exregion.c

h内核

 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the System IO address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_system_io_space_handler (
	u32                             function,
	acpi_physical_address           address,
	u32                             bit_width,
	acpi_integer                    *value,
	void                            *handler_context,
	void                            *region_context)
{
	acpi_status                     status = AE_OK;
	u32                             value32;


	ACPI_FUNCTION_TRACE ("ex_system_io_space_handler");


	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
			"system_iO %d (%d width) Address=%8.8X%8.8X\n", function, bit_width,
			ACPI_FORMAT_UINT64 (address)));

	/* Decode the function parameter */

	switch (function) {
	case ACPI_READ:

		status = acpi_os_read_port ((acpi_io_address) address, &value32, bit_width);
		*value = value32;
		break;

	case ACPI_WRITE:

		status = acpi_os_write_port ((acpi_io_address) address, (u32) *value, bit_width);
		break;

	default:
		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_pci_config_space_handler
 *
 * PARAMETERS:  Function            - Read or Write operation
 *              Address             - Where in the space to read or write
 *              bit_width           - Field width in bits (8, 16, or 32)
 *              Value               - Pointer to in or out value
 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_pci_config_space_handler (
	u32                             function,
	acpi_physical_address           address,
	u32                             bit_width,
	acpi_integer                    *value,
	void                            *handler_context,
	void                            *region_context)
{
	acpi_status                     status = AE_OK;
	struct acpi_pci_id              *pci_id;
	u16                             pci_register;


	ACPI_FUNCTION_TRACE ("ex_pci_config_space_handler");


	/*
	 *  The arguments to acpi_os(Read|Write)pci_configuration are:
	 *
	 *  pci_segment is the PCI bus segment range 0-31
	 *  pci_bus     is the PCI bus number range 0-255
	 *  pci_device  is the PCI device number range 0-31
	 *  pci_function is the PCI device function number
	 *  pci_register is the Config space register range 0-255 bytes
	 *
	 *  Value - input value for write, output address for read
	 *
	 */
	pci_id      = (struct acpi_pci_id *) region_context;
	pci_register = (u16) (u32) address;

	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
		"pci_config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
		function, bit_width, pci_id->segment, pci_id->bus, pci_id->device,
		pci_id->function, pci_register));

	switch (function) {
	case ACPI_READ:

		*value = 0;
		status = acpi_os_read_pci_configuration (pci_id, pci_register, value, bit_width);
		break;

	case ACPI_WRITE:

		status = acpi_os_write_pci_configuration (pci_id, pci_register, *value, bit_width);
		break;

	default:

		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_cmos_space_handler
 *
 * PARAMETERS:  Function            - Read or Write operation
 *              Address             - Where in the space to read or write
 *              bit_width           - Field width in bits (8, 16, or 32)
 *              Value               - Pointer to in or out value
 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the CMOS address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_cmos_space_handler (
	u32                             function,
	acpi_physical_address           address,
	u32                             bit_width,
	acpi_integer                    *value,
	void                            *handler_context,
	void                            *region_context)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("ex_cmos_space_handler");


	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_pci_bar_space_handler
 *
 * PARAMETERS:  Function            - Read or Write operation
 *              Address             - Where in the space to read or write
 *              bit_width           - Field width in bits (8, 16, or 32)
 *              Value               - Pointer to in or out value
 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_pci_bar_space_handler (
	u32                             function,
	acpi_physical_address           address,
	u32                             bit_width,
	acpi_integer                    *value,
	void                            *handler_context,
	void                            *region_context)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("ex_pci_bar_space_handler");


	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_data_table_space_handler
 *
 * PARAMETERS:  Function            - Read or Write operation
 *              Address             - Where in the space to read or write
 *              bit_width           - Field width in bits (8, 16, or 32)
 *              Value               - Pointer to in or out value
 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the Data Table address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_data_table_space_handler (
	u32                             function,
	acpi_physical_address           address,
	u32                             bit_width,
	acpi_integer                    *value,
	void                            *handler_context,
	void                            *region_context)
{
	acpi_status                     status = AE_OK;
	u32                             byte_width = ACPI_DIV_8 (bit_width);
	u32                             i;
	char                            *logical_addr_ptr;


	ACPI_FUNCTION_TRACE ("ex_data_table_space_handler");


	logical_addr_ptr = ACPI_PHYSADDR_TO_PTR (address);


   /* Perform the memory read or write */

	switch (function) {
	case ACPI_READ:

		for (i = 0; i < byte_width; i++) {
			((char *) value) [i] = logical_addr_ptr[i];
		}
		break;

	case ACPI_WRITE:
	default:

		return_ACPI_STATUS (AE_SUPPORT);
	}

	return_ACPI_STATUS (status);
}