1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008 Semihalf
5 * (C) Copyright 2000-2006
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
11 #include <bootstage.h>
20 #include <u-boot/zlib.h>
22 #include <asm/byteorder.h>
27 #if defined(CONFIG_OF_LIBFDT)
28 #include <linux/libfdt.h>
29 #include <fdt_support.h>
32 #ifdef CONFIG_SYS_INIT_RAM_LOCK
33 #include <asm/cache.h>
36 DECLARE_GLOBAL_DATA_PTR
;
38 static ulong
get_sp (void);
39 extern void ft_fixup_num_cores(void *blob
);
40 static void set_clocks_in_mhz (bd_t
*kbd
);
42 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
43 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
46 static void boot_jump_linux(bootm_headers_t
*images
)
48 void (*kernel
)(bd_t
*, ulong r4
, ulong r5
, ulong r6
,
49 ulong r7
, ulong r8
, ulong r9
);
50 #ifdef CONFIG_OF_LIBFDT
51 char *of_flat_tree
= images
->ft_addr
;
54 kernel
= (void (*)(bd_t
*, ulong
, ulong
, ulong
,
55 ulong
, ulong
, ulong
))images
->ep
;
56 debug ("## Transferring control to Linux (at address %08lx) ...\n",
59 bootstage_mark(BOOTSTAGE_ID_RUN_OS
);
61 #ifdef CONFIG_BOOTSTAGE_FDT
62 bootstage_fdt_add_report();
64 #ifdef CONFIG_BOOTSTAGE_REPORT
68 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
69 unlock_ram_in_cache();
72 #if defined(CONFIG_OF_LIBFDT)
73 if (of_flat_tree
) { /* device tree; boot new style */
75 * Linux Kernel Parameters (passing device tree):
76 * r3: pointer to the fdt
80 * r7: size of IMA in bytes
84 debug (" Booting using OF flat tree...\n");
86 (*kernel
) ((bd_t
*)of_flat_tree
, 0, 0, EPAPR_MAGIC
,
87 env_get_bootm_mapsize(), 0, 0);
93 * Linux Kernel Parameters (passing board info data):
94 * r3: ptr to board info data
95 * r4: initrd_start or 0 if no initrd
96 * r5: initrd_end - unused if r4 is 0
97 * r6: Start of command line string
98 * r7: End of command line string
102 ulong cmd_start
= images
->cmdline_start
;
103 ulong cmd_end
= images
->cmdline_end
;
104 ulong initrd_start
= images
->initrd_start
;
105 ulong initrd_end
= images
->initrd_end
;
106 bd_t
*kbd
= images
->kbd
;
108 debug (" Booting using board info...\n");
110 (*kernel
) (kbd
, initrd_start
, initrd_end
,
111 cmd_start
, cmd_end
, 0, 0);
112 /* does not return */
117 void arch_lmb_reserve(struct lmb
*lmb
)
119 phys_size_t bootm_size
;
120 ulong size
, sp
, bootmap_base
;
122 bootmap_base
= env_get_bootm_low();
123 bootm_size
= env_get_bootm_size();
126 if (((u64
)bootmap_base
+ bootm_size
) >
127 (CONFIG_SYS_SDRAM_BASE
+ (u64
)gd
->ram_size
))
128 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
129 if ((bootmap_base
+ bootm_size
) > get_effective_memsize())
130 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
133 size
= min(bootm_size
, get_effective_memsize());
134 size
= min(size
, (ulong
)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
);
136 if (size
< bootm_size
) {
137 ulong base
= bootmap_base
+ size
;
138 printf("WARNING: adjusting available memory to %lx\n", size
);
139 lmb_reserve(lmb
, base
, bootm_size
- size
);
143 * Booting a (Linux) kernel image
145 * Allocate space for command line and board info - the
146 * address should be as high as possible within the reach of
147 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
148 * memory, which means far enough below the current stack
152 debug ("## Current stack ends at 0x%08lx\n", sp
);
154 /* adjust sp by 4K to be safe */
156 lmb_reserve(lmb
, sp
, (CONFIG_SYS_SDRAM_BASE
+ get_effective_memsize() - sp
));
159 cpu_mp_lmb_reserve(lmb
);
165 static void boot_prep_linux(bootm_headers_t
*images
)
169 * if we are MP make sure to flush the device tree so any changes are
170 * made visibile to all other cores. In AMP boot scenarios the cores
171 * might not be HW cache coherent with each other.
173 flush_cache((unsigned long)images
->ft_addr
, images
->ft_len
);
177 static int boot_cmdline_linux(bootm_headers_t
*images
)
179 ulong of_size
= images
->ft_len
;
180 struct lmb
*lmb
= &images
->lmb
;
181 ulong
*cmd_start
= &images
->cmdline_start
;
182 ulong
*cmd_end
= &images
->cmdline_end
;
187 /* allocate space and init command line */
188 ret
= boot_get_cmdline (lmb
, cmd_start
, cmd_end
);
190 puts("ERROR with allocation of cmdline\n");
198 static int boot_bd_t_linux(bootm_headers_t
*images
)
200 ulong of_size
= images
->ft_len
;
201 struct lmb
*lmb
= &images
->lmb
;
202 bd_t
**kbd
= &images
->kbd
;
207 /* allocate space for kernel copy of board info */
208 ret
= boot_get_kbd (lmb
, kbd
);
210 puts("ERROR with allocation of kernel bd\n");
213 set_clocks_in_mhz(*kbd
);
219 static int boot_body_linux(bootm_headers_t
*images
)
223 /* allocate space for kernel copy of board info */
224 ret
= boot_bd_t_linux(images
);
228 ret
= image_setup_linux(images
);
235 noinline
int do_bootm_linux(int flag
, int argc
, char *const argv
[],
236 bootm_headers_t
*images
)
240 if (flag
& BOOTM_STATE_OS_CMDLINE
) {
241 boot_cmdline_linux(images
);
245 if (flag
& BOOTM_STATE_OS_BD_T
) {
246 boot_bd_t_linux(images
);
250 if (flag
& BOOTM_STATE_OS_PREP
) {
251 boot_prep_linux(images
);
255 boot_prep_linux(images
);
256 ret
= boot_body_linux(images
);
259 boot_jump_linux(images
);
264 static ulong
get_sp (void)
268 asm( "mr %0,1": "=r"(sp
) : );
272 static void set_clocks_in_mhz (bd_t
*kbd
)
276 s
= env_get("clocks_in_mhz");
278 /* convert all clock information to MHz */
279 kbd
->bi_intfreq
/= 1000000L;
280 kbd
->bi_busfreq
/= 1000000L;
281 #if defined(CONFIG_CPM2)
282 kbd
->bi_cpmfreq
/= 1000000L;
283 kbd
->bi_brgfreq
/= 1000000L;
284 kbd
->bi_sccfreq
/= 1000000L;
285 kbd
->bi_vco
/= 1000000L;
290 #if defined(CONFIG_BOOTM_VXWORKS)
291 void boot_prep_vxworks(bootm_headers_t
*images
)
293 #if defined(CONFIG_OF_LIBFDT)
297 if (!images
->ft_addr
)
300 base
= (u64
)gd
->bd
->bi_memstart
;
301 size
= (u64
)gd
->bd
->bi_memsize
;
303 off
= fdt_path_offset(images
->ft_addr
, "/memory");
305 fdt_fixup_memory(images
->ft_addr
, base
, size
);
307 #if defined(CONFIG_MP)
308 #if defined(CONFIG_MPC85xx)
309 ft_fixup_cpu(images
->ft_addr
, base
+ size
);
310 ft_fixup_num_cores(images
->ft_addr
);
311 #elif defined(CONFIG_MPC86xx)
312 off
= fdt_add_mem_rsv(images
->ft_addr
,
313 determine_mp_bootpg(NULL
), (u64
)4096);
315 printf("## WARNING %s: %s\n", __func__
, fdt_strerror(off
));
316 ft_fixup_num_cores(images
->ft_addr
);
318 flush_cache((unsigned long)images
->ft_addr
, images
->ft_len
);
323 void boot_jump_vxworks(bootm_headers_t
*images
)
325 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
326 * general purpuse registers:
328 * r3: Effective address of the device tree image
331 * r6: ePAPR magic value
332 * r7: shall be the size of the boot IMA in bytes
335 * TCR: WRC = 0, no watchdog timer reset will occur
339 ((void (*)(void *, ulong
, ulong
, ulong
,
340 ulong
, ulong
, ulong
))images
->ep
)(images
->ft_addr
,
341 0, 0, EPAPR_MAGIC
, env_get_bootm_mapsize(), 0, 0);