1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008 Semihalf
5 * (C) Copyright 2000-2006
11 #include <bootstage.h>
20 #include <u-boot/zlib.h>
22 #include <asm/byteorder.h>
27 #if defined(CONFIG_OF_LIBFDT)
28 #include <linux/libfdt.h>
29 #include <fdt_support.h>
32 #ifdef CONFIG_SYS_INIT_RAM_LOCK
33 #include <asm/cache.h>
36 DECLARE_GLOBAL_DATA_PTR;
38 static ulong get_sp (void);
39 extern void ft_fixup_num_cores(void *blob);
40 static void set_clocks_in_mhz (bd_t *kbd);
42 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
43 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
46 static void boot_jump_linux(bootm_headers_t *images)
48 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
49 ulong r7, ulong r8, ulong r9);
50 #ifdef CONFIG_OF_LIBFDT
51 char *of_flat_tree = images->ft_addr;
54 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
55 ulong, ulong, ulong))images->ep;
56 debug ("## Transferring control to Linux (at address %08lx) ...\n",
59 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
61 #ifdef CONFIG_BOOTSTAGE_FDT
62 bootstage_fdt_add_report();
64 #ifdef CONFIG_BOOTSTAGE_REPORT
68 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
69 unlock_ram_in_cache();
72 #if defined(CONFIG_OF_LIBFDT)
73 if (of_flat_tree) { /* device tree; boot new style */
75 * Linux Kernel Parameters (passing device tree):
76 * r3: pointer to the fdt
80 * r7: size of IMA in bytes
84 debug (" Booting using OF flat tree...\n");
86 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
87 env_get_bootm_mapsize(), 0, 0);
93 * Linux Kernel Parameters (passing board info data):
94 * r3: ptr to board info data
95 * r4: initrd_start or 0 if no initrd
96 * r5: initrd_end - unused if r4 is 0
97 * r6: Start of command line string
98 * r7: End of command line string
102 ulong cmd_start = images->cmdline_start;
103 ulong cmd_end = images->cmdline_end;
104 ulong initrd_start = images->initrd_start;
105 ulong initrd_end = images->initrd_end;
106 bd_t *kbd = images->kbd;
108 debug (" Booting using board info...\n");
110 (*kernel) (kbd, initrd_start, initrd_end,
111 cmd_start, cmd_end, 0, 0);
112 /* does not return */
117 void arch_lmb_reserve(struct lmb *lmb)
119 phys_size_t bootm_size;
120 ulong size, sp, bootmap_base;
122 bootmap_base = env_get_bootm_low();
123 bootm_size = env_get_bootm_size();
126 if (((u64)bootmap_base + bootm_size) >
127 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
128 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
129 if ((bootmap_base + bootm_size) > get_effective_memsize())
130 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
133 size = min(bootm_size, get_effective_memsize());
134 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
136 if (size < bootm_size) {
137 ulong base = bootmap_base + size;
138 printf("WARNING: adjusting available memory to %lx\n", size);
139 lmb_reserve(lmb, base, bootm_size - size);
143 * Booting a (Linux) kernel image
145 * Allocate space for command line and board info - the
146 * address should be as high as possible within the reach of
147 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
148 * memory, which means far enough below the current stack
152 debug ("## Current stack ends at 0x%08lx\n", sp);
154 /* adjust sp by 4K to be safe */
156 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
159 cpu_mp_lmb_reserve(lmb);
165 static void boot_prep_linux(bootm_headers_t *images)
169 * if we are MP make sure to flush the device tree so any changes are
170 * made visibile to all other cores. In AMP boot scenarios the cores
171 * might not be HW cache coherent with each other.
173 flush_cache((unsigned long)images->ft_addr, images->ft_len);
177 static int boot_cmdline_linux(bootm_headers_t *images)
179 ulong of_size = images->ft_len;
180 struct lmb *lmb = &images->lmb;
181 ulong *cmd_start = &images->cmdline_start;
182 ulong *cmd_end = &images->cmdline_end;
187 /* allocate space and init command line */
188 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
190 puts("ERROR with allocation of cmdline\n");
198 static int boot_bd_t_linux(bootm_headers_t *images)
200 ulong of_size = images->ft_len;
201 struct lmb *lmb = &images->lmb;
202 bd_t **kbd = &images->kbd;
207 /* allocate space for kernel copy of board info */
208 ret = boot_get_kbd (lmb, kbd);
210 puts("ERROR with allocation of kernel bd\n");
213 set_clocks_in_mhz(*kbd);
219 static int boot_body_linux(bootm_headers_t *images)
223 /* allocate space for kernel copy of board info */
224 ret = boot_bd_t_linux(images);
228 ret = image_setup_linux(images);
235 noinline int do_bootm_linux(int flag, int argc, char *const argv[],
236 bootm_headers_t *images)
240 if (flag & BOOTM_STATE_OS_CMDLINE) {
241 boot_cmdline_linux(images);
245 if (flag & BOOTM_STATE_OS_BD_T) {
246 boot_bd_t_linux(images);
250 if (flag & BOOTM_STATE_OS_PREP) {
251 boot_prep_linux(images);
255 boot_prep_linux(images);
256 ret = boot_body_linux(images);
259 boot_jump_linux(images);
264 static ulong get_sp (void)
268 asm( "mr %0,1": "=r"(sp) : );
272 static void set_clocks_in_mhz (bd_t *kbd)
276 s = env_get("clocks_in_mhz");
278 /* convert all clock information to MHz */
279 kbd->bi_intfreq /= 1000000L;
280 kbd->bi_busfreq /= 1000000L;
281 #if defined(CONFIG_CPM2)
282 kbd->bi_cpmfreq /= 1000000L;
283 kbd->bi_brgfreq /= 1000000L;
284 kbd->bi_sccfreq /= 1000000L;
285 kbd->bi_vco /= 1000000L;
290 #if defined(CONFIG_BOOTM_VXWORKS)
291 void boot_prep_vxworks(bootm_headers_t *images)
293 #if defined(CONFIG_OF_LIBFDT)
297 if (!images->ft_addr)
300 base = (u64)gd->bd->bi_memstart;
301 size = (u64)gd->bd->bi_memsize;
303 off = fdt_path_offset(images->ft_addr, "/memory");
305 fdt_fixup_memory(images->ft_addr, base, size);
307 #if defined(CONFIG_MP)
308 #if defined(CONFIG_MPC85xx)
309 ft_fixup_cpu(images->ft_addr, base + size);
310 ft_fixup_num_cores(images->ft_addr);
311 #elif defined(CONFIG_MPC86xx)
312 off = fdt_add_mem_rsv(images->ft_addr,
313 determine_mp_bootpg(NULL), (u64)4096);
315 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
316 ft_fixup_num_cores(images->ft_addr);
318 flush_cache((unsigned long)images->ft_addr, images->ft_len);
323 void boot_jump_vxworks(bootm_headers_t *images)
325 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
326 * general purpuse registers:
328 * r3: Effective address of the device tree image
331 * r6: ePAPR magic value
332 * r7: shall be the size of the boot IMA in bytes
335 * TCR: WRC = 0, no watchdog timer reset will occur
339 ((void (*)(void *, ulong, ulong, ulong,
340 ulong, ulong, ulong))images->ep)(images->ft_addr,
341 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);