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e0b79e669b
mappings for armv6 pmap zero and copy operations to the MD PCPU region. Change sysmap initialization to only allocate KVA pages for CPUs that are actually present. While here, collapse CMAP3 into CMAP2 (their use was mutually exclusive anyway) and "recover" some space in PCPU padding that has always been available due to 64-byte cacheline padding. Reviewed by: skra MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D9172
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/*-
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* Copyright (c) 1999 Luoqi Chen <luoqi@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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* from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PCPU_H_
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#define _MACHINE_PCPU_H_
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#ifdef _KERNEL
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#define ALT_STACK_SIZE 128
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struct vmspace;
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#endif /* _KERNEL */
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#if __ARM_ARCH >= 6
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#define PCPU_MD_FIELDS \
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unsigned int pc_vfpsid; \
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unsigned int pc_vfpmvfr0; \
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unsigned int pc_vfpmvfr1; \
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struct pmap *pc_curpmap; \
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struct mtx pc_cmap_lock; \
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void *pc_cmap1_pte2p; \
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void *pc_cmap2_pte2p; \
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caddr_t pc_cmap1_addr; \
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caddr_t pc_cmap2_addr; \
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vm_offset_t pc_qmap_addr; \
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void *pc_qmap_pte; \
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unsigned int pc_dbreg[32]; \
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int pc_dbreg_cmd; \
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char __pad[27]
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#else
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#define PCPU_MD_FIELDS \
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vm_offset_t qmap_addr; \
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void *pc_qmap_pte; \
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char __pad[149]
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#endif
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#ifdef _KERNEL
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#define PC_DBREG_CMD_NONE 0
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#define PC_DBREG_CMD_LOAD 1
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struct pcb;
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struct pcpu;
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extern struct pcpu *pcpup;
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#if __ARM_ARCH >= 6
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#define CPU_MASK (0xf)
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#ifndef SMP
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#define get_pcpu() (pcpup)
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#else
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#define get_pcpu() __extension__ ({ \
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int id; \
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__asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \
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(pcpup + (id & CPU_MASK)); \
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})
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#endif
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static inline struct thread *
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get_curthread(void)
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{
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void *ret;
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__asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
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return (ret);
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}
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static inline void
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set_curthread(struct thread *td)
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{
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__asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
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}
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static inline void *
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get_tls(void)
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{
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void *tls;
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/* TPIDRURW contains the authoritative value. */
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__asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls));
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return (tls);
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}
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static inline void
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set_tls(void *tls)
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{
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/*
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* Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written
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* first to ensure that a context switch between the two writes will
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* still give the desired result of updating both.
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*/
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__asm __volatile(
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"mcr p15, 0, %0, c13, c0, 2\n"
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"mcr p15, 0, %0, c13, c0, 3\n"
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: : "r" (tls));
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}
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#define curthread get_curthread()
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#else
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#define get_pcpu() pcpup
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#endif
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#define PCPU_GET(member) (get_pcpu()->pc_ ## member)
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#define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
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#define PCPU_INC(member) PCPU_ADD(member, 1)
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#define PCPU_PTR(member) (&get_pcpu()->pc_ ## member)
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#define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value))
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void pcpu0_init(void);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PCPU_H_ */
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