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)
25 #include <linux/libfdt.h>
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 static void boot_jump_linux(bootm_headers_t *images)
45 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
46 ulong r7, ulong r8, ulong r9);
47 #ifdef CONFIG_OF_LIBFDT
48 char *of_flat_tree = images->ft_addr;
51 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
52 ulong, ulong, ulong))images->ep;
53 debug ("## Transferring control to Linux (at address %08lx) ...\n",
56 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
58 #ifdef CONFIG_BOOTSTAGE_FDT
59 bootstage_fdt_add_report();
61 #ifdef CONFIG_BOOTSTAGE_REPORT
65 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
66 unlock_ram_in_cache();
69 #if defined(CONFIG_OF_LIBFDT)
70 if (of_flat_tree) { /* device tree; boot new style */
72 * Linux Kernel Parameters (passing device tree):
73 * r3: pointer to the fdt
77 * r7: size of IMA in bytes
81 debug (" Booting using OF flat tree...\n");
83 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
84 env_get_bootm_mapsize(), 0, 0);
90 * Linux Kernel Parameters (passing board info data):
91 * r3: ptr to board info data
92 * r4: initrd_start or 0 if no initrd
93 * r5: initrd_end - unused if r4 is 0
94 * r6: Start of command line string
95 * r7: End of command line string
99 ulong cmd_start = images->cmdline_start;
100 ulong cmd_end = images->cmdline_end;
101 ulong initrd_start = images->initrd_start;
102 ulong initrd_end = images->initrd_end;
103 bd_t *kbd = images->kbd;
105 debug (" Booting using board info...\n");
107 (*kernel) (kbd, initrd_start, initrd_end,
108 cmd_start, cmd_end, 0, 0);
109 /* does not return */
114 void arch_lmb_reserve(struct lmb *lmb)
116 phys_size_t bootm_size;
117 ulong size, sp, bootmap_base;
119 bootmap_base = env_get_bootm_low();
120 bootm_size = env_get_bootm_size();
123 if (((u64)bootmap_base + bootm_size) >
124 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
125 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
126 if ((bootmap_base + bootm_size) > get_effective_memsize())
127 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
130 size = min(bootm_size, get_effective_memsize());
131 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
133 if (size < bootm_size) {
134 ulong base = bootmap_base + size;
135 printf("WARNING: adjusting available memory to %lx\n", size);
136 lmb_reserve(lmb, base, bootm_size - size);
140 * Booting a (Linux) kernel image
142 * Allocate space for command line and board info - the
143 * address should be as high as possible within the reach of
144 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
145 * memory, which means far enough below the current stack
149 debug ("## Current stack ends at 0x%08lx\n", sp);
151 /* adjust sp by 4K to be safe */
153 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
156 cpu_mp_lmb_reserve(lmb);
162 static void boot_prep_linux(bootm_headers_t *images)
166 * if we are MP make sure to flush the device tree so any changes are
167 * made visibile to all other cores. In AMP boot scenarios the cores
168 * might not be HW cache coherent with each other.
170 flush_cache((unsigned long)images->ft_addr, images->ft_len);
174 static int boot_cmdline_linux(bootm_headers_t *images)
176 ulong of_size = images->ft_len;
177 struct lmb *lmb = &images->lmb;
178 ulong *cmd_start = &images->cmdline_start;
179 ulong *cmd_end = &images->cmdline_end;
184 /* allocate space and init command line */
185 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
187 puts("ERROR with allocation of cmdline\n");
195 static int boot_bd_t_linux(bootm_headers_t *images)
197 ulong of_size = images->ft_len;
198 struct lmb *lmb = &images->lmb;
199 bd_t **kbd = &images->kbd;
204 /* allocate space for kernel copy of board info */
205 ret = boot_get_kbd (lmb, kbd);
207 puts("ERROR with allocation of kernel bd\n");
210 set_clocks_in_mhz(*kbd);
216 static int boot_body_linux(bootm_headers_t *images)
220 /* allocate space for kernel copy of board info */
221 ret = boot_bd_t_linux(images);
225 ret = image_setup_linux(images);
233 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
237 if (flag & BOOTM_STATE_OS_CMDLINE) {
238 boot_cmdline_linux(images);
242 if (flag & BOOTM_STATE_OS_BD_T) {
243 boot_bd_t_linux(images);
247 if (flag & BOOTM_STATE_OS_PREP) {
248 boot_prep_linux(images);
252 boot_prep_linux(images);
253 ret = boot_body_linux(images);
256 boot_jump_linux(images);
261 static ulong get_sp (void)
265 asm( "mr %0,1": "=r"(sp) : );
269 static void set_clocks_in_mhz (bd_t *kbd)
273 s = env_get("clocks_in_mhz");
275 /* convert all clock information to MHz */
276 kbd->bi_intfreq /= 1000000L;
277 kbd->bi_busfreq /= 1000000L;
278 #if defined(CONFIG_CPM2)
279 kbd->bi_cpmfreq /= 1000000L;
280 kbd->bi_brgfreq /= 1000000L;
281 kbd->bi_sccfreq /= 1000000L;
282 kbd->bi_vco /= 1000000L;
287 #if defined(CONFIG_BOOTM_VXWORKS)
288 void boot_prep_vxworks(bootm_headers_t *images)
290 #if defined(CONFIG_OF_LIBFDT)
294 if (!images->ft_addr)
297 base = (u64)gd->bd->bi_memstart;
298 size = (u64)gd->bd->bi_memsize;
300 off = fdt_path_offset(images->ft_addr, "/memory");
302 fdt_fixup_memory(images->ft_addr, base, size);
304 #if defined(CONFIG_MP)
305 #if defined(CONFIG_MPC85xx)
306 ft_fixup_cpu(images->ft_addr, base + size);
307 ft_fixup_num_cores(images->ft_addr);
308 #elif defined(CONFIG_MPC86xx)
309 off = fdt_add_mem_rsv(images->ft_addr,
310 determine_mp_bootpg(NULL), (u64)4096);
312 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
313 ft_fixup_num_cores(images->ft_addr);
315 flush_cache((unsigned long)images->ft_addr, images->ft_len);
320 void boot_jump_vxworks(bootm_headers_t *images)
322 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
323 * general purpuse registers:
325 * r3: Effective address of the device tree image
328 * r6: ePAPR magic value
329 * r7: shall be the size of the boot IMA in bytes
332 * TCR: WRC = 0, no watchdog timer reset will occur
336 ((void (*)(void *, ulong, ulong, ulong,
337 ulong, ulong, ulong))images->ep)(images->ft_addr,
338 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);