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Commit d13780d4 authored by Len Brown's avatar Len Brown
Browse files

intel_idle: add initial Sandy Bridge support 



Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 815c4163

drivers/idle/intel_idle.c

+43 −1
Original line number Diff line number Diff line
@@ -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 */