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>
43 #ifdef CONFIG_SYS_INIT_RAM_LOCK
44 #include <asm/cache.h>
47 DECLARE_GLOBAL_DATA_PTR
;
49 extern ulong
get_effective_memsize(void);
50 static ulong
get_sp (void);
51 static void set_clocks_in_mhz (bd_t
*kbd
);
53 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
54 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
57 static void boot_jump_linux(bootm_headers_t
*images
)
59 void (*kernel
)(bd_t
*, ulong r4
, ulong r5
, ulong r6
,
60 ulong r7
, ulong r8
, ulong r9
);
61 #ifdef CONFIG_OF_LIBFDT
62 char *of_flat_tree
= images
->ft_addr
;
65 kernel
= (void (*)(bd_t
*, ulong
, ulong
, ulong
,
66 ulong
, ulong
, ulong
))images
->ep
;
67 debug ("## Transferring control to Linux (at address %08lx) ...\n",
70 bootstage_mark(BOOTSTAGE_ID_RUN_OS
);
72 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
73 unlock_ram_in_cache();
76 #if defined(CONFIG_OF_LIBFDT)
77 if (of_flat_tree
) { /* device tree; boot new style */
79 * Linux Kernel Parameters (passing device tree):
80 * r3: pointer to the fdt
84 * r7: size of IMA in bytes
88 debug (" Booting using OF flat tree...\n");
90 (*kernel
) ((bd_t
*)of_flat_tree
, 0, 0, EPAPR_MAGIC
,
91 getenv_bootm_mapsize(), 0, 0);
97 * Linux Kernel Parameters (passing board info data):
98 * r3: ptr to board info data
99 * r4: initrd_start or 0 if no initrd
100 * r5: initrd_end - unused if r4 is 0
101 * r6: Start of command line string
102 * r7: End of command line string
106 ulong cmd_start
= images
->cmdline_start
;
107 ulong cmd_end
= images
->cmdline_end
;
108 ulong initrd_start
= images
->initrd_start
;
109 ulong initrd_end
= images
->initrd_end
;
110 bd_t
*kbd
= images
->kbd
;
112 debug (" Booting using board info...\n");
114 (*kernel
) (kbd
, initrd_start
, initrd_end
,
115 cmd_start
, cmd_end
, 0, 0);
116 /* does not return */
121 void arch_lmb_reserve(struct lmb
*lmb
)
123 phys_size_t bootm_size
;
124 ulong size
, sp
, bootmap_base
;
126 bootmap_base
= getenv_bootm_low();
127 bootm_size
= getenv_bootm_size();
130 if (((u64
)bootmap_base
+ bootm_size
) >
131 (CONFIG_SYS_SDRAM_BASE
+ (u64
)gd
->ram_size
))
132 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
133 if ((bootmap_base
+ bootm_size
) > get_effective_memsize())
134 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
137 size
= min(bootm_size
, get_effective_memsize());
138 size
= min(size
, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
);
140 if (size
< bootm_size
) {
141 ulong base
= bootmap_base
+ size
;
142 printf("WARNING: adjusting available memory to %lx\n", size
);
143 lmb_reserve(lmb
, base
, bootm_size
- size
);
147 * Booting a (Linux) kernel image
149 * Allocate space for command line and board info - the
150 * address should be as high as possible within the reach of
151 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
152 * memory, which means far enough below the current stack
156 debug ("## Current stack ends at 0x%08lx\n", sp
);
158 /* adjust sp by 4K to be safe */
160 lmb_reserve(lmb
, sp
, (CONFIG_SYS_SDRAM_BASE
+ get_effective_memsize() - sp
));
163 cpu_mp_lmb_reserve(lmb
);
169 static void boot_prep_linux(bootm_headers_t
*images
)
173 * if we are MP make sure to flush the device tree so any changes are
174 * made visibile to all other cores. In AMP boot scenarios the cores
175 * might not be HW cache coherent with each other.
177 flush_cache((unsigned long)images
->ft_addr
, images
->ft_len
);
181 static int boot_cmdline_linux(bootm_headers_t
*images
)
183 ulong of_size
= images
->ft_len
;
184 struct lmb
*lmb
= &images
->lmb
;
185 ulong
*cmd_start
= &images
->cmdline_start
;
186 ulong
*cmd_end
= &images
->cmdline_end
;
191 /* allocate space and init command line */
192 ret
= boot_get_cmdline (lmb
, cmd_start
, cmd_end
);
194 puts("ERROR with allocation of cmdline\n");
202 static int boot_bd_t_linux(bootm_headers_t
*images
)
204 ulong of_size
= images
->ft_len
;
205 struct lmb
*lmb
= &images
->lmb
;
206 bd_t
**kbd
= &images
->kbd
;
211 /* allocate space for kernel copy of board info */
212 ret
= boot_get_kbd (lmb
, kbd
);
214 puts("ERROR with allocation of kernel bd\n");
217 set_clocks_in_mhz(*kbd
);
224 * Verify the device tree.
226 * This function is called after all device tree fix-ups have been enacted,
227 * so that the final device tree can be verified. The definition of "verified"
228 * is up to the specific implementation. However, it generally means that the
229 * addresses of some of the devices in the device tree are compared with the
230 * actual addresses at which U-Boot has placed them.
232 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
235 static int __ft_verify_fdt(void *fdt
)
239 __attribute__((weak
, alias("__ft_verify_fdt"))) int ft_verify_fdt(void *fdt
);
241 static int boot_body_linux(bootm_headers_t
*images
)
244 struct lmb
*lmb
= &images
->lmb
;
245 ulong
*initrd_start
= &images
->initrd_start
;
246 ulong
*initrd_end
= &images
->initrd_end
;
247 #if defined(CONFIG_OF_LIBFDT)
248 ulong of_size
= images
->ft_len
;
249 char **of_flat_tree
= &images
->ft_addr
;
254 #if defined(CONFIG_OF_LIBFDT)
255 boot_fdt_add_mem_rsv_regions(lmb
, *of_flat_tree
);
258 /* allocate space and init command line */
259 ret
= boot_cmdline_linux(images
);
263 /* allocate space for kernel copy of board info */
264 ret
= boot_bd_t_linux(images
);
268 rd_len
= images
->rd_end
- images
->rd_start
;
269 ret
= boot_ramdisk_high (lmb
, images
->rd_start
, rd_len
, initrd_start
, initrd_end
);
273 #if defined(CONFIG_OF_LIBFDT)
274 ret
= boot_relocate_fdt(lmb
, of_flat_tree
, &of_size
);
279 * Add the chosen node if it doesn't exist, add the env and bd_t
280 * if the user wants it (the logic is in the subroutines).
283 if (fdt_chosen(*of_flat_tree
, 1) < 0) {
285 puts ("/chosen node create failed");
286 puts (" - must RESET the board to recover.\n");
289 #ifdef CONFIG_OF_BOARD_SETUP
290 /* Call the board-specific fixup routine */
291 ft_board_setup(*of_flat_tree
, gd
->bd
);
294 /* Delete the old LMB reservation */
295 lmb_free(lmb
, (phys_addr_t
)(u32
)*of_flat_tree
,
296 (phys_size_t
)fdt_totalsize(*of_flat_tree
));
298 ret
= fdt_resize(*of_flat_tree
);
303 if (*initrd_start
&& *initrd_end
) {
304 of_size
+= FDT_RAMDISK_OVERHEAD
;
305 fdt_set_totalsize(*of_flat_tree
, of_size
);
307 /* Create a new LMB reservation */
308 lmb_reserve(lmb
, (ulong
)*of_flat_tree
, of_size
);
310 /* fixup the initrd now that we know where it should be */
311 if (*initrd_start
&& *initrd_end
)
312 fdt_initrd(*of_flat_tree
, *initrd_start
, *initrd_end
, 1);
314 if (!ft_verify_fdt(*of_flat_tree
))
317 #endif /* CONFIG_OF_LIBFDT */
322 int do_bootm_linux(int flag
, int argc
, char * const argv
[], bootm_headers_t
*images
)
326 if (flag
& BOOTM_STATE_OS_CMDLINE
) {
327 boot_cmdline_linux(images
);
331 if (flag
& BOOTM_STATE_OS_BD_T
) {
332 boot_bd_t_linux(images
);
336 if (flag
& BOOTM_STATE_OS_PREP
) {
337 boot_prep_linux(images
);
341 if (flag
& BOOTM_STATE_OS_GO
) {
342 boot_jump_linux(images
);
346 boot_prep_linux(images
);
347 ret
= boot_body_linux(images
);
350 boot_jump_linux(images
);
355 static ulong
get_sp (void)
359 asm( "mr %0,1": "=r"(sp
) : );
363 static void set_clocks_in_mhz (bd_t
*kbd
)
367 if ((s
= getenv ("clocks_in_mhz")) != NULL
) {
368 /* convert all clock information to MHz */
369 kbd
->bi_intfreq
/= 1000000L;
370 kbd
->bi_busfreq
/= 1000000L;
371 #if defined(CONFIG_MPC8220)
372 kbd
->bi_inpfreq
/= 1000000L;
373 kbd
->bi_pcifreq
/= 1000000L;
374 kbd
->bi_pevfreq
/= 1000000L;
375 kbd
->bi_flbfreq
/= 1000000L;
376 kbd
->bi_vcofreq
/= 1000000L;
378 #if defined(CONFIG_CPM2)
379 kbd
->bi_cpmfreq
/= 1000000L;
380 kbd
->bi_brgfreq
/= 1000000L;
381 kbd
->bi_sccfreq
/= 1000000L;
382 kbd
->bi_vco
/= 1000000L;
384 #if defined(CONFIG_MPC5xxx)
385 kbd
->bi_ipbfreq
/= 1000000L;
386 kbd
->bi_pcifreq
/= 1000000L;
387 #endif /* CONFIG_MPC5xxx */