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/* SPDX-License-Identifier: GPL-2.0-or-later / / * Copyright (C) 2013 Imagination Technologies * Author: Paul Burton <paul.burton@mips.com> / #ifndef __MIPS_ASM_MIPS_CPS_H__ # error Please include asm/mips-cps.h rather than asm/mips-cm.h #endif #ifndef __MIPS_ASM_MIPS_CM_H__ #define __MIPS_ASM_MIPS_CM_H__ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/errno.h> / The base address of the CM GCR block / extern void __iomem mips_gcr_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 overridden 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_addr_t __mips_cm_phys_base(void); / * mips_cm_is64 - determine CM register width * * The CM register width is determined by the version of the CM, with CM3 * introducing 64 bit GCRs and all prior CM versions having 32 bit GCRs. * However we may run a kernel built for MIPS32 on a system with 64 bit GCRs, * or vice-versa. This variable indicates the width of the memory accesses * that the kernel will perform to GCRs, which may differ from the actual * width of the GCRs. * * It's set to 0 for 32-bit accesses and 1 for 64-bit accesses. / extern int mips_cm_is64; /* * mips_cm_error_report - Report CM cache errors / #ifdef CONFIG_MIPS_CM extern void mips_cm_error_report(void); #else static inline void mips_cm_error_report(void) {} #endif /* * 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_gcr_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 #define GCR_ACCESSOR_RO(sz, off, name) \ CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_GCB_OFS + off, name) \ CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_COCB_OFS + off, redir_##name) #define GCR_ACCESSOR_RW(sz, off, name) \ CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_GCB_OFS + off, name) \ CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_COCB_OFS + off, redir_##name) #define GCR_CX_ACCESSOR_RO(sz, off, name) \ CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_CLCB_OFS + off, cl_##name) \ CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_COCB_OFS + off, co_##name) #define GCR_CX_ACCESSOR_RW(sz, off, name) \ CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_CLCB_OFS + off, cl_##name) \ CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_COCB_OFS + off, co_##name) / GCR_CONFIG - Information about the system / GCR_ACCESSOR_RO(64, 0x000, config) #define CM_GCR_CONFIG_CLUSTER_COH_CAPABLE BIT_ULL(43) #define CM_GCR_CONFIG_CLUSTER_ID GENMASK_ULL(39, 32) #define CM_GCR_CONFIG_NUM_CLUSTERS GENMASK(29, 23) #define CM_GCR_CONFIG_NUMIOCU GENMASK(15, 8) #define CM_GCR_CONFIG_PCORES GENMASK(7, 0) / GCR_BASE - Base address of the Global Configuration Registers (GCRs) / GCR_ACCESSOR_RW(64, 0x008, base) #define CM_GCR_BASE_GCRBASE GENMASK_ULL(47, 15) #define CM_GCR_BASE_CMDEFTGT GENMASK(1, 0) #define CM_GCR_BASE_CMDEFTGT_MEM 0 #define CM_GCR_BASE_CMDEFTGT_RESERVED 1 #define CM_GCR_BASE_CMDEFTGT_IOCU0 2 #define CM_GCR_BASE_CMDEFTGT_IOCU1 3 / GCR_ACCESS - Controls core/IOCU access to GCRs / GCR_ACCESSOR_RW(32, 0x020, access) #define CM_GCR_ACCESS_ACCESSEN GENMASK(7, 0) / GCR_REV - Indicates the Coherence Manager revision / GCR_ACCESSOR_RO(32, 0x030, rev) #define CM_GCR_REV_MAJOR GENMASK(15, 8) #define CM_GCR_REV_MINOR GENMASK(7, 0) #define CM_ENCODE_REV(major, minor) \ (FIELD_PREP(CM_GCR_REV_MAJOR, major) \| \ FIELD_PREP(CM_GCR_REV_MINOR, minor)) #define CM_REV_CM2 CM_ENCODE_REV(6, 0) #define CM_REV_CM2_5 CM_ENCODE_REV(7, 0) #define CM_REV_CM3 CM_ENCODE_REV(8, 0) #define CM_REV_CM3_5 CM_ENCODE_REV(9, 0) / GCR_ERR_CONTROL - Control error checking logic / GCR_ACCESSOR_RW(32, 0x038, err_control) #define CM_GCR_ERR_CONTROL_L2_ECC_EN BIT(1) #define CM_GCR_ERR_CONTROL_L2_ECC_SUPPORT BIT(0) / GCR_ERR_MASK - Control which errors are reported as interrupts / GCR_ACCESSOR_RW(64, 0x040, error_mask) / GCR_ERR_CAUSE - Indicates the type of error that occurred / GCR_ACCESSOR_RW(64, 0x048, error_cause) #define CM_GCR_ERROR_CAUSE_ERRTYPE GENMASK(31, 27) #define CM3_GCR_ERROR_CAUSE_ERRTYPE GENMASK_ULL(63, 58) #define CM_GCR_ERROR_CAUSE_ERRINFO GENMASK(26, 0) / GCR_ERR_ADDR - Indicates the address associated with an error / GCR_ACCESSOR_RW(64, 0x050, error_addr) / GCR_ERR_MULT - Indicates when multiple errors have occurred / GCR_ACCESSOR_RW(64, 0x058, error_mult) #define CM_GCR_ERROR_MULT_ERR2ND GENMASK(4, 0) / GCR_L2_ONLY_SYNC_BASE - Base address of the L2 cache-only sync region / GCR_ACCESSOR_RW(64, 0x070, l2_only_sync_base) #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE GENMASK(31, 12) #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN BIT(0) / GCR_GIC_BASE - Base address of the Global Interrupt Controller (GIC) / GCR_ACCESSOR_RW(64, 0x080, gic_base) #define CM_GCR_GIC_BASE_GICBASE GENMASK(31, 17) #define CM_GCR_GIC_BASE_GICEN BIT(0) / GCR_CPC_BASE - Base address of the Cluster Power Controller (CPC) / GCR_ACCESSOR_RW(64, 0x088, cpc_base) #define CM_GCR_CPC_BASE_CPCBASE GENMASK(31, 15) #define CM_GCR_CPC_BASE_CPCEN BIT(0) / GCR_REGn_BASE - Base addresses of CM address regions / GCR_ACCESSOR_RW(64, 0x090, reg0_base) GCR_ACCESSOR_RW(64, 0x0a0, reg1_base) GCR_ACCESSOR_RW(64, 0x0b0, reg2_base) GCR_ACCESSOR_RW(64, 0x0c0, reg3_base) #define CM_GCR_REGn_BASE_BASEADDR GENMASK(31, 16) / GCR_REGn_MASK - Size & destination of CM address regions / GCR_ACCESSOR_RW(64, 0x098, reg0_mask) GCR_ACCESSOR_RW(64, 0x0a8, reg1_mask) GCR_ACCESSOR_RW(64, 0x0b8, reg2_mask) GCR_ACCESSOR_RW(64, 0x0c8, reg3_mask) #define CM_GCR_REGn_MASK_ADDRMASK GENMASK(31, 16) #define CM_GCR_REGn_MASK_CCAOVR GENMASK(7, 5) #define CM_GCR_REGn_MASK_CCAOVREN BIT(4) #define CM_GCR_REGn_MASK_DROPL2 BIT(2) #define CM_GCR_REGn_MASK_CMTGT GENMASK(1, 0) #define CM_GCR_REGn_MASK_CMTGT_DISABLED 0x0 #define CM_GCR_REGn_MASK_CMTGT_MEM 0x1 #define CM_GCR_REGn_MASK_CMTGT_IOCU0 0x2 #define CM_GCR_REGn_MASK_CMTGT_IOCU1 0x3 / GCR_GIC_STATUS - Indicates presence of a Global Interrupt Controller (GIC) / GCR_ACCESSOR_RO(32, 0x0d0, gic_status) #define CM_GCR_GIC_STATUS_EX BIT(0) / GCR_CPC_STATUS - Indicates presence of a Cluster Power Controller (CPC) / GCR_ACCESSOR_RO(32, 0x0f0, cpc_status) #define CM_GCR_CPC_STATUS_EX BIT(0) / GCR_ACCESS - Controls core/IOCU access to GCRs / GCR_ACCESSOR_RW(32, 0x120, access_cm3) #define CM_GCR_ACCESS_ACCESSEN GENMASK(7, 0) / GCR_L2_CONFIG - Indicates L2 cache configuration when Config5.L2C=1 / GCR_ACCESSOR_RW(32, 0x130, l2_config) #define CM_GCR_L2_CONFIG_BYPASS BIT(20) #define CM_GCR_L2_CONFIG_SET_SIZE GENMASK(15, 12) #define CM_GCR_L2_CONFIG_LINE_SIZE GENMASK(11, 8) #define CM_GCR_L2_CONFIG_ASSOC GENMASK(7, 0) / GCR_SYS_CONFIG2 - Further information about the system / GCR_ACCESSOR_RO(32, 0x150, sys_config2) #define CM_GCR_SYS_CONFIG2_MAXVPW GENMASK(3, 0) / GCR_L2_PFT_CONTROL - Controls hardware L2 prefetching / GCR_ACCESSOR_RW(32, 0x300, l2_pft_control) #define CM_GCR_L2_PFT_CONTROL_PAGEMASK GENMASK(31, 12) #define CM_GCR_L2_PFT_CONTROL_PFTEN BIT(8) #define CM_GCR_L2_PFT_CONTROL_NPFT GENMASK(7, 0) / GCR_L2_PFT_CONTROL_B - Controls hardware L2 prefetching / GCR_ACCESSOR_RW(32, 0x308, l2_pft_control_b) #define CM_GCR_L2_PFT_CONTROL_B_CEN BIT(8) #define CM_GCR_L2_PFT_CONTROL_B_PORTID GENMASK(7, 0) / GCR_L2SM_COP - L2 cache op state machine control / GCR_ACCESSOR_RW(32, 0x620, l2sm_cop) #define CM_GCR_L2SM_COP_PRESENT BIT(31) #define CM_GCR_L2SM_COP_RESULT GENMASK(8, 6) #define CM_GCR_L2SM_COP_RESULT_DONTCARE 0 #define CM_GCR_L2SM_COP_RESULT_DONE_OK 1 #define CM_GCR_L2SM_COP_RESULT_DONE_ERROR 2 #define CM_GCR_L2SM_COP_RESULT_ABORT_OK 3 #define CM_GCR_L2SM_COP_RESULT_ABORT_ERROR 4 #define CM_GCR_L2SM_COP_RUNNING BIT(5) #define CM_GCR_L2SM_COP_TYPE GENMASK(4, 2) #define CM_GCR_L2SM_COP_TYPE_IDX_WBINV 0 #define CM_GCR_L2SM_COP_TYPE_IDX_STORETAG 1 #define CM_GCR_L2SM_COP_TYPE_IDX_STORETAGDATA 2 #define CM_GCR_L2SM_COP_TYPE_HIT_INV 4 #define CM_GCR_L2SM_COP_TYPE_HIT_WBINV 5 #define CM_GCR_L2SM_COP_TYPE_HIT_WB 6 #define CM_GCR_L2SM_COP_TYPE_FETCHLOCK 7 #define CM_GCR_L2SM_COP_CMD GENMASK(1, 0) #define CM_GCR_L2SM_COP_CMD_START 1 / only when idle / #define CM_GCR_L2SM_COP_CMD_ABORT 3 / only when running / / GCR_L2SM_TAG_ADDR_COP - L2 cache op state machine address control / GCR_ACCESSOR_RW(64, 0x628, l2sm_tag_addr_cop) #define CM_GCR_L2SM_TAG_ADDR_COP_NUM_LINES GENMASK_ULL(63, 48) #define CM_GCR_L2SM_TAG_ADDR_COP_START_TAG GENMASK_ULL(47, 6) / GCR_BEV_BASE - Controls the location of the BEV for powered up cores / GCR_ACCESSOR_RW(64, 0x680, bev_base) / GCR_Cx_RESET_RELEASE - Controls core reset for CM 1.x / GCR_CX_ACCESSOR_RW(32, 0x000, reset_release) / GCR_Cx_COHERENCE - Controls core coherence / GCR_CX_ACCESSOR_RW(32, 0x008, coherence) #define CM_GCR_Cx_COHERENCE_COHDOMAINEN GENMASK(7, 0) #define CM3_GCR_Cx_COHERENCE_COHEN BIT(0) / GCR_Cx_CONFIG - Information about a core's configuration / GCR_CX_ACCESSOR_RO(32, 0x010, config) #define CM_GCR_Cx_CONFIG_IOCUTYPE GENMASK(11, 10) #define CM_GCR_Cx_CONFIG_PVPE GENMASK(9, 0) / GCR_Cx_OTHER - Configure the core-other/redirect GCR block / GCR_CX_ACCESSOR_RW(32, 0x018, other) #define CM_GCR_Cx_OTHER_CORENUM GENMASK(31, 16) / CM < 3 / #define CM_GCR_Cx_OTHER_CLUSTER_EN BIT(31) / CM >= 3.5 / #define CM_GCR_Cx_OTHER_GIC_EN BIT(30) / CM >= 3.5 / #define CM_GCR_Cx_OTHER_BLOCK GENMASK(25, 24) / CM >= 3.5 / #define CM_GCR_Cx_OTHER_BLOCK_LOCAL 0 #define CM_GCR_Cx_OTHER_BLOCK_GLOBAL 1 #define CM_GCR_Cx_OTHER_BLOCK_USER 2 #define CM_GCR_Cx_OTHER_BLOCK_GLOBAL_HIGH 3 #define CM_GCR_Cx_OTHER_CLUSTER GENMASK(21, 16) / CM >= 3.5 / #define CM3_GCR_Cx_OTHER_CORE GENMASK(13, 8) / CM >= 3 / #define CM_GCR_Cx_OTHER_CORE_CM 32 #define CM3_GCR_Cx_OTHER_VP GENMASK(2, 0) / CM >= 3 / / GCR_Cx_RESET_BASE - Configure where powered up cores will fetch from / GCR_CX_ACCESSOR_RW(32, 0x020, reset_base) #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE GENMASK(31, 12) / GCR_Cx_ID - Identify the current core / GCR_CX_ACCESSOR_RO(32, 0x028, id) #define CM_GCR_Cx_ID_CLUSTER GENMASK(15, 8) #define CM_GCR_Cx_ID_CORE GENMASK(7, 0) / GCR_Cx_RESET_EXT_BASE - Configure behaviour when cores reset or power up / GCR_CX_ACCESSOR_RW(32, 0x030, reset_ext_base) #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET BIT(31) #define CM_GCR_Cx_RESET_EXT_BASE_UEB BIT(30) #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK GENMASK(27, 20) #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA GENMASK(7, 1) #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT BIT(0) /* * 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; } /* * mips_cm_revision() - return CM revision * * Return: The revision of the CM, from GCR_REV, or 0 if no CM is present. The * return value should be checked against the CM_REV_* macros. / static inline int mips_cm_revision(void) { if (!mips_cm_present()) return 0; return read_gcr_rev(); } /* * mips_cm_max_vp_width() - return the width in bits of VP indices * * Return: the width, in bits, of VP indices in fields that combine core & VP * indices. / static inline unsigned int mips_cm_max_vp_width(void) { extern int smp_num_siblings; if (mips_cm_revision() >= CM_REV_CM3) return FIELD_GET(CM_GCR_SYS_CONFIG2_MAXVPW, read_gcr_sys_config2()); if (mips_cm_present()) { / * We presume that all cores in the system will have the same * number of VP(E)s, and if that ever changes then this will * need revisiting. / return FIELD_GET(CM_GCR_Cx_CONFIG_PVPE, read_gcr_cl_config()) + 1; } if (IS_ENABLED(CONFIG_SMP)) return smp_num_siblings; return 1; } /* * mips_cm_vp_id() - calculate the hardware VP ID for a CPU * @cpu: the CPU whose VP ID to calculate * * Hardware such as the GIC uses identifiers for VPs which may not match the * CPU numbers used by Linux. This function calculates the hardware VP * identifier corresponding to a given CPU. * * Return: the VP ID for the CPU. / static inline unsigned int mips_cm_vp_id(unsigned int cpu) { unsigned int core = cpu_core(&cpu_data[cpu]); unsigned int vp = cpu_vpe_id(&cpu_data[cpu]); return (core mips_cm_max_vp_width()) + vp; } #ifdef CONFIG_MIPS_CM /** * mips_cm_lock_other - lock access to redirect/other region * @cluster: the other cluster to be accessed * @core: the other core to be accessed * @vp: the VP within the other core to be accessed * @block: the register block to be accessed * * Configure the redirect/other region for the local core/VP (depending upon * the CM revision) to target the specified @cluster, @core, @vp & register * @block. Must be called before using the redirect/other region, and followed * by a call to mips_cm_unlock_other() when access to the redirect/other region * is complete. * * This function acquires a spinlock such that code between it & * mips_cm_unlock_other() calls cannot be pre-empted by anything which may * reconfigure the redirect/other region, and cannot be interfered with by * another VP in the core. As such calls to this function should not be nested. / extern void mips_cm_lock_other(unsigned int cluster, unsigned int core, unsigned int vp, unsigned int block); /* * mips_cm_unlock_other - unlock access to redirect/other region * * Must be called after mips_cm_lock_other() once all required access to the * redirect/other region has been completed. / extern void mips_cm_unlock_other(void); #else / !CONFIG_MIPS_CM / static inline void mips_cm_lock_other(unsigned int cluster, unsigned int core, unsigned int vp, unsigned int block) { } static inline void mips_cm_unlock_other(void) { } #endif / !CONFIG_MIPS_CM / /* * mips_cm_lock_other_cpu - lock access to redirect/other region * @cpu: the other CPU whose register we want to access * * Configure the redirect/other region for the local core/VP (depending upon * the CM revision) to target the specified @cpu & register @block. This is * equivalent to calling mips_cm_lock_other() but accepts a Linux CPU number * for convenience. / static inline void mips_cm_lock_other_cpu(unsigned int cpu, unsigned int block) { struct cpuinfo_mips d = &cpu_data[cpu]; mips_cm_lock_other(cpu_cluster(d), cpu_core(d), cpu_vpe_id(d), block); } #endif /* __MIPS_ASM_MIPS_CM_H__ */

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