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Put the CPU to sleep when idle

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This commit is contained in:
macallan 2005-09-25 00:06:52 +00:00
parent e98ce31365
commit c4a1cd0ef7
1 changed files with 28 additions and 2 deletions
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30
sys/arch/sparc/sparc/msiiep.c
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@ -1,4 +1,4 @@
/* $NetBSD: msiiep.c,v 1.28 2005/09/24 22:30:15 macallan Exp $ */ /* $NetBSD: msiiep.c,v 1.29 2005/09/25 00:06:52 macallan Exp $ */
/* /*
* Copyright (c) 2001 Valeriy E. Ushakov * Copyright (c) 2001 Valeriy E. Ushakov
@ -27,7 +27,7 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: msiiep.c,v 1.28 2005/09/24 22:30:15 macallan Exp $"); __KERNEL_RCSID(0, "$NetBSD: msiiep.c,v 1.29 2005/09/25 00:06:52 macallan Exp $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/malloc.h> #include <sys/malloc.h>
@ -148,6 +148,9 @@ static void mspcic_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
static int mspcic_dmamem_map(bus_dma_tag_t, bus_dma_segment_t *, static int mspcic_dmamem_map(bus_dma_tag_t, bus_dma_segment_t *,
int, size_t, caddr_t *, int); int, size_t, caddr_t *, int);
volatile uint32_t *msiiep_mid = NULL;
void msiiep_cpu_sleep(struct cpu_info *);
static struct sparc_bus_dma_tag mspcic_dma_tag = { static struct sparc_bus_dma_tag mspcic_dma_tag = {
NULL, /* _cookie */ NULL, /* _cookie */
@ -216,6 +219,17 @@ msiiep_attach(struct device *parent, struct device *self, void *aux)
aprint_normal("\n"); aprint_normal("\n");
if (bus_space_map(ma->ma_bustag, MSIIEP_MID_PA, 4, 0, &hmid) == 0) {
mid = bus_space_read_4(ma->ma_bustag, hmid, 0);
#ifdef DIAGNOSTICS
printf("MID: %08x\n", mid);
#endif
msiiep_mid = (volatile uint32_t *)bus_space_vaddr(ma->ma_bustag,
hmid);
cur = curcpu();
cur->idlespin = msiiep_cpu_sleep;
}
/* pass on real mainbus_attach_args */ /* pass on real mainbus_attach_args */
msa.msa_ma = ma; msa.msa_ma = ma;
@ -228,6 +242,18 @@ msiiep_attach(struct device *parent, struct device *self, void *aux)
config_found(self, &msa, NULL); config_found(self, &msa, NULL);
} }
/* ARGSUSED */
void
msiiep_cpu_sleep(struct cpu_info *ci)
{
uint32_t reg;
if (msiiep_mid == 0)
return;
reg = *msiiep_mid;
*msiiep_mid = (reg & MID_MASK) | MID_STANDBY;
}
/* /*
* Turn PCIC endian swapping on/off. The kernel runs with endian * Turn PCIC endian swapping on/off. The kernel runs with endian
* swapping turned on early in bootstrap(), but we need to turn it off * swapping turned on early in bootstrap(), but we need to turn it off