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;
75 #ifdef CONFIG_PPC_MULTIPLATFORM
78 extern void prep_init(void);
79 extern void pmac_init(void);
80 extern void chrp_init(void);
83 #endif /* CONFIG_PPC_MULTIPLATFORM */
85 #ifdef CONFIG_MAGIC_SYSRQ
86 unsigned long SYSRQ_KEY = 0x54;
87 #endif /* CONFIG_MAGIC_SYSRQ */
89 #ifdef CONFIG_VGA_CONSOLE
90 unsigned long vgacon_remap_base;
93 struct machdep_calls ppc_md;
94 EXPORT_SYMBOL(ppc_md);
97 * These are used in binfmt_elf.c to put aux entries on the stack
98 * for each elf executable being started.
104 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
105 defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
106 struct screen_info screen_info = {
107 0, 25, /* orig-x, orig-y */
109 0, /* orig-video-page */
110 0, /* orig-video-mode */
111 80, /* orig-video-cols */
112 0,0,0, /* ega_ax, ega_bx, ega_cx */
113 25, /* orig-video-lines */
114 1, /* orig-video-isVGA */
115 16 /* orig-video-points */
117 #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
119 void machine_restart(char *cmd)
127 void machine_power_off(void)
135 void machine_halt(void)
143 void (*pm_power_off)(void) = machine_power_off;
146 extern u32 cpu_temp(unsigned long cpu);
147 extern u32 cpu_temp_both(unsigned long cpu);
148 #endif /* CONFIG_TAU */
150 int show_cpuinfo(struct seq_file *m, void *v)
154 unsigned short maj, min;
158 /* Show summary information */
160 unsigned long bogosum = 0;
161 for (i = 0; i < NR_CPUS; ++i)
163 bogosum += cpu_data[i].loops_per_jiffy;
164 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
165 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
166 #endif /* CONFIG_SMP */
168 if (ppc_md.show_cpuinfo != NULL)
169 ppc_md.show_cpuinfo(m);
176 pvr = cpu_data[i].pvr;
177 lpj = cpu_data[i].loops_per_jiffy;
179 pvr = mfspr(SPRN_PVR);
180 lpj = loops_per_jiffy;
183 seq_printf(m, "processor\t: %d\n", i);
184 seq_printf(m, "cpu\t\t: ");
186 if (cur_cpu_spec->pvr_mask)
187 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
189 seq_printf(m, "unknown (%08x)", pvr);
190 #ifdef CONFIG_ALTIVEC
191 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
192 seq_printf(m, ", altivec supported");
197 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
198 #ifdef CONFIG_TAU_AVERAGE
199 /* more straightforward, but potentially misleading */
200 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
203 /* show the actual temp sensor range */
205 temp = cpu_temp_both(i);
206 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
207 temp & 0xff, temp >> 16);
210 #endif /* CONFIG_TAU */
212 if (ppc_md.show_percpuinfo != NULL)
213 ppc_md.show_percpuinfo(m, i);
215 /* If we are a Freescale core do a simple check so
216 * we dont have to keep adding cases in the future */
217 if (PVR_VER(pvr) & 0x8000) {
221 switch (PVR_VER(pvr)) {
222 case 0x0020: /* 403 family */
223 maj = PVR_MAJ(pvr) + 1;
226 case 0x1008: /* 740P/750P ?? */
227 maj = ((pvr >> 8) & 0xFF) - 1;
231 maj = (pvr >> 8) & 0xFF;
237 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
238 maj, min, PVR_VER(pvr), PVR_REV(pvr));
240 seq_printf(m, "bogomips\t: %lu.%02lu\n",
241 lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
244 if (cur_ppc_sys_spec->ppc_sys_name)
245 seq_printf(m, "chipset\t\t: %s\n",
246 cur_ppc_sys_spec->ppc_sys_name);
256 static void *c_start(struct seq_file *m, loff_t *pos)
260 return i <= NR_CPUS? (void *) (i + 1): NULL;
263 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
266 return c_start(m, pos);
269 static void c_stop(struct seq_file *m, void *v)
273 struct seq_operations cpuinfo_op = {
277 .show = show_cpuinfo,
281 * We're called here very early in the boot. We determine the machine
282 * type and call the appropriate low-level setup functions.
283 * -- Cort <cort@fsmlabs.com>
285 * Note that the kernel may be running at an address which is different
286 * from the address that it was linked at, so we must use RELOC/PTRRELOC
287 * to access static data (including strings). -- paulus
289 unsigned long __init early_init(unsigned long dt_ptr)
291 unsigned long offset = reloc_offset();
293 /* First zero the BSS -- use memset_io, some platforms don't have
295 memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
298 * Identify the CPU type and fix up code sections
299 * that depend on which cpu we have.
301 identify_cpu(offset, 0);
302 do_cpu_ftr_fixups(offset);
304 return KERNELBASE + offset;
309 * Assume here that all clock rates are the same in a
310 * smp system. -- Cort
313 of_show_percpuinfo(struct seq_file *m, int i)
315 struct device_node *cpu_node;
319 cpu_node = find_type_devices("cpu");
322 for (s = 0; s < i && cpu_node->next; s++)
323 cpu_node = cpu_node->next;
324 fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
326 seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
331 intuit_machine_type(void)
334 struct device_node *root;
336 /* ask the OF info if we're a chrp or pmac */
337 root = find_path_device("/");
339 /* assume pmac unless proven to be chrp -- Cort */
340 _machine = _MACH_Pmac;
341 model = get_property(root, "device_type", NULL);
342 if (model && !strncmp("chrp", model, 4))
343 _machine = _MACH_chrp;
345 model = get_property(root, "model", NULL);
346 if (model && !strncmp(model, "IBM", 3))
347 _machine = _MACH_chrp;
353 #ifdef CONFIG_PPC_MULTIPLATFORM
355 * The PPC_MULTIPLATFORM version of platform_init...
357 void __init platform_init(void)
359 /* if we didn't get any bootinfo telling us what we are... */
361 /* prep boot loader tells us if we're prep or not */
362 if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
363 _machine = _MACH_prep;
366 #ifdef CONFIG_PPC_PREP
367 /* not much more to do here, if prep */
368 if (_machine == _MACH_prep) {
375 if (strstr(cmd_line, "adb_sync")) {
376 extern int __adb_probe_sync;
377 __adb_probe_sync = 1;
379 #endif /* CONFIG_ADB */
382 #ifdef CONFIG_PPC_PMAC
387 #ifdef CONFIG_PPC_CHRP
395 #ifdef CONFIG_SERIAL_CORE_CONSOLE
396 extern char *of_stdout_device;
398 static int __init set_preferred_console(void)
400 struct device_node *prom_stdout;
404 if (of_stdout_device == NULL)
407 /* The user has requested a console so this is already set up. */
408 if (strstr(saved_command_line, "console="))
411 prom_stdout = find_path_device(of_stdout_device);
415 name = (char *)get_property(prom_stdout, "name", NULL);
419 if (strcmp(name, "serial") == 0) {
421 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
437 /* We dont recognise the serial port */
441 } else if (strcmp(name, "ch-a") == 0)
443 else if (strcmp(name, "ch-b") == 0)
447 return add_preferred_console("ttyS", offset, NULL);
449 console_initcall(set_preferred_console);
450 #endif /* CONFIG_SERIAL_CORE_CONSOLE */
451 #endif /* CONFIG_PPC_MULTIPLATFORM */
454 * Find out what kind of machine we're on and save any data we need
455 * from the early boot process (devtree is copied on pmac by prom_init()).
456 * This is called very early on the boot process, after a minimal
457 * MMU environment has been set up but before MMU_init is called.
459 void __init machine_init(unsigned long dt_ptr, unsigned long phys)
461 early_init_devtree(__va(dt_ptr));
463 #ifdef CONFIG_CMDLINE
464 strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
465 #endif /* CONFIG_CMDLINE */
468 ppc_md.power_save = ppc6xx_idle;
471 ppc_md.power_save = power4_idle;
477 ppc_md.progress("id mach(): done", 0x200);
480 #ifdef CONFIG_BOOKE_WDT
481 /* Checks wdt=x and wdt_period=xx command-line option */
482 int __init early_parse_wdt(char *p)
484 if (p && strncmp(p, "0", 1) != 0)
485 booke_wdt_enabled = 1;
489 early_param("wdt", early_parse_wdt);
491 int __init early_parse_wdt_period (char *p)
494 booke_wdt_period = simple_strtoul(p, NULL, 0);
498 early_param("wdt_period", early_parse_wdt_period);
499 #endif /* CONFIG_BOOKE_WDT */
501 /* Checks "l2cr=xxxx" command-line option */
502 int __init ppc_setup_l2cr(char *str)
504 if (cpu_has_feature(CPU_FTR_L2CR)) {
505 unsigned long val = simple_strtoul(str, NULL, 0);
506 printk(KERN_INFO "l2cr set to %lx\n", val);
507 _set_L2CR(0); /* force invalidate by disable cache */
508 _set_L2CR(val); /* and enable it */
512 __setup("l2cr=", ppc_setup_l2cr);
514 #ifdef CONFIG_GENERIC_NVRAM
516 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
517 unsigned char nvram_read_byte(int addr)
519 if (ppc_md.nvram_read_val)
520 return ppc_md.nvram_read_val(addr);
523 EXPORT_SYMBOL(nvram_read_byte);
525 void nvram_write_byte(unsigned char val, int addr)
527 if (ppc_md.nvram_write_val)
528 ppc_md.nvram_write_val(addr, val);
530 EXPORT_SYMBOL(nvram_write_byte);
532 void nvram_sync(void)
534 if (ppc_md.nvram_sync)
537 EXPORT_SYMBOL(nvram_sync);
539 #endif /* CONFIG_NVRAM */
541 static struct cpu cpu_devices[NR_CPUS];
543 int __init ppc_init(void)
547 /* clear the progress line */
548 if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
550 /* register CPU devices */
551 for (i = 0; i < NR_CPUS; i++)
553 register_cpu(&cpu_devices[i], i, NULL);
555 /* call platform init */
556 if (ppc_md.init != NULL) {
562 arch_initcall(ppc_init);
564 /* Warning, IO base is not yet inited */
565 void __init setup_arch(char **cmdline_p)
568 extern void do_init_bootmem(void);
570 /* so udelay does something sensible, assume <= 1000 bogomips */
571 loops_per_jiffy = 500000000 / HZ;
573 unflatten_device_tree();
574 finish_device_tree();
576 #ifdef CONFIG_BOOTX_TEXT
580 #ifdef CONFIG_PPC_MULTIPLATFORM
581 /* This could be called "early setup arch", it must be done
582 * now because xmon need it
584 if (_machine == _MACH_Pmac)
585 pmac_feature_init(); /* New cool way */
590 if (strstr(cmd_line, "xmon"))
592 #endif /* CONFIG_XMON */
593 if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
595 #if defined(CONFIG_KGDB)
596 if (ppc_md.kgdb_map_scc)
597 ppc_md.kgdb_map_scc();
599 if (strstr(cmd_line, "gdb")) {
601 ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
602 printk("kgdb breakpoint activated\n");
608 * Set cache line size based on type of cpu as a default.
609 * Systems with OF can look in the properties on the cpu node(s)
610 * for a possibly more accurate value.
612 if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
613 dcache_bsize = cur_cpu_spec->dcache_bsize;
614 icache_bsize = cur_cpu_spec->icache_bsize;
617 ucache_bsize = dcache_bsize = icache_bsize
618 = cur_cpu_spec->dcache_bsize;
620 /* reboot on panic */
623 init_mm.start_code = PAGE_OFFSET;
624 init_mm.end_code = (unsigned long) _etext;
625 init_mm.end_data = (unsigned long) _edata;
626 init_mm.brk = (unsigned long) klimit;
628 /* Save unparsed command line copy for /proc/cmdline */
629 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
630 *cmdline_p = cmd_line;
634 /* set up the bootmem stuff with available memory */
636 if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
638 #ifdef CONFIG_PPC_OCP
639 /* Initialize OCP device list */
641 if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
644 #ifdef CONFIG_DUMMY_CONSOLE
645 conswitchp = &dummy_con;
649 if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
653 /* this is for modules since _machine can be a define -- Cort */
654 ppc_md.ppc_machine = _machine;