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/*
* QEMU Common PCI Host bridge configuration data space access routines.
*
* Copyright (c) 2006 Fabrice Bellard
*
* 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.
*/
/* Worker routines for a PCI host controller that uses an {address,data}
register pair to access PCI configuration space. */
typedef struct {
uint32_t config_reg;
PCIBus *bus;
} PCIHostState;
static void pci_host_data_writeb(void* opaque, pci_addr_t addr, uint32_t val)
{
PCIHostState *s = opaque;
if (s->config_reg & (1u << 31))
pci_data_write(s->bus, s->config_reg | (addr & 3), val, 1);
}
static void pci_host_data_writew(void* opaque, pci_addr_t addr, uint32_t val)
{
PCIHostState *s = opaque;
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap16(val);
#endif
if (s->config_reg & (1u << 31))
pci_data_write(s->bus, s->config_reg | (addr & 3), val, 2);
}
static void pci_host_data_writel(void* opaque, pci_addr_t addr, uint32_t val)
{
PCIHostState *s = opaque;
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap32(val);
#endif
if (s->config_reg & (1u << 31))
pci_data_write(s->bus, s->config_reg, val, 4);
}
static uint32_t pci_host_data_readb(void* opaque, pci_addr_t addr)
{
PCIHostState *s = opaque;
if (!(s->config_reg & (1 << 31)))
return 0xff;
return pci_data_read(s->bus, s->config_reg | (addr & 3), 1);
}
static uint32_t pci_host_data_readw(void* opaque, pci_addr_t addr)
{
PCIHostState *s = opaque;
uint32_t val;
if (!(s->config_reg & (1 << 31)))
return 0xffff;
val = pci_data_read(s->bus, s->config_reg | (addr & 3), 2);
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap16(val);
#endif
return val;
}
static uint32_t pci_host_data_readl(void* opaque, pci_addr_t addr)
{
PCIHostState *s = opaque;
uint32_t val;
if (!(s->config_reg & (1 << 31)))
return 0xffffffff;
val = pci_data_read(s->bus, s->config_reg | (addr & 3), 4);
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap32(val);
#endif
return val;
}
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