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.
18 #include <u-boot/zlib.h>
20 #include <asm/byteorder.h>
25 #if defined(CONFIG_OF_LIBFDT)
26 #include <linux/libfdt.h>
27 #include <fdt_support.h>
30 #ifdef CONFIG_SYS_INIT_RAM_LOCK
31 #include <asm/cache.h>
34 DECLARE_GLOBAL_DATA_PTR;
36 static ulong get_sp (void);
37 extern void ft_fixup_num_cores(void *blob);
38 static void set_clocks_in_mhz (bd_t *kbd);
40 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
41 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
44 static void boot_jump_linux(bootm_headers_t *images)
46 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
47 ulong r7, ulong r8, ulong r9);
48 #ifdef CONFIG_OF_LIBFDT
49 char *of_flat_tree = images->ft_addr;
52 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
53 ulong, ulong, ulong))images->ep;
54 debug ("## Transferring control to Linux (at address %08lx) ...\n",
57 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
59 #ifdef CONFIG_BOOTSTAGE_FDT
60 bootstage_fdt_add_report();
62 #ifdef CONFIG_BOOTSTAGE_REPORT
66 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
67 unlock_ram_in_cache();
70 #if defined(CONFIG_OF_LIBFDT)
71 if (of_flat_tree) { /* device tree; boot new style */
73 * Linux Kernel Parameters (passing device tree):
74 * r3: pointer to the fdt
78 * r7: size of IMA in bytes
82 debug (" Booting using OF flat tree...\n");
84 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
85 env_get_bootm_mapsize(), 0, 0);
91 * Linux Kernel Parameters (passing board info data):
92 * r3: ptr to board info data
93 * r4: initrd_start or 0 if no initrd
94 * r5: initrd_end - unused if r4 is 0
95 * r6: Start of command line string
96 * r7: End of command line string
100 ulong cmd_start = images->cmdline_start;
101 ulong cmd_end = images->cmdline_end;
102 ulong initrd_start = images->initrd_start;
103 ulong initrd_end = images->initrd_end;
104 bd_t *kbd = images->kbd;
106 debug (" Booting using board info...\n");
108 (*kernel) (kbd, initrd_start, initrd_end,
109 cmd_start, cmd_end, 0, 0);
110 /* does not return */
115 void arch_lmb_reserve(struct lmb *lmb)
117 phys_size_t bootm_size;
118 ulong size, sp, bootmap_base;
120 bootmap_base = env_get_bootm_low();
121 bootm_size = env_get_bootm_size();
124 if (((u64)bootmap_base + bootm_size) >
125 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
126 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
127 if ((bootmap_base + bootm_size) > get_effective_memsize())
128 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
131 size = min(bootm_size, get_effective_memsize());
132 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
134 if (size < bootm_size) {
135 ulong base = bootmap_base + size;
136 printf("WARNING: adjusting available memory to %lx\n", size);
137 lmb_reserve(lmb, base, bootm_size - size);
141 * Booting a (Linux) kernel image
143 * Allocate space for command line and board info - the
144 * address should be as high as possible within the reach of
145 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
146 * memory, which means far enough below the current stack
150 debug ("## Current stack ends at 0x%08lx\n", sp);
152 /* adjust sp by 4K to be safe */
154 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
157 cpu_mp_lmb_reserve(lmb);
163 static void boot_prep_linux(bootm_headers_t *images)
167 * if we are MP make sure to flush the device tree so any changes are
168 * made visibile to all other cores. In AMP boot scenarios the cores
169 * might not be HW cache coherent with each other.
171 flush_cache((unsigned long)images->ft_addr, images->ft_len);
175 static int boot_cmdline_linux(bootm_headers_t *images)
177 ulong of_size = images->ft_len;
178 struct lmb *lmb = &images->lmb;
179 ulong *cmd_start = &images->cmdline_start;
180 ulong *cmd_end = &images->cmdline_end;
185 /* allocate space and init command line */
186 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
188 puts("ERROR with allocation of cmdline\n");
196 static int boot_bd_t_linux(bootm_headers_t *images)
198 ulong of_size = images->ft_len;
199 struct lmb *lmb = &images->lmb;
200 bd_t **kbd = &images->kbd;
205 /* allocate space for kernel copy of board info */
206 ret = boot_get_kbd (lmb, kbd);
208 puts("ERROR with allocation of kernel bd\n");
211 set_clocks_in_mhz(*kbd);
217 static int boot_body_linux(bootm_headers_t *images)
221 /* allocate space for kernel copy of board info */
222 ret = boot_bd_t_linux(images);
226 ret = image_setup_linux(images);
234 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
238 if (flag & BOOTM_STATE_OS_CMDLINE) {
239 boot_cmdline_linux(images);
243 if (flag & BOOTM_STATE_OS_BD_T) {
244 boot_bd_t_linux(images);
248 if (flag & BOOTM_STATE_OS_PREP) {
249 boot_prep_linux(images);
253 boot_prep_linux(images);
254 ret = boot_body_linux(images);
257 boot_jump_linux(images);
262 static ulong get_sp (void)
266 asm( "mr %0,1": "=r"(sp) : );
270 static void set_clocks_in_mhz (bd_t *kbd)
274 s = env_get("clocks_in_mhz");
276 /* convert all clock information to MHz */
277 kbd->bi_intfreq /= 1000000L;
278 kbd->bi_busfreq /= 1000000L;
279 #if defined(CONFIG_CPM2)
280 kbd->bi_cpmfreq /= 1000000L;
281 kbd->bi_brgfreq /= 1000000L;
282 kbd->bi_sccfreq /= 1000000L;
283 kbd->bi_vco /= 1000000L;
288 #if defined(CONFIG_BOOTM_VXWORKS)
289 void boot_prep_vxworks(bootm_headers_t *images)
291 #if defined(CONFIG_OF_LIBFDT)
295 if (!images->ft_addr)
298 base = (u64)gd->bd->bi_memstart;
299 size = (u64)gd->bd->bi_memsize;
301 off = fdt_path_offset(images->ft_addr, "/memory");
303 fdt_fixup_memory(images->ft_addr, base, size);
305 #if defined(CONFIG_MP)
306 #if defined(CONFIG_MPC85xx)
307 ft_fixup_cpu(images->ft_addr, base + size);
308 ft_fixup_num_cores(images->ft_addr);
309 #elif defined(CONFIG_MPC86xx)
310 off = fdt_add_mem_rsv(images->ft_addr,
311 determine_mp_bootpg(NULL), (u64)4096);
313 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
314 ft_fixup_num_cores(images->ft_addr);
316 flush_cache((unsigned long)images->ft_addr, images->ft_len);
321 void boot_jump_vxworks(bootm_headers_t *images)
323 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
324 * general purpuse registers:
326 * r3: Effective address of the device tree image
329 * r6: ePAPR magic value
330 * r7: shall be the size of the boot IMA in bytes
333 * TCR: WRC = 0, no watchdog timer reset will occur
337 ((void (*)(void *, ulong, ulong, ulong,
338 ulong, ulong, ulong))images->ep)(images->ft_addr,
339 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);