Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 276 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap2/powerdomain.h b/kernel/arch/arm/mach-omap2/powerdomain.h
new file mode 100644
index 000000000..28a796ce0
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/powerdomain.h
@@ -0,0 +1,276 @@
+/*
+ * OMAP2/3/4 powerdomain control
+ *
+ * Copyright (C) 2007-2008, 2010 Texas Instruments, Inc.
+ * Copyright (C) 2007-2011 Nokia Corporation
+ *
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * XXX This should be moved to the mach-omap2/ directory at the earliest
+ * opportunity.
+ */
+
+#ifndef __ARCH_ARM_MACH_OMAP2_POWERDOMAIN_H
+#define __ARCH_ARM_MACH_OMAP2_POWERDOMAIN_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+
+/* Powerdomain basic power states */
+#define PWRDM_POWER_OFF		0x0
+#define PWRDM_POWER_RET		0x1
+#define PWRDM_POWER_INACTIVE	0x2
+#define PWRDM_POWER_ON		0x3
+
+#define PWRDM_MAX_PWRSTS	4
+
+/* Powerdomain allowable state bitfields */
+#define PWRSTS_ON		(1 << PWRDM_POWER_ON)
+#define PWRSTS_INACTIVE		(1 << PWRDM_POWER_INACTIVE)
+#define PWRSTS_RET		(1 << PWRDM_POWER_RET)
+#define PWRSTS_OFF		(1 << PWRDM_POWER_OFF)
+
+#define PWRSTS_OFF_ON		(PWRSTS_OFF | PWRSTS_ON)
+#define PWRSTS_OFF_RET		(PWRSTS_OFF | PWRSTS_RET)
+#define PWRSTS_RET_ON		(PWRSTS_RET | PWRSTS_ON)
+#define PWRSTS_OFF_RET_ON	(PWRSTS_OFF_RET | PWRSTS_ON)
+#define PWRSTS_INA_ON		(PWRSTS_INACTIVE | PWRSTS_ON)
+
+
+/*
+ * Powerdomain flags (struct powerdomain.flags)
+ *
+ * PWRDM_HAS_HDWR_SAR - powerdomain has hardware save-and-restore support
+ *
+ * PWRDM_HAS_MPU_QUIRK - MPU pwr domain has MEM bank 0 bits in MEM
+ * bank 1 position. This is true for OMAP3430
+ *
+ * PWRDM_HAS_LOWPOWERSTATECHANGE - can transition from a sleep state
+ * to a lower sleep state without waking up the powerdomain
+ */
+#define PWRDM_HAS_HDWR_SAR		BIT(0)
+#define PWRDM_HAS_MPU_QUIRK		BIT(1)
+#define PWRDM_HAS_LOWPOWERSTATECHANGE	BIT(2)
+
+/*
+ * Number of memory banks that are power-controllable.	On OMAP4430, the
+ * maximum is 5.
+ */
+#define PWRDM_MAX_MEM_BANKS	5
+
+/*
+ * Maximum number of clockdomains that can be associated with a powerdomain.
+ * PER powerdomain on AM33XX is the worst case
+ */
+#define PWRDM_MAX_CLKDMS	11
+
+/* XXX A completely arbitrary number. What is reasonable here? */
+#define PWRDM_TRANSITION_BAILOUT 100000
+
+struct clockdomain;
+struct powerdomain;
+struct voltagedomain;
+
+/**
+ * struct powerdomain - OMAP powerdomain
+ * @name: Powerdomain name
+ * @voltdm: voltagedomain containing this powerdomain
+ * @prcm_offs: the address offset from CM_BASE/PRM_BASE
+ * @prcm_partition: (OMAP4 only) the PRCM partition ID containing @prcm_offs
+ * @pwrsts: Possible powerdomain power states
+ * @pwrsts_logic_ret: Possible logic power states when pwrdm in RETENTION
+ * @flags: Powerdomain flags
+ * @banks: Number of software-controllable memory banks in this powerdomain
+ * @pwrsts_mem_ret: Possible memory bank pwrstates when pwrdm in RETENTION
+ * @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON
+ * @pwrdm_clkdms: Clockdomains in this powerdomain
+ * @node: list_head linking all powerdomains
+ * @voltdm_node: list_head linking all powerdomains in a voltagedomain
+ * @pwrstctrl_offs: (AM33XX only) XXX_PWRSTCTRL reg offset from prcm_offs
+ * @pwrstst_offs: (AM33XX only) XXX_PWRSTST reg offset from prcm_offs
+ * @logicretstate_mask: (AM33XX only) mask for logic retention bitfield
+ *	in @pwrstctrl_offs
+ * @mem_on_mask: (AM33XX only) mask for mem on bitfield in @pwrstctrl_offs
+ * @mem_ret_mask: (AM33XX only) mask for mem ret bitfield in @pwrstctrl_offs
+ * @mem_pwrst_mask: (AM33XX only) mask for mem state bitfield in @pwrstst_offs
+ * @mem_retst_mask: (AM33XX only) mask for mem retention state bitfield
+ *	in @pwrstctrl_offs
+ * @state:
+ * @state_counter:
+ * @timer:
+ * @state_timer:
+ * @_lock: spinlock used to serialize powerdomain and some clockdomain ops
+ * @_lock_flags: stored flags when @_lock is taken
+ *
+ * @prcm_partition possible values are defined in mach-omap2/prcm44xx.h.
+ */
+struct powerdomain {
+	const char *name;
+	union {
+		const char *name;
+		struct voltagedomain *ptr;
+	} voltdm;
+	const s16 prcm_offs;
+	const u8 pwrsts;
+	const u8 pwrsts_logic_ret;
+	const u8 flags;
+	const u8 banks;
+	const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
+	const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
+	const u8 prcm_partition;
+	struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
+	struct list_head node;
+	struct list_head voltdm_node;
+	int state;
+	unsigned state_counter[PWRDM_MAX_PWRSTS];
+	unsigned ret_logic_off_counter;
+	unsigned ret_mem_off_counter[PWRDM_MAX_MEM_BANKS];
+	spinlock_t _lock;
+	unsigned long _lock_flags;
+	const u8 pwrstctrl_offs;
+	const u8 pwrstst_offs;
+	const u32 logicretstate_mask;
+	const u32 mem_on_mask[PWRDM_MAX_MEM_BANKS];
+	const u32 mem_ret_mask[PWRDM_MAX_MEM_BANKS];
+	const u32 mem_pwrst_mask[PWRDM_MAX_MEM_BANKS];
+	const u32 mem_retst_mask[PWRDM_MAX_MEM_BANKS];
+
+#ifdef CONFIG_PM_DEBUG
+	s64 timer;
+	s64 state_timer[PWRDM_MAX_PWRSTS];
+#endif
+};
+
+/**
+ * struct pwrdm_ops - Arch specific function implementations
+ * @pwrdm_set_next_pwrst: Set the target power state for a pd
+ * @pwrdm_read_next_pwrst: Read the target power state set for a pd
+ * @pwrdm_read_pwrst: Read the current power state of a pd
+ * @pwrdm_read_prev_pwrst: Read the prev power state entered by the pd
+ * @pwrdm_set_logic_retst: Set the logic state in RET for a pd
+ * @pwrdm_set_mem_onst: Set the Memory state in ON for a pd
+ * @pwrdm_set_mem_retst: Set the Memory state in RET for a pd
+ * @pwrdm_read_logic_pwrst: Read the current logic state of a pd
+ * @pwrdm_read_prev_logic_pwrst: Read the previous logic state entered by a pd
+ * @pwrdm_read_logic_retst: Read the logic state in RET for a pd
+ * @pwrdm_read_mem_pwrst: Read the current memory state of a pd
+ * @pwrdm_read_prev_mem_pwrst: Read the previous memory state entered by a pd
+ * @pwrdm_read_mem_retst: Read the memory state in RET for a pd
+ * @pwrdm_clear_all_prev_pwrst: Clear all previous power states logged for a pd
+ * @pwrdm_enable_hdwr_sar: Enable Hardware Save-Restore feature for the pd
+ * @pwrdm_disable_hdwr_sar: Disable Hardware Save-Restore feature for a pd
+ * @pwrdm_set_lowpwrstchange: Enable pd transitions from a shallow to deep sleep
+ * @pwrdm_wait_transition: Wait for a pd state transition to complete
+ * @pwrdm_has_voltdm: Check if a voltdm association is needed
+ *
+ * Regarding @pwrdm_set_lowpwrstchange: On the OMAP2 and 3-family
+ * chips, a powerdomain's power state is not allowed to directly
+ * transition from one low-power state (e.g., CSWR) to another
+ * low-power state (e.g., OFF) without first waking up the
+ * powerdomain.  This wastes energy.  So OMAP4 chips support the
+ * ability to transition a powerdomain power state directly from one
+ * low-power state to another.  The function pointed to by
+ * @pwrdm_set_lowpwrstchange is intended to configure the OMAP4
+ * hardware powerdomain state machine to enable this feature.
+ */
+struct pwrdm_ops {
+	int	(*pwrdm_set_next_pwrst)(struct powerdomain *pwrdm, u8 pwrst);
+	int	(*pwrdm_read_next_pwrst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_read_pwrst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_read_prev_pwrst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_set_logic_retst)(struct powerdomain *pwrdm, u8 pwrst);
+	int	(*pwrdm_set_mem_onst)(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
+	int	(*pwrdm_set_mem_retst)(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
+	int	(*pwrdm_read_logic_pwrst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_read_prev_logic_pwrst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_read_logic_retst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_read_mem_pwrst)(struct powerdomain *pwrdm, u8 bank);
+	int	(*pwrdm_read_prev_mem_pwrst)(struct powerdomain *pwrdm, u8 bank);
+	int	(*pwrdm_read_mem_retst)(struct powerdomain *pwrdm, u8 bank);
+	int	(*pwrdm_clear_all_prev_pwrst)(struct powerdomain *pwrdm);
+	int	(*pwrdm_enable_hdwr_sar)(struct powerdomain *pwrdm);
+	int	(*pwrdm_disable_hdwr_sar)(struct powerdomain *pwrdm);
+	int	(*pwrdm_set_lowpwrstchange)(struct powerdomain *pwrdm);
+	int	(*pwrdm_wait_transition)(struct powerdomain *pwrdm);
+	int	(*pwrdm_has_voltdm)(void);
+};
+
+int pwrdm_register_platform_funcs(struct pwrdm_ops *custom_funcs);
+int pwrdm_register_pwrdms(struct powerdomain **pwrdm_list);
+int pwrdm_complete_init(void);
+
+struct powerdomain *pwrdm_lookup(const char *name);
+
+int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
+			void *user);
+int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user),
+			void *user);
+
+int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
+
+int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
+
+u8 pwrdm_get_valid_lp_state(struct powerdomain *pwrdm,
+			    bool is_logic_state, u8 req_state);
+
+int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
+int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
+int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
+
+int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
+int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
+int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
+
+int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_logic_retst(struct powerdomain *pwrdm);
+int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
+int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
+int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank);
+
+int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
+int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
+bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
+
+int pwrdm_state_switch_nolock(struct powerdomain *pwrdm);
+int pwrdm_state_switch(struct powerdomain *pwrdm);
+int pwrdm_pre_transition(struct powerdomain *pwrdm);
+int pwrdm_post_transition(struct powerdomain *pwrdm);
+int pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
+bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm);
+
+extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state);
+
+extern void omap242x_powerdomains_init(void);
+extern void omap243x_powerdomains_init(void);
+extern void omap3xxx_powerdomains_init(void);
+extern void am33xx_powerdomains_init(void);
+extern void omap44xx_powerdomains_init(void);
+extern void omap54xx_powerdomains_init(void);
+extern void dra7xx_powerdomains_init(void);
+void am43xx_powerdomains_init(void);
+
+extern struct pwrdm_ops omap2_pwrdm_operations;
+extern struct pwrdm_ops omap3_pwrdm_operations;
+extern struct pwrdm_ops am33xx_pwrdm_operations;
+extern struct pwrdm_ops omap4_pwrdm_operations;
+
+/* Common Internal functions used across OMAP rev's */
+extern u32 omap2_pwrdm_get_mem_bank_onstate_mask(u8 bank);
+extern u32 omap2_pwrdm_get_mem_bank_retst_mask(u8 bank);
+extern u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank);
+
+extern struct powerdomain wkup_omap2_pwrdm;
+extern struct powerdomain gfx_omap2_pwrdm;
+
+extern void pwrdm_lock(struct powerdomain *pwrdm);
+extern void pwrdm_unlock(struct powerdomain *pwrdm);
+
+#endif