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autoconf.c
(3.04 KB)
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bus_machdep.c
(6.32 KB)
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bus_space_asm.S
(2.42 KB)
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busdma_bounce.c
(36.49 KB)
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busdma_machdep.c
(7.48 KB)
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clock.c
(2.32 KB)
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copyinout.S
(5.04 KB)
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cpufunc_asm.S
(1.87 KB)
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db_disasm.c
(22.59 KB)
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db_interface.c
(4.42 KB)
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db_trace.c
(4.15 KB)
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dump_machdep.c
(2.21 KB)
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elf_machdep.c
(13.43 KB)
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exception.S
(5.61 KB)
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genassym.c
(4.57 KB)
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identcpu.c
(6.19 KB)
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in_cksum.c
(6.28 KB)
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intr_machdep.c
(6.11 KB)
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locore.S
(8.6 KB)
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machdep.c
(23.28 KB)
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mem.c
(3.69 KB)
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minidump_machdep.c
(9.58 KB)
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mp_machdep.c
(12.17 KB)
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nexus.c
(10.73 KB)
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ofw_machdep.c
(1.9 KB)
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plic.c
(11.93 KB)
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pmap.c
(119.71 KB)
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riscv_console.c
(5.52 KB)
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riscv_syscon.c
(2.83 KB)
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sbi.c
(8.96 KB)
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soc.c
(3.08 KB)
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stack_machdep.c
(2.93 KB)
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support.S
(7.73 KB)
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swtch.S
(10.98 KB)
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sys_machdep.c
(1.98 KB)
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timer.c
(7.02 KB)
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trap.c
(9.66 KB)
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uio_machdep.c
(4.2 KB)
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uma_machdep.c
(2.28 KB)
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unwind.c
(2.19 KB)
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vm_machdep.c
(6.87 KB)
Editing: uio_machdep.c
/*- * Copyright (c) 2004 Alan L. Cox <alc@cs.rice.edu> * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)kern_subr.c 8.3 (Berkeley) 1/21/94 */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/proc.h> #include <sys/systm.h> #include <sys/uio.h> #include <vm/vm.h> #include <vm/vm_page.h> #include <machine/vmparam.h> /* * Implement uiomove(9) from physical memory using the direct map to * avoid the creation and destruction of ephemeral mappings. */ int uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio) { struct thread *td = curthread; struct iovec *iov; void *cp; vm_offset_t page_offset, vaddr; size_t cnt; int error = 0; int save = 0; boolean_t mapped; KASSERT(uio->uio_rw == UIO_READ || uio->uio_rw == UIO_WRITE, ("uiomove_fromphys: mode")); KASSERT(uio->uio_segflg != UIO_USERSPACE || uio->uio_td == curthread, ("uiomove_fromphys proc")); save = td->td_pflags & TDP_DEADLKTREAT; td->td_pflags |= TDP_DEADLKTREAT; mapped = FALSE; while (n > 0 && uio->uio_resid) { iov = uio->uio_iov; cnt = iov->iov_len; if (cnt == 0) { uio->uio_iov++; uio->uio_iovcnt--; continue; } if (cnt > n) cnt = n; page_offset = offset & PAGE_MASK; cnt = min(cnt, PAGE_SIZE - page_offset); if (uio->uio_segflg != UIO_NOCOPY) { mapped = pmap_map_io_transient( &ma[offset >> PAGE_SHIFT], &vaddr, 1, TRUE); cp = (char *)vaddr + page_offset; } switch (uio->uio_segflg) { case UIO_USERSPACE: maybe_yield(); if (uio->uio_rw == UIO_READ) error = copyout(cp, iov->iov_base, cnt); else error = copyin(iov->iov_base, cp, cnt); if (error) goto out; break; case UIO_SYSSPACE: if (uio->uio_rw == UIO_READ) bcopy(cp, iov->iov_base, cnt); else bcopy(iov->iov_base, cp, cnt); break; case UIO_NOCOPY: break; } if (__predict_false(mapped)) { pmap_unmap_io_transient(&ma[offset >> PAGE_SHIFT], &vaddr, 1, TRUE); mapped = FALSE; } iov->iov_base = (char *)iov->iov_base + cnt; iov->iov_len -= cnt; uio->uio_resid -= cnt; uio->uio_offset += cnt; offset += cnt; n -= cnt; } out: if (__predict_false(mapped)) { panic("TODO 3"); pmap_unmap_io_transient(&ma[offset >> PAGE_SHIFT], &vaddr, 1, TRUE); } if (save == 0) td->td_pflags &= ~TDP_DEADLKTREAT; return (error); }
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