1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2008 Semihalf
4 *
5 * (C) Copyright 2000-2006
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 */
8
9
10 #include <common.h>
11 #include <bootstage.h>
12 #include <cpu_func.h>
13 #include <env.h>
14 #include <init.h>
15 #include <lmb.h>
16 #include <log.h>
17 #include <watchdog.h>
18 #include <command.h>
19 #include <image.h>
20 #include <malloc.h>
21 #include <asm/global_data.h>
22 #include <u-boot/zlib.h>
23 #include <bzlib.h>
24 #include <asm/byteorder.h>
25 #include <asm/mp.h>
26 #include <bootm.h>
27 #include <vxworks.h>
28
29 #if defined(CONFIG_OF_LIBFDT)
30 #include <linux/libfdt.h>
31 #include <fdt_support.h>
32 #endif
33
34 #ifdef CONFIG_SYS_INIT_RAM_LOCK
35 #include <asm/cache.h>
36 #endif
37
38 DECLARE_GLOBAL_DATA_PTR;
39
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);
43
44 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
45 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
46 #endif
47
boot_jump_linux(bootm_headers_t * images)48 static void boot_jump_linux(bootm_headers_t *images)
49 {
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;
54 #endif
55
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",
59 (ulong)kernel);
60
61 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
62
63 #ifdef CONFIG_BOOTSTAGE_FDT
64 bootstage_fdt_add_report();
65 #endif
66 #ifdef CONFIG_BOOTSTAGE_REPORT
67 bootstage_report();
68 #endif
69
70 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
71 unlock_ram_in_cache();
72 #endif
73
74 #if defined(CONFIG_OF_LIBFDT)
75 if (of_flat_tree) { /* device tree; boot new style */
76 /*
77 * Linux Kernel Parameters (passing device tree):
78 * r3: pointer to the fdt
79 * r4: 0
80 * r5: 0
81 * r6: epapr magic
82 * r7: size of IMA in bytes
83 * r8: 0
84 * r9: 0
85 */
86 debug(" Booting using OF flat tree...\n");
87 WATCHDOG_RESET ();
88 (*kernel) ((struct bd_info *)of_flat_tree, 0, 0, EPAPR_MAGIC,
89 env_get_bootm_mapsize(), 0, 0);
90 /* does not return */
91 } else
92 #endif
93 {
94 /*
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
101 * r8: 0
102 * r9: 0
103 */
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;
109
110 debug(" Booting using board info...\n");
111 WATCHDOG_RESET ();
112 (*kernel) (kbd, initrd_start, initrd_end,
113 cmd_start, cmd_end, 0, 0);
114 /* does not return */
115 }
116 return ;
117 }
118
arch_lmb_reserve(struct lmb * lmb)119 void arch_lmb_reserve(struct lmb *lmb)
120 {
121 phys_size_t bootm_size;
122 ulong size, bootmap_base;
123
124 bootmap_base = env_get_bootm_low();
125 bootm_size = env_get_bootm_size();
126
127 #ifdef DEBUG
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");
133 #endif
134
135 size = min(bootm_size, get_effective_memsize());
136 size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
137
138 if (size < bootm_size) {
139 ulong base = bootmap_base + size;
140 printf("WARNING: adjusting available memory to %lx\n", size);
141 lmb_reserve(lmb, base, bootm_size - size);
142 }
143
144 arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);
145
146 #ifdef CONFIG_MP
147 cpu_mp_lmb_reserve(lmb);
148 #endif
149
150 return ;
151 }
152
boot_prep_linux(bootm_headers_t * images)153 static void boot_prep_linux(bootm_headers_t *images)
154 {
155 #ifdef CONFIG_MP
156 /*
157 * if we are MP make sure to flush the device tree so any changes are
158 * made visibile to all other cores. In AMP boot scenarios the cores
159 * might not be HW cache coherent with each other.
160 */
161 flush_cache((unsigned long)images->ft_addr, images->ft_len);
162 #endif
163 }
164
boot_cmdline_linux(bootm_headers_t * images)165 static int boot_cmdline_linux(bootm_headers_t *images)
166 {
167 ulong of_size = images->ft_len;
168 struct lmb *lmb = &images->lmb;
169 ulong *cmd_start = &images->cmdline_start;
170 ulong *cmd_end = &images->cmdline_end;
171
172 int ret = 0;
173
174 if (!of_size) {
175 /* allocate space and init command line */
176 ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
177 if (ret) {
178 puts("ERROR with allocation of cmdline\n");
179 return ret;
180 }
181 }
182
183 return ret;
184 }
185
boot_bd_t_linux(bootm_headers_t * images)186 static int boot_bd_t_linux(bootm_headers_t *images)
187 {
188 ulong of_size = images->ft_len;
189 struct lmb *lmb = &images->lmb;
190 struct bd_info **kbd = &images->kbd;
191
192 int ret = 0;
193
194 if (!of_size) {
195 /* allocate space for kernel copy of board info */
196 ret = boot_get_kbd (lmb, kbd);
197 if (ret) {
198 puts("ERROR with allocation of kernel bd\n");
199 return ret;
200 }
201 set_clocks_in_mhz(*kbd);
202 }
203
204 return ret;
205 }
206
boot_body_linux(bootm_headers_t * images)207 static int boot_body_linux(bootm_headers_t *images)
208 {
209 int ret;
210
211 /* allocate space for kernel copy of board info */
212 ret = boot_bd_t_linux(images);
213 if (ret)
214 return ret;
215
216 ret = image_setup_linux(images);
217 if (ret)
218 return ret;
219
220 return 0;
221 }
222
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)223 noinline int do_bootm_linux(int flag, int argc, char *const argv[],
224 bootm_headers_t *images)
225 {
226 int ret;
227
228 if (flag & BOOTM_STATE_OS_CMDLINE) {
229 boot_cmdline_linux(images);
230 return 0;
231 }
232
233 if (flag & BOOTM_STATE_OS_BD_T) {
234 boot_bd_t_linux(images);
235 return 0;
236 }
237
238 if (flag & BOOTM_STATE_OS_PREP) {
239 boot_prep_linux(images);
240 return 0;
241 }
242
243 boot_prep_linux(images);
244 ret = boot_body_linux(images);
245 if (ret)
246 return ret;
247 boot_jump_linux(images);
248
249 return 0;
250 }
251
get_sp(void)252 static ulong get_sp (void)
253 {
254 ulong sp;
255
256 asm( "mr %0,1": "=r"(sp) : );
257 return sp;
258 }
259
set_clocks_in_mhz(struct bd_info * kbd)260 static void set_clocks_in_mhz (struct bd_info *kbd)
261 {
262 char *s;
263
264 s = env_get("clocks_in_mhz");
265 if (s) {
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;
274 #endif
275 }
276 }
277
278 #if defined(CONFIG_BOOTM_VXWORKS)
boot_prep_vxworks(bootm_headers_t * images)279 void boot_prep_vxworks(bootm_headers_t *images)
280 {
281 #if defined(CONFIG_OF_LIBFDT)
282 int off;
283 u64 base, size;
284
285 if (!images->ft_addr)
286 return;
287
288 base = (u64)gd->ram_base;
289 size = (u64)gd->ram_size;
290
291 off = fdt_path_offset(images->ft_addr, "/memory");
292 if (off < 0)
293 fdt_fixup_memory(images->ft_addr, base, size);
294
295 #if defined(CONFIG_MP)
296 #if defined(CONFIG_MPC85xx)
297 ft_fixup_cpu(images->ft_addr, base + size);
298 ft_fixup_num_cores(images->ft_addr);
299 #elif defined(CONFIG_MPC86xx)
300 off = fdt_add_mem_rsv(images->ft_addr,
301 determine_mp_bootpg(NULL), (u64)4096);
302 if (off < 0)
303 printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
304 ft_fixup_num_cores(images->ft_addr);
305 #endif
306 flush_cache((unsigned long)images->ft_addr, images->ft_len);
307 #endif
308 #endif
309 }
310
boot_jump_vxworks(bootm_headers_t * images)311 void boot_jump_vxworks(bootm_headers_t *images)
312 {
313 /* PowerPC VxWorks boot interface conforms to the ePAPR standard
314 * general purpuse registers:
315 *
316 * r3: Effective address of the device tree image
317 * r4: 0
318 * r5: 0
319 * r6: ePAPR magic value
320 * r7: shall be the size of the boot IMA in bytes
321 * r8: 0
322 * r9: 0
323 * TCR: WRC = 0, no watchdog timer reset will occur
324 */
325 WATCHDOG_RESET();
326
327 ((void (*)(void *, ulong, ulong, ulong,
328 ulong, ulong, ulong))images->ep)(images->ft_addr,
329 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);
330 }
331 #endif
332