183 lines
5.8 KiB
C
183 lines
5.8 KiB
C
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/*
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* Copyright (C) 2013 Imagination Technologies
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* Author: Paul Burton <paul.burton@imgtec.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __MIPS_ASM_MIPS_CPC_H__
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#define __MIPS_ASM_MIPS_CPC_H__
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#include <linux/io.h>
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#include <linux/types.h>
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/* The base address of the CPC registers */
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extern void __iomem *mips_cpc_base;
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/**
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* mips_cpc_default_phys_base - retrieve the default physical base address of
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* the CPC
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*
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* Returns the default physical base address of the Cluster Power Controller
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* memory mapped registers. This is platform dependant & must therefore be
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* implemented per-platform.
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*/
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extern phys_t mips_cpc_default_phys_base(void);
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/**
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* mips_cpc_phys_base - retrieve the physical base address of the CPC
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*
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* This function returns the physical base address of the Cluster Power
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* Controller memory mapped registers, or 0 if no Cluster Power Controller
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* is present. It may be overriden by individual platforms which determine
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* this address in a different way.
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*/
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extern phys_t __weak mips_cpc_phys_base(void);
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/**
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* mips_cpc_probe - probe for a Cluster Power Controller
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*
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* Attempt to detect the presence of a Cluster Power Controller. Returns 0 if
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* a CPC is successfully detected, else -errno.
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*/
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#ifdef CONFIG_MIPS_CPC
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extern int mips_cpc_probe(void);
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#else
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static inline int mips_cpc_probe(void)
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{
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return -ENODEV;
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}
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#endif
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/**
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* mips_cpc_present - determine whether a Cluster Power Controller is present
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*
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* Returns true if a CPC is present in the system, else false.
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*/
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static inline bool mips_cpc_present(void)
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{
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#ifdef CONFIG_MIPS_CPC
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return mips_cpc_base != NULL;
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#else
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return false;
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#endif
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}
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/* Offsets from the CPC base address to various control blocks */
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#define MIPS_CPC_GCB_OFS 0x0000
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#define MIPS_CPC_CLCB_OFS 0x2000
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#define MIPS_CPC_COCB_OFS 0x4000
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/* Macros to ease the creation of register access functions */
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#define BUILD_CPC_R_(name, off) \
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static inline u32 *addr_cpc_##name(void) \
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{ \
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return (u32 *)(mips_cpc_base + (off)); \
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} \
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\
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static inline u32 read_cpc_##name(void) \
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{ \
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return __raw_readl(mips_cpc_base + (off)); \
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}
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#define BUILD_CPC__W(name, off) \
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static inline void write_cpc_##name(u32 value) \
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{ \
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__raw_writel(value, mips_cpc_base + (off)); \
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}
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#define BUILD_CPC_RW(name, off) \
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BUILD_CPC_R_(name, off) \
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BUILD_CPC__W(name, off)
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#define BUILD_CPC_Cx_R_(name, off) \
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BUILD_CPC_R_(cl_##name, MIPS_CPC_CLCB_OFS + (off)) \
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BUILD_CPC_R_(co_##name, MIPS_CPC_COCB_OFS + (off))
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#define BUILD_CPC_Cx__W(name, off) \
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BUILD_CPC__W(cl_##name, MIPS_CPC_CLCB_OFS + (off)) \
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BUILD_CPC__W(co_##name, MIPS_CPC_COCB_OFS + (off))
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#define BUILD_CPC_Cx_RW(name, off) \
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BUILD_CPC_Cx_R_(name, off) \
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BUILD_CPC_Cx__W(name, off)
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/* GCB register accessor functions */
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BUILD_CPC_RW(access, MIPS_CPC_GCB_OFS + 0x00)
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BUILD_CPC_RW(seqdel, MIPS_CPC_GCB_OFS + 0x08)
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BUILD_CPC_RW(rail, MIPS_CPC_GCB_OFS + 0x10)
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BUILD_CPC_RW(resetlen, MIPS_CPC_GCB_OFS + 0x18)
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BUILD_CPC_R_(revision, MIPS_CPC_GCB_OFS + 0x20)
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/* Core Local & Core Other accessor functions */
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BUILD_CPC_Cx_RW(cmd, 0x00)
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BUILD_CPC_Cx_RW(stat_conf, 0x08)
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BUILD_CPC_Cx_RW(other, 0x10)
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/* CPC_Cx_CMD register fields */
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#define CPC_Cx_CMD_SHF 0
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#define CPC_Cx_CMD_MSK (_ULCAST_(0xf) << 0)
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#define CPC_Cx_CMD_CLOCKOFF (_ULCAST_(0x1) << 0)
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#define CPC_Cx_CMD_PWRDOWN (_ULCAST_(0x2) << 0)
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#define CPC_Cx_CMD_PWRUP (_ULCAST_(0x3) << 0)
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#define CPC_Cx_CMD_RESET (_ULCAST_(0x4) << 0)
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/* CPC_Cx_STAT_CONF register fields */
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#define CPC_Cx_STAT_CONF_PWRUPE_SHF 23
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#define CPC_Cx_STAT_CONF_PWRUPE_MSK (_ULCAST_(0x1) << 23)
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#define CPC_Cx_STAT_CONF_SEQSTATE_SHF 19
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#define CPC_Cx_STAT_CONF_SEQSTATE_MSK (_ULCAST_(0xf) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_D0 (_ULCAST_(0x0) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U0 (_ULCAST_(0x1) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U1 (_ULCAST_(0x2) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U2 (_ULCAST_(0x3) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U3 (_ULCAST_(0x4) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U4 (_ULCAST_(0x5) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U5 (_ULCAST_(0x6) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_U6 (_ULCAST_(0x7) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_D1 (_ULCAST_(0x8) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_D3 (_ULCAST_(0x9) << 19)
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#define CPC_Cx_STAT_CONF_SEQSTATE_D2 (_ULCAST_(0xa) << 19)
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#define CPC_Cx_STAT_CONF_CLKGAT_IMPL_SHF 17
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#define CPC_Cx_STAT_CONF_CLKGAT_IMPL_MSK (_ULCAST_(0x1) << 17)
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#define CPC_Cx_STAT_CONF_PWRDN_IMPL_SHF 16
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#define CPC_Cx_STAT_CONF_PWRDN_IMPL_MSK (_ULCAST_(0x1) << 16)
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#define CPC_Cx_STAT_CONF_EJTAG_PROBE_SHF 15
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#define CPC_Cx_STAT_CONF_EJTAG_PROBE_MSK (_ULCAST_(0x1) << 15)
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/* CPC_Cx_OTHER register fields */
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#define CPC_Cx_OTHER_CORENUM_SHF 16
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#define CPC_Cx_OTHER_CORENUM_MSK (_ULCAST_(0xff) << 16)
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#ifdef CONFIG_MIPS_CPC
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/**
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* mips_cpc_lock_other - lock access to another core
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* core: the other core to be accessed
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*
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* Call before operating upon a core via the 'other' register region in
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* order to prevent the region being moved during access. Must be followed
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* by a call to mips_cpc_unlock_other.
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*/
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extern void mips_cpc_lock_other(unsigned int core);
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/**
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* mips_cpc_unlock_other - unlock access to another core
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*
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* Call after operating upon another core via the 'other' register region.
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* Must be called after mips_cpc_lock_other.
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*/
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extern void mips_cpc_unlock_other(void);
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#else /* !CONFIG_MIPS_CPC */
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static inline void mips_cpc_lock_other(unsigned int core) { }
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static inline void mips_cpc_unlock_other(void) { }
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#endif /* !CONFIG_MIPS_CPC */
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#endif /* __MIPS_ASM_MIPS_CPC_H__ */
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