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>
21 #include <u-boot/zlib.h>
23 #include <asm/byteorder.h>
28 #if defined(CONFIG_OF_LIBFDT)
29 #include <linux/libfdt.h>
30 #include <fdt_support.h>
33 #ifdef CONFIG_SYS_INIT_RAM_LOCK
34 #include <asm/cache.h>
37 DECLARE_GLOBAL_DATA_PTR;
39 static ulong get_sp (void);
40 extern void ft_fixup_num_cores(void *blob);
41 static void set_clocks_in_mhz (bd_t *kbd);
43 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
44 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
47 static void boot_jump_linux(bootm_headers_t *images)
49 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
50 ulong r7, ulong r8, ulong r9);
51 #ifdef CONFIG_OF_LIBFDT
52 char *of_flat_tree = images->ft_addr;
55 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
56 ulong, ulong, ulong))images->ep;
57 debug("## Transferring control to Linux (at address %08lx) ...\n",
60 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
62 #ifdef CONFIG_BOOTSTAGE_FDT
63 bootstage_fdt_add_report();
65 #ifdef CONFIG_BOOTSTAGE_REPORT
69 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
70 unlock_ram_in_cache();
73 #if defined(CONFIG_OF_LIBFDT)
74 if (of_flat_tree) { /* device tree; boot new style */
76 * Linux Kernel Parameters (passing device tree):
77 * r3: pointer to the fdt
81 * r7: size of IMA in bytes
85 debug(" Booting using OF flat tree...\n");
87 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
88 env_get_bootm_mapsize(), 0, 0);
94 * Linux Kernel Parameters (passing board info data):
95 * r3: ptr to board info data
96 * r4: initrd_start or 0 if no initrd
97 * r5: initrd_end - unused if r4 is 0
98 * r6: Start of command line string
99 * r7: End of command line string
103 ulong cmd_start = images->cmdline_start;
104 ulong cmd_end = images->cmdline_end;
105 ulong initrd_start = images->initrd_start;
106 ulong initrd_end = images->initrd_end;
107 bd_t *kbd = images->kbd;
109 debug(" Booting using board info...\n");
111 (*kernel) (kbd, initrd_start, initrd_end,
112 cmd_start, cmd_end, 0, 0);
113 /* does not return */
118 void arch_lmb_reserve(struct lmb *lmb)
120 phys_size_t bootm_size;
121 ulong size, sp, bootmap_base;
123 bootmap_base = env_get_bootm_low();
124 bootm_size = env_get_bootm_size();
127 if (((u64)bootmap_base + bootm_size) >
128 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
129 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
130 if ((bootmap_base + bootm_size) > get_effective_memsize())
131 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
134 size = min(bootm_size, get_effective_memsize());
135 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
137 if (size < bootm_size) {
138 ulong base = bootmap_base + size;
139 printf("WARNING: adjusting available memory to %lx\n", size);
140 lmb_reserve(lmb, base, bootm_size - size);
144 * Booting a (Linux) kernel image
146 * Allocate space for command line and board info - the
147 * address should be as high as possible within the reach of
148 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
149 * memory, which means far enough below the current stack
153 debug("## Current stack ends at 0x%08lx\n", sp);
155 /* adjust sp by 4K to be safe */
157 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
160 cpu_mp_lmb_reserve(lmb);
166 static void boot_prep_linux(bootm_headers_t *images)
170 * if we are MP make sure to flush the device tree so any changes are
171 * made visibile to all other cores. In AMP boot scenarios the cores
172 * might not be HW cache coherent with each other.
174 flush_cache((unsigned long)images->ft_addr, images->ft_len);
178 static int boot_cmdline_linux(bootm_headers_t *images)
180 ulong of_size = images->ft_len;
181 struct lmb *lmb = &images->lmb;
182 ulong *cmd_start = &images->cmdline_start;
183 ulong *cmd_end = &images->cmdline_end;
188 /* allocate space and init command line */
189 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
191 puts("ERROR with allocation of cmdline\n");
199 static int boot_bd_t_linux(bootm_headers_t *images)
201 ulong of_size = images->ft_len;
202 struct lmb *lmb = &images->lmb;
203 bd_t **kbd = &images->kbd;
208 /* allocate space for kernel copy of board info */
209 ret = boot_get_kbd (lmb, kbd);
211 puts("ERROR with allocation of kernel bd\n");
214 set_clocks_in_mhz(*kbd);
220 static int boot_body_linux(bootm_headers_t *images)
224 /* allocate space for kernel copy of board info */
225 ret = boot_bd_t_linux(images);
229 ret = image_setup_linux(images);
236 noinline int do_bootm_linux(int flag, int argc, char *const argv[],
237 bootm_headers_t *images)
241 if (flag & BOOTM_STATE_OS_CMDLINE) {
242 boot_cmdline_linux(images);
246 if (flag & BOOTM_STATE_OS_BD_T) {
247 boot_bd_t_linux(images);
251 if (flag & BOOTM_STATE_OS_PREP) {
252 boot_prep_linux(images);
256 boot_prep_linux(images);
257 ret = boot_body_linux(images);
260 boot_jump_linux(images);
265 static ulong get_sp (void)
269 asm( "mr %0,1": "=r"(sp) : );
273 static void set_clocks_in_mhz (bd_t *kbd)
277 s = env_get("clocks_in_mhz");
279 /* convert all clock information to MHz */
280 kbd->bi_intfreq /= 1000000L;
281 kbd->bi_busfreq /= 1000000L;
282 #if defined(CONFIG_CPM2)
283 kbd->bi_cpmfreq /= 1000000L;
284 kbd->bi_brgfreq /= 1000000L;
285 kbd->bi_sccfreq /= 1000000L;
286 kbd->bi_vco /= 1000000L;
291 #if defined(CONFIG_BOOTM_VXWORKS)
292 void boot_prep_vxworks(bootm_headers_t *images)
294 #if defined(CONFIG_OF_LIBFDT)
298 if (!images->ft_addr)
301 base = (u64)gd->bd->bi_memstart;
302 size = (u64)gd->bd->bi_memsize;
304 off = fdt_path_offset(images->ft_addr, "/memory");
306 fdt_fixup_memory(images->ft_addr, base, size);
308 #if defined(CONFIG_MP)
309 #if defined(CONFIG_MPC85xx)
310 ft_fixup_cpu(images->ft_addr, base + size);
311 ft_fixup_num_cores(images->ft_addr);
312 #elif defined(CONFIG_MPC86xx)
313 off = fdt_add_mem_rsv(images->ft_addr,
314 determine_mp_bootpg(NULL), (u64)4096);
316 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
317 ft_fixup_num_cores(images->ft_addr);
319 flush_cache((unsigned long)images->ft_addr, images->ft_len);
324 void boot_jump_vxworks(bootm_headers_t *images)
326 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
327 * general purpuse registers:
329 * r3: Effective address of the device tree image
332 * r6: ePAPR magic value
333 * r7: shall be the size of the boot IMA in bytes
336 * TCR: WRC = 0, no watchdog timer reset will occur
340 ((void (*)(void *, ulong, ulong, ulong,
341 ulong, ulong, ulong))images->ep)(images->ft_addr,
342 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);