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) || defined(CONFIG_MPC10X_BRIDGE)
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 /* 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)
124 void machine_power_off(void)
132 void machine_halt(void)
140 void (*pm_power_off)(void) = machine_power_off;
143 extern u32 cpu_temp(unsigned long cpu);
144 extern u32 cpu_temp_both(unsigned long cpu);
145 #endif /* CONFIG_TAU */
147 int show_cpuinfo(struct seq_file *m, void *v)
152 unsigned short maj, min;
156 /* Show summary information */
158 unsigned long bogosum = 0;
159 for (i = 0; i < NR_CPUS; ++i)
161 bogosum += cpu_data[i].loops_per_jiffy;
162 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
163 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
164 #endif /* CONFIG_SMP */
166 if (ppc_md.show_cpuinfo != NULL)
167 err = ppc_md.show_cpuinfo(m);
174 pvr = cpu_data[i].pvr;
175 lpj = cpu_data[i].loops_per_jiffy;
177 pvr = mfspr(SPRN_PVR);
178 lpj = loops_per_jiffy;
181 seq_printf(m, "processor\t: %d\n", i);
182 seq_printf(m, "cpu\t\t: ");
184 if (cur_cpu_spec[i]->pvr_mask)
185 seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
187 seq_printf(m, "unknown (%08x)", pvr);
188 #ifdef CONFIG_ALTIVEC
189 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
190 seq_printf(m, ", altivec supported");
195 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_TAU) {
196 #ifdef CONFIG_TAU_AVERAGE
197 /* more straightforward, but potentially misleading */
198 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
201 /* show the actual temp sensor range */
203 temp = cpu_temp_both(i);
204 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
205 temp & 0xff, temp >> 16);
208 #endif /* CONFIG_TAU */
210 if (ppc_md.show_percpuinfo != NULL) {
211 err = ppc_md.show_percpuinfo(m, i);
216 /* If we are a Freescale core do a simple check so
217 * we dont have to keep adding cases in the future */
218 if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
222 switch (PVR_VER(pvr)) {
223 case 0x0020: /* 403 family */
224 maj = PVR_MAJ(pvr) + 1;
227 case 0x1008: /* 740P/750P ?? */
228 maj = ((pvr >> 8) & 0xFF) - 1;
232 maj = (pvr >> 8) & 0xFF;
238 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
239 maj, min, PVR_VER(pvr), PVR_REV(pvr));
241 seq_printf(m, "bogomips\t: %lu.%02lu\n",
242 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
244 #if defined(CONFIG_85xx) || defined(CONFIG_83xx) || defined(CONFIG_MPC10X_BRIDGE)
245 if (cur_ppc_sys_spec->ppc_sys_name)
246 seq_printf(m, "chipset\t\t: %s\n",
247 cur_ppc_sys_spec->ppc_sys_name);
257 static void *c_start(struct seq_file *m, loff_t *pos)
261 return i <= NR_CPUS? (void *) (i + 1): NULL;
264 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
267 return c_start(m, pos);
270 static void c_stop(struct seq_file *m, void *v)
274 struct seq_operations cpuinfo_op = {
278 .show = show_cpuinfo,
282 * We're called here very early in the boot. We determine the machine
283 * type and call the appropriate low-level setup functions.
284 * -- Cort <cort@fsmlabs.com>
286 * Note that the kernel may be running at an address which is different
287 * from the address that it was linked at, so we must use RELOC/PTRRELOC
288 * to access static data (including strings). -- paulus
292 early_init(int r3, int r4, int r5)
295 unsigned long offset = reloc_offset();
298 phys = offset + KERNELBASE;
300 /* First zero the BSS -- use memset, some arches don't have
302 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
305 * Identify the CPU type and fix up code sections
306 * that depend on which cpu we have.
308 identify_cpu(offset, 0);
309 do_cpu_ftr_fixups(offset);
311 #if defined(CONFIG_PPC_MULTIPLATFORM)
314 /* If we came here from BootX, clear the screen,
315 * set up some pointers and return. */
316 if ((r3 == 0x426f6f58) && (r5 == 0))
317 bootx_init(r4, phys);
320 * don't do anything on prep
321 * for now, don't use bootinfo because it breaks yaboot 0.5
322 * and assume that if we didn't find a magic number, we have OF
324 else if (*(unsigned long *)(0) != 0xdeadc0de)
325 phys = prom_init(r3, r4, (prom_entry)r5);
335 * Assume here that all clock rates are the same in a
336 * smp system. -- Cort
339 of_show_percpuinfo(struct seq_file *m, int i)
341 struct device_node *cpu_node;
345 cpu_node = find_type_devices("cpu");
348 for (s = 0; s < i && cpu_node->next; s++)
349 cpu_node = cpu_node->next;
350 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
352 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
357 intuit_machine_type(void)
360 struct device_node *root;
362 /* ask the OF info if we're a chrp or pmac */
363 root = find_path_device("/");
365 /* assume pmac unless proven to be chrp -- Cort */
366 _machine = _MACH_Pmac;
367 model = get_property(root, "device_type", NULL);
368 if (model && !strncmp("chrp", model, 4))
369 _machine = _MACH_chrp;
371 model = get_property(root, "model", NULL);
372 if (model && !strncmp(model, "IBM", 3))
373 _machine = _MACH_chrp;
379 #ifdef CONFIG_PPC_MULTIPLATFORM
381 * The PPC_MULTIPLATFORM version of platform_init...
384 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
385 unsigned long r6, unsigned long r7)
387 #ifdef CONFIG_BOOTX_TEXT
388 if (boot_text_mapped) {
394 parse_bootinfo(find_bootinfo());
396 /* if we didn't get any bootinfo telling us what we are... */
398 /* prep boot loader tells us if we're prep or not */
399 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
400 _machine = _MACH_prep;
403 /* not much more to do here, if prep */
404 if (_machine == _MACH_prep) {
405 prep_init(r3, r4, r5, r6, r7);
409 /* prom_init has already been called from __start */
413 /* If we aren't PReP, we can find out if we're Pmac
414 * or CHRP with this. */
416 intuit_machine_type();
418 /* finish_device_tree may need _machine defined. */
419 finish_device_tree();
422 * If we were booted via quik, r3 points to the physical
423 * address of the command-line parameters.
424 * If we were booted from an xcoff image (i.e. netbooted or
425 * booted from floppy), we get the command line from the
426 * bootargs property of the /chosen node.
427 * If an initial ramdisk is present, r3 and r4
428 * are used for initrd_start and initrd_size,
429 * otherwise they contain 0xdeadbeef.
431 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
432 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
434 } else if (boot_infos != 0) {
435 /* booted by BootX - check for ramdisk */
436 if (boot_infos->kernelParamsOffset != 0)
437 strlcpy(cmd_line, (char *) boot_infos
438 + boot_infos->kernelParamsOffset,
440 #ifdef CONFIG_BLK_DEV_INITRD
441 if (boot_infos->ramDisk) {
442 initrd_start = (unsigned long) boot_infos
443 + boot_infos->ramDisk;
444 initrd_end = initrd_start + boot_infos->ramDiskSize;
445 initrd_below_start_ok = 1;
449 struct device_node *chosen;
452 #ifdef CONFIG_BLK_DEV_INITRD
453 if (r3 && r4 && r4 != 0xdeadbeef) {
457 initrd_end = r3 + r4;
458 ROOT_DEV = Root_RAM0;
459 initrd_below_start_ok = 1;
462 chosen = find_devices("chosen");
463 if (chosen != NULL) {
464 p = get_property(chosen, "bootargs", NULL);
466 strlcpy(cmd_line, p, sizeof(cmd_line));
471 if (strstr(cmd_line, "adb_sync")) {
472 extern int __adb_probe_sync;
473 __adb_probe_sync = 1;
475 #endif /* CONFIG_ADB */
479 pmac_init(r3, r4, r5, r6, r7);
482 chrp_init(r3, r4, r5, r6, r7);
487 #ifdef CONFIG_SERIAL_CORE_CONSOLE
488 extern char *of_stdout_device;
490 static int __init set_preferred_console(void)
492 struct device_node *prom_stdout;
496 if (of_stdout_device == NULL)
499 /* The user has requested a console so this is already set up. */
500 if (strstr(saved_command_line, "console="))
503 prom_stdout = find_path_device(of_stdout_device);
507 name = (char *)get_property(prom_stdout, "name", NULL);
511 if (strcmp(name, "serial") == 0) {
513 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
529 /* We dont recognise the serial port */
533 } else if (strcmp(name, "ch-a") == 0)
535 else if (strcmp(name, "ch-b") == 0)
539 return add_preferred_console("ttyS", offset, NULL);
541 console_initcall(set_preferred_console);
542 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
543 #endif /* CONFIG_PPC_MULTIPLATFORM */
545 struct bi_record *find_bootinfo(void)
547 struct bi_record *rec;
549 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
550 if ( rec->tag != BI_FIRST ) {
552 * This 0x10000 offset is a terrible hack but it will go away when
553 * we have the bootloader handle all the relocation and
556 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
557 if ( rec->tag != BI_FIRST )
563 void parse_bootinfo(struct bi_record *rec)
565 if (rec == NULL || rec->tag != BI_FIRST)
567 while (rec->tag != BI_LAST) {
568 ulong *data = rec->data;
571 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
573 #ifdef CONFIG_BLK_DEV_INITRD
575 initrd_start = data[0] + KERNELBASE;
576 initrd_end = data[0] + data[1] + KERNELBASE;
578 #endif /* CONFIG_BLK_DEV_INITRD */
579 #ifdef CONFIG_PPC_MULTIPLATFORM
585 boot_mem_size = data[0];
588 rec = (struct bi_record *)((ulong)rec + rec->size);
593 * Find out what kind of machine we're on and save any data we need
594 * from the early boot process (devtree is copied on pmac by prom_init()).
595 * This is called very early on the boot process, after a minimal
596 * MMU environment has been set up but before MMU_init is called.
599 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
600 unsigned long r6, unsigned long r7)
602 #ifdef CONFIG_CMDLINE
603 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
604 #endif /* CONFIG_CMDLINE */
607 ppc_md.power_save = ppc6xx_idle;
610 ppc_md.power_save = power4_idle;
613 platform_init(r3, r4, r5, r6, r7);
616 ppc_md.progress("id mach(): done", 0x200);
619 /* Checks "l2cr=xxxx" command-line option */
620 int __init ppc_setup_l2cr(char *str)
622 if (cpu_has_feature(CPU_FTR_L2CR)) {
623 unsigned long val = simple_strtoul(str, NULL, 0);
624 printk(KERN_INFO "l2cr set to %lx\n", val);
625 _set_L2CR(0); /* force invalidate by disable cache */
626 _set_L2CR(val); /* and enable it */
630 __setup("l2cr=", ppc_setup_l2cr);
632 #ifdef CONFIG_GENERIC_NVRAM
634 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
635 unsigned char nvram_read_byte(int addr)
637 if (ppc_md.nvram_read_val)
638 return ppc_md.nvram_read_val(addr);
641 EXPORT_SYMBOL(nvram_read_byte);
643 void nvram_write_byte(unsigned char val, int addr)
645 if (ppc_md.nvram_write_val)
646 ppc_md.nvram_write_val(addr, val);
648 EXPORT_SYMBOL(nvram_write_byte);
650 void nvram_sync(void)
652 if (ppc_md.nvram_sync)
655 EXPORT_SYMBOL(nvram_sync);
657 #endif /* CONFIG_NVRAM */
659 static struct cpu cpu_devices[NR_CPUS];
661 int __init ppc_init(void)
665 /* clear the progress line */
666 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
668 /* register CPU devices */
669 for (i = 0; i < NR_CPUS; i++)
671 register_cpu(&cpu_devices[i], i, NULL);
673 /* call platform init */
674 if (ppc_md.init != NULL) {
680 arch_initcall(ppc_init);
682 /* Warning, IO base is not yet inited */
683 void __init setup_arch(char **cmdline_p)
686 extern void do_init_bootmem(void);
688 /* so udelay does something sensible, assume <= 1000 bogomips */
689 loops_per_jiffy = 500000000 / HZ;
691 #ifdef CONFIG_PPC_MULTIPLATFORM
692 /* This could be called "early setup arch", it must be done
693 * now because xmon need it
695 if (_machine == _MACH_Pmac)
696 pmac_feature_init(); /* New cool way */
701 if (strstr(cmd_line, "xmon"))
703 #endif /* CONFIG_XMON */
704 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
706 #if defined(CONFIG_KGDB)
707 if (ppc_md.kgdb_map_scc)
708 ppc_md.kgdb_map_scc();
710 if (strstr(cmd_line, "gdb")) {
712 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
713 printk("kgdb breakpoint activated\n");
719 * Set cache line size based on type of cpu as a default.
720 * Systems with OF can look in the properties on the cpu node(s)
721 * for a possibly more accurate value.
723 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
724 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
725 icache_bsize = cur_cpu_spec[0]->icache_bsize;
728 ucache_bsize = dcache_bsize = icache_bsize
729 = cur_cpu_spec[0]->dcache_bsize;
731 /* reboot on panic */
734 init_mm.start_code = PAGE_OFFSET;
735 init_mm.end_code = (unsigned long) _etext;
736 init_mm.end_data = (unsigned long) _edata;
737 init_mm.brk = (unsigned long) klimit;
739 /* Save unparsed command line copy for /proc/cmdline */
740 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
741 *cmdline_p = cmd_line;
745 /* set up the bootmem stuff with available memory */
747 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
749 #ifdef CONFIG_PPC_OCP
750 /* Initialize OCP device list */
752 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
755 #ifdef CONFIG_DUMMY_CONSOLE
756 conswitchp = &dummy_con;
760 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
764 /* this is for modules since _machine can be a define -- Cort */
765 ppc_md.ppc_machine = _machine;