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/kernel.h>
11 #include <linux/reboot.h>
12 #include <linux/delay.h>
13 #include <linux/initrd.h>
14 #include <linux/ide.h>
15 #include <linux/tty.h>
16 #include <linux/bootmem.h>
17 #include <linux/seq_file.h>
18 #include <linux/root_dev.h>
19 #include <linux/cpu.h>
20 #include <linux/console.h>
22 #include <asm/residual.h>
25 #include <asm/processor.h>
26 #include <asm/pgtable.h>
27 #include <asm/bootinfo.h>
28 #include <asm/setup.h>
29 #include <asm/amigappc.h>
32 #include <asm/cputable.h>
33 #include <asm/bootx.h>
34 #include <asm/btext.h>
35 #include <asm/machdep.h>
36 #include <asm/uaccess.h>
37 #include <asm/system.h>
38 #include <asm/pmac_feature.h>
39 #include <asm/sections.h>
40 #include <asm/nvram.h>
44 #if defined(CONFIG_85xx) || defined(CONFIG_83xx)
45 #include <asm/ppc_sys.h>
48 #if defined CONFIG_KGDB
52 extern void platform_init(unsigned long r3, unsigned long r4,
53 unsigned long r5, unsigned long r6, unsigned long r7);
54 extern void bootx_init(unsigned long r4, unsigned long phys);
55 extern void identify_cpu(unsigned long offset, unsigned long cpu);
56 extern void do_cpu_ftr_fixups(unsigned long offset);
57 extern void reloc_got2(unsigned long offset);
59 extern void ppc6xx_idle(void);
60 extern void power4_idle(void);
62 extern boot_infos_t *boot_infos;
63 struct ide_machdep_calls ppc_ide_md;
65 unsigned long sysmap_size;
67 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
68 size value reported by the boot loader. */
69 unsigned long boot_mem_size;
71 unsigned long ISA_DMA_THRESHOLD;
72 unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
74 #ifdef CONFIG_PPC_MULTIPLATFORM
77 extern void prep_init(unsigned long r3, unsigned long r4,
78 unsigned long r5, unsigned long r6, unsigned long r7);
79 extern void pmac_init(unsigned long r3, unsigned long r4,
80 unsigned long r5, unsigned long r6, unsigned long r7);
81 extern void chrp_init(unsigned long r3, unsigned long r4,
82 unsigned long r5, unsigned long r6, unsigned long r7);
83 #endif /* CONFIG_PPC_MULTIPLATFORM */
85 #ifdef CONFIG_MAGIC_SYSRQ
86 unsigned long SYSRQ_KEY = 0x54;
87 #endif /* CONFIG_MAGIC_SYSRQ */
89 #ifdef CONFIG_VGA_CONSOLE
90 unsigned long vgacon_remap_base;
93 struct machdep_calls ppc_md;
96 * These are used in binfmt_elf.c to put aux entries on the stack
97 * for each elf executable being started.
103 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
104 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
105 struct screen_info screen_info = {
106 0, 25, /* orig-x, orig-y */
108 0, /* orig-video-page */
109 0, /* orig-video-mode */
110 80, /* orig-video-cols */
111 0,0,0, /* ega_ax, ega_bx, ega_cx */
112 25, /* orig-video-lines */
113 1, /* orig-video-isVGA */
114 16 /* orig-video-points */
116 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
118 void machine_restart(char *cmd)
126 EXPORT_SYMBOL(machine_restart);
128 void machine_power_off(void)
136 EXPORT_SYMBOL(machine_power_off);
138 void machine_halt(void)
146 EXPORT_SYMBOL(machine_halt);
148 void (*pm_power_off)(void) = machine_power_off;
151 extern u32 cpu_temp(unsigned long cpu);
152 extern u32 cpu_temp_both(unsigned long cpu);
153 #endif /* CONFIG_TAU */
155 int show_cpuinfo(struct seq_file *m, void *v)
160 unsigned short maj, min;
164 /* Show summary information */
166 unsigned long bogosum = 0;
167 for (i = 0; i < NR_CPUS; ++i)
169 bogosum += cpu_data[i].loops_per_jiffy;
170 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
171 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
172 #endif /* CONFIG_SMP */
174 if (ppc_md.show_cpuinfo != NULL)
175 err = ppc_md.show_cpuinfo(m);
182 pvr = cpu_data[i].pvr;
183 lpj = cpu_data[i].loops_per_jiffy;
185 pvr = mfspr(SPRN_PVR);
186 lpj = loops_per_jiffy;
189 seq_printf(m, "processor\t: %d\n", i);
190 seq_printf(m, "cpu\t\t: ");
192 if (cur_cpu_spec[i]->pvr_mask)
193 seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
195 seq_printf(m, "unknown (%08x)", pvr);
196 #ifdef CONFIG_ALTIVEC
197 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
198 seq_printf(m, ", altivec supported");
203 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_TAU) {
204 #ifdef CONFIG_TAU_AVERAGE
205 /* more straightforward, but potentially misleading */
206 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
209 /* show the actual temp sensor range */
211 temp = cpu_temp_both(i);
212 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
213 temp & 0xff, temp >> 16);
216 #endif /* CONFIG_TAU */
218 if (ppc_md.show_percpuinfo != NULL) {
219 err = ppc_md.show_percpuinfo(m, i);
224 /* If we are a Freescale core do a simple check so
225 * we dont have to keep adding cases in the future */
226 if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
230 switch (PVR_VER(pvr)) {
231 case 0x0020: /* 403 family */
232 maj = PVR_MAJ(pvr) + 1;
235 case 0x1008: /* 740P/750P ?? */
236 maj = ((pvr >> 8) & 0xFF) - 1;
240 maj = (pvr >> 8) & 0xFF;
246 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
247 maj, min, PVR_VER(pvr), PVR_REV(pvr));
249 seq_printf(m, "bogomips\t: %lu.%02lu\n",
250 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
252 #if defined(CONFIG_85xx) || defined(CONFIG_83xx)
253 if (cur_ppc_sys_spec->ppc_sys_name)
254 seq_printf(m, "chipset\t\t: %s\n",
255 cur_ppc_sys_spec->ppc_sys_name);
265 static void *c_start(struct seq_file *m, loff_t *pos)
269 return i <= NR_CPUS? (void *) (i + 1): NULL;
272 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
275 return c_start(m, pos);
278 static void c_stop(struct seq_file *m, void *v)
282 struct seq_operations cpuinfo_op = {
286 .show = show_cpuinfo,
290 * We're called here very early in the boot. We determine the machine
291 * type and call the appropriate low-level setup functions.
292 * -- Cort <cort@fsmlabs.com>
294 * Note that the kernel may be running at an address which is different
295 * from the address that it was linked at, so we must use RELOC/PTRRELOC
296 * to access static data (including strings). -- paulus
300 early_init(int r3, int r4, int r5)
303 unsigned long offset = reloc_offset();
306 phys = offset + KERNELBASE;
308 /* First zero the BSS -- use memset, some arches don't have
310 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
313 * Identify the CPU type and fix up code sections
314 * that depend on which cpu we have.
316 identify_cpu(offset, 0);
317 do_cpu_ftr_fixups(offset);
319 #if defined(CONFIG_PPC_MULTIPLATFORM)
322 /* If we came here from BootX, clear the screen,
323 * set up some pointers and return. */
324 if ((r3 == 0x426f6f58) && (r5 == 0))
325 bootx_init(r4, phys);
328 * don't do anything on prep
329 * for now, don't use bootinfo because it breaks yaboot 0.5
330 * and assume that if we didn't find a magic number, we have OF
332 else if (*(unsigned long *)(0) != 0xdeadc0de)
333 phys = prom_init(r3, r4, (prom_entry)r5);
343 * Assume here that all clock rates are the same in a
344 * smp system. -- Cort
347 of_show_percpuinfo(struct seq_file *m, int i)
349 struct device_node *cpu_node;
353 cpu_node = find_type_devices("cpu");
356 for (s = 0; s < i && cpu_node->next; s++)
357 cpu_node = cpu_node->next;
358 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
360 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
365 intuit_machine_type(void)
368 struct device_node *root;
370 /* ask the OF info if we're a chrp or pmac */
371 root = find_path_device("/");
373 /* assume pmac unless proven to be chrp -- Cort */
374 _machine = _MACH_Pmac;
375 model = get_property(root, "device_type", NULL);
376 if (model && !strncmp("chrp", model, 4))
377 _machine = _MACH_chrp;
379 model = get_property(root, "model", NULL);
380 if (model && !strncmp(model, "IBM", 3))
381 _machine = _MACH_chrp;
387 #ifdef CONFIG_PPC_MULTIPLATFORM
389 * The PPC_MULTIPLATFORM version of platform_init...
392 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
393 unsigned long r6, unsigned long r7)
395 #ifdef CONFIG_BOOTX_TEXT
396 if (boot_text_mapped) {
402 parse_bootinfo(find_bootinfo());
404 /* if we didn't get any bootinfo telling us what we are... */
406 /* prep boot loader tells us if we're prep or not */
407 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
408 _machine = _MACH_prep;
411 /* not much more to do here, if prep */
412 if (_machine == _MACH_prep) {
413 prep_init(r3, r4, r5, r6, r7);
417 /* prom_init has already been called from __start */
421 /* If we aren't PReP, we can find out if we're Pmac
422 * or CHRP with this. */
424 intuit_machine_type();
426 /* finish_device_tree may need _machine defined. */
427 finish_device_tree();
430 * If we were booted via quik, r3 points to the physical
431 * address of the command-line parameters.
432 * If we were booted from an xcoff image (i.e. netbooted or
433 * booted from floppy), we get the command line from the
434 * bootargs property of the /chosen node.
435 * If an initial ramdisk is present, r3 and r4
436 * are used for initrd_start and initrd_size,
437 * otherwise they contain 0xdeadbeef.
439 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
440 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
442 } else if (boot_infos != 0) {
443 /* booted by BootX - check for ramdisk */
444 if (boot_infos->kernelParamsOffset != 0)
445 strlcpy(cmd_line, (char *) boot_infos
446 + boot_infos->kernelParamsOffset,
448 #ifdef CONFIG_BLK_DEV_INITRD
449 if (boot_infos->ramDisk) {
450 initrd_start = (unsigned long) boot_infos
451 + boot_infos->ramDisk;
452 initrd_end = initrd_start + boot_infos->ramDiskSize;
453 initrd_below_start_ok = 1;
457 struct device_node *chosen;
460 #ifdef CONFIG_BLK_DEV_INITRD
461 if (r3 && r4 && r4 != 0xdeadbeef) {
465 initrd_end = r3 + r4;
466 ROOT_DEV = Root_RAM0;
467 initrd_below_start_ok = 1;
470 chosen = find_devices("chosen");
471 if (chosen != NULL) {
472 p = get_property(chosen, "bootargs", NULL);
474 strlcpy(cmd_line, p, sizeof(cmd_line));
479 if (strstr(cmd_line, "adb_sync")) {
480 extern int __adb_probe_sync;
481 __adb_probe_sync = 1;
483 #endif /* CONFIG_ADB */
487 pmac_init(r3, r4, r5, r6, r7);
490 chrp_init(r3, r4, r5, r6, r7);
495 #ifdef CONFIG_SERIAL_CORE_CONSOLE
496 extern char *of_stdout_device;
498 static int __init set_preferred_console(void)
500 struct device_node *prom_stdout;
504 if (of_stdout_device == NULL)
507 /* The user has requested a console so this is already set up. */
508 if (strstr(saved_command_line, "console="))
511 prom_stdout = find_path_device(of_stdout_device);
515 name = (char *)get_property(prom_stdout, "name", NULL);
519 if (strcmp(name, "serial") == 0) {
521 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
537 /* We dont recognise the serial port */
541 } else if (strcmp(name, "ch-a") == 0)
543 else if (strcmp(name, "ch-b") == 0)
547 return add_preferred_console("ttyS", offset, NULL);
549 console_initcall(set_preferred_console);
550 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
551 #endif /* CONFIG_PPC_MULTIPLATFORM */
553 struct bi_record *find_bootinfo(void)
555 struct bi_record *rec;
557 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
558 if ( rec->tag != BI_FIRST ) {
560 * This 0x10000 offset is a terrible hack but it will go away when
561 * we have the bootloader handle all the relocation and
564 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
565 if ( rec->tag != BI_FIRST )
571 void parse_bootinfo(struct bi_record *rec)
573 if (rec == NULL || rec->tag != BI_FIRST)
575 while (rec->tag != BI_LAST) {
576 ulong *data = rec->data;
579 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
582 sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
583 (data[0]+KERNELBASE));
584 sysmap_size = data[1];
586 #ifdef CONFIG_BLK_DEV_INITRD
588 initrd_start = data[0] + KERNELBASE;
589 initrd_end = data[0] + data[1] + KERNELBASE;
591 #endif /* CONFIG_BLK_DEV_INITRD */
592 #ifdef CONFIG_PPC_MULTIPLATFORM
598 boot_mem_size = data[0];
601 rec = (struct bi_record *)((ulong)rec + rec->size);
606 * Find out what kind of machine we're on and save any data we need
607 * from the early boot process (devtree is copied on pmac by prom_init()).
608 * This is called very early on the boot process, after a minimal
609 * MMU environment has been set up but before MMU_init is called.
612 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
613 unsigned long r6, unsigned long r7)
615 #ifdef CONFIG_CMDLINE
616 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
617 #endif /* CONFIG_CMDLINE */
620 ppc_md.power_save = ppc6xx_idle;
623 ppc_md.power_save = power4_idle;
626 platform_init(r3, r4, r5, r6, r7);
629 ppc_md.progress("id mach(): done", 0x200);
632 /* Checks "l2cr=xxxx" command-line option */
633 int __init ppc_setup_l2cr(char *str)
635 if (cpu_has_feature(CPU_FTR_L2CR)) {
636 unsigned long val = simple_strtoul(str, NULL, 0);
637 printk(KERN_INFO "l2cr set to %lx\n", val);
638 _set_L2CR(0); /* force invalidate by disable cache */
639 _set_L2CR(val); /* and enable it */
643 __setup("l2cr=", ppc_setup_l2cr);
645 #ifdef CONFIG_GENERIC_NVRAM
647 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
648 unsigned char nvram_read_byte(int addr)
650 if (ppc_md.nvram_read_val)
651 return ppc_md.nvram_read_val(addr);
654 EXPORT_SYMBOL(nvram_read_byte);
656 void nvram_write_byte(unsigned char val, int addr)
658 if (ppc_md.nvram_write_val)
659 ppc_md.nvram_write_val(addr, val);
661 EXPORT_SYMBOL(nvram_write_byte);
663 void nvram_sync(void)
665 if (ppc_md.nvram_sync)
668 EXPORT_SYMBOL(nvram_sync);
670 #endif /* CONFIG_NVRAM */
672 static struct cpu cpu_devices[NR_CPUS];
674 int __init ppc_init(void)
678 /* clear the progress line */
679 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
681 /* register CPU devices */
682 for (i = 0; i < NR_CPUS; i++)
684 register_cpu(&cpu_devices[i], i, NULL);
686 /* call platform init */
687 if (ppc_md.init != NULL) {
693 arch_initcall(ppc_init);
695 /* Warning, IO base is not yet inited */
696 void __init setup_arch(char **cmdline_p)
699 extern void do_init_bootmem(void);
701 /* so udelay does something sensible, assume <= 1000 bogomips */
702 loops_per_jiffy = 500000000 / HZ;
704 #ifdef CONFIG_PPC_MULTIPLATFORM
705 /* This could be called "early setup arch", it must be done
706 * now because xmon need it
708 if (_machine == _MACH_Pmac)
709 pmac_feature_init(); /* New cool way */
714 if (strstr(cmd_line, "xmon"))
716 #endif /* CONFIG_XMON */
717 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
719 #if defined(CONFIG_KGDB)
720 if (ppc_md.kgdb_map_scc)
721 ppc_md.kgdb_map_scc();
723 if (strstr(cmd_line, "gdb")) {
725 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
726 printk("kgdb breakpoint activated\n");
732 * Set cache line size based on type of cpu as a default.
733 * Systems with OF can look in the properties on the cpu node(s)
734 * for a possibly more accurate value.
736 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
737 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
738 icache_bsize = cur_cpu_spec[0]->icache_bsize;
741 ucache_bsize = dcache_bsize = icache_bsize
742 = cur_cpu_spec[0]->dcache_bsize;
744 /* reboot on panic */
747 init_mm.start_code = PAGE_OFFSET;
748 init_mm.end_code = (unsigned long) _etext;
749 init_mm.end_data = (unsigned long) _edata;
750 init_mm.brk = (unsigned long) klimit;
752 /* Save unparsed command line copy for /proc/cmdline */
753 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
754 *cmdline_p = cmd_line;
758 /* set up the bootmem stuff with available memory */
760 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
762 #ifdef CONFIG_PPC_OCP
763 /* Initialize OCP device list */
765 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
768 #ifdef CONFIG_DUMMY_CONSOLE
769 conswitchp = &dummy_con;
773 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
777 /* this is for modules since _machine can be a define -- Cort */
778 ppc_md.ppc_machine = _machine;