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 static ulong get_sp (void);
34 extern void ft_fixup_num_cores(void *blob);
35 static void set_clocks_in_mhz (bd_t *kbd);
37 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
38 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
41 static void boot_jump_linux(bootm_headers_t *images)
43 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
44 ulong r7, ulong r8, ulong r9);
45 #ifdef CONFIG_OF_LIBFDT
46 char *of_flat_tree = images->ft_addr;
49 kernel = (void (*)(bd_t *, ulong, ulong, ulong,
50 ulong, ulong, ulong))images->ep;
51 debug ("## Transferring control to Linux (at address %08lx) ...\n",
54 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
56 #ifdef CONFIG_BOOTSTAGE_FDT
57 bootstage_fdt_add_report();
59 #ifdef CONFIG_BOOTSTAGE_REPORT
63 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
64 unlock_ram_in_cache();
67 #if defined(CONFIG_OF_LIBFDT)
68 if (of_flat_tree) { /* device tree; boot new style */
70 * Linux Kernel Parameters (passing device tree):
71 * r3: pointer to the fdt
75 * r7: size of IMA in bytes
79 debug (" Booting using OF flat tree...\n");
81 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
82 getenv_bootm_mapsize(), 0, 0);
88 * Linux Kernel Parameters (passing board info data):
89 * r3: ptr to board info data
90 * r4: initrd_start or 0 if no initrd
91 * r5: initrd_end - unused if r4 is 0
92 * r6: Start of command line string
93 * r7: End of command line string
97 ulong cmd_start = images->cmdline_start;
98 ulong cmd_end = images->cmdline_end;
99 ulong initrd_start = images->initrd_start;
100 ulong initrd_end = images->initrd_end;
101 bd_t *kbd = images->kbd;
103 debug (" Booting using board info...\n");
105 (*kernel) (kbd, initrd_start, initrd_end,
106 cmd_start, cmd_end, 0, 0);
107 /* does not return */
112 void arch_lmb_reserve(struct lmb *lmb)
114 phys_size_t bootm_size;
115 ulong size, sp, bootmap_base;
117 bootmap_base = getenv_bootm_low();
118 bootm_size = getenv_bootm_size();
121 if (((u64)bootmap_base + bootm_size) >
122 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
123 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
124 if ((bootmap_base + bootm_size) > get_effective_memsize())
125 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
128 size = min(bootm_size, get_effective_memsize());
129 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
131 if (size < bootm_size) {
132 ulong base = bootmap_base + size;
133 printf("WARNING: adjusting available memory to %lx\n", size);
134 lmb_reserve(lmb, base, bootm_size - size);
138 * Booting a (Linux) kernel image
140 * Allocate space for command line and board info - the
141 * address should be as high as possible within the reach of
142 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
143 * memory, which means far enough below the current stack
147 debug ("## Current stack ends at 0x%08lx\n", sp);
149 /* adjust sp by 4K to be safe */
151 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
154 cpu_mp_lmb_reserve(lmb);
160 static void boot_prep_linux(bootm_headers_t *images)
164 * if we are MP make sure to flush the device tree so any changes are
165 * made visibile to all other cores. In AMP boot scenarios the cores
166 * might not be HW cache coherent with each other.
168 flush_cache((unsigned long)images->ft_addr, images->ft_len);
172 static int boot_cmdline_linux(bootm_headers_t *images)
174 ulong of_size = images->ft_len;
175 struct lmb *lmb = &images->lmb;
176 ulong *cmd_start = &images->cmdline_start;
177 ulong *cmd_end = &images->cmdline_end;
182 /* allocate space and init command line */
183 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
185 puts("ERROR with allocation of cmdline\n");
193 static int boot_bd_t_linux(bootm_headers_t *images)
195 ulong of_size = images->ft_len;
196 struct lmb *lmb = &images->lmb;
197 bd_t **kbd = &images->kbd;
202 /* allocate space for kernel copy of board info */
203 ret = boot_get_kbd (lmb, kbd);
205 puts("ERROR with allocation of kernel bd\n");
208 set_clocks_in_mhz(*kbd);
214 static int boot_body_linux(bootm_headers_t *images)
218 /* allocate space for kernel copy of board info */
219 ret = boot_bd_t_linux(images);
223 ret = image_setup_linux(images);
231 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
235 if (flag & BOOTM_STATE_OS_CMDLINE) {
236 boot_cmdline_linux(images);
240 if (flag & BOOTM_STATE_OS_BD_T) {
241 boot_bd_t_linux(images);
245 if (flag & BOOTM_STATE_OS_PREP) {
246 boot_prep_linux(images);
250 boot_prep_linux(images);
251 ret = boot_body_linux(images);
254 boot_jump_linux(images);
259 static ulong get_sp (void)
263 asm( "mr %0,1": "=r"(sp) : );
267 static void set_clocks_in_mhz (bd_t *kbd)
271 if ((s = getenv ("clocks_in_mhz")) != NULL) {
272 /* convert all clock information to MHz */
273 kbd->bi_intfreq /= 1000000L;
274 kbd->bi_busfreq /= 1000000L;
275 #if defined(CONFIG_CPM2)
276 kbd->bi_cpmfreq /= 1000000L;
277 kbd->bi_brgfreq /= 1000000L;
278 kbd->bi_sccfreq /= 1000000L;
279 kbd->bi_vco /= 1000000L;
281 #if defined(CONFIG_MPC5xxx)
282 kbd->bi_ipbfreq /= 1000000L;
283 kbd->bi_pcifreq /= 1000000L;
284 #endif /* CONFIG_MPC5xxx */
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, getenv_bootm_mapsize(), 0, 0);