2 * Common boot and setup code for both 32-bit and 64-bit.
3 * Extracted from arch/powerpc/kernel/setup_64.c.
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/string.h>
15 #include <linux/sched.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/reboot.h>
19 #include <linux/delay.h>
20 #include <linux/initrd.h>
21 #include <linux/ide.h>
22 #include <linux/seq_file.h>
23 #include <linux/ioport.h>
24 #include <linux/console.h>
25 #include <linux/utsname.h>
26 #include <linux/tty.h>
27 #include <linux/root_dev.h>
28 #include <linux/notifier.h>
29 #include <linux/cpu.h>
30 #include <linux/unistd.h>
31 #include <linux/serial.h>
32 #include <linux/serial_8250.h>
35 #include <asm/processor.h>
36 #include <asm/pgtable.h>
39 #include <asm/machdep.h>
41 #include <asm/cputable.h>
42 #include <asm/sections.h>
43 #include <asm/btext.h>
44 #include <asm/nvram.h>
45 #include <asm/setup.h>
46 #include <asm/system.h>
48 #include <asm/iommu.h>
49 #include <asm/serial.h>
50 #include <asm/cache.h>
61 #define DBG(fmt...) udbg_printf(fmt)
67 * This still seems to be needed... -- paulus
69 struct screen_info screen_info
= {
72 .orig_video_cols
= 80,
73 .orig_video_lines
= 25,
74 .orig_video_isVGA
= 1,
75 .orig_video_points
= 16
79 /* XXX should go elsewhere eventually */
80 int ppc_do_canonicalize_irqs
;
81 EXPORT_SYMBOL(ppc_do_canonicalize_irqs
);
84 /* also used by kexec */
85 void machine_shutdown(void)
87 if (ppc_md
.nvram_sync
)
91 void machine_restart(char *cmd
)
98 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
103 void machine_power_off(void)
110 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
114 /* Used by the G5 thermal driver */
115 EXPORT_SYMBOL_GPL(machine_power_off
);
117 void (*pm_power_off
)(void) = machine_power_off
;
118 EXPORT_SYMBOL_GPL(pm_power_off
);
120 void machine_halt(void)
127 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
134 extern u32
cpu_temp(unsigned long cpu
);
135 extern u32
cpu_temp_both(unsigned long cpu
);
136 #endif /* CONFIG_TAU */
139 DEFINE_PER_CPU(unsigned int, pvr
);
142 static int show_cpuinfo(struct seq_file
*m
, void *v
)
144 unsigned long cpu_id
= (unsigned long)v
- 1;
149 if (cpu_id
== NR_CPUS
) {
150 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
151 unsigned long bogosum
= 0;
153 for (i
= 0; i
< NR_CPUS
; ++i
)
155 bogosum
+= loops_per_jiffy
;
156 seq_printf(m
, "total bogomips\t: %lu.%02lu\n",
157 bogosum
/(500000/HZ
), bogosum
/(5000/HZ
) % 100);
158 #endif /* CONFIG_SMP && CONFIG_PPC32 */
159 seq_printf(m
, "timebase\t: %lu\n", ppc_tb_freq
);
161 if (ppc_md
.show_cpuinfo
!= NULL
)
162 ppc_md
.show_cpuinfo(m
);
167 /* We only show online cpus: disable preempt (overzealous, I
168 * knew) to prevent cpu going down. */
170 if (!cpu_online(cpu_id
)) {
176 pvr
= per_cpu(pvr
, cpu_id
);
178 pvr
= mfspr(SPRN_PVR
);
180 maj
= (pvr
>> 8) & 0xFF;
183 seq_printf(m
, "processor\t: %lu\n", cpu_id
);
184 seq_printf(m
, "cpu\t\t: ");
186 if (cur_cpu_spec
->pvr_mask
)
187 seq_printf(m
, "%s", cur_cpu_spec
->cpu_name
);
189 seq_printf(m
, "unknown (%08x)", pvr
);
191 #ifdef CONFIG_ALTIVEC
192 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
193 seq_printf(m
, ", altivec supported");
194 #endif /* CONFIG_ALTIVEC */
199 if (cur_cpu_spec
->cpu_features
& CPU_FTR_TAU
) {
200 #ifdef CONFIG_TAU_AVERAGE
201 /* more straightforward, but potentially misleading */
202 seq_printf(m
, "temperature \t: %u C (uncalibrated)\n",
205 /* show the actual temp sensor range */
207 temp
= cpu_temp_both(cpu_id
);
208 seq_printf(m
, "temperature \t: %u-%u C (uncalibrated)\n",
209 temp
& 0xff, temp
>> 16);
212 #endif /* CONFIG_TAU */
215 * Assume here that all clock rates are the same in a
216 * smp system. -- Cort
219 seq_printf(m
, "clock\t\t: %lu.%06luMHz\n",
220 ppc_proc_freq
/ 1000000, ppc_proc_freq
% 1000000);
222 if (ppc_md
.show_percpuinfo
!= NULL
)
223 ppc_md
.show_percpuinfo(m
, cpu_id
);
225 /* If we are a Freescale core do a simple check so
226 * we dont have to keep adding cases in the future */
227 if (PVR_VER(pvr
) & 0x8000) {
231 switch (PVR_VER(pvr
)) {
232 case 0x0020: /* 403 family */
233 maj
= PVR_MAJ(pvr
) + 1;
236 case 0x1008: /* 740P/750P ?? */
237 maj
= ((pvr
>> 8) & 0xFF) - 1;
241 maj
= (pvr
>> 8) & 0xFF;
247 seq_printf(m
, "revision\t: %hd.%hd (pvr %04x %04x)\n",
248 maj
, min
, PVR_VER(pvr
), PVR_REV(pvr
));
251 seq_printf(m
, "bogomips\t: %lu.%02lu\n",
252 loops_per_jiffy
/ (500000/HZ
),
253 (loops_per_jiffy
/ (5000/HZ
)) % 100);
264 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
266 unsigned long i
= *pos
;
268 return i
<= NR_CPUS
? (void *)(i
+ 1) : NULL
;
271 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
274 return c_start(m
, pos
);
277 static void c_stop(struct seq_file
*m
, void *v
)
281 struct seq_operations cpuinfo_op
= {
285 .show
= show_cpuinfo
,
288 #ifdef CONFIG_PPC_MULTIPLATFORM
289 static int __init
set_preferred_console(void)
291 struct device_node
*prom_stdout
= NULL
;
296 DBG(" -> set_preferred_console()\n");
298 /* The user has requested a console so this is already set up. */
299 if (strstr(saved_command_line
, "console=")) {
300 DBG(" console was specified !\n");
305 DBG(" of_chosen is NULL !\n");
308 /* We are getting a weird phandle from OF ... */
309 /* ... So use the full path instead */
310 name
= (char *)get_property(of_chosen
, "linux,stdout-path", NULL
);
312 DBG(" no linux,stdout-path !\n");
315 prom_stdout
= of_find_node_by_path(name
);
317 DBG(" can't find stdout package %s !\n", name
);
320 DBG("stdout is %s\n", prom_stdout
->full_name
);
322 name
= (char *)get_property(prom_stdout
, "name", NULL
);
324 DBG(" stdout package has no name !\n");
327 spd
= (u32
*)get_property(prom_stdout
, "current-speed", NULL
);
331 #ifdef CONFIG_SERIAL_8250_CONSOLE
332 else if (strcmp(name
, "serial") == 0) {
334 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", &i
);
350 /* We dont recognise the serial port */
355 #endif /* CONFIG_SERIAL_8250_CONSOLE */
356 #ifdef CONFIG_PPC_PSERIES
357 else if (strcmp(name
, "vty") == 0) {
358 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", NULL
);
359 char *compat
= (char *)get_property(prom_stdout
, "compatible", NULL
);
361 if (reg
&& compat
&& (strcmp(compat
, "hvterm-protocol") == 0)) {
362 /* Host Virtual Serial Interface */
373 of_node_put(prom_stdout
);
374 DBG("Found hvsi console at offset %d\n", offset
);
375 return add_preferred_console("hvsi", offset
, NULL
);
377 /* pSeries LPAR virtual console */
378 of_node_put(prom_stdout
);
379 DBG("Found hvc console\n");
380 return add_preferred_console("hvc", 0, NULL
);
383 #endif /* CONFIG_PPC_PSERIES */
384 #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
385 else if (strcmp(name
, "ch-a") == 0)
387 else if (strcmp(name
, "ch-b") == 0)
389 #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
392 of_node_put(prom_stdout
);
394 DBG("Found serial console at ttyS%d\n", offset
);
397 static char __initdata opt
[16];
398 sprintf(opt
, "%d", *spd
);
399 return add_preferred_console("ttyS", offset
, opt
);
401 return add_preferred_console("ttyS", offset
, NULL
);
404 DBG("No preferred console found !\n");
405 of_node_put(prom_stdout
);
408 console_initcall(set_preferred_console
);
409 #endif /* CONFIG_PPC_MULTIPLATFORM */
411 void __init
check_for_initrd(void)
413 #ifdef CONFIG_BLK_DEV_INITRD
416 DBG(" -> check_for_initrd()\n");
419 prop
= (unsigned long *)get_property(of_chosen
,
420 "linux,initrd-start", NULL
);
422 initrd_start
= (unsigned long)__va(*prop
);
423 prop
= (unsigned long *)get_property(of_chosen
,
424 "linux,initrd-end", NULL
);
426 initrd_end
= (unsigned long)__va(*prop
);
427 initrd_below_start_ok
= 1;
433 /* If we were passed an initrd, set the ROOT_DEV properly if the values
434 * look sensible. If not, clear initrd reference.
436 if (initrd_start
>= KERNELBASE
&& initrd_end
>= KERNELBASE
&&
437 initrd_end
> initrd_start
)
438 ROOT_DEV
= Root_RAM0
;
440 printk("Bogus initrd %08lx %08lx\n", initrd_start
, initrd_end
);
441 initrd_start
= initrd_end
= 0;
445 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start
, initrd_end
);
447 DBG(" <- check_for_initrd()\n");
448 #endif /* CONFIG_BLK_DEV_INITRD */
454 * setup_cpu_maps - initialize the following cpu maps:
459 * Having the possible map set up early allows us to restrict allocations
460 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
462 * We do not initialize the online map here; cpus set their own bits in
463 * cpu_online_map as they come up.
465 * This function is valid only for Open Firmware systems. finish_device_tree
466 * must be called before using this.
468 * While we're here, we may as well set the "physical" cpu ids in the paca.
470 void __init
smp_setup_cpu_maps(void)
472 struct device_node
*dn
= NULL
;
476 while ((dn
= of_find_node_by_type(dn
, "cpu")) && cpu
< NR_CPUS
) {
478 int j
, len
= sizeof(u32
), nthreads
= 1;
480 intserv
= (int *)get_property(dn
, "ibm,ppc-interrupt-server#s",
483 nthreads
= len
/ sizeof(int);
485 intserv
= (int *) get_property(dn
, "reg", NULL
);
487 intserv
= &cpu
; /* assume logical == phys */
490 for (j
= 0; j
< nthreads
&& cpu
< NR_CPUS
; j
++) {
491 cpu_set(cpu
, cpu_present_map
);
492 set_hard_smp_processor_id(cpu
, intserv
[j
]);
494 if (intserv
[j
] == boot_cpuid_phys
)
496 cpu_set(cpu
, cpu_possible_map
);
501 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
502 * boot cpu is logical 0.
504 if (boot_cpuid_phys
!= get_hard_smp_processor_id(0)) {
506 tmp
= get_hard_smp_processor_id(0);
507 set_hard_smp_processor_id(0, boot_cpuid_phys
);
508 set_hard_smp_processor_id(swap_cpuid
, tmp
);
513 * On pSeries LPAR, we need to know how many cpus
514 * could possibly be added to this partition.
516 if (systemcfg
->platform
== PLATFORM_PSERIES_LPAR
&&
517 (dn
= of_find_node_by_path("/rtas"))) {
518 int num_addr_cell
, num_size_cell
, maxcpus
;
521 num_addr_cell
= prom_n_addr_cells(dn
);
522 num_size_cell
= prom_n_size_cells(dn
);
524 ireg
= (unsigned int *)
525 get_property(dn
, "ibm,lrdr-capacity", NULL
);
530 maxcpus
= ireg
[num_addr_cell
+ num_size_cell
];
532 /* Double maxcpus for processors which have SMT capability */
533 if (cpu_has_feature(CPU_FTR_SMT
))
536 if (maxcpus
> NR_CPUS
) {
538 "Partition configured for %d cpus, "
539 "operating system maximum is %d.\n",
543 printk(KERN_INFO
"Partition configured for %d cpus.\n",
546 for (cpu
= 0; cpu
< maxcpus
; cpu
++)
547 cpu_set(cpu
, cpu_possible_map
);
553 * Do the sibling map; assume only two threads per processor.
556 cpu_set(cpu
, cpu_sibling_map
[cpu
]);
557 if (cpu_has_feature(CPU_FTR_SMT
))
558 cpu_set(cpu
^ 0x1, cpu_sibling_map
[cpu
]);
561 systemcfg
->processorCount
= num_present_cpus();
562 #endif /* CONFIG_PPC64 */
564 #endif /* CONFIG_SMP */
567 static int __init
early_xmon(char *p
)
569 /* ensure xmon is enabled */
571 if (strncmp(p
, "on", 2) == 0)
573 if (strncmp(p
, "off", 3) == 0)
575 if (strncmp(p
, "early", 5) != 0)
583 early_param("xmon", early_xmon
);