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/*
* PowerMac descriptor-based DMA emulation
*
* Copyright (c) 2005-2007 Fabrice Bellard
* Copyright (c) 2007 Jocelyn Mayer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "ppc_mac.h"
/* debug DBDMA */
//#define DEBUG_DBDMA
#ifdef DEBUG_DBDMA
#define DBDMA_DPRINTF(fmt, args...) \
do { printf("DBDMA: " fmt , ##args); } while (0)
#else
#define DBDMA_DPRINTF(fmt, args...)
#endif
/* DBDMA: currently no op - should suffice right now */
static void dbdma_writeb (void *opaque,
target_phys_addr_t addr, uint32_t value)
{
DBDMA_DPRINTF("writeb 0x" TARGET_FMT_plx " <= 0x%08x\n", addr, value);
}
static void dbdma_writew (void *opaque,
target_phys_addr_t addr, uint32_t value)
{
DBDMA_DPRINTF("writew 0x" TARGET_FMT_plx " <= 0x%08x\n", addr, value);
}
static void dbdma_writel (void *opaque,
target_phys_addr_t addr, uint32_t value)
{
DBDMA_DPRINTF("writel 0x" TARGET_FMT_plx " <= 0x%08x\n", addr, value);
}
static uint32_t dbdma_readb (void *opaque, target_phys_addr_t addr)
{
DBDMA_DPRINTF("readb 0x" TARGET_FMT_plx " => 0\n", addr);
return 0;
}
static uint32_t dbdma_readw (void *opaque, target_phys_addr_t addr)
{
DBDMA_DPRINTF("readw 0x" TARGET_FMT_plx " => 0\n", addr);
return 0;
}
static uint32_t dbdma_readl (void *opaque, target_phys_addr_t addr)
{
DBDMA_DPRINTF("readl 0x" TARGET_FMT_plx " => 0\n", addr);
return 0;
}
static CPUWriteMemoryFunc *dbdma_write[] = {
&dbdma_writeb,
&dbdma_writew,
&dbdma_writel,
};
static CPUReadMemoryFunc *dbdma_read[] = {
&dbdma_readb,
&dbdma_readw,
&dbdma_readl,
};
static void dbdma_reset(void *opaque)
{
}
void dbdma_init (int *dbdma_mem_index)
{
*dbdma_mem_index = cpu_register_io_memory(0, dbdma_read, dbdma_write, NULL);
qemu_register_reset(dbdma_reset, NULL);
dbdma_reset(NULL);
}
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