arch/mips/include/asm/mips-cm.h

   1 /*
   2  * Copyright (C) 2013 Imagination Technologies
   3  * Author: Paul Burton <paul.burton@imgtec.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation;  either version 2 of the  License, or (at your
   8  * option) any later version.
   9  */
  10
  11 #ifndef __MIPS_ASM_MIPS_CM_H__
  12 #define __MIPS_ASM_MIPS_CM_H__
  13
  14 #include <linux/errno.h>
  15 #include <linux/io.h>
  16 #include <linux/types.h>
  17
  18 /* The base address of the CM GCR block */
  19 extern void __iomem *mips_cm_base;
  20
  21 /* The base address of the CM L2-only sync region */
  22 extern void __iomem *mips_cm_l2sync_base;
  23
  24 /**
  25  * __mips_cm_phys_base - retrieve the physical base address of the CM
  26  *
  27  * This function returns the physical base address of the Coherence Manager
  28  * global control block, or 0 if no Coherence Manager is present. It provides
  29  * a default implementation which reads the CMGCRBase register where available,
  30  * and may be overriden by platforms which determine this address in a
  31  * different way by defining a function with the same prototype except for the
  32  * name mips_cm_phys_base (without underscores).
  33  */
  34 extern phys_addr_t __mips_cm_phys_base(void);
  35
  36 /**
  37  * mips_cm_probe - probe for a Coherence Manager
  38  *
  39  * Attempt to detect the presence of a Coherence Manager. Returns 0 if a CM
  40  * is successfully detected, else -errno.
  41  */
  42 #ifdef CONFIG_MIPS_CM
  43 extern int mips_cm_probe(void);
  44 #else
  45 static inline int mips_cm_probe(void)
  46 {
  47         return -ENODEV;
  48 }
  49 #endif
  50
  51 /**
  52  * mips_cm_present - determine whether a Coherence Manager is present
  53  *
  54  * Returns true if a CM is present in the system, else false.
  55  */
  56 static inline bool mips_cm_present(void)
  57 {
  58 #ifdef CONFIG_MIPS_CM
  59         return mips_cm_base != NULL;
  60 #else
  61         return false;
  62 #endif
  63 }
  64
  65 /**
  66  * mips_cm_has_l2sync - determine whether an L2-only sync region is present
  67  *
  68  * Returns true if the system implements an L2-only sync region, else false.
  69  */
  70 static inline bool mips_cm_has_l2sync(void)
  71 {
  72 #ifdef CONFIG_MIPS_CM
  73         return mips_cm_l2sync_base != NULL;
  74 #else
  75         return false;
  76 #endif
  77 }
  78
  79 /* Offsets to register blocks from the CM base address */
  80 #define MIPS_CM_GCB_OFS         0x0000 /* Global Control Block */
  81 #define MIPS_CM_CLCB_OFS        0x2000 /* Core Local Control Block */
  82 #define MIPS_CM_COCB_OFS        0x4000 /* Core Other Control Block */
  83 #define MIPS_CM_GDB_OFS         0x6000 /* Global Debug Block */
  84
  85 /* Total size of the CM memory mapped registers */
  86 #define MIPS_CM_GCR_SIZE        0x8000
  87
  88 /* Size of the L2-only sync region */
  89 #define MIPS_CM_L2SYNC_SIZE     0x1000
  90
  91 /* Macros to ease the creation of register access functions */
  92 #define BUILD_CM_R_(name, off)                                  \
  93 static inline u32 __iomem *addr_gcr_##name(void)                \
  94 {                                                               \
  95         return (u32 __iomem *)(mips_cm_base + (off));           \
  96 }                                                               \
  97                                                                 \
  98 static inline u32 read_gcr_##name(void)                         \
  99 {                                                               \
 100         return __raw_readl(addr_gcr_##name());                  \
 101 }
 102
 103 #define BUILD_CM__W(name, off)                                  \
 104 static inline void write_gcr_##name(u32 value)                  \
 105 {                                                               \
 106         __raw_writel(value, addr_gcr_##name());                 \
 107 }
 108
 109 #define BUILD_CM_RW(name, off)                                  \
 110         BUILD_CM_R_(name, off)                                  \
 111         BUILD_CM__W(name, off)
 112
 113 #define BUILD_CM_Cx_R_(name, off)                               \
 114         BUILD_CM_R_(cl_##name, MIPS_CM_CLCB_OFS + (off))        \
 115         BUILD_CM_R_(co_##name, MIPS_CM_COCB_OFS + (off))
 116
 117 #define BUILD_CM_Cx__W(name, off)                               \
 118         BUILD_CM__W(cl_##name, MIPS_CM_CLCB_OFS + (off))        \
 119         BUILD_CM__W(co_##name, MIPS_CM_COCB_OFS + (off))
 120
 121 #define BUILD_CM_Cx_RW(name, off)                               \
 122         BUILD_CM_Cx_R_(name, off)                               \
 123         BUILD_CM_Cx__W(name, off)
 124
 125 /* GCB register accessor functions */
 126 BUILD_CM_R_(config,             MIPS_CM_GCB_OFS + 0x00)
 127 BUILD_CM_RW(base,               MIPS_CM_GCB_OFS + 0x08)
 128 BUILD_CM_RW(access,             MIPS_CM_GCB_OFS + 0x20)
 129 BUILD_CM_R_(rev,                MIPS_CM_GCB_OFS + 0x30)
 130 BUILD_CM_RW(error_mask,         MIPS_CM_GCB_OFS + 0x40)
 131 BUILD_CM_RW(error_cause,        MIPS_CM_GCB_OFS + 0x48)
 132 BUILD_CM_RW(error_addr,         MIPS_CM_GCB_OFS + 0x50)
 133 BUILD_CM_RW(error_mult,         MIPS_CM_GCB_OFS + 0x58)
 134 BUILD_CM_RW(l2_only_sync_base,  MIPS_CM_GCB_OFS + 0x70)
 135 BUILD_CM_RW(gic_base,           MIPS_CM_GCB_OFS + 0x80)
 136 BUILD_CM_RW(cpc_base,           MIPS_CM_GCB_OFS + 0x88)
 137 BUILD_CM_RW(reg0_base,          MIPS_CM_GCB_OFS + 0x90)
 138 BUILD_CM_RW(reg0_mask,          MIPS_CM_GCB_OFS + 0x98)
 139 BUILD_CM_RW(reg1_base,          MIPS_CM_GCB_OFS + 0xa0)
 140 BUILD_CM_RW(reg1_mask,          MIPS_CM_GCB_OFS + 0xa8)
 141 BUILD_CM_RW(reg2_base,          MIPS_CM_GCB_OFS + 0xb0)
 142 BUILD_CM_RW(reg2_mask,          MIPS_CM_GCB_OFS + 0xb8)
 143 BUILD_CM_RW(reg3_base,          MIPS_CM_GCB_OFS + 0xc0)
 144 BUILD_CM_RW(reg3_mask,          MIPS_CM_GCB_OFS + 0xc8)
 145 BUILD_CM_R_(gic_status,         MIPS_CM_GCB_OFS + 0xd0)
 146 BUILD_CM_R_(cpc_status,         MIPS_CM_GCB_OFS + 0xf0)
 147
 148 /* Core Local & Core Other register accessor functions */
 149 BUILD_CM_Cx_RW(reset_release,   0x00)
 150 BUILD_CM_Cx_RW(coherence,       0x08)
 151 BUILD_CM_Cx_R_(config,          0x10)
 152 BUILD_CM_Cx_RW(other,           0x18)
 153 BUILD_CM_Cx_RW(reset_base,      0x20)
 154 BUILD_CM_Cx_R_(id,              0x28)
 155 BUILD_CM_Cx_RW(reset_ext_base,  0x30)
 156 BUILD_CM_Cx_R_(tcid_0_priority, 0x40)
 157 BUILD_CM_Cx_R_(tcid_1_priority, 0x48)
 158 BUILD_CM_Cx_R_(tcid_2_priority, 0x50)
 159 BUILD_CM_Cx_R_(tcid_3_priority, 0x58)
 160 BUILD_CM_Cx_R_(tcid_4_priority, 0x60)
 161 BUILD_CM_Cx_R_(tcid_5_priority, 0x68)
 162 BUILD_CM_Cx_R_(tcid_6_priority, 0x70)
 163 BUILD_CM_Cx_R_(tcid_7_priority, 0x78)
 164 BUILD_CM_Cx_R_(tcid_8_priority, 0x80)
 165
 166 /* GCR_CONFIG register fields */
 167 #define CM_GCR_CONFIG_NUMIOCU_SHF               8
 168 #define CM_GCR_CONFIG_NUMIOCU_MSK               (_ULCAST_(0xf) << 8)
 169 #define CM_GCR_CONFIG_PCORES_SHF                0
 170 #define CM_GCR_CONFIG_PCORES_MSK                (_ULCAST_(0xff) << 0)
 171
 172 /* GCR_BASE register fields */
 173 #define CM_GCR_BASE_GCRBASE_SHF                 15
 174 #define CM_GCR_BASE_GCRBASE_MSK                 (_ULCAST_(0x1ffff) << 15)
 175 #define CM_GCR_BASE_CMDEFTGT_SHF                0
 176 #define CM_GCR_BASE_CMDEFTGT_MSK                (_ULCAST_(0x3) << 0)
 177 #define  CM_GCR_BASE_CMDEFTGT_DISABLED          0
 178 #define  CM_GCR_BASE_CMDEFTGT_MEM               1
 179 #define  CM_GCR_BASE_CMDEFTGT_IOCU0             2
 180 #define  CM_GCR_BASE_CMDEFTGT_IOCU1             3
 181
 182 /* GCR_ACCESS register fields */
 183 #define CM_GCR_ACCESS_ACCESSEN_SHF              0
 184 #define CM_GCR_ACCESS_ACCESSEN_MSK              (_ULCAST_(0xff) << 0)
 185
 186 /* GCR_REV register fields */
 187 #define CM_GCR_REV_MAJOR_SHF                    8
 188 #define CM_GCR_REV_MAJOR_MSK                    (_ULCAST_(0xff) << 8)
 189 #define CM_GCR_REV_MINOR_SHF                    0
 190 #define CM_GCR_REV_MINOR_MSK                    (_ULCAST_(0xff) << 0)
 191
 192 /* GCR_ERROR_CAUSE register fields */
 193 #define CM_GCR_ERROR_CAUSE_ERRTYPE_SHF          27
 194 #define CM_GCR_ERROR_CAUSE_ERRTYPE_MSK          (_ULCAST_(0x1f) << 27)
 195 #define CM_GCR_ERROR_CAUSE_ERRINFO_SHF          0
 196 #define CM_GCR_ERROR_CAUSE_ERRINGO_MSK          (_ULCAST_(0x7ffffff) << 0)
 197
 198 /* GCR_ERROR_MULT register fields */
 199 #define CM_GCR_ERROR_MULT_ERR2ND_SHF            0
 200 #define CM_GCR_ERROR_MULT_ERR2ND_MSK            (_ULCAST_(0x1f) << 0)
 201
 202 /* GCR_L2_ONLY_SYNC_BASE register fields */
 203 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_SHF   12
 204 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_MSK   (_ULCAST_(0xfffff) << 12)
 205 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_SHF     0
 206 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_MSK     (_ULCAST_(0x1) << 0)
 207
 208 /* GCR_GIC_BASE register fields */
 209 #define CM_GCR_GIC_BASE_GICBASE_SHF             17
 210 #define CM_GCR_GIC_BASE_GICBASE_MSK             (_ULCAST_(0x7fff) << 17)
 211 #define CM_GCR_GIC_BASE_GICEN_SHF               0
 212 #define CM_GCR_GIC_BASE_GICEN_MSK               (_ULCAST_(0x1) << 0)
 213
 214 /* GCR_CPC_BASE register fields */
 215 #define CM_GCR_CPC_BASE_CPCBASE_SHF             17
 216 #define CM_GCR_CPC_BASE_CPCBASE_MSK             (_ULCAST_(0x7fff) << 17)
 217 #define CM_GCR_CPC_BASE_CPCEN_SHF               0
 218 #define CM_GCR_CPC_BASE_CPCEN_MSK               (_ULCAST_(0x1) << 0)
 219
 220 /* GCR_GIC_STATUS register fields */
 221 #define CM_GCR_GIC_STATUS_GICEX_SHF             0
 222 #define CM_GCR_GIC_STATUS_GICEX_MSK             (_ULCAST_(0x1) << 0)
 223
 224 /* GCR_REGn_BASE register fields */
 225 #define CM_GCR_REGn_BASE_BASEADDR_SHF           16
 226 #define CM_GCR_REGn_BASE_BASEADDR_MSK           (_ULCAST_(0xffff) << 16)
 227
 228 /* GCR_REGn_MASK register fields */
 229 #define CM_GCR_REGn_MASK_ADDRMASK_SHF           16
 230 #define CM_GCR_REGn_MASK_ADDRMASK_MSK           (_ULCAST_(0xffff) << 16)
 231 #define CM_GCR_REGn_MASK_CCAOVR_SHF             5
 232 #define CM_GCR_REGn_MASK_CCAOVR_MSK             (_ULCAST_(0x3) << 5)
 233 #define CM_GCR_REGn_MASK_CCAOVREN_SHF           4
 234 #define CM_GCR_REGn_MASK_CCAOVREN_MSK           (_ULCAST_(0x1) << 4)
 235 #define CM_GCR_REGn_MASK_DROPL2_SHF             2
 236 #define CM_GCR_REGn_MASK_DROPL2_MSK             (_ULCAST_(0x1) << 2)
 237 #define CM_GCR_REGn_MASK_CMTGT_SHF              0
 238 #define CM_GCR_REGn_MASK_CMTGT_MSK              (_ULCAST_(0x3) << 0)
 239 #define  CM_GCR_REGn_MASK_CMTGT_DISABLED        (_ULCAST_(0x0) << 0)
 240 #define  CM_GCR_REGn_MASK_CMTGT_MEM             (_ULCAST_(0x1) << 0)
 241 #define  CM_GCR_REGn_MASK_CMTGT_IOCU0           (_ULCAST_(0x2) << 0)
 242 #define  CM_GCR_REGn_MASK_CMTGT_IOCU1           (_ULCAST_(0x3) << 0)
 243
 244 /* GCR_GIC_STATUS register fields */
 245 #define CM_GCR_GIC_STATUS_EX_SHF                0
 246 #define CM_GCR_GIC_STATUS_EX_MSK                (_ULCAST_(0x1) << 0)
 247
 248 /* GCR_CPC_STATUS register fields */
 249 #define CM_GCR_CPC_STATUS_EX_SHF                0
 250 #define CM_GCR_CPC_STATUS_EX_MSK                (_ULCAST_(0x1) << 0)
 251
 252 /* GCR_Cx_COHERENCE register fields */
 253 #define CM_GCR_Cx_COHERENCE_COHDOMAINEN_SHF     0
 254 #define CM_GCR_Cx_COHERENCE_COHDOMAINEN_MSK     (_ULCAST_(0xff) << 0)
 255
 256 /* GCR_Cx_CONFIG register fields */
 257 #define CM_GCR_Cx_CONFIG_IOCUTYPE_SHF           10
 258 #define CM_GCR_Cx_CONFIG_IOCUTYPE_MSK           (_ULCAST_(0x3) << 10)
 259 #define CM_GCR_Cx_CONFIG_PVPE_SHF               0
 260 #define CM_GCR_Cx_CONFIG_PVPE_MSK               (_ULCAST_(0x1ff) << 0)
 261
 262 /* GCR_Cx_OTHER register fields */
 263 #define CM_GCR_Cx_OTHER_CORENUM_SHF             16
 264 #define CM_GCR_Cx_OTHER_CORENUM_MSK             (_ULCAST_(0xffff) << 16)
 265
 266 /* GCR_Cx_RESET_BASE register fields */
 267 #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_SHF     12
 268 #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_MSK     (_ULCAST_(0xfffff) << 12)
 269
 270 /* GCR_Cx_RESET_EXT_BASE register fields */
 271 #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_SHF   31
 272 #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_MSK   (_ULCAST_(0x1) << 31)
 273 #define CM_GCR_Cx_RESET_EXT_BASE_UEB_SHF        30
 274 #define CM_GCR_Cx_RESET_EXT_BASE_UEB_MSK        (_ULCAST_(0x1) << 30)
 275 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_SHF 20
 276 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_MSK (_ULCAST_(0xff) << 20)
 277 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_SHF   1
 278 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_MSK   (_ULCAST_(0x7f) << 1)
 279 #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_SHF    0
 280 #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_MSK    (_ULCAST_(0x1) << 0)
 281
 282 /**
 283  * mips_cm_numcores - return the number of cores present in the system
 284  *
 285  * Returns the value of the PCORES field of the GCR_CONFIG register plus 1, or
 286  * zero if no Coherence Manager is present.
 287  */
 288 static inline unsigned mips_cm_numcores(void)
 289 {
 290         if (!mips_cm_present())
 291                 return 0;
 292
 293         return ((read_gcr_config() & CM_GCR_CONFIG_PCORES_MSK)
 294                 >> CM_GCR_CONFIG_PCORES_SHF) + 1;
 295 }
 296
 297 /**
 298  * mips_cm_numiocu - return the number of IOCUs present in the system
 299  *
 300  * Returns the value of the NUMIOCU field of the GCR_CONFIG register, or zero
 301  * if no Coherence Manager is present.
 302  */
 303 static inline unsigned mips_cm_numiocu(void)
 304 {
 305         if (!mips_cm_present())
 306                 return 0;
 307
 308         return (read_gcr_config() & CM_GCR_CONFIG_NUMIOCU_MSK)
 309                 >> CM_GCR_CONFIG_NUMIOCU_SHF;
 310 }
 311
 312 /**
 313  * mips_cm_l2sync - perform an L2-only sync operation
 314  *
 315  * If an L2-only sync region is present in the system then this function
 316  * performs and L2-only sync and returns zero. Otherwise it returns -ENODEV.
 317  */
 318 static inline int mips_cm_l2sync(void)
 319 {
 320         if (!mips_cm_has_l2sync())
 321                 return -ENODEV;
 322
 323         writel(0, mips_cm_l2sync_base);
 324         return 0;
 325 }
 326
 327 #endif /* __MIPS_ASM_MIPS_CM_H__ */