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Diffstat (limited to '')
| -rw-r--r-- | arch/mips/include/asm/mips-cpc.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mips-cpc.h b/arch/mips/include/asm/mips-cpc.h new file mode 100644 index 000000000..b55e335cf --- /dev/null +++ b/arch/mips/include/asm/mips-cpc.h @@ -0,0 +1,183 @@ +/* + * Copyright (C) 2013 Imagination Technologies + * Author: Paul Burton <paul.burton@mips.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__ */ |