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 #define USES_PPC_SYS (defined(CONFIG_85xx) || defined(CONFIG_83xx) || \
45 defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \
46 defined(CONFIG_PPC_MPC52xx))
49 #include <asm/ppc_sys.h>
52 #if defined CONFIG_KGDB
56 extern void platform_init(unsigned long r3, unsigned long r4,
57 unsigned long r5, unsigned long r6, unsigned long r7);
58 extern void bootx_init(unsigned long r4, unsigned long phys);
59 extern void identify_cpu(unsigned long offset, unsigned long cpu);
60 extern void do_cpu_ftr_fixups(unsigned long offset);
61 extern void reloc_got2(unsigned long offset);
63 extern void ppc6xx_idle(void);
64 extern void power4_idle(void);
66 extern boot_infos_t *boot_infos;
67 struct ide_machdep_calls ppc_ide_md;
69 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
70 size value reported by the boot loader. */
71 unsigned long boot_mem_size;
73 unsigned long ISA_DMA_THRESHOLD;
74 unsigned int DMA_MODE_READ;
75 unsigned int DMA_MODE_WRITE;
77 #ifdef CONFIG_PPC_MULTIPLATFORM
79 EXPORT_SYMBOL(_machine);
81 extern void prep_init(unsigned long r3, unsigned long r4,
82 unsigned long r5, unsigned long r6, unsigned long r7);
83 extern void pmac_init(unsigned long r3, unsigned long r4,
84 unsigned long r5, unsigned long r6, unsigned long r7);
85 extern void chrp_init(unsigned long r3, unsigned long r4,
86 unsigned long r5, unsigned long r6, unsigned long r7);
89 #endif /* CONFIG_PPC_MULTIPLATFORM */
92 EXPORT_SYMBOL(have_of);
95 int ppc_do_canonicalize_irqs;
96 EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
99 #ifdef CONFIG_MAGIC_SYSRQ
100 unsigned long SYSRQ_KEY = 0x54;
101 #endif /* CONFIG_MAGIC_SYSRQ */
103 #ifdef CONFIG_VGA_CONSOLE
104 unsigned long vgacon_remap_base;
107 struct machdep_calls ppc_md;
110 * These are used in binfmt_elf.c to put aux entries on the stack
111 * for each elf executable being started.
117 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
118 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
119 struct screen_info screen_info = {
120 0, 25, /* orig-x, orig-y */
122 0, /* orig-video-page */
123 0, /* orig-video-mode */
124 80, /* orig-video-cols */
125 0,0,0, /* ega_ax, ega_bx, ega_cx */
126 25, /* orig-video-lines */
127 1, /* orig-video-isVGA */
128 16 /* orig-video-points */
130 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
132 void machine_restart(char *cmd)
140 void machine_power_off(void)
148 void machine_halt(void)
156 void (*pm_power_off)(void) = machine_power_off;
159 extern u32 cpu_temp(unsigned long cpu);
160 extern u32 cpu_temp_both(unsigned long cpu);
161 #endif /* CONFIG_TAU */
163 int show_cpuinfo(struct seq_file *m, void *v)
168 unsigned short maj, min;
172 /* Show summary information */
174 unsigned long bogosum = 0;
175 for (i = 0; i < NR_CPUS; ++i)
177 bogosum += cpu_data[i].loops_per_jiffy;
178 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
179 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
180 #endif /* CONFIG_SMP */
182 if (ppc_md.show_cpuinfo != NULL)
183 err = ppc_md.show_cpuinfo(m);
190 pvr = cpu_data[i].pvr;
191 lpj = cpu_data[i].loops_per_jiffy;
193 pvr = mfspr(SPRN_PVR);
194 lpj = loops_per_jiffy;
197 seq_printf(m, "processor\t: %d\n", i);
198 seq_printf(m, "cpu\t\t: ");
200 if (cur_cpu_spec->pvr_mask)
201 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
203 seq_printf(m, "unknown (%08x)", pvr);
204 #ifdef CONFIG_ALTIVEC
205 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
206 seq_printf(m, ", altivec supported");
211 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
212 #ifdef CONFIG_TAU_AVERAGE
213 /* more straightforward, but potentially misleading */
214 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
217 /* show the actual temp sensor range */
219 temp = cpu_temp_both(i);
220 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
221 temp & 0xff, temp >> 16);
224 #endif /* CONFIG_TAU */
226 if (ppc_md.show_percpuinfo != NULL) {
227 err = ppc_md.show_percpuinfo(m, i);
232 /* If we are a Freescale core do a simple check so
233 * we dont have to keep adding cases in the future */
234 if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
238 switch (PVR_VER(pvr)) {
239 case 0x0020: /* 403 family */
240 maj = PVR_MAJ(pvr) + 1;
243 case 0x1008: /* 740P/750P ?? */
244 maj = ((pvr >> 8) & 0xFF) - 1;
248 maj = (pvr >> 8) & 0xFF;
254 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
255 maj, min, PVR_VER(pvr), PVR_REV(pvr));
257 seq_printf(m, "bogomips\t: %lu.%02lu\n",
258 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
261 if (cur_ppc_sys_spec->ppc_sys_name)
262 seq_printf(m, "chipset\t\t: %s\n",
263 cur_ppc_sys_spec->ppc_sys_name);
273 static void *c_start(struct seq_file *m, loff_t *pos)
277 return i <= NR_CPUS? (void *) (i + 1): NULL;
280 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
283 return c_start(m, pos);
286 static void c_stop(struct seq_file *m, void *v)
290 struct seq_operations cpuinfo_op = {
294 .show = show_cpuinfo,
298 * We're called here very early in the boot. We determine the machine
299 * type and call the appropriate low-level setup functions.
300 * -- Cort <cort@fsmlabs.com>
302 * Note that the kernel may be running at an address which is different
303 * from the address that it was linked at, so we must use RELOC/PTRRELOC
304 * to access static data (including strings). -- paulus
308 early_init(int r3, int r4, int r5)
311 unsigned long offset = reloc_offset();
314 phys = offset + KERNELBASE;
316 /* First zero the BSS -- use memset, some arches don't have
318 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
321 * Identify the CPU type and fix up code sections
322 * that depend on which cpu we have.
324 identify_cpu(offset, 0);
325 do_cpu_ftr_fixups(offset);
327 #if defined(CONFIG_PPC_MULTIPLATFORM)
330 /* If we came here from BootX, clear the screen,
331 * set up some pointers and return. */
332 if ((r3 == 0x426f6f58) && (r5 == 0))
333 bootx_init(r4, phys);
336 * don't do anything on prep
337 * for now, don't use bootinfo because it breaks yaboot 0.5
338 * and assume that if we didn't find a magic number, we have OF
340 else if (*(unsigned long *)(0) != 0xdeadc0de)
341 phys = prom_init(r3, r4, (prom_entry)r5);
351 * Assume here that all clock rates are the same in a
352 * smp system. -- Cort
355 of_show_percpuinfo(struct seq_file *m, int i)
357 struct device_node *cpu_node;
361 cpu_node = find_type_devices("cpu");
364 for (s = 0; s < i && cpu_node->next; s++)
365 cpu_node = cpu_node->next;
366 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
368 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
373 intuit_machine_type(void)
376 struct device_node *root;
378 /* ask the OF info if we're a chrp or pmac */
379 root = find_path_device("/");
381 /* assume pmac unless proven to be chrp -- Cort */
382 _machine = _MACH_Pmac;
383 model = get_property(root, "device_type", NULL);
384 if (model && !strncmp("chrp", model, 4))
385 _machine = _MACH_chrp;
387 model = get_property(root, "model", NULL);
388 if (model && !strncmp(model, "IBM", 3))
389 _machine = _MACH_chrp;
395 #ifdef CONFIG_PPC_MULTIPLATFORM
397 * The PPC_MULTIPLATFORM version of platform_init...
400 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
401 unsigned long r6, unsigned long r7)
403 #ifdef CONFIG_BOOTX_TEXT
404 if (boot_text_mapped) {
410 parse_bootinfo(find_bootinfo());
412 /* if we didn't get any bootinfo telling us what we are... */
414 /* prep boot loader tells us if we're prep or not */
415 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
416 _machine = _MACH_prep;
419 #ifdef CONFIG_PPC_PREP
420 /* not much more to do here, if prep */
421 if (_machine == _MACH_prep) {
422 prep_init(r3, r4, r5, r6, r7);
429 /* prom_init has already been called from __start */
433 /* If we aren't PReP, we can find out if we're Pmac
434 * or CHRP with this. */
436 intuit_machine_type();
438 /* finish_device_tree may need _machine defined. */
439 finish_device_tree();
442 * If we were booted via quik, r3 points to the physical
443 * address of the command-line parameters.
444 * If we were booted from an xcoff image (i.e. netbooted or
445 * booted from floppy), we get the command line from the
446 * bootargs property of the /chosen node.
447 * If an initial ramdisk is present, r3 and r4
448 * are used for initrd_start and initrd_size,
449 * otherwise they contain 0xdeadbeef.
451 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
452 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
454 } else if (boot_infos != 0) {
455 /* booted by BootX - check for ramdisk */
456 if (boot_infos->kernelParamsOffset != 0)
457 strlcpy(cmd_line, (char *) boot_infos
458 + boot_infos->kernelParamsOffset,
460 #ifdef CONFIG_BLK_DEV_INITRD
461 if (boot_infos->ramDisk) {
462 initrd_start = (unsigned long) boot_infos
463 + boot_infos->ramDisk;
464 initrd_end = initrd_start + boot_infos->ramDiskSize;
465 initrd_below_start_ok = 1;
469 struct device_node *chosen;
472 #ifdef CONFIG_BLK_DEV_INITRD
473 if (r3 && r4 && r4 != 0xdeadbeef) {
477 initrd_end = r3 + r4;
478 ROOT_DEV = Root_RAM0;
479 initrd_below_start_ok = 1;
482 chosen = find_devices("chosen");
483 if (chosen != NULL) {
484 p = get_property(chosen, "bootargs", NULL);
486 strlcpy(cmd_line, p, sizeof(cmd_line));
491 if (strstr(cmd_line, "adb_sync")) {
492 extern int __adb_probe_sync;
493 __adb_probe_sync = 1;
495 #endif /* CONFIG_ADB */
498 #ifdef CONFIG_PPC_PMAC
500 pmac_init(r3, r4, r5, r6, r7);
503 #ifdef CONFIG_PPC_CHRP
505 chrp_init(r3, r4, r5, r6, r7);
511 #ifdef CONFIG_SERIAL_CORE_CONSOLE
512 extern char *of_stdout_device;
514 static int __init set_preferred_console(void)
516 struct device_node *prom_stdout;
520 if (of_stdout_device == NULL)
523 /* The user has requested a console so this is already set up. */
524 if (strstr(saved_command_line, "console="))
527 prom_stdout = find_path_device(of_stdout_device);
531 name = (char *)get_property(prom_stdout, "name", NULL);
535 if (strcmp(name, "serial") == 0) {
537 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
553 /* We dont recognise the serial port */
557 } else if (strcmp(name, "ch-a") == 0)
559 else if (strcmp(name, "ch-b") == 0)
563 return add_preferred_console("ttyS", offset, NULL);
565 console_initcall(set_preferred_console);
566 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
567 #endif /* CONFIG_PPC_MULTIPLATFORM */
569 struct bi_record *find_bootinfo(void)
571 struct bi_record *rec;
573 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
574 if ( rec->tag != BI_FIRST ) {
576 * This 0x10000 offset is a terrible hack but it will go away when
577 * we have the bootloader handle all the relocation and
580 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
581 if ( rec->tag != BI_FIRST )
587 void parse_bootinfo(struct bi_record *rec)
589 if (rec == NULL || rec->tag != BI_FIRST)
591 while (rec->tag != BI_LAST) {
592 ulong *data = rec->data;
595 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
597 #ifdef CONFIG_BLK_DEV_INITRD
599 initrd_start = data[0] + KERNELBASE;
600 initrd_end = data[0] + data[1] + KERNELBASE;
602 #endif /* CONFIG_BLK_DEV_INITRD */
603 #ifdef CONFIG_PPC_MULTIPLATFORM
605 /* Machine types changed with the merge. Since the
606 * bootinfo are now deprecated, we can just hard code
607 * the appropriate conversion here for when we are
608 * called with yaboot which passes us a machine type
612 case 1: _machine = _MACH_prep; break;
613 case 2: _machine = _MACH_Pmac; break;
614 case 4: _machine = _MACH_chrp; break;
621 boot_mem_size = data[0];
624 rec = (struct bi_record *)((ulong)rec + rec->size);
629 * Find out what kind of machine we're on and save any data we need
630 * from the early boot process (devtree is copied on pmac by prom_init()).
631 * This is called very early on the boot process, after a minimal
632 * MMU environment has been set up but before MMU_init is called.
635 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
636 unsigned long r6, unsigned long r7)
638 #ifdef CONFIG_CMDLINE
639 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
640 #endif /* CONFIG_CMDLINE */
643 ppc_md.power_save = ppc6xx_idle;
646 ppc_md.power_save = power4_idle;
649 platform_init(r3, r4, r5, r6, r7);
652 ppc_md.progress("id mach(): done", 0x200);
654 #ifdef CONFIG_BOOKE_WDT
655 /* Checks wdt=x and wdt_period=xx command-line option */
656 int __init early_parse_wdt(char *p)
658 if (p && strncmp(p, "0", 1) != 0)
659 booke_wdt_enabled = 1;
663 early_param("wdt", early_parse_wdt);
665 int __init early_parse_wdt_period (char *p)
668 booke_wdt_period = simple_strtoul(p, NULL, 0);
672 early_param("wdt_period", early_parse_wdt_period);
673 #endif /* CONFIG_BOOKE_WDT */
675 /* Checks "l2cr=xxxx" command-line option */
676 int __init ppc_setup_l2cr(char *str)
678 if (cpu_has_feature(CPU_FTR_L2CR)) {
679 unsigned long val = simple_strtoul(str, NULL, 0);
680 printk(KERN_INFO "l2cr set to %lx\n", val);
681 _set_L2CR(0); /* force invalidate by disable cache */
682 _set_L2CR(val); /* and enable it */
686 __setup("l2cr=", ppc_setup_l2cr);
688 #ifdef CONFIG_GENERIC_NVRAM
690 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
691 unsigned char nvram_read_byte(int addr)
693 if (ppc_md.nvram_read_val)
694 return ppc_md.nvram_read_val(addr);
697 EXPORT_SYMBOL(nvram_read_byte);
699 void nvram_write_byte(unsigned char val, int addr)
701 if (ppc_md.nvram_write_val)
702 ppc_md.nvram_write_val(addr, val);
704 EXPORT_SYMBOL(nvram_write_byte);
706 void nvram_sync(void)
708 if (ppc_md.nvram_sync)
711 EXPORT_SYMBOL(nvram_sync);
713 #endif /* CONFIG_NVRAM */
715 static struct cpu cpu_devices[NR_CPUS];
717 int __init ppc_init(void)
721 /* clear the progress line */
722 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
724 /* register CPU devices */
725 for (i = 0; i < NR_CPUS; i++)
727 register_cpu(&cpu_devices[i], i, NULL);
729 /* call platform init */
730 if (ppc_md.init != NULL) {
736 arch_initcall(ppc_init);
738 /* Warning, IO base is not yet inited */
739 void __init setup_arch(char **cmdline_p)
742 extern void do_init_bootmem(void);
744 /* so udelay does something sensible, assume <= 1000 bogomips */
745 loops_per_jiffy = 500000000 / HZ;
747 #ifdef CONFIG_PPC_MULTIPLATFORM
748 /* This could be called "early setup arch", it must be done
749 * now because xmon need it
751 if (_machine == _MACH_Pmac)
752 pmac_feature_init(); /* New cool way */
757 if (strstr(cmd_line, "xmon"))
759 #endif /* CONFIG_XMON */
760 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
762 #if defined(CONFIG_KGDB)
763 if (ppc_md.kgdb_map_scc)
764 ppc_md.kgdb_map_scc();
766 if (strstr(cmd_line, "gdb")) {
768 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
769 printk("kgdb breakpoint activated\n");
775 * Set cache line size based on type of cpu as a default.
776 * Systems with OF can look in the properties on the cpu node(s)
777 * for a possibly more accurate value.
779 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
780 dcache_bsize = cur_cpu_spec->dcache_bsize;
781 icache_bsize = cur_cpu_spec->icache_bsize;
784 ucache_bsize = dcache_bsize = icache_bsize
785 = cur_cpu_spec->dcache_bsize;
787 /* reboot on panic */
790 init_mm.start_code = PAGE_OFFSET;
791 init_mm.end_code = (unsigned long) _etext;
792 init_mm.end_data = (unsigned long) _edata;
793 init_mm.brk = (unsigned long) klimit;
795 /* Save unparsed command line copy for /proc/cmdline */
796 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
797 *cmdline_p = cmd_line;
801 /* set up the bootmem stuff with available memory */
803 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
805 #ifdef CONFIG_PPC_OCP
806 /* Initialize OCP device list */
808 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
811 #ifdef CONFIG_DUMMY_CONSOLE
812 conswitchp = &dummy_con;
816 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
820 /* this is for modules since _machine can be a define -- Cort */
821 ppc_md.ppc_machine = _machine;