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cirrus: simplify vga window mmio access functions

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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 16:09:00 +03:00 committed by Anthony Liguori
parent 4e56f089ef
commit a815b16649
1 changed files with 11 additions and 68 deletions
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79
hw/cirrus_vga.c
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@ -1956,7 +1956,9 @@ static void cirrus_mem_writeb_mode4and5_16bpp(CirrusVGAState * s,
* *
***************************************/ ***************************************/
static uint32_t cirrus_vga_mem_readb(void *opaque, target_phys_addr_t addr) static uint64_t cirrus_vga_mem_read(void *opaque,
target_phys_addr_t addr,
uint32_t size)
{ {
CirrusVGAState *s = opaque; CirrusVGAState *s = opaque;
unsigned bank_index; unsigned bank_index;
@ -1967,8 +1969,6 @@ static uint32_t cirrus_vga_mem_readb(void *opaque, target_phys_addr_t addr)
return vga_mem_readb(s, addr); return vga_mem_readb(s, addr);
} }
addr &= 0x1ffff;
if (addr < 0x10000) { if (addr < 0x10000) {
/* XXX handle bitblt */ /* XXX handle bitblt */
/* video memory */ /* video memory */
@ -2000,28 +2000,10 @@ static uint32_t cirrus_vga_mem_readb(void *opaque, target_phys_addr_t addr)
return val; return val;
} }
static uint32_t cirrus_vga_mem_readw(void *opaque, target_phys_addr_t addr) static void cirrus_vga_mem_write(void *opaque,
{ target_phys_addr_t addr,
uint32_t v; uint64_t mem_value,
uint32_t size)
v = cirrus_vga_mem_readb(opaque, addr);
v |= cirrus_vga_mem_readb(opaque, addr + 1) << 8;
return v;
}
static uint32_t cirrus_vga_mem_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
v = cirrus_vga_mem_readb(opaque, addr);
v |= cirrus_vga_mem_readb(opaque, addr + 1) << 8;
v |= cirrus_vga_mem_readb(opaque, addr + 2) << 16;
v |= cirrus_vga_mem_readb(opaque, addr + 3) << 24;
return v;
}
static void cirrus_vga_mem_writeb(void *opaque, target_phys_addr_t addr,
uint32_t mem_value)
{ {
CirrusVGAState *s = opaque; CirrusVGAState *s = opaque;
unsigned bank_index; unsigned bank_index;
@ -2033,8 +2015,6 @@ static void cirrus_vga_mem_writeb(void *opaque, target_phys_addr_t addr,
return; return;
} }
addr &= 0x1ffff;
if (addr < 0x10000) { if (addr < 0x10000) {
if (s->cirrus_srcptr != s->cirrus_srcptr_end) { if (s->cirrus_srcptr != s->cirrus_srcptr_end) {
/* bitblt */ /* bitblt */
@ -2084,51 +2064,14 @@ static void cirrus_vga_mem_writeb(void *opaque, target_phys_addr_t addr,
} }
} }
static void cirrus_vga_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
cirrus_vga_mem_writeb(opaque, addr, val & 0xff);
cirrus_vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
}
static void cirrus_vga_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
cirrus_vga_mem_writeb(opaque, addr, val & 0xff);
cirrus_vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
cirrus_vga_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
cirrus_vga_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
}
static uint64_t cirrus_vga_mem_read(void *opaque,
target_phys_addr_t addr,
uint32_t size)
{
CirrusVGAState *s = opaque;
switch (size) {
case 1: return cirrus_vga_mem_readb(s, addr);
case 2: return cirrus_vga_mem_readw(s, addr);
case 4: return cirrus_vga_mem_readl(s, addr);
default: abort();
}
}
static void cirrus_vga_mem_write(void *opaque, target_phys_addr_t addr,
uint64_t data, unsigned size)
{
CirrusVGAState *s = opaque;
switch (size) {
case 1: return cirrus_vga_mem_writeb(s, addr, data);
case 2: return cirrus_vga_mem_writew(s, addr, data);
case 4: return cirrus_vga_mem_writel(s, addr, data);
default: abort();
}
};
static const MemoryRegionOps cirrus_vga_mem_ops = { static const MemoryRegionOps cirrus_vga_mem_ops = {
.read = cirrus_vga_mem_read, .read = cirrus_vga_mem_read,
.write = cirrus_vga_mem_write, .write = cirrus_vga_mem_write,
.endianness = DEVICE_LITTLE_ENDIAN, .endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
}; };
/*************************************** /***************************************