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kernel-ark/arch/mips/include/asm/mips-cm.h
Paul Burton cd21754660 MIPS: CM: use __raw_ memory access functions 
The CM registers use native endianness, so using plain readl & writel
will produce incorrect results on big endian systems.

Reported-by: Jeffrey Deans <jeffrey.deans@imgtec.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6656/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-31 18:17:13 +02:00

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/*
* Copyright (C) 2013 Imagination Technologies
* Author: Paul Burton <paul.burton@imgtec.com>
*
* 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 <linux/io.h>
#include <linux/types.h>
/* 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 __raw_readl(addr_gcr_##name()); \
}
#define BUILD_CM__W(name, off) \
static inline void write_gcr_##name(u32 value) \
{ \
__raw_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__ */
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