2 * Copyright (C) 1995 Linus Torvalds
3 * Adapted from 'alpha' version by Gary Thomas
4 * Modified by Cort Dougan (cort@cs.nmt.edu)
11 #include <linux/errno.h>
12 #include <linux/sched.h>
13 #include <linux/kernel.h>
15 #include <linux/stddef.h>
16 #include <linux/unistd.h>
17 #include <linux/ptrace.h>
18 #include <linux/slab.h>
19 #include <linux/user.h>
20 #include <linux/a.out.h>
21 #include <linux/tty.h>
22 #include <linux/major.h>
23 #include <linux/interrupt.h>
24 #include <linux/reboot.h>
25 #include <linux/init.h>
26 #include <linux/pci.h>
27 #include <linux/utsrelease.h>
28 #include <linux/adb.h>
29 #include <linux/module.h>
30 #include <linux/delay.h>
31 #include <linux/console.h>
32 #include <linux/seq_file.h>
33 #include <linux/root_dev.h>
34 #include <linux/initrd.h>
35 #include <linux/timer.h>
38 #include <asm/pgtable.h>
40 #include <asm/pci-bridge.h>
42 #include <asm/machdep.h>
44 #include <asm/hydra.h>
45 #include <asm/sections.h>
47 #include <asm/i8259.h>
55 void rtas_indicator_progress(char *, unsigned short);
58 EXPORT_SYMBOL(_chrp_type);
60 static struct mpic *chrp_mpic;
62 /* Used for doing CHRP event-scans */
63 DEFINE_PER_CPU(struct timer_list, heartbeat_timer);
64 unsigned long event_scan_interval;
66 extern unsigned long loops_per_jiffy;
68 /* To be replaced by RTAS when available */
69 static unsigned int __iomem *briq_SPOR;
72 extern struct smp_ops_t chrp_smp_ops;
75 static const char *gg2_memtypes[4] = {
76 "FPM", "SDRAM", "EDO", "BEDO"
78 static const char *gg2_cachesizes[4] = {
79 "256 KB", "512 KB", "1 MB", "Reserved"
81 static const char *gg2_cachetypes[4] = {
82 "Asynchronous", "Reserved", "Flow-Through Synchronous",
83 "Pipelined Synchronous"
85 static const char *gg2_cachemodes[4] = {
86 "Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
89 static const char *chrp_names[] = {
98 void chrp_show_cpuinfo(struct seq_file *m)
102 struct device_node *root;
103 const char *model = "";
105 root = of_find_node_by_path("/");
107 model = of_get_property(root, "model", NULL);
108 seq_printf(m, "machine\t\t: CHRP %s\n", model);
110 /* longtrail (goldengate) stuff */
111 if (model && !strncmp(model, "IBM,LongTrail", 13)) {
112 /* VLSI VAS96011/12 `Golden Gate 2' */
114 sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
116 for (i = 0; i < (sdramen ? 4 : 6); i++) {
117 t = in_le32(gg2_pci_config_base+
122 switch ((t>>8) & 0x1f) {
145 seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
146 gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
149 t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
150 seq_printf(m, "board l2\t: %s %s (%s)\n",
151 gg2_cachesizes[(t>>7) & 3],
152 gg2_cachetypes[(t>>2) & 3],
153 gg2_cachemodes[t & 3]);
159 * Fixes for the National Semiconductor PC78308VUL SuperI/O
161 * Some versions of Open Firmware incorrectly initialize the IRQ settings
162 * for keyboard and mouse
164 static inline void __init sio_write(u8 val, u8 index)
170 static inline u8 __init sio_read(u8 index)
176 static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
179 u8 level0, type0, active;
181 /* select logical device */
182 sio_write(device, 0x07);
183 active = sio_read(0x30);
184 level0 = sio_read(0x70);
185 type0 = sio_read(0x71);
186 if (level0 != level || type0 != type || !active) {
187 printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
188 "remapping to level %d, type %d, active\n",
189 name, level0, type0, !active ? "in" : "", level, type);
190 sio_write(0x01, 0x30);
191 sio_write(level, 0x70);
192 sio_write(type, 0x71);
196 static void __init sio_init(void)
198 struct device_node *root;
201 root = of_find_node_by_path("/");
205 model = of_get_property(root, "model", NULL);
206 if (model && !strncmp(model, "IBM,LongTrail", 13)) {
207 /* logical device 0 (KBC/Keyboard) */
208 sio_fixup_irq("keyboard", 0, 1, 2);
209 /* select logical device 1 (KBC/Mouse) */
210 sio_fixup_irq("mouse", 1, 12, 2);
217 static void __init pegasos_set_l2cr(void)
219 struct device_node *np;
221 /* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
222 if (_chrp_type != _CHRP_Pegasos)
225 /* Enable L2 cache if needed */
226 np = of_find_node_by_type(NULL, "cpu");
228 const unsigned int *l2cr = of_get_property(np, "l2cr", NULL);
230 printk ("Pegasos l2cr : no cpu l2cr property found\n");
233 if (!((*l2cr) & 0x80000000)) {
234 printk ("Pegasos l2cr : L2 cache was not active, "
237 _set_L2CR((*l2cr) | 0x80000000);
244 static void briq_restart(char *cmd)
248 out_be32(briq_SPOR, 0);
253 * Per default, input/output-device points to the keyboard/screen
254 * If no card is installed, the built-in serial port is used as a fallback.
255 * But unfortunately, the firmware does not connect /chosen/{stdin,stdout}
256 * the the built-in serial node. Instead, a /failsafe node is created.
258 static void chrp_init_early(void)
260 struct device_node *node;
261 const char *property;
263 if (strstr(cmd_line, "console="))
265 /* find the boot console from /chosen/stdout */
268 node = of_find_node_by_path("/");
271 property = of_get_property(node, "model", NULL);
274 if (strcmp(property, "Pegasos2"))
276 /* this is a Pegasos2 */
277 property = of_get_property(of_chosen, "linux,stdout-path", NULL);
281 node = of_find_node_by_path(property);
284 property = of_get_property(node, "device_type", NULL);
287 if (strcmp(property, "serial"))
290 * The 9pin connector is either /failsafe
291 * or /pci@80000000/isa@C/serial@i2F8
292 * The optional graphics card has also type 'serial' in VGA mode.
294 property = of_get_property(node, "name", NULL);
297 if (!strcmp(property, "failsafe") || !strcmp(property, "serial"))
298 add_preferred_console("ttyS", 0, NULL);
303 void __init chrp_setup_arch(void)
305 struct device_node *root = of_find_node_by_path("/");
306 const char *machine = NULL;
308 /* init to some ~sane value until calibrate_delay() runs */
309 loops_per_jiffy = 50000000/HZ;
312 machine = of_get_property(root, "model", NULL);
313 if (machine && strncmp(machine, "Pegasos", 7) == 0) {
314 _chrp_type = _CHRP_Pegasos;
315 } else if (machine && strncmp(machine, "IBM", 3) == 0) {
316 _chrp_type = _CHRP_IBM;
317 } else if (machine && strncmp(machine, "MOT", 3) == 0) {
318 _chrp_type = _CHRP_Motorola;
319 } else if (machine && strncmp(machine, "TotalImpact,BRIQ-1", 18) == 0) {
320 _chrp_type = _CHRP_briq;
321 /* Map the SPOR register on briq and change the restart hook */
322 briq_SPOR = ioremap(0xff0000e8, 4);
323 ppc_md.restart = briq_restart;
325 /* Let's assume it is an IBM chrp if all else fails */
326 _chrp_type = _CHRP_IBM;
329 printk("chrp type = %x [%s]\n", _chrp_type, chrp_names[_chrp_type]);
332 if (rtas_token("display-character") >= 0)
333 ppc_md.progress = rtas_progress;
335 /* use RTAS time-of-day routines if available */
336 if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
337 ppc_md.get_boot_time = rtas_get_boot_time;
338 ppc_md.get_rtc_time = rtas_get_rtc_time;
339 ppc_md.set_rtc_time = rtas_set_rtc_time;
342 /* On pegasos, enable the L2 cache if not already done by OF */
345 /* Lookup PCI host bridges */
349 * Temporary fixes for PCI devices.
352 hydra_init(); /* Mac I/O */
355 * Fix the Super I/O configuration
359 pci_create_OF_bus_map();
362 * Print the banner, then scroll down so boot progress
363 * can be printed. -- Cort
365 if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
369 chrp_event_scan(unsigned long unused)
371 unsigned char log[1024];
374 /* XXX: we should loop until the hardware says no more error logs -- Cort */
375 rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
377 mod_timer(&__get_cpu_var(heartbeat_timer),
378 jiffies + event_scan_interval);
381 static void chrp_8259_cascade(unsigned int irq, struct irq_desc *desc)
383 unsigned int cascade_irq = i8259_irq();
384 if (cascade_irq != NO_IRQ)
385 generic_handle_irq(cascade_irq);
386 desc->chip->eoi(irq);
390 * Finds the open-pic node and sets up the mpic driver.
392 static void __init chrp_find_openpic(void)
394 struct device_node *np, *root;
396 int isu_size, idu_size;
397 const unsigned int *iranges, *opprop = NULL;
399 unsigned long opaddr;
402 np = of_find_node_by_type(NULL, "open-pic");
405 root = of_find_node_by_path("/");
407 opprop = of_get_property(root, "platform-open-pic", &oplen);
408 na = of_n_addr_cells(root);
410 if (opprop && oplen >= na * sizeof(unsigned int)) {
411 opaddr = opprop[na-1]; /* assume 32-bit */
412 oplen /= na * sizeof(unsigned int);
415 if (of_address_to_resource(np, 0, &r)) {
422 printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
424 iranges = of_get_property(np, "interrupt-ranges", &len);
426 len = 0; /* non-distributed mpic */
428 len /= 2 * sizeof(unsigned int);
431 * The first pair of cells in interrupt-ranges refers to the
432 * IDU; subsequent pairs refer to the ISUs.
435 printk(KERN_ERR "Insufficient addresses for distributed"
436 " OpenPIC (%d < %d)\n", oplen, len);
442 if (len > 0 && iranges[1] != 0) {
443 printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
444 iranges[0], iranges[0] + iranges[1] - 1);
445 idu_size = iranges[1];
448 isu_size = iranges[3];
450 chrp_mpic = mpic_alloc(np, opaddr, MPIC_PRIMARY,
451 isu_size, 0, " MPIC ");
452 if (chrp_mpic == NULL) {
453 printk(KERN_ERR "Failed to allocate MPIC structure\n");
457 for (i = 1; i < len; ++i) {
460 printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
461 iranges[0], iranges[0] + iranges[1] - 1,
463 mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
466 mpic_init(chrp_mpic);
467 ppc_md.get_irq = mpic_get_irq;
473 #if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
474 static struct irqaction xmon_irqaction = {
476 .mask = CPU_MASK_NONE,
477 .name = "XMON break",
481 static void __init chrp_find_8259(void)
483 struct device_node *np, *pic = NULL;
484 unsigned long chrp_int_ack = 0;
485 unsigned int cascade_irq;
487 /* Look for cascade */
488 for_each_node_by_type(np, "interrupt-controller")
489 if (of_device_is_compatible(np, "chrp,iic")) {
493 /* Ok, 8259 wasn't found. We need to handle the case where
494 * we have a pegasos that claims to be chrp but doesn't have
495 * a proper interrupt tree
497 if (pic == NULL && chrp_mpic != NULL) {
498 printk(KERN_ERR "i8259: Not found in device-tree"
499 " assuming no legacy interrupts\n");
503 /* Look for intack. In a perfect world, we would look for it on
504 * the ISA bus that holds the 8259 but heh... Works that way. If
505 * we ever see a problem, we can try to re-use the pSeries code here.
506 * Also, Pegasos-type platforms don't have a proper node to start
509 for_each_node_by_name(np, "pci") {
510 const unsigned int *addrp = of_get_property(np,
511 "8259-interrupt-acknowledge", NULL);
515 chrp_int_ack = addrp[of_n_addr_cells(np)-1];
520 printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
521 " address, polling\n");
523 i8259_init(pic, chrp_int_ack);
524 if (ppc_md.get_irq == NULL) {
525 ppc_md.get_irq = i8259_irq;
526 irq_set_default_host(i8259_get_host());
528 if (chrp_mpic != NULL) {
529 cascade_irq = irq_of_parse_and_map(pic, 0);
530 if (cascade_irq == NO_IRQ)
531 printk(KERN_ERR "i8259: failed to map cascade irq\n");
533 set_irq_chained_handler(cascade_irq,
538 void __init chrp_init_IRQ(void)
540 #if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
541 struct device_node *kbd;
547 /* Pegasos has no MPIC, those ops would make it crash. It might be an
548 * option to move setting them to after we probe the PIC though
550 if (chrp_mpic != NULL)
551 smp_ops = &chrp_smp_ops;
552 #endif /* CONFIG_SMP */
554 if (_chrp_type == _CHRP_Pegasos)
555 ppc_md.get_irq = i8259_irq;
557 #if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
558 /* see if there is a keyboard in the device tree
559 with a parent of type "adb" */
560 for_each_node_by_name(kbd, "keyboard")
561 if (kbd->parent && kbd->parent->type
562 && strcmp(kbd->parent->type, "adb") == 0)
566 setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
573 struct device_node *device;
574 const unsigned int *p = NULL;
580 request_region(0x20,0x20,"pic1");
581 request_region(0xa0,0x20,"pic2");
582 request_region(0x00,0x20,"dma1");
583 request_region(0x40,0x20,"timer");
584 request_region(0x80,0x10,"dma page reg");
585 request_region(0xc0,0x20,"dma2");
587 /* Get the event scan rate for the rtas so we know how
588 * often it expects a heartbeat. -- Cort
590 device = of_find_node_by_name(NULL, "rtas");
592 p = of_get_property(device, "rtas-event-scan-rate", NULL);
595 * Arrange to call chrp_event_scan at least *p times
596 * per minute. We use 59 rather than 60 here so that
597 * the rate will be slightly higher than the minimum.
598 * This all assumes we don't do hotplug CPU on any
599 * machine that needs the event scans done.
601 unsigned long interval, offset;
603 struct timer_list *timer;
605 interval = HZ * 59 / *p;
607 ncpus = num_online_cpus();
608 event_scan_interval = ncpus * interval;
609 for (cpu = 0; cpu < ncpus; ++cpu) {
610 timer = &per_cpu(heartbeat_timer, cpu);
611 setup_timer(timer, chrp_event_scan, 0);
612 timer->expires = jiffies + offset;
613 add_timer_on(timer, cpu);
616 printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
622 ppc_md.progress(" Have fun! ", 0x7777);
625 static int __init chrp_probe(void)
627 char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
628 "device_type", NULL);
631 if (strcmp(dtype, "chrp"))
634 ISA_DMA_THRESHOLD = ~0L;
635 DMA_MODE_READ = 0x44;
636 DMA_MODE_WRITE = 0x48;
641 define_machine(chrp) {
644 .setup_arch = chrp_setup_arch,
646 .init_early = chrp_init_early,
647 .show_cpuinfo = chrp_show_cpuinfo,
648 .init_IRQ = chrp_init_IRQ,
649 .restart = rtas_restart,
650 .power_off = rtas_power_off,
652 .time_init = chrp_time_init,
653 .set_rtc_time = chrp_set_rtc_time,
654 .get_rtc_time = chrp_get_rtc_time,
655 .calibrate_decr = generic_calibrate_decr,
656 .phys_mem_access_prot = pci_phys_mem_access_prot,