1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2013 Imagination Technologies 4 * Author: Paul Burton <paul.burton@mips.com> 5 */ 6 7 #ifndef __MIPS_ASM_MIPS_CPS_H__ 8 # error Please include asm/mips-cps.h rather than asm/mips-cpc.h 9 #endif 10 11 #ifndef __MIPS_ASM_MIPS_CPC_H__ 12 #define __MIPS_ASM_MIPS_CPC_H__ 13 14 #include <linux/bitops.h> 15 #include <linux/errno.h> 16 17 /* The base address of the CPC registers */ 18 extern void __iomem *mips_cpc_base; 19 20 /** 21 * mips_cpc_default_phys_base - retrieve the default physical base address of 22 * the CPC 23 * 24 * Returns the default physical base address of the Cluster Power Controller 25 * memory mapped registers. This is platform dependent & must therefore be 26 * implemented per-platform. 27 */ 28 extern phys_addr_t mips_cpc_default_phys_base(void); 29 30 /** 31 * mips_cpc_probe - probe for a Cluster Power Controller 32 * 33 * Attempt to detect the presence of a Cluster Power Controller. Returns 0 if 34 * a CPC is successfully detected, else -errno. 35 */ 36 #ifdef CONFIG_MIPS_CPC 37 extern int mips_cpc_probe(void); 38 #else 39 static inline int mips_cpc_probe(void) 40 { 41 return -ENODEV; 42 } 43 #endif 44 45 /** 46 * mips_cpc_present - determine whether a Cluster Power Controller is present 47 * 48 * Returns true if a CPC is present in the system, else false. 49 */ 50 static inline bool mips_cpc_present(void) 51 { 52 #ifdef CONFIG_MIPS_CPC 53 return mips_cpc_base != NULL; 54 #else 55 return false; 56 #endif 57 } 58 59 /* Offsets from the CPC base address to various control blocks */ 60 #define MIPS_CPC_GCB_OFS 0x0000 61 #define MIPS_CPC_CLCB_OFS 0x2000 62 #define MIPS_CPC_COCB_OFS 0x4000 63 64 #define CPC_ACCESSOR_RO(sz, off, name) \ 65 CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_GCB_OFS + off, name) \ 66 CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_COCB_OFS + off, redir_##name) 67 68 #define CPC_ACCESSOR_RW(sz, off, name) \ 69 CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_GCB_OFS + off, name) \ 70 CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_COCB_OFS + off, redir_##name) 71 72 #define CPC_CX_ACCESSOR_RO(sz, off, name) \ 73 CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_CLCB_OFS + off, cl_##name) \ 74 CPS_ACCESSOR_RO(cpc, sz, MIPS_CPC_COCB_OFS + off, co_##name) 75 76 #define CPC_CX_ACCESSOR_RW(sz, off, name) \ 77 CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_CLCB_OFS + off, cl_##name) \ 78 CPS_ACCESSOR_RW(cpc, sz, MIPS_CPC_COCB_OFS + off, co_##name) 79 80 /* CPC_ACCESS - Control core/IOCU access to CPC registers prior to CM 3 */ 81 CPC_ACCESSOR_RW(32, 0x000, access) 82 83 /* CPC_SEQDEL - Configure delays between command sequencer steps */ 84 CPC_ACCESSOR_RW(32, 0x008, seqdel) 85 86 /* CPC_RAIL - Configure the delay from rail power-up to stability */ 87 CPC_ACCESSOR_RW(32, 0x010, rail) 88 89 /* CPC_RESETLEN - Configure the length of reset sequences */ 90 CPC_ACCESSOR_RW(32, 0x018, resetlen) 91 92 /* CPC_REVISION - Indicates the revisison of the CPC */ 93 CPC_ACCESSOR_RO(32, 0x020, revision) 94 95 /* CPC_PWRUP_CTL - Control power to the Coherence Manager (CM) */ 96 CPC_ACCESSOR_RW(32, 0x030, pwrup_ctl) 97 #define CPC_PWRUP_CTL_CM_PWRUP BIT(0) 98 99 /* CPC_CONFIG - Mirrors GCR_CONFIG */ 100 CPC_ACCESSOR_RW(64, 0x138, config) 101 102 /* CPC_SYS_CONFIG - Control cluster endianness */ 103 CPC_ACCESSOR_RW(32, 0x140, sys_config) 104 #define CPC_SYS_CONFIG_BE_IMMEDIATE BIT(2) 105 #define CPC_SYS_CONFIG_BE_STATUS BIT(1) 106 #define CPC_SYS_CONFIG_BE BIT(0) 107 108 /* CPC_Cx_CMD - Instruct the CPC to take action on a core */ 109 CPC_CX_ACCESSOR_RW(32, 0x000, cmd) 110 #define CPC_Cx_CMD GENMASK(3, 0) 111 #define CPC_Cx_CMD_CLOCKOFF 0x1 112 #define CPC_Cx_CMD_PWRDOWN 0x2 113 #define CPC_Cx_CMD_PWRUP 0x3 114 #define CPC_Cx_CMD_RESET 0x4 115 116 /* CPC_Cx_STAT_CONF - Indicates core configuration & state */ 117 CPC_CX_ACCESSOR_RW(32, 0x008, stat_conf) 118 #define CPC_Cx_STAT_CONF_PWRUPE BIT(23) 119 #define CPC_Cx_STAT_CONF_SEQSTATE GENMASK(22, 19) 120 #define CPC_Cx_STAT_CONF_SEQSTATE_D0 0x0 121 #define CPC_Cx_STAT_CONF_SEQSTATE_U0 0x1 122 #define CPC_Cx_STAT_CONF_SEQSTATE_U1 0x2 123 #define CPC_Cx_STAT_CONF_SEQSTATE_U2 0x3 124 #define CPC_Cx_STAT_CONF_SEQSTATE_U3 0x4 125 #define CPC_Cx_STAT_CONF_SEQSTATE_U4 0x5 126 #define CPC_Cx_STAT_CONF_SEQSTATE_U5 0x6 127 #define CPC_Cx_STAT_CONF_SEQSTATE_U6 0x7 128 #define CPC_Cx_STAT_CONF_SEQSTATE_D1 0x8 129 #define CPC_Cx_STAT_CONF_SEQSTATE_D3 0x9 130 #define CPC_Cx_STAT_CONF_SEQSTATE_D2 0xa 131 #define CPC_Cx_STAT_CONF_CLKGAT_IMPL BIT(17) 132 #define CPC_Cx_STAT_CONF_PWRDN_IMPL BIT(16) 133 #define CPC_Cx_STAT_CONF_EJTAG_PROBE BIT(15) 134 135 /* CPC_Cx_OTHER - Configure the core-other register block prior to CM 3 */ 136 CPC_CX_ACCESSOR_RW(32, 0x010, other) 137 #define CPC_Cx_OTHER_CORENUM GENMASK(23, 16) 138 139 /* CPC_Cx_VP_STOP - Stop Virtual Processors (VPs) within a core from running */ 140 CPC_CX_ACCESSOR_RW(32, 0x020, vp_stop) 141 142 /* CPC_Cx_VP_START - Start Virtual Processors (VPs) within a core running */ 143 CPC_CX_ACCESSOR_RW(32, 0x028, vp_run) 144 145 /* CPC_Cx_VP_RUNNING - Indicate which Virtual Processors (VPs) are running */ 146 CPC_CX_ACCESSOR_RW(32, 0x030, vp_running) 147 148 /* CPC_Cx_CONFIG - Mirrors GCR_Cx_CONFIG */ 149 CPC_CX_ACCESSOR_RW(32, 0x090, config) 150 151 #ifdef CONFIG_MIPS_CPC 152 153 /** 154 * mips_cpc_lock_other - lock access to another core 155 * core: the other core to be accessed 156 * 157 * Call before operating upon a core via the 'other' register region in 158 * order to prevent the region being moved during access. Must be called 159 * within the bounds of a mips_cm_{lock,unlock}_other pair, and followed 160 * by a call to mips_cpc_unlock_other. 161 */ 162 extern void mips_cpc_lock_other(unsigned int core); 163 164 /** 165 * mips_cpc_unlock_other - unlock access to another core 166 * 167 * Call after operating upon another core via the 'other' register region. 168 * Must be called after mips_cpc_lock_other. 169 */ 170 extern void mips_cpc_unlock_other(void); 171 172 #else /* !CONFIG_MIPS_CPC */ 173 174 static inline void mips_cpc_lock_other(unsigned int core) { } 175 static inline void mips_cpc_unlock_other(void) { } 176 177 #endif /* !CONFIG_MIPS_CPC */ 178 179 #endif /* __MIPS_ASM_MIPS_CPC_H__ */ 180