2 * Common prep/pmac/chrp boot and setup code.
5 #include <linux/config.h>
6 #include <linux/module.h>
7 #include <linux/string.h>
8 #include <linux/sched.h>
9 #include <linux/init.h>
10 #include <linux/reboot.h>
11 #include <linux/delay.h>
12 #include <linux/initrd.h>
13 #include <linux/ide.h>
14 #include <linux/tty.h>
15 #include <linux/bootmem.h>
16 #include <linux/seq_file.h>
17 #include <linux/root_dev.h>
18 #include <linux/cpu.h>
19 #include <linux/console.h>
21 #include <asm/residual.h>
24 #include <asm/processor.h>
25 #include <asm/pgtable.h>
26 #include <asm/bootinfo.h>
27 #include <asm/setup.h>
28 #include <asm/amigappc.h>
31 #include <asm/cputable.h>
32 #include <asm/bootx.h>
33 #include <asm/btext.h>
34 #include <asm/machdep.h>
35 #include <asm/uaccess.h>
36 #include <asm/system.h>
37 #include <asm/pmac_feature.h>
38 #include <asm/sections.h>
39 #include <asm/nvram.h>
43 #if defined CONFIG_KGDB
47 extern void platform_init(unsigned long r3, unsigned long r4,
48 unsigned long r5, unsigned long r6, unsigned long r7);
49 extern void bootx_init(unsigned long r4, unsigned long phys);
50 extern void identify_cpu(unsigned long offset, unsigned long cpu);
51 extern void do_cpu_ftr_fixups(unsigned long offset);
52 extern void reloc_got2(unsigned long offset);
54 extern void ppc6xx_idle(void);
55 extern void power4_idle(void);
57 extern boot_infos_t *boot_infos;
58 unsigned char aux_device_present;
59 struct ide_machdep_calls ppc_ide_md;
61 unsigned long sysmap_size;
63 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
64 size value reported by the boot loader. */
65 unsigned long boot_mem_size;
67 unsigned long ISA_DMA_THRESHOLD;
68 unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
70 #ifdef CONFIG_PPC_MULTIPLATFORM
73 extern void prep_init(unsigned long r3, unsigned long r4,
74 unsigned long r5, unsigned long r6, unsigned long r7);
75 extern void pmac_init(unsigned long r3, unsigned long r4,
76 unsigned long r5, unsigned long r6, unsigned long r7);
77 extern void chrp_init(unsigned long r3, unsigned long r4,
78 unsigned long r5, unsigned long r6, unsigned long r7);
79 #endif /* CONFIG_PPC_MULTIPLATFORM */
81 #ifdef CONFIG_MAGIC_SYSRQ
82 unsigned long SYSRQ_KEY = 0x54;
83 #endif /* CONFIG_MAGIC_SYSRQ */
85 #ifdef CONFIG_VGA_CONSOLE
86 unsigned long vgacon_remap_base;
89 struct machdep_calls ppc_md;
92 * These are used in binfmt_elf.c to put aux entries on the stack
93 * for each elf executable being started.
99 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
100 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
101 struct screen_info screen_info = {
102 0, 25, /* orig-x, orig-y */
104 0, /* orig-video-page */
105 0, /* orig-video-mode */
106 80, /* orig-video-cols */
107 0,0,0, /* ega_ax, ega_bx, ega_cx */
108 25, /* orig-video-lines */
109 1, /* orig-video-isVGA */
110 16 /* orig-video-points */
112 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
114 void machine_restart(char *cmd)
122 EXPORT_SYMBOL(machine_restart);
124 void machine_power_off(void)
132 EXPORT_SYMBOL(machine_power_off);
134 void machine_halt(void)
142 EXPORT_SYMBOL(machine_halt);
144 void (*pm_power_off)(void) = machine_power_off;
147 extern u32 cpu_temp(unsigned long cpu);
148 extern u32 cpu_temp_both(unsigned long cpu);
149 #endif /* CONFIG_TAU */
151 int show_cpuinfo(struct seq_file *m, void *v)
156 unsigned short maj, min;
160 /* Show summary information */
162 unsigned long bogosum = 0;
163 for (i = 0; i < NR_CPUS; ++i)
165 bogosum += cpu_data[i].loops_per_jiffy;
166 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
167 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
168 #endif /* CONFIG_SMP */
170 if (ppc_md.show_cpuinfo != NULL)
171 err = ppc_md.show_cpuinfo(m);
178 pvr = cpu_data[i].pvr;
179 lpj = cpu_data[i].loops_per_jiffy;
182 lpj = loops_per_jiffy;
185 seq_printf(m, "processor\t: %d\n", i);
186 seq_printf(m, "cpu\t\t: ");
188 if (cur_cpu_spec[i]->pvr_mask)
189 seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
191 seq_printf(m, "unknown (%08x)", pvr);
192 #ifdef CONFIG_ALTIVEC
193 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
194 seq_printf(m, ", altivec supported");
199 if (cur_cpu_spec[i]->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(i);
208 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
209 temp & 0xff, temp >> 16);
212 #endif /* CONFIG_TAU */
214 if (ppc_md.show_percpuinfo != NULL) {
215 err = ppc_md.show_percpuinfo(m, i);
220 switch (PVR_VER(pvr)) {
221 case 0x0020: /* 403 family */
222 maj = PVR_MAJ(pvr) + 1;
225 case 0x1008: /* 740P/750P ?? */
226 maj = ((pvr >> 8) & 0xFF) - 1;
230 maj = (pvr >> 8) & 0xFF;
235 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
236 maj, min, PVR_VER(pvr), PVR_REV(pvr));
238 seq_printf(m, "bogomips\t: %lu.%02lu\n",
239 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
248 static void *c_start(struct seq_file *m, loff_t *pos)
252 return i <= NR_CPUS? (void *) (i + 1): NULL;
255 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
258 return c_start(m, pos);
261 static void c_stop(struct seq_file *m, void *v)
265 struct seq_operations cpuinfo_op = {
269 .show = show_cpuinfo,
273 * We're called here very early in the boot. We determine the machine
274 * type and call the appropriate low-level setup functions.
275 * -- Cort <cort@fsmlabs.com>
277 * Note that the kernel may be running at an address which is different
278 * from the address that it was linked at, so we must use RELOC/PTRRELOC
279 * to access static data (including strings). -- paulus
283 early_init(int r3, int r4, int r5)
286 unsigned long offset = reloc_offset();
289 phys = offset + KERNELBASE;
291 /* First zero the BSS -- use memset, some arches don't have
293 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
296 * Identify the CPU type and fix up code sections
297 * that depend on which cpu we have.
299 identify_cpu(offset, 0);
300 do_cpu_ftr_fixups(offset);
302 #if defined(CONFIG_PPC_MULTIPLATFORM)
305 /* If we came here from BootX, clear the screen,
306 * set up some pointers and return. */
307 if ((r3 == 0x426f6f58) && (r5 == 0))
308 bootx_init(r4, phys);
311 * don't do anything on prep
312 * for now, don't use bootinfo because it breaks yaboot 0.5
313 * and assume that if we didn't find a magic number, we have OF
315 else if (*(unsigned long *)(0) != 0xdeadc0de)
316 phys = prom_init(r3, r4, (prom_entry)r5);
326 * Assume here that all clock rates are the same in a
327 * smp system. -- Cort
330 of_show_percpuinfo(struct seq_file *m, int i)
332 struct device_node *cpu_node;
335 cpu_node = find_type_devices("cpu");
338 for (s = 0; s < i && cpu_node->next; s++)
339 cpu_node = cpu_node->next;
340 fp = (int *) get_property(cpu_node, "clock-frequency", NULL);
342 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
347 intuit_machine_type(void)
350 struct device_node *root;
352 /* ask the OF info if we're a chrp or pmac */
353 root = find_path_device("/");
355 /* assume pmac unless proven to be chrp -- Cort */
356 _machine = _MACH_Pmac;
357 model = get_property(root, "device_type", NULL);
358 if (model && !strncmp("chrp", model, 4))
359 _machine = _MACH_chrp;
361 model = get_property(root, "model", NULL);
362 if (model && !strncmp(model, "IBM", 3))
363 _machine = _MACH_chrp;
369 #ifdef CONFIG_PPC_MULTIPLATFORM
371 * The PPC_MULTIPLATFORM version of platform_init...
374 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
375 unsigned long r6, unsigned long r7)
377 #ifdef CONFIG_BOOTX_TEXT
378 if (boot_text_mapped) {
384 parse_bootinfo(find_bootinfo());
386 /* if we didn't get any bootinfo telling us what we are... */
388 /* prep boot loader tells us if we're prep or not */
389 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
390 _machine = _MACH_prep;
393 /* not much more to do here, if prep */
394 if (_machine == _MACH_prep) {
395 prep_init(r3, r4, r5, r6, r7);
399 /* prom_init has already been called from __start */
403 /* If we aren't PReP, we can find out if we're Pmac
404 * or CHRP with this. */
406 intuit_machine_type();
408 /* finish_device_tree may need _machine defined. */
409 finish_device_tree();
412 * If we were booted via quik, r3 points to the physical
413 * address of the command-line parameters.
414 * If we were booted from an xcoff image (i.e. netbooted or
415 * booted from floppy), we get the command line from the
416 * bootargs property of the /chosen node.
417 * If an initial ramdisk is present, r3 and r4
418 * are used for initrd_start and initrd_size,
419 * otherwise they contain 0xdeadbeef.
422 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
423 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
425 } else if (boot_infos != 0) {
426 /* booted by BootX - check for ramdisk */
427 if (boot_infos->kernelParamsOffset != 0)
428 strlcpy(cmd_line, (char *) boot_infos
429 + boot_infos->kernelParamsOffset,
431 #ifdef CONFIG_BLK_DEV_INITRD
432 if (boot_infos->ramDisk) {
433 initrd_start = (unsigned long) boot_infos
434 + boot_infos->ramDisk;
435 initrd_end = initrd_start + boot_infos->ramDiskSize;
436 initrd_below_start_ok = 1;
440 struct device_node *chosen;
443 #ifdef CONFIG_BLK_DEV_INITRD
444 if (r3 && r4 && r4 != 0xdeadbeef) {
448 initrd_end = r3 + r4;
449 ROOT_DEV = Root_RAM0;
450 initrd_below_start_ok = 1;
453 chosen = find_devices("chosen");
454 if (chosen != NULL) {
455 p = get_property(chosen, "bootargs", NULL);
457 strlcpy(cmd_line, p, sizeof(cmd_line));
462 if (strstr(cmd_line, "adb_sync")) {
463 extern int __adb_probe_sync;
464 __adb_probe_sync = 1;
466 #endif /* CONFIG_ADB */
470 pmac_init(r3, r4, r5, r6, r7);
473 chrp_init(r3, r4, r5, r6, r7);
478 #ifdef CONFIG_SERIAL_CORE_CONSOLE
479 extern char *of_stdout_device;
481 static int __init set_preferred_console(void)
483 struct device_node *prom_stdout;
487 /* The user has requested a console so this is already set up. */
488 if (strstr(saved_command_line, "console="))
491 prom_stdout = find_path_device(of_stdout_device);
495 name = (char *)get_property(prom_stdout, "name", NULL);
499 if (strcmp(name, "serial") == 0) {
501 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
517 /* We dont recognise the serial port */
521 } else if (strcmp(name, "ch-a") == 0)
523 else if (strcmp(name, "ch-b") == 0)
527 return add_preferred_console("ttyS", offset, NULL);
529 console_initcall(set_preferred_console);
530 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
531 #endif /* CONFIG_PPC_MULTIPLATFORM */
533 struct bi_record *find_bootinfo(void)
535 struct bi_record *rec;
537 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
538 if ( rec->tag != BI_FIRST ) {
540 * This 0x10000 offset is a terrible hack but it will go away when
541 * we have the bootloader handle all the relocation and
544 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
545 if ( rec->tag != BI_FIRST )
551 void parse_bootinfo(struct bi_record *rec)
553 if (rec == NULL || rec->tag != BI_FIRST)
555 while (rec->tag != BI_LAST) {
556 ulong *data = rec->data;
559 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
562 sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
563 (data[0]+KERNELBASE));
564 sysmap_size = data[1];
566 #ifdef CONFIG_BLK_DEV_INITRD
568 initrd_start = data[0] + KERNELBASE;
569 initrd_end = data[0] + data[1] + KERNELBASE;
571 #endif /* CONFIG_BLK_DEV_INITRD */
572 #ifdef CONFIG_PPC_MULTIPLATFORM
578 boot_mem_size = data[0];
581 rec = (struct bi_record *)((ulong)rec + rec->size);
586 * Find out what kind of machine we're on and save any data we need
587 * from the early boot process (devtree is copied on pmac by prom_init()).
588 * This is called very early on the boot process, after a minimal
589 * MMU environment has been set up but before MMU_init is called.
592 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
593 unsigned long r6, unsigned long r7)
595 #ifdef CONFIG_CMDLINE
596 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
597 #endif /* CONFIG_CMDLINE */
600 ppc_md.power_save = ppc6xx_idle;
603 ppc_md.power_save = power4_idle;
606 platform_init(r3, r4, r5, r6, r7);
609 ppc_md.progress("id mach(): done", 0x200);
612 /* Checks "l2cr=xxxx" command-line option */
613 int __init ppc_setup_l2cr(char *str)
615 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_L2CR) {
616 unsigned long val = simple_strtoul(str, NULL, 0);
617 printk(KERN_INFO "l2cr set to %lx\n", val);
618 _set_L2CR(0); /* force invalidate by disable cache */
619 _set_L2CR(val); /* and enable it */
623 __setup("l2cr=", ppc_setup_l2cr);
625 #ifdef CONFIG_GENERIC_NVRAM
627 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
628 unsigned char nvram_read_byte(int addr)
630 if (ppc_md.nvram_read_val)
631 return ppc_md.nvram_read_val(addr);
634 EXPORT_SYMBOL(nvram_read_byte);
636 void nvram_write_byte(unsigned char val, int addr)
638 if (ppc_md.nvram_write_val)
639 ppc_md.nvram_write_val(addr, val);
641 EXPORT_SYMBOL(nvram_write_byte);
643 void nvram_sync(void)
645 if (ppc_md.nvram_sync)
648 EXPORT_SYMBOL(nvram_sync);
650 #endif /* CONFIG_NVRAM */
652 static struct cpu cpu_devices[NR_CPUS];
654 int __init ppc_init(void)
658 /* clear the progress line */
659 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
661 /* register CPU devices */
662 for (i = 0; i < NR_CPUS; i++)
664 register_cpu(&cpu_devices[i], i, NULL);
666 /* call platform init */
667 if (ppc_md.init != NULL) {
673 arch_initcall(ppc_init);
675 /* Warning, IO base is not yet inited */
676 void __init setup_arch(char **cmdline_p)
678 extern int panic_timeout;
680 extern void do_init_bootmem(void);
682 /* so udelay does something sensible, assume <= 1000 bogomips */
683 loops_per_jiffy = 500000000 / HZ;
685 #ifdef CONFIG_PPC_MULTIPLATFORM
686 /* This could be called "early setup arch", it must be done
687 * now because xmon need it
689 if (_machine == _MACH_Pmac)
690 pmac_feature_init(); /* New cool way */
695 if (strstr(cmd_line, "xmon"))
697 #endif /* CONFIG_XMON */
698 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
700 #if defined(CONFIG_KGDB)
701 if (ppc_md.kgdb_map_scc)
702 ppc_md.kgdb_map_scc();
704 if (strstr(cmd_line, "gdb")) {
706 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
707 printk("kgdb breakpoint activated\n");
713 * Set cache line size based on type of cpu as a default.
714 * Systems with OF can look in the properties on the cpu node(s)
715 * for a possibly more accurate value.
717 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_SPLIT_ID_CACHE) {
718 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
719 icache_bsize = cur_cpu_spec[0]->icache_bsize;
722 ucache_bsize = dcache_bsize = icache_bsize
723 = cur_cpu_spec[0]->dcache_bsize;
725 /* reboot on panic */
728 init_mm.start_code = PAGE_OFFSET;
729 init_mm.end_code = (unsigned long) _etext;
730 init_mm.end_data = (unsigned long) _edata;
731 init_mm.brk = (unsigned long) klimit;
733 /* Save unparsed command line copy for /proc/cmdline */
734 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
735 *cmdline_p = cmd_line;
737 /* set up the bootmem stuff with available memory */
739 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
741 #ifdef CONFIG_PPC_OCP
742 /* Initialize OCP device list */
744 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
748 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
752 /* this is for modules since _machine can be a define -- Cort */
753 ppc_md.ppc_machine = _machine;