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/config.h>
27 #include <linux/init.h>
28 #include <linux/errno.h>
29 #include <linux/sched.h>
30 #include <linux/kernel.h>
32 #include <linux/stddef.h>
33 #include <linux/unistd.h>
34 #include <linux/ptrace.h>
35 #include <linux/slab.h>
36 #include <linux/user.h>
37 #include <linux/a.out.h>
38 #include <linux/tty.h>
39 #include <linux/string.h>
40 #include <linux/delay.h>
41 #include <linux/ioport.h>
42 #include <linux/major.h>
43 #include <linux/initrd.h>
44 #include <linux/vt_kern.h>
45 #include <linux/console.h>
46 #include <linux/ide.h>
47 #include <linux/pci.h>
48 #include <linux/adb.h>
49 #include <linux/cuda.h>
50 #include <linux/pmu.h>
51 #include <linux/irq.h>
52 #include <linux/seq_file.h>
53 #include <linux/root_dev.h>
54 #include <linux/bitops.h>
55 #include <linux/suspend.h>
58 #include <asm/sections.h>
60 #include <asm/system.h>
61 #include <asm/pgtable.h>
63 #include <asm/kexec.h>
64 #include <asm/pci-bridge.h>
65 #include <asm/ohare.h>
66 #include <asm/mediabay.h>
67 #include <asm/machdep.h>
69 #include <asm/cputable.h>
70 #include <asm/btext.h>
71 #include <asm/pmac_feature.h>
73 #include <asm/of_device.h>
74 #include <asm/mmu_context.h>
75 #include <asm/iommu.h>
83 #undef SHOW_GATWICK_IRQS
85 int ppc_override_l2cr
= 0;
86 int ppc_override_l2cr_value
;
91 static int current_root_goodness
= -1;
93 extern struct machdep_calls pmac_md
;
95 #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
102 extern void zs_kgdb_hook(int tty_num
);
104 sys_ctrler_t sys_ctrler
= SYS_CTRLER_UNKNOWN
;
105 EXPORT_SYMBOL(sys_ctrler
);
107 #ifdef CONFIG_PMAC_SMU
108 unsigned long smu_cmdbuf_abs
;
109 EXPORT_SYMBOL(smu_cmdbuf_abs
);
113 extern struct smp_ops_t psurge_smp_ops
;
114 extern struct smp_ops_t core99_smp_ops
;
115 #endif /* CONFIG_SMP */
117 static void pmac_show_cpuinfo(struct seq_file
*m
)
119 struct device_node
*np
;
123 unsigned int mbflags
;
126 mbmodel
= pmac_call_feature(PMAC_FTR_GET_MB_INFO
, NULL
,
127 PMAC_MB_INFO_MODEL
, 0);
128 mbflags
= pmac_call_feature(PMAC_FTR_GET_MB_INFO
, NULL
,
129 PMAC_MB_INFO_FLAGS
, 0);
130 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO
, NULL
, PMAC_MB_INFO_NAME
,
131 (long) &mbname
) != 0)
134 /* find motherboard type */
135 seq_printf(m
, "machine\t\t: ");
136 np
= of_find_node_by_path("/");
138 pp
= (char *) get_property(np
, "model", NULL
);
140 seq_printf(m
, "%s\n", pp
);
142 seq_printf(m
, "PowerMac\n");
143 pp
= (char *) get_property(np
, "compatible", &plen
);
145 seq_printf(m
, "motherboard\t:");
147 int l
= strlen(pp
) + 1;
148 seq_printf(m
, " %s", pp
);
156 seq_printf(m
, "PowerMac\n");
158 /* print parsed model */
159 seq_printf(m
, "detected as\t: %d (%s)\n", mbmodel
, mbname
);
160 seq_printf(m
, "pmac flags\t: %08x\n", mbflags
);
162 /* find l2 cache info */
163 np
= of_find_node_by_name(NULL
, "l2-cache");
165 np
= of_find_node_by_type(NULL
, "cache");
167 unsigned int *ic
= (unsigned int *)
168 get_property(np
, "i-cache-size", NULL
);
169 unsigned int *dc
= (unsigned int *)
170 get_property(np
, "d-cache-size", NULL
);
171 seq_printf(m
, "L2 cache\t:");
173 if (get_property(np
, "cache-unified", NULL
) != 0 && dc
) {
174 seq_printf(m
, " %dK unified", *dc
/ 1024);
177 seq_printf(m
, " %dK instruction", *ic
/ 1024);
179 seq_printf(m
, "%s %dK data",
180 (ic
? " +": ""), *dc
/ 1024);
182 pp
= get_property(np
, "ram-type", NULL
);
184 seq_printf(m
, " %s", pp
);
189 /* Indicate newworld/oldworld */
190 seq_printf(m
, "pmac-generation\t: %s\n",
191 pmac_newworld
? "NewWorld" : "OldWorld");
194 #ifndef CONFIG_ADB_CUDA
195 int find_via_cuda(void)
197 if (!find_devices("via-cuda"))
199 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
200 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
205 #ifndef CONFIG_ADB_PMU
206 int find_via_pmu(void)
208 if (!find_devices("via-pmu"))
210 printk("WARNING ! Your machine is PMU-based but your kernel\n");
211 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
216 #ifndef CONFIG_PMAC_SMU
219 /* should check and warn if SMU is present */
225 static volatile u32
*sysctrl_regs
;
227 static void __init
ohare_init(void)
229 /* this area has the CPU identification register
230 and some registers used by smp boards */
231 sysctrl_regs
= (volatile u32
*) ioremap(0xf8000000, 0x1000);
234 * Turn on the L2 cache.
235 * We assume that we have a PSX memory controller iff
236 * we have an ohare I/O controller.
238 if (find_devices("ohare") != NULL
) {
239 if (((sysctrl_regs
[2] >> 24) & 0xf) >= 3) {
240 if (sysctrl_regs
[4] & 0x10)
241 sysctrl_regs
[4] |= 0x04000020;
243 sysctrl_regs
[4] |= 0x04000000;
245 printk(KERN_INFO
"Level 2 cache enabled\n");
250 static void __init
l2cr_init(void)
252 /* Checks "l2cr-value" property in the registry */
253 if (cpu_has_feature(CPU_FTR_L2CR
)) {
254 struct device_node
*np
= find_devices("cpus");
256 np
= find_type_devices("cpu");
258 unsigned int *l2cr
= (unsigned int *)
259 get_property(np
, "l2cr-value", NULL
);
261 ppc_override_l2cr
= 1;
262 ppc_override_l2cr_value
= *l2cr
;
264 _set_L2CR(ppc_override_l2cr_value
);
269 if (ppc_override_l2cr
)
270 printk(KERN_INFO
"L2CR overridden (0x%x), "
271 "backside cache is %s\n",
272 ppc_override_l2cr_value
,
273 (ppc_override_l2cr_value
& 0x80000000)
274 ? "enabled" : "disabled");
278 static void __init
pmac_setup_arch(void)
280 struct device_node
*cpu
, *ic
;
284 pvr
= PVR_VER(mfspr(SPRN_PVR
));
286 /* Set loops_per_jiffy to a half-way reasonable value,
287 for use until calibrate_delay gets called. */
288 loops_per_jiffy
= 50000000 / HZ
;
289 cpu
= of_find_node_by_type(NULL
, "cpu");
291 fp
= (int *) get_property(cpu
, "clock-frequency", NULL
);
293 if (pvr
>= 0x30 && pvr
< 0x80)
295 loops_per_jiffy
= *fp
/ (3 * HZ
);
296 else if (pvr
== 4 || pvr
>= 8)
297 /* 604, G3, G4 etc. */
298 loops_per_jiffy
= *fp
/ HZ
;
301 loops_per_jiffy
= *fp
/ (2 * HZ
);
306 /* See if newworld or oldworld */
307 for (ic
= NULL
; (ic
= of_find_all_nodes(ic
)) != NULL
; )
308 if (get_property(ic
, "interrupt-controller", NULL
))
315 /* Lookup PCI hosts */
321 #endif /* CONFIG_PPC32 */
331 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
336 #ifdef CONFIG_BLK_DEV_INITRD
338 ROOT_DEV
= Root_RAM0
;
341 ROOT_DEV
= DEFAULT_ROOT_DEVICE
;
345 /* Check for Core99 */
346 if (find_devices("uni-n") || find_devices("u3") || find_devices("u4"))
347 smp_ops
= &core99_smp_ops
;
350 smp_ops
= &psurge_smp_ops
;
352 #endif /* CONFIG_SMP */
355 if (strstr(cmd_line
, "adb_sync")) {
356 extern int __adb_probe_sync
;
357 __adb_probe_sync
= 1;
359 #endif /* CONFIG_ADB */
367 extern dev_t boot_dev
;
370 void __init
note_scsi_host(struct device_node
*node
, void *host
)
375 l
= strlen(node
->full_name
);
376 if (bootpath
!= NULL
&& bootdevice
!= NULL
377 && strncmp(node
->full_name
, bootdevice
, l
) == 0
378 && (bootdevice
[l
] == '/' || bootdevice
[l
] == 0)) {
381 * There's a bug in OF 1.0.5. (Why am I not surprised.)
382 * If you pass a path like scsi/sd@1:0 to canon, it returns
383 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
384 * That is, the scsi target number doesn't get preserved.
385 * So we pick the target number out of bootpath and use that.
387 p
= strstr(bootpath
, "/sd@");
390 boot_target
= simple_strtoul(p
, NULL
, 10);
393 boot_part
= simple_strtoul(p
+ 1, NULL
, 10);
397 EXPORT_SYMBOL(note_scsi_host
);
400 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
401 static dev_t __init
find_ide_boot(void)
405 dev_t __init
pmac_find_ide_boot(char *bootdevice
, int n
);
407 if (bootdevice
== NULL
)
409 p
= strrchr(bootdevice
, '/');
414 return pmac_find_ide_boot(bootdevice
, n
);
416 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
418 static void __init
find_boot_device(void)
420 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
421 boot_dev
= find_ide_boot();
425 /* TODO: Merge the suspend-to-ram with the common code !!!
426 * currently, this is a stub implementation for suspend-to-disk
430 #ifdef CONFIG_SOFTWARE_SUSPEND
432 static int pmac_pm_prepare(suspend_state_t state
)
434 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
439 static int pmac_pm_enter(suspend_state_t state
)
441 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
443 /* Giveup the lazy FPU & vec so we don't have to back them
444 * up from the low level code
448 #ifdef CONFIG_ALTIVEC
449 if (cur_cpu_spec
->cpu_features
& CPU_FTR_ALTIVEC
)
450 enable_kernel_altivec();
451 #endif /* CONFIG_ALTIVEC */
456 static int pmac_pm_finish(suspend_state_t state
)
458 printk(KERN_DEBUG
"%s(%d)\n", __FUNCTION__
, state
);
460 /* Restore userland MMU context */
461 set_context(current
->active_mm
->context
, current
->active_mm
->pgd
);
466 static struct pm_ops pmac_pm_ops
= {
467 .pm_disk_mode
= PM_DISK_SHUTDOWN
,
468 .prepare
= pmac_pm_prepare
,
469 .enter
= pmac_pm_enter
,
470 .finish
= pmac_pm_finish
,
473 #endif /* CONFIG_SOFTWARE_SUSPEND */
475 static int initializing
= 1;
477 static int pmac_late_init(void)
480 #ifdef CONFIG_SOFTWARE_SUSPEND
481 pm_set_ops(&pmac_pm_ops
);
482 #endif /* CONFIG_SOFTWARE_SUSPEND */
486 late_initcall(pmac_late_init
);
488 /* can't be __init - can be called whenever a disk is first accessed */
489 void note_bootable_part(dev_t dev
, int part
, int goodness
)
491 static int found_boot
= 0;
496 if ((goodness
<= current_root_goodness
) &&
497 ROOT_DEV
!= DEFAULT_ROOT_DEVICE
)
499 p
= strstr(saved_command_line
, "root=");
500 if (p
!= NULL
&& (p
== saved_command_line
|| p
[-1] == ' '))
507 if (!boot_dev
|| dev
== boot_dev
) {
508 ROOT_DEV
= dev
+ part
;
510 current_root_goodness
= goodness
;
514 #ifdef CONFIG_ADB_CUDA
515 static void cuda_restart(void)
517 struct adb_request req
;
519 cuda_request(&req
, NULL
, 2, CUDA_PACKET
, CUDA_RESET_SYSTEM
);
524 static void cuda_shutdown(void)
526 struct adb_request req
;
528 cuda_request(&req
, NULL
, 2, CUDA_PACKET
, CUDA_POWERDOWN
);
534 #define cuda_restart()
535 #define cuda_shutdown()
538 #ifndef CONFIG_ADB_PMU
539 #define pmu_restart()
540 #define pmu_shutdown()
543 #ifndef CONFIG_PMAC_SMU
544 #define smu_restart()
545 #define smu_shutdown()
548 static void pmac_restart(char *cmd
)
550 switch (sys_ctrler
) {
551 case SYS_CTRLER_CUDA
:
564 static void pmac_power_off(void)
566 switch (sys_ctrler
) {
567 case SYS_CTRLER_CUDA
:
587 * Early initialization.
589 static void __init
pmac_init_early(void)
592 /* Initialize hash table, from now on, we can take hash faults
598 /* Enable early btext debug if requested */
599 if (strstr(cmd_line
, "btextdbg")) {
600 udbg_adb_init_early();
601 register_early_udbg_console();
604 /* Probe motherboard chipset */
607 /* Initialize debug stuff */
608 udbg_scc_init(!!strstr(cmd_line
, "sccdbg"));
609 udbg_adb_init(!!strstr(cmd_line
, "btextdbg"));
612 /* Setup interrupt mapping options */
613 ppc64_interrupt_controller
= IC_OPEN_PIC
;
615 iommu_init_early_dart();
620 * pmac has no legacy IO, anything calling this function has to
621 * fail or bad things will happen
623 static int pmac_check_legacy_ioport(unsigned int baseport
)
628 static int __init
pmac_declare_of_platform_devices(void)
630 struct device_node
*np
;
632 if (machine_is(chrp
))
635 if (!machine_is(powermac
))
638 np
= of_find_node_by_name(NULL
, "valkyrie");
640 of_platform_device_create(np
, "valkyrie", NULL
);
641 np
= of_find_node_by_name(NULL
, "platinum");
643 of_platform_device_create(np
, "platinum", NULL
);
644 np
= of_find_node_by_type(NULL
, "smu");
646 of_platform_device_create(np
, "smu", NULL
);
653 device_initcall(pmac_declare_of_platform_devices
);
656 * Called very early, MMU is off, device-tree isn't unflattened
658 static int __init
pmac_probe(void)
660 unsigned long root
= of_get_flat_dt_root();
662 if (!of_flat_dt_is_compatible(root
, "Power Macintosh") &&
663 !of_flat_dt_is_compatible(root
, "MacRISC"))
668 * On U3, the DART (iommu) must be allocated now since it
669 * has an impact on htab_initialize (due to the large page it
670 * occupies having to be broken up so the DART itself is not
671 * part of the cacheable linar mapping
677 /* isa_io_base gets set in pmac_pci_init */
678 isa_mem_base
= PMAC_ISA_MEM_BASE
;
679 pci_dram_offset
= PMAC_PCI_DRAM_OFFSET
;
680 ISA_DMA_THRESHOLD
= ~0L;
684 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
685 #ifdef CONFIG_BLK_DEV_IDE_PMAC
686 ppc_ide_md
.ide_init_hwif
= pmac_ide_init_hwif_ports
;
687 ppc_ide_md
.default_io_base
= pmac_ide_get_base
;
688 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
689 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
691 #endif /* CONFIG_PPC32 */
693 #ifdef CONFIG_PMAC_SMU
695 * SMU based G5s need some memory below 2Gb, at least the current
696 * driver needs that. We have to allocate it now. We allocate 4k
697 * (1 small page) for now.
699 smu_cmdbuf_abs
= lmb_alloc_base(4096, 4096, 0x80000000UL
);
700 #endif /* CONFIG_PMAC_SMU */
706 /* Move that to pci.c */
707 static int pmac_pci_probe_mode(struct pci_bus
*bus
)
709 struct device_node
*node
= bus
->sysdata
;
711 /* We need to use normal PCI probing for the AGP bus,
712 * since the device for the AGP bridge isn't in the tree.
714 if (bus
->self
== NULL
&& (device_is_compatible(node
, "u3-agp") ||
715 device_is_compatible(node
, "u4-pcie")))
716 return PCI_PROBE_NORMAL
;
717 return PCI_PROBE_DEVTREE
;
721 define_machine(powermac
) {
724 .setup_arch
= pmac_setup_arch
,
725 .init_early
= pmac_init_early
,
726 .show_cpuinfo
= pmac_show_cpuinfo
,
727 .init_IRQ
= pmac_pic_init
,
728 .get_irq
= NULL
, /* changed later */
729 .pcibios_fixup
= pmac_pcibios_fixup
,
730 .restart
= pmac_restart
,
731 .power_off
= pmac_power_off
,
733 .time_init
= pmac_time_init
,
734 .get_boot_time
= pmac_get_boot_time
,
735 .set_rtc_time
= pmac_set_rtc_time
,
736 .get_rtc_time
= pmac_get_rtc_time
,
737 .calibrate_decr
= pmac_calibrate_decr
,
738 .feature_call
= pmac_do_feature_call
,
739 .check_legacy_ioport
= pmac_check_legacy_ioport
,
740 .progress
= udbg_progress
,
742 .pci_probe_mode
= pmac_pci_probe_mode
,
743 .power_save
= power4_idle
,
744 .enable_pmcs
= power4_enable_pmcs
,
746 .machine_kexec
= default_machine_kexec
,
747 .machine_kexec_prepare
= default_machine_kexec_prepare
,
748 .machine_crash_shutdown
= default_machine_crash_shutdown
,
750 #endif /* CONFIG_PPC64 */
752 .pcibios_enable_device_hook
= pmac_pci_enable_device_hook
,
753 .pcibios_after_init
= pmac_pcibios_after_init
,
754 .phys_mem_access_prot
= pci_phys_mem_access_prot
,
756 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
757 .cpu_die
= generic_mach_cpu_die
,