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>
19 #include <u-boot/zlib.h>
21 #include <asm/byteorder.h>
26 #if defined(CONFIG_OF_LIBFDT)
27 #include <linux/libfdt.h>
28 #include <fdt_support.h>
31 #ifdef CONFIG_SYS_INIT_RAM_LOCK
32 #include <asm/cache.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 static ulong get_sp (void);
38 extern void ft_fixup_num_cores(void *blob);
39 static void set_clocks_in_mhz (bd_t *kbd);
41 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
42 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
45 static void boot_jump_linux(bootm_headers_t *images)
47 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
48 ulong r7, ulong r8, ulong r9);
49 #ifdef CONFIG_OF_LIBFDT
50 char *of_flat_tree = images->ft_addr;
53 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
54 ulong, ulong, ulong))images->ep;
55 debug ("## Transferring control to Linux (at address %08lx) ...\n",
58 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
60 #ifdef CONFIG_BOOTSTAGE_FDT
61 bootstage_fdt_add_report();
63 #ifdef CONFIG_BOOTSTAGE_REPORT
67 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
68 unlock_ram_in_cache();
71 #if defined(CONFIG_OF_LIBFDT)
72 if (of_flat_tree) { /* device tree; boot new style */
74 * Linux Kernel Parameters (passing device tree):
75 * r3: pointer to the fdt
79 * r7: size of IMA in bytes
83 debug (" Booting using OF flat tree...\n");
85 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
86 env_get_bootm_mapsize(), 0, 0);
92 * Linux Kernel Parameters (passing board info data):
93 * r3: ptr to board info data
94 * r4: initrd_start or 0 if no initrd
95 * r5: initrd_end - unused if r4 is 0
96 * r6: Start of command line string
97 * r7: End of command line string
101 ulong cmd_start = images->cmdline_start;
102 ulong cmd_end = images->cmdline_end;
103 ulong initrd_start = images->initrd_start;
104 ulong initrd_end = images->initrd_end;
105 bd_t *kbd = images->kbd;
107 debug (" Booting using board info...\n");
109 (*kernel) (kbd, initrd_start, initrd_end,
110 cmd_start, cmd_end, 0, 0);
111 /* does not return */
116 void arch_lmb_reserve(struct lmb *lmb)
118 phys_size_t bootm_size;
119 ulong size, sp, bootmap_base;
121 bootmap_base = env_get_bootm_low();
122 bootm_size = env_get_bootm_size();
125 if (((u64)bootmap_base + bootm_size) >
126 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
127 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
128 if ((bootmap_base + bootm_size) > get_effective_memsize())
129 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
132 size = min(bootm_size, get_effective_memsize());
133 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
135 if (size < bootm_size) {
136 ulong base = bootmap_base + size;
137 printf("WARNING: adjusting available memory to %lx\n", size);
138 lmb_reserve(lmb, base, bootm_size - size);
142 * Booting a (Linux) kernel image
144 * Allocate space for command line and board info - the
145 * address should be as high as possible within the reach of
146 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
147 * memory, which means far enough below the current stack
151 debug ("## Current stack ends at 0x%08lx\n", sp);
153 /* adjust sp by 4K to be safe */
155 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
158 cpu_mp_lmb_reserve(lmb);
164 static void boot_prep_linux(bootm_headers_t *images)
168 * if we are MP make sure to flush the device tree so any changes are
169 * made visibile to all other cores. In AMP boot scenarios the cores
170 * might not be HW cache coherent with each other.
172 flush_cache((unsigned long)images->ft_addr, images->ft_len);
176 static int boot_cmdline_linux(bootm_headers_t *images)
178 ulong of_size = images->ft_len;
179 struct lmb *lmb = &images->lmb;
180 ulong *cmd_start = &images->cmdline_start;
181 ulong *cmd_end = &images->cmdline_end;
186 /* allocate space and init command line */
187 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
189 puts("ERROR with allocation of cmdline\n");
197 static int boot_bd_t_linux(bootm_headers_t *images)
199 ulong of_size = images->ft_len;
200 struct lmb *lmb = &images->lmb;
201 bd_t **kbd = &images->kbd;
206 /* allocate space for kernel copy of board info */
207 ret = boot_get_kbd (lmb, kbd);
209 puts("ERROR with allocation of kernel bd\n");
212 set_clocks_in_mhz(*kbd);
218 static int boot_body_linux(bootm_headers_t *images)
222 /* allocate space for kernel copy of board info */
223 ret = boot_bd_t_linux(images);
227 ret = image_setup_linux(images);
235 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
239 if (flag & BOOTM_STATE_OS_CMDLINE) {
240 boot_cmdline_linux(images);
244 if (flag & BOOTM_STATE_OS_BD_T) {
245 boot_bd_t_linux(images);
249 if (flag & BOOTM_STATE_OS_PREP) {
250 boot_prep_linux(images);
254 boot_prep_linux(images);
255 ret = boot_body_linux(images);
258 boot_jump_linux(images);
263 static ulong get_sp (void)
267 asm( "mr %0,1": "=r"(sp) : );
271 static void set_clocks_in_mhz (bd_t *kbd)
275 s = env_get("clocks_in_mhz");
277 /* convert all clock information to MHz */
278 kbd->bi_intfreq /= 1000000L;
279 kbd->bi_busfreq /= 1000000L;
280 #if defined(CONFIG_CPM2)
281 kbd->bi_cpmfreq /= 1000000L;
282 kbd->bi_brgfreq /= 1000000L;
283 kbd->bi_sccfreq /= 1000000L;
284 kbd->bi_vco /= 1000000L;
289 #if defined(CONFIG_BOOTM_VXWORKS)
290 void boot_prep_vxworks(bootm_headers_t *images)
292 #if defined(CONFIG_OF_LIBFDT)
296 if (!images->ft_addr)
299 base = (u64)gd->bd->bi_memstart;
300 size = (u64)gd->bd->bi_memsize;
302 off = fdt_path_offset(images->ft_addr, "/memory");
304 fdt_fixup_memory(images->ft_addr, base, size);
306 #if defined(CONFIG_MP)
307 #if defined(CONFIG_MPC85xx)
308 ft_fixup_cpu(images->ft_addr, base + size);
309 ft_fixup_num_cores(images->ft_addr);
310 #elif defined(CONFIG_MPC86xx)
311 off = fdt_add_mem_rsv(images->ft_addr,
312 determine_mp_bootpg(NULL), (u64)4096);
314 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
315 ft_fixup_num_cores(images->ft_addr);
317 flush_cache((unsigned long)images->ft_addr, images->ft_len);
322 void boot_jump_vxworks(bootm_headers_t *images)
324 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
325 * general purpuse registers:
327 * r3: Effective address of the device tree image
330 * r6: ePAPR magic value
331 * r7: shall be the size of the boot IMA in bytes
334 * TCR: WRC = 0, no watchdog timer reset will occur
338 ((void (*)(void *, ulong, ulong, ulong,
339 ulong, ulong, ulong))images->ep)(images->ft_addr,
340 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);