1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008 Semihalf
5 * (C) Copyright 2000-2006
11 #include <bootstage.h>
21 #include <asm/global_data.h>
22 #include <u-boot/zlib.h>
24 #include <asm/byteorder.h>
29 #if defined(CONFIG_OF_LIBFDT)
30 #include <linux/libfdt.h>
31 #include <fdt_support.h>
34 #ifdef CONFIG_SYS_INIT_RAM_LOCK
35 #include <asm/cache.h>
38 DECLARE_GLOBAL_DATA_PTR;
40 static ulong get_sp (void);
41 extern void ft_fixup_num_cores(void *blob);
42 static void set_clocks_in_mhz (struct bd_info *kbd);
44 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
45 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
48 static void boot_jump_linux(bootm_headers_t *images)
50 void (*kernel)(struct bd_info *, ulong r4, ulong r5, ulong r6,
51 ulong r7, ulong r8, ulong r9);
52 #ifdef CONFIG_OF_LIBFDT
53 char *of_flat_tree = images->ft_addr;
56 kernel = (void (*)(struct bd_info *, ulong, ulong, ulong,
57 ulong, ulong, ulong))images->ep;
58 debug("## Transferring control to Linux (at address %08lx) ...\n",
61 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
63 #ifdef CONFIG_BOOTSTAGE_FDT
64 bootstage_fdt_add_report();
66 #ifdef CONFIG_BOOTSTAGE_REPORT
70 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
71 unlock_ram_in_cache();
74 #if defined(CONFIG_OF_LIBFDT)
75 if (of_flat_tree) { /* device tree; boot new style */
77 * Linux Kernel Parameters (passing device tree):
78 * r3: pointer to the fdt
82 * r7: size of IMA in bytes
86 debug(" Booting using OF flat tree...\n");
88 (*kernel) ((struct bd_info *)of_flat_tree, 0, 0, EPAPR_MAGIC,
89 env_get_bootm_mapsize(), 0, 0);
95 * Linux Kernel Parameters (passing board info data):
96 * r3: ptr to board info data
97 * r4: initrd_start or 0 if no initrd
98 * r5: initrd_end - unused if r4 is 0
99 * r6: Start of command line string
100 * r7: End of command line string
104 ulong cmd_start = images->cmdline_start;
105 ulong cmd_end = images->cmdline_end;
106 ulong initrd_start = images->initrd_start;
107 ulong initrd_end = images->initrd_end;
108 struct bd_info *kbd = images->kbd;
110 debug(" Booting using board info...\n");
112 (*kernel) (kbd, initrd_start, initrd_end,
113 cmd_start, cmd_end, 0, 0);
114 /* does not return */
119 void arch_lmb_reserve(struct lmb *lmb)
121 phys_size_t bootm_size;
122 ulong size, bootmap_base;
124 bootmap_base = env_get_bootm_low();
125 bootm_size = env_get_bootm_size();
128 if (((u64)bootmap_base + bootm_size) >
129 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
130 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
131 if ((bootmap_base + bootm_size) > get_effective_memsize())
132 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
135 size = min(bootm_size, get_effective_memsize());
136 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
138 if (size < bootm_size) {
139 ulong base = bootmap_base + size;
140 printf("WARNING: adjusting available memory from 0x%lx to 0x%llx\n",
141 size, (unsigned long long)bootm_size);
142 lmb_reserve(lmb, base, bootm_size - size);
145 arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);
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 struct bd_info **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 if (CONFIG_IS_ENABLED(LMB)) {
218 ret = image_setup_linux(images);
226 noinline int do_bootm_linux(int flag, int argc, char *const argv[],
227 bootm_headers_t *images)
231 if (flag & BOOTM_STATE_OS_CMDLINE) {
232 boot_cmdline_linux(images);
236 if (flag & BOOTM_STATE_OS_BD_T) {
237 boot_bd_t_linux(images);
241 if (flag & BOOTM_STATE_OS_PREP) {
242 boot_prep_linux(images);
246 boot_prep_linux(images);
247 ret = boot_body_linux(images);
250 boot_jump_linux(images);
255 static ulong get_sp (void)
259 asm( "mr %0,1": "=r"(sp) : );
263 static void set_clocks_in_mhz (struct bd_info *kbd)
267 s = env_get("clocks_in_mhz");
269 /* convert all clock information to MHz */
270 kbd->bi_intfreq /= 1000000L;
271 kbd->bi_busfreq /= 1000000L;
275 #if defined(CONFIG_BOOTM_VXWORKS)
276 void boot_prep_vxworks(bootm_headers_t *images)
278 #if defined(CONFIG_OF_LIBFDT)
282 if (!images->ft_addr)
285 base = (u64)gd->ram_base;
286 size = (u64)gd->ram_size;
288 off = fdt_path_offset(images->ft_addr, "/memory");
290 fdt_fixup_memory(images->ft_addr, base, size);
292 #if defined(CONFIG_MP)
293 #if defined(CONFIG_MPC85xx)
294 ft_fixup_cpu(images->ft_addr, base + size);
295 ft_fixup_num_cores(images->ft_addr);
296 #elif defined(CONFIG_MPC86xx)
297 off = fdt_add_mem_rsv(images->ft_addr,
298 determine_mp_bootpg(NULL), (u64)4096);
300 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
301 ft_fixup_num_cores(images->ft_addr);
303 flush_cache((unsigned long)images->ft_addr, images->ft_len);
308 void boot_jump_vxworks(bootm_headers_t *images)
310 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
311 * general purpuse registers:
313 * r3: Effective address of the device tree image
316 * r6: ePAPR magic value
317 * r7: shall be the size of the boot IMA in bytes
320 * TCR: WRC = 0, no watchdog timer reset will occur
324 ((void (*)(void *, ulong, ulong, ulong,
325 ulong, ulong, ulong))images->ep)(images->ft_addr,
326 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);