2 * Powermac setup and early boot code plus other random bits.
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@samba.org)
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..
26 #include <linux/init.h>
27 #include <linux/errno.h>
28 #include <linux/sched.h>
29 #include <linux/kernel.h>
31 #include <linux/stddef.h>
32 #include <linux/unistd.h>
33 #include <linux/ptrace.h>
34 #include <linux/slab.h>
35 #include <linux/user.h>
36 #include <linux/a.out.h>
37 #include <linux/tty.h>
38 #include <linux/string.h>
39 #include <linux/delay.h>
40 #include <linux/ioport.h>
41 #include <linux/major.h>
42 #include <linux/initrd.h>
43 #include <linux/vt_kern.h>
44 #include <linux/console.h>
45 #include <linux/ide.h>
46 #include <linux/pci.h>
47 #include <linux/adb.h>
48 #include <linux/cuda.h>
49 #include <linux/pmu.h>
50 #include <linux/irq.h>
51 #include <linux/seq_file.h>
52 #include <linux/root_dev.h>
53 #include <linux/bitops.h>
54 #include <linux/suspend.h>
57 #include <asm/sections.h>
59 #include <asm/system.h>
60 #include <asm/pgtable.h>
62 #include <asm/kexec.h>
63 #include <asm/pci-bridge.h>
64 #include <asm/ohare.h>
65 #include <asm/mediabay.h>
66 #include <asm/machdep.h>
68 #include <asm/cputable.h>
69 #include <asm/btext.h>
70 #include <asm/pmac_feature.h>
72 #include <asm/of_device.h>
73 #include <asm/mmu_context.h>
74 #include <asm/iommu.h>
82 #undef SHOW_GATWICK_IRQS
84 int ppc_override_l2cr
= 0;
85 int ppc_override_l2cr_value
;
90 static int current_root_goodness
= -1;
92 extern struct machdep_calls pmac_md
;
94 #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
101 extern void zs_kgdb_hook(int tty_num
);
103 sys_ctrler_t sys_ctrler
= SYS_CTRLER_UNKNOWN
;
104 EXPORT_SYMBOL(sys_ctrler
);
106 #ifdef CONFIG_PMAC_SMU
107 unsigned long smu_cmdbuf_abs
;
108 EXPORT_SYMBOL(smu_cmdbuf_abs
);
112 extern struct smp_ops_t psurge_smp_ops
;
113 extern struct smp_ops_t core99_smp_ops
;
114 #endif /* CONFIG_SMP */
116 static void pmac_show_cpuinfo(struct seq_file
*m
)
118 struct device_node
*np
;
122 unsigned int mbflags
;
125 mbmodel
= pmac_call_feature(PMAC_FTR_GET_MB_INFO
, NULL
,
126 PMAC_MB_INFO_MODEL
, 0);
127 mbflags
= pmac_call_feature(PMAC_FTR_GET_MB_INFO
, NULL
,
128 PMAC_MB_INFO_FLAGS
, 0);
129 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO
, NULL
, PMAC_MB_INFO_NAME
,
130 (long) &mbname
) != 0)
133 /* find motherboard type */
134 seq_printf(m
, "machine\t\t: ");
135 np
= of_find_node_by_path("/");
137 pp
= get_property(np
, "model", NULL
);
139 seq_printf(m
, "%s\n", pp
);
141 seq_printf(m
, "PowerMac\n");
142 pp
= get_property(np
, "compatible", &plen
);
144 seq_printf(m
, "motherboard\t:");
146 int l
= strlen(pp
) + 1;
147 seq_printf(m
, " %s", pp
);
155 seq_printf(m
, "PowerMac\n");
157 /* print parsed model */
158 seq_printf(m
, "detected as\t: %d (%s)\n", mbmodel
, mbname
);
159 seq_printf(m
, "pmac flags\t: %08x\n", mbflags
);
161 /* find l2 cache info */
162 np
= of_find_node_by_name(NULL
, "l2-cache");
164 np
= of_find_node_by_type(NULL
, "cache");
166 const unsigned int *ic
= get_property(np
, "i-cache-size", NULL
);
167 const unsigned int *dc
= get_property(np
, "d-cache-size", NULL
);
168 seq_printf(m
, "L2 cache\t:");
170 if (get_property(np
, "cache-unified", NULL
) != 0 && dc
) {
171 seq_printf(m
, " %dK unified", *dc
/ 1024);
174 seq_printf(m
, " %dK instruction", *ic
/ 1024);
176 seq_printf(m
, "%s %dK data",
177 (ic
? " +": ""), *dc
/ 1024);
179 pp
= get_property(np
, "ram-type", NULL
);
181 seq_printf(m
, " %s", pp
);
186 /* Indicate newworld/oldworld */
187 seq_printf(m
, "pmac-generation\t: %s\n",
188 pmac_newworld
? "NewWorld" : "OldWorld");
191 #ifndef CONFIG_ADB_CUDA
192 int find_via_cuda(void)
194 if (!find_devices("via-cuda"))
196 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
197 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
202 #ifndef CONFIG_ADB_PMU
203 int find_via_pmu(void)
205 if (!find_devices("via-pmu"))
207 printk("WARNING ! Your machine is PMU-based but your kernel\n");
208 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
213 #ifndef CONFIG_PMAC_SMU
216 /* should check and warn if SMU is present */
222 static volatile u32
*sysctrl_regs
;
224 static void __init
ohare_init(void)
226 /* this area has the CPU identification register
227 and some registers used by smp boards */
228 sysctrl_regs
= (volatile u32
*) ioremap(0xf8000000, 0x1000);
231 * Turn on the L2 cache.
232 * We assume that we have a PSX memory controller iff
233 * we have an ohare I/O controller.
235 if (find_devices("ohare") != NULL
) {
236 if (((sysctrl_regs
[2] >> 24) & 0xf) >= 3) {
237 if (sysctrl_regs
[4] & 0x10)
238 sysctrl_regs
[4] |= 0x04000020;
240 sysctrl_regs
[4] |= 0x04000000;
242 printk(KERN_INFO
"Level 2 cache enabled\n");
247 static void __init
l2cr_init(void)
249 /* Checks "l2cr-value" property in the registry */
250 if (cpu_has_feature(CPU_FTR_L2CR
)) {
251 struct device_node
*np
= find_devices("cpus");
253 np
= find_type_devices("cpu");
255 const unsigned int *l2cr
=
256 get_property(np
, "l2cr-value", NULL
);
258 ppc_override_l2cr
= 1;
259 ppc_override_l2cr_value
= *l2cr
;
261 _set_L2CR(ppc_override_l2cr_value
);
266 if (ppc_override_l2cr
)
267 printk(KERN_INFO
"L2CR overridden (0x%x), "
268 "backside cache is %s\n",
269 ppc_override_l2cr_value
,
270 (ppc_override_l2cr_value
& 0x80000000)
271 ? "enabled" : "disabled");
275 static void __init
pmac_setup_arch(void)
277 struct device_node
*cpu
, *ic
;
281 pvr
= PVR_VER(mfspr(SPRN_PVR
));
283 /* Set loops_per_jiffy to a half-way reasonable value,
284 for use until calibrate_delay gets called. */
285 loops_per_jiffy
= 50000000 / HZ
;
286 cpu
= of_find_node_by_type(NULL
, "cpu");
288 fp
= get_property(cpu
, "clock-frequency", NULL
);
290 if (pvr
>= 0x30 && pvr
< 0x80)
292 loops_per_jiffy
= *fp
/ (3 * HZ
);
293 else if (pvr
== 4 || pvr
>= 8)
294 /* 604, G3, G4 etc. */
295 loops_per_jiffy
= *fp
/ HZ
;
298 loops_per_jiffy
= *fp
/ (2 * HZ
);
303 /* See if newworld or oldworld */
304 for (ic
= NULL
; (ic
= of_find_all_nodes(ic
)) != NULL
; )
305 if (get_property(ic
, "interrupt-controller", NULL
))
312 /* Lookup PCI hosts */
318 #endif /* CONFIG_PPC32 */
328 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
333 #ifdef CONFIG_BLK_DEV_INITRD
335 ROOT_DEV
= Root_RAM0
;
338 ROOT_DEV
= DEFAULT_ROOT_DEVICE
;
342 /* Check for Core99 */
343 if (find_devices("uni-n") || find_devices("u3") || find_devices("u4"))
344 smp_ops
= &core99_smp_ops
;
347 smp_ops
= &psurge_smp_ops
;
349 #endif /* CONFIG_SMP */
352 if (strstr(cmd_line
, "adb_sync")) {
353 extern int __adb_probe_sync
;
354 __adb_probe_sync
= 1;
356 #endif /* CONFIG_ADB */
364 extern dev_t boot_dev
;
367 void __init
note_scsi_host(struct device_node
*node
, void *host
)
372 l
= strlen(node
->full_name
);
373 if (bootpath
!= NULL
&& bootdevice
!= NULL
374 && strncmp(node
->full_name
, bootdevice
, l
) == 0
375 && (bootdevice
[l
] == '/' || bootdevice
[l
] == 0)) {
378 * There's a bug in OF 1.0.5. (Why am I not surprised.)
379 * If you pass a path like scsi/sd@1:0 to canon, it returns
380 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
381 * That is, the scsi target number doesn't get preserved.
382 * So we pick the target number out of bootpath and use that.
384 p
= strstr(bootpath
, "/sd@");
387 boot_target
= simple_strtoul(p
, NULL
, 10);
390 boot_part
= simple_strtoul(p
+ 1, NULL
, 10);
394 EXPORT_SYMBOL(note_scsi_host
);
397 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
398 static dev_t __init
find_ide_boot(void)
402 dev_t __init
pmac_find_ide_boot(char *bootdevice
, int n
);
404 if (bootdevice
== NULL
)
406 p
= strrchr(bootdevice
, '/');
411 return pmac_find_ide_boot(bootdevice
, n
);
413 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
415 static void __init
find_boot_device(void)
417 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
418 boot_dev
= find_ide_boot();
422 /* TODO: Merge the suspend-to-ram with the common code !!!
423 * currently, this is a stub implementation for suspend-to-disk
427 #ifdef CONFIG_SOFTWARE_SUSPEND
429 static int pmac_pm_prepare(suspend_state_t state
)
431 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
436 static int pmac_pm_enter(suspend_state_t state
)
438 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
440 /* Giveup the lazy FPU & vec so we don't have to back them
441 * up from the low level code
445 #ifdef CONFIG_ALTIVEC
446 if (cur_cpu_spec
->cpu_features
& CPU_FTR_ALTIVEC
)
447 enable_kernel_altivec();
448 #endif /* CONFIG_ALTIVEC */
453 static int pmac_pm_finish(suspend_state_t state
)
455 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
457 /* Restore userland MMU context */
458 set_context(current
->active_mm
->context
.id
, current
->active_mm
->pgd
);
463 static int pmac_pm_valid(suspend_state_t state
)
466 case PM_SUSPEND_DISK
:
468 /* can't do any other states via generic mechanism yet */
474 static struct pm_ops pmac_pm_ops
= {
475 .pm_disk_mode
= PM_DISK_SHUTDOWN
,
476 .prepare
= pmac_pm_prepare
,
477 .enter
= pmac_pm_enter
,
478 .finish
= pmac_pm_finish
,
479 .valid
= pmac_pm_valid
,
482 #endif /* CONFIG_SOFTWARE_SUSPEND */
484 static int initializing
= 1;
486 static int pmac_late_init(void)
489 #ifdef CONFIG_SOFTWARE_SUSPEND
490 pm_set_ops(&pmac_pm_ops
);
491 #endif /* CONFIG_SOFTWARE_SUSPEND */
495 late_initcall(pmac_late_init
);
497 /* can't be __init - can be called whenever a disk is first accessed */
498 void note_bootable_part(dev_t dev
, int part
, int goodness
)
500 static int found_boot
= 0;
505 if ((goodness
<= current_root_goodness
) &&
506 ROOT_DEV
!= DEFAULT_ROOT_DEVICE
)
508 p
= strstr(saved_command_line
, "root=");
509 if (p
!= NULL
&& (p
== saved_command_line
|| p
[-1] == ' '))
516 if (!boot_dev
|| dev
== boot_dev
) {
517 ROOT_DEV
= dev
+ part
;
519 current_root_goodness
= goodness
;
523 #ifdef CONFIG_ADB_CUDA
524 static void cuda_restart(void)
526 struct adb_request req
;
528 cuda_request(&req
, NULL
, 2, CUDA_PACKET
, CUDA_RESET_SYSTEM
);
533 static void cuda_shutdown(void)
535 struct adb_request req
;
537 cuda_request(&req
, NULL
, 2, CUDA_PACKET
, CUDA_POWERDOWN
);
543 #define cuda_restart()
544 #define cuda_shutdown()
547 #ifndef CONFIG_ADB_PMU
548 #define pmu_restart()
549 #define pmu_shutdown()
552 #ifndef CONFIG_PMAC_SMU
553 #define smu_restart()
554 #define smu_shutdown()
557 static void pmac_restart(char *cmd
)
559 switch (sys_ctrler
) {
560 case SYS_CTRLER_CUDA
:
573 static void pmac_power_off(void)
575 switch (sys_ctrler
) {
576 case SYS_CTRLER_CUDA
:
596 * Early initialization.
598 static void __init
pmac_init_early(void)
600 /* Enable early btext debug if requested */
601 if (strstr(cmd_line
, "btextdbg")) {
602 udbg_adb_init_early();
603 register_early_udbg_console();
606 /* Probe motherboard chipset */
609 /* Initialize debug stuff */
610 udbg_scc_init(!!strstr(cmd_line
, "sccdbg"));
611 udbg_adb_init(!!strstr(cmd_line
, "btextdbg"));
614 iommu_init_early_dart();
619 * pmac has no legacy IO, anything calling this function has to
620 * fail or bad things will happen
622 static int pmac_check_legacy_ioport(unsigned int baseport
)
627 static int __init
pmac_declare_of_platform_devices(void)
629 struct device_node
*np
;
631 if (machine_is(chrp
))
634 if (!machine_is(powermac
))
637 np
= of_find_node_by_name(NULL
, "valkyrie");
639 of_platform_device_create(np
, "valkyrie", NULL
);
640 np
= of_find_node_by_name(NULL
, "platinum");
642 of_platform_device_create(np
, "platinum", NULL
);
643 np
= of_find_node_by_type(NULL
, "smu");
645 of_platform_device_create(np
, "smu", NULL
);
652 device_initcall(pmac_declare_of_platform_devices
);
655 * Called very early, MMU is off, device-tree isn't unflattened
657 static int __init
pmac_probe(void)
659 unsigned long root
= of_get_flat_dt_root();
661 if (!of_flat_dt_is_compatible(root
, "Power Macintosh") &&
662 !of_flat_dt_is_compatible(root
, "MacRISC"))
667 * On U3, the DART (iommu) must be allocated now since it
668 * has an impact on htab_initialize (due to the large page it
669 * occupies having to be broken up so the DART itself is not
670 * part of the cacheable linar mapping
678 /* isa_io_base gets set in pmac_pci_init */
679 isa_mem_base
= PMAC_ISA_MEM_BASE
;
680 pci_dram_offset
= PMAC_PCI_DRAM_OFFSET
;
681 ISA_DMA_THRESHOLD
= ~0L;
685 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
686 #ifdef CONFIG_BLK_DEV_IDE_PMAC
687 ppc_ide_md
.ide_init_hwif
= pmac_ide_init_hwif_ports
;
688 ppc_ide_md
.default_io_base
= pmac_ide_get_base
;
689 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
690 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
692 #endif /* CONFIG_PPC32 */
694 #ifdef CONFIG_PMAC_SMU
696 * SMU based G5s need some memory below 2Gb, at least the current
697 * driver needs that. We have to allocate it now. We allocate 4k
698 * (1 small page) for now.
700 smu_cmdbuf_abs
= lmb_alloc_base(4096, 4096, 0x80000000UL
);
701 #endif /* CONFIG_PMAC_SMU */
707 /* Move that to pci.c */
708 static int pmac_pci_probe_mode(struct pci_bus
*bus
)
710 struct device_node
*node
= bus
->sysdata
;
712 /* We need to use normal PCI probing for the AGP bus,
713 * since the device for the AGP bridge isn't in the tree.
715 if (bus
->self
== NULL
&& (device_is_compatible(node
, "u3-agp") ||
716 device_is_compatible(node
, "u4-pcie")))
717 return PCI_PROBE_NORMAL
;
718 return PCI_PROBE_DEVTREE
;
722 define_machine(powermac
) {
725 .setup_arch
= pmac_setup_arch
,
726 .init_early
= pmac_init_early
,
727 .show_cpuinfo
= pmac_show_cpuinfo
,
728 .init_IRQ
= pmac_pic_init
,
729 .get_irq
= NULL
, /* changed later */
730 .pcibios_fixup
= pmac_pcibios_fixup
,
731 .restart
= pmac_restart
,
732 .power_off
= pmac_power_off
,
734 .time_init
= pmac_time_init
,
735 .get_boot_time
= pmac_get_boot_time
,
736 .set_rtc_time
= pmac_set_rtc_time
,
737 .get_rtc_time
= pmac_get_rtc_time
,
738 .calibrate_decr
= pmac_calibrate_decr
,
739 .feature_call
= pmac_do_feature_call
,
740 .check_legacy_ioport
= pmac_check_legacy_ioport
,
741 .progress
= udbg_progress
,
743 .pci_probe_mode
= pmac_pci_probe_mode
,
744 .power_save
= power4_idle
,
745 .enable_pmcs
= power4_enable_pmcs
,
747 .machine_kexec
= default_machine_kexec
,
748 .machine_kexec_prepare
= default_machine_kexec_prepare
,
749 .machine_crash_shutdown
= default_machine_crash_shutdown
,
751 #endif /* CONFIG_PPC64 */
753 .pcibios_enable_device_hook
= pmac_pci_enable_device_hook
,
754 .pcibios_after_init
= pmac_pcibios_after_init
,
755 .phys_mem_access_prot
= pci_phys_mem_access_prot
,
757 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
758 .cpu_die
= generic_mach_cpu_die
,