162 lines
3.5 KiB
C
162 lines
3.5 KiB
C
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#define _SYSTEM 1
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#define VERBOSE 0
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/safecopies.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <string.h>
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#include <env.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <memory.h>
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#include "glo.h"
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#include "proto.h"
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#include "util.h"
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#include "region.h"
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/*===========================================================================*
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* do_mmap *
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*===========================================================================*/
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PUBLIC int do_mmap(message *m)
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{
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int r, n;
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struct vmproc *vmp;
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int mfflags = 0;
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struct vir_region *vr = NULL;
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if((r=vm_isokendpt(m->m_source, &n)) != OK) {
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vm_panic("do_mmap: message from strange source", m->m_source);
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}
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vmp = &vmproc[n];
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if(m->VMM_FLAGS & MAP_LOWER16M)
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printf("VM: warning for %d: MAP_LOWER16M not implemented\n",
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m->m_source);
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if(!(vmp->vm_flags & VMF_HASPT))
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return ENXIO;
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if(m->VMM_FD == -1 || (m->VMM_FLAGS & MAP_ANON)) {
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int s;
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vir_bytes v;
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size_t len = (vir_bytes) m->VMM_LEN;
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if(m->VMM_FD != -1) {
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return EINVAL;
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}
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if(m->VMM_FLAGS & MAP_CONTIG) mfflags |= MF_CONTIG;
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if(m->VMM_FLAGS & MAP_PREALLOC) mfflags |= MF_PREALLOC;
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if(len % VM_PAGE_SIZE)
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len += VM_PAGE_SIZE - (len % VM_PAGE_SIZE);
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if(!(vr = map_page_region(vmp, vmp->vm_stacktop,
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VM_DATATOP, len, 0,
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VR_ANON | VR_WRITABLE, mfflags))) {
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return ENOMEM;
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}
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} else {
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return ENOSYS;
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}
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/* Return mapping, as seen from process. */
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vm_assert(vr);
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m->VMM_RETADDR = arch_map2vir(vmp, vr->vaddr);
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return OK;
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}
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/*===========================================================================*
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* do_map_phys *
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*===========================================================================*/
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PUBLIC int do_map_phys(message *m)
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{
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int r, n;
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struct vmproc *vmp;
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endpoint_t target;
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struct vir_region *vr;
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target = m->VMMP_EP;
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if(target == SELF)
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target = m->m_source;
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if((r=vm_isokendpt(target, &n)) != OK) {
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printf("do_map_phys: bogus target %d\n", target);
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return EINVAL;
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}
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vmp = &vmproc[n];
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if(!(vmp->vm_flags & VMF_HASPT))
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return ENXIO;
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if(!(vr = map_page_region(vmp, vmp->vm_stacktop, VM_DATATOP,
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(vir_bytes) m->VMMP_LEN, (vir_bytes)m->VMMP_PHADDR,
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VR_DIRECT | VR_NOPF | VR_WRITABLE, 0))) {
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printf("VM:do_map_phys: map_page_region failed\n");
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return ENOMEM;
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}
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m->VMMP_VADDR_REPLY = (void *) arch_map2vir(vmp, vr->vaddr);
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return OK;
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}
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/*===========================================================================*
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* do_unmap_phys *
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*===========================================================================*/
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PUBLIC int do_unmap_phys(message *m)
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{
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int r, n;
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struct vmproc *vmp;
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endpoint_t target;
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struct vir_region *region;
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target = m->VMUP_EP;
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if(target == SELF)
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target = m->m_source;
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if((r=vm_isokendpt(target, &n)) != OK) {
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printf("VM:do_unmap_phys: bogus target %d\n", target);
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return EINVAL;
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}
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vmp = &vmproc[n];
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if(!(region = map_lookup(vmp, (vir_bytes) m->VMUM_ADDR))) {
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printf("VM:do_unmap_phys: map_lookup failed\n");
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return EINVAL;
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}
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if(!(region->flags & VR_DIRECT)) {
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printf("VM:do_unmap_phys: region not a DIRECT mapping\n");
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return EINVAL;
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}
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if(map_unmap_region(vmp, region) != OK) {
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printf("VM:do_unmap_phys: map_unmap_region failed\n");
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return EINVAL;
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}
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return OK;
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}
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