/* * Copyright (C) 2013 Imagination Technologies * Author: Paul Burton * * 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_CM_H__ #define __MIPS_ASM_MIPS_CM_H__ #include #include /* The base address of the CM GCR block */ extern void __iomem *mips_cm_base; /* The base address of the CM L2-only sync region */ extern void __iomem *mips_cm_l2sync_base; /** * __mips_cm_phys_base - retrieve the physical base address of the CM * * This function returns the physical base address of the Coherence Manager * global control block, or 0 if no Coherence Manager is present. It provides * a default implementation which reads the CMGCRBase register where available, * and may be overriden by platforms which determine this address in a * different way by defining a function with the same prototype except for the * name mips_cm_phys_base (without underscores). */ extern phys_t __mips_cm_phys_base(void); /** * mips_cm_probe - probe for a Coherence Manager * * Attempt to detect the presence of a Coherence Manager. Returns 0 if a CM * is successfully detected, else -errno. */ #ifdef CONFIG_MIPS_CM extern int mips_cm_probe(void); #else static inline int mips_cm_probe(void) { return -ENODEV; } #endif /** * mips_cm_present - determine whether a Coherence Manager is present * * Returns true if a CM is present in the system, else false. */ static inline bool mips_cm_present(void) { #ifdef CONFIG_MIPS_CM return mips_cm_base != NULL; #else return false; #endif } /** * mips_cm_has_l2sync - determine whether an L2-only sync region is present * * Returns true if the system implements an L2-only sync region, else false. */ static inline bool mips_cm_has_l2sync(void) { #ifdef CONFIG_MIPS_CM return mips_cm_l2sync_base != NULL; #else return false; #endif } /* Offsets to register blocks from the CM base address */ #define MIPS_CM_GCB_OFS 0x0000 /* Global Control Block */ #define MIPS_CM_CLCB_OFS 0x2000 /* Core Local Control Block */ #define MIPS_CM_COCB_OFS 0x4000 /* Core Other Control Block */ #define MIPS_CM_GDB_OFS 0x6000 /* Global Debug Block */ /* Total size of the CM memory mapped registers */ #define MIPS_CM_GCR_SIZE 0x8000 /* Size of the L2-only sync region */ #define MIPS_CM_L2SYNC_SIZE 0x1000 /* Macros to ease the creation of register access functions */ #define BUILD_CM_R_(name, off) \ static inline u32 *addr_gcr_##name(void) \ { \ return (u32 *)(mips_cm_base + (off)); \ } \ \ static inline u32 read_gcr_##name(void) \ { \ return readl(addr_gcr_##name()); \ } #define BUILD_CM__W(name, off) \ static inline void write_gcr_##name(u32 value) \ { \ writel(value, addr_gcr_##name()); \ } #define BUILD_CM_RW(name, off) \ BUILD_CM_R_(name, off) \ BUILD_CM__W(name, off) #define BUILD_CM_Cx_R_(name, off) \ BUILD_CM_R_(cl_##name, MIPS_CM_CLCB_OFS + (off)) \ BUILD_CM_R_(co_##name, MIPS_CM_COCB_OFS + (off)) #define BUILD_CM_Cx__W(name, off) \ BUILD_CM__W(cl_##name, MIPS_CM_CLCB_OFS + (off)) \ BUILD_CM__W(co_##name, MIPS_CM_COCB_OFS + (off)) #define BUILD_CM_Cx_RW(name, off) \ BUILD_CM_Cx_R_(name, off) \ BUILD_CM_Cx__W(name, off) /* GCB register accessor functions */ BUILD_CM_R_(config, MIPS_CM_GCB_OFS + 0x00) BUILD_CM_RW(base, MIPS_CM_GCB_OFS + 0x08) BUILD_CM_RW(access, MIPS_CM_GCB_OFS + 0x20) BUILD_CM_R_(rev, MIPS_CM_GCB_OFS + 0x30) BUILD_CM_RW(error_mask, MIPS_CM_GCB_OFS + 0x40) BUILD_CM_RW(error_cause, MIPS_CM_GCB_OFS + 0x48) BUILD_CM_RW(error_addr, MIPS_CM_GCB_OFS + 0x50) BUILD_CM_RW(error_mult, MIPS_CM_GCB_OFS + 0x58) BUILD_CM_RW(l2_only_sync_base, MIPS_CM_GCB_OFS + 0x70) BUILD_CM_RW(gic_base, MIPS_CM_GCB_OFS + 0x80) BUILD_CM_RW(cpc_base, MIPS_CM_GCB_OFS + 0x88) BUILD_CM_RW(reg0_base, MIPS_CM_GCB_OFS + 0x90) BUILD_CM_RW(reg0_mask, MIPS_CM_GCB_OFS + 0x98) BUILD_CM_RW(reg1_base, MIPS_CM_GCB_OFS + 0xa0) BUILD_CM_RW(reg1_mask, MIPS_CM_GCB_OFS + 0xa8) BUILD_CM_RW(reg2_base, MIPS_CM_GCB_OFS + 0xb0) BUILD_CM_RW(reg2_mask, MIPS_CM_GCB_OFS + 0xb8) BUILD_CM_RW(reg3_base, MIPS_CM_GCB_OFS + 0xc0) BUILD_CM_RW(reg3_mask, MIPS_CM_GCB_OFS + 0xc8) BUILD_CM_R_(gic_status, MIPS_CM_GCB_OFS + 0xd0) BUILD_CM_R_(cpc_status, MIPS_CM_GCB_OFS + 0xf0) /* Core Local & Core Other register accessor functions */ BUILD_CM_Cx_RW(reset_release, 0x00) BUILD_CM_Cx_RW(coherence, 0x08) BUILD_CM_Cx_R_(config, 0x10) BUILD_CM_Cx_RW(other, 0x18) BUILD_CM_Cx_RW(reset_base, 0x20) BUILD_CM_Cx_R_(id, 0x28) BUILD_CM_Cx_RW(reset_ext_base, 0x30) BUILD_CM_Cx_R_(tcid_0_priority, 0x40) BUILD_CM_Cx_R_(tcid_1_priority, 0x48) BUILD_CM_Cx_R_(tcid_2_priority, 0x50) BUILD_CM_Cx_R_(tcid_3_priority, 0x58) BUILD_CM_Cx_R_(tcid_4_priority, 0x60) BUILD_CM_Cx_R_(tcid_5_priority, 0x68) BUILD_CM_Cx_R_(tcid_6_priority, 0x70) BUILD_CM_Cx_R_(tcid_7_priority, 0x78) BUILD_CM_Cx_R_(tcid_8_priority, 0x80) /* GCR_CONFIG register fields */ #define CM_GCR_CONFIG_NUMIOCU_SHF 8 #define CM_GCR_CONFIG_NUMIOCU_MSK (_ULCAST_(0xf) << 8) #define CM_GCR_CONFIG_PCORES_SHF 0 #define CM_GCR_CONFIG_PCORES_MSK (_ULCAST_(0xff) << 0) /* GCR_BASE register fields */ #define CM_GCR_BASE_GCRBASE_SHF 15 #define CM_GCR_BASE_GCRBASE_MSK (_ULCAST_(0x1ffff) << 15) #define CM_GCR_BASE_CMDEFTGT_SHF 0 #define CM_GCR_BASE_CMDEFTGT_MSK (_ULCAST_(0x3) << 0) #define CM_GCR_BASE_CMDEFTGT_DISABLED 0 #define CM_GCR_BASE_CMDEFTGT_MEM 1 #define CM_GCR_BASE_CMDEFTGT_IOCU0 2 #define CM_GCR_BASE_CMDEFTGT_IOCU1 3 /* GCR_ACCESS register fields */ #define CM_GCR_ACCESS_ACCESSEN_SHF 0 #define CM_GCR_ACCESS_ACCESSEN_MSK (_ULCAST_(0xff) << 0) /* GCR_REV register fields */ #define CM_GCR_REV_MAJOR_SHF 8 #define CM_GCR_REV_MAJOR_MSK (_ULCAST_(0xff) << 8) #define CM_GCR_REV_MINOR_SHF 0 #define CM_GCR_REV_MINOR_MSK (_ULCAST_(0xff) << 0) /* GCR_ERROR_CAUSE register fields */ #define CM_GCR_ERROR_CAUSE_ERRTYPE_SHF 27 #define CM_GCR_ERROR_CAUSE_ERRTYPE_MSK (_ULCAST_(0x1f) << 27) #define CM_GCR_ERROR_CAUSE_ERRINFO_SHF 0 #define CM_GCR_ERROR_CAUSE_ERRINGO_MSK (_ULCAST_(0x7ffffff) << 0) /* GCR_ERROR_MULT register fields */ #define CM_GCR_ERROR_MULT_ERR2ND_SHF 0 #define CM_GCR_ERROR_MULT_ERR2ND_MSK (_ULCAST_(0x1f) << 0) /* GCR_L2_ONLY_SYNC_BASE register fields */ #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_SHF 12 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_MSK (_ULCAST_(0xfffff) << 12) #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_SHF 0 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_MSK (_ULCAST_(0x1) << 0) /* GCR_GIC_BASE register fields */ #define CM_GCR_GIC_BASE_GICBASE_SHF 17 #define CM_GCR_GIC_BASE_GICBASE_MSK (_ULCAST_(0x7fff) << 17) #define CM_GCR_GIC_BASE_GICEN_SHF 0 #define CM_GCR_GIC_BASE_GICEN_MSK (_ULCAST_(0x1) << 0) /* GCR_CPC_BASE register fields */ #define CM_GCR_CPC_BASE_CPCBASE_SHF 17 #define CM_GCR_CPC_BASE_CPCBASE_MSK (_ULCAST_(0x7fff) << 17) #define CM_GCR_CPC_BASE_CPCEN_SHF 0 #define CM_GCR_CPC_BASE_CPCEN_MSK (_ULCAST_(0x1) << 0) /* GCR_REGn_BASE register fields */ #define CM_GCR_REGn_BASE_BASEADDR_SHF 16 #define CM_GCR_REGn_BASE_BASEADDR_MSK (_ULCAST_(0xffff) << 16) /* GCR_REGn_MASK register fields */ #define CM_GCR_REGn_MASK_ADDRMASK_SHF 16 #define CM_GCR_REGn_MASK_ADDRMASK_MSK (_ULCAST_(0xffff) << 16) #define CM_GCR_REGn_MASK_CCAOVR_SHF 5 #define CM_GCR_REGn_MASK_CCAOVR_MSK (_ULCAST_(0x3) << 5) #define CM_GCR_REGn_MASK_CCAOVREN_SHF 4 #define CM_GCR_REGn_MASK_CCAOVREN_MSK (_ULCAST_(0x1) << 4) #define CM_GCR_REGn_MASK_DROPL2_SHF 2 #define CM_GCR_REGn_MASK_DROPL2_MSK (_ULCAST_(0x1) << 2) #define CM_GCR_REGn_MASK_CMTGT_SHF 0 #define CM_GCR_REGn_MASK_CMTGT_MSK (_ULCAST_(0x3) << 0) #define CM_GCR_REGn_MASK_CMTGT_DISABLED (_ULCAST_(0x0) << 0) #define CM_GCR_REGn_MASK_CMTGT_MEM (_ULCAST_(0x1) << 0) #define CM_GCR_REGn_MASK_CMTGT_IOCU0 (_ULCAST_(0x2) << 0) #define CM_GCR_REGn_MASK_CMTGT_IOCU1 (_ULCAST_(0x3) << 0) /* GCR_GIC_STATUS register fields */ #define CM_GCR_GIC_STATUS_EX_SHF 0 #define CM_GCR_GIC_STATUS_EX_MSK (_ULCAST_(0x1) << 0) /* GCR_CPC_STATUS register fields */ #define CM_GCR_CPC_STATUS_EX_SHF 0 #define CM_GCR_CPC_STATUS_EX_MSK (_ULCAST_(0x1) << 0) /* GCR_Cx_COHERENCE register fields */ #define CM_GCR_Cx_COHERENCE_COHDOMAINEN_SHF 0 #define CM_GCR_Cx_COHERENCE_COHDOMAINEN_MSK (_ULCAST_(0xff) << 0) /* GCR_Cx_CONFIG register fields */ #define CM_GCR_Cx_CONFIG_IOCUTYPE_SHF 10 #define CM_GCR_Cx_CONFIG_IOCUTYPE_MSK (_ULCAST_(0x3) << 10) #define CM_GCR_Cx_CONFIG_PVPE_SHF 0 #define CM_GCR_Cx_CONFIG_PVPE_MSK (_ULCAST_(0x1ff) << 0) /* GCR_Cx_OTHER register fields */ #define CM_GCR_Cx_OTHER_CORENUM_SHF 16 #define CM_GCR_Cx_OTHER_CORENUM_MSK (_ULCAST_(0xffff) << 16) /* GCR_Cx_RESET_BASE register fields */ #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_SHF 12 #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_MSK (_ULCAST_(0xfffff) << 12) /* GCR_Cx_RESET_EXT_BASE register fields */ #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_SHF 31 #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_MSK (_ULCAST_(0x1) << 31) #define CM_GCR_Cx_RESET_EXT_BASE_UEB_SHF 30 #define CM_GCR_Cx_RESET_EXT_BASE_UEB_MSK (_ULCAST_(0x1) << 30) #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_SHF 20 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_MSK (_ULCAST_(0xff) << 20) #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_SHF 1 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_MSK (_ULCAST_(0x7f) << 1) #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_SHF 0 #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_MSK (_ULCAST_(0x1) << 0) /** * mips_cm_numcores - return the number of cores present in the system * * Returns the value of the PCORES field of the GCR_CONFIG register plus 1, or * zero if no Coherence Manager is present. */ static inline unsigned mips_cm_numcores(void) { if (!mips_cm_present()) return 0; return ((read_gcr_config() & CM_GCR_CONFIG_PCORES_MSK) >> CM_GCR_CONFIG_PCORES_SHF) + 1; } /** * mips_cm_numiocu - return the number of IOCUs present in the system * * Returns the value of the NUMIOCU field of the GCR_CONFIG register, or zero * if no Coherence Manager is present. */ static inline unsigned mips_cm_numiocu(void) { if (!mips_cm_present()) return 0; return (read_gcr_config() & CM_GCR_CONFIG_NUMIOCU_MSK) >> CM_GCR_CONFIG_NUMIOCU_SHF; } /** * mips_cm_l2sync - perform an L2-only sync operation * * If an L2-only sync region is present in the system then this function * performs and L2-only sync and returns zero. Otherwise it returns -ENODEV. */ static inline int mips_cm_l2sync(void) { if (!mips_cm_has_l2sync()) return -ENODEV; writel(0, mips_cm_l2sync_base); return 0; } #endif /* __MIPS_ASM_MIPS_CM_H__ */