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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/sparc/kernel/setup.c
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
7 */
8
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, /* orig-x, orig-y */
56 0, /* unused */
57 0, /* orig-video-page */
58 0, /* orig-video-mode */
59 128, /* orig-video-cols */
60 0,0,0, /* ega_ax, ega_bx, ega_cx */
61 54, /* orig-video-lines */
62 0, /* orig-video-isVGA */
63 16 /* orig-video-points */
64};
65
66/* Typing sync at the prom prompt calls the function pointed to by
67 * romvec->pv_synchook which I set to the following function.
68 * This should sync all filesystems and return, for now it just
69 * prints out pretty messages and returns.
70 */
71
72/* Pretty sick eh? */
73static void prom_sync_me(void)
74{
75 unsigned long prom_tbr, flags;
76
77 /* XXX Badly broken. FIX! - Anton */
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/* Exported for mm/init.c:paging_init. */
105unsigned long cmdline_memory_size __initdata = 0;
106
107/* which CPU booted us (0xff = not set) */
108unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
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 * Process kernel command line switches that are specific to the
125 * SPARC or that require special low-level processing.
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 /* Move to the start of the next "argument". */
152 while (*commands == ' ')
153 commands++;
154
155 /* Process any command switches, otherwise skip it. */
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 * "mem=XXX[kKmM] overrides the PROM-reported
167 * memory size.
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 /* Nothing to do, this is what the unpatched code
208 * targets.
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 /* Default instruction is leon - no patching */
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/* Called from head_32.S - before we have setup anything
271 * in the kernel. Be very careful with what you do here.
272 */
273void __init sparc32_start_kernel(struct linux_romvec *rp)
274{
275 prom_init(rp);
276
277 /* Set sparc_cpu_model */
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; /* CP-1200 with PROM 2.30 -E */
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 /* Initialize PROM console and command line. */
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 /* Run-time patch instructions to match the cpu model */
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 /* Count the number of physically present processors in
394 * the machine, even on uniprocessor, so that /proc/cpuinfo
395 * output is consistent with 2.4.x
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);
1/*
2 * linux/arch/sparc/kernel/setup.c
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
6 */
7
8#include <linux/errno.h>
9#include <linux/sched.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/stddef.h>
13#include <linux/unistd.h>
14#include <linux/ptrace.h>
15#include <linux/slab.h>
16#include <linux/initrd.h>
17#include <asm/smp.h>
18#include <linux/user.h>
19#include <linux/screen_info.h>
20#include <linux/delay.h>
21#include <linux/fs.h>
22#include <linux/seq_file.h>
23#include <linux/syscalls.h>
24#include <linux/kdev_t.h>
25#include <linux/major.h>
26#include <linux/string.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/console.h>
30#include <linux/spinlock.h>
31#include <linux/root_dev.h>
32#include <linux/cpu.h>
33#include <linux/kdebug.h>
34
35#include <asm/system.h>
36#include <asm/io.h>
37#include <asm/processor.h>
38#include <asm/oplib.h>
39#include <asm/page.h>
40#include <asm/pgtable.h>
41#include <asm/traps.h>
42#include <asm/vaddrs.h>
43#include <asm/mbus.h>
44#include <asm/idprom.h>
45#include <asm/machines.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48
49#include "kernel.h"
50
51struct screen_info screen_info = {
52 0, 0, /* orig-x, orig-y */
53 0, /* unused */
54 0, /* orig-video-page */
55 0, /* orig-video-mode */
56 128, /* orig-video-cols */
57 0,0,0, /* ega_ax, ega_bx, ega_cx */
58 54, /* orig-video-lines */
59 0, /* orig-video-isVGA */
60 16 /* orig-video-points */
61};
62
63/* Typing sync at the prom prompt calls the function pointed to by
64 * romvec->pv_synchook which I set to the following function.
65 * This should sync all filesystems and return, for now it just
66 * prints out pretty messages and returns.
67 */
68
69extern unsigned long trapbase;
70
71/* Pretty sick eh? */
72static void prom_sync_me(void)
73{
74 unsigned long prom_tbr, flags;
75
76 /* XXX Badly broken. FIX! - Anton */
77 local_irq_save(flags);
78 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
79 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
80 "nop\n\t"
81 "nop\n\t"
82 "nop\n\t" : : "r" (&trapbase));
83
84 prom_printf("PROM SYNC COMMAND...\n");
85 show_free_areas(0);
86 if(current->pid != 0) {
87 local_irq_enable();
88 sys_sync();
89 local_irq_disable();
90 }
91 prom_printf("Returning to prom\n");
92
93 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
94 "nop\n\t"
95 "nop\n\t"
96 "nop\n\t" : : "r" (prom_tbr));
97 local_irq_restore(flags);
98}
99
100static unsigned int boot_flags __initdata = 0;
101#define BOOTME_DEBUG 0x1
102
103/* Exported for mm/init.c:paging_init. */
104unsigned long cmdline_memory_size __initdata = 0;
105
106/* which CPU booted us (0xff = not set) */
107unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
108unsigned char boot_cpu_id4; /* boot_cpu_id << 2 */
109
110static void
111prom_console_write(struct console *con, const char *s, unsigned 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 * Process kernel command line switches that are specific to the
125 * SPARC or that require special low-level processing.
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 /* Move to the start of the next "argument". */
152 while (*commands && *commands == ' ')
153 commands++;
154
155 /* Process any command switches, otherwise skip it. */
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 * "mem=XXX[kKmM] overrides the PROM-reported
167 * memory size.
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
184/* This routine will in the future do all the nasty prom stuff
185 * to probe for the mmu type and its parameters, etc. This will
186 * also be where SMP things happen.
187 */
188
189extern void sun4c_probe_vac(void);
190
191extern unsigned short root_flags;
192extern unsigned short root_dev;
193extern unsigned short ram_flags;
194#define RAMDISK_IMAGE_START_MASK 0x07FF
195#define RAMDISK_PROMPT_FLAG 0x8000
196#define RAMDISK_LOAD_FLAG 0x4000
197
198extern int root_mountflags;
199
200char reboot_command[COMMAND_LINE_SIZE];
201
202enum sparc_cpu sparc_cpu_model;
203EXPORT_SYMBOL(sparc_cpu_model);
204
205struct tt_entry *sparc_ttable;
206
207struct pt_regs fake_swapper_regs;
208
209void __init setup_arch(char **cmdline_p)
210{
211 int i;
212 unsigned long highest_paddr;
213
214 sparc_ttable = (struct tt_entry *) &trapbase;
215
216 /* Initialize PROM console and command line. */
217 *cmdline_p = prom_getbootargs();
218 strcpy(boot_command_line, *cmdline_p);
219 parse_early_param();
220
221 boot_flags_init(*cmdline_p);
222
223 register_console(&prom_early_console);
224
225 /* Set sparc_cpu_model */
226 sparc_cpu_model = sun_unknown;
227 if (!strcmp(&cputypval[0], "sun4 "))
228 sparc_cpu_model = sun4;
229 if (!strcmp(&cputypval[0], "sun4c"))
230 sparc_cpu_model = sun4c;
231 if (!strcmp(&cputypval[0], "sun4m"))
232 sparc_cpu_model = sun4m;
233 if (!strcmp(&cputypval[0], "sun4s"))
234 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
235 if (!strcmp(&cputypval[0], "sun4d"))
236 sparc_cpu_model = sun4d;
237 if (!strcmp(&cputypval[0], "sun4e"))
238 sparc_cpu_model = sun4e;
239 if (!strcmp(&cputypval[0], "sun4u"))
240 sparc_cpu_model = sun4u;
241 if (!strncmp(&cputypval[0], "leon" , 4))
242 sparc_cpu_model = sparc_leon;
243
244 printk("ARCH: ");
245 switch(sparc_cpu_model) {
246 case sun4:
247 printk("SUN4\n");
248 break;
249 case sun4c:
250 printk("SUN4C\n");
251 break;
252 case sun4m:
253 printk("SUN4M\n");
254 break;
255 case sun4d:
256 printk("SUN4D\n");
257 break;
258 case sun4e:
259 printk("SUN4E\n");
260 break;
261 case sun4u:
262 printk("SUN4U\n");
263 break;
264 case sparc_leon:
265 printk("LEON\n");
266 break;
267 default:
268 printk("UNKNOWN!\n");
269 break;
270 }
271
272#ifdef CONFIG_DUMMY_CONSOLE
273 conswitchp = &dummy_con;
274#endif
275
276 idprom_init();
277 if (ARCH_SUN4C)
278 sun4c_probe_vac();
279 load_mmu();
280
281 phys_base = 0xffffffffUL;
282 highest_paddr = 0UL;
283 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
284 unsigned long top;
285
286 if (sp_banks[i].base_addr < phys_base)
287 phys_base = sp_banks[i].base_addr;
288 top = sp_banks[i].base_addr +
289 sp_banks[i].num_bytes;
290 if (highest_paddr < top)
291 highest_paddr = top;
292 }
293 pfn_base = phys_base >> PAGE_SHIFT;
294
295 if (!root_flags)
296 root_mountflags &= ~MS_RDONLY;
297 ROOT_DEV = old_decode_dev(root_dev);
298#ifdef CONFIG_BLK_DEV_RAM
299 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
300 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
301 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
302#endif
303
304 prom_setsync(prom_sync_me);
305
306 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
307 ((*(short *)linux_dbvec) != -1)) {
308 printk("Booted under KADB. Syncing trap table.\n");
309 (*(linux_dbvec->teach_debugger))();
310 }
311
312 init_mm.context = (unsigned long) NO_CONTEXT;
313 init_task.thread.kregs = &fake_swapper_regs;
314
315 paging_init();
316
317 smp_setup_cpu_possible_map();
318}
319
320extern int stop_a_enabled;
321
322void sun_do_break(void)
323{
324 if (!stop_a_enabled)
325 return;
326
327 printk("\n");
328 flush_user_windows();
329
330 prom_cmdline();
331}
332EXPORT_SYMBOL(sun_do_break);
333
334int stop_a_enabled = 1;
335
336static int __init topology_init(void)
337{
338 int i, ncpus, err;
339
340 /* Count the number of physically present processors in
341 * the machine, even on uniprocessor, so that /proc/cpuinfo
342 * output is consistent with 2.4.x
343 */
344 ncpus = 0;
345 while (!cpu_find_by_instance(ncpus, NULL, NULL))
346 ncpus++;
347 ncpus_probed = ncpus;
348
349 err = 0;
350 for_each_online_cpu(i) {
351 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
352 if (!p)
353 err = -ENOMEM;
354 else
355 register_cpu(p, i);
356 }
357
358 return err;
359}
360
361subsys_initcall(topology_init);