diff options
| author | marcel <marcel@FreeBSD.org> | 2008-03-07 22:27:06 +0000 |
|---|---|---|
| committer | marcel <marcel@FreeBSD.org> | 2008-03-07 22:27:06 +0000 |
| commit | 37503bed38aa9304c3b657c2bf893df779fd13ed (patch) | |
| tree | 9f48ed3f05e5d512df0ddf1e6bef225e75ecc82d /sys/powerpc/aim/machdep.c | |
| parent | df20e1735314eed9a226f7e24d8dc9de19712a24 (diff) | |
| download | FreeBSD-src-37503bed38aa9304c3b657c2bf893df779fd13ed.zip FreeBSD-src-37503bed38aa9304c3b657c2bf893df779fd13ed.tar.gz | |
For AIM, have cpu_idle() set MSR_POW when the powerpc_pow_enabled
variable is set. On my Mac Mini this puts the CPU in NAP mode when
the kernel is idle and, any technical or environmental reasons
aside, avoids that I have to listen to the fan all day :-)
Diffstat (limited to 'sys/powerpc/aim/machdep.c')
| -rw-r--r-- | sys/powerpc/aim/machdep.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sys/powerpc/aim/machdep.c b/sys/powerpc/aim/machdep.c index 23c6eb2..4a70556 100644 --- a/sys/powerpc/aim/machdep.c +++ b/sys/powerpc/aim/machdep.c @@ -107,6 +107,7 @@ __FBSDID("$FreeBSD$"); #include <machine/cpu.h> #include <machine/elf.h> #include <machine/fpu.h> +#include <machine/hid.h> #include <machine/kdb.h> #include <machine/md_var.h> #include <machine/metadata.h> @@ -737,15 +738,22 @@ cpu_halt(void) void cpu_idle(void) { - /* TODO: Insert code to halt (until next interrupt) */ + uint32_t msr; + + msr = mfmsr(); #ifdef INVARIANTS - if ((mfmsr() & PSL_EE) != PSL_EE) { + if ((msr & PSL_EE) != PSL_EE) { struct thread *td = curthread; printf("td msr %x\n", td->td_md.md_saved_msr); panic("ints disabled in idleproc!"); } #endif + if (powerpc_pow_enabled) { + __asm __volatile("sync"); + mtmsr(msr | PSL_POW); + isync(); + } } /* |
