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/*
* 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__ */
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