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/reboot.h>
11 #include <linux/delay.h>
12 #include <linux/initrd.h>
13 #include <linux/ide.h>
14 #include <linux/tty.h>
15 #include <linux/bootmem.h>
16 #include <linux/seq_file.h>
17 #include <linux/root_dev.h>
18 #include <linux/cpu.h>
19 #include <linux/console.h>
21 #include <asm/residual.h>
24 #include <asm/processor.h>
25 #include <asm/pgtable.h>
26 #include <asm/bootinfo.h>
27 #include <asm/setup.h>
28 #include <asm/amigappc.h>
31 #include <asm/cputable.h>
32 #include <asm/bootx.h>
33 #include <asm/btext.h>
34 #include <asm/machdep.h>
35 #include <asm/uaccess.h>
36 #include <asm/system.h>
37 #include <asm/pmac_feature.h>
38 #include <asm/sections.h>
39 #include <asm/nvram.h>
43 #if defined CONFIG_KGDB
47 extern void platform_init(unsigned long r3, unsigned long r4,
48 unsigned long r5, unsigned long r6, unsigned long r7);
49 extern void bootx_init(unsigned long r4, unsigned long phys);
50 extern void identify_cpu(unsigned long offset, unsigned long cpu);
51 extern void do_cpu_ftr_fixups(unsigned long offset);
52 extern void reloc_got2(unsigned long offset);
54 extern void ppc6xx_idle(void);
55 extern void power4_idle(void);
57 extern boot_infos_t *boot_infos;
58 unsigned char aux_device_present;
59 struct ide_machdep_calls ppc_ide_md;
61 unsigned long sysmap_size;
63 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
64 size value reported by the boot loader. */
65 unsigned long boot_mem_size;
67 unsigned long ISA_DMA_THRESHOLD;
68 unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
70 #ifdef CONFIG_PPC_MULTIPLATFORM
73 extern void prep_init(unsigned long r3, unsigned long r4,
74 unsigned long r5, unsigned long r6, unsigned long r7);
75 extern void pmac_init(unsigned long r3, unsigned long r4,
76 unsigned long r5, unsigned long r6, unsigned long r7);
77 extern void chrp_init(unsigned long r3, unsigned long r4,
78 unsigned long r5, unsigned long r6, unsigned long r7);
79 #endif /* CONFIG_PPC_MULTIPLATFORM */
81 #ifdef CONFIG_MAGIC_SYSRQ
82 unsigned long SYSRQ_KEY = 0x54;
83 #endif /* CONFIG_MAGIC_SYSRQ */
85 #ifdef CONFIG_VGA_CONSOLE
86 unsigned long vgacon_remap_base;
89 struct machdep_calls ppc_md;
92 * These are used in binfmt_elf.c to put aux entries on the stack
93 * for each elf executable being started.
99 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
100 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
101 struct screen_info screen_info = {
102 0, 25, /* orig-x, orig-y */
104 0, /* orig-video-page */
105 0, /* orig-video-mode */
106 80, /* orig-video-cols */
107 0,0,0, /* ega_ax, ega_bx, ega_cx */
108 25, /* orig-video-lines */
109 1, /* orig-video-isVGA */
110 16 /* orig-video-points */
112 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
114 void machine_restart(char *cmd)
122 EXPORT_SYMBOL(machine_restart);
124 void machine_power_off(void)
132 EXPORT_SYMBOL(machine_power_off);
134 void machine_halt(void)
142 EXPORT_SYMBOL(machine_halt);
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;
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 switch (PVR_VER(pvr)) {
221 case 0x0020: /* 403 family */
222 maj = PVR_MAJ(pvr) + 1;
225 case 0x1008: /* 740P/750P ?? */
226 maj = ((pvr >> 8) & 0xFF) - 1;
229 case 0x8020: /* e500 */
234 maj = (pvr >> 8) & 0xFF;
239 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
240 maj, min, PVR_VER(pvr), PVR_REV(pvr));
242 seq_printf(m, "bogomips\t: %lu.%02lu\n",
243 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
252 static void *c_start(struct seq_file *m, loff_t *pos)
256 return i <= NR_CPUS? (void *) (i + 1): NULL;
259 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
262 return c_start(m, pos);
265 static void c_stop(struct seq_file *m, void *v)
269 struct seq_operations cpuinfo_op = {
273 .show = show_cpuinfo,
277 * We're called here very early in the boot. We determine the machine
278 * type and call the appropriate low-level setup functions.
279 * -- Cort <cort@fsmlabs.com>
281 * Note that the kernel may be running at an address which is different
282 * from the address that it was linked at, so we must use RELOC/PTRRELOC
283 * to access static data (including strings). -- paulus
287 early_init(int r3, int r4, int r5)
290 unsigned long offset = reloc_offset();
293 phys = offset + KERNELBASE;
295 /* First zero the BSS -- use memset, some arches don't have
297 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
300 * Identify the CPU type and fix up code sections
301 * that depend on which cpu we have.
303 identify_cpu(offset, 0);
304 do_cpu_ftr_fixups(offset);
306 #if defined(CONFIG_PPC_MULTIPLATFORM)
309 /* If we came here from BootX, clear the screen,
310 * set up some pointers and return. */
311 if ((r3 == 0x426f6f58) && (r5 == 0))
312 bootx_init(r4, phys);
315 * don't do anything on prep
316 * for now, don't use bootinfo because it breaks yaboot 0.5
317 * and assume that if we didn't find a magic number, we have OF
319 else if (*(unsigned long *)(0) != 0xdeadc0de)
320 phys = prom_init(r3, r4, (prom_entry)r5);
330 * Assume here that all clock rates are the same in a
331 * smp system. -- Cort
334 of_show_percpuinfo(struct seq_file *m, int i)
336 struct device_node *cpu_node;
339 cpu_node = find_type_devices("cpu");
342 for (s = 0; s < i && cpu_node->next; s++)
343 cpu_node = cpu_node->next;
344 fp = (int *) get_property(cpu_node, "clock-frequency", NULL);
346 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
351 intuit_machine_type(void)
354 struct device_node *root;
356 /* ask the OF info if we're a chrp or pmac */
357 root = find_path_device("/");
359 /* assume pmac unless proven to be chrp -- Cort */
360 _machine = _MACH_Pmac;
361 model = get_property(root, "device_type", NULL);
362 if (model && !strncmp("chrp", model, 4))
363 _machine = _MACH_chrp;
365 model = get_property(root, "model", NULL);
366 if (model && !strncmp(model, "IBM", 3))
367 _machine = _MACH_chrp;
373 #ifdef CONFIG_PPC_MULTIPLATFORM
375 * The PPC_MULTIPLATFORM version of platform_init...
378 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
379 unsigned long r6, unsigned long r7)
381 #ifdef CONFIG_BOOTX_TEXT
382 if (boot_text_mapped) {
388 parse_bootinfo(find_bootinfo());
390 /* if we didn't get any bootinfo telling us what we are... */
392 /* prep boot loader tells us if we're prep or not */
393 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
394 _machine = _MACH_prep;
397 /* not much more to do here, if prep */
398 if (_machine == _MACH_prep) {
399 prep_init(r3, r4, r5, r6, r7);
403 /* prom_init has already been called from __start */
407 /* If we aren't PReP, we can find out if we're Pmac
408 * or CHRP with this. */
410 intuit_machine_type();
412 /* finish_device_tree may need _machine defined. */
413 finish_device_tree();
416 * If we were booted via quik, r3 points to the physical
417 * address of the command-line parameters.
418 * If we were booted from an xcoff image (i.e. netbooted or
419 * booted from floppy), we get the command line from the
420 * bootargs property of the /chosen node.
421 * If an initial ramdisk is present, r3 and r4
422 * are used for initrd_start and initrd_size,
423 * otherwise they contain 0xdeadbeef.
425 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
426 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
428 } else if (boot_infos != 0) {
429 /* booted by BootX - check for ramdisk */
430 if (boot_infos->kernelParamsOffset != 0)
431 strlcpy(cmd_line, (char *) boot_infos
432 + boot_infos->kernelParamsOffset,
434 #ifdef CONFIG_BLK_DEV_INITRD
435 if (boot_infos->ramDisk) {
436 initrd_start = (unsigned long) boot_infos
437 + boot_infos->ramDisk;
438 initrd_end = initrd_start + boot_infos->ramDiskSize;
439 initrd_below_start_ok = 1;
443 struct device_node *chosen;
446 #ifdef CONFIG_BLK_DEV_INITRD
447 if (r3 && r4 && r4 != 0xdeadbeef) {
451 initrd_end = r3 + r4;
452 ROOT_DEV = Root_RAM0;
453 initrd_below_start_ok = 1;
456 chosen = find_devices("chosen");
457 if (chosen != NULL) {
458 p = get_property(chosen, "bootargs", NULL);
460 strlcpy(cmd_line, p, sizeof(cmd_line));
465 if (strstr(cmd_line, "adb_sync")) {
466 extern int __adb_probe_sync;
467 __adb_probe_sync = 1;
469 #endif /* CONFIG_ADB */
473 pmac_init(r3, r4, r5, r6, r7);
476 chrp_init(r3, r4, r5, r6, r7);
481 #ifdef CONFIG_SERIAL_CORE_CONSOLE
482 extern char *of_stdout_device;
484 static int __init set_preferred_console(void)
486 struct device_node *prom_stdout;
490 if (of_stdout_device == NULL)
493 /* The user has requested a console so this is already set up. */
494 if (strstr(saved_command_line, "console="))
497 prom_stdout = find_path_device(of_stdout_device);
501 name = (char *)get_property(prom_stdout, "name", NULL);
505 if (strcmp(name, "serial") == 0) {
507 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
523 /* We dont recognise the serial port */
527 } else if (strcmp(name, "ch-a") == 0)
529 else if (strcmp(name, "ch-b") == 0)
533 return add_preferred_console("ttyS", offset, NULL);
535 console_initcall(set_preferred_console);
536 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
537 #endif /* CONFIG_PPC_MULTIPLATFORM */
539 struct bi_record *find_bootinfo(void)
541 struct bi_record *rec;
543 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
544 if ( rec->tag != BI_FIRST ) {
546 * This 0x10000 offset is a terrible hack but it will go away when
547 * we have the bootloader handle all the relocation and
550 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
551 if ( rec->tag != BI_FIRST )
557 void parse_bootinfo(struct bi_record *rec)
559 if (rec == NULL || rec->tag != BI_FIRST)
561 while (rec->tag != BI_LAST) {
562 ulong *data = rec->data;
565 strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
568 sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
569 (data[0]+KERNELBASE));
570 sysmap_size = data[1];
572 #ifdef CONFIG_BLK_DEV_INITRD
574 initrd_start = data[0] + KERNELBASE;
575 initrd_end = data[0] + data[1] + KERNELBASE;
577 #endif /* CONFIG_BLK_DEV_INITRD */
578 #ifdef CONFIG_PPC_MULTIPLATFORM
584 boot_mem_size = data[0];
587 rec = (struct bi_record *)((ulong)rec + rec->size);
592 * Find out what kind of machine we're on and save any data we need
593 * from the early boot process (devtree is copied on pmac by prom_init()).
594 * This is called very early on the boot process, after a minimal
595 * MMU environment has been set up but before MMU_init is called.
598 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
599 unsigned long r6, unsigned long r7)
601 #ifdef CONFIG_CMDLINE
602 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
603 #endif /* CONFIG_CMDLINE */
606 ppc_md.power_save = ppc6xx_idle;
609 ppc_md.power_save = power4_idle;
612 platform_init(r3, r4, r5, r6, r7);
615 ppc_md.progress("id mach(): done", 0x200);
618 /* Checks "l2cr=xxxx" command-line option */
619 int __init ppc_setup_l2cr(char *str)
621 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_L2CR) {
622 unsigned long val = simple_strtoul(str, NULL, 0);
623 printk(KERN_INFO "l2cr set to %lx\n", val);
624 _set_L2CR(0); /* force invalidate by disable cache */
625 _set_L2CR(val); /* and enable it */
629 __setup("l2cr=", ppc_setup_l2cr);
631 #ifdef CONFIG_GENERIC_NVRAM
633 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
634 unsigned char nvram_read_byte(int addr)
636 if (ppc_md.nvram_read_val)
637 return ppc_md.nvram_read_val(addr);
640 EXPORT_SYMBOL(nvram_read_byte);
642 void nvram_write_byte(unsigned char val, int addr)
644 if (ppc_md.nvram_write_val)
645 ppc_md.nvram_write_val(addr, val);
647 EXPORT_SYMBOL(nvram_write_byte);
649 void nvram_sync(void)
651 if (ppc_md.nvram_sync)
654 EXPORT_SYMBOL(nvram_sync);
656 #endif /* CONFIG_NVRAM */
658 static struct cpu cpu_devices[NR_CPUS];
660 int __init ppc_init(void)
664 /* clear the progress line */
665 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
667 /* register CPU devices */
668 for (i = 0; i < NR_CPUS; i++)
670 register_cpu(&cpu_devices[i], i, NULL);
672 /* call platform init */
673 if (ppc_md.init != NULL) {
679 arch_initcall(ppc_init);
681 /* Warning, IO base is not yet inited */
682 void __init setup_arch(char **cmdline_p)
684 extern int panic_timeout;
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 (cur_cpu_spec[0]->cpu_features & 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;
743 /* set up the bootmem stuff with available memory */
745 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
747 #ifdef CONFIG_PPC_OCP
748 /* Initialize OCP device list */
750 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
753 #ifdef CONFIG_DUMMY_CONSOLE
754 conswitchp = &dummy_con;
758 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
762 /* this is for modules since _machine can be a define -- Cort */
763 ppc_md.ppc_machine = _machine;