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📄 autoconf.c(3.38 KB)
📄 bcopy.S(6.4 KB)
📄 bus_space_generic.c(17.44 KB)
📄 busdma_machdep.c(40.9 KB)
📄 cache.c(11.76 KB)
📄 cache_mipsNN.c(28.85 KB)
📄 cpu.c(15.33 KB)
📄 db_disasm.c(10.94 KB)
📄 db_interface.c(8.46 KB)
📄 db_trace.c(11.38 KB)
📄 dump_machdep.c(1.89 KB)
📄 elf_machdep.c(12.77 KB)
📄 elf_trampoline.c(5.67 KB)
📄 exception.S(33.09 KB)
📄 fp.S(78.42 KB)
📄 freebsd32_machdep.c(12.66 KB)
📄 gdb_machdep.c(6.65 KB)
📄 genassym.c(8.92 KB)
📄 in_cksum.c(6.37 KB)
📄 inckern.S(1.62 KB)
📄 intr_machdep.c(7.67 KB)
📄 libkern_machdep.c(1.67 KB)
📄 locore.S(5.93 KB)
📄 machdep.c(14.16 KB)
📄 mem.c(4.57 KB)
📄 minidump_machdep.c(8.27 KB)
📄 mips_pic.c(17.28 KB)
📄 mp_machdep.c(7.73 KB)
📄 mpboot.S(2.71 KB)
📄 nexus.c(16.24 KB)
📄 octeon_cop2.c(2.12 KB)
📄 octeon_cop2_swtch.S(7.38 KB)
📄 ofw_machdep.c(2.28 KB)
📄 pm_machdep.c(13.79 KB)
📄 pmap.c(90.48 KB)
📄 ptrace_machdep.c(1.6 KB)
📄 sc_machdep.c(2.21 KB)
📄 stack_machdep.c(4.37 KB)
📄 stdatomic.c(11.64 KB)
📄 support.S(20.36 KB)
📄 swtch.S(19.44 KB)
📄 sys_machdep.c(2.75 KB)
📄 tick.c(9.8 KB)
📄 tlb.c(8.78 KB)
📄 trap.c(43.68 KB)
📄 uio_machdep.c(4.49 KB)
📄 uma_machdep.c(2.72 KB)
📄 vm_machdep.c(16.44 KB)

Editing: uio_machdep.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sf_buf.h>
#include <sys/uio.h>

#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/vm_param.h>

#include <machine/cache.h>

/*
 * Implement uiomove(9) from physical memory using a combination
 * of the direct mapping and sf_bufs to reduce the creation and
 * destruction of ephemeral mappings.  
 */
int
uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
{
	struct sf_buf *sf;
	struct thread *td = curthread;
	struct iovec *iov;
	void *cp;
	vm_offset_t page_offset;
	vm_paddr_t pa;
	vm_page_t m;
	size_t cnt;
	int error = 0;
	int save = 0;

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;
	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 = ulmin(cnt, PAGE_SIZE - page_offset);
		m = ma[offset >> PAGE_SHIFT];
		pa = VM_PAGE_TO_PHYS(m);
		if (MIPS_DIRECT_MAPPABLE(pa)) {
			sf = NULL;
			cp = (char *)MIPS_PHYS_TO_DIRECT(pa) + page_offset;
			/*
			 * flush all mappings to this page, KSEG0 address first
			 * in order to get it overwritten by correct data
			 */
			mips_dcache_wbinv_range((vm_offset_t)cp, cnt);
			pmap_flush_pvcache(m);
		} else {
			sf = sf_buf_alloc(m, 0);
			cp = (char *)sf_buf_kva(sf) + 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) {
				if (sf != NULL)
					sf_buf_free(sf);
				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 (sf != NULL)
			sf_buf_free(sf);
		else
			mips_dcache_wbinv_range((vm_offset_t)cp, cnt);
		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 (save == 0)
		td->td_pflags &= ~TDP_DEADLKTREAT;
	return (error);
}

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Editing: uio_machdep.c

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