377 kbd->bi_flbfreq /= 1000000L;
378 kbd->bi_vcofreq /= 1000000L;
380 #if defined(CONFIG_CPM2)
381 kbd->bi_cpmfreq /= 1000000L;
382 kbd->bi_brgfreq /= 1000000L;
383 kbd->bi_sccfreq /= 1000000L;
384 kbd->bi_vco /= 1000000L;
386 #if defined(CONFIG_MPC5xxx)
387 kbd->bi_ipbfreq /= 1000000L;
388 kbd->bi_pcifreq /= 1000000L;
389 #endif /* CONFIG_MPC5xxx */