Viewing file:  exregion.c (11.23 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/******************************************************************************
*
* Module Name: exregion - ACPI default Op_region (address space) handlers
* $Revision: 61 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acnamesp.h"
#include "achware.h"
#include "acevents.h"
#define _COMPONENT ACPI_EXECUTER
MODULE_NAME ("exregion")
/*******************************************************************************
*
* FUNCTION: Acpi_ex_system_memory_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 System Memory address space (Op Region)
*
******************************************************************************/
acpi_status
acpi_ex_system_memory_space_handler (
u32 function,
ACPI_PHYSICAL_ADDRESS address,
u32 bit_width,
u32 *value,
void *handler_context,
void *region_context)
{
acpi_status status = AE_OK;
void *logical_addr_ptr = NULL;
acpi_mem_space_context *mem_info = region_context;
u32 length;
FUNCTION_TRACE ("Ex_system_memory_space_handler");
/* Validate and translate the bit width */
switch (bit_width) {
case 8:
length = 1;
break;
case 16:
length = 2;
break;
case 32:
length = 4;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid System_memory width %d\n",
bit_width));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
break;
}
/*
* Does the request fit into the cached memory mapping?
* Is 1) Address below the current mapping? OR
* 2) Address beyond the current mapping?
*/
if ((address < mem_info->mapped_physical_address) ||
(((acpi_integer) address + length) >
((acpi_integer) mem_info->mapped_physical_address + mem_info->mapped_length))) {
/*
* The request cannot be resolved by the current memory mapping;
* Delete the existing mapping and create a new one.
*/
if (mem_info->mapped_length) {
/* Valid mapping, delete it */
acpi_os_unmap_memory (mem_info->mapped_logical_address,
mem_info->mapped_length);
}
mem_info->mapped_length = 0; /* In case of failure below */
/* Create a new mapping starting at the address given */
status = acpi_os_map_memory (address, SYSMEM_REGION_WINDOW_SIZE,
(void **) &mem_info->mapped_logical_address);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Save the physical address and mapping size */
mem_info->mapped_physical_address = address;
mem_info->mapped_length = SYSMEM_REGION_WINDOW_SIZE;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
/* TBD: should these pointers go to 64-bit in all cases ? */
logical_addr_ptr = mem_info->mapped_logical_address +
((acpi_integer) address - (acpi_integer) mem_info->mapped_physical_address);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System_memory %d (%d width) Address=%8.8X%8.8X\n", function, bit_width,
HIDWORD (address), LODWORD (address)));
/* Perform the memory read or write */
switch (function) {
case ACPI_READ_ADR_SPACE:
switch (bit_width) {
case 8:
*value = (u32)* (u8 *) logical_addr_ptr;
break;
case 16:
MOVE_UNALIGNED16_TO_32 (value, logical_addr_ptr);
break;
case 32:
MOVE_UNALIGNED32_TO_32 (value, logical_addr_ptr);
break;
}
break;
case ACPI_WRITE_ADR_SPACE:
switch (bit_width) {
case 8:
*(u8 *) logical_addr_ptr = (u8) *value;
break;
case 16:
MOVE_UNALIGNED16_TO_16 (logical_addr_ptr, value);
break;
case 32:
MOVE_UNALIGNED32_TO_32 (logical_addr_ptr, value);
break;
}
break;
default:
status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ex_system_io_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 System IO address space (Op Region)
*
******************************************************************************/
acpi_status
acpi_ex_system_io_space_handler (
u32 function,
ACPI_PHYSICAL_ADDRESS address,
u32 bit_width,
u32 *value,
void *handler_context,
void *region_context)
{
acpi_status status = AE_OK;
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,
HIDWORD (address), LODWORD (address)));
/* Decode the function parameter */
switch (function) {
case ACPI_READ_ADR_SPACE:
*value = 0;
status = acpi_os_read_port ((ACPI_IO_ADDRESS) address, value, bit_width);
break;
case ACPI_WRITE_ADR_SPACE:
status = acpi_os_write_port ((ACPI_IO_ADDRESS) address, *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,
u32 *value,
void *handler_context,
void *region_context)
{
acpi_status status = AE_OK;
acpi_pci_id *pci_id;
u16 pci_register;
FUNCTION_TRACE ("Ex_pci_config_space_handler");
/*
* The arguments to Acpi_os(Read|Write)Pci_cfg(Byte|Word|Dword) 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 = (acpi_pci_id *) region_context;
pci_register = (u16) 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_ADR_SPACE:
*value = 0;
status = acpi_os_read_pci_configuration (pci_id, pci_register, value, bit_width);
break;
case ACPI_WRITE_ADR_SPACE:
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,
u32 *value,
void *handler_context,
void *region_context)
{
acpi_status status = AE_OK;
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,
u32 *value,
void *handler_context,
void *region_context)
{
acpi_status status = AE_OK;
FUNCTION_TRACE ("Ex_pci_bar_space_handler");
return_ACPI_STATUS (status);
}
|