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 find_udbg_vterm(void);
77 extern void system_reset_fwnmi(void); /* from head.S */
78 extern void machine_check_fwnmi(void); /* from head.S */
79 extern void generic_find_legacy_serial_ports(u64
*physport
,
80 unsigned int *default_speed
);
82 int fwnmi_active
; /* TRUE if an FWNMI handler is present */
84 extern void pSeries_system_reset_exception(struct pt_regs
*regs
);
85 extern int pSeries_machine_check_exception(struct pt_regs
*regs
);
87 static volatile void __iomem
* chrp_int_ack_special
;
88 struct mpic
*pSeries_mpic
;
90 void pSeries_get_cpuinfo(struct seq_file
*m
)
92 struct device_node
*root
;
93 const char *model
= "";
95 root
= of_find_node_by_path("/");
97 model
= get_property(root
, "model", NULL
);
98 seq_printf(m
, "machine\t\t: CHRP %s\n", model
);
102 /* Initialize firmware assisted non-maskable interrupts if
103 * the firmware supports this feature.
106 static void __init
fwnmi_init(void)
109 int ibm_nmi_register
= rtas_token("ibm,nmi-register");
110 if (ibm_nmi_register
== RTAS_UNKNOWN_SERVICE
)
112 ret
= rtas_call(ibm_nmi_register
, 2, 1, NULL
,
113 __pa((unsigned long)system_reset_fwnmi
),
114 __pa((unsigned long)machine_check_fwnmi
));
119 static int pSeries_irq_cascade(struct pt_regs
*regs
, void *data
)
121 if (chrp_int_ack_special
)
122 return readb(chrp_int_ack_special
);
124 return i8259_irq(smp_processor_id());
127 static void __init
pSeries_init_mpic(void)
130 struct device_node
*np
;
133 /* All ISUs are setup, complete initialization */
134 mpic_init(pSeries_mpic
);
136 /* Check what kind of cascade ACK we have */
137 if (!(np
= of_find_node_by_name(NULL
, "pci"))
138 || !(addrp
= (unsigned int *)
139 get_property(np
, "8259-interrupt-acknowledge", NULL
)))
140 printk(KERN_ERR
"Cannot find pci to get ack address\n");
142 chrp_int_ack_special
= ioremap(addrp
[prom_n_addr_cells(np
)-1], 1);
145 /* Setup the legacy interrupts & controller */
146 for (i
= 0; i
< NUM_ISA_INTERRUPTS
; i
++)
147 irq_desc
[i
].handler
= &i8259_pic
;
150 /* Hook cascade to mpic */
151 mpic_setup_cascade(NUM_ISA_INTERRUPTS
, pSeries_irq_cascade
, NULL
);
154 static void __init
pSeries_setup_mpic(void)
156 unsigned int *opprop
;
157 unsigned long openpic_addr
= 0;
158 unsigned char senses
[NR_IRQS
- NUM_ISA_INTERRUPTS
];
159 struct device_node
*root
;
162 /* Find the Open PIC if present */
163 root
= of_find_node_by_path("/");
164 opprop
= (unsigned int *) get_property(root
, "platform-open-pic", NULL
);
166 int n
= prom_n_addr_cells(root
);
168 for (openpic_addr
= 0; n
> 0; --n
)
169 openpic_addr
= (openpic_addr
<< 32) + *opprop
++;
170 printk(KERN_DEBUG
"OpenPIC addr: %lx\n", openpic_addr
);
174 BUG_ON(openpic_addr
== 0);
176 /* Get the sense values from OF */
177 prom_get_irq_senses(senses
, NUM_ISA_INTERRUPTS
, NR_IRQS
);
179 /* Setup the openpic driver */
180 irq_count
= NR_IRQS
- NUM_ISA_INTERRUPTS
- 4; /* leave room for IPIs */
181 pSeries_mpic
= mpic_alloc(openpic_addr
, MPIC_PRIMARY
,
182 16, 16, irq_count
, /* isu size, irq offset, irq count */
183 NR_IRQS
- 4, /* ipi offset */
184 senses
, irq_count
, /* sense & sense size */
188 static void __init
pSeries_setup_arch(void)
190 /* Fixup ppc_md depending on the type of interrupt controller */
191 if (ppc64_interrupt_controller
== IC_OPEN_PIC
) {
192 ppc_md
.init_IRQ
= pSeries_init_mpic
;
193 ppc_md
.get_irq
= mpic_get_irq
;
194 /* Allocate the mpic now, so that find_and_init_phbs() can
196 pSeries_setup_mpic();
198 ppc_md
.init_IRQ
= xics_init_IRQ
;
199 ppc_md
.get_irq
= xics_get_irq
;
205 /* openpic global configuration register (64-bit format). */
206 /* openpic Interrupt Source Unit pointer (64-bit format). */
207 /* python0 facility area (mmio) (64-bit format) REAL address. */
209 /* init to some ~sane value until calibrate_delay() runs */
210 loops_per_jiffy
= 50000000;
213 printk("No ramdisk, default root is /dev/sda2\n");
214 ROOT_DEV
= Root_SDA2
;
219 /* Find and initialize PCI host bridges */
220 init_pci_config_tokens();
222 find_and_init_phbs();
224 #ifdef CONFIG_DUMMY_CONSOLE
225 conswitchp
= &dummy_con
;
228 pSeries_nvram_init();
230 if (cur_cpu_spec
->firmware_features
& FW_FEATURE_SPLPAR
)
231 vpa_init(boot_cpuid
);
234 static int __init
pSeries_init_panel(void)
236 /* Manually leave the kernel version on the panel. */
237 ppc_md
.progress("Linux ppc64\n", 0);
238 ppc_md
.progress(UTS_RELEASE
, 0);
242 arch_initcall(pSeries_init_panel
);
245 /* Build up the firmware_features bitmask field
246 * using contents of device-tree/ibm,hypertas-functions.
247 * Ultimately this functionality may be moved into prom.c prom_init().
249 void __init
fw_feature_init(void)
251 struct device_node
* dn
;
255 DBG(" -> fw_feature_init()\n");
257 cur_cpu_spec
->firmware_features
= 0;
258 dn
= of_find_node_by_path("/rtas");
260 printk(KERN_ERR
"WARNING ! Cannot find RTAS in device-tree !\n");
264 hypertas
= get_property(dn
, "ibm,hypertas-functions", &len
);
268 /* check value against table of strings */
269 for(i
=0; i
< FIRMWARE_MAX_FEATURES
;i
++) {
270 if ((firmware_features_table
[i
].name
) &&
271 (strcmp(firmware_features_table
[i
].name
,hypertas
))==0) {
272 /* we have a match */
273 cur_cpu_spec
->firmware_features
|=
274 (firmware_features_table
[i
].val
);
278 hypertas_len
= strlen(hypertas
);
279 len
-= hypertas_len
+1;
280 hypertas
+= hypertas_len
+1;
286 printk(KERN_INFO
"firmware_features = 0x%lx\n",
287 cur_cpu_spec
->firmware_features
);
289 DBG(" <- fw_feature_init()\n");
293 static void __init
pSeries_discover_pic(void)
295 struct device_node
*np
;
299 * Setup interrupt mapping options that are needed for finish_device_tree
300 * to properly parse the OF interrupt tree & do the virtual irq mapping
302 __irq_offset_value
= NUM_ISA_INTERRUPTS
;
303 ppc64_interrupt_controller
= IC_INVALID
;
304 for (np
= NULL
; (np
= of_find_node_by_name(np
, "interrupt-controller"));) {
305 typep
= (char *)get_property(np
, "compatible", NULL
);
306 if (strstr(typep
, "open-pic"))
307 ppc64_interrupt_controller
= IC_OPEN_PIC
;
308 else if (strstr(typep
, "ppc-xicp"))
309 ppc64_interrupt_controller
= IC_PPC_XIC
;
311 printk("pSeries_discover_pic: failed to recognize"
312 " interrupt-controller\n");
317 static void pSeries_mach_cpu_die(void)
321 /* Some hardware requires clearing the CPPR, while other hardware does not
322 * it is safe either way
324 pSeriesLP_cppr_info(0, 0);
326 /* Should never get here... */
333 * Early initialization. Relocation is on but do not reference unbolted pages
335 static void __init
pSeries_init_early(void)
339 unsigned int default_speed
;
342 DBG(" -> pSeries_init_early()\n");
346 if (systemcfg
->platform
& PLATFORM_LPAR
)
350 iommu_off
= (of_chosen
&&
351 get_property(of_chosen
, "linux,iommu-off", NULL
));
354 generic_find_legacy_serial_ports(&physport
, &default_speed
);
356 if (systemcfg
->platform
& PLATFORM_LPAR
)
359 /* Map the uart for udbg. */
360 comport
= (void *)ioremap(physport
, 16);
361 udbg_init_uart(comport
, default_speed
);
363 ppc_md
.udbg_putc
= udbg_putc
;
364 ppc_md
.udbg_getc
= udbg_getc
;
365 ppc_md
.udbg_getc_poll
= udbg_getc_poll
;
366 DBG("Hello World !\n");
370 iommu_init_early_pSeries();
372 pSeries_discover_pic();
374 DBG(" <- pSeries_init_early()\n");
378 static void pSeries_progress(char *s
, unsigned short hex
)
380 struct device_node
*root
;
383 static int display_character
, set_indicator
;
384 static int max_width
;
385 static DEFINE_SPINLOCK(progress_lock
);
386 static int pending_newline
= 0; /* did last write end with unprinted newline? */
391 if (max_width
== 0) {
392 if ((root
= find_path_device("/rtas")) &&
393 (p
= (unsigned int *)get_property(root
,
394 "ibm,display-line-length",
399 display_character
= rtas_token("display-character");
400 set_indicator
= rtas_token("set-indicator");
403 if (display_character
== RTAS_UNKNOWN_SERVICE
) {
404 /* use hex display if available */
405 if (set_indicator
!= RTAS_UNKNOWN_SERVICE
)
406 rtas_call(set_indicator
, 3, 1, NULL
, 6, 0, hex
);
410 spin_lock(&progress_lock
);
413 * Last write ended with newline, but we didn't print it since
414 * it would just clear the bottom line of output. Print it now
417 * If no newline is pending, print a CR to start output at the
418 * beginning of the line.
420 if (pending_newline
) {
421 rtas_call(display_character
, 1, 1, NULL
, '\r');
422 rtas_call(display_character
, 1, 1, NULL
, '\n');
425 rtas_call(display_character
, 1, 1, NULL
, '\r');
431 if (*os
== '\n' || *os
== '\r') {
432 /* Blank to end of line. */
434 rtas_call(display_character
, 1, 1, NULL
, ' ');
436 /* If newline is the last character, save it
437 * until next call to avoid bumping up the
440 if (*os
== '\n' && !os
[1]) {
442 spin_unlock(&progress_lock
);
446 /* RTAS wants CR-LF, not just LF */
449 rtas_call(display_character
, 1, 1, NULL
, '\r');
450 rtas_call(display_character
, 1, 1, NULL
, '\n');
452 /* CR might be used to re-draw a line, so we'll
453 * leave it alone and not add LF.
455 rtas_call(display_character
, 1, 1, NULL
, *os
);
461 rtas_call(display_character
, 1, 1, NULL
, *os
);
466 /* if we overwrite the screen length */
468 while ((*os
!= 0) && (*os
!= '\n') && (*os
!= '\r'))
472 /* Blank to end of line. */
474 rtas_call(display_character
, 1, 1, NULL
, ' ');
476 spin_unlock(&progress_lock
);
479 static int pSeries_check_legacy_ioport(unsigned int baseport
)
481 struct device_node
*np
;
483 #define I8042_DATA_REG 0x60
484 #define FDC_BASE 0x3f0
489 np
= of_find_node_by_type(NULL
, "8042");
495 np
= of_find_node_by_type(NULL
, "fdc");
505 * Called very early, MMU is off, device-tree isn't unflattened
507 extern struct machdep_calls pSeries_md
;
509 static int __init
pSeries_probe(int platform
)
511 if (platform
!= PLATFORM_PSERIES
&&
512 platform
!= PLATFORM_PSERIES_LPAR
)
515 /* if we have some ppc_md fixups for LPAR to do, do
522 struct machdep_calls __initdata pSeries_md
= {
523 .probe
= pSeries_probe
,
524 .setup_arch
= pSeries_setup_arch
,
525 .init_early
= pSeries_init_early
,
526 .get_cpuinfo
= pSeries_get_cpuinfo
,
527 .log_error
= pSeries_log_error
,
528 .pcibios_fixup
= pSeries_final_fixup
,
529 .restart
= rtas_restart
,
530 .power_off
= rtas_power_off
,
532 .panic
= rtas_os_term
,
533 .cpu_die
= pSeries_mach_cpu_die
,
534 .get_boot_time
= rtas_get_boot_time
,
535 .get_rtc_time
= rtas_get_rtc_time
,
536 .set_rtc_time
= rtas_set_rtc_time
,
537 .calibrate_decr
= generic_calibrate_decr
,
538 .progress
= pSeries_progress
,
539 .check_legacy_ioport
= pSeries_check_legacy_ioport
,
540 .system_reset_exception
= pSeries_system_reset_exception
,
541 .machine_check_exception
= pSeries_machine_check_exception
,