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