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linux/drivers/acpi/executer/exregion.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore 
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

537 lines
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/******************************************************************************
*
* Module Name: exregion - ACPI default op_region (address space) handlers
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_EXECUTER
ACPI_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,
acpi_integer *value,
void *handler_context,
void *region_context)
{
acpi_status status = AE_OK;
void *logical_addr_ptr = NULL;
struct acpi_mem_space_context *mem_info = region_context;
u32 length;
acpi_size window_size;
#ifndef ACPI_MISALIGNED_TRANSFERS
u32 remainder;
#endif
ACPI_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;
case 64:
length = 8;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid system_memory width %d\n",
bit_width));
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
}
#ifndef ACPI_MISALIGNED_TRANSFERS
/*
* Hardware does not support non-aligned data transfers, we must verify
* the request.
*/
(void) acpi_ut_short_divide ((acpi_integer) address, length, NULL, &remainder);
if (remainder != 0) {
return_ACPI_STATUS (AE_AML_ALIGNMENT);
}
#endif
/*
* 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);
}
/*
* Don't attempt to map memory beyond the end of the region, and
* constrain the maximum mapping size to something reasonable.
*/
window_size = (acpi_size)
((mem_info->address + mem_info->length) - address);
if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) {
window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE;
}
/* Create a new mapping starting at the address given */
status = acpi_os_map_memory (address, window_size,
(void **) &mem_info->mapped_logical_address);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not map memory at %8.8X%8.8X, size %X\n",
ACPI_FORMAT_UINT64 (address), (u32) window_size));
mem_info->mapped_length = 0;
return_ACPI_STATUS (status);
}
/* Save the physical address and mapping size */
mem_info->mapped_physical_address = address;
mem_info->mapped_length = window_size;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
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,
ACPI_FORMAT_UINT64 (address)));
/*
* Perform the memory read or write
*
* Note: For machines that do not support non-aligned transfers, the target
* address was checked for alignment above. We do not attempt to break the
* transfer up into smaller (byte-size) chunks because the AML specifically
* asked for a transfer width that the hardware may require.
*/
switch (function) {
case ACPI_READ:
*value = 0;
switch (bit_width) {
case 8:
*value = (acpi_integer) *((u8 *) logical_addr_ptr);
break;
case 16:
*value = (acpi_integer) *((u16 *) logical_addr_ptr);
break;
case 32:
*value = (acpi_integer) *((u32 *) logical_addr_ptr);
break;
#if ACPI_MACHINE_WIDTH != 16
case 64:
*value = (acpi_integer) *((u64 *) logical_addr_ptr);
break;
#endif
default:
/* bit_width was already validated */
break;
}
break;
case ACPI_WRITE:
switch (bit_width) {
case 8:
*(u8 *) logical_addr_ptr = (u8) *value;
break;
case 16:
*(u16 *) logical_addr_ptr = (u16) *value;
break;
case 32:
*(u32 *) logical_addr_ptr = (u32) *value;
break;
#if ACPI_MACHINE_WIDTH != 16
case 64:
*(u64 *) logical_addr_ptr = (u64) *value;
break;
#endif
default:
/* bit_width was already validated */
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,
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);
}
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