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/******************************************************************************
* pci.c
*
* Architecture-dependent PCI access functions.
*/
#include <xen/spinlock.h>
#include <xen/pci.h>
#include <asm/io.h>
#define PCI_CONF_ADDRESS(bus, dev, func, reg) \
(0x80000000 | (bus << 16) | (dev << 11) | (func << 8) | (reg & ~3))
uint8_t pci_conf_read8(
unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
unsigned int reg)
{
u32 value;
if ( seg || reg > 255 )
{
pci_mmcfg_read(seg, bus, PCI_DEVFN(dev, func), reg, 1, &value);
return value;
}
else
{
BUG_ON((bus > 255) || (dev > 31) || (func > 7));
return pci_conf_read(PCI_CONF_ADDRESS(bus, dev, func, reg), reg & 3, 1);
}
}
uint16_t pci_conf_read16(
unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
unsigned int reg)
{
u32 value;
if ( seg || reg > 255 )
{
pci_mmcfg_read(seg, bus, PCI_DEVFN(dev, func), reg, 2, &value);
return value;
}
else
{
BUG_ON((bus > 255) || (dev > 31) || (func > 7));
return pci_conf_read(PCI_CONF_ADDRESS(bus, dev, func, reg), reg & 2, 2);
}
}
uint32_t pci_conf_read32(
unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
unsigned int reg)
{
u32 value;
if ( seg || reg > 255 )
{
pci_mmcfg_read(seg, bus, PCI_DEVFN(dev, func), reg, 4, &value);
return value;
}
else
{
BUG_ON((bus > 255) || (dev > 31) || (func > 7));
return pci_conf_read(PCI_CONF_ADDRESS(bus, dev, func, reg), 0, 4);
}
}
void pci_conf_write8(
unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
unsigned int reg, uint8_t data)
{
if ( seg || reg > 255 )
pci_mmcfg_write(seg, bus, PCI_DEVFN(dev, func), reg, 1, data);
else
{
BUG_ON((bus > 255) || (dev > 31) || (func > 7));
pci_conf_write(PCI_CONF_ADDRESS(bus, dev, func, reg), reg & 3, 1, data);
}
}
void pci_conf_write16(
unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
unsigned int reg, uint16_t data)
{
if ( seg || reg > 255 )
pci_mmcfg_write(seg, bus, PCI_DEVFN(dev, func), reg, 2, data);
else
{
BUG_ON((bus > 255) || (dev > 31) || (func > 7));
pci_conf_write(PCI_CONF_ADDRESS(bus, dev, func, reg), reg & 2, 2, data);
}
}
void pci_conf_write32(
unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
unsigned int reg, uint32_t data)
{
if ( seg || reg > 255 )
pci_mmcfg_write(seg, bus, PCI_DEVFN(dev, func), reg, 4, data);
else
{
BUG_ON((bus > 255) || (dev > 31) || (func > 7));
pci_conf_write(PCI_CONF_ADDRESS(bus, dev, func, reg), 0, 4, data);
}
}
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