2 * (C) Copyright 2008 Semihalf
4 * (C) Copyright 2000-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * SPDX-License-Identifier: GPL-2.0+
16 #include <u-boot/zlib.h>
18 #include <environment.h>
19 #include <asm/byteorder.h>
24 #if defined(CONFIG_OF_LIBFDT)
26 #include <fdt_support.h>
29 #ifdef CONFIG_SYS_INIT_RAM_LOCK
30 #include <asm/cache.h>
33 DECLARE_GLOBAL_DATA_PTR;
35 static ulong get_sp (void);
36 extern void ft_fixup_num_cores(void *blob);
37 static void set_clocks_in_mhz (bd_t *kbd);
39 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
40 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
43 int arch_fixup_fdt(void *blob)
48 static void boot_jump_linux(bootm_headers_t *images)
50 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
51 ulong r7, ulong r8, ulong r9);
52 #ifdef CONFIG_OF_LIBFDT
53 char *of_flat_tree = images->ft_addr;
56 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
57 ulong, ulong, ulong))images->ep;
58 debug ("## Transferring control to Linux (at address %08lx) ...\n",
61 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
63 #ifdef CONFIG_BOOTSTAGE_FDT
64 bootstage_fdt_add_report();
66 #ifdef CONFIG_BOOTSTAGE_REPORT
70 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
71 unlock_ram_in_cache();
74 #if defined(CONFIG_OF_LIBFDT)
75 if (of_flat_tree) { /* device tree; boot new style */
77 * Linux Kernel Parameters (passing device tree):
78 * r3: pointer to the fdt
82 * r7: size of IMA in bytes
86 debug (" Booting using OF flat tree...\n");
88 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
89 env_get_bootm_mapsize(), 0, 0);
95 * Linux Kernel Parameters (passing board info data):
96 * r3: ptr to board info data
97 * r4: initrd_start or 0 if no initrd
98 * r5: initrd_end - unused if r4 is 0
99 * r6: Start of command line string
100 * r7: End of command line string
104 ulong cmd_start = images->cmdline_start;
105 ulong cmd_end = images->cmdline_end;
106 ulong initrd_start = images->initrd_start;
107 ulong initrd_end = images->initrd_end;
108 bd_t *kbd = images->kbd;
110 debug (" Booting using board info...\n");
112 (*kernel) (kbd, initrd_start, initrd_end,
113 cmd_start, cmd_end, 0, 0);
114 /* does not return */
119 void arch_lmb_reserve(struct lmb *lmb)
121 phys_size_t bootm_size;
122 ulong size, sp, bootmap_base;
124 bootmap_base = env_get_bootm_low();
125 bootm_size = env_get_bootm_size();
128 if (((u64)bootmap_base + bootm_size) >
129 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
130 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
131 if ((bootmap_base + bootm_size) > get_effective_memsize())
132 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
135 size = min(bootm_size, get_effective_memsize());
136 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
138 if (size < bootm_size) {
139 ulong base = bootmap_base + size;
140 printf("WARNING: adjusting available memory to %lx\n", size);
141 lmb_reserve(lmb, base, bootm_size - size);
145 * Booting a (Linux) kernel image
147 * Allocate space for command line and board info - the
148 * address should be as high as possible within the reach of
149 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
150 * memory, which means far enough below the current stack
154 debug ("## Current stack ends at 0x%08lx\n", sp);
156 /* adjust sp by 4K to be safe */
158 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
161 cpu_mp_lmb_reserve(lmb);
167 static void boot_prep_linux(bootm_headers_t *images)
171 * if we are MP make sure to flush the device tree so any changes are
172 * made visibile to all other cores. In AMP boot scenarios the cores
173 * might not be HW cache coherent with each other.
175 flush_cache((unsigned long)images->ft_addr, images->ft_len);
179 static int boot_cmdline_linux(bootm_headers_t *images)
181 ulong of_size = images->ft_len;
182 struct lmb *lmb = &images->lmb;
183 ulong *cmd_start = &images->cmdline_start;
184 ulong *cmd_end = &images->cmdline_end;
189 /* allocate space and init command line */
190 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
192 puts("ERROR with allocation of cmdline\n");
200 static int boot_bd_t_linux(bootm_headers_t *images)
202 ulong of_size = images->ft_len;
203 struct lmb *lmb = &images->lmb;
204 bd_t **kbd = &images->kbd;
209 /* allocate space for kernel copy of board info */
210 ret = boot_get_kbd (lmb, kbd);
212 puts("ERROR with allocation of kernel bd\n");
215 set_clocks_in_mhz(*kbd);
221 static int boot_body_linux(bootm_headers_t *images)
225 /* allocate space for kernel copy of board info */
226 ret = boot_bd_t_linux(images);
230 ret = image_setup_linux(images);
238 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
242 if (flag & BOOTM_STATE_OS_CMDLINE) {
243 boot_cmdline_linux(images);
247 if (flag & BOOTM_STATE_OS_BD_T) {
248 boot_bd_t_linux(images);
252 if (flag & BOOTM_STATE_OS_PREP) {
253 boot_prep_linux(images);
257 boot_prep_linux(images);
258 ret = boot_body_linux(images);
261 boot_jump_linux(images);
266 static ulong get_sp (void)
270 asm( "mr %0,1": "=r"(sp) : );
274 static void set_clocks_in_mhz (bd_t *kbd)
278 s = env_get("clocks_in_mhz");
280 /* convert all clock information to MHz */
281 kbd->bi_intfreq /= 1000000L;
282 kbd->bi_busfreq /= 1000000L;
283 #if defined(CONFIG_CPM2)
284 kbd->bi_cpmfreq /= 1000000L;
285 kbd->bi_brgfreq /= 1000000L;
286 kbd->bi_sccfreq /= 1000000L;
287 kbd->bi_vco /= 1000000L;
292 #if defined(CONFIG_BOOTM_VXWORKS)
293 void boot_prep_vxworks(bootm_headers_t *images)
295 #if defined(CONFIG_OF_LIBFDT)
299 if (!images->ft_addr)
302 base = (u64)gd->bd->bi_memstart;
303 size = (u64)gd->bd->bi_memsize;
305 off = fdt_path_offset(images->ft_addr, "/memory");
307 fdt_fixup_memory(images->ft_addr, base, size);
309 #if defined(CONFIG_MP)
310 #if defined(CONFIG_MPC85xx)
311 ft_fixup_cpu(images->ft_addr, base + size);
312 ft_fixup_num_cores(images->ft_addr);
313 #elif defined(CONFIG_MPC86xx)
314 off = fdt_add_mem_rsv(images->ft_addr,
315 determine_mp_bootpg(NULL), (u64)4096);
317 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
318 ft_fixup_num_cores(images->ft_addr);
320 flush_cache((unsigned long)images->ft_addr, images->ft_len);
325 void boot_jump_vxworks(bootm_headers_t *images)
327 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
328 * general purpuse registers:
330 * r3: Effective address of the device tree image
333 * r6: ePAPR magic value
334 * r7: shall be the size of the boot IMA in bytes
337 * TCR: WRC = 0, no watchdog timer reset will occur
341 ((void (*)(void *, ulong, ulong, ulong,
342 ulong, ulong, ulong))images->ep)(images->ft_addr,
343 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);