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(void);
57 extern void bootx_init(unsigned long r4, unsigned long phys);
59 extern void ppc6xx_idle(void);
60 extern void power4_idle(void);
62 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 int DMA_MODE_READ;
71 unsigned int DMA_MODE_WRITE;
73 #ifdef CONFIG_PPC_MULTIPLATFORM
76 extern void prep_init(void);
77 extern void pmac_init(void);
78 extern void chrp_init(void);
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->pvr_mask)
185 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
187 seq_printf(m, "unknown (%08x)", pvr);
188 #ifdef CONFIG_ALTIVEC
189 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
190 seq_printf(m, ", altivec supported");
195 if (cur_cpu_spec->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);
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
290 unsigned long __init early_init(unsigned long dt_ptr)
292 unsigned long offset = reloc_offset();
297 * Identify the CPU type and fix up code sections
298 * that depend on which cpu we have.
300 identify_cpu(offset, 0);
301 do_cpu_ftr_fixups(offset);
303 #ifdef CONFIG_BOOTX_TEXT
309 return KERNELBASE + offset;
314 * Assume here that all clock rates are the same in a
315 * smp system. -- Cort
318 of_show_percpuinfo(struct seq_file *m, int i)
320 struct device_node *cpu_node;
324 cpu_node = find_type_devices("cpu");
327 for (s = 0; s < i && cpu_node->next; s++)
328 cpu_node = cpu_node->next;
329 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
331 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
336 intuit_machine_type(void)
339 struct device_node *root;
341 /* ask the OF info if we're a chrp or pmac */
342 root = find_path_device("/");
344 /* assume pmac unless proven to be chrp -- Cort */
345 _machine = _MACH_Pmac;
346 model = get_property(root, "device_type", NULL);
347 if (model && !strncmp("chrp", model, 4))
348 _machine = _MACH_chrp;
350 model = get_property(root, "model", NULL);
351 if (model && !strncmp(model, "IBM", 3))
352 _machine = _MACH_chrp;
358 #ifdef CONFIG_PPC_MULTIPLATFORM
360 * The PPC_MULTIPLATFORM version of platform_init...
362 void __init platform_init(void)
364 /* if we didn't get any bootinfo telling us what we are... */
366 /* prep boot loader tells us if we're prep or not */
367 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
368 _machine = _MACH_prep;
371 #ifdef CONFIG_PPC_PREP
372 /* not much more to do here, if prep */
373 if (_machine == _MACH_prep) {
380 if (strstr(cmd_line, "adb_sync")) {
381 extern int __adb_probe_sync;
382 __adb_probe_sync = 1;
384 #endif /* CONFIG_ADB */
387 #ifdef CONFIG_PPC_PMAC
392 #ifdef CONFIG_PPC_CHRP
400 #ifdef CONFIG_SERIAL_CORE_CONSOLE
401 extern char *of_stdout_device;
403 static int __init set_preferred_console(void)
405 struct device_node *prom_stdout;
409 if (of_stdout_device == NULL)
412 /* The user has requested a console so this is already set up. */
413 if (strstr(saved_command_line, "console="))
416 prom_stdout = find_path_device(of_stdout_device);
420 name = (char *)get_property(prom_stdout, "name", NULL);
424 if (strcmp(name, "serial") == 0) {
426 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
442 /* We dont recognise the serial port */
446 } else if (strcmp(name, "ch-a") == 0)
448 else if (strcmp(name, "ch-b") == 0)
452 return add_preferred_console("ttyS", offset, NULL);
454 console_initcall(set_preferred_console);
455 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
456 #endif /* CONFIG_PPC_MULTIPLATFORM */
458 struct bi_record *find_bootinfo(void)
460 struct bi_record *rec;
462 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
463 if ( rec->tag != BI_FIRST ) {
465 * This 0x10000 offset is a terrible hack but it will go away when
466 * we have the bootloader handle all the relocation and
469 rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
470 if ( rec->tag != BI_FIRST )
477 * Find out what kind of machine we're on and save any data we need
478 * from the early boot process (devtree is copied on pmac by prom_init()).
479 * This is called very early on the boot process, after a minimal
480 * MMU environment has been set up but before MMU_init is called.
482 void __init machine_init(unsigned long dt_ptr, unsigned long phys)
484 early_init_devtree(__va(dt_ptr));
486 #ifdef CONFIG_CMDLINE
487 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
488 #endif /* CONFIG_CMDLINE */
491 ppc_md.power_save = ppc6xx_idle;
494 ppc_md.power_save = power4_idle;
500 ppc_md.progress("id mach(): done", 0x200);
503 #ifdef CONFIG_BOOKE_WDT
504 /* Checks wdt=x and wdt_period=xx command-line option */
505 int __init early_parse_wdt(char *p)
507 if (p && strncmp(p, "0", 1) != 0)
508 booke_wdt_enabled = 1;
512 early_param("wdt", early_parse_wdt);
514 int __init early_parse_wdt_period (char *p)
517 booke_wdt_period = simple_strtoul(p, NULL, 0);
521 early_param("wdt_period", early_parse_wdt_period);
522 #endif /* CONFIG_BOOKE_WDT */
524 /* Checks "l2cr=xxxx" command-line option */
525 int __init ppc_setup_l2cr(char *str)
527 if (cpu_has_feature(CPU_FTR_L2CR)) {
528 unsigned long val = simple_strtoul(str, NULL, 0);
529 printk(KERN_INFO "l2cr set to %lx\n", val);
530 _set_L2CR(0); /* force invalidate by disable cache */
531 _set_L2CR(val); /* and enable it */
535 __setup("l2cr=", ppc_setup_l2cr);
537 #ifdef CONFIG_GENERIC_NVRAM
539 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
540 unsigned char nvram_read_byte(int addr)
542 if (ppc_md.nvram_read_val)
543 return ppc_md.nvram_read_val(addr);
546 EXPORT_SYMBOL(nvram_read_byte);
548 void nvram_write_byte(unsigned char val, int addr)
550 if (ppc_md.nvram_write_val)
551 ppc_md.nvram_write_val(addr, val);
553 EXPORT_SYMBOL(nvram_write_byte);
555 void nvram_sync(void)
557 if (ppc_md.nvram_sync)
560 EXPORT_SYMBOL(nvram_sync);
562 #endif /* CONFIG_NVRAM */
564 static struct cpu cpu_devices[NR_CPUS];
566 int __init ppc_init(void)
570 /* clear the progress line */
571 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
573 /* register CPU devices */
574 for (i = 0; i < NR_CPUS; i++)
576 register_cpu(&cpu_devices[i], i, NULL);
578 /* call platform init */
579 if (ppc_md.init != NULL) {
585 arch_initcall(ppc_init);
587 /* Warning, IO base is not yet inited */
588 void __init setup_arch(char **cmdline_p)
591 extern void do_init_bootmem(void);
593 /* so udelay does something sensible, assume <= 1000 bogomips */
594 loops_per_jiffy = 500000000 / HZ;
596 #ifdef CONFIG_BOOTX_TEXT
600 unflatten_device_tree();
601 finish_device_tree();
603 #ifdef CONFIG_PPC_MULTIPLATFORM
604 /* This could be called "early setup arch", it must be done
605 * now because xmon need it
607 if (_machine == _MACH_Pmac)
608 pmac_feature_init(); /* New cool way */
613 if (strstr(cmd_line, "xmon"))
615 #endif /* CONFIG_XMON */
616 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
618 #if defined(CONFIG_KGDB)
619 if (ppc_md.kgdb_map_scc)
620 ppc_md.kgdb_map_scc();
622 if (strstr(cmd_line, "gdb")) {
624 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
625 printk("kgdb breakpoint activated\n");
631 * Set cache line size based on type of cpu as a default.
632 * Systems with OF can look in the properties on the cpu node(s)
633 * for a possibly more accurate value.
635 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
636 dcache_bsize = cur_cpu_spec->dcache_bsize;
637 icache_bsize = cur_cpu_spec->icache_bsize;
640 ucache_bsize = dcache_bsize = icache_bsize
641 = cur_cpu_spec->dcache_bsize;
643 /* reboot on panic */
646 init_mm.start_code = PAGE_OFFSET;
647 init_mm.end_code = (unsigned long) _etext;
648 init_mm.end_data = (unsigned long) _edata;
649 init_mm.brk = (unsigned long) klimit;
651 /* Save unparsed command line copy for /proc/cmdline */
652 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
653 *cmdline_p = cmd_line;
657 /* set up the bootmem stuff with available memory */
659 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
661 #ifdef CONFIG_PPC_OCP
662 /* Initialize OCP device list */
664 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
667 #ifdef CONFIG_DUMMY_CONSOLE
668 conswitchp = &dummy_con;
672 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
676 /* this is for modules since _machine can be a define -- Cort */
677 ppc_md.ppc_machine = _machine;