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ETRAX-FS: Simplify the DMA blocks address registration and decoding.

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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5898 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
edgar_igl 2008-12-07 00:14:21 +00:00
parent 0db74b0705
commit e63204853e
1 changed files with 7 additions and 18 deletions
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25
hw/etraxfs_dma.c
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@ -165,11 +165,9 @@ enum dma_ch_state
struct fs_dma_channel
{
int regmap;
qemu_irq *irq;
struct etraxfs_dma_client *client;
/* Internal status. */
int stream_cmd_src;
enum dma_ch_state state;
@ -187,6 +185,7 @@ struct fs_dma_channel
struct fs_dma_ctrl
{
int map;
CPUState *env;
int nr_channels;
@ -570,9 +569,9 @@ dma_readl (void *opaque, target_phys_addr_t addr)
int c;
uint32_t r = 0;
/* Make addr relative to this instances base. */
/* Make addr relative to this channel and bounded to nr regs. */
c = fs_channel(addr);
addr &= 0x1fff;
addr &= 0xff;
switch (addr)
{
case RW_STAT:
@ -616,9 +615,9 @@ dma_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
struct fs_dma_ctrl *ctrl = opaque;
int c;
/* Make addr relative to this instances base. */
/* Make addr relative to this channel and bounded to nr regs. */
c = fs_channel(addr);
addr &= 0x1fff;
addr &= 0xff;
switch (addr)
{
case RW_DATA:
@ -744,7 +743,6 @@ void *etraxfs_dmac_init(CPUState *env,
target_phys_addr_t base, int nr_channels)
{
struct fs_dma_ctrl *ctrl = NULL;
int i;
ctrl = qemu_mallocz(sizeof *ctrl);
if (!ctrl)
@ -758,17 +756,8 @@ void *etraxfs_dmac_init(CPUState *env,
if (!ctrl->channels)
goto err;
for (i = 0; i < nr_channels; i++)
{
ctrl->channels[i].regmap = cpu_register_io_memory(0,
dma_read,
dma_write,
ctrl);
cpu_register_physical_memory_offset (base + i * 0x2000,
sizeof ctrl->channels[i].regs, ctrl->channels[i].regmap,
i * 0x2000);
}
ctrl->map = cpu_register_io_memory(0, dma_read, dma_write, ctrl);
cpu_register_physical_memory(base, nr_channels * 0x2000, ctrl->map);
return ctrl;
err:
qemu_free(ctrl->channels);