/*******************************************************************************
*
* 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);
}
/*
* 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
*/
page_boundary_map_length =
ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;
if (!page_boundary_map_length) {
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((acpi_physical_address) 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_NATIVE_UINT(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_NATIVE_UINT(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) = (u8) * value;
break;
case 16:
ACPI_SET16(logical_addr_ptr) = (u16) * value;
break;
case 32:
ACPI_SET32(logical_addr_ptr) = (u32) * value;
break;
case 64:
ACPI_SET64(logical_addr_ptr) = (u64) * value;
break;
default:
/* bit_width was already validated */
break;
}
break;
default:
status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* 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;
#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 %d",
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((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 */
mem_info->mapped_logical_address =
acpi_os_map_memory((acpi_native_uint) address, window_size);
if (!mem_info->mapped_logical_address) {
ACPI_ERROR((AE_INFO,
"Could not map memory at %8.8X%8.8X, size %X",
ACPI_FORMAT_UINT64(address),
(u32) window_size));
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 = 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 (width %d) R/W %d 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 = (acpi_integer) ACPI_GET8(logical_addr_ptr);
break;
case 16:
*value = (acpi_integer) ACPI_GET16(logical_addr_ptr);
break;
case 32:
*value = (acpi_integer) ACPI_GET32(logical_addr_ptr);
break;
case 64:
*value = (acpi_integer) 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) = (u8) * value;
break;
case 16:
ACPI_SET16(logical_addr_ptr) = (u16) * value;
break;
case 32:
ACPI_SET32(logical_addr_ptr) = (u32) * value;
break;
case 64:
ACPI_SET64(logical_addr_ptr) = (u64) * value;
break;
default:
/* bit_width was already validated */
break;
}
break;
default:
status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS(status);
}
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
void *LogicalAddrPtr = NULL;
ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
UINT32 Length;
ACPI_SIZE MapLength;
ACPI_SIZE PageBoundaryMapLength;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
UINT32 Remainder;
#endif
ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
/* Validate and translate the bit width */
switch (BitWidth)
{
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",
BitWidth));
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) AcpiUtShortDivide ((UINT64) 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 < MemInfo->MappedPhysicalAddress) ||
(((UINT64) Address + Length) >
((UINT64)
MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
{
/*
* The request cannot be resolved by the current memory mapping;
* Delete the existing mapping and create a new one.
*/
if (MemInfo->MappedLength)
{
/* Valid mapping, delete it */
AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
MemInfo->MappedLength);
}
/*
* 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.
*/
MapLength = (ACPI_SIZE)
((MemInfo->Address + MemInfo->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.
*/
PageBoundaryMapLength = (ACPI_SIZE)
(ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address);
if (PageBoundaryMapLength == 0)
{
PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
}
if (MapLength > PageBoundaryMapLength)
{
MapLength = PageBoundaryMapLength;
}
/* Create a new mapping starting at the address given */
MemInfo->MappedLogicalAddress = AcpiOsMapMemory (Address, MapLength);
if (!MemInfo->MappedLogicalAddress)
{
ACPI_ERROR ((AE_INFO,
"Could not map memory at 0x%8.8X%8.8X, size %u",
ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
MemInfo->MappedLength = 0;
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the physical address and mapping size */
MemInfo->MappedPhysicalAddress = Address;
MemInfo->MappedLength = MapLength;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
LogicalAddrPtr = MemInfo->MappedLogicalAddress +
((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
BitWidth, 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 (BitWidth)
{
case 8:
*Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
break;
case 16:
*Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
break;
case 32:
*Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
break;
case 64:
*Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
break;
default:
/* BitWidth was already validated */
break;
}
break;
case ACPI_WRITE:
switch (BitWidth)
{
case 8:
ACPI_SET8 (LogicalAddrPtr, *Value);
break;
case 16:
ACPI_SET16 (LogicalAddrPtr, *Value);
break;
case 32:
ACPI_SET32 (LogicalAddrPtr, *Value);
break;
case 64:
ACPI_SET64 (LogicalAddrPtr, *Value);
break;
default:
/* BitWidth was already validated */
break;
}
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
ACPI_INTEGER *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
void *LogicalAddrPtr = NULL;
ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
UINT32 Length;
ACPI_SIZE WindowSize;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
UINT32 Remainder;
#endif
ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
/* Validate and translate the bit width */
switch (BitWidth)
{
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 %d",
BitWidth));
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) AcpiUtShortDivide ((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 < MemInfo->MappedPhysicalAddress) ||
(((ACPI_INTEGER) Address + Length) >
((ACPI_INTEGER)
MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
{
/*
* The request cannot be resolved by the current memory mapping;
* Delete the existing mapping and create a new one.
*/
if (MemInfo->MappedLength)
{
/* Valid mapping, delete it */
AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
MemInfo->MappedLength);
}
/*
* Don't attempt to map memory beyond the end of the region, and
* constrain the maximum mapping size to something reasonable.
*/
WindowSize = (ACPI_SIZE)
((MemInfo->Address + MemInfo->Length) - Address);
if (WindowSize > ACPI_SYSMEM_REGION_WINDOW_SIZE)
{
WindowSize = ACPI_SYSMEM_REGION_WINDOW_SIZE;
}
/* Create a new mapping starting at the address given */
MemInfo->MappedLogicalAddress = AcpiOsMapMemory (
(ACPI_PHYSICAL_ADDRESS) Address, WindowSize);
if (!MemInfo->MappedLogicalAddress)
{
ACPI_ERROR ((AE_INFO,
"Could not map memory at %8.8X%8.8X, size %X",
ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) WindowSize));
MemInfo->MappedLength = 0;
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the physical address and mapping size */
MemInfo->MappedPhysicalAddress = Address;
MemInfo->MappedLength = WindowSize;
}
/*
* Generate a logical pointer corresponding to the address we want to
* access
*/
LogicalAddrPtr = MemInfo->MappedLogicalAddress +
((ACPI_INTEGER) Address - (ACPI_INTEGER) MemInfo->MappedPhysicalAddress);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (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 (BitWidth)
{
case 8:
*Value = (ACPI_INTEGER) ACPI_GET8 (LogicalAddrPtr);
break;
case 16:
*Value = (ACPI_INTEGER) ACPI_GET16 (LogicalAddrPtr);
break;
case 32:
*Value = (ACPI_INTEGER) ACPI_GET32 (LogicalAddrPtr);
break;
case 64:
*Value = (ACPI_INTEGER) ACPI_GET64 (LogicalAddrPtr);
break;
default:
/* BitWidth was already validated */
break;
}
break;
case ACPI_WRITE:
switch (BitWidth)
{
case 8:
ACPI_SET8 (LogicalAddrPtr) = (UINT8) *Value;
break;
case 16:
ACPI_SET16 (LogicalAddrPtr) = (UINT16) *Value;
break;
case 32:
ACPI_SET32 ( LogicalAddrPtr) = (UINT32) *Value;
break;
case 64:
ACPI_SET64 (LogicalAddrPtr) = (UINT64) *Value;
break;
default:
/* BitWidth was already validated */
break;
}
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
