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intel_idle: add initial Sandy Bridge support

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Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2010-07-07 00:12:03 -04:00
parent 815c4163b6
commit d13780d439
1 changed files with 43 additions and 1 deletions
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44
drivers/idle/intel_idle.c
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@ -83,7 +83,7 @@ static unsigned int substates;
static int (*choose_substate)(int);
/* Reliable LAPIC Timer States, bit 1 for C1 etc. */
static unsigned int lapic_timer_reliable_states;
static unsigned int lapic_timer_reliable_states = (1 << 1); /* Default to only C1 */
static struct cpuidle_device *intel_idle_cpuidle_devices;
static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state);
@ -126,6 +126,42 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
.enter = &intel_idle },
};
static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C0 */ },
{ /* MWAIT C1 */
.name = "SNB-C1",
.desc = "MWAIT 0x00",
.driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 1,
.target_residency = 4,
.enter = &intel_idle },
{ /* MWAIT C2 */
.name = "SNB-C3",
.desc = "MWAIT 0x10",
.driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 80,
.target_residency = 160,
.enter = &intel_idle },
{ /* MWAIT C3 */
.name = "SNB-C6",
.desc = "MWAIT 0x20",
.driver_data = (void *) 0x20,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 104,
.target_residency = 208,
.enter = &intel_idle },
{ /* MWAIT C4 */
.name = "SNB-C7",
.desc = "MWAIT 0x30",
.driver_data = (void *) 0x30,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 109,
.target_residency = 300,
.enter = &intel_idle },
};
static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C0 */ },
{ /* MWAIT C1 */
@ -312,6 +348,12 @@ static int intel_idle_probe(void)
cpuidle_state_table = atom_cstates;
choose_substate = choose_zero_substate;
break;
case 0x2A: /* SNB */
case 0x2D: /* SNB Xeon */
cpuidle_state_table = snb_cstates;
choose_substate = choose_zero_substate;
break;
#ifdef FUTURE_USE
case 0x17: /* 23 - Core 2 Duo */
lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */