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|
/******************************************************************************
*
* Module Name: amregion - ACPI default Op_region (address space) handlers
* $Revision: 41 $
*
*****************************************************************************/
/*
* Copyright (C) 2000 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 INTERPRETER
MODULE_NAME ("amregion")
/*******************************************************************************
*
* FUNCTION: Acpi_aml_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_aml_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;
MEM_HANDLER_CONTEXT *mem_info = region_context;
u32 length;
/* 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:
return (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) ||
((address + length) >
(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 (status);
}
/* TBD: should these pointers go to 64-bit in all cases ? */
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 +
(address - mem_info->mapped_physical_address);
/* Perform the memory read or write */
switch (function)
{
case ADDRESS_SPACE_READ:
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 ADDRESS_SPACE_WRITE:
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 (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_aml_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_aml_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;
/* Decode the function parameter */
switch (function)
{
case ADDRESS_SPACE_READ:
switch (bit_width)
{
/* I/O Port width */
case 8:
*value = (u32) acpi_os_in8 ((ACPI_IO_ADDRESS) address);
break;
case 16:
*value = (u32) acpi_os_in16 ((ACPI_IO_ADDRESS) address);
break;
case 32:
*value = acpi_os_in32 ((ACPI_IO_ADDRESS) address);
break;
default:
status = AE_AML_OPERAND_VALUE;
}
break;
case ADDRESS_SPACE_WRITE:
switch (bit_width)
{
/* I/O Port width */
case 8:
acpi_os_out8 ((ACPI_IO_ADDRESS) address, (u8) *value);
break;
case 16:
acpi_os_out16 ((ACPI_IO_ADDRESS) address, (u16) *value);
break;
case 32:
acpi_os_out32 ((ACPI_IO_ADDRESS) address, *value);
break;
default:
status = AE_AML_OPERAND_VALUE;
}
break;
default:
status = AE_BAD_PARAMETER;
break;
}
return (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_aml_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_aml_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;
u32 pci_bus;
u32 dev_func;
u8 pci_reg;
PCI_HANDLER_CONTEXT *PCIcontext;
/*
* The arguments to Acpi_os(Read|Write)Pci_cfg(Byte|Word|Dword) are:
*
* Seg_bus - 0xSSSSBBBB - SSSS is the PCI bus segment
* BBBB is the PCI bus number
*
* Dev_func - 0xDDDDFFFF - DDDD is the PCI device number
* FFFF is the PCI device function number
*
* Reg_num - Config space register must be < 40h
*
* Value - input value for write, output for read
*
*/
PCIcontext = (PCI_HANDLER_CONTEXT *) region_context;
pci_bus = LOWORD(PCIcontext->seg) << 16;
pci_bus |= LOWORD(PCIcontext->bus);
dev_func = PCIcontext->dev_func;
pci_reg = (u8) address;
switch (function)
{
case ADDRESS_SPACE_READ:
*value = 0;
switch (bit_width)
{
/* PCI Register width */
case 8:
status = acpi_os_read_pci_cfg_byte (pci_bus, dev_func, pci_reg,
(u8 *) value);
break;
case 16:
status = acpi_os_read_pci_cfg_word (pci_bus, dev_func, pci_reg,
(u16 *) value);
break;
case 32:
status = acpi_os_read_pci_cfg_dword (pci_bus, dev_func, pci_reg,
value);
break;
default:
status = AE_AML_OPERAND_VALUE;
} /* Switch bit_width */
break;
case ADDRESS_SPACE_WRITE:
switch (bit_width)
{
/* PCI Register width */
case 8:
status = acpi_os_write_pci_cfg_byte (pci_bus, dev_func, pci_reg,
*(u8 *) value);
break;
case 16:
status = acpi_os_write_pci_cfg_word (pci_bus, dev_func, pci_reg,
*(u16 *) value);
break;
case 32:
status = acpi_os_write_pci_cfg_dword (pci_bus, dev_func, pci_reg,
*value);
break;
default:
status = AE_AML_OPERAND_VALUE;
} /* Switch bit_width */
break;
default:
status = AE_BAD_PARAMETER;
break;
}
return (status);
}
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