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