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>
19 #include <asm/residual.h>
22 #include <asm/processor.h>
23 #include <asm/pgtable.h>
24 #include <asm/bootinfo.h>
25 #include <asm/setup.h>
26 #include <asm/amigappc.h>
29 #include <asm/cputable.h>
30 #include <asm/bootx.h>
31 #include <asm/btext.h>
32 #include <asm/machdep.h>
33 #include <asm/uaccess.h>
34 #include <asm/system.h>
35 #include <asm/pmac_feature.h>
36 #include <asm/sections.h>
39 #if defined CONFIG_KGDB
43 extern void platform_init(unsigned long r3, unsigned long r4,
44 unsigned long r5, unsigned long r6, unsigned long r7);
45 extern void bootx_init(unsigned long r4, unsigned long phys);
46 extern void identify_cpu(unsigned long offset, unsigned long cpu);
47 extern void do_cpu_ftr_fixups(unsigned long offset);
48 extern void reloc_got2(unsigned long offset);
52 extern void kgdb_map_scc(void);
55 extern void ppc6xx_idle(void);
57 extern boot_infos_t *boot_infos;
58 char saved_command_line[256];
59 unsigned char aux_device_present;
60 struct ide_machdep_calls ppc_ide_md;
62 unsigned long sysmap_size;
64 /* Used with the BI_MEMSIZE bootinfo parameter to store the memory
65 size value reported by the boot loader. */
66 unsigned long boot_mem_size;
68 unsigned long ISA_DMA_THRESHOLD;
69 unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
71 #ifdef CONFIG_PPC_MULTIPLATFORM
74 extern void prep_init(unsigned long r3, unsigned long r4,
75 unsigned long r5, unsigned long r6, unsigned long r7);
76 extern void pmac_init(unsigned long r3, unsigned long r4,
77 unsigned long r5, unsigned long r6, unsigned long r7);
78 extern void chrp_init(unsigned long r3, unsigned long r4,
79 unsigned long r5, unsigned long r6, unsigned long r7);
80 #endif /* CONFIG_PPC_MULTIPLATFORM */
82 #ifdef CONFIG_MAGIC_SYSRQ
83 unsigned long SYSRQ_KEY = 0x54;
84 #endif /* CONFIG_MAGIC_SYSRQ */
86 #ifdef CONFIG_VGA_CONSOLE
87 unsigned long vgacon_remap_base;
90 struct machdep_calls ppc_md;
93 * These are used in binfmt_elf.c to put aux entries on the stack
94 * for each elf executable being started.
100 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
101 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
102 struct screen_info screen_info = {
103 0, 25, /* orig-x, orig-y */
105 0, /* orig-video-page */
106 0, /* orig-video-mode */
107 80, /* orig-video-cols */
108 0,0,0, /* ega_ax, ega_bx, ega_cx */
109 25, /* orig-video-lines */
110 1, /* orig-video-isVGA */
111 16 /* orig-video-points */
113 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
115 void machine_restart(char *cmd)
120 void machine_power_off(void)
125 void machine_halt(void)
130 void (*pm_power_off)(void) = machine_power_off;
133 extern u32 cpu_temp(unsigned long cpu);
134 extern u32 cpu_temp_both(unsigned long cpu);
135 #endif /* CONFIG_TAU */
137 int show_cpuinfo(struct seq_file *m, void *v)
142 unsigned short maj, min;
146 /* Show summary information */
148 unsigned long bogosum = 0;
149 for (i = 0; i < NR_CPUS; ++i)
151 bogosum += cpu_data[i].loops_per_jiffy;
152 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
153 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
154 #endif /* CONFIG_SMP */
156 if (ppc_md.show_cpuinfo != NULL)
157 err = ppc_md.show_cpuinfo(m);
162 if (!(cpu_online_map & (1 << i)))
164 pvr = cpu_data[i].pvr;
165 lpj = cpu_data[i].loops_per_jiffy;
166 seq_printf(m, "processor\t: %d\n", i);
169 lpj = loops_per_jiffy;
172 seq_printf(m, "cpu\t\t: ");
174 if (cur_cpu_spec[i]->pvr_mask)
175 seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
177 seq_printf(m, "unknown (%08x)", pvr);
178 #ifdef CONFIG_ALTIVEC
179 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
180 seq_printf(m, ", altivec supported");
185 if (cur_cpu_spec[i]->cpu_features & CPU_FTR_TAU) {
186 #ifdef CONFIG_TAU_AVERAGE
187 /* more straightforward, but potentially misleading */
188 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
191 /* show the actual temp sensor range */
193 temp = cpu_temp_both(i);
194 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
195 temp & 0xff, temp >> 16);
198 #endif /* CONFIG_TAU */
200 if (ppc_md.show_percpuinfo != NULL) {
201 err = ppc_md.show_percpuinfo(m, i);
206 switch (PVR_VER(pvr)) {
207 case 0x0020: /* 403 family */
208 maj = PVR_MAJ(pvr) + 1;
211 case 0x1008: /* 740P/750P ?? */
212 maj = ((pvr >> 8) & 0xFF) - 1;
216 maj = (pvr >> 8) & 0xFF;
221 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
222 maj, min, PVR_VER(pvr), PVR_REV(pvr));
224 seq_printf(m, "bogomips\t: %lu.%02lu\n",
225 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
234 static void *c_start(struct seq_file *m, loff_t *pos)
238 return i <= NR_CPUS? (void *) (i + 1): NULL;
241 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
244 return c_start(m, pos);
247 static void c_stop(struct seq_file *m, void *v)
251 struct seq_operations cpuinfo_op = {
255 .show = show_cpuinfo,
259 * We're called here very early in the boot. We determine the machine
260 * type and call the appropriate low-level setup functions.
261 * -- Cort <cort@fsmlabs.com>
263 * Note that the kernel may be running at an address which is different
264 * from the address that it was linked at, so we must use RELOC/PTRRELOC
265 * to access static data (including strings). -- paulus
269 early_init(int r3, int r4, int r5)
272 unsigned long offset = reloc_offset();
275 phys = offset + KERNELBASE;
277 /* First zero the BSS -- use memset, some arches don't have
279 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
282 * Identify the CPU type and fix up code sections
283 * that depend on which cpu we have.
285 identify_cpu(offset, 0);
286 do_cpu_ftr_fixups(offset);
288 #if defined(CONFIG_PPC_MULTIPLATFORM)
291 /* If we came here from BootX, clear the screen,
292 * set up some pointers and return. */
293 if ((r3 == 0x426f6f58) && (r5 == 0))
294 bootx_init(r4, phys);
297 * don't do anything on prep
298 * for now, don't use bootinfo because it breaks yaboot 0.5
299 * and assume that if we didn't find a magic number, we have OF
301 else if (*(unsigned long *)(0) != 0xdeadc0de)
302 phys = prom_init(r3, r4, (prom_entry)r5);
312 * Assume here that all clock rates are the same in a
313 * smp system. -- Cort
316 of_show_percpuinfo(struct seq_file *m, int i)
318 struct device_node *cpu_node;
321 cpu_node = find_type_devices("cpu");
324 for (s = 0; s < i && cpu_node->next; s++)
325 cpu_node = cpu_node->next;
326 fp = (int *) get_property(cpu_node, "clock-frequency", NULL);
328 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
333 intuit_machine_type(void)
336 struct device_node *root;
338 /* ask the OF info if we're a chrp or pmac */
339 root = find_path_device("/");
341 /* assume pmac unless proven to be chrp -- Cort */
342 _machine = _MACH_Pmac;
343 model = get_property(root, "device_type", NULL);
344 if (model && !strncmp("chrp", model, 4))
345 _machine = _MACH_chrp;
347 model = get_property(root, "model", NULL);
348 if (model && !strncmp(model, "IBM", 3))
349 _machine = _MACH_chrp;
355 #ifdef CONFIG_PPC_MULTIPLATFORM
357 * The PPC_MULTIPLATFORM version of platform_init...
360 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
361 unsigned long r6, unsigned long r7)
363 #ifdef CONFIG_BOOTX_TEXT
364 if (boot_text_mapped) {
370 parse_bootinfo(find_bootinfo());
372 /* if we didn't get any bootinfo telling us what we are... */
374 /* prep boot loader tells us if we're prep or not */
375 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
376 _machine = _MACH_prep;
379 /* not much more to do here, if prep */
380 if (_machine == _MACH_prep) {
381 prep_init(r3, r4, r5, r6, r7);
385 /* prom_init has already been called from __start */
389 /* If we aren't PReP, we can find out if we're Pmac
390 * or CHRP with this. */
392 intuit_machine_type();
394 /* finish_device_tree may need _machine defined. */
395 finish_device_tree();
398 * If we were booted via quik, r3 points to the physical
399 * address of the command-line parameters.
400 * If we were booted from an xcoff image (i.e. netbooted or
401 * booted from floppy), we get the command line from the
402 * bootargs property of the /chosen node.
403 * If an initial ramdisk is present, r3 and r4
404 * are used for initrd_start and initrd_size,
405 * otherwise they contain 0xdeadbeef.
408 if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
409 strlcpy(cmd_line, (char *)r3 + KERNELBASE,
411 } else if (boot_infos != 0) {
412 /* booted by BootX - check for ramdisk */
413 if (boot_infos->kernelParamsOffset != 0)
414 strlcpy(cmd_line, (char *) boot_infos
415 + boot_infos->kernelParamsOffset,
417 #ifdef CONFIG_BLK_DEV_INITRD
418 if (boot_infos->ramDisk) {
419 initrd_start = (unsigned long) boot_infos
420 + boot_infos->ramDisk;
421 initrd_end = initrd_start + boot_infos->ramDiskSize;
422 initrd_below_start_ok = 1;
426 struct device_node *chosen;
429 #ifdef CONFIG_BLK_DEV_INITRD
430 if (r3 && r4 && r4 != 0xdeadbeef) {
434 initrd_end = r3 + r4;
435 ROOT_DEV = Root_RAM0;
436 initrd_below_start_ok = 1;
439 chosen = find_devices("chosen");
440 if (chosen != NULL) {
441 p = get_property(chosen, "bootargs", NULL);
443 strlcpy(cmd_line, p, sizeof(cmd_line));
448 if (strstr(cmd_line, "adb_sync")) {
449 extern int __adb_probe_sync;
450 __adb_probe_sync = 1;
452 #endif /* CONFIG_ADB */
456 pmac_init(r3, r4, r5, r6, r7);
459 chrp_init(r3, r4, r5, r6, r7);
463 #endif /* CONFIG_PPC_MULTIPLATFORM */
465 struct bi_record *find_bootinfo(void)
467 struct bi_record *rec;
469 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
470 if ( rec->tag != BI_FIRST ) {
472 * This 0x10000 offset is a terrible hack but it will go away when
473 * we have the bootloader handle all the relocation and
476 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
477 if ( rec->tag != BI_FIRST )
483 void parse_bootinfo(struct bi_record *rec)
485 if (rec == NULL || rec->tag != BI_FIRST)
487 while (rec->tag != BI_LAST) {
488 ulong *data = rec->data;
491 memcpy(cmd_line, (void *)data, rec->size);
494 sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
495 (data[0]+KERNELBASE));
496 sysmap_size = data[1];
498 #ifdef CONFIG_BLK_DEV_INITRD
500 initrd_start = data[0] + KERNELBASE;
501 initrd_end = data[0] + data[1] + KERNELBASE;
503 #endif /* CONFIG_BLK_DEV_INITRD */
504 #ifdef CONFIG_PPC_MULTIPLATFORM
510 boot_mem_size = data[0];
513 rec = (struct bi_record *)((ulong)rec + rec->size);
518 * Find out what kind of machine we're on and save any data we need
519 * from the early boot process (devtree is copied on pmac by prom_init()).
520 * This is called very early on the boot process, after a minimal
521 * MMU environment has been set up but before MMU_init is called.
524 machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
525 unsigned long r6, unsigned long r7)
527 #ifdef CONFIG_CMDLINE
528 strcpy(cmd_line, CONFIG_CMDLINE);
529 #endif /* CONFIG_CMDLINE */
531 #if defined(CONFIG_6xx)
532 ppc_md.power_save = ppc6xx_idle;
535 platform_init(r3, r4, r5, r6, r7);
538 ppc_md.progress("id mach(): done", 0x200);
541 /* Checks "l2cr=xxxx" command-line option */
542 int __init ppc_setup_l2cr(char *str)
544 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_L2CR) {
545 unsigned long val = simple_strtoul(str, NULL, 0);
546 printk(KERN_INFO "l2cr set to %lx\n", val);
547 _set_L2CR(0); /* force invalidate by disable cache */
548 _set_L2CR(val); /* and enable it */
552 __setup("l2cr=", ppc_setup_l2cr);
555 /* Generic nvram hooks we now look into ppc_md.nvram_read_val
557 * //XX Those 2 could be moved to headers
560 nvram_read_byte(int addr)
562 if (ppc_md.nvram_read_val)
563 return ppc_md.nvram_read_val(addr);
568 nvram_write_byte(unsigned char val, int addr)
570 if (ppc_md.nvram_write_val)
571 ppc_md.nvram_write_val(val, addr);
573 #endif /* CONFIG_NVRAM */
575 int __init ppc_init(void)
577 /* clear the progress line */
578 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
580 if (ppc_md.init != NULL) {
586 arch_initcall(ppc_init);
588 /* Warning, IO base is not yet inited */
589 void __init setup_arch(char **cmdline_p)
591 extern int panic_timeout;
593 extern void do_init_bootmem(void);
595 /* so udelay does something sensible, assume <= 1000 bogomips */
596 loops_per_jiffy = 500000000 / HZ;
598 #ifdef CONFIG_PPC_MULTIPLATFORM
599 /* This could be called "early setup arch", it must be done
600 * now because xmon need it
602 if (_machine == _MACH_Pmac)
603 pmac_feature_init(); /* New cool way */
608 if (strstr(cmd_line, "xmon"))
610 #endif /* CONFIG_XMON */
611 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
613 #if defined(CONFIG_KGDB)
616 if (strstr(cmd_line, "nokgdb"))
617 printk("kgdb default breakpoint deactivated on command line\n");
620 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
621 printk("kgdb default breakpoint activated\n");
627 * Set cache line size based on type of cpu as a default.
628 * Systems with OF can look in the properties on the cpu node(s)
629 * for a possibly more accurate value.
631 if (cur_cpu_spec[0]->cpu_features & CPU_FTR_SPLIT_ID_CACHE) {
632 dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
633 icache_bsize = cur_cpu_spec[0]->icache_bsize;
636 ucache_bsize = dcache_bsize = icache_bsize
637 = cur_cpu_spec[0]->dcache_bsize;
639 /* reboot on panic */
642 init_mm.start_code = PAGE_OFFSET;
643 init_mm.end_code = (unsigned long) _etext;
644 init_mm.end_data = (unsigned long) _edata;
645 init_mm.brk = (unsigned long) klimit;
647 /* Save unparsed command line copy for /proc/cmdline */
648 strcpy(saved_command_line, cmd_line);
649 *cmdline_p = cmd_line;
651 /* set up the bootmem stuff with available memory */
653 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
656 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
659 sort_exception_table();
661 /* this is for modules since _machine can be a define -- Cort */
662 ppc_md.ppc_machine = _machine;