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>
84 #undef SHOW_GATWICK_IRQS
86 unsigned char drive_info;
88 int ppc_override_l2cr = 0;
89 int ppc_override_l2cr_value;
92 int pmac_newworld = 1;
94 static int current_root_goodness = -1;
96 extern int pmac_newworld;
97 extern struct machdep_calls pmac_md;
99 #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
102 #include <asm/udbg.h>
106 extern void zs_kgdb_hook(int tty_num);
108 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
109 EXPORT_SYMBOL(sys_ctrler);
111 #ifdef CONFIG_PMAC_SMU
112 unsigned long smu_cmdbuf_abs;
113 EXPORT_SYMBOL(smu_cmdbuf_abs);
117 extern struct smp_ops_t psurge_smp_ops;
118 extern struct smp_ops_t core99_smp_ops;
119 #endif /* CONFIG_SMP */
121 static void pmac_show_cpuinfo(struct seq_file *m)
123 struct device_node *np;
127 unsigned int mbflags;
130 mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
131 PMAC_MB_INFO_MODEL, 0);
132 mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
133 PMAC_MB_INFO_FLAGS, 0);
134 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
135 (long) &mbname) != 0)
138 /* find motherboard type */
139 seq_printf(m, "machine\t\t: ");
140 np = of_find_node_by_path("/");
142 pp = (char *) get_property(np, "model", NULL);
144 seq_printf(m, "%s\n", pp);
146 seq_printf(m, "PowerMac\n");
147 pp = (char *) get_property(np, "compatible", &plen);
149 seq_printf(m, "motherboard\t:");
151 int l = strlen(pp) + 1;
152 seq_printf(m, " %s", pp);
160 seq_printf(m, "PowerMac\n");
162 /* print parsed model */
163 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
164 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
166 /* find l2 cache info */
167 np = of_find_node_by_name(NULL, "l2-cache");
169 np = of_find_node_by_type(NULL, "cache");
171 unsigned int *ic = (unsigned int *)
172 get_property(np, "i-cache-size", NULL);
173 unsigned int *dc = (unsigned int *)
174 get_property(np, "d-cache-size", NULL);
175 seq_printf(m, "L2 cache\t:");
177 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
178 seq_printf(m, " %dK unified", *dc / 1024);
181 seq_printf(m, " %dK instruction", *ic / 1024);
183 seq_printf(m, "%s %dK data",
184 (ic? " +": ""), *dc / 1024);
186 pp = get_property(np, "ram-type", NULL);
188 seq_printf(m, " %s", pp);
193 /* Indicate newworld/oldworld */
194 seq_printf(m, "pmac-generation\t: %s\n",
195 pmac_newworld ? "NewWorld" : "OldWorld");
198 #ifndef CONFIG_ADB_CUDA
199 int find_via_cuda(void)
201 if (!find_devices("via-cuda"))
203 printk("WARNING ! Your machine is CUDA-based but your kernel\n");
204 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
209 #ifndef CONFIG_ADB_PMU
210 int find_via_pmu(void)
212 if (!find_devices("via-pmu"))
214 printk("WARNING ! Your machine is PMU-based but your kernel\n");
215 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
220 #ifndef CONFIG_PMAC_SMU
223 /* should check and warn if SMU is present */
229 static volatile u32 *sysctrl_regs;
231 static void __init ohare_init(void)
233 /* this area has the CPU identification register
234 and some registers used by smp boards */
235 sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
238 * Turn on the L2 cache.
239 * We assume that we have a PSX memory controller iff
240 * we have an ohare I/O controller.
242 if (find_devices("ohare") != NULL) {
243 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
244 if (sysctrl_regs[4] & 0x10)
245 sysctrl_regs[4] |= 0x04000020;
247 sysctrl_regs[4] |= 0x04000000;
249 printk(KERN_INFO "Level 2 cache enabled\n");
254 static void __init l2cr_init(void)
256 /* Checks "l2cr-value" property in the registry */
257 if (cpu_has_feature(CPU_FTR_L2CR)) {
258 struct device_node *np = find_devices("cpus");
260 np = find_type_devices("cpu");
262 unsigned int *l2cr = (unsigned int *)
263 get_property(np, "l2cr-value", NULL);
265 ppc_override_l2cr = 1;
266 ppc_override_l2cr_value = *l2cr;
268 _set_L2CR(ppc_override_l2cr_value);
273 if (ppc_override_l2cr)
274 printk(KERN_INFO "L2CR overridden (0x%x), "
275 "backside cache is %s\n",
276 ppc_override_l2cr_value,
277 (ppc_override_l2cr_value & 0x80000000)
278 ? "enabled" : "disabled");
282 void __init pmac_setup_arch(void)
284 struct device_node *cpu, *ic;
288 pvr = PVR_VER(mfspr(SPRN_PVR));
290 /* Set loops_per_jiffy to a half-way reasonable value,
291 for use until calibrate_delay gets called. */
292 loops_per_jiffy = 50000000 / HZ;
293 cpu = of_find_node_by_type(NULL, "cpu");
295 fp = (int *) get_property(cpu, "clock-frequency", NULL);
297 if (pvr >= 0x30 && pvr < 0x80)
299 loops_per_jiffy = *fp / (3 * HZ);
300 else if (pvr == 4 || pvr >= 8)
301 /* 604, G3, G4 etc. */
302 loops_per_jiffy = *fp / HZ;
305 loops_per_jiffy = *fp / (2 * HZ);
310 /* See if newworld or oldworld */
311 for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
312 if (get_property(ic, "interrupt-controller", NULL))
314 pmac_newworld = (ic != NULL);
318 /* Lookup PCI hosts */
324 #endif /* CONFIG_PPC32 */
334 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
339 #ifdef CONFIG_BLK_DEV_INITRD
341 ROOT_DEV = Root_RAM0;
344 ROOT_DEV = DEFAULT_ROOT_DEVICE;
348 /* Check for Core99 */
349 if (find_devices("uni-n") || find_devices("u3"))
350 smp_ops = &core99_smp_ops;
353 smp_ops = &psurge_smp_ops;
355 #endif /* CONFIG_SMP */
363 extern dev_t boot_dev;
366 void __init note_scsi_host(struct device_node *node, void *host)
371 l = strlen(node->full_name);
372 if (bootpath != NULL && bootdevice != NULL
373 && strncmp(node->full_name, bootdevice, l) == 0
374 && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
377 * There's a bug in OF 1.0.5. (Why am I not surprised.)
378 * If you pass a path like scsi/sd@1:0 to canon, it returns
379 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
380 * That is, the scsi target number doesn't get preserved.
381 * So we pick the target number out of bootpath and use that.
383 p = strstr(bootpath, "/sd@");
386 boot_target = simple_strtoul(p, NULL, 10);
389 boot_part = simple_strtoul(p + 1, NULL, 10);
393 EXPORT_SYMBOL(note_scsi_host);
396 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
397 static dev_t __init find_ide_boot(void)
401 dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
403 if (bootdevice == NULL)
405 p = strrchr(bootdevice, '/');
410 return pmac_find_ide_boot(bootdevice, n);
412 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
414 static void __init find_boot_device(void)
416 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
417 boot_dev = find_ide_boot();
421 /* TODO: Merge the suspend-to-ram with the common code !!!
422 * currently, this is a stub implementation for suspend-to-disk
426 #ifdef CONFIG_SOFTWARE_SUSPEND
428 static int pmac_pm_prepare(suspend_state_t state)
430 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
435 static int pmac_pm_enter(suspend_state_t state)
437 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
439 /* Giveup the lazy FPU & vec so we don't have to back them
440 * up from the low level code
444 #ifdef CONFIG_ALTIVEC
445 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
446 enable_kernel_altivec();
447 #endif /* CONFIG_ALTIVEC */
452 static int pmac_pm_finish(suspend_state_t state)
454 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
456 /* Restore userland MMU context */
457 set_context(current->active_mm->context, current->active_mm->pgd);
462 static struct pm_ops pmac_pm_ops = {
463 .pm_disk_mode = PM_DISK_SHUTDOWN,
464 .prepare = pmac_pm_prepare,
465 .enter = pmac_pm_enter,
466 .finish = pmac_pm_finish,
469 #endif /* CONFIG_SOFTWARE_SUSPEND */
471 static int initializing = 1;
473 static int pmac_late_init(void)
476 #ifdef CONFIG_SOFTWARE_SUSPEND
477 pm_set_ops(&pmac_pm_ops);
478 #endif /* CONFIG_SOFTWARE_SUSPEND */
482 late_initcall(pmac_late_init);
484 /* can't be __init - can be called whenever a disk is first accessed */
485 void note_bootable_part(dev_t dev, int part, int goodness)
487 static int found_boot = 0;
492 if ((goodness <= current_root_goodness) &&
493 ROOT_DEV != DEFAULT_ROOT_DEVICE)
495 p = strstr(saved_command_line, "root=");
496 if (p != NULL && (p == saved_command_line || p[-1] == ' '))
503 if (!boot_dev || dev == boot_dev) {
504 ROOT_DEV = dev + part;
506 current_root_goodness = goodness;
510 #ifdef CONFIG_ADB_CUDA
511 static void cuda_restart(void)
513 struct adb_request req;
515 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
520 static void cuda_shutdown(void)
522 struct adb_request req;
524 cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
530 #define cuda_restart()
531 #define cuda_shutdown()
534 #ifndef CONFIG_ADB_PMU
535 #define pmu_restart()
536 #define pmu_shutdown()
539 #ifndef CONFIG_PMAC_SMU
540 #define smu_restart()
541 #define smu_shutdown()
544 static void pmac_restart(char *cmd)
546 switch (sys_ctrler) {
547 case SYS_CTRLER_CUDA:
560 static void pmac_power_off(void)
562 switch (sys_ctrler) {
563 case SYS_CTRLER_CUDA:
583 void __init pmac_init(void)
585 /* isa_io_base gets set in pmac_pci_init */
586 isa_mem_base = PMAC_ISA_MEM_BASE;
587 pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
588 ISA_DMA_THRESHOLD = ~0L;
594 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
595 #ifdef CONFIG_BLK_DEV_IDE_PMAC
596 ppc_ide_md.ide_init_hwif = pmac_ide_init_hwif_ports;
597 ppc_ide_md.default_io_base = pmac_ide_get_base;
598 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
599 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
601 if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
607 * Early initialization.
609 static void __init pmac_init_early(void)
612 /* Initialize hash table, from now on, we can take hash faults
618 /* Enable early btext debug if requested */
619 if (strstr(cmd_line, "btextdbg")) {
620 udbg_adb_init_early();
621 register_early_udbg_console();
624 /* Probe motherboard chipset */
629 printk(KERN_INFO "Using native/NAP idle loop\n");
631 /* Initialize debug stuff */
632 udbg_scc_init(!!strstr(cmd_line, "sccdbg"));
633 udbg_adb_init(!!strstr(cmd_line, "btextdbg"));
636 /* Setup interrupt mapping options */
637 ppc64_interrupt_controller = IC_OPEN_PIC;
639 iommu_init_early_u3();
643 static void __init pmac_progress(char *s, unsigned short hex)
650 * pmac has no legacy IO, anything calling this function has to
651 * fail or bad things will happen
653 static int pmac_check_legacy_ioport(unsigned int baseport)
658 static int __init pmac_declare_of_platform_devices(void)
660 struct device_node *np, *npp;
662 np = find_devices("uni-n");
664 for (np = np->child; np != NULL; np = np->sibling)
665 if (strncmp(np->name, "i2c", 3) == 0) {
666 of_platform_device_create(np, "uni-n-i2c",
671 np = find_devices("valkyrie");
673 of_platform_device_create(np, "valkyrie", NULL);
674 np = find_devices("platinum");
676 of_platform_device_create(np, "platinum", NULL);
678 npp = of_find_node_by_name(NULL, "u3");
680 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
681 if (strncmp(np->name, "i2c", 3) == 0) {
682 of_platform_device_create(np, "u3-i2c", NULL);
689 np = of_find_node_by_type(NULL, "smu");
691 of_platform_device_create(np, "smu", NULL);
698 device_initcall(pmac_declare_of_platform_devices);
701 * Called very early, MMU is off, device-tree isn't unflattened
703 static int __init pmac_probe(int platform)
706 if (platform != PLATFORM_POWERMAC)
710 * On U3, the DART (iommu) must be allocated now since it
711 * has an impact on htab_initialize (due to the large page it
712 * occupies having to be broken up so the DART itself is not
713 * part of the cacheable linar mapping
715 alloc_u3_dart_table();
718 #ifdef CONFIG_PMAC_SMU
720 * SMU based G5s need some memory below 2Gb, at least the current
721 * driver needs that. We have to allocate it now. We allocate 4k
722 * (1 small page) for now.
724 smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
725 #endif /* CONFIG_PMAC_SMU */
731 /* Move that to pci.c */
732 static int pmac_pci_probe_mode(struct pci_bus *bus)
734 struct device_node *node = bus->sysdata;
736 /* We need to use normal PCI probing for the AGP bus,
737 since the device for the AGP bridge isn't in the tree. */
738 if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
739 return PCI_PROBE_NORMAL;
741 return PCI_PROBE_DEVTREE;
745 struct machdep_calls __initdata pmac_md = {
746 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
747 .cpu_die = generic_mach_cpu_die,
750 .setup_arch = pmac_setup_arch,
751 .init_early = pmac_init_early,
752 .show_cpuinfo = pmac_show_cpuinfo,
753 .init_IRQ = pmac_pic_init,
754 .get_irq = mpic_get_irq, /* changed later */
755 .pcibios_fixup = pmac_pcibios_fixup,
756 .restart = pmac_restart,
757 .power_off = pmac_power_off,
759 .time_init = pmac_time_init,
760 .get_boot_time = pmac_get_boot_time,
761 .set_rtc_time = pmac_set_rtc_time,
762 .get_rtc_time = pmac_get_rtc_time,
763 .calibrate_decr = pmac_calibrate_decr,
764 .feature_call = pmac_do_feature_call,
765 .check_legacy_ioport = pmac_check_legacy_ioport,
766 .progress = pmac_progress,
768 .pci_probe_mode = pmac_pci_probe_mode,
769 .idle_loop = native_idle,
770 .enable_pmcs = power4_enable_pmcs,
772 .machine_kexec = default_machine_kexec,
773 .machine_kexec_prepare = default_machine_kexec_prepare,
775 #endif /* CONFIG_PPC64 */
777 .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
778 .pcibios_after_init = pmac_pcibios_after_init,
779 .phys_mem_access_prot = pci_phys_mem_access_prot,