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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/init.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/linkage.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/blkdev.h> | |
57c8a661 | 24 | #include <linux/memblock.h> |
fcdb27ad | 25 | #include <linux/pm.h> |
1da177e4 LT |
26 | #include <linux/smp.h> |
27 | ||
28 | #include <asm/bootinfo.h> | |
29 | #include <asm/reboot.h> | |
5c93316c | 30 | #include <asm/setup.h> |
1da177e4 | 31 | #include <asm/sibyte/board.h> |
87353d8a | 32 | #include <asm/smp-ops.h> |
1da177e4 | 33 | |
df78b5c8 AJ |
34 | #include <asm/fw/cfe/cfe_api.h> |
35 | #include <asm/fw/cfe/cfe_error.h> | |
1da177e4 LT |
36 | |
37 | /* Max ram addressable in 32-bit segments */ | |
875d43e7 | 38 | #ifdef CONFIG_64BIT |
1da177e4 LT |
39 | #define MAX_RAM_SIZE (~0ULL) |
40 | #else | |
41 | #ifdef CONFIG_HIGHMEM | |
34adb28d | 42 | #ifdef CONFIG_PHYS_ADDR_T_64BIT |
1da177e4 LT |
43 | #define MAX_RAM_SIZE (~0ULL) |
44 | #else | |
45 | #define MAX_RAM_SIZE (0xffffffffULL) | |
46 | #endif | |
47 | #else | |
48 | #define MAX_RAM_SIZE (0x1fffffffULL) | |
49 | #endif | |
50 | #endif | |
51 | ||
52 | #define SIBYTE_MAX_MEM_REGIONS 8 | |
15d45cce RB |
53 | phys_addr_t board_mem_region_addrs[SIBYTE_MAX_MEM_REGIONS]; |
54 | phys_addr_t board_mem_region_sizes[SIBYTE_MAX_MEM_REGIONS]; | |
1da177e4 LT |
55 | unsigned int board_mem_region_count; |
56 | ||
57 | int cfe_cons_handle; | |
58 | ||
59 | #ifdef CONFIG_BLK_DEV_INITRD | |
60 | extern unsigned long initrd_start, initrd_end; | |
61 | #endif | |
62 | ||
b3f6df9f | 63 | static void __noreturn cfe_linux_exit(void *arg) |
1da177e4 LT |
64 | { |
65 | int warm = *(int *)arg; | |
66 | ||
67 | if (smp_processor_id()) { | |
68 | static int reboot_smp; | |
69 | ||
70 | /* Don't repeat the process from another CPU */ | |
71 | if (!reboot_smp) { | |
72 | /* Get CPU 0 to do the cfe_exit */ | |
73 | reboot_smp = 1; | |
8691e5a8 | 74 | smp_call_function(cfe_linux_exit, arg, 0); |
1da177e4 LT |
75 | } |
76 | } else { | |
77 | printk("Passing control back to CFE...\n"); | |
78 | cfe_exit(warm, 0); | |
79 | printk("cfe_exit returned??\n"); | |
80 | } | |
81 | while (1); | |
82 | } | |
83 | ||
b3f6df9f | 84 | static void __noreturn cfe_linux_restart(char *command) |
1da177e4 LT |
85 | { |
86 | static const int zero; | |
87 | ||
88 | cfe_linux_exit((void *)&zero); | |
89 | } | |
90 | ||
b3f6df9f | 91 | static void __noreturn cfe_linux_halt(void) |
1da177e4 LT |
92 | { |
93 | static const int one = 1; | |
94 | ||
95 | cfe_linux_exit((void *)&one); | |
96 | } | |
97 | ||
98 | static __init void prom_meminit(void) | |
99 | { | |
34adb28d | 100 | u64 addr, size, type; /* regardless of PHYS_ADDR_T_64BIT */ |
1da177e4 LT |
101 | int mem_flags = 0; |
102 | unsigned int idx; | |
103 | int rd_flag; | |
104 | #ifdef CONFIG_BLK_DEV_INITRD | |
105 | unsigned long initrd_pstart; | |
106 | unsigned long initrd_pend; | |
107 | ||
108 | initrd_pstart = CPHYSADDR(initrd_start); | |
109 | initrd_pend = CPHYSADDR(initrd_end); | |
110 | if (initrd_start && | |
111 | ((initrd_pstart > MAX_RAM_SIZE) | |
112 | || (initrd_pend > MAX_RAM_SIZE))) { | |
113 | panic("initrd out of addressable memory"); | |
114 | } | |
115 | ||
116 | #endif /* INITRD */ | |
117 | ||
118 | for (idx = 0; cfe_enummem(idx, mem_flags, &addr, &size, &type) != CFE_ERR_NOMORE; | |
119 | idx++) { | |
120 | rd_flag = 0; | |
121 | if (type == CFE_MI_AVAILABLE) { | |
122 | /* | |
123 | * See if this block contains (any portion of) the | |
124 | * ramdisk | |
125 | */ | |
126 | #ifdef CONFIG_BLK_DEV_INITRD | |
127 | if (initrd_start) { | |
128 | if ((initrd_pstart > addr) && | |
129 | (initrd_pstart < (addr + size))) { | |
130 | add_memory_region(addr, | |
70342287 RB |
131 | initrd_pstart - addr, |
132 | BOOT_MEM_RAM); | |
1da177e4 LT |
133 | rd_flag = 1; |
134 | } | |
135 | if ((initrd_pend > addr) && | |
136 | (initrd_pend < (addr + size))) { | |
137 | add_memory_region(initrd_pend, | |
138 | (addr + size) - initrd_pend, | |
139 | BOOT_MEM_RAM); | |
140 | rd_flag = 1; | |
141 | } | |
142 | } | |
143 | #endif | |
144 | if (!rd_flag) { | |
145 | if (addr > MAX_RAM_SIZE) | |
146 | continue; | |
147 | if (addr+size > MAX_RAM_SIZE) | |
148 | size = MAX_RAM_SIZE - (addr+size) + 1; | |
149 | /* | |
150 | * memcpy/__copy_user prefetch, which | |
151 | * will cause a bus error for | |
152 | * KSEG/KUSEG addrs not backed by RAM. | |
153 | * Hence, reserve some padding for the | |
154 | * prefetch distance. | |
155 | */ | |
156 | if (size > 512) | |
157 | size -= 512; | |
158 | add_memory_region(addr, size, BOOT_MEM_RAM); | |
159 | } | |
160 | board_mem_region_addrs[board_mem_region_count] = addr; | |
161 | board_mem_region_sizes[board_mem_region_count] = size; | |
162 | board_mem_region_count++; | |
163 | if (board_mem_region_count == | |
164 | SIBYTE_MAX_MEM_REGIONS) { | |
165 | /* | |
166 | * Too many regions. Need to configure more | |
167 | */ | |
168 | while(1); | |
169 | } | |
170 | } | |
171 | } | |
172 | #ifdef CONFIG_BLK_DEV_INITRD | |
173 | if (initrd_start) { | |
174 | add_memory_region(initrd_pstart, initrd_pend - initrd_pstart, | |
175 | BOOT_MEM_RESERVED); | |
176 | } | |
177 | #endif | |
178 | } | |
179 | ||
180 | #ifdef CONFIG_BLK_DEV_INITRD | |
181 | static int __init initrd_setup(char *str) | |
182 | { | |
183 | char rdarg[64]; | |
184 | int idx; | |
185 | char *tmp, *endptr; | |
186 | unsigned long initrd_size; | |
187 | ||
188 | /* Make a copy of the initrd argument so we can smash it up here */ | |
189 | for (idx = 0; idx < sizeof(rdarg)-1; idx++) { | |
190 | if (!str[idx] || (str[idx] == ' ')) break; | |
191 | rdarg[idx] = str[idx]; | |
192 | } | |
193 | ||
194 | rdarg[idx] = 0; | |
195 | str = rdarg; | |
196 | ||
197 | /* | |
198 | *Initrd location comes in the form "<hex size of ramdisk in bytes>@<location in memory>" | |
70342287 | 199 | * e.g. initrd=3abfd@80010000. This is set up by the loader. |
1da177e4 LT |
200 | */ |
201 | for (tmp = str; *tmp != '@'; tmp++) { | |
202 | if (!*tmp) { | |
203 | goto fail; | |
204 | } | |
205 | } | |
206 | *tmp = 0; | |
207 | tmp++; | |
208 | if (!*tmp) { | |
209 | goto fail; | |
210 | } | |
211 | initrd_size = simple_strtoul(str, &endptr, 16); | |
212 | if (*endptr) { | |
213 | *(tmp-1) = '@'; | |
214 | goto fail; | |
215 | } | |
216 | *(tmp-1) = '@'; | |
217 | initrd_start = simple_strtoul(tmp, &endptr, 16); | |
218 | if (*endptr) { | |
219 | goto fail; | |
220 | } | |
221 | initrd_end = initrd_start + initrd_size; | |
36a88530 | 222 | printk("Found initrd of %lx@%lx\n", initrd_size, initrd_start); |
1da177e4 LT |
223 | return 1; |
224 | fail: | |
36a88530 | 225 | printk("Bad initrd argument. Disabling initrd\n"); |
1da177e4 LT |
226 | initrd_start = 0; |
227 | initrd_end = 0; | |
228 | return 1; | |
229 | } | |
230 | ||
231 | #endif | |
232 | ||
ff2c8252 MR |
233 | extern const struct plat_smp_ops sb_smp_ops; |
234 | extern const struct plat_smp_ops bcm1480_smp_ops; | |
87353d8a | 235 | |
1da177e4 LT |
236 | /* |
237 | * prom_init is called just after the cpu type is determined, from setup_arch() | |
238 | */ | |
239 | void __init prom_init(void) | |
240 | { | |
241 | uint64_t cfe_ept, cfe_handle; | |
242 | unsigned int cfe_eptseal; | |
243 | int argc = fw_arg0; | |
244 | char **envp = (char **) fw_arg2; | |
245 | int *prom_vec = (int *) fw_arg3; | |
1da177e4 LT |
246 | |
247 | _machine_restart = cfe_linux_restart; | |
70342287 | 248 | _machine_halt = cfe_linux_halt; |
fcdb27ad | 249 | pm_power_off = cfe_linux_halt; |
1da177e4 LT |
250 | |
251 | /* | |
252 | * Check if a loader was used; if NOT, the 4 arguments are | |
253 | * what CFE gives us (handle, 0, EPT and EPTSEAL) | |
254 | */ | |
255 | if (argc < 0) { | |
256 | cfe_handle = (uint64_t)(long)argc; | |
257 | cfe_ept = (long)envp; | |
258 | cfe_eptseal = (uint32_t)(unsigned long)prom_vec; | |
259 | } else { | |
260 | if ((int32_t)(long)prom_vec < 0) { | |
261 | /* | |
262 | * Old loader; all it gives us is the handle, | |
263 | * so use the "known" entrypoint and assume | |
264 | * the seal. | |
265 | */ | |
266 | cfe_handle = (uint64_t)(long)prom_vec; | |
267 | cfe_ept = (uint64_t)((int32_t)0x9fc00500); | |
268 | cfe_eptseal = CFE_EPTSEAL; | |
269 | } else { | |
270 | /* | |
271 | * Newer loaders bundle the handle/ept/eptseal | |
272 | * Note: prom_vec is in the loader's useg | |
273 | * which is still alive in the TLB. | |
274 | */ | |
275 | cfe_handle = (uint64_t)((int32_t *)prom_vec)[0]; | |
276 | cfe_ept = (uint64_t)((int32_t *)prom_vec)[2]; | |
277 | cfe_eptseal = (unsigned int)((uint32_t *)prom_vec)[3]; | |
278 | } | |
279 | } | |
280 | if (cfe_eptseal != CFE_EPTSEAL) { | |
281 | /* too early for panic to do any good */ | |
36a88530 | 282 | printk("CFE's entrypoint seal doesn't match. Spinning."); |
1da177e4 LT |
283 | while (1) ; |
284 | } | |
285 | cfe_init(cfe_handle, cfe_ept); | |
42a3b4f2 | 286 | /* |
1da177e4 LT |
287 | * Get the handle for (at least) prom_putchar, possibly for |
288 | * boot console | |
289 | */ | |
290 | cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE); | |
7580c9c3 | 291 | if (cfe_getenv("LINUX_CMDLINE", arcs_cmdline, COMMAND_LINE_SIZE) < 0) { |
e082f188 | 292 | if (argc >= 0) { |
1da177e4 LT |
293 | /* The loader should have set the command line */ |
294 | /* too early for panic to do any good */ | |
36a88530 | 295 | printk("LINUX_CMDLINE not defined in cfe."); |
1da177e4 LT |
296 | while (1) ; |
297 | } | |
298 | } | |
299 | ||
1da177e4 LT |
300 | #ifdef CONFIG_BLK_DEV_INITRD |
301 | { | |
302 | char *ptr; | |
70342287 | 303 | /* Need to find out early whether we've got an initrd. So scan |
1da177e4 LT |
304 | the list looking now */ |
305 | for (ptr = arcs_cmdline; *ptr; ptr++) { | |
306 | while (*ptr == ' ') { | |
307 | ptr++; | |
308 | } | |
309 | if (!strncmp(ptr, "initrd=", 7)) { | |
310 | initrd_setup(ptr+7); | |
311 | break; | |
312 | } else { | |
313 | while (*ptr && (*ptr != ' ')) { | |
314 | ptr++; | |
315 | } | |
316 | } | |
317 | } | |
318 | } | |
319 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
320 | ||
321 | /* Not sure this is needed, but it's the safe way. */ | |
7580c9c3 | 322 | arcs_cmdline[COMMAND_LINE_SIZE-1] = 0; |
1da177e4 | 323 | |
1da177e4 | 324 | prom_meminit(); |
87353d8a RB |
325 | |
326 | #if defined(CONFIG_SIBYTE_BCM112X) || defined(CONFIG_SIBYTE_SB1250) | |
327 | register_smp_ops(&sb_smp_ops); | |
328 | #endif | |
329 | #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) | |
330 | register_smp_ops(&bcm1480_smp_ops); | |
331 | #endif | |
1da177e4 LT |
332 | } |
333 | ||
c44e8d5e | 334 | void __init prom_free_prom_memory(void) |
1da177e4 LT |
335 | { |
336 | /* Not sure what I'm supposed to do here. Nothing, I think */ | |
1da177e4 LT |
337 | } |
338 | ||
339 | void prom_putchar(char c) | |
340 | { | |
341 | int ret; | |
342 | ||
343 | while ((ret = cfe_write(cfe_cons_handle, &c, 1)) == 0) | |
344 | ; | |
345 | } |