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..
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/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/pci-bridge.h>
63 #include <asm/ohare.h>
64 #include <asm/mediabay.h>
65 #include <asm/machdep.h>
67 #include <asm/bootx.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>
76 #include "mem_pieces.h"
78 #undef SHOW_GATWICK_IRQS
80 extern long pmac_time_init(void);
81 extern unsigned long pmac_get_rtc_time(void);
82 extern int pmac_set_rtc_time(unsigned long nowtime);
83 extern void pmac_read_rtc_time(void);
84 extern void pmac_calibrate_decr(void);
85 extern void pmac_pcibios_fixup(void);
86 extern void pmac_find_bridges(void);
87 extern unsigned long pmac_ide_get_base(int index);
88 extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
89 unsigned long data_port, unsigned long ctrl_port, int *irq);
91 extern void pmac_nvram_update(void);
92 extern unsigned char pmac_nvram_read_byte(int addr);
93 extern void pmac_nvram_write_byte(int addr, unsigned char val);
94 extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
95 extern void pmac_pcibios_after_init(void);
96 extern int of_show_percpuinfo(struct seq_file *m, int i);
98 struct device_node *memory_node;
100 unsigned char drive_info;
102 int ppc_override_l2cr = 0;
103 int ppc_override_l2cr_value;
106 static int current_root_goodness = -1;
108 extern int pmac_newworld;
110 #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
112 extern void zs_kgdb_hook(int tty_num);
113 static void ohare_init(void);
114 #ifdef CONFIG_BOOTX_TEXT
115 static void pmac_progress(char *s, unsigned short hex);
118 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
121 extern struct smp_ops_t psurge_smp_ops;
122 extern struct smp_ops_t core99_smp_ops;
123 #endif /* CONFIG_SMP */
126 pmac_show_cpuinfo(struct seq_file *m)
128 struct device_node *np;
131 int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
132 NULL, PMAC_MB_INFO_MODEL, 0);
133 unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
134 NULL, PMAC_MB_INFO_FLAGS, 0);
137 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
140 /* find motherboard type */
141 seq_printf(m, "machine\t\t: ");
142 np = find_devices("device-tree");
144 pp = (char *) get_property(np, "model", NULL);
146 seq_printf(m, "%s\n", pp);
148 seq_printf(m, "PowerMac\n");
149 pp = (char *) get_property(np, "compatible", &plen);
151 seq_printf(m, "motherboard\t:");
153 int l = strlen(pp) + 1;
154 seq_printf(m, " %s", pp);
161 seq_printf(m, "PowerMac\n");
163 /* print parsed model */
164 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
165 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
167 /* find l2 cache info */
168 np = find_devices("l2-cache");
170 np = find_type_devices("cache");
172 unsigned int *ic = (unsigned int *)
173 get_property(np, "i-cache-size", NULL);
174 unsigned int *dc = (unsigned int *)
175 get_property(np, "d-cache-size", NULL);
176 seq_printf(m, "L2 cache\t:");
178 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
179 seq_printf(m, " %dK unified", *dc / 1024);
182 seq_printf(m, " %dK instruction", *ic / 1024);
184 seq_printf(m, "%s %dK data",
185 (ic? " +": ""), *dc / 1024);
187 pp = get_property(np, "ram-type", NULL);
189 seq_printf(m, " %s", pp);
194 np = find_devices("memory");
197 struct reg_property *reg = (struct reg_property *)
198 get_property(np, "reg", &n);
201 unsigned long total = 0;
203 for (n /= sizeof(struct reg_property); n > 0; --n)
204 total += (reg++)->size;
205 seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
209 /* Checks "l2cr-value" property in the registry */
210 np = find_devices("cpus");
212 np = find_type_devices("cpu");
214 unsigned int *l2cr = (unsigned int *)
215 get_property(np, "l2cr-value", NULL);
217 seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
221 /* Indicate newworld/oldworld */
222 seq_printf(m, "pmac-generation\t: %s\n",
223 pmac_newworld ? "NewWorld" : "OldWorld");
230 pmac_show_percpuinfo(struct seq_file *m, int i)
232 #ifdef CONFIG_CPU_FREQ_PMAC
233 extern unsigned int pmac_get_one_cpufreq(int i);
234 unsigned int freq = pmac_get_one_cpufreq(i);
236 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
239 #endif /* CONFIG_CPU_FREQ_PMAC */
240 return of_show_percpuinfo(m, i);
243 static volatile u32 *sysctrl_regs;
246 pmac_setup_arch(void)
248 struct device_node *cpu;
252 pvr = PVR_VER(mfspr(SPRN_PVR));
254 /* Set loops_per_jiffy to a half-way reasonable value,
255 for use until calibrate_delay gets called. */
256 cpu = find_type_devices("cpu");
258 fp = (int *) get_property(cpu, "clock-frequency", NULL);
260 if (pvr == 4 || pvr >= 8)
261 /* 604, G3, G4 etc. */
262 loops_per_jiffy = *fp / HZ;
265 loops_per_jiffy = *fp / (2*HZ);
267 loops_per_jiffy = 50000000 / HZ;
270 /* this area has the CPU identification register
271 and some registers used by smp boards */
272 sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
275 /* Lookup PCI hosts */
278 /* Checks "l2cr-value" property in the registry */
279 if (cpu_has_feature(CPU_FTR_L2CR)) {
280 struct device_node *np = find_devices("cpus");
282 np = find_type_devices("cpu");
284 unsigned int *l2cr = (unsigned int *)
285 get_property(np, "l2cr-value", NULL);
287 ppc_override_l2cr = 1;
288 ppc_override_l2cr_value = *l2cr;
290 _set_L2CR(ppc_override_l2cr_value);
295 if (ppc_override_l2cr)
296 printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
297 ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
298 ? "enabled" : "disabled");
304 #ifdef CONFIG_ADB_CUDA
307 if (find_devices("via-cuda")) {
308 printk("WARNING ! Your machine is Cuda based but your kernel\n");
309 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
312 #ifdef CONFIG_ADB_PMU
315 if (find_devices("via-pmu")) {
316 printk("WARNING ! Your machine is PMU based but your kernel\n");
317 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
323 #ifdef CONFIG_BLK_DEV_INITRD
325 ROOT_DEV = Root_RAM0;
328 ROOT_DEV = DEFAULT_ROOT_DEVICE;
331 /* Check for Core99 */
332 if (find_devices("uni-n") || find_devices("u3"))
333 smp_ops = &core99_smp_ops;
335 smp_ops = &psurge_smp_ops;
336 #endif /* CONFIG_SMP */
338 pci_create_OF_bus_map();
341 static void __init ohare_init(void)
344 * Turn on the L2 cache.
345 * We assume that we have a PSX memory controller iff
346 * we have an ohare I/O controller.
348 if (find_devices("ohare") != NULL) {
349 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
350 if (sysctrl_regs[4] & 0x10)
351 sysctrl_regs[4] |= 0x04000020;
353 sysctrl_regs[4] |= 0x04000000;
355 printk(KERN_INFO "Level 2 cache enabled\n");
360 extern char *bootpath;
361 extern char *bootdevice;
365 extern dev_t boot_dev;
369 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);
398 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
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 */
418 find_boot_device(void)
420 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
421 boot_dev = find_ide_boot();
425 static int initializing = 1;
426 /* TODO: Merge the suspend-to-ram with the common code !!!
427 * currently, this is a stub implementation for suspend-to-disk
431 #ifdef CONFIG_SOFTWARE_SUSPEND
433 static int pmac_pm_prepare(suspend_state_t state)
435 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
440 static int pmac_pm_enter(suspend_state_t state)
442 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
444 /* Giveup the lazy FPU & vec so we don't have to back them
445 * up from the low level code
449 #ifdef CONFIG_ALTIVEC
450 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
451 enable_kernel_altivec();
452 #endif /* CONFIG_ALTIVEC */
457 static int pmac_pm_finish(suspend_state_t state)
459 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
461 /* Restore userland MMU context */
462 set_context(current->active_mm->context, current->active_mm->pgd);
467 static struct pm_ops pmac_pm_ops = {
468 .pm_disk_mode = PM_DISK_SHUTDOWN,
469 .prepare = pmac_pm_prepare,
470 .enter = pmac_pm_enter,
471 .finish = pmac_pm_finish,
474 #endif /* CONFIG_SOFTWARE_SUSPEND */
476 static int pmac_late_init(void)
479 #ifdef CONFIG_SOFTWARE_SUSPEND
480 pm_set_ops(&pmac_pm_ops);
481 #endif /* CONFIG_SOFTWARE_SUSPEND */
485 late_initcall(pmac_late_init);
487 /* can't be __init - can be called whenever a disk is first accessed */
489 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;
515 pmac_restart(char *cmd)
517 #ifdef CONFIG_ADB_CUDA
518 struct adb_request req;
519 #endif /* CONFIG_ADB_CUDA */
521 switch (sys_ctrler) {
522 #ifdef CONFIG_ADB_CUDA
523 case SYS_CTRLER_CUDA:
524 cuda_request(&req, NULL, 2, CUDA_PACKET,
529 #endif /* CONFIG_ADB_CUDA */
530 #ifdef CONFIG_ADB_PMU
534 #endif /* CONFIG_ADB_PMU */
542 #ifdef CONFIG_ADB_CUDA
543 struct adb_request req;
544 #endif /* CONFIG_ADB_CUDA */
546 switch (sys_ctrler) {
547 #ifdef CONFIG_ADB_CUDA
548 case SYS_CTRLER_CUDA:
549 cuda_request(&req, NULL, 2, CUDA_PACKET,
554 #endif /* CONFIG_ADB_CUDA */
555 #ifdef CONFIG_ADB_PMU
559 #endif /* CONFIG_ADB_PMU */
571 * Read in a property describing some pieces of memory.
575 get_mem_prop(char *name, struct mem_pieces *mp)
577 struct reg_property *rp;
580 int nac = prom_n_addr_cells(memory_node);
581 int nsc = prom_n_size_cells(memory_node);
583 ip = (unsigned int *) get_property(memory_node, name, &s);
585 printk(KERN_ERR "error: couldn't get %s property on /memory\n",
589 s /= (nsc + nac) * 4;
591 for (i = 0; i < s; ++i, ip += nac+nsc) {
592 if (nac >= 2 && ip[nac-2] != 0)
594 rp->address = ip[nac-1];
595 if (nsc >= 2 && ip[nac+nsc-2] != 0)
598 rp->size = ip[nac+nsc-1];
601 mp->n_regions = rp - mp->regions;
603 /* Make sure the pieces are sorted. */
605 mem_pieces_coalesce(mp);
610 * On systems with Open Firmware, collect information about
611 * physical RAM and which pieces are already in use.
612 * At this point, we have (at least) the first 8MB mapped with a BAT.
613 * Our text, data, bss use something over 1MB, starting at 0.
614 * Open Firmware may be using 1MB at the 4MB point.
617 pmac_find_end_of_memory(void)
619 unsigned long a, total;
620 struct mem_pieces phys_mem;
623 * Find out where physical memory is, and check that it
624 * starts at 0 and is contiguous. It seems that RAM is
625 * always physically contiguous on Power Macintoshes.
627 * Supporting discontiguous physical memory isn't hard,
628 * it just makes the virtual <-> physical mapping functions
629 * more complicated (or else you end up wasting space
632 memory_node = find_devices("memory");
633 if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
634 || phys_mem.n_regions == 0)
636 a = phys_mem.regions[0].address;
638 panic("RAM doesn't start at physical address 0");
639 total = phys_mem.regions[0].size;
641 if (phys_mem.n_regions > 1) {
642 printk("RAM starting at 0x%x is not contiguous\n",
643 phys_mem.regions[1].address);
644 printk("Using RAM from 0 to 0x%lx\n", total-1);
651 pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
652 unsigned long r6, unsigned long r7)
654 /* isa_io_base gets set in pmac_find_bridges */
655 isa_mem_base = PMAC_ISA_MEM_BASE;
656 pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
657 ISA_DMA_THRESHOLD = ~0L;
661 ppc_md.setup_arch = pmac_setup_arch;
662 ppc_md.show_cpuinfo = pmac_show_cpuinfo;
663 ppc_md.show_percpuinfo = pmac_show_percpuinfo;
664 ppc_md.init_IRQ = pmac_pic_init;
665 ppc_md.get_irq = pmac_get_irq; /* Changed later on ... */
667 ppc_md.pcibios_fixup = pmac_pcibios_fixup;
668 ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
669 ppc_md.pcibios_after_init = pmac_pcibios_after_init;
670 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
672 ppc_md.restart = pmac_restart;
673 ppc_md.power_off = pmac_power_off;
674 ppc_md.halt = pmac_halt;
676 ppc_md.time_init = pmac_time_init;
677 ppc_md.set_rtc_time = pmac_set_rtc_time;
678 ppc_md.get_rtc_time = pmac_get_rtc_time;
679 ppc_md.calibrate_decr = pmac_calibrate_decr;
681 ppc_md.find_end_of_memory = pmac_find_end_of_memory;
683 ppc_md.feature_call = pmac_do_feature_call;
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 #ifdef CONFIG_BOOTX_TEXT
693 ppc_md.progress = pmac_progress;
694 #endif /* CONFIG_BOOTX_TEXT */
696 if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
700 #ifdef CONFIG_BOOTX_TEXT
702 pmac_progress(char *s, unsigned short hex)
704 if (boot_text_mapped) {
706 btext_drawchar('\n');
709 #endif /* CONFIG_BOOTX_TEXT */
712 pmac_declare_of_platform_devices(void)
714 struct device_node *np;
716 np = find_devices("uni-n");
718 for (np = np->child; np != NULL; np = np->sibling)
719 if (strncmp(np->name, "i2c", 3) == 0) {
720 of_platform_device_create(np, "uni-n-i2c",
725 np = find_devices("u3");
727 for (np = np->child; np != NULL; np = np->sibling)
728 if (strncmp(np->name, "i2c", 3) == 0) {
729 of_platform_device_create(np, "u3-i2c",
735 np = find_devices("valkyrie");
737 of_platform_device_create(np, "valkyrie", NULL);
738 np = find_devices("platinum");
740 of_platform_device_create(np, "platinum", NULL);
745 device_initcall(pmac_declare_of_platform_devices);