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nexedi
linux
Commits
3bc50a7e
Commit
3bc50a7e
authored
Nov 17, 2002
by
Eric Brower
Committed by
David S. Miller
Nov 17, 2002
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Plain Diff
[SPARC]: Make APC idle a boot time cmdline option.
parent
6ea22620
Changes
1
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1 changed file
with
23 additions
and
5 deletions
+23
-5
arch/sparc/kernel/apc.c
arch/sparc/kernel/apc.c
+23
-5
No files found.
arch/sparc/kernel/apc.c
View file @
3bc50a7e
...
...
@@ -22,7 +22,6 @@
/* Debugging
*
* #define APC_DEBUG_LED
* #define APC_NO_IDLE
*/
#define APC_MINOR MISC_DYNAMIC_MINOR
...
...
@@ -31,10 +30,27 @@
volatile
static
u8
*
regs
;
static
int
apc_regsize
;
static
int
apc_no_idle
__initdata
=
0
;
#define apc_readb(offs) (sbus_readb(regs+offs))
#define apc_writeb(val, offs) (sbus_writeb(val, regs+offs))
/* Specify "apc=noidle" on the kernel command line to
* disable APC CPU standby support. Certain prototype
* systems (SPARCstation-Fox) do not play well with APC
* CPU idle, so disable this if your system has APC and
* crashes randomly.
*/
static
int
__init
apc_setup
(
char
*
str
)
{
if
(
!
strncmp
(
str
,
"noidle"
,
strlen
(
"noidle"
)))
{
apc_no_idle
=
1
;
return
1
;
}
return
0
;
}
__setup
(
"apc="
,
apc_setup
);
/*
* CPU idle callback function
* See .../arch/sparc/kernel/process.c
...
...
@@ -127,6 +143,7 @@ static int __init apc_probe(void)
struct
sbus_bus
*
sbus
=
NULL
;
struct
sbus_dev
*
sdev
=
NULL
;
int
iTmp
=
0
;
for_each_sbus
(
sbus
)
{
for_each_sbusdev
(
sdev
,
sbus
)
{
if
(
!
strcmp
(
sdev
->
prom_name
,
APC_OBPNAME
))
{
...
...
@@ -155,12 +172,12 @@ static int __init apc_probe(void)
return
-
ENODEV
;
}
#ifndef APC_NO_IDLE
/* Assign power management IDLE handler */
pm_idle
=
apc_swift_idle
;
#endif
if
(
!
apc_no_idle
)
pm_idle
=
apc_swift_idle
;
printk
(
KERN_INFO
"%s: power management initialized
\n
"
,
APC_DEVNAME
);
printk
(
KERN_INFO
"%s: power management initialized%s
\n
"
,
APC_DEVNAME
,
apc_no_idle
?
" (CPU idle disabled)"
:
""
);
return
0
;
}
...
...
@@ -169,3 +186,4 @@ static int __init apc_probe(void)
* initialized, so we install ourselves thusly:
*/
__initcall
(
apc_probe
);
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