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intel_idle: Support Intel Atom Processor C2000 Product Family 

Support the "Intel(R) Atom(TM) Processor C2000 Product Family",
formerly code-named Avoton.  It is based on the next generation
Intel Atom processor architecture, formerly code-named Silvermont.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Len Brown 2013-11-09 00:30:17 -05:00 committed by Rafael J. Wysocki
parent f612a4fbdc
commit fab04b2208
1 changed files with 23 additions and 1 deletions
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24
drivers/idle/intel_idle.c
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@ -1,7 +1,7 @@
/*
* intel_idle.c - native hardware idle loop for modern Intel processors
*
* Copyright (c) 2010, Intel Corporation.
* Copyright (c) 2013, Intel Corporation.
* Len Brown <len.brown@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
@ -329,6 +329,22 @@ static struct cpuidle_state atom_cstates[] __initdata = {
{
.enter = NULL }
};
static struct cpuidle_state avn_cstates[CPUIDLE_STATE_MAX] = {
{
.name = "C1-AVN",
.desc = "MWAIT 0x00",
.flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 2,
.target_residency = 2,
.enter = &intel_idle },
{
.name = "C6-AVN",
.desc = "MWAIT 0x51",
.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 15,
.target_residency = 45,
.enter = &intel_idle },
};
/**
* intel_idle
@ -462,6 +478,11 @@ static const struct idle_cpu idle_cpu_hsw = {
.disable_promotion_to_c1e = true,
};
static const struct idle_cpu idle_cpu_avn = {
.state_table = avn_cstates,
.disable_promotion_to_c1e = true,
};
#define ICPU(model, cpu) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
@ -483,6 +504,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
ICPU(0x3f, idle_cpu_hsw),
ICPU(0x45, idle_cpu_hsw),
ICPU(0x46, idle_cpu_hsw),
ICPU(0x4D, idle_cpu_avn),
{}
};
MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);