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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: mem.c
/*- * Copyright (c) 2014 Andrew Turner * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/conf.h> #include <sys/malloc.h> #include <sys/memrange.h> #include <sys/uio.h> #include <machine/memdev.h> #include <machine/vmparam.h> #include <vm/vm.h> #include <vm/pmap.h> #include <vm/vm_extern.h> #include <vm/vm_page.h> struct mem_range_softc mem_range_softc; int memrw(struct cdev *dev, struct uio *uio, int flags) { ssize_t orig_resid; vm_offset_t off, v; struct iovec *iov; struct vm_page m; vm_page_t marr; u_int cnt; int error; error = 0; orig_resid = uio->uio_resid; while (uio->uio_resid > 0 && error == 0) { iov = uio->uio_iov; if (iov->iov_len == 0) { uio->uio_iov++; uio->uio_iovcnt--; if (uio->uio_iovcnt < 0) panic("memrw"); continue; } v = uio->uio_offset; off = v & PAGE_MASK; cnt = ulmin(iov->iov_len, PAGE_SIZE - (u_int)off); if (cnt == 0) continue; switch(dev2unit(dev)) { case CDEV_MINOR_KMEM: /* If the address is in the DMAP just copy it */ if (VIRT_IN_DMAP(v)) { error = uiomove((void *)v, cnt, uio); break; } if (!kernacc((void *)v, cnt, uio->uio_rw == UIO_READ ? VM_PROT_READ : VM_PROT_WRITE)) { error = EFAULT; break; } /* Get the physical address to read */ v = pmap_extract(kernel_pmap, v); if (v == 0) { error = EFAULT; break; } /* FALLTHROUGH */ case CDEV_MINOR_MEM: /* If within the DMAP use this to copy from */ if (PHYS_IN_DMAP(v)) { v = PHYS_TO_DMAP(v); error = uiomove((void *)v, cnt, uio); break; } /* Have uiomove_fromphys handle the data */ m.phys_addr = trunc_page(v); marr = &m; uiomove_fromphys(&marr, off, cnt, uio); break; } } /* * Don't return error if any byte was written. Read and write * can return error only if no i/o was performed. */ if (uio->uio_resid != orig_resid) error = 0; return (error); } /* * Allow user processes to MMAP some memory sections * instead of going through read/write. */ int memmmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int prot __unused, vm_memattr_t *memattr __unused) { if (dev2unit(dev) == CDEV_MINOR_MEM) { *paddr = offset; return (0); } return (-1); } int memioctl_md(struct cdev *dev __unused, u_long cmd __unused, caddr_t data __unused, int flags __unused, struct thread *td __unused) { return (ENOTTY); }
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