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 long DMA_MODE_READ, DMA_MODE_WRITE;
76 #ifdef CONFIG_PPC_MULTIPLATFORM
79 extern void prep_init(unsigned long r3, unsigned long r4,
80 unsigned long r5, unsigned long r6, unsigned long r7);
81 extern void pmac_init(unsigned long r3, unsigned long r4,
82 unsigned long r5, unsigned long r6, unsigned long r7);
83 extern void chrp_init(unsigned long r3, unsigned long r4,
84 unsigned long r5, unsigned long r6, unsigned long r7);
85 #endif /* CONFIG_PPC_MULTIPLATFORM */
87 #ifdef CONFIG_MAGIC_SYSRQ
88 unsigned long SYSRQ_KEY = 0x54;
89 #endif /* CONFIG_MAGIC_SYSRQ */
91 #ifdef CONFIG_VGA_CONSOLE
92 unsigned long vgacon_remap_base;
95 struct machdep_calls ppc_md;
98 * These are used in binfmt_elf.c to put aux entries on the stack
99 * for each elf executable being started.
105 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
106 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
107 struct screen_info screen_info = {
108 0, 25, /* orig-x, orig-y */
110 0, /* orig-video-page */
111 0, /* orig-video-mode */
112 80, /* orig-video-cols */
113 0,0,0, /* ega_ax, ega_bx, ega_cx */
114 25, /* orig-video-lines */
115 1, /* orig-video-isVGA */
116 16 /* orig-video-points */
118 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
120 void machine_restart(char *cmd)
128 void machine_power_off(void)
136 void machine_halt(void)
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;
181 pvr = mfspr(SPRN_PVR);
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 /* If we are a Freescale core do a simple check so
221 * we dont have to keep adding cases in the future */
222 if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
226 switch (PVR_VER(pvr)) {
227 case 0x0020: /* 403 family */
228 maj = PVR_MAJ(pvr) + 1;
231 case 0x1008: /* 740P/750P ?? */
232 maj = ((pvr >> 8) & 0xFF) - 1;
236 maj = (pvr >> 8) & 0xFF;
242 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
243 maj, min, PVR_VER(pvr), PVR_REV(pvr));
245 seq_printf(m, "bogomips\t: %lu.%02lu\n",
246 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
249 if (cur_ppc_sys_spec->ppc_sys_name)
250 seq_printf(m, "chipset\t\t: %s\n",
251 cur_ppc_sys_spec->ppc_sys_name);
261 static void *c_start(struct seq_file *m, loff_t *pos)
265 return i <= NR_CPUS? (void *) (i + 1): NULL;
268 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
271 return c_start(m, pos);
274 static void c_stop(struct seq_file *m, void *v)
278 struct seq_operations cpuinfo_op = {
282 .show = show_cpuinfo,
286 * We're called here very early in the boot. We determine the machine
287 * type and call the appropriate low-level setup functions.
288 * -- Cort <cort@fsmlabs.com>
290 * Note that the kernel may be running at an address which is different
291 * from the address that it was linked at, so we must use RELOC/PTRRELOC
292 * to access static data (including strings). -- paulus
296 early_init(int r3, int r4, int r5)
299 unsigned long offset = reloc_offset();
302 phys = offset + KERNELBASE;
304 /* First zero the BSS -- use memset, some arches don't have
306 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
309 * Identify the CPU type and fix up code sections
310 * that depend on which cpu we have.
312 identify_cpu(offset, 0);
313 do_cpu_ftr_fixups(offset);
315 #if defined(CONFIG_PPC_MULTIPLATFORM)
318 /* If we came here from BootX, clear the screen,
319 * set up some pointers and return. */
320 if ((r3 == 0x426f6f58) && (r5 == 0))
321 bootx_init(r4, phys);
324 * don't do anything on prep
325 * for now, don't use bootinfo because it breaks yaboot 0.5
326 * and assume that if we didn't find a magic number, we have OF
328 else if (*(unsigned long *)(0) != 0xdeadc0de)
329 phys = prom_init(r3, r4, (prom_entry)r5);
339 * Assume here that all clock rates are the same in a
340 * smp system. -- Cort
343 of_show_percpuinfo(struct seq_file *m, int i)
345 struct device_node *cpu_node;
349 cpu_node = find_type_devices("cpu");
352 for (s = 0; s < i && cpu_node->next; s++)
353 cpu_node = cpu_node->next;
354 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
356 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
361 intuit_machine_type(void)
364 struct device_node *root;
366 /* ask the OF info if we're a chrp or pmac */
367 root = find_path_device("/");
369 /* assume pmac unless proven to be chrp -- Cort */
370 _machine = _MACH_Pmac;
371 model = get_property(root, "device_type", NULL);
372 if (model && !strncmp("chrp", model, 4))
373 _machine = _MACH_chrp;
375 model = get_property(root, "model", NULL);
376 if (model && !strncmp(model, "IBM", 3))
377 _machine = _MACH_chrp;
383 #ifdef CONFIG_PPC_MULTIPLATFORM
385 * The PPC_MULTIPLATFORM version of platform_init...
388 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
389 unsigned long r6, unsigned long r7)
391 #ifdef CONFIG_BOOTX_TEXT
392 if (boot_text_mapped) {
398 parse_bootinfo(find_bootinfo());
400 /* if we didn't get any bootinfo telling us what we are... */
402 /* prep boot loader tells us if we're prep or not */
403 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
404 _machine = _MACH_prep;
407 /* not much more to do here, if prep */
408 if (_machine == _MACH_prep) {
409 prep_init(r3, r4, r5, r6, r7);
413 /* prom_init has already been called from __start */
417 /* If we aren't PReP, we can find out if we're Pmac
418 * or CHRP with this. */
420 intuit_machine_type();
422 /* finish_device_tree may need _machine defined. */
423 finish_device_tree();
426 * If we were booted via quik, r3 points to the physical
427 * address of the command-line parameters.
428 * If we were booted from an xcoff image (i.e. netbooted or
429 * booted from floppy), we get the command line from the
430 * bootargs property of the /chosen node.
431 * If an initial ramdisk is present, r3 and r4
432 * are used for initrd_start and initrd_size,
433 * otherwise they contain 0xdeadbeef.
435 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
436 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
438 } else if (boot_infos != 0) {
439 /* booted by BootX - check for ramdisk */
440 if (boot_infos->kernelParamsOffset != 0)
441 strlcpy(cmd_line, (char *) boot_infos
442 + boot_infos->kernelParamsOffset,
444 #ifdef CONFIG_BLK_DEV_INITRD
445 if (boot_infos->ramDisk) {
446 initrd_start = (unsigned long) boot_infos
447 + boot_infos->ramDisk;
448 initrd_end = initrd_start + boot_infos->ramDiskSize;
449 initrd_below_start_ok = 1;
453 struct device_node *chosen;
456 #ifdef CONFIG_BLK_DEV_INITRD
457 if (r3 && r4 && r4 != 0xdeadbeef) {
461 initrd_end = r3 + r4;
462 ROOT_DEV = Root_RAM0;
463 initrd_below_start_ok = 1;
466 chosen = find_devices("chosen");
467 if (chosen != NULL) {
468 p = get_property(chosen, "bootargs", NULL);
470 strlcpy(cmd_line, p, sizeof(cmd_line));
475 if (strstr(cmd_line, "adb_sync")) {
476 extern int __adb_probe_sync;
477 __adb_probe_sync = 1;
479 #endif /* CONFIG_ADB */
483 pmac_init(r3, r4, r5, r6, r7);
486 chrp_init(r3, r4, r5, r6, r7);
491 #ifdef CONFIG_SERIAL_CORE_CONSOLE
492 extern char *of_stdout_device;
494 static int __init set_preferred_console(void)
496 struct device_node *prom_stdout;
500 if (of_stdout_device == NULL)
503 /* The user has requested a console so this is already set up. */
504 if (strstr(saved_command_line, "console="))
507 prom_stdout = find_path_device(of_stdout_device);
511 name = (char *)get_property(prom_stdout, "name", NULL);
515 if (strcmp(name, "serial") == 0) {
517 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
533 /* We dont recognise the serial port */
537 } else if (strcmp(name, "ch-a") == 0)
539 else if (strcmp(name, "ch-b") == 0)
543 return add_preferred_console("ttyS", offset, NULL);
545 console_initcall(set_preferred_console);
546 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
547 #endif /* CONFIG_PPC_MULTIPLATFORM */
549 struct bi_record *find_bootinfo(void)
551 struct bi_record *rec;
553 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
554 if ( rec->tag != BI_FIRST ) {
556 * This 0x10000 offset is a terrible hack but it will go away when
557 * we have the bootloader handle all the relocation and
560 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
561 if ( rec->tag != BI_FIRST )
567 void parse_bootinfo(struct bi_record *rec)
569 if (rec == NULL || rec->tag != BI_FIRST)
571 while (rec->tag != BI_LAST) {
572 ulong *data = rec->data;
575 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
577 #ifdef CONFIG_BLK_DEV_INITRD
579 initrd_start = data[0] + KERNELBASE;
580 initrd_end = data[0] + data[1] + KERNELBASE;
582 #endif /* CONFIG_BLK_DEV_INITRD */
583 #ifdef CONFIG_PPC_MULTIPLATFORM
589 boot_mem_size = data[0];
592 rec = (struct bi_record *)((ulong)rec + rec->size);
597 * Find out what kind of machine we're on and save any data we need
598 * from the early boot process (devtree is copied on pmac by prom_init()).
599 * This is called very early on the boot process, after a minimal
600 * MMU environment has been set up but before MMU_init is called.
603 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
604 unsigned long r6, unsigned long r7)
606 #ifdef CONFIG_CMDLINE
607 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
608 #endif /* CONFIG_CMDLINE */
611 ppc_md.power_save = ppc6xx_idle;
614 ppc_md.power_save = power4_idle;
617 platform_init(r3, r4, r5, r6, r7);
620 ppc_md.progress("id mach(): done", 0x200);
622 #ifdef CONFIG_BOOKE_WDT
623 /* Checks wdt=x and wdt_period=xx command-line option */
624 int __init early_parse_wdt(char *p)
626 if (p && strncmp(p, "0", 1) != 0)
627 booke_wdt_enabled = 1;
631 early_param("wdt", early_parse_wdt);
633 int __init early_parse_wdt_period (char *p)
636 booke_wdt_period = simple_strtoul(p, NULL, 0);
640 early_param("wdt_period", early_parse_wdt_period);
641 #endif /* CONFIG_BOOKE_WDT */
643 /* Checks "l2cr=xxxx" command-line option */
644 int __init ppc_setup_l2cr(char *str)
646 if (cpu_has_feature(CPU_FTR_L2CR)) {
647 unsigned long val = simple_strtoul(str, NULL, 0);
648 printk(KERN_INFO "l2cr set to %lx\n", val);
649 _set_L2CR(0); /* force invalidate by disable cache */
650 _set_L2CR(val); /* and enable it */
654 __setup("l2cr=", ppc_setup_l2cr);
656 #ifdef CONFIG_GENERIC_NVRAM
658 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
659 unsigned char nvram_read_byte(int addr)
661 if (ppc_md.nvram_read_val)
662 return ppc_md.nvram_read_val(addr);
665 EXPORT_SYMBOL(nvram_read_byte);
667 void nvram_write_byte(unsigned char val, int addr)
669 if (ppc_md.nvram_write_val)
670 ppc_md.nvram_write_val(addr, val);
672 EXPORT_SYMBOL(nvram_write_byte);
674 void nvram_sync(void)
676 if (ppc_md.nvram_sync)
679 EXPORT_SYMBOL(nvram_sync);
681 #endif /* CONFIG_NVRAM */
683 static struct cpu cpu_devices[NR_CPUS];
685 int __init ppc_init(void)
689 /* clear the progress line */
690 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
692 /* register CPU devices */
693 for (i = 0; i < NR_CPUS; i++)
695 register_cpu(&cpu_devices[i], i, NULL);
697 /* call platform init */
698 if (ppc_md.init != NULL) {
704 arch_initcall(ppc_init);
706 /* Warning, IO base is not yet inited */
707 void __init setup_arch(char **cmdline_p)
710 extern void do_init_bootmem(void);
712 /* so udelay does something sensible, assume <= 1000 bogomips */
713 loops_per_jiffy = 500000000 / HZ;
715 #ifdef CONFIG_PPC_MULTIPLATFORM
716 /* This could be called "early setup arch", it must be done
717 * now because xmon need it
719 if (_machine == _MACH_Pmac)
720 pmac_feature_init(); /* New cool way */
725 if (strstr(cmd_line, "xmon"))
727 #endif /* CONFIG_XMON */
728 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
730 #if defined(CONFIG_KGDB)
731 if (ppc_md.kgdb_map_scc)
732 ppc_md.kgdb_map_scc();
734 if (strstr(cmd_line, "gdb")) {
736 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
737 printk("kgdb breakpoint activated\n");
743 * Set cache line size based on type of cpu as a default.
744 * Systems with OF can look in the properties on the cpu node(s)
745 * for a possibly more accurate value.
747 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
748 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
749 icache_bsize = cur_cpu_spec[0]->icache_bsize;
752 ucache_bsize = dcache_bsize = icache_bsize
753 = cur_cpu_spec[0]->dcache_bsize;
755 /* reboot on panic */
758 init_mm.start_code = PAGE_OFFSET;
759 init_mm.end_code = (unsigned long) _etext;
760 init_mm.end_data = (unsigned long) _edata;
761 init_mm.brk = (unsigned long) klimit;
763 /* Save unparsed command line copy for /proc/cmdline */
764 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
765 *cmdline_p = cmd_line;
769 /* set up the bootmem stuff with available memory */
771 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
773 #ifdef CONFIG_PPC_OCP
774 /* Initialize OCP device list */
776 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
779 #ifdef CONFIG_DUMMY_CONSOLE
780 conswitchp = &dummy_con;
784 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
788 /* this is for modules since _machine can be a define -- Cort */
789 ppc_md.ppc_machine = _machine;