506 lines
13 KiB
C
506 lines
13 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: exregion - ACPI default op_region (address space) handlers
|
|
*
|
|
* Copyright (C) 2000 - 2018, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "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,
|
|
u64 *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 map_length;
|
|
acpi_size page_boundary_map_length;
|
|
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
|
|
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_ERROR((AE_INFO, "Invalid SystemMemory width %u",
|
|
bit_width));
|
|
return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
|
|
}
|
|
|
|
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
|
|
/*
|
|
* Hardware does not support non-aligned data transfers, we must verify
|
|
* the request.
|
|
*/
|
|
(void)acpi_ut_short_divide((u64) 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) ||
|
|
(((u64) address + length) > ((u64)
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* October 2009: Attempt to map from the requested address to the
|
|
* end of the region. However, we will never map more than one
|
|
* page, nor will we cross a page boundary.
|
|
*/
|
|
map_length = (acpi_size)
|
|
((mem_info->address + mem_info->length) - address);
|
|
|
|
/*
|
|
* If mapping the entire remaining portion of the region will cross
|
|
* a page boundary, just map up to the page boundary, do not cross.
|
|
* On some systems, crossing a page boundary while mapping regions
|
|
* can cause warnings if the pages have different attributes
|
|
* due to resource management.
|
|
*
|
|
* This has the added benefit of constraining a single mapping to
|
|
* one page, which is similar to the original code that used a 4k
|
|
* maximum window.
|
|
*/
|
|
page_boundary_map_length = (acpi_size)
|
|
(ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
|
|
if (page_boundary_map_length == 0) {
|
|
page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
|
|
}
|
|
|
|
if (map_length > page_boundary_map_length) {
|
|
map_length = page_boundary_map_length;
|
|
}
|
|
|
|
/* Create a new mapping starting at the address given */
|
|
|
|
mem_info->mapped_logical_address =
|
|
acpi_os_map_memory(address, map_length);
|
|
if (!mem_info->mapped_logical_address) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Could not map memory at 0x%8.8X%8.8X, size %u",
|
|
ACPI_FORMAT_UINT64(address),
|
|
(u32)map_length));
|
|
mem_info->mapped_length = 0;
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Save the physical address and mapping size */
|
|
|
|
mem_info->mapped_physical_address = address;
|
|
mem_info->mapped_length = map_length;
|
|
}
|
|
|
|
/*
|
|
* Generate a logical pointer corresponding to the address we want to
|
|
* access
|
|
*/
|
|
logical_addr_ptr = mem_info->mapped_logical_address +
|
|
((u64) address - (u64) mem_info->mapped_physical_address);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
|
|
bit_width, function, 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 = (u64)ACPI_GET8(logical_addr_ptr);
|
|
break;
|
|
|
|
case 16:
|
|
|
|
*value = (u64)ACPI_GET16(logical_addr_ptr);
|
|
break;
|
|
|
|
case 32:
|
|
|
|
*value = (u64)ACPI_GET32(logical_addr_ptr);
|
|
break;
|
|
|
|
case 64:
|
|
|
|
*value = (u64)ACPI_GET64(logical_addr_ptr);
|
|
break;
|
|
|
|
default:
|
|
|
|
/* bit_width was already validated */
|
|
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ACPI_WRITE:
|
|
|
|
switch (bit_width) {
|
|
case 8:
|
|
|
|
ACPI_SET8(logical_addr_ptr, *value);
|
|
break;
|
|
|
|
case 16:
|
|
|
|
ACPI_SET16(logical_addr_ptr, *value);
|
|
break;
|
|
|
|
case 32:
|
|
|
|
ACPI_SET32(logical_addr_ptr, *value);
|
|
break;
|
|
|
|
case 64:
|
|
|
|
ACPI_SET64(logical_addr_ptr, *value);
|
|
break;
|
|
|
|
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,
|
|
u64 *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 (width %u) R/W %u Address=%8.8X%8.8X\n",
|
|
bit_width, function, ACPI_FORMAT_UINT64(address)));
|
|
|
|
/* Decode the function parameter */
|
|
|
|
switch (function) {
|
|
case ACPI_READ:
|
|
|
|
status = acpi_hw_read_port((acpi_io_address)address,
|
|
&value32, bit_width);
|
|
*value = value32;
|
|
break;
|
|
|
|
case ACPI_WRITE:
|
|
|
|
status = acpi_hw_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,
|
|
u64 *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 %u (%u) 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,
|
|
u64 *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,
|
|
u64 *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,
|
|
u64 *value,
|
|
void *handler_context, void *region_context)
|
|
{
|
|
ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
|
|
|
|
/*
|
|
* Perform the memory read or write. The bit_width was already
|
|
* validated.
|
|
*/
|
|
switch (function) {
|
|
case ACPI_READ:
|
|
|
|
memcpy(ACPI_CAST_PTR(char, value),
|
|
ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width));
|
|
break;
|
|
|
|
case ACPI_WRITE:
|
|
|
|
memcpy(ACPI_PHYSADDR_TO_PTR(address),
|
|
ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
|
|
break;
|
|
|
|
default:
|
|
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|