arch/m68k/mac/iop.c has:
static struct iop_msg iop_msg_pool[NUM_IOP_MSGS];
As iop_msg_pool consumes 4928 bytes, it should be allocated dynamically,
especially for multi-platform kernels not running on Mac.
Furthermore:
/*
* Initialize the IOPs, if present.
*/
void __init iop_init(void)
{
int i;
if (iop_scc_present) {
printk("IOP: detected SCC IOP at %p\n", iop_base[IOP_NUM_SCC]);
}
if (iop_ism_present) {
printk("IOP: detected ISM IOP at %p\n", iop_base[IOP_NUM_ISM]);
iop_start(iop_base[IOP_NUM_ISM]);
iop_alive(iop_base[IOP_NUM_ISM]); /* clears the alive flag */
}
/* Make the whole pool available and empty the queues */
for (i = 0 ; i < NUM_IOP_MSGS ; i++) {
iop_msg_pool[i].status = IOP_MSGSTATUS_UNUSED;
}
for (i = 0 ; i < NUM_IOP_CHAN ; i++) {
iop_send_queue[IOP_NUM_SCC][i] = NULL;
iop_send_queue[IOP_NUM_ISM][i] = NULL;
iop_listeners[IOP_NUM_SCC][i].devname = NULL;
iop_listeners[IOP_NUM_SCC][i].handler = NULL;
iop_listeners[IOP_NUM_ISM][i].devname = NULL;
iop_listeners[IOP_NUM_ISM][i].handler = NULL;
}
}
However, despite the comment at the top, all of the above is done
unconditionally?
Do all Macs use the IOP functionality?
P.S. Before anyone mentions zorro_autocon: yes, it's on my list ;-)
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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