/*
* Return an integer value from an environment variable.
*/
int
getenv_int(const char *name, int *data)
{
quad_t tmp;
int rval;
rval = getenv_quad(name, &tmp);
if (rval)
*data = (int) tmp;
return (rval);
}
/*
* Return an unsigned long value from an environment variable.
*/
int
getenv_ulong(const char *name, unsigned long *data)
{
quad_t tmp;
int rval;
rval = getenv_quad(name, &tmp);
if (rval)
*data = (unsigned long) tmp;
return (rval);
}
static int
dcons_drv_init(int stage)
{
#if defined(__i386__) || defined(__amd64__)
quad_t addr, size;
#endif
if (drv_init)
return(drv_init);
drv_init = -1;
bzero(&dg, sizeof(dg));
dcons_conf = &dg;
dg.cdev = &dcons_consdev;
dg.buf = NULL;
dg.size = DCONS_BUF_SIZE;
#if defined(__i386__) || defined(__amd64__)
if (getenv_quad("dcons.addr", &addr) > 0 &&
getenv_quad("dcons.size", &size) > 0) {
#ifdef __i386__
vm_paddr_t pa;
/*
* Allow read/write access to dcons buffer.
*/
for (pa = trunc_page(addr); pa < addr + size; pa += PAGE_SIZE)
*vtopte(KERNBASE + pa) |= PG_RW;
invltlb();
#endif
/* XXX P to V */
dg.buf = (struct dcons_buf *)(vm_offset_t)(KERNBASE + addr);
dg.size = size;
if (dcons_load_buffer(dg.buf, dg.size, sc) < 0)
dg.buf = NULL;
}
#endif
if (dg.buf != NULL)
goto ok;
#ifndef KLD_MODULE
if (stage == 0) { /* XXX or cold */
/*
* DCONS_FORCE_CONSOLE == 1 and statically linked.
* called from cninit(). can't use contigmalloc yet .
*/
dg.buf = (struct dcons_buf *) bssbuf;
dcons_init(dg.buf, dg.size, sc);
} else
#endif
{
/*
* DCONS_FORCE_CONSOLE == 0 or kernel module case.
* if the module is loaded after boot,
* bssbuf could be non-continuous.
*/
dg.buf = (struct dcons_buf *) contigmalloc(dg.size,
M_DEVBUF, 0, 0x10000, 0xffffffff, PAGE_SIZE, 0ul);
if (dg.buf == NULL)
return (-1);
dcons_init(dg.buf, dg.size, sc);
}
ok:
dcons_buf = dg.buf;
drv_init = 1;
return 0;
}
