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.
15 #include <u-boot/zlib.h>
17 #include <environment.h>
18 #include <asm/byteorder.h>
23 #if defined(CONFIG_OF_LIBFDT)
24 #include <linux/libfdt.h>
25 #include <fdt_support.h>
28 #ifdef CONFIG_SYS_INIT_RAM_LOCK
29 #include <asm/cache.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 static ulong get_sp (void);
35 extern void ft_fixup_num_cores(void *blob);
36 static void set_clocks_in_mhz (bd_t *kbd);
38 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
39 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
42 static void boot_jump_linux(bootm_headers_t *images)
44 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
45 ulong r7, ulong r8, ulong r9);
46 #ifdef CONFIG_OF_LIBFDT
47 char *of_flat_tree = images->ft_addr;
50 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
51 ulong, ulong, ulong))images->ep;
52 debug ("## Transferring control to Linux (at address %08lx) ...\n",
55 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
57 #ifdef CONFIG_BOOTSTAGE_FDT
58 bootstage_fdt_add_report();
60 #ifdef CONFIG_BOOTSTAGE_REPORT
64 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
65 unlock_ram_in_cache();
68 #if defined(CONFIG_OF_LIBFDT)
69 if (of_flat_tree) { /* device tree; boot new style */
71 * Linux Kernel Parameters (passing device tree):
72 * r3: pointer to the fdt
76 * r7: size of IMA in bytes
80 debug (" Booting using OF flat tree...\n");
82 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
83 env_get_bootm_mapsize(), 0, 0);
89 * Linux Kernel Parameters (passing board info data):
90 * r3: ptr to board info data
91 * r4: initrd_start or 0 if no initrd
92 * r5: initrd_end - unused if r4 is 0
93 * r6: Start of command line string
94 * r7: End of command line string
98 ulong cmd_start = images->cmdline_start;
99 ulong cmd_end = images->cmdline_end;
100 ulong initrd_start = images->initrd_start;
101 ulong initrd_end = images->initrd_end;
102 bd_t *kbd = images->kbd;
104 debug (" Booting using board info...\n");
106 (*kernel) (kbd, initrd_start, initrd_end,
107 cmd_start, cmd_end, 0, 0);
108 /* does not return */
113 void arch_lmb_reserve(struct lmb *lmb)
115 phys_size_t bootm_size;
116 ulong size, sp, bootmap_base;
118 bootmap_base = env_get_bootm_low();
119 bootm_size = env_get_bootm_size();
122 if (((u64)bootmap_base + bootm_size) >
123 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
124 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
125 if ((bootmap_base + bootm_size) > get_effective_memsize())
126 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
129 size = min(bootm_size, get_effective_memsize());
130 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
132 if (size < bootm_size) {
133 ulong base = bootmap_base + size;
134 printf("WARNING: adjusting available memory to %lx\n", size);
135 lmb_reserve(lmb, base, bootm_size - size);
139 * Booting a (Linux) kernel image
141 * Allocate space for command line and board info - the
142 * address should be as high as possible within the reach of
143 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
144 * memory, which means far enough below the current stack
148 debug ("## Current stack ends at 0x%08lx\n", sp);
150 /* adjust sp by 4K to be safe */
152 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
155 cpu_mp_lmb_reserve(lmb);
161 static void boot_prep_linux(bootm_headers_t *images)
165 * if we are MP make sure to flush the device tree so any changes are
166 * made visibile to all other cores. In AMP boot scenarios the cores
167 * might not be HW cache coherent with each other.
169 flush_cache((unsigned long)images->ft_addr, images->ft_len);
173 static int boot_cmdline_linux(bootm_headers_t *images)
175 ulong of_size = images->ft_len;
176 struct lmb *lmb = &images->lmb;
177 ulong *cmd_start = &images->cmdline_start;
178 ulong *cmd_end = &images->cmdline_end;
183 /* allocate space and init command line */
184 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
186 puts("ERROR with allocation of cmdline\n");
194 static int boot_bd_t_linux(bootm_headers_t *images)
196 ulong of_size = images->ft_len;
197 struct lmb *lmb = &images->lmb;
198 bd_t **kbd = &images->kbd;
203 /* allocate space for kernel copy of board info */
204 ret = boot_get_kbd (lmb, kbd);
206 puts("ERROR with allocation of kernel bd\n");
209 set_clocks_in_mhz(*kbd);
215 static int boot_body_linux(bootm_headers_t *images)
219 /* allocate space for kernel copy of board info */
220 ret = boot_bd_t_linux(images);
224 ret = image_setup_linux(images);
232 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
236 if (flag & BOOTM_STATE_OS_CMDLINE) {
237 boot_cmdline_linux(images);
241 if (flag & BOOTM_STATE_OS_BD_T) {
242 boot_bd_t_linux(images);
246 if (flag & BOOTM_STATE_OS_PREP) {
247 boot_prep_linux(images);
251 boot_prep_linux(images);
252 ret = boot_body_linux(images);
255 boot_jump_linux(images);
260 static ulong get_sp (void)
264 asm( "mr %0,1": "=r"(sp) : );
268 static void set_clocks_in_mhz (bd_t *kbd)
272 s = env_get("clocks_in_mhz");
274 /* convert all clock information to MHz */
275 kbd->bi_intfreq /= 1000000L;
276 kbd->bi_busfreq /= 1000000L;
277 #if defined(CONFIG_CPM2)
278 kbd->bi_cpmfreq /= 1000000L;
279 kbd->bi_brgfreq /= 1000000L;
280 kbd->bi_sccfreq /= 1000000L;
281 kbd->bi_vco /= 1000000L;
286 #if defined(CONFIG_BOOTM_VXWORKS)
287 void boot_prep_vxworks(bootm_headers_t *images)
289 #if defined(CONFIG_OF_LIBFDT)
293 if (!images->ft_addr)
296 base = (u64)gd->bd->bi_memstart;
297 size = (u64)gd->bd->bi_memsize;
299 off = fdt_path_offset(images->ft_addr, "/memory");
301 fdt_fixup_memory(images->ft_addr, base, size);
303 #if defined(CONFIG_MP)
304 #if defined(CONFIG_MPC85xx)
305 ft_fixup_cpu(images->ft_addr, base + size);
306 ft_fixup_num_cores(images->ft_addr);
307 #elif defined(CONFIG_MPC86xx)
308 off = fdt_add_mem_rsv(images->ft_addr,
309 determine_mp_bootpg(NULL), (u64)4096);
311 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
312 ft_fixup_num_cores(images->ft_addr);
314 flush_cache((unsigned long)images->ft_addr, images->ft_len);
319 void boot_jump_vxworks(bootm_headers_t *images)
321 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
322 * general purpuse registers:
324 * r3: Effective address of the device tree image
327 * r6: ePAPR magic value
328 * r7: shall be the size of the boot IMA in bytes
331 * TCR: WRC = 0, no watchdog timer reset will occur
335 ((void (*)(void *, ulong, ulong, ulong,
336 ulong, ulong, ulong))images->ep)(images->ft_addr,
337 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);