C++ (Cpp) arch_pci_read_config 예제들

예제 #1

파일: pci.c 프로젝트: bufferoverflow/jailhouse

/**
 * Read from PCI config space.
 * @param bdf		16-bit bus/device/function ID of target.
 * @param address	Config space access address.
 * @param size		Access size (1, 2 or 4 bytes).
 *
 * @return Read value.
 *
 * @see pci_write_config
 */
u32 pci_read_config(u16 bdf, u16 address, unsigned int size)
{
	void *mmcfg_addr = pci_get_device_mmcfg_base(bdf) + address;

	if (!pci_space || PCI_BUS(bdf) > end_bus)
		return arch_pci_read_config(bdf, address, size);

	if (size == 1)
		return mmio_read8(mmcfg_addr);
	else if (size == 2)
		return mmio_read16(mmcfg_addr);
	else
		return mmio_read32(mmcfg_addr);
}

예제 #2

파일: pci.c 프로젝트: berte/jailhouse

/**
 * Handler for IN accesses to data port.
 * @param guest_regs	Guest register set.
 * @param device	Structure describing PCI device.
 * @param address	Config space access address.
 * @param size		Access size (1, 2 or 4 bytes).
 *
 * @return 1 if handled successfully, -1 on access error.
 *
 * @private
 */
static int
data_port_in_handler(struct registers *guest_regs, struct pci_device *device,
		     u16 address, unsigned int size)
{
	u32 reg_data;

	if (pci_cfg_read_moderate(device, address,
				  size, &reg_data) == PCI_ACCESS_PERFORM)
		reg_data = arch_pci_read_config(device->info->bdf, address,
						size);

	set_rax_reg(guest_regs, reg_data, size);

	return 1;
}