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)
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 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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 debug (" Booting using OF flat tree...\n");
91 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
92 getenv_bootm_mapsize(), 0, 0);
98 * Linux Kernel Parameters (passing board info data):
99 * r3: ptr to board info data
100 * r4: initrd_start or 0 if no initrd
101 * r5: initrd_end - unused if r4 is 0
102 * r6: Start of command line string
103 * r7: End of command line string
107 ulong cmd_start = images->cmdline_start;
108 ulong cmd_end = images->cmdline_end;
109 ulong initrd_start = images->initrd_start;
110 ulong initrd_end = images->initrd_end;
111 bd_t *kbd = images->kbd;
113 debug (" Booting using board info...\n");
115 (*kernel) (kbd, initrd_start, initrd_end,
116 cmd_start, cmd_end, 0, 0);
117 /* does not return */
122 void arch_lmb_reserve(struct lmb *lmb)
124 phys_size_t bootm_size;
125 ulong size, sp, bootmap_base;
127 bootmap_base = getenv_bootm_low();
128 bootm_size = getenv_bootm_size();
131 if (((u64)bootmap_base + bootm_size) >
132 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
133 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
134 if ((bootmap_base + bootm_size) > get_effective_memsize())
135 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
138 size = min(bootm_size, get_effective_memsize());
139 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
141 if (size < bootm_size) {
142 ulong base = bootmap_base + size;
143 printf("WARNING: adjusting available memory to %lx\n", size);
144 lmb_reserve(lmb, base, bootm_size - size);
148 * Booting a (Linux) kernel image
150 * Allocate space for command line and board info - the
151 * address should be as high as possible within the reach of
152 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
153 * memory, which means far enough below the current stack
157 debug ("## Current stack ends at 0x%08lx\n", sp);
159 /* adjust sp by 4K to be safe */
161 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
164 cpu_mp_lmb_reserve(lmb);
170 static void boot_prep_linux(bootm_headers_t *images)
174 * if we are MP make sure to flush the device tree so any changes are
175 * made visibile to all other cores. In AMP boot scenarios the cores
176 * might not be HW cache coherent with each other.
178 flush_cache((unsigned long)images->ft_addr, images->ft_len);
182 static int boot_cmdline_linux(bootm_headers_t *images)
184 ulong of_size = images->ft_len;
185 struct lmb *lmb = &images->lmb;
186 ulong *cmd_start = &images->cmdline_start;
187 ulong *cmd_end = &images->cmdline_end;
192 /* allocate space and init command line */
193 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
195 puts("ERROR with allocation of cmdline\n");
203 static int boot_bd_t_linux(bootm_headers_t *images)
205 ulong of_size = images->ft_len;
206 struct lmb *lmb = &images->lmb;
207 bd_t **kbd = &images->kbd;
212 /* allocate space for kernel copy of board info */
213 ret = boot_get_kbd (lmb, kbd);
215 puts("ERROR with allocation of kernel bd\n");
218 set_clocks_in_mhz(*kbd);
225 * Verify the device tree.
227 * This function is called after all device tree fix-ups have been enacted,
228 * so that the final device tree can be verified. The definition of "verified"
229 * is up to the specific implementation. However, it generally means that the
230 * addresses of some of the devices in the device tree are compared with the
231 * actual addresses at which U-Boot has placed them.
233 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
236 static int __ft_verify_fdt(void *fdt)
240 __attribute__((weak, alias("__ft_verify_fdt"))) int ft_verify_fdt(void *fdt);
242 static int boot_body_linux(bootm_headers_t *images)
245 struct lmb *lmb = &images->lmb;
246 ulong *initrd_start = &images->initrd_start;
247 ulong *initrd_end = &images->initrd_end;
248 #if defined(CONFIG_OF_LIBFDT)
249 ulong of_size = images->ft_len;
250 char **of_flat_tree = &images->ft_addr;
255 #if defined(CONFIG_OF_LIBFDT)
256 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
259 /* allocate space and init command line */
260 ret = boot_cmdline_linux(images);
264 /* allocate space for kernel copy of board info */
265 ret = boot_bd_t_linux(images);
269 rd_len = images->rd_end - images->rd_start;
270 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
274 #if defined(CONFIG_OF_LIBFDT)
275 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
280 * Add the chosen node if it doesn't exist, add the env and bd_t
281 * if the user wants it (the logic is in the subroutines).
284 if (fdt_chosen(*of_flat_tree, 1) < 0) {
286 puts ("/chosen node create failed");
287 puts (" - must RESET the board to recover.\n");
290 #ifdef CONFIG_OF_BOARD_SETUP
291 /* Call the board-specific fixup routine */
292 ft_board_setup(*of_flat_tree, gd->bd);
295 /* Delete the old LMB reservation */
296 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
297 (phys_size_t)fdt_totalsize(*of_flat_tree));
299 ret = fdt_resize(*of_flat_tree);
304 if (*initrd_start && *initrd_end) {
305 of_size += FDT_RAMDISK_OVERHEAD;
306 fdt_set_totalsize(*of_flat_tree, of_size);
308 /* Create a new LMB reservation */
309 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
311 /* fixup the initrd now that we know where it should be */
312 if (*initrd_start && *initrd_end)
313 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
315 if (!ft_verify_fdt(*of_flat_tree))
318 #endif /* CONFIG_OF_LIBFDT */
323 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
327 if (flag & BOOTM_STATE_OS_CMDLINE) {
328 boot_cmdline_linux(images);
332 if (flag & BOOTM_STATE_OS_BD_T) {
333 boot_bd_t_linux(images);
337 if (flag & BOOTM_STATE_OS_PREP) {
338 boot_prep_linux(images);
342 if (flag & BOOTM_STATE_OS_GO) {
343 boot_jump_linux(images);
347 boot_prep_linux(images);
348 ret = boot_body_linux(images);
351 boot_jump_linux(images);
356 static ulong get_sp (void)
360 asm( "mr %0,1": "=r"(sp) : );
364 static void set_clocks_in_mhz (bd_t *kbd)
368 if ((s = getenv ("clocks_in_mhz")) != NULL) {
369 /* convert all clock information to MHz */
370 kbd->bi_intfreq /= 1000000L;
371 kbd->bi_busfreq /= 1000000L;
372 #if defined(CONFIG_MPC8220)
373 kbd->bi_inpfreq /= 1000000L;
374 kbd->bi_pcifreq /= 1000000L;
375 kbd->bi_pevfreq /= 1000000L;
376 kbd->bi_flbfreq /= 1000000L;
377 kbd->bi_vcofreq /= 1000000L;
379 #if defined(CONFIG_CPM2)
380 kbd->bi_cpmfreq /= 1000000L;
381 kbd->bi_brgfreq /= 1000000L;
382 kbd->bi_sccfreq /= 1000000L;
383 kbd->bi_vco /= 1000000L;
385 #if defined(CONFIG_MPC5xxx)
386 kbd->bi_ipbfreq /= 1000000L;
387 kbd->bi_pcifreq /= 1000000L;
388 #endif /* CONFIG_MPC5xxx */