arch/mips/include/asm/mips-cpc.h - arm/linux - Git at Google

 /*
  * Copyright (C) 2013 Imagination Technologies
  * Author: Paul Burton <paul.burton@imgtec.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation;  either version 2 of the  License, or (at your
  * option) any later version.
  */

 #ifndef __MIPS_ASM_MIPS_CPS_H__
 # error Please include asm/mips-cps.h rather than asm/mips-cpc.h
 #endif

 #ifndef __MIPS_ASM_MIPS_CPC_H__
 #define __MIPS_ASM_MIPS_CPC_H__

 #include <linux/bitops.h>
 #include <linux/errno.h>

 /* The base address of the CPC registers */
 extern void __iomem *mips_cpc_base;

 /**
  * mips_cpc_default_phys_base - retrieve the default physical base address of
  *                              the CPC
  *
  * Returns the default physical base address of the Cluster Power Controller
  * memory mapped registers. This is platform dependant & must therefore be
  * implemented per-platform.
  */
 extern phys_addr_t mips_cpc_default_phys_base(void);

 /**
  * mips_cpc_probe - probe for a Cluster Power Controller
  *
  * Attempt to detect the presence of a Cluster Power Controller. Returns 0 if
  * a CPC is successfully detected, else -errno.
  */
 #ifdef CONFIG_MIPS_CPC
 extern int mips_cpc_probe(void);
 #else
 static inline int mips_cpc_probe(void)
 {
 	return -ENODEV;
 }
 #endif

 /**
  * mips_cpc_present - determine whether a Cluster Power Controller is present
  *
  * Returns true if a CPC is present in the system, else false.
  */
 static inline bool mips_cpc_present(void)
 {
 #ifdef CONFIG_MIPS_CPC
 	return mips_cpc_base != NULL;
 #else
 	return false;
 #endif
 }

 /* Offsets from the CPC base address to various control blocks */
 #define MIPS_CPC_GCB_OFS	0x0000
 #define MIPS_CPC_CLCB_OFS	0x2000
 #define MIPS_CPC_COCB_OFS	0x4000

 #define CPC_ACCESSOR_RO(sz, off, name)					\
 	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_GCB_OFS + off, name)		\
 	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_COCB_OFS + off, redir_##name)

 #define CPC_ACCESSOR_RW(sz, off, name)					\
 	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_GCB_OFS + off, name)		\
 	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_COCB_OFS + off, redir_##name)

 #define CPC_CX_ACCESSOR_RO(sz, off, name)				\
 	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_CLCB_OFS + off, cl_##name)	\
 	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_COCB_OFS + off, co_##name)

 #define CPC_CX_ACCESSOR_RW(sz, off, name)				\
 	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_CLCB_OFS + off, cl_##name)	\
 	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_COCB_OFS + off, co_##name)

 /* CPC_ACCESS - Control core/IOCU access to CPC registers prior to CM 3 */
 CPC_ACCESSOR_RW(32, 0x000, access)

 /* CPC_SEQDEL - Configure delays between command sequencer steps */
 CPC_ACCESSOR_RW(32, 0x008, seqdel)

 /* CPC_RAIL - Configure the delay from rail power-up to stability */
 CPC_ACCESSOR_RW(32, 0x010, rail)

 /* CPC_RESETLEN - Configure the length of reset sequences */
 CPC_ACCESSOR_RW(32, 0x018, resetlen)

 /* CPC_REVISION - Indicates the revisison of the CPC */
 CPC_ACCESSOR_RO(32, 0x020, revision)

 /* CPC_PWRUP_CTL - Control power to the Coherence Manager (CM) */
 CPC_ACCESSOR_RW(32, 0x030, pwrup_ctl)
 #define CPC_PWRUP_CTL_CM_PWRUP			BIT(0)

 /* CPC_CONFIG - Mirrors GCR_CONFIG */
 CPC_ACCESSOR_RW(64, 0x138, config)

 /* CPC_SYS_CONFIG - Control cluster endianness */
 CPC_ACCESSOR_RW(32, 0x140, sys_config)
 #define CPC_SYS_CONFIG_BE_IMMEDIATE		BIT(2)
 #define CPC_SYS_CONFIG_BE_STATUS		BIT(1)
 #define CPC_SYS_CONFIG_BE			BIT(0)

 /* CPC_Cx_CMD - Instruct the CPC to take action on a core */
 CPC_CX_ACCESSOR_RW(32, 0x000, cmd)
 #define CPC_Cx_CMD				GENMASK(3, 0)
 #define  CPC_Cx_CMD_CLOCKOFF			0x1
 #define  CPC_Cx_CMD_PWRDOWN			0x2
 #define  CPC_Cx_CMD_PWRUP			0x3
 #define  CPC_Cx_CMD_RESET			0x4

 /* CPC_Cx_STAT_CONF - Indicates core configuration & state */
 CPC_CX_ACCESSOR_RW(32, 0x008, stat_conf)
 #define CPC_Cx_STAT_CONF_PWRUPE			BIT(23)
 #define CPC_Cx_STAT_CONF_SEQSTATE		GENMASK(22, 19)
 #define  CPC_Cx_STAT_CONF_SEQSTATE_D0		0x0
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U0		0x1
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U1		0x2
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U2		0x3
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U3		0x4
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U4		0x5
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U5		0x6
 #define  CPC_Cx_STAT_CONF_SEQSTATE_U6		0x7
 #define  CPC_Cx_STAT_CONF_SEQSTATE_D1		0x8
 #define  CPC_Cx_STAT_CONF_SEQSTATE_D3		0x9
 #define  CPC_Cx_STAT_CONF_SEQSTATE_D2		0xa
 #define CPC_Cx_STAT_CONF_CLKGAT_IMPL		BIT(17)
 #define CPC_Cx_STAT_CONF_PWRDN_IMPL		BIT(16)
 #define CPC_Cx_STAT_CONF_EJTAG_PROBE		BIT(15)

 /* CPC_Cx_OTHER - Configure the core-other register block prior to CM 3 */
 CPC_CX_ACCESSOR_RW(32, 0x010, other)
 #define CPC_Cx_OTHER_CORENUM			GENMASK(23, 16)

 /* CPC_Cx_VP_STOP - Stop Virtual Processors (VPs) within a core from running */
 CPC_CX_ACCESSOR_RW(32, 0x020, vp_stop)

 /* CPC_Cx_VP_START - Start Virtual Processors (VPs) within a core running */
 CPC_CX_ACCESSOR_RW(32, 0x028, vp_run)

 /* CPC_Cx_VP_RUNNING - Indicate which Virtual Processors (VPs) are running */
 CPC_CX_ACCESSOR_RW(32, 0x030, vp_running)

 /* CPC_Cx_CONFIG - Mirrors GCR_Cx_CONFIG */
 CPC_CX_ACCESSOR_RW(32, 0x090, config)

 #ifdef CONFIG_MIPS_CPC

 /**
  * mips_cpc_lock_other - lock access to another core
  * core: the other core to be accessed
  *
  * Call before operating upon a core via the 'other' register region in
  * order to prevent the region being moved during access. Must be called
  * within the bounds of a mips_cm_{lock,unlock}_other pair, and followed
  * by a call to mips_cpc_unlock_other.
  */
 extern void mips_cpc_lock_other(unsigned int core);

 /**
  * mips_cpc_unlock_other - unlock access to another core
  *
  * Call after operating upon another core via the 'other' register region.
  * Must be called after mips_cpc_lock_other.
  */
 extern void mips_cpc_unlock_other(void);

 #else /* !CONFIG_MIPS_CPC */

 static inline void mips_cpc_lock_other(unsigned int core) { }
 static inline void mips_cpc_unlock_other(void) { }

 #endif /* !CONFIG_MIPS_CPC */

 #endif /* __MIPS_ASM_MIPS_CPC_H__ */
	/*
	* Copyright (C) 2013 Imagination Technologies
	* Author: Paul Burton <paul.burton@imgtec.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*/

	#ifndef __MIPS_ASM_MIPS_CPS_H__
	# error Please include asm/mips-cps.h rather than asm/mips-cpc.h
	#endif

	#ifndef __MIPS_ASM_MIPS_CPC_H__
	#define __MIPS_ASM_MIPS_CPC_H__

	#include <linux/bitops.h>
	#include <linux/errno.h>

	/* The base address of the CPC registers */
	extern void __iomem *mips_cpc_base;

	/**
	* mips_cpc_default_phys_base - retrieve the default physical base address of
	* the CPC
	*
	* Returns the default physical base address of the Cluster Power Controller
	* memory mapped registers. This is platform dependant & must therefore be
	* implemented per-platform.
	*/
	extern phys_addr_t mips_cpc_default_phys_base(void);

	/**
	* mips_cpc_probe - probe for a Cluster Power Controller
	*
	* Attempt to detect the presence of a Cluster Power Controller. Returns 0 if
	* a CPC is successfully detected, else -errno.
	*/
	#ifdef CONFIG_MIPS_CPC
	extern int mips_cpc_probe(void);
	#else
	static inline int mips_cpc_probe(void)
	{
	return -ENODEV;
	}
	#endif

	/**
	* mips_cpc_present - determine whether a Cluster Power Controller is present
	*
	* Returns true if a CPC is present in the system, else false.
	*/
	static inline bool mips_cpc_present(void)
	{
	#ifdef CONFIG_MIPS_CPC
	return mips_cpc_base != NULL;
	#else
	return false;
	#endif
	}

	/* Offsets from the CPC base address to various control blocks */
	#define MIPS_CPC_GCB_OFS 0x0000
	#define MIPS_CPC_CLCB_OFS 0x2000
	#define MIPS_CPC_COCB_OFS 0x4000

	#define CPC_ACCESSOR_RO(sz, off, name) \
	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_GCB_OFS + off, name) \
	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_COCB_OFS + off, redir_##name)

	#define CPC_ACCESSOR_RW(sz, off, name) \
	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_GCB_OFS + off, name) \
	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_COCB_OFS + off, redir_##name)

	#define CPC_CX_ACCESSOR_RO(sz, off, name) \
	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_CLCB_OFS + off, cl_##name) \
	CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_COCB_OFS + off, co_##name)

	#define CPC_CX_ACCESSOR_RW(sz, off, name) \
	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_CLCB_OFS + off, cl_##name) \
	CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_COCB_OFS + off, co_##name)

	/* CPC_ACCESS - Control core/IOCU access to CPC registers prior to CM 3 */
	CPC_ACCESSOR_RW(32, 0x000, access)

	/* CPC_SEQDEL - Configure delays between command sequencer steps */
	CPC_ACCESSOR_RW(32, 0x008, seqdel)

	/* CPC_RAIL - Configure the delay from rail power-up to stability */
	CPC_ACCESSOR_RW(32, 0x010, rail)

	/* CPC_RESETLEN - Configure the length of reset sequences */
	CPC_ACCESSOR_RW(32, 0x018, resetlen)

	/* CPC_REVISION - Indicates the revisison of the CPC */
	CPC_ACCESSOR_RO(32, 0x020, revision)

	/* CPC_PWRUP_CTL - Control power to the Coherence Manager (CM) */
	CPC_ACCESSOR_RW(32, 0x030, pwrup_ctl)
	#define CPC_PWRUP_CTL_CM_PWRUP BIT(0)

	/* CPC_CONFIG - Mirrors GCR_CONFIG */
	CPC_ACCESSOR_RW(64, 0x138, config)

	/* CPC_SYS_CONFIG - Control cluster endianness */
	CPC_ACCESSOR_RW(32, 0x140, sys_config)
	#define CPC_SYS_CONFIG_BE_IMMEDIATE BIT(2)
	#define CPC_SYS_CONFIG_BE_STATUS BIT(1)
	#define CPC_SYS_CONFIG_BE BIT(0)

	/* CPC_Cx_CMD - Instruct the CPC to take action on a core */
	CPC_CX_ACCESSOR_RW(32, 0x000, cmd)
	#define CPC_Cx_CMD GENMASK(3, 0)
	#define CPC_Cx_CMD_CLOCKOFF 0x1
	#define CPC_Cx_CMD_PWRDOWN 0x2
	#define CPC_Cx_CMD_PWRUP 0x3
	#define CPC_Cx_CMD_RESET 0x4

	/* CPC_Cx_STAT_CONF - Indicates core configuration & state */
	CPC_CX_ACCESSOR_RW(32, 0x008, stat_conf)
	#define CPC_Cx_STAT_CONF_PWRUPE BIT(23)
	#define CPC_Cx_STAT_CONF_SEQSTATE GENMASK(22, 19)
	#define CPC_Cx_STAT_CONF_SEQSTATE_D0 0x0
	#define CPC_Cx_STAT_CONF_SEQSTATE_U0 0x1
	#define CPC_Cx_STAT_CONF_SEQSTATE_U1 0x2
	#define CPC_Cx_STAT_CONF_SEQSTATE_U2 0x3
	#define CPC_Cx_STAT_CONF_SEQSTATE_U3 0x4
	#define CPC_Cx_STAT_CONF_SEQSTATE_U4 0x5
	#define CPC_Cx_STAT_CONF_SEQSTATE_U5 0x6
	#define CPC_Cx_STAT_CONF_SEQSTATE_U6 0x7
	#define CPC_Cx_STAT_CONF_SEQSTATE_D1 0x8
	#define CPC_Cx_STAT_CONF_SEQSTATE_D3 0x9
	#define CPC_Cx_STAT_CONF_SEQSTATE_D2 0xa
	#define CPC_Cx_STAT_CONF_CLKGAT_IMPL BIT(17)
	#define CPC_Cx_STAT_CONF_PWRDN_IMPL BIT(16)
	#define CPC_Cx_STAT_CONF_EJTAG_PROBE BIT(15)

	/* CPC_Cx_OTHER - Configure the core-other register block prior to CM 3 */
	CPC_CX_ACCESSOR_RW(32, 0x010, other)
	#define CPC_Cx_OTHER_CORENUM GENMASK(23, 16)

	/* CPC_Cx_VP_STOP - Stop Virtual Processors (VPs) within a core from running */
	CPC_CX_ACCESSOR_RW(32, 0x020, vp_stop)

	/* CPC_Cx_VP_START - Start Virtual Processors (VPs) within a core running */
	CPC_CX_ACCESSOR_RW(32, 0x028, vp_run)

	/* CPC_Cx_VP_RUNNING - Indicate which Virtual Processors (VPs) are running */
	CPC_CX_ACCESSOR_RW(32, 0x030, vp_running)

	/* CPC_Cx_CONFIG - Mirrors GCR_Cx_CONFIG */
	CPC_CX_ACCESSOR_RW(32, 0x090, config)

	#ifdef CONFIG_MIPS_CPC

	/**
	* mips_cpc_lock_other - lock access to another core
	* core: the other core to be accessed
	*
	* Call before operating upon a core via the 'other' register region in
	* order to prevent the region being moved during access. Must be called
	* within the bounds of a mips_cm_{lock,unlock}_other pair, and followed
	* by a call to mips_cpc_unlock_other.
	*/
	extern void mips_cpc_lock_other(unsigned int core);

	/**
	* mips_cpc_unlock_other - unlock access to another core
	*
	* Call after operating upon another core via the 'other' register region.
	* Must be called after mips_cpc_lock_other.
	*/
	extern void mips_cpc_unlock_other(void);

	#else /* !CONFIG_MIPS_CPC */

	static inline void mips_cpc_lock_other(unsigned int core) { }
	static inline void mips_cpc_unlock_other(void) { }

	#endif /* !CONFIG_MIPS_CPC */

	#endif /* __MIPS_ASM_MIPS_CPC_H__ */