minix/servers/vm/rs.c

#define _SYSTEM 1

#include <minix/callnr.h>
#include <minix/com.h>
#include <minix/config.h>
#include <minix/const.h>
#include <minix/ds.h>
#include <minix/endpoint.h>
#include <minix/keymap.h>
#include <minix/minlib.h>
#include <minix/type.h>
#include <minix/ipc.h>
#include <minix/sysutil.h>
#include <minix/syslib.h>
#include <minix/safecopies.h>
#include <minix/bitmap.h>

#include <errno.h>
#include <string.h>
#include <env.h>
#include <stdio.h>
#include <assert.h>

#include "glo.h"
#include "proto.h"
#include "util.h"
#include "region.h"

/*===========================================================================*
 *				do_rs_set_priv				     *
 *===========================================================================*/
PUBLIC int do_rs_set_priv(message *m)
{
	int r, n, nr;
	struct vmproc *vmp;

	nr = m->VM_RS_NR;

	if ((r = vm_isokendpt(nr, &n)) != OK) {
		printf("do_rs_set_priv: bad endpoint %d\n", nr);
		return EINVAL;
	}

	vmp = &vmproc[n];

	if (m->VM_RS_BUF) {
		r = sys_datacopy(m->m_source, (vir_bytes) m->VM_RS_BUF,
				 SELF, (vir_bytes) vmp->vm_call_mask,
				 sizeof(vmp->vm_call_mask));
		if (r != OK)
			return r;
	}

	return OK;
}

/*===========================================================================*
 *				do_rs_update	     			     *
 *===========================================================================*/
PUBLIC int do_rs_update(message *m_ptr)
{
	endpoint_t src_e, dst_e, reply_e;
	int r;

	src_e = m_ptr->VM_RS_SRC_ENDPT;
	dst_e = m_ptr->VM_RS_DST_ENDPT;

	/* Let the kernel do the update first. */
	r = sys_update(src_e, dst_e);
	if(r != OK) {
		return r;
	}

	/* Do the update in VM now. */
	r = swap_proc(src_e, dst_e);
	if(r != OK) {
		return r;
	}

	/* Reply, update-aware. */
	reply_e = m_ptr->m_source;
	if(reply_e == src_e) reply_e = dst_e;
	if(reply_e == dst_e) reply_e = src_e;
	m_ptr->m_type = OK;
	r = send(reply_e, m_ptr);
	if(r != OK) {
		panic("send() error");
	}

	return SUSPEND;
}

/*===========================================================================*
 *				do_rs_memctl	     			     *
 *===========================================================================*/
PUBLIC int do_rs_memctl(message *m_ptr)
{
	endpoint_t ep;
	int req, r, proc_nr;
	struct vmproc *vmp;

	ep = m_ptr->VM_RS_CTL_ENDPT;
	req = m_ptr->VM_RS_CTL_REQ;

	/* Lookup endpoint. */
	if ((r = vm_isokendpt(ep, &proc_nr)) != OK) {
		printf("do_rs_memctl: bad endpoint %d\n", ep);
		return EINVAL;
	}
	vmp = &vmproc[proc_nr];

	/* Process request. */
	switch(req)
	{
	case VM_RS_MEM_PIN:
		r = map_pin_memory(vmp);
		return r;

	default:
		printf("do_rs_memctl: bad request %d\n", req);
		return EINVAL;
	}
}