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[PATCH] ppc64: Make idle_loop a ppc_md function 

This patch adds an idle member to the ppc_md structure and calls it from
cpu_idle().  If a platform leaves ppc_md.idle as null it will get the default
idle loop default_idle().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael Ellerman 2005-07-07 17:56:28 -07:00 committed by Linus Torvalds
parent 88de0be0c7
commit fd899c0cc7
3 changed files with 13 additions and 6 deletions
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8
arch/ppc64/kernel/idle.c
View File

@ -33,6 +33,7 @@
#include <asm/iSeries/ItLpQueue.h>
#include <asm/plpar_wrappers.h>
#include <asm/systemcfg.h>
#include <asm/machdep.h>
extern void power4_idle(void);
@ -122,7 +123,7 @@ static int iSeries_idle(void)
#else
static int default_idle(void)
int default_idle(void)
{
long oldval;
unsigned int cpu = smp_processor_id();
@ -288,7 +289,7 @@ static int shared_idle(void)
#endif /* CONFIG_PPC_PSERIES */
static int native_idle(void)
int native_idle(void)
{
while(1) {
/* check CPU type here */
@ -308,7 +309,8 @@ static int native_idle(void)
void cpu_idle(void)
{
idle_loop();
BUG_ON(NULL == ppc_md.idle_loop);
ppc_md.idle_loop();
}
int powersave_nap;

6
arch/ppc64/kernel/setup.c
View File

@ -96,7 +96,6 @@ extern void udbg_init_maple_realmode(void);
extern unsigned long klimit;
extern void mm_init_ppc64(void);
extern int idle_setup(void);
extern void stab_initialize(unsigned long stab);
extern void htab_initialize(void);
extern void early_init_devtree(void *flat_dt);
@ -1081,8 +1080,9 @@ void __init setup_arch(char **cmdline_p)
ppc_md.setup_arch();
/* Select the correct idle loop for the platform. */
idle_setup();
/* Use the default idle loop if the platform hasn't provided one. */
if (NULL == ppc_md.idle_loop)
ppc_md.idle_loop = default_idle;
paging_init();
ppc64_boot_msg(0x15, "Setup Done");

5
include/asm-ppc64/machdep.h
View File

@ -140,8 +140,13 @@ struct machdep_calls {
unsigned long size,
pgprot_t vma_prot);
/* Idle loop for this platform, leave empty for default idle loop */
int (*idle_loop)(void);
};
extern int default_idle(void);
extern int native_idle(void);
extern struct machdep_calls ppc_md;
extern char cmd_line[COMMAND_LINE_SIZE];