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cirrus: simplify bitblt BAR access functions 

Make use of the memory API's ability to satisfy multi-byte accesses via
multiple single-byte accesses.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Avi Kivity 2011-08-08 16:08:59 +03:00 committed by Anthony Liguori
parent 1e04d4d66a
commit 4e56f089ef
1 changed files with 13 additions and 68 deletions
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81
hw/cirrus_vga.c
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@ -2446,37 +2446,23 @@ static void cirrus_linear_write(void *opaque, target_phys_addr_t addr,
***************************************/ ***************************************/
static uint32_t cirrus_linear_bitblt_readb(void *opaque, target_phys_addr_t addr) static uint64_t cirrus_linear_bitblt_read(void *opaque,
target_phys_addr_t addr,
unsigned size)
{ {
CirrusVGAState *s = opaque;
uint32_t ret; uint32_t ret;
/* XXX handle bitblt */ /* XXX handle bitblt */
(void)s;
ret = 0xff; ret = 0xff;
return ret; return ret;
} }
static uint32_t cirrus_linear_bitblt_readw(void *opaque, target_phys_addr_t addr) static void cirrus_linear_bitblt_write(void *opaque,
{ target_phys_addr_t addr,
uint32_t v; uint64_t val,
unsigned size)
v = cirrus_linear_bitblt_readb(opaque, addr);
v |= cirrus_linear_bitblt_readb(opaque, addr + 1) << 8;
return v;
}
static uint32_t cirrus_linear_bitblt_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
v = cirrus_linear_bitblt_readb(opaque, addr);
v |= cirrus_linear_bitblt_readb(opaque, addr + 1) << 8;
v |= cirrus_linear_bitblt_readb(opaque, addr + 2) << 16;
v |= cirrus_linear_bitblt_readb(opaque, addr + 3) << 24;
return v;
}
static void cirrus_linear_bitblt_writeb(void *opaque, target_phys_addr_t addr,
uint32_t val)
{ {
CirrusVGAState *s = opaque; CirrusVGAState *s = opaque;
@ -2489,55 +2475,14 @@ static void cirrus_linear_bitblt_writeb(void *opaque, target_phys_addr_t addr,
} }
} }
static void cirrus_linear_bitblt_writew(void *opaque, target_phys_addr_t addr,
uint32_t val)
{
cirrus_linear_bitblt_writeb(opaque, addr, val & 0xff);
cirrus_linear_bitblt_writeb(opaque, addr + 1, (val >> 8) & 0xff);
}
static void cirrus_linear_bitblt_writel(void *opaque, target_phys_addr_t addr,
uint32_t val)
{
cirrus_linear_bitblt_writeb(opaque, addr, val & 0xff);
cirrus_linear_bitblt_writeb(opaque, addr + 1, (val >> 8) & 0xff);
cirrus_linear_bitblt_writeb(opaque, addr + 2, (val >> 16) & 0xff);
cirrus_linear_bitblt_writeb(opaque, addr + 3, (val >> 24) & 0xff);
}
static uint64_t cirrus_linear_bitblt_read(void *opaque,
target_phys_addr_t addr,
unsigned size)
{
CirrusVGAState *s = opaque;
switch (size) {
case 1: return cirrus_linear_bitblt_readb(s, addr);
case 2: return cirrus_linear_bitblt_readw(s, addr);
case 4: return cirrus_linear_bitblt_readl(s, addr);
default: abort();
}
};
static void cirrus_linear_bitblt_write(void *opaque,
target_phys_addr_t addr,
uint64_t data,
unsigned size)
{
CirrusVGAState *s = opaque;
switch (size) {
case 1: return cirrus_linear_bitblt_writeb(s, addr, data);
case 2: return cirrus_linear_bitblt_writew(s, addr, data);
case 4: return cirrus_linear_bitblt_writel(s, addr, data);
default: abort();
}
};
static const MemoryRegionOps cirrus_linear_bitblt_io_ops = { static const MemoryRegionOps cirrus_linear_bitblt_io_ops = {
.read = cirrus_linear_bitblt_read, .read = cirrus_linear_bitblt_read,
.write = cirrus_linear_bitblt_write, .write = cirrus_linear_bitblt_write,
.endianness = DEVICE_LITTLE_ENDIAN, .endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
}; };
static void unmap_bank(CirrusVGAState *s, unsigned bank) static void unmap_bank(CirrusVGAState *s, unsigned bank)