3 * Procedures for interfacing to the RTAS on CHRP machines.
5 * Peter Bergner, IBM March 2001.
6 * Copyright (C) 2001 IBM.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/spinlock.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/capability.h>
21 #include <linux/delay.h>
22 #include <linux/smp.h>
23 #include <linux/completion.h>
24 #include <linux/cpumask.h>
25 #include <linux/lmb.h>
29 #include <asm/hvcall.h>
30 #include <asm/machdep.h>
31 #include <asm/firmware.h>
33 #include <asm/param.h>
34 #include <asm/system.h>
35 #include <asm/delay.h>
36 #include <asm/uaccess.h>
38 #include <asm/syscalls.h>
40 #include <asm/atomic.h>
42 struct rtas_t rtas
= {
43 .lock
= SPIN_LOCK_UNLOCKED
47 struct rtas_suspend_me_data
{
48 atomic_t working
; /* number of cpus accessing this struct */
50 int token
; /* ibm,suspend-me */
52 struct completion
*complete
; /* wait on this until working == 0 */
55 DEFINE_SPINLOCK(rtas_data_buf_lock
);
56 EXPORT_SYMBOL(rtas_data_buf_lock
);
58 char rtas_data_buf
[RTAS_DATA_BUF_SIZE
] __cacheline_aligned
;
59 EXPORT_SYMBOL(rtas_data_buf
);
61 unsigned long rtas_rmo_buf
;
64 * If non-NULL, this gets called when the kernel terminates.
65 * This is done like this so rtas_flash can be a module.
67 void (*rtas_flash_term_hook
)(int);
68 EXPORT_SYMBOL(rtas_flash_term_hook
);
71 * call_rtas_display_status and call_rtas_display_status_delay
72 * are designed only for very early low-level debugging, which
73 * is why the token is hard-coded to 10.
75 static void call_rtas_display_status(char c
)
77 struct rtas_args
*args
= &rtas
.args
;
82 spin_lock_irqsave(&rtas
.lock
, s
);
87 args
->rets
= (rtas_arg_t
*)&(args
->args
[1]);
88 args
->args
[0] = (unsigned char)c
;
90 enter_rtas(__pa(args
));
92 spin_unlock_irqrestore(&rtas
.lock
, s
);
95 static void call_rtas_display_status_delay(char c
)
97 static int pending_newline
= 0; /* did last write end with unprinted newline? */
98 static int width
= 16;
102 call_rtas_display_status(' ');
107 if (pending_newline
) {
108 call_rtas_display_status('\r');
109 call_rtas_display_status('\n');
113 call_rtas_display_status(c
);
119 void __init
udbg_init_rtas_panel(void)
121 udbg_putc
= call_rtas_display_status_delay
;
124 #ifdef CONFIG_UDBG_RTAS_CONSOLE
126 /* If you think you're dying before early_init_dt_scan_rtas() does its
127 * work, you can hard code the token values for your firmware here and
128 * hardcode rtas.base/entry etc.
130 static unsigned int rtas_putchar_token
= RTAS_UNKNOWN_SERVICE
;
131 static unsigned int rtas_getchar_token
= RTAS_UNKNOWN_SERVICE
;
133 static void udbg_rtascon_putc(char c
)
140 /* Add CRs before LFs */
142 udbg_rtascon_putc('\r');
144 /* if there is more than one character to be displayed, wait a bit */
145 for (tries
= 0; tries
< 16; tries
++) {
146 if (rtas_call(rtas_putchar_token
, 1, 1, NULL
, c
) == 0)
152 static int udbg_rtascon_getc_poll(void)
159 if (rtas_call(rtas_getchar_token
, 0, 2, &c
))
165 static int udbg_rtascon_getc(void)
169 while ((c
= udbg_rtascon_getc_poll()) == -1)
176 void __init
udbg_init_rtas_console(void)
178 udbg_putc
= udbg_rtascon_putc
;
179 udbg_getc
= udbg_rtascon_getc
;
180 udbg_getc_poll
= udbg_rtascon_getc_poll
;
182 #endif /* CONFIG_UDBG_RTAS_CONSOLE */
184 void rtas_progress(char *s
, unsigned short hex
)
186 struct device_node
*root
;
190 static int display_character
, set_indicator
;
191 static int display_width
, display_lines
, form_feed
;
192 static const int *row_width
;
193 static DEFINE_SPINLOCK(progress_lock
);
194 static int current_line
;
195 static int pending_newline
= 0; /* did last write end with unprinted newline? */
200 if (display_width
== 0) {
201 display_width
= 0x10;
202 if ((root
= of_find_node_by_path("/rtas"))) {
203 if ((p
= of_get_property(root
,
204 "ibm,display-line-length", NULL
)))
206 if ((p
= of_get_property(root
,
207 "ibm,form-feed", NULL
)))
209 if ((p
= of_get_property(root
,
210 "ibm,display-number-of-lines", NULL
)))
212 row_width
= of_get_property(root
,
213 "ibm,display-truncation-length", NULL
);
216 display_character
= rtas_token("display-character");
217 set_indicator
= rtas_token("set-indicator");
220 if (display_character
== RTAS_UNKNOWN_SERVICE
) {
221 /* use hex display if available */
222 if (set_indicator
!= RTAS_UNKNOWN_SERVICE
)
223 rtas_call(set_indicator
, 3, 1, NULL
, 6, 0, hex
);
227 spin_lock(&progress_lock
);
230 * Last write ended with newline, but we didn't print it since
231 * it would just clear the bottom line of output. Print it now
234 * If no newline is pending and form feed is supported, clear the
235 * display with a form feed; otherwise, print a CR to start output
236 * at the beginning of the line.
238 if (pending_newline
) {
239 rtas_call(display_character
, 1, 1, NULL
, '\r');
240 rtas_call(display_character
, 1, 1, NULL
, '\n');
245 rtas_call(display_character
, 1, 1, NULL
,
248 rtas_call(display_character
, 1, 1, NULL
, '\r');
252 width
= row_width
[current_line
];
254 width
= display_width
;
257 if (*os
== '\n' || *os
== '\r') {
258 /* If newline is the last character, save it
259 * until next call to avoid bumping up the
262 if (*os
== '\n' && !os
[1]) {
265 if (current_line
> display_lines
-1)
266 current_line
= display_lines
-1;
267 spin_unlock(&progress_lock
);
271 /* RTAS wants CR-LF, not just LF */
274 rtas_call(display_character
, 1, 1, NULL
, '\r');
275 rtas_call(display_character
, 1, 1, NULL
, '\n');
277 /* CR might be used to re-draw a line, so we'll
278 * leave it alone and not add LF.
280 rtas_call(display_character
, 1, 1, NULL
, *os
);
284 width
= row_width
[current_line
];
286 width
= display_width
;
289 rtas_call(display_character
, 1, 1, NULL
, *os
);
294 /* if we overwrite the screen length */
296 while ((*os
!= 0) && (*os
!= '\n') && (*os
!= '\r'))
300 spin_unlock(&progress_lock
);
302 EXPORT_SYMBOL(rtas_progress
); /* needed by rtas_flash module */
304 int rtas_token(const char *service
)
307 if (rtas
.dev
== NULL
)
308 return RTAS_UNKNOWN_SERVICE
;
309 tokp
= of_get_property(rtas
.dev
, service
, NULL
);
310 return tokp
? *tokp
: RTAS_UNKNOWN_SERVICE
;
312 EXPORT_SYMBOL(rtas_token
);
314 int rtas_service_present(const char *service
)
316 return rtas_token(service
) != RTAS_UNKNOWN_SERVICE
;
318 EXPORT_SYMBOL(rtas_service_present
);
320 #ifdef CONFIG_RTAS_ERROR_LOGGING
322 * Return the firmware-specified size of the error log buffer
323 * for all rtas calls that require an error buffer argument.
324 * This includes 'check-exception' and 'rtas-last-error'.
326 int rtas_get_error_log_max(void)
328 static int rtas_error_log_max
;
329 if (rtas_error_log_max
)
330 return rtas_error_log_max
;
332 rtas_error_log_max
= rtas_token ("rtas-error-log-max");
333 if ((rtas_error_log_max
== RTAS_UNKNOWN_SERVICE
) ||
334 (rtas_error_log_max
> RTAS_ERROR_LOG_MAX
)) {
335 printk (KERN_WARNING
"RTAS: bad log buffer size %d\n",
337 rtas_error_log_max
= RTAS_ERROR_LOG_MAX
;
339 return rtas_error_log_max
;
341 EXPORT_SYMBOL(rtas_get_error_log_max
);
344 static char rtas_err_buf
[RTAS_ERROR_LOG_MAX
];
345 static int rtas_last_error_token
;
347 /** Return a copy of the detailed error text associated with the
348 * most recent failed call to rtas. Because the error text
349 * might go stale if there are any other intervening rtas calls,
350 * this routine must be called atomically with whatever produced
351 * the error (i.e. with rtas.lock still held from the previous call).
353 static char *__fetch_rtas_last_error(char *altbuf
)
355 struct rtas_args err_args
, save_args
;
359 if (rtas_last_error_token
== -1)
362 bufsz
= rtas_get_error_log_max();
364 err_args
.token
= rtas_last_error_token
;
367 err_args
.args
[0] = (rtas_arg_t
)__pa(rtas_err_buf
);
368 err_args
.args
[1] = bufsz
;
369 err_args
.args
[2] = 0;
371 save_args
= rtas
.args
;
372 rtas
.args
= err_args
;
374 enter_rtas(__pa(&rtas
.args
));
376 err_args
= rtas
.args
;
377 rtas
.args
= save_args
;
379 /* Log the error in the unlikely case that there was one. */
380 if (unlikely(err_args
.args
[2] == 0)) {
386 buf
= kmalloc(RTAS_ERROR_LOG_MAX
, GFP_ATOMIC
);
389 memcpy(buf
, rtas_err_buf
, RTAS_ERROR_LOG_MAX
);
395 #define get_errorlog_buffer() kmalloc(RTAS_ERROR_LOG_MAX, GFP_KERNEL)
397 #else /* CONFIG_RTAS_ERROR_LOGGING */
398 #define __fetch_rtas_last_error(x) NULL
399 #define get_errorlog_buffer() NULL
402 int rtas_call(int token
, int nargs
, int nret
, int *outputs
, ...)
407 struct rtas_args
*rtas_args
;
408 char *buff_copy
= NULL
;
411 if (!rtas
.entry
|| token
== RTAS_UNKNOWN_SERVICE
)
414 /* Gotta do something different here, use global lock for now... */
415 spin_lock_irqsave(&rtas
.lock
, s
);
416 rtas_args
= &rtas
.args
;
418 rtas_args
->token
= token
;
419 rtas_args
->nargs
= nargs
;
420 rtas_args
->nret
= nret
;
421 rtas_args
->rets
= (rtas_arg_t
*)&(rtas_args
->args
[nargs
]);
422 va_start(list
, outputs
);
423 for (i
= 0; i
< nargs
; ++i
)
424 rtas_args
->args
[i
] = va_arg(list
, rtas_arg_t
);
427 for (i
= 0; i
< nret
; ++i
)
428 rtas_args
->rets
[i
] = 0;
430 enter_rtas(__pa(rtas_args
));
432 /* A -1 return code indicates that the last command couldn't
433 be completed due to a hardware error. */
434 if (rtas_args
->rets
[0] == -1)
435 buff_copy
= __fetch_rtas_last_error(NULL
);
437 if (nret
> 1 && outputs
!= NULL
)
438 for (i
= 0; i
< nret
-1; ++i
)
439 outputs
[i
] = rtas_args
->rets
[i
+1];
440 ret
= (nret
> 0)? rtas_args
->rets
[0]: 0;
442 /* Gotta do something different here, use global lock for now... */
443 spin_unlock_irqrestore(&rtas
.lock
, s
);
446 log_error(buff_copy
, ERR_TYPE_RTAS_LOG
, 0);
452 EXPORT_SYMBOL(rtas_call
);
454 /* For RTAS_BUSY (-2), delay for 1 millisecond. For an extended busy status
455 * code of 990n, perform the hinted delay of 10^n (last digit) milliseconds.
457 unsigned int rtas_busy_delay_time(int status
)
462 if (status
== RTAS_BUSY
) {
464 } else if (status
>= 9900 && status
<= 9905) {
465 order
= status
- 9900;
466 for (ms
= 1; order
> 0; order
--)
472 EXPORT_SYMBOL(rtas_busy_delay_time
);
474 /* For an RTAS busy status code, perform the hinted delay. */
475 unsigned int rtas_busy_delay(int status
)
480 ms
= rtas_busy_delay_time(status
);
486 EXPORT_SYMBOL(rtas_busy_delay
);
488 static int rtas_error_rc(int rtas_rc
)
493 case -1: /* Hardware Error */
496 case -3: /* Bad indicator/domain/etc */
499 case -9000: /* Isolation error */
502 case -9001: /* Outstanding TCE/PTE */
505 case -9002: /* No usable slot */
509 printk(KERN_ERR
"%s: unexpected RTAS error %d\n",
517 int rtas_get_power_level(int powerdomain
, int *level
)
519 int token
= rtas_token("get-power-level");
522 if (token
== RTAS_UNKNOWN_SERVICE
)
525 while ((rc
= rtas_call(token
, 1, 2, level
, powerdomain
)) == RTAS_BUSY
)
529 return rtas_error_rc(rc
);
532 EXPORT_SYMBOL(rtas_get_power_level
);
534 int rtas_set_power_level(int powerdomain
, int level
, int *setlevel
)
536 int token
= rtas_token("set-power-level");
539 if (token
== RTAS_UNKNOWN_SERVICE
)
543 rc
= rtas_call(token
, 2, 2, setlevel
, powerdomain
, level
);
544 } while (rtas_busy_delay(rc
));
547 return rtas_error_rc(rc
);
550 EXPORT_SYMBOL(rtas_set_power_level
);
552 int rtas_get_sensor(int sensor
, int index
, int *state
)
554 int token
= rtas_token("get-sensor-state");
557 if (token
== RTAS_UNKNOWN_SERVICE
)
561 rc
= rtas_call(token
, 2, 2, state
, sensor
, index
);
562 } while (rtas_busy_delay(rc
));
565 return rtas_error_rc(rc
);
568 EXPORT_SYMBOL(rtas_get_sensor
);
570 bool rtas_indicator_present(int token
, int *maxindex
)
572 int proplen
, count
, i
;
573 const struct indicator_elem
{
578 indicators
= of_get_property(rtas
.dev
, "rtas-indicators", &proplen
);
582 count
= proplen
/ sizeof(struct indicator_elem
);
584 for (i
= 0; i
< count
; i
++) {
585 if (indicators
[i
].token
!= token
)
588 *maxindex
= indicators
[i
].maxindex
;
594 EXPORT_SYMBOL(rtas_indicator_present
);
596 int rtas_set_indicator(int indicator
, int index
, int new_value
)
598 int token
= rtas_token("set-indicator");
601 if (token
== RTAS_UNKNOWN_SERVICE
)
605 rc
= rtas_call(token
, 3, 1, NULL
, indicator
, index
, new_value
);
606 } while (rtas_busy_delay(rc
));
609 return rtas_error_rc(rc
);
612 EXPORT_SYMBOL(rtas_set_indicator
);
615 * Ignoring RTAS extended delay
617 int rtas_set_indicator_fast(int indicator
, int index
, int new_value
)
620 int token
= rtas_token("set-indicator");
622 if (token
== RTAS_UNKNOWN_SERVICE
)
625 rc
= rtas_call(token
, 3, 1, NULL
, indicator
, index
, new_value
);
627 WARN_ON(rc
== -2 || (rc
>= 9900 && rc
<= 9905));
630 return rtas_error_rc(rc
);
635 void rtas_restart(char *cmd
)
637 if (rtas_flash_term_hook
)
638 rtas_flash_term_hook(SYS_RESTART
);
639 printk("RTAS system-reboot returned %d\n",
640 rtas_call(rtas_token("system-reboot"), 0, 1, NULL
));
644 void rtas_power_off(void)
646 if (rtas_flash_term_hook
)
647 rtas_flash_term_hook(SYS_POWER_OFF
);
648 /* allow power on only with power button press */
649 printk("RTAS power-off returned %d\n",
650 rtas_call(rtas_token("power-off"), 2, 1, NULL
, -1, -1));
656 if (rtas_flash_term_hook
)
657 rtas_flash_term_hook(SYS_HALT
);
658 /* allow power on only with power button press */
659 printk("RTAS power-off returned %d\n",
660 rtas_call(rtas_token("power-off"), 2, 1, NULL
, -1, -1));
664 /* Must be in the RMO region, so we place it here */
665 static char rtas_os_term_buf
[2048];
667 void rtas_os_term(char *str
)
674 if (RTAS_UNKNOWN_SERVICE
== rtas_token("ibm,os-term"))
677 snprintf(rtas_os_term_buf
, 2048, "OS panic: %s", str
);
680 status
= rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL
,
681 __pa(rtas_os_term_buf
));
682 } while (rtas_busy_delay(status
));
685 printk(KERN_EMERG
"ibm,os-term call failed %d\n",
689 static int ibm_suspend_me_token
= RTAS_UNKNOWN_SERVICE
;
690 #ifdef CONFIG_PPC_PSERIES
691 static void rtas_percpu_suspend_me(void *info
)
694 unsigned long msr_save
;
696 struct rtas_suspend_me_data
*data
=
697 (struct rtas_suspend_me_data
*)info
;
699 atomic_inc(&data
->working
);
701 /* really need to ensure MSR.EE is off for H_JOIN */
703 mtmsr(msr_save
& ~(MSR_EE
));
705 while (rc
== H_SUCCESS
&& !atomic_read(&data
->done
))
706 rc
= plpar_hcall_norets(H_JOIN
);
710 if (rc
== H_SUCCESS
) {
711 /* This cpu was prodded and the suspend is complete. */
713 } else if (rc
== H_CONTINUE
) {
714 /* All other cpus are in H_JOIN, this cpu does
717 printk(KERN_DEBUG
"calling ibm,suspend-me on cpu %i\n",
719 data
->error
= rtas_call(data
->token
, 0, 1, NULL
);
722 printk(KERN_DEBUG
"ibm,suspend-me returned %d\n",
725 printk(KERN_ERR
"H_JOIN on cpu %i failed with rc = %ld\n",
726 smp_processor_id(), rc
);
730 atomic_set(&data
->done
, 1);
732 /* This cpu did the suspend or got an error; in either case,
733 * we need to prod all other other cpus out of join state.
734 * Extra prods are harmless.
736 for_each_online_cpu(cpu
)
737 plpar_hcall_norets(H_PROD
, get_hard_smp_processor_id(cpu
));
739 if (atomic_dec_return(&data
->working
) == 0)
740 complete(data
->complete
);
743 static int rtas_ibm_suspend_me(struct rtas_args
*args
)
747 unsigned long retbuf
[PLPAR_HCALL_BUFSIZE
];
748 struct rtas_suspend_me_data data
;
749 DECLARE_COMPLETION_ONSTACK(done
);
751 if (!rtas_service_present("ibm,suspend-me"))
754 /* Make sure the state is valid */
755 rc
= plpar_hcall(H_VASI_STATE
, retbuf
,
756 ((u64
)args
->args
[0] << 32) | args
->args
[1]);
761 printk(KERN_ERR
"rtas_ibm_suspend_me: vasi_state returned %ld\n",rc
);
763 } else if (state
== H_VASI_ENABLED
) {
764 args
->args
[args
->nargs
] = RTAS_NOT_SUSPENDABLE
;
766 } else if (state
!= H_VASI_SUSPENDING
) {
767 printk(KERN_ERR
"rtas_ibm_suspend_me: vasi_state returned state %ld\n",
769 args
->args
[args
->nargs
] = -1;
773 atomic_set(&data
.working
, 0);
774 atomic_set(&data
.done
, 0);
775 data
.token
= rtas_token("ibm,suspend-me");
777 data
.complete
= &done
;
779 /* Call function on all CPUs. One of us will make the
782 if (on_each_cpu(rtas_percpu_suspend_me
, &data
, 0))
783 data
.error
= -EINVAL
;
785 wait_for_completion(&done
);
788 printk(KERN_ERR
"Error doing global join\n");
792 #else /* CONFIG_PPC_PSERIES */
793 static int rtas_ibm_suspend_me(struct rtas_args
*args
)
799 asmlinkage
int ppc_rtas(struct rtas_args __user
*uargs
)
801 struct rtas_args args
;
803 char *buff_copy
, *errbuf
= NULL
;
807 if (!capable(CAP_SYS_ADMIN
))
810 if (copy_from_user(&args
, uargs
, 3 * sizeof(u32
)) != 0)
814 if (nargs
> ARRAY_SIZE(args
.args
)
815 || args
.nret
> ARRAY_SIZE(args
.args
)
816 || nargs
+ args
.nret
> ARRAY_SIZE(args
.args
))
820 if (copy_from_user(args
.args
, uargs
->args
,
821 nargs
* sizeof(rtas_arg_t
)) != 0)
824 if (args
.token
== RTAS_UNKNOWN_SERVICE
)
827 args
.rets
= &args
.args
[nargs
];
828 memset(args
.rets
, 0, args
.nret
* sizeof(rtas_arg_t
));
830 /* Need to handle ibm,suspend_me call specially */
831 if (args
.token
== ibm_suspend_me_token
) {
832 rc
= rtas_ibm_suspend_me(&args
);
838 buff_copy
= get_errorlog_buffer();
840 spin_lock_irqsave(&rtas
.lock
, flags
);
843 enter_rtas(__pa(&rtas
.args
));
846 /* A -1 return code indicates that the last command couldn't
847 be completed due to a hardware error. */
848 if (args
.rets
[0] == -1)
849 errbuf
= __fetch_rtas_last_error(buff_copy
);
851 spin_unlock_irqrestore(&rtas
.lock
, flags
);
855 log_error(errbuf
, ERR_TYPE_RTAS_LOG
, 0);
861 if (copy_to_user(uargs
->args
+ nargs
,
863 args
.nret
* sizeof(rtas_arg_t
)) != 0)
870 * Call early during boot, before mem init or bootmem, to retrieve the RTAS
871 * informations from the device-tree and allocate the RMO buffer for userland
874 void __init
rtas_initialize(void)
876 unsigned long rtas_region
= RTAS_INSTANTIATE_MAX
;
878 /* Get RTAS dev node and fill up our "rtas" structure with infos
881 rtas
.dev
= of_find_node_by_name(NULL
, "rtas");
883 const u32
*basep
, *entryp
, *sizep
;
885 basep
= of_get_property(rtas
.dev
, "linux,rtas-base", NULL
);
886 sizep
= of_get_property(rtas
.dev
, "rtas-size", NULL
);
887 if (basep
!= NULL
&& sizep
!= NULL
) {
890 entryp
= of_get_property(rtas
.dev
,
891 "linux,rtas-entry", NULL
);
892 if (entryp
== NULL
) /* Ugh */
893 rtas
.entry
= rtas
.base
;
895 rtas
.entry
= *entryp
;
902 /* If RTAS was found, allocate the RMO buffer for it and look for
903 * the stop-self token if any
906 if (machine_is(pseries
) && firmware_has_feature(FW_FEATURE_LPAR
)) {
907 rtas_region
= min(lmb
.rmo_size
, RTAS_INSTANTIATE_MAX
);
908 ibm_suspend_me_token
= rtas_token("ibm,suspend-me");
911 rtas_rmo_buf
= lmb_alloc_base(RTAS_RMOBUF_MAX
, PAGE_SIZE
, rtas_region
);
913 #ifdef CONFIG_RTAS_ERROR_LOGGING
914 rtas_last_error_token
= rtas_token("rtas-last-error");
918 int __init
early_init_dt_scan_rtas(unsigned long node
,
919 const char *uname
, int depth
, void *data
)
921 u32
*basep
, *entryp
, *sizep
;
923 if (depth
!= 1 || strcmp(uname
, "rtas") != 0)
926 basep
= of_get_flat_dt_prop(node
, "linux,rtas-base", NULL
);
927 entryp
= of_get_flat_dt_prop(node
, "linux,rtas-entry", NULL
);
928 sizep
= of_get_flat_dt_prop(node
, "rtas-size", NULL
);
930 if (basep
&& entryp
&& sizep
) {
932 rtas
.entry
= *entryp
;
936 #ifdef CONFIG_UDBG_RTAS_CONSOLE
937 basep
= of_get_flat_dt_prop(node
, "put-term-char", NULL
);
939 rtas_putchar_token
= *basep
;
941 basep
= of_get_flat_dt_prop(node
, "get-term-char", NULL
);
943 rtas_getchar_token
= *basep
;
945 if (rtas_putchar_token
!= RTAS_UNKNOWN_SERVICE
&&
946 rtas_getchar_token
!= RTAS_UNKNOWN_SERVICE
)
947 udbg_init_rtas_console();