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
= (char *) get_property(np
, "model", NULL
);
139 seq_printf(m
, "%s\n", pp
);
141 seq_printf(m
, "PowerMac\n");
142 pp
= (char *) 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 unsigned int *ic
= (unsigned int *)
167 get_property(np
, "i-cache-size", NULL
);
168 unsigned int *dc
= (unsigned int *)
169 get_property(np
, "d-cache-size", NULL
);
170 seq_printf(m
, "L2 cache\t:");
172 if (get_property(np
, "cache-unified", NULL
) != 0 && dc
) {
173 seq_printf(m
, " %dK unified", *dc
/ 1024);
176 seq_printf(m
, " %dK instruction", *ic
/ 1024);
178 seq_printf(m
, "%s %dK data",
179 (ic
? " +": ""), *dc
/ 1024);
181 pp
= get_property(np
, "ram-type", NULL
);
183 seq_printf(m
, " %s", pp
);
188 /* Indicate newworld/oldworld */
189 seq_printf(m
, "pmac-generation\t: %s\n",
190 pmac_newworld
? "NewWorld" : "OldWorld");
193 #ifndef CONFIG_ADB_CUDA
194 int find_via_cuda(void)
196 if (!find_devices("via-cuda"))
198 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
199 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
204 #ifndef CONFIG_ADB_PMU
205 int find_via_pmu(void)
207 if (!find_devices("via-pmu"))
209 printk("WARNING ! Your machine is PMU-based but your kernel\n");
210 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
215 #ifndef CONFIG_PMAC_SMU
218 /* should check and warn if SMU is present */
224 static volatile u32
*sysctrl_regs
;
226 static void __init
ohare_init(void)
228 /* this area has the CPU identification register
229 and some registers used by smp boards */
230 sysctrl_regs
= (volatile u32
*) ioremap(0xf8000000, 0x1000);
233 * Turn on the L2 cache.
234 * We assume that we have a PSX memory controller iff
235 * we have an ohare I/O controller.
237 if (find_devices("ohare") != NULL
) {
238 if (((sysctrl_regs
[2] >> 24) & 0xf) >= 3) {
239 if (sysctrl_regs
[4] & 0x10)
240 sysctrl_regs
[4] |= 0x04000020;
242 sysctrl_regs
[4] |= 0x04000000;
244 printk(KERN_INFO
"Level 2 cache enabled\n");
249 static void __init
l2cr_init(void)
251 /* Checks "l2cr-value" property in the registry */
252 if (cpu_has_feature(CPU_FTR_L2CR
)) {
253 struct device_node
*np
= find_devices("cpus");
255 np
= find_type_devices("cpu");
257 unsigned int *l2cr
= (unsigned int *)
258 get_property(np
, "l2cr-value", NULL
);
260 ppc_override_l2cr
= 1;
261 ppc_override_l2cr_value
= *l2cr
;
263 _set_L2CR(ppc_override_l2cr_value
);
268 if (ppc_override_l2cr
)
269 printk(KERN_INFO
"L2CR overridden (0x%x), "
270 "backside cache is %s\n",
271 ppc_override_l2cr_value
,
272 (ppc_override_l2cr_value
& 0x80000000)
273 ? "enabled" : "disabled");
277 static void __init
pmac_setup_arch(void)
279 struct device_node
*cpu
, *ic
;
283 pvr
= PVR_VER(mfspr(SPRN_PVR
));
285 /* Set loops_per_jiffy to a half-way reasonable value,
286 for use until calibrate_delay gets called. */
287 loops_per_jiffy
= 50000000 / HZ
;
288 cpu
= of_find_node_by_type(NULL
, "cpu");
290 fp
= (int *) get_property(cpu
, "clock-frequency", NULL
);
292 if (pvr
>= 0x30 && pvr
< 0x80)
294 loops_per_jiffy
= *fp
/ (3 * HZ
);
295 else if (pvr
== 4 || pvr
>= 8)
296 /* 604, G3, G4 etc. */
297 loops_per_jiffy
= *fp
/ HZ
;
300 loops_per_jiffy
= *fp
/ (2 * HZ
);
305 /* See if newworld or oldworld */
306 for (ic
= NULL
; (ic
= of_find_all_nodes(ic
)) != NULL
; )
307 if (get_property(ic
, "interrupt-controller", NULL
))
314 /* Lookup PCI hosts */
320 #endif /* CONFIG_PPC32 */
330 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
335 #ifdef CONFIG_BLK_DEV_INITRD
337 ROOT_DEV
= Root_RAM0
;
340 ROOT_DEV
= DEFAULT_ROOT_DEVICE
;
344 /* Check for Core99 */
345 if (find_devices("uni-n") || find_devices("u3") || find_devices("u4"))
346 smp_ops
= &core99_smp_ops
;
349 smp_ops
= &psurge_smp_ops
;
351 #endif /* CONFIG_SMP */
354 if (strstr(cmd_line
, "adb_sync")) {
355 extern int __adb_probe_sync
;
356 __adb_probe_sync
= 1;
358 #endif /* CONFIG_ADB */
366 extern dev_t boot_dev
;
369 void __init
note_scsi_host(struct device_node
*node
, void *host
)
374 l
= strlen(node
->full_name
);
375 if (bootpath
!= NULL
&& bootdevice
!= NULL
376 && strncmp(node
->full_name
, bootdevice
, l
) == 0
377 && (bootdevice
[l
] == '/' || bootdevice
[l
] == 0)) {
380 * There's a bug in OF 1.0.5. (Why am I not surprised.)
381 * If you pass a path like scsi/sd@1:0 to canon, it returns
382 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
383 * That is, the scsi target number doesn't get preserved.
384 * So we pick the target number out of bootpath and use that.
386 p
= strstr(bootpath
, "/sd@");
389 boot_target
= simple_strtoul(p
, NULL
, 10);
392 boot_part
= simple_strtoul(p
+ 1, NULL
, 10);
396 EXPORT_SYMBOL(note_scsi_host
);
399 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
400 static dev_t __init
find_ide_boot(void)
404 dev_t __init
pmac_find_ide_boot(char *bootdevice
, int n
);
406 if (bootdevice
== NULL
)
408 p
= strrchr(bootdevice
, '/');
413 return pmac_find_ide_boot(bootdevice
, n
);
415 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
417 static void __init
find_boot_device(void)
419 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
420 boot_dev
= find_ide_boot();
424 /* TODO: Merge the suspend-to-ram with the common code !!!
425 * currently, this is a stub implementation for suspend-to-disk
429 #ifdef CONFIG_SOFTWARE_SUSPEND
431 static int pmac_pm_prepare(suspend_state_t state
)
433 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
438 static int pmac_pm_enter(suspend_state_t state
)
440 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
442 /* Giveup the lazy FPU & vec so we don't have to back them
443 * up from the low level code
447 #ifdef CONFIG_ALTIVEC
448 if (cur_cpu_spec
->cpu_features
& CPU_FTR_ALTIVEC
)
449 enable_kernel_altivec();
450 #endif /* CONFIG_ALTIVEC */
455 static int pmac_pm_finish(suspend_state_t state
)
457 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
459 /* Restore userland MMU context */
460 set_context(current
->active_mm
->context
.id
, current
->active_mm
->pgd
);
465 static int pmac_pm_valid(suspend_state_t state
)
468 case PM_SUSPEND_DISK
:
470 /* can't do any other states via generic mechanism yet */
476 static struct pm_ops pmac_pm_ops
= {
477 .pm_disk_mode
= PM_DISK_SHUTDOWN
,
478 .prepare
= pmac_pm_prepare
,
479 .enter
= pmac_pm_enter
,
480 .finish
= pmac_pm_finish
,
481 .valid
= pmac_pm_valid
,
484 #endif /* CONFIG_SOFTWARE_SUSPEND */
486 static int initializing
= 1;
488 static int pmac_late_init(void)
491 #ifdef CONFIG_SOFTWARE_SUSPEND
492 pm_set_ops(&pmac_pm_ops
);
493 #endif /* CONFIG_SOFTWARE_SUSPEND */
497 late_initcall(pmac_late_init
);
499 /* can't be __init - can be called whenever a disk is first accessed */
500 void note_bootable_part(dev_t dev
, int part
, int goodness
)
502 static int found_boot
= 0;
507 if ((goodness
<= current_root_goodness
) &&
508 ROOT_DEV
!= DEFAULT_ROOT_DEVICE
)
510 p
= strstr(saved_command_line
, "root=");
511 if (p
!= NULL
&& (p
== saved_command_line
|| p
[-1] == ' '))
518 if (!boot_dev
|| dev
== boot_dev
) {
519 ROOT_DEV
= dev
+ part
;
521 current_root_goodness
= goodness
;
525 #ifdef CONFIG_ADB_CUDA
526 static void cuda_restart(void)
528 struct adb_request req
;
530 cuda_request(&req
, NULL
, 2, CUDA_PACKET
, CUDA_RESET_SYSTEM
);
535 static void cuda_shutdown(void)
537 struct adb_request req
;
539 cuda_request(&req
, NULL
, 2, CUDA_PACKET
, CUDA_POWERDOWN
);
545 #define cuda_restart()
546 #define cuda_shutdown()
549 #ifndef CONFIG_ADB_PMU
550 #define pmu_restart()
551 #define pmu_shutdown()
554 #ifndef CONFIG_PMAC_SMU
555 #define smu_restart()
556 #define smu_shutdown()
559 static void pmac_restart(char *cmd
)
561 switch (sys_ctrler
) {
562 case SYS_CTRLER_CUDA
:
575 static void pmac_power_off(void)
577 switch (sys_ctrler
) {
578 case SYS_CTRLER_CUDA
:
598 * Early initialization.
600 static void __init
pmac_init_early(void)
602 /* Enable early btext debug if requested */
603 if (strstr(cmd_line
, "btextdbg")) {
604 udbg_adb_init_early();
605 register_early_udbg_console();
608 /* Probe motherboard chipset */
611 /* Initialize debug stuff */
612 udbg_scc_init(!!strstr(cmd_line
, "sccdbg"));
613 udbg_adb_init(!!strstr(cmd_line
, "btextdbg"));
616 iommu_init_early_dart();
621 * pmac has no legacy IO, anything calling this function has to
622 * fail or bad things will happen
624 static int pmac_check_legacy_ioport(unsigned int baseport
)
629 static int __init
pmac_declare_of_platform_devices(void)
631 struct device_node
*np
;
633 if (machine_is(chrp
))
636 if (!machine_is(powermac
))
639 np
= of_find_node_by_name(NULL
, "valkyrie");
641 of_platform_device_create(np
, "valkyrie", NULL
);
642 np
= of_find_node_by_name(NULL
, "platinum");
644 of_platform_device_create(np
, "platinum", NULL
);
645 np
= of_find_node_by_type(NULL
, "smu");
647 of_platform_device_create(np
, "smu", NULL
);
654 device_initcall(pmac_declare_of_platform_devices
);
657 * Called very early, MMU is off, device-tree isn't unflattened
659 static int __init
pmac_probe(void)
661 unsigned long root
= of_get_flat_dt_root();
663 if (!of_flat_dt_is_compatible(root
, "Power Macintosh") &&
664 !of_flat_dt_is_compatible(root
, "MacRISC"))
669 * On U3, the DART (iommu) must be allocated now since it
670 * has an impact on htab_initialize (due to the large page it
671 * occupies having to be broken up so the DART itself is not
672 * part of the cacheable linar mapping
680 /* isa_io_base gets set in pmac_pci_init */
681 isa_mem_base
= PMAC_ISA_MEM_BASE
;
682 pci_dram_offset
= PMAC_PCI_DRAM_OFFSET
;
683 ISA_DMA_THRESHOLD
= ~0L;
687 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
688 #ifdef CONFIG_BLK_DEV_IDE_PMAC
689 ppc_ide_md
.ide_init_hwif
= pmac_ide_init_hwif_ports
;
690 ppc_ide_md
.default_io_base
= pmac_ide_get_base
;
691 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
692 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
694 #endif /* CONFIG_PPC32 */
696 #ifdef CONFIG_PMAC_SMU
698 * SMU based G5s need some memory below 2Gb, at least the current
699 * driver needs that. We have to allocate it now. We allocate 4k
700 * (1 small page) for now.
702 smu_cmdbuf_abs
= lmb_alloc_base(4096, 4096, 0x80000000UL
);
703 #endif /* CONFIG_PMAC_SMU */
709 /* Move that to pci.c */
710 static int pmac_pci_probe_mode(struct pci_bus
*bus
)
712 struct device_node
*node
= bus
->sysdata
;
714 /* We need to use normal PCI probing for the AGP bus,
715 * since the device for the AGP bridge isn't in the tree.
717 if (bus
->self
== NULL
&& (device_is_compatible(node
, "u3-agp") ||
718 device_is_compatible(node
, "u4-pcie")))
719 return PCI_PROBE_NORMAL
;
720 return PCI_PROBE_DEVTREE
;
724 define_machine(powermac
) {
727 .setup_arch
= pmac_setup_arch
,
728 .init_early
= pmac_init_early
,
729 .show_cpuinfo
= pmac_show_cpuinfo
,
730 .init_IRQ
= pmac_pic_init
,
731 .get_irq
= NULL
, /* changed later */
732 .pcibios_fixup
= pmac_pcibios_fixup
,
733 .restart
= pmac_restart
,
734 .power_off
= pmac_power_off
,
736 .time_init
= pmac_time_init
,
737 .get_boot_time
= pmac_get_boot_time
,
738 .set_rtc_time
= pmac_set_rtc_time
,
739 .get_rtc_time
= pmac_get_rtc_time
,
740 .calibrate_decr
= pmac_calibrate_decr
,
741 .feature_call
= pmac_do_feature_call
,
742 .check_legacy_ioport
= pmac_check_legacy_ioport
,
743 .progress
= udbg_progress
,
745 .pci_probe_mode
= pmac_pci_probe_mode
,
746 .power_save
= power4_idle
,
747 .enable_pmcs
= power4_enable_pmcs
,
749 .machine_kexec
= default_machine_kexec
,
750 .machine_kexec_prepare
= default_machine_kexec_prepare
,
751 .machine_crash_shutdown
= default_machine_crash_shutdown
,
753 #endif /* CONFIG_PPC64 */
755 .pcibios_enable_device_hook
= pmac_pci_enable_device_hook
,
756 .pcibios_after_init
= pmac_pcibios_after_init
,
757 .phys_mem_access_prot
= pci_phys_mem_access_prot
,
759 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
760 .cpu_die
= generic_mach_cpu_die
,