187 lines
4.7 KiB
C
187 lines
4.7 KiB
C
/*-
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* Copyright 2016 Svatopluk Kraus <skra@FreeBSD.org>
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* Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef MACHINE_CPU_V4_H
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#define MACHINE_CPU_V4_H
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/* There are no user serviceable parts here, they may change without notice */
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#ifndef _KERNEL
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#error Only include this file in the kernel
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#endif
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#include <machine/atomic.h>
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#include <machine/cpufunc.h>
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#include <machine/cpuinfo.h>
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#include <machine/sysreg.h>
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#if __ARM_ARCH >= 6
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#error Never include this file for ARMv6
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#else
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#define CPU_ASID_KERNEL 0
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/*
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* Macros to generate CP15 (system control processor) read/write functions.
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*/
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#define _FX(s...) #s
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#define _RF0(fname, aname...) \
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static __inline uint32_t \
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fname(void) \
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{ \
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uint32_t reg; \
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__asm __volatile("mrc\t" _FX(aname): "=r" (reg)); \
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return(reg); \
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}
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#define _R64F0(fname, aname) \
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static __inline uint64_t \
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fname(void) \
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{ \
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uint64_t reg; \
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__asm __volatile("mrrc\t" _FX(aname): "=r" (reg)); \
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return(reg); \
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}
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#define _WF0(fname, aname...) \
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static __inline void \
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fname(void) \
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{ \
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__asm __volatile("mcr\t" _FX(aname)); \
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}
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#define _WF1(fname, aname...) \
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static __inline void \
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fname(uint32_t reg) \
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{ \
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__asm __volatile("mcr\t" _FX(aname):: "r" (reg)); \
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}
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/*
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* Publicly accessible functions
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*/
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/* Various control registers */
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_RF0(cp15_cpacr_get, CP15_CPACR(%0))
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_WF1(cp15_cpacr_set, CP15_CPACR(%0))
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_RF0(cp15_dfsr_get, CP15_DFSR(%0))
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_RF0(cp15_ttbr_get, CP15_TTBR0(%0))
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_RF0(cp15_dfar_get, CP15_DFAR(%0))
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/* XScale */
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_RF0(cp15_actlr_get, CP15_ACTLR(%0))
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_WF1(cp15_actlr_set, CP15_ACTLR(%0))
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/*CPU id registers */
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_RF0(cp15_midr_get, CP15_MIDR(%0))
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_RF0(cp15_ctr_get, CP15_CTR(%0))
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_RF0(cp15_tcmtr_get, CP15_TCMTR(%0))
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_RF0(cp15_tlbtr_get, CP15_TLBTR(%0))
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_RF0(cp15_sctlr_get, CP15_SCTLR(%0))
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#undef _FX
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#undef _RF0
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#undef _WF0
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#undef _WF1
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/*
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* armv4/5 compatibility shims.
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*
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* These functions provide armv4 cache maintenance using the new armv6 names.
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* Included here are just the functions actually used now in common code; it may
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* be necessary to add things here over time.
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*
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* The callers of the dcache functions expect these routines to handle address
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* and size values which are not aligned to cacheline boundaries; the armv4 and
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* armv5 asm code handles that.
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*/
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static __inline void
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tlb_flush_all(void)
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{
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cpu_tlb_flushID();
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cpu_cpwait();
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}
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static __inline void
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icache_sync(vm_offset_t va, vm_size_t size)
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{
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cpu_icache_sync_range(va, size);
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}
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static __inline void
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dcache_inv_poc(vm_offset_t va, vm_paddr_t pa, vm_size_t size)
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{
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cpu_dcache_inv_range(va, size);
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#ifdef ARM_L2_PIPT
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cpu_l2cache_inv_range(pa, size);
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#else
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cpu_l2cache_inv_range(va, size);
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#endif
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}
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static __inline void
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dcache_inv_poc_dma(vm_offset_t va, vm_paddr_t pa, vm_size_t size)
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{
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/* See armv6 code, above, for why we do L2 before L1 in this case. */
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#ifdef ARM_L2_PIPT
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cpu_l2cache_inv_range(pa, size);
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#else
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cpu_l2cache_inv_range(va, size);
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#endif
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cpu_dcache_inv_range(va, size);
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}
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static __inline void
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dcache_wb_poc(vm_offset_t va, vm_paddr_t pa, vm_size_t size)
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{
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cpu_dcache_wb_range(va, size);
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#ifdef ARM_L2_PIPT
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cpu_l2cache_wb_range(pa, size);
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#else
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cpu_l2cache_wb_range(va, size);
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#endif
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}
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static __inline void
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dcache_wbinv_poc_all(void)
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{
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cpu_idcache_wbinv_all();
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cpu_l2cache_wbinv_all();
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}
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#endif /* _KERNEL */
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#endif /* MACHINE_CPU_V4_H */
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