2 * Common prep/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/sections.h>
39 #include <asm/nvram.h>
43 #define USES_PPC_SYS (defined(CONFIG_85xx) || defined(CONFIG_83xx) || \
44 defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \
45 defined(CONFIG_PPC_MPC52xx))
48 #include <asm/ppc_sys.h>
51 #if defined CONFIG_KGDB
55 extern void platform_init(unsigned long r3, unsigned long r4,
56 unsigned long r5, unsigned long r6, unsigned long r7);
57 extern void identify_cpu(unsigned long offset, unsigned long cpu);
58 extern void do_cpu_ftr_fixups(unsigned long offset);
59 extern void reloc_got2(unsigned long offset);
61 extern void ppc6xx_idle(void);
62 extern void power4_idle(void);
64 extern boot_infos_t *boot_infos;
65 struct ide_machdep_calls ppc_ide_md;
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 int DMA_MODE_READ;
73 unsigned int DMA_MODE_WRITE;
75 #ifdef CONFIG_PPC_MULTIPLATFORM
77 EXPORT_SYMBOL(_machine);
79 extern void prep_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);
85 #endif /* CONFIG_PPC_MULTIPLATFORM */
88 EXPORT_SYMBOL(have_of);
91 int ppc_do_canonicalize_irqs;
92 EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
95 #ifdef CONFIG_MAGIC_SYSRQ
96 unsigned long SYSRQ_KEY = 0x54;
97 #endif /* CONFIG_MAGIC_SYSRQ */
99 #ifdef CONFIG_VGA_CONSOLE
100 unsigned long vgacon_remap_base;
103 struct machdep_calls ppc_md;
106 * These are used in binfmt_elf.c to put aux entries on the stack
107 * for each elf executable being started.
113 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
114 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
115 struct screen_info screen_info = {
116 0, 25, /* orig-x, orig-y */
118 0, /* orig-video-page */
119 0, /* orig-video-mode */
120 80, /* orig-video-cols */
121 0,0,0, /* ega_ax, ega_bx, ega_cx */
122 25, /* orig-video-lines */
123 1, /* orig-video-isVGA */
124 16 /* orig-video-points */
126 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
128 void machine_restart(char *cmd)
136 void machine_power_off(void)
144 void machine_halt(void)
152 void (*pm_power_off)(void) = machine_power_off;
155 extern u32 cpu_temp(unsigned long cpu);
156 extern u32 cpu_temp_both(unsigned long cpu);
157 #endif /* CONFIG_TAU */
159 int show_cpuinfo(struct seq_file *m, void *v)
164 unsigned short maj, min;
168 /* Show summary information */
170 unsigned long bogosum = 0;
171 for (i = 0; i < NR_CPUS; ++i)
173 bogosum += cpu_data[i].loops_per_jiffy;
174 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
175 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
176 #endif /* CONFIG_SMP */
178 if (ppc_md.show_cpuinfo != NULL)
179 err = ppc_md.show_cpuinfo(m);
186 pvr = cpu_data[i].pvr;
187 lpj = cpu_data[i].loops_per_jiffy;
189 pvr = mfspr(SPRN_PVR);
190 lpj = loops_per_jiffy;
193 seq_printf(m, "processor\t: %d\n", i);
194 seq_printf(m, "cpu\t\t: ");
196 if (cur_cpu_spec->pvr_mask)
197 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
199 seq_printf(m, "unknown (%08x)", pvr);
200 #ifdef CONFIG_ALTIVEC
201 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
202 seq_printf(m, ", altivec supported");
207 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
208 #ifdef CONFIG_TAU_AVERAGE
209 /* more straightforward, but potentially misleading */
210 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
213 /* show the actual temp sensor range */
215 temp = cpu_temp_both(i);
216 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
217 temp & 0xff, temp >> 16);
220 #endif /* CONFIG_TAU */
222 if (ppc_md.show_percpuinfo != NULL) {
223 err = ppc_md.show_percpuinfo(m, i);
228 /* If we are a Freescale core do a simple check so
229 * we dont have to keep adding cases in the future */
230 if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
234 switch (PVR_VER(pvr)) {
235 case 0x0020: /* 403 family */
236 maj = PVR_MAJ(pvr) + 1;
239 case 0x1008: /* 740P/750P ?? */
240 maj = ((pvr >> 8) & 0xFF) - 1;
244 maj = (pvr >> 8) & 0xFF;
250 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
251 maj, min, PVR_VER(pvr), PVR_REV(pvr));
253 seq_printf(m, "bogomips\t: %lu.%02lu\n",
254 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
257 if (cur_ppc_sys_spec->ppc_sys_name)
258 seq_printf(m, "chipset\t\t: %s\n",
259 cur_ppc_sys_spec->ppc_sys_name);
269 static void *c_start(struct seq_file *m, loff_t *pos)
273 return i <= NR_CPUS? (void *) (i + 1): NULL;
276 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
279 return c_start(m, pos);
282 static void c_stop(struct seq_file *m, void *v)
286 struct seq_operations cpuinfo_op = {
290 .show = show_cpuinfo,
294 * We're called here very early in the boot. We determine the machine
295 * type and call the appropriate low-level setup functions.
296 * -- Cort <cort@fsmlabs.com>
298 * Note that the kernel may be running at an address which is different
299 * from the address that it was linked at, so we must use RELOC/PTRRELOC
300 * to access static data (including strings). -- paulus
304 early_init(int r3, int r4, int r5)
307 unsigned long offset = reloc_offset();
310 phys = offset + KERNELBASE;
312 /* First zero the BSS -- use memset, some arches don't have
314 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
317 * Identify the CPU type and fix up code sections
318 * that depend on which cpu we have.
320 identify_cpu(offset, 0);
321 do_cpu_ftr_fixups(offset);
323 #if defined(CONFIG_PPC_OF)
327 * don't do anything on prep
328 * for now, don't use bootinfo because it breaks yaboot 0.5
329 * and assume that if we didn't find a magic number, we have OF
331 if (*(unsigned long *)(0) != 0xdeadc0de)
332 phys = prom_init(r3, r4, (prom_entry)r5);
342 * Assume here that all clock rates are the same in a
343 * smp system. -- Cort
346 of_show_percpuinfo(struct seq_file *m, int i)
348 struct device_node *cpu_node;
352 cpu_node = find_type_devices("cpu");
355 for (s = 0; s < i && cpu_node->next; s++)
356 cpu_node = cpu_node->next;
357 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
359 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
364 intuit_machine_type(void)
367 struct device_node *root;
369 /* ask the OF info if we're a chrp or pmac */
370 root = find_path_device("/");
372 /* assume pmac unless proven to be chrp -- Cort */
373 _machine = _MACH_Pmac;
374 model = get_property(root, "device_type", NULL);
375 if (model && !strncmp("chrp", model, 4))
376 _machine = _MACH_chrp;
378 model = get_property(root, "model", NULL);
379 if (model && !strncmp(model, "IBM", 3))
380 _machine = _MACH_chrp;
386 #ifdef CONFIG_PPC_MULTIPLATFORM
388 * The PPC_MULTIPLATFORM version of platform_init...
391 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
392 unsigned long r6, unsigned long r7)
394 #ifdef CONFIG_BOOTX_TEXT
395 if (boot_text_mapped) {
401 parse_bootinfo(find_bootinfo());
403 /* if we didn't get any bootinfo telling us what we are... */
405 /* prep boot loader tells us if we're prep or not */
406 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
407 _machine = _MACH_prep;
410 #ifdef CONFIG_PPC_PREP
411 /* not much more to do here, if prep */
412 if (_machine == _MACH_prep) {
413 prep_init(r3, r4, r5, r6, r7);
421 /* prom_init has already been called from __start */
425 /* If we aren't PReP, we can find out if we're Pmac
426 * or CHRP with this. */
428 intuit_machine_type();
430 /* finish_device_tree may need _machine defined. */
431 finish_device_tree();
434 * If we were booted via quik, r3 points to the physical
435 * address of the command-line parameters.
436 * If we were booted from an xcoff image (i.e. netbooted or
437 * booted from floppy), we get the command line from the
438 * bootargs property of the /chosen node.
439 * If an initial ramdisk is present, r3 and r4
440 * are used for initrd_start and initrd_size,
441 * otherwise they contain 0xdeadbeef.
443 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
444 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
446 } else if (boot_infos != 0) {
447 /* booted by BootX - check for ramdisk */
448 if (boot_infos->kernelParamsOffset != 0)
449 strlcpy(cmd_line, (char *) boot_infos
450 + boot_infos->kernelParamsOffset,
452 #ifdef CONFIG_BLK_DEV_INITRD
453 if (boot_infos->ramDisk) {
454 initrd_start = (unsigned long) boot_infos
455 + boot_infos->ramDisk;
456 initrd_end = initrd_start + boot_infos->ramDiskSize;
457 initrd_below_start_ok = 1;
461 struct device_node *chosen;
464 #ifdef CONFIG_BLK_DEV_INITRD
465 if (r3 && r4 && r4 != 0xdeadbeef) {
469 initrd_end = r3 + r4;
470 ROOT_DEV = Root_RAM0;
471 initrd_below_start_ok = 1;
474 chosen = find_devices("chosen");
475 if (chosen != NULL) {
476 p = get_property(chosen, "bootargs", NULL);
478 strlcpy(cmd_line, p, sizeof(cmd_line));
483 if (strstr(cmd_line, "adb_sync")) {
484 extern int __adb_probe_sync;
485 __adb_probe_sync = 1;
487 #endif /* CONFIG_ADB */
490 #ifdef CONFIG_PPC_CHRP
492 chrp_init(r3, r4, r5, r6, r7);
496 #endif /* CONFIG_PPC_OF */
498 #endif /* CONFIG_PPC_MULTIPLATFORM */
501 #ifdef CONFIG_SERIAL_CORE_CONSOLE
502 extern char *of_stdout_device;
504 static int __init set_preferred_console(void)
506 struct device_node *prom_stdout;
510 if (of_stdout_device == NULL)
513 /* The user has requested a console so this is already set up. */
514 if (strstr(saved_command_line, "console="))
517 prom_stdout = find_path_device(of_stdout_device);
521 name = (char *)get_property(prom_stdout, "name", NULL);
525 if (strcmp(name, "serial") == 0) {
527 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
543 /* We dont recognise the serial port */
547 } else if (strcmp(name, "ch-a") == 0)
549 else if (strcmp(name, "ch-b") == 0)
553 return add_preferred_console("ttyS", offset, NULL);
555 console_initcall(set_preferred_console);
556 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
557 #endif /* CONFIG_PPC_OF */
559 struct bi_record *find_bootinfo(void)
561 struct bi_record *rec;
563 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
564 if ( rec->tag != BI_FIRST ) {
566 * This 0x10000 offset is a terrible hack but it will go away when
567 * we have the bootloader handle all the relocation and
570 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
571 if ( rec->tag != BI_FIRST )
577 void parse_bootinfo(struct bi_record *rec)
579 if (rec == NULL || rec->tag != BI_FIRST)
581 while (rec->tag != BI_LAST) {
582 ulong *data = rec->data;
585 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
587 #ifdef CONFIG_BLK_DEV_INITRD
589 initrd_start = data[0] + KERNELBASE;
590 initrd_end = data[0] + data[1] + KERNELBASE;
592 #endif /* CONFIG_BLK_DEV_INITRD */
593 #ifdef CONFIG_PPC_MULTIPLATFORM
595 /* Machine types changed with the merge. Since the
596 * bootinfo are now deprecated, we can just hard code
597 * the appropriate conversion here for when we are
598 * called with yaboot which passes us a machine type
602 case 1: _machine = _MACH_prep; break;
603 case 2: _machine = _MACH_Pmac; break;
604 case 4: _machine = _MACH_chrp; break;
611 boot_mem_size = data[0];
614 rec = (struct bi_record *)((ulong)rec + rec->size);
619 * Find out what kind of machine we're on and save any data we need
620 * from the early boot process (devtree is copied on pmac by prom_init()).
621 * This is called very early on the boot process, after a minimal
622 * MMU environment has been set up but before MMU_init is called.
625 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
626 unsigned long r6, unsigned long r7)
628 #ifdef CONFIG_CMDLINE
629 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
630 #endif /* CONFIG_CMDLINE */
633 ppc_md.power_save = ppc6xx_idle;
636 ppc_md.power_save = power4_idle;
639 platform_init(r3, r4, r5, r6, r7);
642 ppc_md.progress("id mach(): done", 0x200);
644 #ifdef CONFIG_BOOKE_WDT
645 /* Checks wdt=x and wdt_period=xx command-line option */
646 int __init early_parse_wdt(char *p)
648 if (p && strncmp(p, "0", 1) != 0)
649 booke_wdt_enabled = 1;
653 early_param("wdt", early_parse_wdt);
655 int __init early_parse_wdt_period (char *p)
658 booke_wdt_period = simple_strtoul(p, NULL, 0);
662 early_param("wdt_period", early_parse_wdt_period);
663 #endif /* CONFIG_BOOKE_WDT */
665 /* Checks "l2cr=xxxx" command-line option */
666 int __init ppc_setup_l2cr(char *str)
668 if (cpu_has_feature(CPU_FTR_L2CR)) {
669 unsigned long val = simple_strtoul(str, NULL, 0);
670 printk(KERN_INFO "l2cr set to %lx\n", val);
671 _set_L2CR(0); /* force invalidate by disable cache */
672 _set_L2CR(val); /* and enable it */
676 __setup("l2cr=", ppc_setup_l2cr);
678 #ifdef CONFIG_GENERIC_NVRAM
680 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
681 unsigned char nvram_read_byte(int addr)
683 if (ppc_md.nvram_read_val)
684 return ppc_md.nvram_read_val(addr);
687 EXPORT_SYMBOL(nvram_read_byte);
689 void nvram_write_byte(unsigned char val, int addr)
691 if (ppc_md.nvram_write_val)
692 ppc_md.nvram_write_val(addr, val);
694 EXPORT_SYMBOL(nvram_write_byte);
696 void nvram_sync(void)
698 if (ppc_md.nvram_sync)
701 EXPORT_SYMBOL(nvram_sync);
703 #endif /* CONFIG_NVRAM */
705 static struct cpu cpu_devices[NR_CPUS];
707 int __init ppc_init(void)
711 /* clear the progress line */
712 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
714 /* register CPU devices */
715 for (i = 0; i < NR_CPUS; i++)
717 register_cpu(&cpu_devices[i], i, NULL);
719 /* call platform init */
720 if (ppc_md.init != NULL) {
726 arch_initcall(ppc_init);
728 /* Warning, IO base is not yet inited */
729 void __init setup_arch(char **cmdline_p)
732 extern void do_init_bootmem(void);
734 /* so udelay does something sensible, assume <= 1000 bogomips */
735 loops_per_jiffy = 500000000 / HZ;
737 if (ppc_md.init_early)
742 if (strstr(cmd_line, "xmon"))
744 #endif /* CONFIG_XMON */
745 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
747 #if defined(CONFIG_KGDB)
748 if (ppc_md.kgdb_map_scc)
749 ppc_md.kgdb_map_scc();
751 if (strstr(cmd_line, "gdb")) {
753 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
754 printk("kgdb breakpoint activated\n");
760 * Set cache line size based on type of cpu as a default.
761 * Systems with OF can look in the properties on the cpu node(s)
762 * for a possibly more accurate value.
764 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
765 dcache_bsize = cur_cpu_spec->dcache_bsize;
766 icache_bsize = cur_cpu_spec->icache_bsize;
769 ucache_bsize = dcache_bsize = icache_bsize
770 = cur_cpu_spec->dcache_bsize;
772 /* reboot on panic */
775 init_mm.start_code = PAGE_OFFSET;
776 init_mm.end_code = (unsigned long) _etext;
777 init_mm.end_data = (unsigned long) _edata;
778 init_mm.brk = (unsigned long) klimit;
780 /* Save unparsed command line copy for /proc/cmdline */
781 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
782 *cmdline_p = cmd_line;
786 /* set up the bootmem stuff with available memory */
788 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
790 #ifdef CONFIG_PPC_OCP
791 /* Initialize OCP device list */
793 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
796 #ifdef CONFIG_DUMMY_CONSOLE
797 conswitchp = &dummy_con;
801 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
805 /* this is for modules since _machine can be a define -- Cort */
806 ppc_md.ppc_machine = _machine;