2 * linux/arch/ppc/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
5 * Adapted from 'alpha' version by Gary Thomas
6 * Modified by Cort Dougan (cort@cs.nmt.edu)
7 * Modified by PPC64 Team, IBM Corp
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
16 * bootup setup stuff..
21 #include <linux/config.h>
22 #include <linux/errno.h>
23 #include <linux/sched.h>
24 #include <linux/kernel.h>
26 #include <linux/stddef.h>
27 #include <linux/unistd.h>
28 #include <linux/slab.h>
29 #include <linux/user.h>
30 #include <linux/a.out.h>
31 #include <linux/tty.h>
32 #include <linux/major.h>
33 #include <linux/interrupt.h>
34 #include <linux/reboot.h>
35 #include <linux/init.h>
36 #include <linux/ioport.h>
37 #include <linux/console.h>
38 #include <linux/pci.h>
39 #include <linux/version.h>
40 #include <linux/adb.h>
41 #include <linux/module.h>
42 #include <linux/delay.h>
43 #include <linux/irq.h>
44 #include <linux/seq_file.h>
45 #include <linux/root_dev.h>
48 #include <asm/processor.h>
50 #include <asm/pgtable.h>
53 #include <asm/pci-bridge.h>
54 #include <asm/iommu.h>
56 #include <asm/machdep.h>
59 #include <asm/nvram.h>
60 #include <asm/plpar_wrappers.h>
62 #include <asm/cputable.h>
69 #define DBG(fmt...) udbg_printf(fmt)
74 extern void pSeries_final_fixup(void);
76 extern void pSeries_get_boot_time(struct rtc_time *rtc_time);
77 extern void pSeries_get_rtc_time(struct rtc_time *rtc_time);
78 extern int pSeries_set_rtc_time(struct rtc_time *rtc_time);
79 extern void find_udbg_vterm(void);
80 extern void system_reset_fwnmi(void); /* from head.S */
81 extern void machine_check_fwnmi(void); /* from head.S */
82 extern void generic_find_legacy_serial_ports(u64 *physport,
83 unsigned int *default_speed);
85 int fwnmi_active; /* TRUE if an FWNMI handler is present */
87 extern void pSeries_system_reset_exception(struct pt_regs *regs);
88 extern int pSeries_machine_check_exception(struct pt_regs *regs);
90 static volatile void __iomem * chrp_int_ack_special;
91 struct mpic *pSeries_mpic;
93 void pSeries_get_cpuinfo(struct seq_file *m)
95 struct device_node *root;
96 const char *model = "";
98 root = of_find_node_by_path("/");
100 model = get_property(root, "model", NULL);
101 seq_printf(m, "machine\t\t: CHRP %s\n", model);
105 /* Initialize firmware assisted non-maskable interrupts if
106 * the firmware supports this feature.
109 static void __init fwnmi_init(void)
112 int ibm_nmi_register = rtas_token("ibm,nmi-register");
113 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
115 ret = rtas_call(ibm_nmi_register, 2, 1, NULL,
116 __pa((unsigned long)system_reset_fwnmi),
117 __pa((unsigned long)machine_check_fwnmi));
122 static int pSeries_irq_cascade(struct pt_regs *regs, void *data)
124 if (chrp_int_ack_special)
125 return readb(chrp_int_ack_special);
127 return i8259_irq(smp_processor_id());
130 static void __init pSeries_init_mpic(void)
133 struct device_node *np;
136 /* All ISUs are setup, complete initialization */
137 mpic_init(pSeries_mpic);
139 /* Check what kind of cascade ACK we have */
140 if (!(np = of_find_node_by_name(NULL, "pci"))
141 || !(addrp = (unsigned int *)
142 get_property(np, "8259-interrupt-acknowledge", NULL)))
143 printk(KERN_ERR "Cannot find pci to get ack address\n");
145 chrp_int_ack_special = ioremap(addrp[prom_n_addr_cells(np)-1], 1);
148 /* Setup the legacy interrupts & controller */
149 for (i = 0; i < NUM_ISA_INTERRUPTS; i++)
150 irq_desc[i].handler = &i8259_pic;
153 /* Hook cascade to mpic */
154 mpic_setup_cascade(NUM_ISA_INTERRUPTS, pSeries_irq_cascade, NULL);
157 static void __init pSeries_setup_mpic(void)
159 unsigned int *opprop;
160 unsigned long openpic_addr = 0;
161 unsigned char senses[NR_IRQS - NUM_ISA_INTERRUPTS];
162 struct device_node *root;
165 /* Find the Open PIC if present */
166 root = of_find_node_by_path("/");
167 opprop = (unsigned int *) get_property(root, "platform-open-pic", NULL);
169 int n = prom_n_addr_cells(root);
171 for (openpic_addr = 0; n > 0; --n)
172 openpic_addr = (openpic_addr << 32) + *opprop++;
173 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
177 BUG_ON(openpic_addr == 0);
179 /* Get the sense values from OF */
180 prom_get_irq_senses(senses, NUM_ISA_INTERRUPTS, NR_IRQS);
182 /* Setup the openpic driver */
183 irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */
184 pSeries_mpic = mpic_alloc(openpic_addr, MPIC_PRIMARY,
185 16, 16, irq_count, /* isu size, irq offset, irq count */
186 NR_IRQS - 4, /* ipi offset */
187 senses, irq_count, /* sense & sense size */
191 static void __init pSeries_setup_arch(void)
193 /* Fixup ppc_md depending on the type of interrupt controller */
194 if (ppc64_interrupt_controller == IC_OPEN_PIC) {
195 ppc_md.init_IRQ = pSeries_init_mpic;
196 ppc_md.get_irq = mpic_get_irq;
197 /* Allocate the mpic now, so that find_and_init_phbs() can
199 pSeries_setup_mpic();
201 ppc_md.init_IRQ = xics_init_IRQ;
202 ppc_md.get_irq = xics_get_irq;
208 /* openpic global configuration register (64-bit format). */
209 /* openpic Interrupt Source Unit pointer (64-bit format). */
210 /* python0 facility area (mmio) (64-bit format) REAL address. */
212 /* init to some ~sane value until calibrate_delay() runs */
213 loops_per_jiffy = 50000000;
216 printk("No ramdisk, default root is /dev/sda2\n");
217 ROOT_DEV = Root_SDA2;
222 /* Find and initialize PCI host bridges */
223 init_pci_config_tokens();
225 find_and_init_phbs();
227 #ifdef CONFIG_DUMMY_CONSOLE
228 conswitchp = &dummy_con;
231 pSeries_nvram_init();
233 if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR)
234 vpa_init(boot_cpuid);
237 static int __init pSeries_init_panel(void)
239 /* Manually leave the kernel version on the panel. */
240 ppc_md.progress("Linux ppc64\n", 0);
241 ppc_md.progress(UTS_RELEASE, 0);
245 arch_initcall(pSeries_init_panel);
248 /* Build up the firmware_features bitmask field
249 * using contents of device-tree/ibm,hypertas-functions.
250 * Ultimately this functionality may be moved into prom.c prom_init().
252 void __init fw_feature_init(void)
254 struct device_node * dn;
258 DBG(" -> fw_feature_init()\n");
260 cur_cpu_spec->firmware_features = 0;
261 dn = of_find_node_by_path("/rtas");
263 printk(KERN_ERR "WARNING ! Cannot find RTAS in device-tree !\n");
267 hypertas = get_property(dn, "ibm,hypertas-functions", &len);
271 /* check value against table of strings */
272 for(i=0; i < FIRMWARE_MAX_FEATURES ;i++) {
273 if ((firmware_features_table[i].name) &&
274 (strcmp(firmware_features_table[i].name,hypertas))==0) {
275 /* we have a match */
276 cur_cpu_spec->firmware_features |=
277 (firmware_features_table[i].val);
281 hypertas_len = strlen(hypertas);
282 len -= hypertas_len +1;
283 hypertas+= hypertas_len +1;
289 printk(KERN_INFO "firmware_features = 0x%lx\n",
290 cur_cpu_spec->firmware_features);
292 DBG(" <- fw_feature_init()\n");
296 static void __init pSeries_discover_pic(void)
298 struct device_node *np;
302 * Setup interrupt mapping options that are needed for finish_device_tree
303 * to properly parse the OF interrupt tree & do the virtual irq mapping
305 __irq_offset_value = NUM_ISA_INTERRUPTS;
306 ppc64_interrupt_controller = IC_INVALID;
307 for (np = NULL; (np = of_find_node_by_name(np, "interrupt-controller"));) {
308 typep = (char *)get_property(np, "compatible", NULL);
309 if (strstr(typep, "open-pic"))
310 ppc64_interrupt_controller = IC_OPEN_PIC;
311 else if (strstr(typep, "ppc-xicp"))
312 ppc64_interrupt_controller = IC_PPC_XIC;
314 printk("pSeries_discover_pic: failed to recognize"
315 " interrupt-controller\n");
320 static void pSeries_mach_cpu_die(void)
324 /* Some hardware requires clearing the CPPR, while other hardware does not
325 * it is safe either way
327 pSeriesLP_cppr_info(0, 0);
329 /* Should never get here... */
336 * Early initialization. Relocation is on but do not reference unbolted pages
338 static void __init pSeries_init_early(void)
342 unsigned int default_speed;
345 DBG(" -> pSeries_init_early()\n");
349 if (systemcfg->platform & PLATFORM_LPAR)
353 iommu_off = (of_chosen &&
354 get_property(of_chosen, "linux,iommu-off", NULL));
357 generic_find_legacy_serial_ports(&physport, &default_speed);
359 if (systemcfg->platform & PLATFORM_LPAR)
362 /* Map the uart for udbg. */
363 comport = (void *)ioremap(physport, 16);
364 udbg_init_uart(comport, default_speed);
366 ppc_md.udbg_putc = udbg_putc;
367 ppc_md.udbg_getc = udbg_getc;
368 ppc_md.udbg_getc_poll = udbg_getc_poll;
369 DBG("Hello World !\n");
373 iommu_init_early_pSeries();
375 pSeries_discover_pic();
377 DBG(" <- pSeries_init_early()\n");
381 static void pSeries_progress(char *s, unsigned short hex)
383 struct device_node *root;
386 static int display_character, set_indicator;
387 static int max_width;
388 static DEFINE_SPINLOCK(progress_lock);
389 static int pending_newline = 0; /* did last write end with unprinted newline? */
394 if (max_width == 0) {
395 if ((root = find_path_device("/rtas")) &&
396 (p = (unsigned int *)get_property(root,
397 "ibm,display-line-length",
402 display_character = rtas_token("display-character");
403 set_indicator = rtas_token("set-indicator");
406 if (display_character == RTAS_UNKNOWN_SERVICE) {
407 /* use hex display if available */
408 if (set_indicator != RTAS_UNKNOWN_SERVICE)
409 rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex);
413 spin_lock(&progress_lock);
416 * Last write ended with newline, but we didn't print it since
417 * it would just clear the bottom line of output. Print it now
420 * If no newline is pending, print a CR to start output at the
421 * beginning of the line.
423 if (pending_newline) {
424 rtas_call(display_character, 1, 1, NULL, '\r');
425 rtas_call(display_character, 1, 1, NULL, '\n');
428 rtas_call(display_character, 1, 1, NULL, '\r');
434 if (*os == '\n' || *os == '\r') {
435 /* Blank to end of line. */
437 rtas_call(display_character, 1, 1, NULL, ' ');
439 /* If newline is the last character, save it
440 * until next call to avoid bumping up the
443 if (*os == '\n' && !os[1]) {
445 spin_unlock(&progress_lock);
449 /* RTAS wants CR-LF, not just LF */
452 rtas_call(display_character, 1, 1, NULL, '\r');
453 rtas_call(display_character, 1, 1, NULL, '\n');
455 /* CR might be used to re-draw a line, so we'll
456 * leave it alone and not add LF.
458 rtas_call(display_character, 1, 1, NULL, *os);
464 rtas_call(display_character, 1, 1, NULL, *os);
469 /* if we overwrite the screen length */
471 while ((*os != 0) && (*os != '\n') && (*os != '\r'))
475 /* Blank to end of line. */
477 rtas_call(display_character, 1, 1, NULL, ' ');
479 spin_unlock(&progress_lock);
482 static int pSeries_check_legacy_ioport(unsigned int baseport)
484 struct device_node *np;
486 #define I8042_DATA_REG 0x60
487 #define FDC_BASE 0x3f0
492 np = of_find_node_by_type(NULL, "8042");
498 np = of_find_node_by_type(NULL, "fdc");
508 * Called very early, MMU is off, device-tree isn't unflattened
510 extern struct machdep_calls pSeries_md;
512 static int __init pSeries_probe(int platform)
514 if (platform != PLATFORM_PSERIES &&
515 platform != PLATFORM_PSERIES_LPAR)
518 /* if we have some ppc_md fixups for LPAR to do, do
525 struct machdep_calls __initdata pSeries_md = {
526 .probe = pSeries_probe,
527 .setup_arch = pSeries_setup_arch,
528 .init_early = pSeries_init_early,
529 .get_cpuinfo = pSeries_get_cpuinfo,
530 .log_error = pSeries_log_error,
531 .pcibios_fixup = pSeries_final_fixup,
532 .restart = rtas_restart,
533 .power_off = rtas_power_off,
535 .panic = rtas_os_term,
536 .cpu_die = pSeries_mach_cpu_die,
537 .get_boot_time = pSeries_get_boot_time,
538 .get_rtc_time = pSeries_get_rtc_time,
539 .set_rtc_time = pSeries_set_rtc_time,
540 .calibrate_decr = generic_calibrate_decr,
541 .progress = pSeries_progress,
542 .check_legacy_ioport = pSeries_check_legacy_ioport,
543 .system_reset_exception = pSeries_system_reset_exception,
544 .machine_check_exception = pSeries_machine_check_exception,