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>
22 #if defined(CONFIG_OF_LIBFDT)
24 #include <fdt_support.h>
27 #ifdef CONFIG_SYS_INIT_RAM_LOCK
28 #include <asm/cache.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 extern ulong get_effective_memsize(void);
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 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
58 unlock_ram_in_cache();
61 #if defined(CONFIG_OF_LIBFDT)
62 if (of_flat_tree) { /* device tree; boot new style */
64 * Linux Kernel Parameters (passing device tree):
65 * r3: pointer to the fdt
69 * r7: size of IMA in bytes
73 debug (" Booting using OF flat tree...\n");
75 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
76 getenv_bootm_mapsize(), 0, 0);
82 * Linux Kernel Parameters (passing board info data):
83 * r3: ptr to board info data
84 * r4: initrd_start or 0 if no initrd
85 * r5: initrd_end - unused if r4 is 0
86 * r6: Start of command line string
87 * r7: End of command line string
91 ulong cmd_start = images->cmdline_start;
92 ulong cmd_end = images->cmdline_end;
93 ulong initrd_start = images->initrd_start;
94 ulong initrd_end = images->initrd_end;
95 bd_t *kbd = images->kbd;
97 debug (" Booting using board info...\n");
99 (*kernel) (kbd, initrd_start, initrd_end,
100 cmd_start, cmd_end, 0, 0);
101 /* does not return */
106 void arch_lmb_reserve(struct lmb *lmb)
108 phys_size_t bootm_size;
109 ulong size, sp, bootmap_base;
111 bootmap_base = getenv_bootm_low();
112 bootm_size = getenv_bootm_size();
115 if (((u64)bootmap_base + bootm_size) >
116 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
117 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
118 if ((bootmap_base + bootm_size) > get_effective_memsize())
119 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
122 size = min(bootm_size, get_effective_memsize());
123 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
125 if (size < bootm_size) {
126 ulong base = bootmap_base + size;
127 printf("WARNING: adjusting available memory to %lx\n", size);
128 lmb_reserve(lmb, base, bootm_size - size);
132 * Booting a (Linux) kernel image
134 * Allocate space for command line and board info - the
135 * address should be as high as possible within the reach of
136 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
137 * memory, which means far enough below the current stack
141 debug ("## Current stack ends at 0x%08lx\n", sp);
143 /* adjust sp by 4K to be safe */
145 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
148 cpu_mp_lmb_reserve(lmb);
154 static void boot_prep_linux(bootm_headers_t *images)
158 * if we are MP make sure to flush the device tree so any changes are
159 * made visibile to all other cores. In AMP boot scenarios the cores
160 * might not be HW cache coherent with each other.
162 flush_cache((unsigned long)images->ft_addr, images->ft_len);
166 static int boot_cmdline_linux(bootm_headers_t *images)
168 ulong of_size = images->ft_len;
169 struct lmb *lmb = &images->lmb;
170 ulong *cmd_start = &images->cmdline_start;
171 ulong *cmd_end = &images->cmdline_end;
176 /* allocate space and init command line */
177 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
179 puts("ERROR with allocation of cmdline\n");
187 static int boot_bd_t_linux(bootm_headers_t *images)
189 ulong of_size = images->ft_len;
190 struct lmb *lmb = &images->lmb;
191 bd_t **kbd = &images->kbd;
196 /* allocate space for kernel copy of board info */
197 ret = boot_get_kbd (lmb, kbd);
199 puts("ERROR with allocation of kernel bd\n");
202 set_clocks_in_mhz(*kbd);
208 static int boot_body_linux(bootm_headers_t *images)
212 /* allocate space for kernel copy of board info */
213 ret = boot_bd_t_linux(images);
217 ret = image_setup_linux(images);
225 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
229 if (flag & BOOTM_STATE_OS_CMDLINE) {
230 boot_cmdline_linux(images);
234 if (flag & BOOTM_STATE_OS_BD_T) {
235 boot_bd_t_linux(images);
239 if (flag & BOOTM_STATE_OS_PREP) {
240 boot_prep_linux(images);
244 boot_prep_linux(images);
245 ret = boot_body_linux(images);
248 boot_jump_linux(images);
253 static ulong get_sp (void)
257 asm( "mr %0,1": "=r"(sp) : );
261 static void set_clocks_in_mhz (bd_t *kbd)
265 if ((s = getenv ("clocks_in_mhz")) != NULL) {
266 /* convert all clock information to MHz */
267 kbd->bi_intfreq /= 1000000L;
268 kbd->bi_busfreq /= 1000000L;
269 #if defined(CONFIG_CPM2)
270 kbd->bi_cpmfreq /= 1000000L;
271 kbd->bi_brgfreq /= 1000000L;
272 kbd->bi_sccfreq /= 1000000L;
273 kbd->bi_vco /= 1000000L;
275 #if defined(CONFIG_MPC5xxx)
276 kbd->bi_ipbfreq /= 1000000L;
277 kbd->bi_pcifreq /= 1000000L;
278 #endif /* CONFIG_MPC5xxx */
282 #if defined(CONFIG_BOOTM_VXWORKS)
283 void boot_prep_vxworks(bootm_headers_t *images)
285 #if defined(CONFIG_OF_LIBFDT)
289 if (!images->ft_addr)
292 base = (u64)gd->bd->bi_memstart;
293 size = (u64)gd->bd->bi_memsize;
295 off = fdt_path_offset(images->ft_addr, "/memory");
297 fdt_fixup_memory(images->ft_addr, base, size);
299 #if defined(CONFIG_MP)
300 #if defined(CONFIG_MPC85xx)
301 ft_fixup_cpu(images->ft_addr, base + size);
302 ft_fixup_num_cores(images->ft_addr);
303 #elif defined(CONFIG_MPC86xx)
304 off = fdt_add_mem_rsv(images->ft_addr,
305 determine_mp_bootpg(NULL), (u64)4096);
307 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
308 ft_fixup_num_cores(images->ft_addr);
310 flush_cache((unsigned long)images->ft_addr, images->ft_len);
315 void boot_jump_vxworks(bootm_headers_t *images)
317 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
318 * general purpuse registers:
320 * r3: Effective address of the device tree image
323 * r6: ePAPR magic value
324 * r7: shall be the size of the boot IMA in bytes
327 * TCR: WRC = 0, no watchdog timer reset will occur
331 ((void (*)(void *, ulong, ulong, ulong,
332 ulong, ulong, ulong))images->ep)(images->ft_addr,
333 0, 0, EPAPR_MAGIC, getenv_bootm_mapsize(), 0, 0);