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/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/pci-bridge.h>
64 #include <asm/ohare.h>
65 #include <asm/mediabay.h>
66 #include <asm/machdep.h>
68 #include <asm/bootx.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>
77 #include "mem_pieces.h"
79 #undef SHOW_GATWICK_IRQS
81 extern long pmac_time_init(void);
82 extern unsigned long pmac_get_rtc_time(void);
83 extern int pmac_set_rtc_time(unsigned long nowtime);
84 extern void pmac_read_rtc_time(void);
85 extern void pmac_calibrate_decr(void);
86 extern void pmac_pcibios_fixup(void);
87 extern void pmac_find_bridges(void);
88 extern unsigned long pmac_ide_get_base(int index);
89 extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
90 unsigned long data_port, unsigned long ctrl_port, int *irq);
92 extern void pmac_nvram_update(void);
93 extern unsigned char pmac_nvram_read_byte(int addr);
94 extern void pmac_nvram_write_byte(int addr, unsigned char val);
95 extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
96 extern void pmac_pcibios_after_init(void);
97 extern int of_show_percpuinfo(struct seq_file *m, int i);
99 struct device_node *memory_node;
101 unsigned char drive_info;
103 int ppc_override_l2cr = 0;
104 int ppc_override_l2cr_value;
107 static int current_root_goodness = -1;
109 extern int pmac_newworld;
111 #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
113 extern void zs_kgdb_hook(int tty_num);
114 static void ohare_init(void);
115 #ifdef CONFIG_BOOTX_TEXT
116 static void pmac_progress(char *s, unsigned short hex);
119 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
122 extern struct smp_ops_t psurge_smp_ops;
123 extern struct smp_ops_t core99_smp_ops;
124 #endif /* CONFIG_SMP */
127 pmac_show_cpuinfo(struct seq_file *m)
129 struct device_node *np;
132 int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
133 NULL, PMAC_MB_INFO_MODEL, 0);
134 unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
135 NULL, PMAC_MB_INFO_FLAGS, 0);
138 if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
141 /* find motherboard type */
142 seq_printf(m, "machine\t\t: ");
143 np = find_devices("device-tree");
145 pp = (char *) get_property(np, "model", NULL);
147 seq_printf(m, "%s\n", pp);
149 seq_printf(m, "PowerMac\n");
150 pp = (char *) get_property(np, "compatible", &plen);
152 seq_printf(m, "motherboard\t:");
154 int l = strlen(pp) + 1;
155 seq_printf(m, " %s", pp);
162 seq_printf(m, "PowerMac\n");
164 /* print parsed model */
165 seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
166 seq_printf(m, "pmac flags\t: %08x\n", mbflags);
168 /* find l2 cache info */
169 np = find_devices("l2-cache");
171 np = find_type_devices("cache");
173 unsigned int *ic = (unsigned int *)
174 get_property(np, "i-cache-size", NULL);
175 unsigned int *dc = (unsigned int *)
176 get_property(np, "d-cache-size", NULL);
177 seq_printf(m, "L2 cache\t:");
179 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
180 seq_printf(m, " %dK unified", *dc / 1024);
183 seq_printf(m, " %dK instruction", *ic / 1024);
185 seq_printf(m, "%s %dK data",
186 (ic? " +": ""), *dc / 1024);
188 pp = get_property(np, "ram-type", NULL);
190 seq_printf(m, " %s", pp);
195 np = find_devices("memory");
198 struct reg_property *reg = (struct reg_property *)
199 get_property(np, "reg", &n);
202 unsigned long total = 0;
204 for (n /= sizeof(struct reg_property); n > 0; --n)
205 total += (reg++)->size;
206 seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
210 /* Checks "l2cr-value" property in the registry */
211 np = find_devices("cpus");
213 np = find_type_devices("cpu");
215 unsigned int *l2cr = (unsigned int *)
216 get_property(np, "l2cr-value", NULL);
218 seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
222 /* Indicate newworld/oldworld */
223 seq_printf(m, "pmac-generation\t: %s\n",
224 pmac_newworld ? "NewWorld" : "OldWorld");
231 pmac_show_percpuinfo(struct seq_file *m, int i)
233 #ifdef CONFIG_CPU_FREQ_PMAC
234 extern unsigned int pmac_get_one_cpufreq(int i);
235 unsigned int freq = pmac_get_one_cpufreq(i);
237 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
240 #endif /* CONFIG_CPU_FREQ_PMAC */
241 return of_show_percpuinfo(m, i);
244 static volatile u32 *sysctrl_regs;
247 pmac_setup_arch(void)
249 struct device_node *cpu;
253 pvr = PVR_VER(mfspr(SPRN_PVR));
255 /* Set loops_per_jiffy to a half-way reasonable value,
256 for use until calibrate_delay gets called. */
257 cpu = find_type_devices("cpu");
259 fp = (int *) get_property(cpu, "clock-frequency", NULL);
261 if (pvr == 4 || pvr >= 8)
262 /* 604, G3, G4 etc. */
263 loops_per_jiffy = *fp / HZ;
266 loops_per_jiffy = *fp / (2*HZ);
268 loops_per_jiffy = 50000000 / HZ;
271 /* this area has the CPU identification register
272 and some registers used by smp boards */
273 sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
276 /* Lookup PCI hosts */
279 /* Checks "l2cr-value" property in the registry */
280 if (cpu_has_feature(CPU_FTR_L2CR)) {
281 struct device_node *np = find_devices("cpus");
283 np = find_type_devices("cpu");
285 unsigned int *l2cr = (unsigned int *)
286 get_property(np, "l2cr-value", NULL);
288 ppc_override_l2cr = 1;
289 ppc_override_l2cr_value = *l2cr;
291 _set_L2CR(ppc_override_l2cr_value);
296 if (ppc_override_l2cr)
297 printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
298 ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
299 ? "enabled" : "disabled");
305 #ifdef CONFIG_ADB_CUDA
308 if (find_devices("via-cuda")) {
309 printk("WARNING ! Your machine is Cuda based but your kernel\n");
310 printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
313 #ifdef CONFIG_ADB_PMU
316 if (find_devices("via-pmu")) {
317 printk("WARNING ! Your machine is PMU based but your kernel\n");
318 printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
324 #ifdef CONFIG_BLK_DEV_INITRD
326 ROOT_DEV = Root_RAM0;
329 ROOT_DEV = DEFAULT_ROOT_DEVICE;
332 /* Check for Core99 */
333 if (find_devices("uni-n") || find_devices("u3"))
334 ppc_md.smp_ops = &core99_smp_ops;
336 ppc_md.smp_ops = &psurge_smp_ops;
337 #endif /* CONFIG_SMP */
339 pci_create_OF_bus_map();
342 static void __init ohare_init(void)
345 * Turn on the L2 cache.
346 * We assume that we have a PSX memory controller iff
347 * we have an ohare I/O controller.
349 if (find_devices("ohare") != NULL) {
350 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
351 if (sysctrl_regs[4] & 0x10)
352 sysctrl_regs[4] |= 0x04000020;
354 sysctrl_regs[4] |= 0x04000000;
356 printk(KERN_INFO "Level 2 cache enabled\n");
361 extern char *bootpath;
362 extern char *bootdevice;
366 extern dev_t boot_dev;
370 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);
399 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
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 */
419 find_boot_device(void)
421 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
422 boot_dev = find_ide_boot();
426 static int initializing = 1;
427 /* TODO: Merge the suspend-to-ram with the common code !!!
428 * currently, this is a stub implementation for suspend-to-disk
432 #ifdef CONFIG_SOFTWARE_SUSPEND
434 static int pmac_pm_prepare(suspend_state_t state)
436 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
441 static int pmac_pm_enter(suspend_state_t state)
443 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
445 /* Giveup the lazy FPU & vec so we don't have to back them
446 * up from the low level code
450 #ifdef CONFIG_ALTIVEC
451 if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
452 enable_kernel_altivec();
453 #endif /* CONFIG_ALTIVEC */
458 static int pmac_pm_finish(suspend_state_t state)
460 printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
462 /* Restore userland MMU context */
463 set_context(current->active_mm->context, current->active_mm->pgd);
468 static struct pm_ops pmac_pm_ops = {
469 .pm_disk_mode = PM_DISK_SHUTDOWN,
470 .prepare = pmac_pm_prepare,
471 .enter = pmac_pm_enter,
472 .finish = pmac_pm_finish,
475 #endif /* CONFIG_SOFTWARE_SUSPEND */
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 */
490 note_bootable_part(dev_t dev, int part, int goodness)
492 static int found_boot = 0;
497 if ((goodness <= current_root_goodness) &&
498 ROOT_DEV != DEFAULT_ROOT_DEVICE)
500 p = strstr(saved_command_line, "root=");
501 if (p != NULL && (p == saved_command_line || p[-1] == ' '))
508 if (!boot_dev || dev == boot_dev) {
509 ROOT_DEV = dev + part;
511 current_root_goodness = goodness;
516 pmac_restart(char *cmd)
518 #ifdef CONFIG_ADB_CUDA
519 struct adb_request req;
520 #endif /* CONFIG_ADB_CUDA */
522 switch (sys_ctrler) {
523 #ifdef CONFIG_ADB_CUDA
524 case SYS_CTRLER_CUDA:
525 cuda_request(&req, NULL, 2, CUDA_PACKET,
530 #endif /* CONFIG_ADB_CUDA */
531 #ifdef CONFIG_ADB_PMU
535 #endif /* CONFIG_ADB_PMU */
543 #ifdef CONFIG_ADB_CUDA
544 struct adb_request req;
545 #endif /* CONFIG_ADB_CUDA */
547 switch (sys_ctrler) {
548 #ifdef CONFIG_ADB_CUDA
549 case SYS_CTRLER_CUDA:
550 cuda_request(&req, NULL, 2, CUDA_PACKET,
555 #endif /* CONFIG_ADB_CUDA */
556 #ifdef CONFIG_ADB_PMU
560 #endif /* CONFIG_ADB_PMU */
572 * Read in a property describing some pieces of memory.
576 get_mem_prop(char *name, struct mem_pieces *mp)
578 struct reg_property *rp;
581 int nac = prom_n_addr_cells(memory_node);
582 int nsc = prom_n_size_cells(memory_node);
584 ip = (unsigned int *) get_property(memory_node, name, &s);
586 printk(KERN_ERR "error: couldn't get %s property on /memory\n",
590 s /= (nsc + nac) * 4;
592 for (i = 0; i < s; ++i, ip += nac+nsc) {
593 if (nac >= 2 && ip[nac-2] != 0)
595 rp->address = ip[nac-1];
596 if (nsc >= 2 && ip[nac+nsc-2] != 0)
599 rp->size = ip[nac+nsc-1];
602 mp->n_regions = rp - mp->regions;
604 /* Make sure the pieces are sorted. */
606 mem_pieces_coalesce(mp);
611 * On systems with Open Firmware, collect information about
612 * physical RAM and which pieces are already in use.
613 * At this point, we have (at least) the first 8MB mapped with a BAT.
614 * Our text, data, bss use something over 1MB, starting at 0.
615 * Open Firmware may be using 1MB at the 4MB point.
618 pmac_find_end_of_memory(void)
620 unsigned long a, total;
621 struct mem_pieces phys_mem;
624 * Find out where physical memory is, and check that it
625 * starts at 0 and is contiguous. It seems that RAM is
626 * always physically contiguous on Power Macintoshes.
628 * Supporting discontiguous physical memory isn't hard,
629 * it just makes the virtual <-> physical mapping functions
630 * more complicated (or else you end up wasting space
633 memory_node = find_devices("memory");
634 if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
635 || phys_mem.n_regions == 0)
637 a = phys_mem.regions[0].address;
639 panic("RAM doesn't start at physical address 0");
640 total = phys_mem.regions[0].size;
642 if (phys_mem.n_regions > 1) {
643 printk("RAM starting at 0x%x is not contiguous\n",
644 phys_mem.regions[1].address);
645 printk("Using RAM from 0 to 0x%lx\n", total-1);
652 pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
653 unsigned long r6, unsigned long r7)
655 /* isa_io_base gets set in pmac_find_bridges */
656 isa_mem_base = PMAC_ISA_MEM_BASE;
657 pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
658 ISA_DMA_THRESHOLD = ~0L;
662 ppc_md.setup_arch = pmac_setup_arch;
663 ppc_md.show_cpuinfo = pmac_show_cpuinfo;
664 ppc_md.show_percpuinfo = pmac_show_percpuinfo;
665 ppc_md.irq_canonicalize = NULL;
666 ppc_md.init_IRQ = pmac_pic_init;
667 ppc_md.get_irq = pmac_get_irq; /* Changed later on ... */
669 ppc_md.pcibios_fixup = pmac_pcibios_fixup;
670 ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
671 ppc_md.pcibios_after_init = pmac_pcibios_after_init;
672 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
674 ppc_md.restart = pmac_restart;
675 ppc_md.power_off = pmac_power_off;
676 ppc_md.halt = pmac_halt;
678 ppc_md.time_init = pmac_time_init;
679 ppc_md.set_rtc_time = pmac_set_rtc_time;
680 ppc_md.get_rtc_time = pmac_get_rtc_time;
681 ppc_md.calibrate_decr = pmac_calibrate_decr;
683 ppc_md.find_end_of_memory = pmac_find_end_of_memory;
685 ppc_md.feature_call = pmac_do_feature_call;
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 #ifdef CONFIG_BOOTX_TEXT
695 ppc_md.progress = pmac_progress;
696 #endif /* CONFIG_BOOTX_TEXT */
698 if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
702 #ifdef CONFIG_BOOTX_TEXT
704 pmac_progress(char *s, unsigned short hex)
706 if (boot_text_mapped) {
708 btext_drawchar('\n');
711 #endif /* CONFIG_BOOTX_TEXT */
714 pmac_declare_of_platform_devices(void)
716 struct device_node *np;
718 np = find_devices("uni-n");
720 for (np = np->child; np != NULL; np = np->sibling)
721 if (strncmp(np->name, "i2c", 3) == 0) {
722 of_platform_device_create(np, "uni-n-i2c",
727 np = find_devices("u3");
729 for (np = np->child; np != NULL; np = np->sibling)
730 if (strncmp(np->name, "i2c", 3) == 0) {
731 of_platform_device_create(np, "u3-i2c",
737 np = find_devices("valkyrie");
739 of_platform_device_create(np, "valkyrie", NULL);
740 np = find_devices("platinum");
742 of_platform_device_create(np, "platinum", NULL);
747 device_initcall(pmac_declare_of_platform_devices);