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9#include <linux/errno.h>
10#include <linux/sched.h>
11#include <linux/kernel.h>
12#include <linux/mm.h>
13#include <linux/stddef.h>
14#include <linux/unistd.h>
15#include <linux/ptrace.h>
16#include <linux/slab.h>
17#include <linux/initrd.h>
18#include <asm/smp.h>
19#include <linux/user.h>
20#include <linux/screen_info.h>
21#include <linux/delay.h>
22#include <linux/fs.h>
23#include <linux/seq_file.h>
24#include <linux/syscalls.h>
25#include <linux/kdev_t.h>
26#include <linux/major.h>
27#include <linux/string.h>
28#include <linux/init.h>
29#include <linux/interrupt.h>
30#include <linux/console.h>
31#include <linux/spinlock.h>
32#include <linux/root_dev.h>
33#include <linux/cpu.h>
34#include <linux/kdebug.h>
35#include <linux/export.h>
36#include <linux/start_kernel.h>
37#include <uapi/linux/mount.h>
38
39#include <asm/io.h>
40#include <asm/processor.h>
41#include <asm/oplib.h>
42#include <asm/page.h>
43#include <asm/traps.h>
44#include <asm/vaddrs.h>
45#include <asm/mbus.h>
46#include <asm/idprom.h>
47#include <asm/cpudata.h>
48#include <asm/setup.h>
49#include <asm/cacheflush.h>
50#include <asm/sections.h>
51
52#include "kernel.h"
53
54struct screen_info screen_info = {
55 0, 0,
56 0,
57 0,
58 0,
59 128,
60 0,0,0,
61 54,
62 0,
63 16
64};
65
66
67
68
69
70
71
72
73static void prom_sync_me(void)
74{
75 unsigned long prom_tbr, flags;
76
77
78 local_irq_save(flags);
79 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
80 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
81 "nop\n\t"
82 "nop\n\t"
83 "nop\n\t" : : "r" (&trapbase));
84
85 prom_printf("PROM SYNC COMMAND...\n");
86 show_free_areas(0, NULL);
87 if (!is_idle_task(current)) {
88 local_irq_enable();
89 ksys_sync();
90 local_irq_disable();
91 }
92 prom_printf("Returning to prom\n");
93
94 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
95 "nop\n\t"
96 "nop\n\t"
97 "nop\n\t" : : "r" (prom_tbr));
98 local_irq_restore(flags);
99}
100
101static unsigned int boot_flags __initdata = 0;
102#define BOOTME_DEBUG 0x1
103
104
105unsigned long cmdline_memory_size __initdata = 0;
106
107
108unsigned char boot_cpu_id = 0xff;
109
110static void
111prom_console_write(struct console *con, const char *s, unsigned int n)
112{
113 prom_write(s, n);
114}
115
116static struct console prom_early_console = {
117 .name = "earlyprom",
118 .write = prom_console_write,
119 .flags = CON_PRINTBUFFER | CON_BOOT,
120 .index = -1,
121};
122
123
124
125
126
127static void __init process_switch(char c)
128{
129 switch (c) {
130 case 'd':
131 boot_flags |= BOOTME_DEBUG;
132 break;
133 case 's':
134 break;
135 case 'h':
136 prom_printf("boot_flags_init: Halt!\n");
137 prom_halt();
138 break;
139 case 'p':
140 prom_early_console.flags &= ~CON_BOOT;
141 break;
142 default:
143 printk("Unknown boot switch (-%c)\n", c);
144 break;
145 }
146}
147
148static void __init boot_flags_init(char *commands)
149{
150 while (*commands) {
151
152 while (*commands == ' ')
153 commands++;
154
155
156 if (*commands == '\0')
157 break;
158 if (*commands == '-') {
159 commands++;
160 while (*commands && *commands != ' ')
161 process_switch(*commands++);
162 continue;
163 }
164 if (!strncmp(commands, "mem=", 4)) {
165
166
167
168
169 cmdline_memory_size = simple_strtoul(commands + 4,
170 &commands, 0);
171 if (*commands == 'K' || *commands == 'k') {
172 cmdline_memory_size <<= 10;
173 commands++;
174 } else if (*commands=='M' || *commands=='m') {
175 cmdline_memory_size <<= 20;
176 commands++;
177 }
178 }
179 while (*commands && *commands != ' ')
180 commands++;
181 }
182}
183
184extern unsigned short root_flags;
185extern unsigned short root_dev;
186extern unsigned short ram_flags;
187#define RAMDISK_IMAGE_START_MASK 0x07FF
188#define RAMDISK_PROMPT_FLAG 0x8000
189#define RAMDISK_LOAD_FLAG 0x4000
190
191extern int root_mountflags;
192
193char reboot_command[COMMAND_LINE_SIZE];
194
195struct cpuid_patch_entry {
196 unsigned int addr;
197 unsigned int sun4d[3];
198 unsigned int leon[3];
199};
200extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
201
202static void __init per_cpu_patch(void)
203{
204 struct cpuid_patch_entry *p;
205
206 if (sparc_cpu_model == sun4m) {
207
208
209
210 return;
211 }
212
213 p = &__cpuid_patch;
214 while (p < &__cpuid_patch_end) {
215 unsigned long addr = p->addr;
216 unsigned int *insns;
217
218 switch (sparc_cpu_model) {
219 case sun4d:
220 insns = &p->sun4d[0];
221 break;
222
223 case sparc_leon:
224 insns = &p->leon[0];
225 break;
226 default:
227 prom_printf("Unknown cpu type, halting.\n");
228 prom_halt();
229 }
230 *(unsigned int *) (addr + 0) = insns[0];
231 flushi(addr + 0);
232 *(unsigned int *) (addr + 4) = insns[1];
233 flushi(addr + 4);
234 *(unsigned int *) (addr + 8) = insns[2];
235 flushi(addr + 8);
236
237 p++;
238 }
239}
240
241struct leon_1insn_patch_entry {
242 unsigned int addr;
243 unsigned int insn;
244};
245
246enum sparc_cpu sparc_cpu_model;
247EXPORT_SYMBOL(sparc_cpu_model);
248
249static __init void leon_patch(void)
250{
251 struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
252 struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;
253
254
255 if (sparc_cpu_model == sparc_leon)
256 return;
257
258 while (start < end) {
259 unsigned long addr = start->addr;
260
261 *(unsigned int *)(addr) = start->insn;
262 flushi(addr);
263
264 start++;
265 }
266}
267
268struct tt_entry *sparc_ttable;
269
270
271
272
273void __init sparc32_start_kernel(struct linux_romvec *rp)
274{
275 prom_init(rp);
276
277
278 sparc_cpu_model = sun_unknown;
279 if (!strcmp(&cputypval[0], "sun4m"))
280 sparc_cpu_model = sun4m;
281 if (!strcmp(&cputypval[0], "sun4s"))
282 sparc_cpu_model = sun4m;
283 if (!strcmp(&cputypval[0], "sun4d"))
284 sparc_cpu_model = sun4d;
285 if (!strcmp(&cputypval[0], "sun4e"))
286 sparc_cpu_model = sun4e;
287 if (!strcmp(&cputypval[0], "sun4u"))
288 sparc_cpu_model = sun4u;
289 if (!strncmp(&cputypval[0], "leon" , 4))
290 sparc_cpu_model = sparc_leon;
291
292 leon_patch();
293 start_kernel();
294}
295
296void __init setup_arch(char **cmdline_p)
297{
298 int i;
299 unsigned long highest_paddr;
300
301 sparc_ttable = &trapbase;
302
303
304 *cmdline_p = prom_getbootargs();
305 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
306 parse_early_param();
307
308 boot_flags_init(*cmdline_p);
309
310 register_console(&prom_early_console);
311
312 switch(sparc_cpu_model) {
313 case sun4m:
314 pr_info("ARCH: SUN4M\n");
315 break;
316 case sun4d:
317 pr_info("ARCH: SUN4D\n");
318 break;
319 case sun4e:
320 pr_info("ARCH: SUN4E\n");
321 break;
322 case sun4u:
323 pr_info("ARCH: SUN4U\n");
324 break;
325 case sparc_leon:
326 pr_info("ARCH: LEON\n");
327 break;
328 default:
329 pr_info("ARCH: UNKNOWN!\n");
330 break;
331 }
332
333 idprom_init();
334 load_mmu();
335
336 phys_base = 0xffffffffUL;
337 highest_paddr = 0UL;
338 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
339 unsigned long top;
340
341 if (sp_banks[i].base_addr < phys_base)
342 phys_base = sp_banks[i].base_addr;
343 top = sp_banks[i].base_addr +
344 sp_banks[i].num_bytes;
345 if (highest_paddr < top)
346 highest_paddr = top;
347 }
348 pfn_base = phys_base >> PAGE_SHIFT;
349
350 if (!root_flags)
351 root_mountflags &= ~MS_RDONLY;
352 ROOT_DEV = old_decode_dev(root_dev);
353#ifdef CONFIG_BLK_DEV_RAM
354 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
355#endif
356
357 prom_setsync(prom_sync_me);
358
359 if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
360 ((*(short *)linux_dbvec) != -1)) {
361 printk("Booted under KADB. Syncing trap table.\n");
362 (*(linux_dbvec->teach_debugger))();
363 }
364
365
366 per_cpu_patch();
367
368 paging_init();
369
370 smp_setup_cpu_possible_map();
371}
372
373extern int stop_a_enabled;
374
375void sun_do_break(void)
376{
377 if (!stop_a_enabled)
378 return;
379
380 printk("\n");
381 flush_user_windows();
382
383 prom_cmdline();
384}
385EXPORT_SYMBOL(sun_do_break);
386
387int stop_a_enabled = 1;
388
389static int __init topology_init(void)
390{
391 int i, ncpus, err;
392
393
394
395
396
397 ncpus = 0;
398 while (!cpu_find_by_instance(ncpus, NULL, NULL))
399 ncpus++;
400 ncpus_probed = ncpus;
401
402 err = 0;
403 for_each_online_cpu(i) {
404 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
405 if (!p)
406 err = -ENOMEM;
407 else
408 register_cpu(p, i);
409 }
410
411 return err;
412}
413
414subsys_initcall(topology_init);
415