2 * arch/ppc/platforms/setup.c
5 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
7 * Adapted for Power Macintosh by Paul Mackerras
8 * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
10 * Derived from "arch/alpha/kernel/setup.c"
11 * Copyright (C) 1995 Linus Torvalds
13 * Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
23 * bootup setup stuff..
28 #include <linux/config.h>
29 #include <linux/init.h>
30 #include <linux/errno.h>
31 #include <linux/sched.h>
32 #include <linux/kernel.h>
34 #include <linux/stddef.h>
35 #include <linux/unistd.h>
36 #include <linux/ptrace.h>
37 #include <linux/slab.h>
38 #include <linux/user.h>
39 #include <linux/a.out.h>
40 #include <linux/tty.h>
41 #include <linux/string.h>
42 #include <linux/delay.h>
43 #include <linux/ioport.h>
44 #include <linux/major.h>
45 #include <linux/initrd.h>
46 #include <linux/vt_kern.h>
47 #include <linux/console.h>
48 #include <linux/ide.h>
49 #include <linux/pci.h>
50 #include <linux/adb.h>
51 #include <linux/cuda.h>
52 #include <linux/pmu.h>
53 #include <linux/irq.h>
54 #include <linux/seq_file.h>
55 #include <linux/root_dev.h>
56 #include <linux/bitops.h>
58 #include <asm/processor.h>
59 #include <asm/sections.h>
61 #include <asm/system.h>
63 #include <asm/pci-bridge.h>
64 #include <asm/iommu.h>
65 #include <asm/machdep.h>
67 #include <asm/btext.h>
68 #include <asm/cputable.h>
69 #include <asm/pmac_feature.h>
71 #include <asm/of_device.h>
78 #define DBG(fmt...) udbg_printf(fmt)
84 static int current_root_goodness = -1;
85 #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
87 extern int powersave_nap;
90 extern void udbg_init_scc(struct device_node *np);
92 void __pmac pmac_show_cpuinfo(struct seq_file *m)
94 struct device_node *np;
98 int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
99 PMAC_MB_INFO_MODEL, 0);
100 unsigned int mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
101 PMAC_MB_INFO_FLAGS, 0);
103 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
107 /* find motherboard type */
108 seq_printf(m, "machine\t\t: ");
109 np = find_devices("device-tree");
111 pp = (char *) get_property(np, "model", NULL);
113 seq_printf(m, "%s\n", pp);
115 seq_printf(m, "PowerMac\n");
116 pp = (char *) get_property(np, "compatible", &plen);
118 seq_printf(m, "motherboard\t:");
120 int l = strlen(pp) + 1;
121 seq_printf(m, " %s", pp);
128 seq_printf(m, "PowerMac\n");
130 /* print parsed model */
131 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
132 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
134 /* Indicate newworld */
135 seq_printf(m, "pmac-generation\t: NewWorld\n");
139 void __init pmac_setup_arch(void)
141 /* init to some ~sane value until calibrate_delay() runs */
142 loops_per_jiffy = 50000000;
144 /* Probe motherboard chipset */
147 /* Lock-enable the SCC channel used for debug */
149 np = of_find_node_by_name(NULL, "escc");
151 pmac_call_feature(PMAC_FTR_SCC_ENABLE, np,
152 PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
158 /* Initialize the PMU */
161 /* Init NVRAM access */
164 /* Setup SMP callback */
169 /* Lookup PCI hosts */
172 #ifdef CONFIG_DUMMY_CONSOLE
173 conswitchp = &dummy_con;
178 void note_scsi_host(struct device_node *node, void *host)
185 static int initializing = 1;
187 static int pmac_late_init(void)
193 late_initcall(pmac_late_init);
195 /* can't be __init - can be called whenever a disk is first accessed */
196 void __pmac note_bootable_part(dev_t dev, int part, int goodness)
198 extern dev_t boot_dev;
203 if ((goodness <= current_root_goodness) &&
204 ROOT_DEV != DEFAULT_ROOT_DEVICE)
206 p = strstr(saved_command_line, "root=");
207 if (p != NULL && (p == saved_command_line || p[-1] == ' '))
210 if (!boot_dev || dev == boot_dev) {
211 ROOT_DEV = dev + part;
213 current_root_goodness = goodness;
217 void __pmac pmac_restart(char *cmd)
222 void __pmac pmac_power_off(void)
227 void __pmac pmac_halt(void)
232 #ifdef CONFIG_BOOTX_TEXT
233 static int dummy_getc_poll(void)
238 static unsigned char dummy_getc(void)
243 static void btext_putc(unsigned char c)
247 #endif /* CONFIG_BOOTX_TEXT */
249 static void __init init_boot_display(void)
252 struct device_node *np = NULL;
255 printk("trying to initialize btext ...\n");
257 name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
259 np = of_find_node_by_path(name);
261 if (strcmp(np->type, "display") != 0) {
262 printk("boot stdout isn't a display !\n");
269 rc = btext_initialize(np);
273 for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
274 if (get_property(np, "linux,opened", NULL)) {
275 printk("trying %s ...\n", np->full_name);
276 rc = btext_initialize(np);
277 printk("result: %d\n", rc);
285 * Early initialization.
287 void __init pmac_init_early(void)
289 DBG(" -> pmac_init_early\n");
291 /* Initialize hash table, from now on, we can take hash faults
297 if (strstr(cmd_line, "sccdbg")) {
303 #ifdef CONFIG_BOOTX_TEXT
306 ppc_md.udbg_putc = btext_putc;
307 ppc_md.udbg_getc = dummy_getc;
308 ppc_md.udbg_getc_poll = dummy_getc_poll;
309 #endif /* CONFIG_BOOTX_TEXT */
312 /* Setup interrupt mapping options */
313 ppc64_interrupt_controller = IC_OPEN_PIC;
315 iommu_init_early_u3();
317 DBG(" <- pmac_init_early\n");
320 static int pmac_u3_cascade(struct pt_regs *regs, void *data)
322 return mpic_get_one_irq((struct mpic *)data, regs);
325 static __init void pmac_init_IRQ(void)
327 struct device_node *irqctrler = NULL;
328 struct device_node *irqctrler2 = NULL;
329 struct device_node *np = NULL;
330 struct mpic *mpic1, *mpic2;
332 /* We first try to detect Apple's new Core99 chipset, since mac-io
333 * is quite different on those machines and contains an IBM MPIC2.
335 while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
336 struct device_node *parent = of_get_parent(np);
337 if (parent && !strcmp(parent->name, "u3"))
338 irqctrler2 = of_node_get(np);
340 irqctrler = of_node_get(np);
343 if (irqctrler != NULL && irqctrler->n_addrs > 0) {
344 unsigned char senses[128];
346 printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
347 (unsigned int)irqctrler->addrs[0].address);
349 prom_get_irq_senses(senses, 0, 128);
350 mpic1 = mpic_alloc(irqctrler->addrs[0].address,
351 MPIC_PRIMARY | MPIC_WANTS_RESET,
352 0, 0, 128, 256, senses, 128, " K2-MPIC ");
353 BUG_ON(mpic1 == NULL);
356 if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
357 irqctrler2->n_addrs > 0) {
358 printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
359 (u32)irqctrler2->addrs[0].address,
360 irqctrler2->intrs[0].line);
362 pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
363 prom_get_irq_senses(senses, 128, 128 + 128);
365 /* We don't need to set MPIC_BROKEN_U3 here since we don't have
366 * hypertransport interrupts routed to it
368 mpic2 = mpic_alloc(irqctrler2->addrs[0].address,
369 MPIC_BIG_ENDIAN | MPIC_WANTS_RESET,
370 0, 128, 128, 0, senses, 128, " U3-MPIC ");
371 BUG_ON(mpic2 == NULL);
373 mpic_setup_cascade(irqctrler2->intrs[0].line,
374 pmac_u3_cascade, mpic2);
377 of_node_put(irqctrler);
378 of_node_put(irqctrler2);
381 static void __init pmac_progress(char *s, unsigned short hex)
387 #ifdef CONFIG_BOOTX_TEXT
388 else if (boot_text_mapped) {
390 btext_drawstring("\n");
392 #endif /* CONFIG_BOOTX_TEXT */
396 * pmac has no legacy IO, anything calling this function has to
397 * fail or bad things will happen
399 static int pmac_check_legacy_ioport(unsigned int baseport)
404 static int __init pmac_declare_of_platform_devices(void)
406 struct device_node *np;
408 np = find_devices("u3");
410 for (np = np->child; np != NULL; np = np->sibling)
411 if (strncmp(np->name, "i2c", 3) == 0) {
412 of_platform_device_create(np, "u3-i2c");
420 device_initcall(pmac_declare_of_platform_devices);
423 * Called very early, MMU is off, device-tree isn't unflattened
425 static int __init pmac_probe(int platform)
427 if (platform != PLATFORM_POWERMAC)
431 * On U3, the DART (iommu) must be allocated now since it
432 * has an impact on htab_initialize (due to the large page it
433 * occupies having to be broken up so the DART itself is not
434 * part of the cacheable linar mapping
436 alloc_u3_dart_table();
441 struct machdep_calls __initdata pmac_md = {
443 .setup_arch = pmac_setup_arch,
444 .init_early = pmac_init_early,
445 .get_cpuinfo = pmac_show_cpuinfo,
446 .init_IRQ = pmac_init_IRQ,
447 .get_irq = mpic_get_irq,
448 .pcibios_fixup = pmac_pcibios_fixup,
449 .restart = pmac_restart,
450 .power_off = pmac_power_off,
452 .get_boot_time = pmac_get_boot_time,
453 .set_rtc_time = pmac_set_rtc_time,
454 .get_rtc_time = pmac_get_rtc_time,
455 .calibrate_decr = pmac_calibrate_decr,
456 .feature_call = pmac_do_feature_call,
457 .progress = pmac_progress,
458 .check_legacy_ioport = pmac_check_legacy_ioport