diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/sibyte/cfe/setup.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/mips/sibyte/cfe/setup.c')
-rw-r--r-- | arch/mips/sibyte/cfe/setup.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/arch/mips/sibyte/cfe/setup.c b/arch/mips/sibyte/cfe/setup.c new file mode 100644 index 000000000000..d6d0364fa760 --- /dev/null +++ b/arch/mips/sibyte/cfe/setup.c | |||
@@ -0,0 +1,358 @@ | |||
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 | |||
19 | #include <linux/config.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/kernel.h> | ||
22 | #include <linux/linkage.h> | ||
23 | #include <linux/mm.h> | ||
24 | #include <linux/blkdev.h> | ||
25 | #include <linux/bootmem.h> | ||
26 | #include <linux/smp.h> | ||
27 | |||
28 | #include <asm/bootinfo.h> | ||
29 | #include <asm/reboot.h> | ||
30 | #include <asm/sibyte/board.h> | ||
31 | |||
32 | #include "cfe_api.h" | ||
33 | #include "cfe_error.h" | ||
34 | |||
35 | /* Max ram addressable in 32-bit segments */ | ||
36 | #ifdef CONFIG_MIPS64 | ||
37 | #define MAX_RAM_SIZE (~0ULL) | ||
38 | #else | ||
39 | #ifdef CONFIG_HIGHMEM | ||
40 | #ifdef CONFIG_64BIT_PHYS_ADDR | ||
41 | #define MAX_RAM_SIZE (~0ULL) | ||
42 | #else | ||
43 | #define MAX_RAM_SIZE (0xffffffffULL) | ||
44 | #endif | ||
45 | #else | ||
46 | #define MAX_RAM_SIZE (0x1fffffffULL) | ||
47 | #endif | ||
48 | #endif | ||
49 | |||
50 | #define SIBYTE_MAX_MEM_REGIONS 8 | ||
51 | phys_t board_mem_region_addrs[SIBYTE_MAX_MEM_REGIONS]; | ||
52 | phys_t board_mem_region_sizes[SIBYTE_MAX_MEM_REGIONS]; | ||
53 | unsigned int board_mem_region_count; | ||
54 | |||
55 | int cfe_cons_handle; | ||
56 | |||
57 | #ifdef CONFIG_BLK_DEV_INITRD | ||
58 | extern unsigned long initrd_start, initrd_end; | ||
59 | #endif | ||
60 | |||
61 | #ifdef CONFIG_KGDB | ||
62 | extern int kgdb_port; | ||
63 | #endif | ||
64 | |||
65 | static void ATTRIB_NORET cfe_linux_exit(void *arg) | ||
66 | { | ||
67 | int warm = *(int *)arg; | ||
68 | |||
69 | if (smp_processor_id()) { | ||
70 | static int reboot_smp; | ||
71 | |||
72 | /* Don't repeat the process from another CPU */ | ||
73 | if (!reboot_smp) { | ||
74 | /* Get CPU 0 to do the cfe_exit */ | ||
75 | reboot_smp = 1; | ||
76 | smp_call_function(cfe_linux_exit, arg, 1, 0); | ||
77 | } | ||
78 | } else { | ||
79 | printk("Passing control back to CFE...\n"); | ||
80 | cfe_exit(warm, 0); | ||
81 | printk("cfe_exit returned??\n"); | ||
82 | } | ||
83 | while (1); | ||
84 | } | ||
85 | |||
86 | static void ATTRIB_NORET cfe_linux_restart(char *command) | ||
87 | { | ||
88 | static const int zero; | ||
89 | |||
90 | cfe_linux_exit((void *)&zero); | ||
91 | } | ||
92 | |||
93 | static void ATTRIB_NORET cfe_linux_halt(void) | ||
94 | { | ||
95 | static const int one = 1; | ||
96 | |||
97 | cfe_linux_exit((void *)&one); | ||
98 | } | ||
99 | |||
100 | static __init void prom_meminit(void) | ||
101 | { | ||
102 | u64 addr, size, type; /* regardless of 64BIT_PHYS_ADDR */ | ||
103 | int mem_flags = 0; | ||
104 | unsigned int idx; | ||
105 | int rd_flag; | ||
106 | #ifdef CONFIG_BLK_DEV_INITRD | ||
107 | unsigned long initrd_pstart; | ||
108 | unsigned long initrd_pend; | ||
109 | |||
110 | initrd_pstart = CPHYSADDR(initrd_start); | ||
111 | initrd_pend = CPHYSADDR(initrd_end); | ||
112 | if (initrd_start && | ||
113 | ((initrd_pstart > MAX_RAM_SIZE) | ||
114 | || (initrd_pend > MAX_RAM_SIZE))) { | ||
115 | panic("initrd out of addressable memory"); | ||
116 | } | ||
117 | |||
118 | #endif /* INITRD */ | ||
119 | |||
120 | for (idx = 0; cfe_enummem(idx, mem_flags, &addr, &size, &type) != CFE_ERR_NOMORE; | ||
121 | idx++) { | ||
122 | rd_flag = 0; | ||
123 | if (type == CFE_MI_AVAILABLE) { | ||
124 | /* | ||
125 | * See if this block contains (any portion of) the | ||
126 | * ramdisk | ||
127 | */ | ||
128 | #ifdef CONFIG_BLK_DEV_INITRD | ||
129 | if (initrd_start) { | ||
130 | if ((initrd_pstart > addr) && | ||
131 | (initrd_pstart < (addr + size))) { | ||
132 | add_memory_region(addr, | ||
133 | initrd_pstart - addr, | ||
134 | BOOT_MEM_RAM); | ||
135 | rd_flag = 1; | ||
136 | } | ||
137 | if ((initrd_pend > addr) && | ||
138 | (initrd_pend < (addr + size))) { | ||
139 | add_memory_region(initrd_pend, | ||
140 | (addr + size) - initrd_pend, | ||
141 | BOOT_MEM_RAM); | ||
142 | rd_flag = 1; | ||
143 | } | ||
144 | } | ||
145 | #endif | ||
146 | if (!rd_flag) { | ||
147 | if (addr > MAX_RAM_SIZE) | ||
148 | continue; | ||
149 | if (addr+size > MAX_RAM_SIZE) | ||
150 | size = MAX_RAM_SIZE - (addr+size) + 1; | ||
151 | /* | ||
152 | * memcpy/__copy_user prefetch, which | ||
153 | * will cause a bus error for | ||
154 | * KSEG/KUSEG addrs not backed by RAM. | ||
155 | * Hence, reserve some padding for the | ||
156 | * prefetch distance. | ||
157 | */ | ||
158 | if (size > 512) | ||
159 | size -= 512; | ||
160 | add_memory_region(addr, size, BOOT_MEM_RAM); | ||
161 | } | ||
162 | board_mem_region_addrs[board_mem_region_count] = addr; | ||
163 | board_mem_region_sizes[board_mem_region_count] = size; | ||
164 | board_mem_region_count++; | ||
165 | if (board_mem_region_count == | ||
166 | SIBYTE_MAX_MEM_REGIONS) { | ||
167 | /* | ||
168 | * Too many regions. Need to configure more | ||
169 | */ | ||
170 | while(1); | ||
171 | } | ||
172 | } | ||
173 | } | ||
174 | #ifdef CONFIG_BLK_DEV_INITRD | ||
175 | if (initrd_start) { | ||
176 | add_memory_region(initrd_pstart, initrd_pend - initrd_pstart, | ||
177 | BOOT_MEM_RESERVED); | ||
178 | } | ||
179 | #endif | ||
180 | } | ||
181 | |||
182 | #ifdef CONFIG_BLK_DEV_INITRD | ||
183 | static int __init initrd_setup(char *str) | ||
184 | { | ||
185 | char rdarg[64]; | ||
186 | int idx; | ||
187 | char *tmp, *endptr; | ||
188 | unsigned long initrd_size; | ||
189 | |||
190 | /* Make a copy of the initrd argument so we can smash it up here */ | ||
191 | for (idx = 0; idx < sizeof(rdarg)-1; idx++) { | ||
192 | if (!str[idx] || (str[idx] == ' ')) break; | ||
193 | rdarg[idx] = str[idx]; | ||
194 | } | ||
195 | |||
196 | rdarg[idx] = 0; | ||
197 | str = rdarg; | ||
198 | |||
199 | /* | ||
200 | *Initrd location comes in the form "<hex size of ramdisk in bytes>@<location in memory>" | ||
201 | * e.g. initrd=3abfd@80010000. This is set up by the loader. | ||
202 | */ | ||
203 | for (tmp = str; *tmp != '@'; tmp++) { | ||
204 | if (!*tmp) { | ||
205 | goto fail; | ||
206 | } | ||
207 | } | ||
208 | *tmp = 0; | ||
209 | tmp++; | ||
210 | if (!*tmp) { | ||
211 | goto fail; | ||
212 | } | ||
213 | initrd_size = simple_strtoul(str, &endptr, 16); | ||
214 | if (*endptr) { | ||
215 | *(tmp-1) = '@'; | ||
216 | goto fail; | ||
217 | } | ||
218 | *(tmp-1) = '@'; | ||
219 | initrd_start = simple_strtoul(tmp, &endptr, 16); | ||
220 | if (*endptr) { | ||
221 | goto fail; | ||
222 | } | ||
223 | initrd_end = initrd_start + initrd_size; | ||
224 | prom_printf("Found initrd of %lx@%lx\n", initrd_size, initrd_start); | ||
225 | return 1; | ||
226 | fail: | ||
227 | prom_printf("Bad initrd argument. Disabling initrd\n"); | ||
228 | initrd_start = 0; | ||
229 | initrd_end = 0; | ||
230 | return 1; | ||
231 | } | ||
232 | |||
233 | #endif | ||
234 | |||
235 | /* | ||
236 | * prom_init is called just after the cpu type is determined, from setup_arch() | ||
237 | */ | ||
238 | void __init prom_init(void) | ||
239 | { | ||
240 | uint64_t cfe_ept, cfe_handle; | ||
241 | unsigned int cfe_eptseal; | ||
242 | int argc = fw_arg0; | ||
243 | char **envp = (char **) fw_arg2; | ||
244 | int *prom_vec = (int *) fw_arg3; | ||
245 | #ifdef CONFIG_KGDB | ||
246 | char *arg; | ||
247 | #endif | ||
248 | |||
249 | _machine_restart = cfe_linux_restart; | ||
250 | _machine_halt = cfe_linux_halt; | ||
251 | _machine_power_off = cfe_linux_halt; | ||
252 | |||
253 | /* | ||
254 | * Check if a loader was used; if NOT, the 4 arguments are | ||
255 | * what CFE gives us (handle, 0, EPT and EPTSEAL) | ||
256 | */ | ||
257 | if (argc < 0) { | ||
258 | cfe_handle = (uint64_t)(long)argc; | ||
259 | cfe_ept = (long)envp; | ||
260 | cfe_eptseal = (uint32_t)(unsigned long)prom_vec; | ||
261 | } else { | ||
262 | if ((int32_t)(long)prom_vec < 0) { | ||
263 | /* | ||
264 | * Old loader; all it gives us is the handle, | ||
265 | * so use the "known" entrypoint and assume | ||
266 | * the seal. | ||
267 | */ | ||
268 | cfe_handle = (uint64_t)(long)prom_vec; | ||
269 | cfe_ept = (uint64_t)((int32_t)0x9fc00500); | ||
270 | cfe_eptseal = CFE_EPTSEAL; | ||
271 | } else { | ||
272 | /* | ||
273 | * Newer loaders bundle the handle/ept/eptseal | ||
274 | * Note: prom_vec is in the loader's useg | ||
275 | * which is still alive in the TLB. | ||
276 | */ | ||
277 | cfe_handle = (uint64_t)((int32_t *)prom_vec)[0]; | ||
278 | cfe_ept = (uint64_t)((int32_t *)prom_vec)[2]; | ||
279 | cfe_eptseal = (unsigned int)((uint32_t *)prom_vec)[3]; | ||
280 | } | ||
281 | } | ||
282 | if (cfe_eptseal != CFE_EPTSEAL) { | ||
283 | /* too early for panic to do any good */ | ||
284 | prom_printf("CFE's entrypoint seal doesn't match. Spinning."); | ||
285 | while (1) ; | ||
286 | } | ||
287 | cfe_init(cfe_handle, cfe_ept); | ||
288 | /* | ||
289 | * Get the handle for (at least) prom_putchar, possibly for | ||
290 | * boot console | ||
291 | */ | ||
292 | cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE); | ||
293 | if (cfe_getenv("LINUX_CMDLINE", arcs_cmdline, CL_SIZE) < 0) { | ||
294 | if (argc < 0) { | ||
295 | /* | ||
296 | * It's OK for direct boot to not provide a | ||
297 | * command line | ||
298 | */ | ||
299 | strcpy(arcs_cmdline, "root=/dev/ram0 "); | ||
300 | #ifdef CONFIG_SIBYTE_PTSWARM | ||
301 | strcat(arcs_cmdline, "console=ttyS0,115200 "); | ||
302 | #endif | ||
303 | } else { | ||
304 | /* The loader should have set the command line */ | ||
305 | /* too early for panic to do any good */ | ||
306 | prom_printf("LINUX_CMDLINE not defined in cfe."); | ||
307 | while (1) ; | ||
308 | } | ||
309 | } | ||
310 | |||
311 | #ifdef CONFIG_KGDB | ||
312 | if ((arg = strstr(arcs_cmdline,"kgdb=duart")) != NULL) | ||
313 | kgdb_port = (arg[10] == '0') ? 0 : 1; | ||
314 | else | ||
315 | kgdb_port = 1; | ||
316 | #endif | ||
317 | |||
318 | #ifdef CONFIG_BLK_DEV_INITRD | ||
319 | { | ||
320 | char *ptr; | ||
321 | /* Need to find out early whether we've got an initrd. So scan | ||
322 | the list looking now */ | ||
323 | for (ptr = arcs_cmdline; *ptr; ptr++) { | ||
324 | while (*ptr == ' ') { | ||
325 | ptr++; | ||
326 | } | ||
327 | if (!strncmp(ptr, "initrd=", 7)) { | ||
328 | initrd_setup(ptr+7); | ||
329 | break; | ||
330 | } else { | ||
331 | while (*ptr && (*ptr != ' ')) { | ||
332 | ptr++; | ||
333 | } | ||
334 | } | ||
335 | } | ||
336 | } | ||
337 | #endif /* CONFIG_BLK_DEV_INITRD */ | ||
338 | |||
339 | /* Not sure this is needed, but it's the safe way. */ | ||
340 | arcs_cmdline[CL_SIZE-1] = 0; | ||
341 | |||
342 | mips_machgroup = MACH_GROUP_SIBYTE; | ||
343 | prom_meminit(); | ||
344 | } | ||
345 | |||
346 | unsigned long __init prom_free_prom_memory(void) | ||
347 | { | ||
348 | /* Not sure what I'm supposed to do here. Nothing, I think */ | ||
349 | return 0; | ||
350 | } | ||
351 | |||
352 | void prom_putchar(char c) | ||
353 | { | ||
354 | int ret; | ||
355 | |||
356 | while ((ret = cfe_write(cfe_cons_handle, &c, 1)) == 0) | ||
357 | ; | ||
358 | } | ||