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>
20 #include <asm/residual.h>
23 #include <asm/processor.h>
24 #include <asm/pgtable.h>
25 #include <asm/bootinfo.h>
26 #include <asm/setup.h>
27 #include <asm/amigappc.h>
30 #include <asm/cputable.h>
31 #include <asm/bootx.h>
32 #include <asm/btext.h>
33 #include <asm/machdep.h>
34 #include <asm/uaccess.h>
35 #include <asm/system.h>
36 #include <asm/pmac_feature.h>
37 #include <asm/sections.h>
40 #if defined CONFIG_KGDB
44 extern void platform_init(unsigned long r3, unsigned long r4,
45 unsigned long r5, unsigned long r6, unsigned long r7);
46 extern void bootx_init(unsigned long r4, unsigned long phys);
47 extern void identify_cpu(unsigned long offset, unsigned long cpu);
48 extern void do_cpu_ftr_fixups(unsigned long offset);
49 extern void reloc_got2(unsigned long offset);
53 extern void kgdb_map_scc(void);
56 extern void ppc6xx_idle(void);
58 extern boot_infos_t *boot_infos;
59 char saved_command_line[256];
60 unsigned char aux_device_present;
61 struct ide_machdep_calls ppc_ide_md;
63 unsigned long sysmap_size;
65 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
66 size value reported by the boot loader. */
67 unsigned long boot_mem_size;
69 unsigned long ISA_DMA_THRESHOLD;
70 unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
72 #ifdef CONFIG_PPC_MULTIPLATFORM
75 extern void prep_init(unsigned long r3, unsigned long r4,
76 unsigned long r5, unsigned long r6, unsigned long r7);
77 extern void pmac_init(unsigned long r3, unsigned long r4,
78 unsigned long r5, unsigned long r6, unsigned long r7);
79 extern void chrp_init(unsigned long r3, unsigned long r4,
80 unsigned long r5, unsigned long r6, unsigned long r7);
81 #endif /* CONFIG_PPC_MULTIPLATFORM */
83 #ifdef CONFIG_MAGIC_SYSRQ
84 unsigned long SYSRQ_KEY = 0x54;
85 #endif /* CONFIG_MAGIC_SYSRQ */
87 #ifdef CONFIG_VGA_CONSOLE
88 unsigned long vgacon_remap_base;
91 struct machdep_calls ppc_md;
94 * These are used in binfmt_elf.c to put aux entries on the stack
95 * for each elf executable being started.
101 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
102 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
103 struct screen_info screen_info = {
104 0, 25, /* orig-x, orig-y */
106 0, /* orig-video-page */
107 0, /* orig-video-mode */
108 80, /* orig-video-cols */
109 0,0,0, /* ega_ax, ega_bx, ega_cx */
110 25, /* orig-video-lines */
111 1, /* orig-video-isVGA */
112 16 /* orig-video-points */
114 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
116 void machine_restart(char *cmd)
121 void machine_power_off(void)
126 void machine_halt(void)
131 void (*pm_power_off)(void) = machine_power_off;
134 extern u32 cpu_temp(unsigned long cpu);
135 extern u32 cpu_temp_both(unsigned long cpu);
136 #endif /* CONFIG_TAU */
138 int show_cpuinfo(struct seq_file *m, void *v)
143 unsigned short maj, min;
147 /* Show summary information */
149 unsigned long bogosum = 0;
150 for (i = 0; i < NR_CPUS; ++i)
152 bogosum += cpu_data[i].loops_per_jiffy;
153 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
154 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
155 #endif /* CONFIG_SMP */
157 if (ppc_md.show_cpuinfo != NULL)
158 err = ppc_md.show_cpuinfo(m);
163 if (!(cpu_online_map & (1 << i)))
165 pvr = cpu_data[i].pvr;
166 lpj = cpu_data[i].loops_per_jiffy;
167 seq_printf(m, "processor\t: %d\n", i);
170 lpj = loops_per_jiffy;
173 seq_printf(m, "cpu\t\t: ");
175 if (cur_cpu_spec[i]->pvr_mask)
176 seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
178 seq_printf(m, "unknown (%08x)", pvr);
179 #ifdef CONFIG_ALTIVEC
180 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
181 seq_printf(m, ", altivec supported");
186 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_TAU) {
187 #ifdef CONFIG_TAU_AVERAGE
188 /* more straightforward, but potentially misleading */
189 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
192 /* show the actual temp sensor range */
194 temp = cpu_temp_both(i);
195 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
196 temp & 0xff, temp >> 16);
199 #endif /* CONFIG_TAU */
201 if (ppc_md.show_percpuinfo != NULL) {
202 err = ppc_md.show_percpuinfo(m, i);
207 switch (PVR_VER(pvr)) {
208 case 0x0020: /* 403 family */
209 maj = PVR_MAJ(pvr) + 1;
212 case 0x1008: /* 740P/750P ?? */
213 maj = ((pvr >> 8) & 0xFF) - 1;
217 maj = (pvr >> 8) & 0xFF;
222 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
223 maj, min, PVR_VER(pvr), PVR_REV(pvr));
225 seq_printf(m, "bogomips\t: %lu.%02lu\n",
226 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
235 static void *c_start(struct seq_file *m, loff_t *pos)
239 return i <= NR_CPUS? (void *) (i + 1): NULL;
242 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
245 return c_start(m, pos);
248 static void c_stop(struct seq_file *m, void *v)
252 struct seq_operations cpuinfo_op = {
256 .show = show_cpuinfo,
260 * We're called here very early in the boot. We determine the machine
261 * type and call the appropriate low-level setup functions.
262 * -- Cort <cort@fsmlabs.com>
264 * Note that the kernel may be running at an address which is different
265 * from the address that it was linked at, so we must use RELOC/PTRRELOC
266 * to access static data (including strings). -- paulus
270 early_init(int r3, int r4, int r5)
273 unsigned long offset = reloc_offset();
276 phys = offset + KERNELBASE;
278 /* First zero the BSS -- use memset, some arches don't have
280 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
283 * Identify the CPU type and fix up code sections
284 * that depend on which cpu we have.
286 identify_cpu(offset, 0);
287 do_cpu_ftr_fixups(offset);
289 #if defined(CONFIG_PPC_MULTIPLATFORM)
292 /* If we came here from BootX, clear the screen,
293 * set up some pointers and return. */
294 if ((r3 == 0x426f6f58) && (r5 == 0))
295 bootx_init(r4, phys);
298 * don't do anything on prep
299 * for now, don't use bootinfo because it breaks yaboot 0.5
300 * and assume that if we didn't find a magic number, we have OF
302 else if (*(unsigned long *)(0) != 0xdeadc0de)
303 phys = prom_init(r3, r4, (prom_entry)r5);
313 * Assume here that all clock rates are the same in a
314 * smp system. -- Cort
317 of_show_percpuinfo(struct seq_file *m, int i)
319 struct device_node *cpu_node;
322 cpu_node = find_type_devices("cpu");
325 for (s = 0; s < i && cpu_node->next; s++)
326 cpu_node = cpu_node->next;
327 fp = (int *) get_property(cpu_node, "clock-frequency", NULL);
329 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
334 intuit_machine_type(void)
337 struct device_node *root;
339 /* ask the OF info if we're a chrp or pmac */
340 root = find_path_device("/");
342 /* assume pmac unless proven to be chrp -- Cort */
343 _machine = _MACH_Pmac;
344 model = get_property(root, "device_type", NULL);
345 if (model && !strncmp("chrp", model, 4))
346 _machine = _MACH_chrp;
348 model = get_property(root, "model", NULL);
349 if (model && !strncmp(model, "IBM", 3))
350 _machine = _MACH_chrp;
356 #ifdef CONFIG_PPC_MULTIPLATFORM
358 * The PPC_MULTIPLATFORM version of platform_init...
361 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
362 unsigned long r6, unsigned long r7)
364 #ifdef CONFIG_BOOTX_TEXT
365 if (boot_text_mapped) {
371 parse_bootinfo(find_bootinfo());
373 /* if we didn't get any bootinfo telling us what we are... */
375 /* prep boot loader tells us if we're prep or not */
376 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
377 _machine = _MACH_prep;
380 /* not much more to do here, if prep */
381 if (_machine == _MACH_prep) {
382 prep_init(r3, r4, r5, r6, r7);
386 /* prom_init has already been called from __start */
390 /* If we aren't PReP, we can find out if we're Pmac
391 * or CHRP with this. */
393 intuit_machine_type();
395 /* finish_device_tree may need _machine defined. */
396 finish_device_tree();
399 * If we were booted via quik, r3 points to the physical
400 * address of the command-line parameters.
401 * If we were booted from an xcoff image (i.e. netbooted or
402 * booted from floppy), we get the command line from the
403 * bootargs property of the /chosen node.
404 * If an initial ramdisk is present, r3 and r4
405 * are used for initrd_start and initrd_size,
406 * otherwise they contain 0xdeadbeef.
409 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
410 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
412 } else if (boot_infos != 0) {
413 /* booted by BootX - check for ramdisk */
414 if (boot_infos->kernelParamsOffset != 0)
415 strlcpy(cmd_line, (char *) boot_infos
416 + boot_infos->kernelParamsOffset,
418 #ifdef CONFIG_BLK_DEV_INITRD
419 if (boot_infos->ramDisk) {
420 initrd_start = (unsigned long) boot_infos
421 + boot_infos->ramDisk;
422 initrd_end = initrd_start + boot_infos->ramDiskSize;
423 initrd_below_start_ok = 1;
427 struct device_node *chosen;
430 #ifdef CONFIG_BLK_DEV_INITRD
431 if (r3 && r4 && r4 != 0xdeadbeef) {
435 initrd_end = r3 + r4;
436 ROOT_DEV = Root_RAM0;
437 initrd_below_start_ok = 1;
440 chosen = find_devices("chosen");
441 if (chosen != NULL) {
442 p = get_property(chosen, "bootargs", NULL);
444 strlcpy(cmd_line, p, sizeof(cmd_line));
449 if (strstr(cmd_line, "adb_sync")) {
450 extern int __adb_probe_sync;
451 __adb_probe_sync = 1;
453 #endif /* CONFIG_ADB */
457 pmac_init(r3, r4, r5, r6, r7);
460 chrp_init(r3, r4, r5, r6, r7);
464 #endif /* CONFIG_PPC_MULTIPLATFORM */
466 struct bi_record *find_bootinfo(void)
468 struct bi_record *rec;
470 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
471 if ( rec->tag != BI_FIRST ) {
473 * This 0x10000 offset is a terrible hack but it will go away when
474 * we have the bootloader handle all the relocation and
477 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
478 if ( rec->tag != BI_FIRST )
484 void parse_bootinfo(struct bi_record *rec)
486 if (rec == NULL || rec->tag != BI_FIRST)
488 while (rec->tag != BI_LAST) {
489 ulong *data = rec->data;
492 memcpy(cmd_line, (void *)data, rec->size);
495 sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
496 (data[0]+KERNELBASE));
497 sysmap_size = data[1];
499 #ifdef CONFIG_BLK_DEV_INITRD
501 initrd_start = data[0] + KERNELBASE;
502 initrd_end = data[0] + data[1] + KERNELBASE;
504 #endif /* CONFIG_BLK_DEV_INITRD */
505 #ifdef CONFIG_PPC_MULTIPLATFORM
511 boot_mem_size = data[0];
514 rec = (struct bi_record *)((ulong)rec + rec->size);
519 * Find out what kind of machine we're on and save any data we need
520 * from the early boot process (devtree is copied on pmac by prom_init()).
521 * This is called very early on the boot process, after a minimal
522 * MMU environment has been set up but before MMU_init is called.
525 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
526 unsigned long r6, unsigned long r7)
528 #ifdef CONFIG_CMDLINE
529 strcpy(cmd_line, CONFIG_CMDLINE);
530 #endif /* CONFIG_CMDLINE */
532 #if defined(CONFIG_6xx)
533 ppc_md.power_save = ppc6xx_idle;
536 platform_init(r3, r4, r5, r6, r7);
539 ppc_md.progress("id mach(): done", 0x200);
542 /* Checks "l2cr=xxxx" command-line option */
543 int __init ppc_setup_l2cr(char *str)
545 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_L2CR) {
546 unsigned long val = simple_strtoul(str, NULL, 0);
547 printk(KERN_INFO "l2cr set to %lx\n", val);
548 _set_L2CR(0); /* force invalidate by disable cache */
549 _set_L2CR(val); /* and enable it */
553 __setup("l2cr=", ppc_setup_l2cr);
556 /* Generic nvram hooks we now look into ppc_md.nvram_read_val
558 * //XX Those 2 could be moved to headers
561 nvram_read_byte(int addr)
563 if (ppc_md.nvram_read_val)
564 return ppc_md.nvram_read_val(addr);
569 nvram_write_byte(unsigned char val, int addr)
571 if (ppc_md.nvram_write_val)
572 ppc_md.nvram_write_val(val, addr);
574 #endif /* CONFIG_NVRAM */
576 static struct cpu cpu_devices[NR_CPUS];
578 int __init ppc_init(void)
582 /* clear the progress line */
583 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
585 /* register CPU devices */
586 for (i = 0; i < NR_CPUS; i++)
588 register_cpu(&cpu_devices[i], i, NULL);
590 /* call platform init */
591 if (ppc_md.init != NULL) {
597 arch_initcall(ppc_init);
599 /* Warning, IO base is not yet inited */
600 void __init setup_arch(char **cmdline_p)
602 extern int panic_timeout;
604 extern void do_init_bootmem(void);
606 /* so udelay does something sensible, assume <= 1000 bogomips */
607 loops_per_jiffy = 500000000 / HZ;
609 #ifdef CONFIG_PPC_MULTIPLATFORM
610 /* This could be called "early setup arch", it must be done
611 * now because xmon need it
613 if (_machine == _MACH_Pmac)
614 pmac_feature_init(); /* New cool way */
619 if (strstr(cmd_line, "xmon"))
621 #endif /* CONFIG_XMON */
622 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
624 #if defined(CONFIG_KGDB)
627 if (strstr(cmd_line, "nokgdb"))
628 printk("kgdb default breakpoint deactivated on command line\n");
631 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
632 printk("kgdb default breakpoint activated\n");
638 * Set cache line size based on type of cpu as a default.
639 * Systems with OF can look in the properties on the cpu node(s)
640 * for a possibly more accurate value.
642 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_SPLIT_ID_CACHE) {
643 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
644 icache_bsize = cur_cpu_spec[0]->icache_bsize;
647 ucache_bsize = dcache_bsize = icache_bsize
648 = cur_cpu_spec[0]->dcache_bsize;
650 /* reboot on panic */
653 init_mm.start_code = PAGE_OFFSET;
654 init_mm.end_code = (unsigned long) _etext;
655 init_mm.end_data = (unsigned long) _edata;
656 init_mm.brk = (unsigned long) klimit;
658 /* Save unparsed command line copy for /proc/cmdline */
659 strcpy(saved_command_line, cmd_line);
660 *cmdline_p = cmd_line;
662 /* set up the bootmem stuff with available memory */
664 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
667 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
670 sort_exception_table();
672 /* this is for modules since _machine can be a define -- Cort */
673 ppc_md.ppc_machine = _machine;