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/* Copyright (C) 1998, Cygnus Solutions
*/
#include "sim-main.h"
#include "device.h"
#include "dma.h"
int
dma_io_read_buffer(device *me,
void *dest,
int space,
address_word addr,
unsigned nr_bytes,
sim_cpu *processor,
sim_cia cia)
{
printf("%s: Read!\n", me->name);
return nr_bytes;
}
static sim_event_handler do_the_dma_thing_handler;
int
dma_io_write_buffer(device *me,
const void *source,
int space,
address_word addr,
unsigned nr_bytes,
sim_cpu *processor,
sim_cia cia)
{
printf("%s: Write!\n", me->name);
/* Do an event before the next instruction! */
sim_events_schedule (CPU_STATE(processor),
0 /*time*/,
do_the_dma_thing_handler,
CPU_STATE(processor) /*data*/);
return nr_bytes;
}
device dma_device =
{
"Dma Controller",
&dma_io_read_buffer,
&dma_io_write_buffer
};
void
dma_attach(SIM_DESC sd)
{
sim_core_attach (sd,
NULL,
0 /*level*/,
access_read_write,
0 /*space ???*/,
DMA_REGISTER_WINDOW_START,
DMA_REGISTER_WINDOW_SIZE /*nr_bytes*/,
0 /*modulo*/,
&dma_device,
NULL /*buffer*/);
}
static void
do_the_dma_thing_handler(SIM_DESC sd, void *data)
{
printf("Dma Event!!!\n");
}
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