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>
57 #include <asm/processor.h>
58 #include <asm/sections.h>
60 #include <asm/system.h>
61 #include <asm/pgtable.h>
62 #include <asm/bitops.h>
64 #include <asm/pci-bridge.h>
65 #include <asm/iommu.h>
66 #include <asm/machdep.h>
68 #include <asm/btext.h>
69 #include <asm/cputable.h>
70 #include <asm/pmac_feature.h>
72 #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 /* Setup the PCI DMA to "direct" by default. May be overriden
172 pci_dma_init_direct();
174 /* Lookup PCI hosts */
177 #ifdef CONFIG_DUMMY_CONSOLE
178 conswitchp
= &dummy_con
;
183 void note_scsi_host(struct device_node
*node
, void *host
)
190 static int initializing
= 1;
192 static int pmac_late_init(void)
198 late_initcall(pmac_late_init
);
200 /* can't be __init - can be called whenever a disk is first accessed */
201 void __pmac
note_bootable_part(dev_t dev
, int part
, int goodness
)
203 extern dev_t boot_dev
;
208 if ((goodness
<= current_root_goodness
) &&
209 ROOT_DEV
!= DEFAULT_ROOT_DEVICE
)
211 p
= strstr(saved_command_line
, "root=");
212 if (p
!= NULL
&& (p
== saved_command_line
|| p
[-1] == ' '))
215 if (!boot_dev
|| dev
== boot_dev
) {
216 ROOT_DEV
= dev
+ part
;
218 current_root_goodness
= goodness
;
222 void __pmac
pmac_restart(char *cmd
)
227 void __pmac
pmac_power_off(void)
232 void __pmac
pmac_halt(void)
237 #ifdef CONFIG_BOOTX_TEXT
238 static int dummy_getc_poll(void)
243 static unsigned char dummy_getc(void)
248 static void btext_putc(unsigned char c
)
252 #endif /* CONFIG_BOOTX_TEXT */
254 static void __init
init_boot_display(void)
257 struct device_node
*np
= NULL
;
260 printk("trying to initialize btext ...\n");
262 name
= (char *)get_property(of_chosen
, "linux,stdout-path", NULL
);
264 np
= of_find_node_by_path(name
);
266 if (strcmp(np
->type
, "display") != 0) {
267 printk("boot stdout isn't a display !\n");
274 rc
= btext_initialize(np
);
278 for (np
= NULL
; (np
= of_find_node_by_type(np
, "display"));) {
279 if (get_property(np
, "linux,opened", NULL
)) {
280 printk("trying %s ...\n", np
->full_name
);
281 rc
= btext_initialize(np
);
282 printk("result: %d\n", rc
);
290 * Early initialization.
292 void __init
pmac_init_early(void)
294 DBG(" -> pmac_init_early\n");
296 /* Initialize hash table, from now on, we can take hash faults
302 if (strstr(cmd_line
, "sccdbg")) {
308 #ifdef CONFIG_BOOTX_TEXT
311 ppc_md
.udbg_putc
= btext_putc
;
312 ppc_md
.udbg_getc
= dummy_getc
;
313 ppc_md
.udbg_getc_poll
= dummy_getc_poll
;
314 #endif /* CONFIG_BOOTX_TEXT */
317 /* Setup interrupt mapping options */
318 naca
->interrupt_controller
= IC_OPEN_PIC
;
320 DBG(" <- pmac_init_early\n");
323 extern void* OpenPIC_Addr
;
324 extern void* OpenPIC2_Addr
;
325 extern u_int OpenPIC_NumInitSenses
;
326 extern u_char
*OpenPIC_InitSenses
;
327 extern void openpic_init(int main_pic
, int offset
, unsigned char* chrp_ack
,
328 int programmer_switch_irq
);
329 extern void openpic2_init(int offset
);
330 extern int openpic_get_irq(struct pt_regs
*regs
);
331 extern int openpic2_get_irq(struct pt_regs
*regs
);
333 static int pmac_cascade_irq
= -1;
335 static irqreturn_t
pmac_u3_do_cascade(int cpl
, void *dev_id
, struct pt_regs
*regs
)
340 irq
= openpic2_get_irq(regs
);
343 ppc_irq_dispatch_handler(regs
, irq
);
348 static __init
void pmac_init_IRQ(void)
350 struct device_node
*irqctrler
= NULL
;
351 struct device_node
*irqctrler2
= NULL
;
352 struct device_node
*np
= NULL
;
354 /* We first try to detect Apple's new Core99 chipset, since mac-io
355 * is quite different on those machines and contains an IBM MPIC2.
357 while ((np
= of_find_node_by_type(np
, "open-pic")) != NULL
) {
358 struct device_node
*parent
= of_get_parent(np
);
359 if (parent
&& !strcmp(parent
->name
, "u3"))
360 irqctrler2
= of_node_get(np
);
362 irqctrler
= of_node_get(np
);
365 if (irqctrler
!= NULL
&& irqctrler
->n_addrs
> 0) {
366 unsigned char senses
[128];
368 printk(KERN_INFO
"PowerMac using OpenPIC irq controller at 0x%08x\n",
369 (unsigned int)irqctrler
->addrs
[0].address
);
371 prom_get_irq_senses(senses
, 0, 128);
372 OpenPIC_InitSenses
= senses
;
373 OpenPIC_NumInitSenses
= 128;
374 OpenPIC_Addr
= ioremap(irqctrler
->addrs
[0].address
,
375 irqctrler
->addrs
[0].size
);
376 openpic_init(1, 0, NULL
, -1);
378 if (irqctrler2
!= NULL
&& irqctrler2
->n_intrs
> 0 &&
379 irqctrler2
->n_addrs
> 0) {
380 printk(KERN_INFO
"Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
381 (u32
)irqctrler2
->addrs
[0].address
,
382 irqctrler2
->intrs
[0].line
);
383 pmac_call_feature(PMAC_FTR_ENABLE_MPIC
, irqctrler2
, 0, 0);
384 OpenPIC2_Addr
= ioremap(irqctrler2
->addrs
[0].address
,
385 irqctrler2
->addrs
[0].size
);
386 prom_get_irq_senses(senses
, 128, 128 + 128);
387 OpenPIC_InitSenses
= senses
;
388 OpenPIC_NumInitSenses
= 128;
390 pmac_cascade_irq
= irqctrler2
->intrs
[0].line
;
393 of_node_put(irqctrler
);
394 of_node_put(irqctrler2
);
397 /* We cannot do request_irq too early ... Right now, we get the
398 * cascade as a core_initcall, which should be fine for our needs
400 static int __init
pmac_irq_cascade_init(void)
402 if (request_irq(pmac_cascade_irq
, pmac_u3_do_cascade
, 0,
403 "U3->K2 Cascade", NULL
))
404 printk(KERN_ERR
"Unable to get OpenPIC IRQ for cascade\n");
408 core_initcall(pmac_irq_cascade_init
);
410 static void __init
pmac_progress(char *s
, unsigned short hex
)
416 #ifdef CONFIG_BOOTX_TEXT
417 else if (boot_text_mapped
) {
419 btext_drawstring("\n");
421 #endif /* CONFIG_BOOTX_TEXT */
424 static int __init
pmac_declare_of_platform_devices(void)
426 struct device_node
*np
;
428 np
= find_devices("u3");
430 for (np
= np
->child
; np
!= NULL
; np
= np
->sibling
)
431 if (strncmp(np
->name
, "i2c", 3) == 0) {
432 of_platform_device_create(np
, "u3-i2c");
440 device_initcall(pmac_declare_of_platform_devices
);
443 * Called very early, MMU is off, device-tree isn't unflattened
445 static int __init
pmac_probe(int platform
)
447 if (platform
!= PLATFORM_POWERMAC
)
451 * On U3, the DART (iommu) must be allocated now since it
452 * has an impact on htab_initialize (due to the large page it
453 * occupies having to be broken up so the DART itself is not
454 * part of the cacheable linar mapping
456 alloc_u3_dart_table();
461 struct machdep_calls __initdata pmac_md
= {
463 .setup_arch
= pmac_setup_arch
,
464 .init_early
= pmac_init_early
,
465 .get_cpuinfo
= pmac_show_cpuinfo
,
466 .init_IRQ
= pmac_init_IRQ
,
467 .get_irq
= openpic_get_irq
,
468 .pcibios_fixup
= pmac_pcibios_fixup
,
469 .restart
= pmac_restart
,
470 .power_off
= pmac_power_off
,
472 .get_boot_time
= pmac_get_boot_time
,
473 .set_rtc_time
= pmac_set_rtc_time
,
474 .get_rtc_time
= pmac_get_rtc_time
,
475 .calibrate_decr
= pmac_calibrate_decr
,
476 .feature_call
= pmac_do_feature_call
,
477 .progress
= pmac_progress
,