ACPI_STATUS
acpi_tb_map_acpi_table (
ACPI_PHYSICAL_ADDRESS physical_address,
u32 *size,
void **logical_address)
{
ACPI_TABLE_HEADER *table;
u32 table_size = *size;
ACPI_STATUS status = AE_OK;
/* If size is zero, look at the table header to get the actual size */
if ((*size) == 0) {
/* Get the table header so we can extract the table length */
status = acpi_os_map_memory (physical_address, sizeof (ACPI_TABLE_HEADER),
(void **) &table);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Extract the full table length before we delete the mapping */
table_size = table->length;
/*
* Validate the header and delete the mapping.
* We will create a mapping for the full table below.
*/
status = acpi_tb_validate_table_header (table);
/* Always unmap the memory for the header */
acpi_os_unmap_memory (table, sizeof (ACPI_TABLE_HEADER));
/* Exit if header invalid */
if (ACPI_FAILURE (status)) {
return (status);
}
}
/* Map the physical memory for the correct length */
status = acpi_os_map_memory (physical_address, table_size, (void **) &table);
if (ACPI_FAILURE (status)) {
return (status);
}
*size = table_size;
*logical_address = table;
return (status);
}
/******************************************************************************
*
* FUNCTION: acpi_tb_verify_table
*
* PARAMETERS: table_desc - table
*
* RETURN: Status
*
* DESCRIPTION: this function is called to verify and map table
*
*****************************************************************************/
acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_verify_table);
/* Map the table if necessary */
if (!table_desc->pointer) {
if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED) {
table_desc->pointer =
acpi_os_map_memory(table_desc->address,
table_desc->length);
}
if (!table_desc->pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
}
/* FACS is the odd table, has no standard ACPI header and no checksum */
if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
/* Always calculate checksum, ignore bad checksum if requested */
status =
acpi_tb_verify_checksum(table_desc->pointer,
table_desc->length);
}
return_ACPI_STATUS(status);
}
/******************************************************************************
*
* FUNCTION: acpi_tb_verify_table
*
* PARAMETERS: table_desc - table
*
* RETURN: Status
*
* DESCRIPTION: this function is called to verify and map table
*
*****************************************************************************/
acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_verify_table);
/* Map the table if necessary */
if (!table_desc->pointer) {
if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED) {
table_desc->pointer =
acpi_os_map_memory(table_desc->address,
table_desc->length);
}
if (!table_desc->pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
}
/* Always calculate checksum, ignore bad checksum if requested */
status =
acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
return_ACPI_STATUS(status);
}
acpi_status
acpi_tb_get_table_header (
struct acpi_pointer *address,
struct acpi_table_header *return_header)
{
acpi_status status = AE_OK;
struct acpi_table_header *header = NULL;
ACPI_FUNCTION_TRACE ("tb_get_table_header");
/*
* Flags contains the current processor mode (Virtual or Physical
* addressing) The pointer_type is either Logical or Physical
*/
switch (address->pointer_type) {
case ACPI_PHYSMODE_PHYSPTR:
case ACPI_LOGMODE_LOGPTR:
/* Pointer matches processor mode, copy the header */
ACPI_MEMCPY (return_header, address->pointer.logical,
sizeof (struct acpi_table_header));
break;
case ACPI_LOGMODE_PHYSPTR:
/* Create a logical address for the physical pointer*/
status = acpi_os_map_memory (address->pointer.physical,
sizeof (struct acpi_table_header), (void *) &header);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR ((
"Could not map memory at %8.8X%8.8X for length %X\n",
ACPI_FORMAT_UINT64 (address->pointer.physical),
sizeof (struct acpi_table_header)));
return_ACPI_STATUS (status);
}
/* Copy header and delete mapping */
ACPI_MEMCPY (return_header, header, sizeof (struct acpi_table_header));
acpi_os_unmap_memory (header, sizeof (struct acpi_table_header));
break;
default:
ACPI_REPORT_ERROR (("Invalid address flags %X\n",
address->pointer_type));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Table Signature: [%4.4s]\n",
return_header->signature));
return_ACPI_STATUS (AE_OK);
}
void acpi_tb_parse_fadt(u32 table_index)
{
u32 length;
struct acpi_table_header *table;
length = acpi_gbl_root_table_list.tables[table_index].length;
table =
acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
address, length);
if (!table) {
return;
}
(void)acpi_tb_verify_checksum(table, length);
acpi_tb_create_local_fadt(table, length);
acpi_os_unmap_memory(table, length);
acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
}
acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_verify_table);
if (!table_desc->pointer) {
if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED) {
table_desc->pointer =
acpi_os_map_memory(table_desc->address,
table_desc->length);
}
if (!table_desc->pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
}
if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
status =
acpi_tb_verify_checksum(table_desc->pointer,
table_desc->length);
}
return_ACPI_STATUS(status);
}
/******************************************************************************
*
* FUNCTION: acpi_get_table_header
*
* PARAMETERS: Signature - ACPI signature of needed table
* Instance - Which instance (for SSDTs)
* out_table_header - The pointer to the table header to fill
*
* RETURN: Status and pointer to mapped table header
*
* DESCRIPTION: Finds an ACPI table header.
*
* NOTE: Caller is responsible in unmapping the header with
* acpi_os_unmap_memory
*
*****************************************************************************/
acpi_status
acpi_get_table_header(char *signature,
acpi_native_uint instance,
struct acpi_table_header * out_table_header)
{
acpi_native_uint i;
acpi_native_uint j;
struct acpi_table_header *header;
/* Parameter validation */
if (!signature || !out_table_header) {
return (AE_BAD_PARAMETER);
}
/*
* Walk the root table list
*/
for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
if (!ACPI_COMPARE_NAME
(&(acpi_gbl_root_table_list.tables[i].signature),
signature)) {
continue;
}
if (++j < instance) {
continue;
}
if (!acpi_gbl_root_table_list.tables[i].pointer) {
if ((acpi_gbl_root_table_list.tables[i].
flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED) {
header =
acpi_os_map_memory(acpi_gbl_root_table_list.
tables[i].address,
sizeof(struct
acpi_table_header));
if (!header) {
return AE_NO_MEMORY;
}
ACPI_MEMCPY(out_table_header, header,
sizeof(struct acpi_table_header));
acpi_os_unmap_memory(header,
sizeof(struct
acpi_table_header));
} else {
return AE_NOT_FOUND;
}
} else {
ACPI_MEMCPY(out_table_header,
acpi_gbl_root_table_list.tables[i].pointer,
sizeof(struct acpi_table_header));
}
return (AE_OK);
}
return (AE_NOT_FOUND);
}
static acpi_status
acpi_tb_check_xsdt(acpi_physical_address address)
{
struct acpi_table_header *table;
u32 length;
u64 xsdt_entry_address;
u8 *table_entry;
u32 table_count;
int i;
/* map table header, verify length */
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
if (!table)
return AE_NO_MEMORY;
length = table->length; /* length of entire table, incl header */
acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
if (length < sizeof(struct acpi_table_header))
return AE_INVALID_TABLE_LENGTH;
/* map entire table, not just header */
table = acpi_os_map_memory(address, length);
if (!table)
return AE_NO_MEMORY;
/* Calculate the number of tables described in XSDT */
table_count =
(u32) ((table->length -
sizeof(struct acpi_table_header)) / sizeof(u64));
table_entry =
ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
for (i = 0; i < table_count; i++) {
ACPI_MOVE_64_TO_64(&xsdt_entry_address, table_entry);
if (!xsdt_entry_address) {
/* XSDT has NULL entry */
break;
}
table_entry += sizeof(u64);
}
acpi_os_unmap_memory(table, length);
if (i < table_count)
return AE_NULL_ENTRY;
else
return AE_OK;
}
static acpi_status
acpi_table_initrd_override(struct acpi_table_header *existing_table,
acpi_physical_address *address, u32 *length)
{
int table_offset = 0;
int table_index = 0;
struct acpi_table_header *table;
u32 table_length;
*length = 0;
*address = 0;
if (!acpi_tables_addr)
return AE_OK;
while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
table = acpi_os_map_memory(acpi_tables_addr + table_offset,
ACPI_HEADER_SIZE);
if (table_offset + table->length > all_tables_size) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
WARN_ON(1);
return AE_OK;
}
table_length = table->length;
/* Only override tables matched */
if (memcmp(existing_table->signature, table->signature, 4) ||
memcmp(table->oem_id, existing_table->oem_id,
ACPI_OEM_ID_SIZE) ||
memcmp(table->oem_table_id, existing_table->oem_table_id,
ACPI_OEM_TABLE_ID_SIZE)) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
goto next_table;
}
/*
* Mark the table to avoid being used in
* acpi_table_initrd_scan() and check the revision.
*/
if (test_and_set_bit(table_index, acpi_initrd_installed) ||
existing_table->oem_revision >= table->oem_revision) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
goto next_table;
}
*length = table_length;
*address = acpi_tables_addr + table_offset;
pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n",
table->signature, table->oem_id,
table->oem_table_id);
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
break;
next_table:
table_offset += table_length;
table_index++;
}
return AE_OK;
}
void acpi_tb_parse_fadt(u32 table_index)
{
u32 length;
struct acpi_table_header *table;
/*
* The FADT has multiple versions with different lengths,
* and it contains pointers to both the DSDT and FACS tables.
*
* Get a local copy of the FADT and convert it to a common format
* Map entire FADT, assumed to be smaller than one page.
*/
length = acpi_gbl_root_table_list.tables[table_index].length;
table =
acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
address, length);
if (!table) {
return;
}
/*
* Validate the FADT checksum before we copy the table. Ignore
* checksum error as we want to try to get the DSDT and FACS.
*/
(void)acpi_tb_verify_checksum(table, length);
/* Create a local copy of the FADT in common ACPI 2.0+ format */
acpi_tb_create_local_fadt(table, length);
/* All done with the real FADT, unmap it */
acpi_os_unmap_memory(table, length);
/* Obtain the DSDT and FACS tables via their addresses within the FADT */
acpi_tb_install_fixed_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
ACPI_SIG_DSDT, &acpi_gbl_dsdt_index);
/* If Hardware Reduced flag is set, there is no FACS */
if (!acpi_gbl_reduced_hardware) {
if (acpi_gbl_FADT.facs) {
acpi_tb_install_fixed_table((acpi_physical_address)
acpi_gbl_FADT.facs,
ACPI_SIG_FACS,
&acpi_gbl_facs_index);
}
if (acpi_gbl_FADT.Xfacs) {
acpi_tb_install_fixed_table((acpi_physical_address)
acpi_gbl_FADT.Xfacs,
ACPI_SIG_FACS,
&acpi_gbl_xfacs_index);
}
}
}
static acpi_status
acpi_tb_check_xsdt(acpi_physical_address address)
{
struct acpi_table_header *table;
u32 length;
u64 xsdt_entry_address;
u8 *table_entry;
u32 table_count;
int i;
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
if (!table)
return AE_NO_MEMORY;
length = table->length;
acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
if (length < sizeof(struct acpi_table_header))
return AE_INVALID_TABLE_LENGTH;
table = acpi_os_map_memory(address, length);
if (!table)
return AE_NO_MEMORY;
table_count =
(u32) ((table->length -
sizeof(struct acpi_table_header)) / sizeof(u64));
table_entry =
ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
for (i = 0; i < table_count; i++) {
ACPI_MOVE_64_TO_64(&xsdt_entry_address, table_entry);
if (!xsdt_entry_address) {
break;
}
table_entry += sizeof(u64);
}
acpi_os_unmap_memory(table, length);
if (i < table_count)
return AE_NULL_ENTRY;
else
return AE_OK;
}
static void __init acpi_table_initrd_scan(void)
{
int table_offset = 0;
int table_index = 0;
u32 table_length;
struct acpi_table_header *table;
if (!acpi_tables_addr)
return;
while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
table = acpi_os_map_memory(acpi_tables_addr + table_offset,
ACPI_HEADER_SIZE);
if (table_offset + table->length > all_tables_size) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
WARN_ON(1);
return;
}
table_length = table->length;
/* Skip RSDT/XSDT which should only be used for override */
if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) ||
ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
goto next_table;
}
/*
* Mark the table to avoid being used in
* acpi_table_initrd_override(). Though this is not possible
* because override is disabled in acpi_install_table().
*/
if (test_and_set_bit(table_index, acpi_initrd_installed)) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
goto next_table;
}
pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n",
table->signature, table->oem_id,
table->oem_table_id);
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
acpi_install_table(acpi_tables_addr + table_offset, TRUE);
next_table:
table_offset += table_length;
table_index++;
}
}
acpi_status
acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
acpi_physical_address address, u8 flags)
{
struct acpi_table_header *table_header;
switch (flags & ACPI_TABLE_ORIGIN_MASK) {
case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
/* Get the length of the full table from the header */
table_header =
acpi_os_map_memory(address,
sizeof(struct acpi_table_header));
if (!table_header) {
return (AE_NO_MEMORY);
}
acpi_tb_init_table_descriptor(table_desc, address, flags,
table_header);
acpi_os_unmap_memory(table_header,
sizeof(struct acpi_table_header));
return (AE_OK);
case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
table_header = ACPI_CAST_PTR(struct acpi_table_header,
ACPI_PHYSADDR_TO_PTR(address));
if (!table_header) {
return (AE_NO_MEMORY);
}
acpi_tb_init_table_descriptor(table_desc, address, flags,
table_header);
return (AE_OK);
default:
break;
}
/* Table is not valid yet */
return (AE_NO_MEMORY);
}
static acpi_status osl_load_rsdp(void)
{
struct acpi_table_header *mapped_table;
u8 *rsdp_address;
acpi_physical_address rsdp_base;
acpi_size rsdp_size;
/* Get RSDP from memory */
rsdp_size = sizeof(struct acpi_table_rsdp);
if (gbl_rsdp_base) {
rsdp_base = gbl_rsdp_base;
} else {
rsdp_base = osl_find_rsdp_via_efi();
}
if (!rsdp_base) {
rsdp_base = ACPI_HI_RSDP_WINDOW_BASE;
rsdp_size = ACPI_HI_RSDP_WINDOW_SIZE;
}
rsdp_address = acpi_os_map_memory(rsdp_base, rsdp_size);
if (!rsdp_address) {
return (osl_get_last_status(AE_BAD_ADDRESS));
}
/* Search low memory for the RSDP */
mapped_table = ACPI_CAST_PTR(struct acpi_table_header,
acpi_tb_scan_memory_for_rsdp(rsdp_address,
rsdp_size));
if (!mapped_table) {
acpi_os_unmap_memory(rsdp_address, rsdp_size);
return (AE_NOT_FOUND);
}
gbl_rsdp_address =
rsdp_base + (ACPI_CAST8(mapped_table) - rsdp_address);
memcpy(&gbl_rsdp, mapped_table, sizeof(struct acpi_table_rsdp));
acpi_os_unmap_memory(rsdp_address, rsdp_size);
return (AE_OK);
}
void __init acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
{
u32 length;
struct acpi_table_header *table;
/*
* The FADT has multiple versions with different lengths,
* and it contains pointers to both the DSDT and FACS tables.
*
* Get a local copy of the FADT and convert it to a common format
* Map entire FADT, assumed to be smaller than one page.
*/
length = acpi_gbl_root_table_list.tables[table_index].length;
table =
acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
address, length);
if (!table) {
return;
}
/*
* Validate the FADT checksum before we copy the table. Ignore
* checksum error as we want to try to get the DSDT and FACS.
*/
(void)acpi_tb_verify_checksum(table, length);
/* Obtain a local copy of the FADT in common ACPI 2.0+ format */
acpi_tb_create_local_fadt(table, length);
/* All done with the real FADT, unmap it */
acpi_os_unmap_memory(table, length);
/* Obtain the DSDT and FACS tables via their addresses within the FADT */
acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
}
int acpi_os_map_generic_address(struct acpi_generic_address *gas)
{
u64 addr;
void __iomem *virt;
if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
return 0;
/* Handle possible alignment issues */
memcpy(&addr, &gas->address, sizeof(addr));
if (!addr || !gas->bit_width)
return -EINVAL;
virt = acpi_os_map_memory(addr, gas->bit_width / 8);
if (!virt)
return -EIO;
return 0;
}
struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
*table_header,
struct acpi_table_desc
*table_desc)
{
acpi_status status;
struct acpi_table_header *new_table = NULL;
acpi_physical_address new_address = 0;
u32 new_table_length = 0;
u8 new_flags;
char *override_type;
/* (1) Attempt logical override (returns a logical address) */
status = acpi_os_table_override(table_header, &new_table);
if (ACPI_SUCCESS(status) && new_table) {
new_address = ACPI_PTR_TO_PHYSADDR(new_table);
new_table_length = new_table->length;
new_flags = ACPI_TABLE_ORIGIN_OVERRIDE;
override_type = "Logical";
goto finish_override;
}
/* (2) Attempt physical override (returns a physical address) */
status = acpi_os_physical_table_override(table_header,
&new_address,
&new_table_length);
if (ACPI_SUCCESS(status) && new_address && new_table_length) {
/* Map the entire new table */
new_table = acpi_os_map_memory(new_address, new_table_length);
if (!new_table) {
ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
"%4.4s %p Attempted physical table override failed",
table_header->signature,
ACPI_CAST_PTR(void,
table_desc->address)));
return (NULL);
}
acpi_status
acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
struct acpi_table_header **table_ptr,
u32 *table_length, u8 *table_flags)
{
struct acpi_table_header *table = NULL;
switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
table =
acpi_os_map_memory(table_desc->address, table_desc->length);
break;
case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
table = ACPI_CAST_PTR(struct acpi_table_header,
ACPI_PHYSADDR_TO_PTR(table_desc->
address));
break;
default:
break;
}
/* Table is not valid yet */
if (!table) {
return (AE_NO_MEMORY);
}
/* Fill the return values */
*table_ptr = table;
*table_length = table_desc->length;
*table_flags = table_desc->flags;
return (AE_OK);
}
void
acpi_tb_install_table(acpi_physical_address address,
char *signature, u32 table_index)
{
struct acpi_table_header *table;
struct acpi_table_header *final_table;
struct acpi_table_desc *table_desc;
if (!address) {
ACPI_ERROR((AE_INFO,
"Null physical address for ACPI table [%s]",
signature));
return;
}
/* Map just the table header */
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
if (!table) {
ACPI_ERROR((AE_INFO,
"Could not map memory for table [%s] at %p",
signature, ACPI_CAST_PTR(void, address)));
return;
}
acpi_status
acpi_os_physical_table_override(struct acpi_table_header *existing_table,
acpi_physical_address *address,
u32 *table_length)
{
#ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
*table_length = 0;
*address = 0;
return AE_OK;
#else
int table_offset = 0;
struct acpi_table_header *table;
*table_length = 0;
*address = 0;
if (!acpi_tables_addr)
return AE_OK;
do {
if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
WARN_ON(1);
return AE_OK;
}
table = acpi_os_map_memory(acpi_tables_addr + table_offset,
ACPI_HEADER_SIZE);
if (table_offset + table->length > all_tables_size) {
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
WARN_ON(1);
return AE_OK;
}
table_offset += table->length;
if (memcmp(existing_table->signature, table->signature, 4)) {
acpi_os_unmap_memory(table,
ACPI_HEADER_SIZE);
continue;
}
/* Only override tables with matching oem id */
if (memcmp(table->oem_table_id, existing_table->oem_table_id,
ACPI_OEM_TABLE_ID_SIZE)) {
acpi_os_unmap_memory(table,
ACPI_HEADER_SIZE);
continue;
}
table_offset -= table->length;
*table_length = table->length;
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
*address = acpi_tables_addr + table_offset;
break;
} while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
if (*address != 0)
acpi_table_taint(existing_table);
return AE_OK;
#endif
}
static acpi_status
acpi_tb_get_this_table (
struct acpi_pointer *address,
struct acpi_table_header *header,
struct acpi_table_desc *table_info)
{
struct acpi_table_header *full_table = NULL;
u8 allocation;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE ("tb_get_this_table");
/*
* Flags contains the current processor mode (Virtual or Physical
* addressing) The pointer_type is either Logical or Physical
*/
switch (address->pointer_type) {
case ACPI_PHYSMODE_PHYSPTR:
case ACPI_LOGMODE_LOGPTR:
/* Pointer matches processor mode, copy the table to a new buffer */
full_table = ACPI_MEM_ALLOCATE (header->length);
if (!full_table) {
ACPI_REPORT_ERROR ((
"Could not allocate table memory for [%4.4s] length %X\n",
header->signature, header->length));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the entire table (including header) to the local buffer */
ACPI_MEMCPY (full_table, address->pointer.logical, header->length);
/* Save allocation type */
allocation = ACPI_MEM_ALLOCATED;
break;
case ACPI_LOGMODE_PHYSPTR:
/*
* Just map the table's physical memory
* into our address space.
*/
status = acpi_os_map_memory (address->pointer.physical,
(acpi_size) header->length, (void *) &full_table);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR ((
"Could not map memory for table [%4.4s] at %8.8X%8.8X for length %X\n",
header->signature,
ACPI_FORMAT_UINT64 (address->pointer.physical),
header->length));
return (status);
}
/* Save allocation type */
allocation = ACPI_MEM_MAPPED;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid address flags %X\n",
address->pointer_type));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Validate checksum for _most_ tables,
* even the ones whose signature we don't recognize
*/
if (table_info->type != ACPI_TABLE_FACS) {
status = acpi_tb_verify_table_checksum (full_table);
#if (!ACPI_CHECKSUM_ABORT)
if (ACPI_FAILURE (status)) {
/* Ignore the error if configuration says so */
status = AE_OK;
}
#endif
}
/* Return values */
table_info->pointer = full_table;
table_info->length = (acpi_size) header->length;
table_info->allocation = allocation;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Found table [%4.4s] at %8.8X%8.8X, mapped/copied to %p\n",
full_table->signature,
ACPI_FORMAT_UINT64 (address->pointer.physical), full_table));
return_ACPI_STATUS (status);
}
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);
}
static int __init pvh_setup_acpi(struct domain *d, paddr_t start_info)
{
unsigned long pfn, nr_pages;
paddr_t madt_paddr, xsdt_paddr, rsdp_paddr;
unsigned int i;
int rc;
struct acpi_table_rsdp *native_rsdp, rsdp = {
.signature = ACPI_SIG_RSDP,
.revision = 2,
.length = sizeof(rsdp),
};
/* Scan top-level tables and add their regions to the guest memory map. */
for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
{
const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
unsigned long addr = acpi_gbl_root_table_list.tables[i].address;
unsigned long size = acpi_gbl_root_table_list.tables[i].length;
/*
* Make sure the original MADT is also mapped, so that Dom0 can
* properly access the data returned by _MAT methods in case it's
* re-using MADT memory.
*/
if ( strncmp(sig, ACPI_SIG_MADT, ACPI_NAME_SIZE)
? pvh_acpi_table_allowed(sig)
: !acpi_memory_banned(addr, size) )
pvh_add_mem_range(d, addr, addr + size, E820_ACPI);
}
/* Identity map ACPI e820 regions. */
for ( i = 0; i < d->arch.nr_e820; i++ )
{
if ( d->arch.e820[i].type != E820_ACPI &&
d->arch.e820[i].type != E820_NVS )
continue;
pfn = PFN_DOWN(d->arch.e820[i].addr);
nr_pages = PFN_UP((d->arch.e820[i].addr & ~PAGE_MASK) +
d->arch.e820[i].size);
rc = modify_identity_mmio(d, pfn, nr_pages, true);
if ( rc )
{
printk("Failed to map ACPI region [%#lx, %#lx) into Dom0 memory map\n",
pfn, pfn + nr_pages);
return rc;
}
}
rc = pvh_setup_acpi_madt(d, &madt_paddr);
if ( rc )
return rc;
rc = pvh_setup_acpi_xsdt(d, madt_paddr, &xsdt_paddr);
if ( rc )
return rc;
/* Craft a custom RSDP. */
native_rsdp = acpi_os_map_memory(acpi_os_get_root_pointer(), sizeof(rsdp));
if ( !native_rsdp )
{
printk("Failed to map native RSDP\n");
return -ENOMEM;
}
memcpy(rsdp.oem_id, native_rsdp->oem_id, sizeof(rsdp.oem_id));
acpi_os_unmap_memory(native_rsdp, sizeof(rsdp));
rsdp.xsdt_physical_address = xsdt_paddr;
/*
* Calling acpi_tb_checksum here is a layering violation, but
* introducing a wrapper for such simple usage seems overkill.
*/
rsdp.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, &rsdp),
ACPI_RSDP_REV0_SIZE);
rsdp.extended_checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, &rsdp),
sizeof(rsdp));
/*
* Place the new RSDP in guest memory space.
*
* NB: this RSDP is not going to replace the original RSDP, which should
* still be accessible to the guest. However that RSDP is going to point to
* the native RSDT, and should not be used for the Dom0 kernel's boot
* purposes (we keep it visible for post boot access).
*/
if ( pvh_steal_ram(d, sizeof(rsdp), 0, GB(4), &rsdp_paddr) )
{
printk("Unable to allocate guest RAM for RSDP\n");
return -ENOMEM;
}
/* Mark this region as E820_ACPI. */
if ( pvh_add_mem_range(d, rsdp_paddr, rsdp_paddr + sizeof(rsdp),
E820_ACPI) )
printk("Unable to add RSDP region to memory map\n");
/* Copy RSDP into guest memory. */
rc = hvm_copy_to_guest_phys(rsdp_paddr, &rsdp, sizeof(rsdp), d->vcpu[0]);
if ( rc )
{
printk("Unable to copy RSDP into guest memory\n");
return rc;
}
/* Copy RSDP address to start_info. */
rc = hvm_copy_to_guest_phys(start_info +
offsetof(struct hvm_start_info, rsdp_paddr),
&rsdp_paddr,
sizeof(((struct hvm_start_info *)
0)->rsdp_paddr),
d->vcpu[0]);
if ( rc )
{
printk("Unable to copy RSDP into guest memory\n");
return rc;
}
return 0;
}
int __init dom0_construct_pvh(struct domain *d, const module_t *image,
unsigned long image_headroom,
module_t *initrd,
void *(*bootstrap_map)(const module_t *),
char *cmdline)
{
paddr_t entry, start_info;
int rc;
printk("** Building a PVH Dom0 **\n");
iommu_hwdom_init(d);
rc = pvh_setup_p2m(d);
if ( rc )
{
printk("Failed to setup Dom0 physical memory map\n");
return rc;
}
rc = pvh_load_kernel(d, image, image_headroom, initrd, bootstrap_map(image),
cmdline, &entry, &start_info);
if ( rc )
{
printk("Failed to load Dom0 kernel\n");
return rc;
}
rc = pvh_setup_cpus(d, entry, start_info);
if ( rc )
{
printk("Failed to setup Dom0 CPUs: %d\n", rc);
return rc;
}
rc = pvh_setup_acpi(d, start_info);
if ( rc )
{
printk("Failed to setup Dom0 ACPI tables: %d\n", rc);
return rc;
}
panic("Building a PVHv2 Dom0 is not yet supported.");
return 0;
}
static int __init pvh_setup_acpi_xsdt(struct domain *d, paddr_t madt_addr,
paddr_t *addr)
{
struct acpi_table_xsdt *xsdt;
struct acpi_table_header *table;
struct acpi_table_rsdp *rsdp;
unsigned long size = sizeof(*xsdt);
unsigned int i, j, num_tables = 0;
paddr_t xsdt_paddr;
int rc;
/*
* Restore original DMAR table signature, we are going to filter it from
* the new XSDT that is presented to the guest, so it is no longer
* necessary to have it's signature zapped.
*/
acpi_dmar_reinstate();
/* Count the number of tables that will be added to the XSDT. */
for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
{
const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
if ( pvh_acpi_table_allowed(sig) )
num_tables++;
}
/*
* No need to add or subtract anything because struct acpi_table_xsdt
* includes one array slot already, and we have filtered out the original
* MADT and we are going to add a custom built MADT.
*/
size += num_tables * sizeof(xsdt->table_offset_entry[0]);
xsdt = xzalloc_bytes(size);
if ( !xsdt )
{
printk("Unable to allocate memory for XSDT table\n");
rc = -ENOMEM;
goto out;
}
/* Copy the native XSDT table header. */
rsdp = acpi_os_map_memory(acpi_os_get_root_pointer(), sizeof(*rsdp));
if ( !rsdp )
{
printk("Unable to map RSDP\n");
rc = -EINVAL;
goto out;
}
xsdt_paddr = rsdp->xsdt_physical_address;
acpi_os_unmap_memory(rsdp, sizeof(*rsdp));
table = acpi_os_map_memory(xsdt_paddr, sizeof(*table));
if ( !table )
{
printk("Unable to map XSDT\n");
rc = -EINVAL;
goto out;
}
xsdt->header = *table;
acpi_os_unmap_memory(table, sizeof(*table));
/* Add the custom MADT. */
xsdt->table_offset_entry[0] = madt_addr;
/* Copy the addresses of the rest of the allowed tables. */
for( i = 0, j = 1; i < acpi_gbl_root_table_list.count; i++ )
{
const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
if ( pvh_acpi_table_allowed(sig) )
xsdt->table_offset_entry[j++] =
acpi_gbl_root_table_list.tables[i].address;
}
xsdt->header.revision = 1;
xsdt->header.length = size;
/*
* Calling acpi_tb_checksum here is a layering violation, but
* introducing a wrapper for such simple usage seems overkill.
*/
xsdt->header.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, xsdt), size);
/* Place the new XSDT in guest memory space. */
if ( pvh_steal_ram(d, size, 0, GB(4), addr) )
{
printk("Unable to find guest RAM for XSDT\n");
rc = -ENOMEM;
goto out;
}
/* Mark this region as E820_ACPI. */
if ( pvh_add_mem_range(d, *addr, *addr + size, E820_ACPI) )
printk("Unable to add XSDT region to memory map\n");
rc = hvm_copy_to_guest_phys(*addr, xsdt, size, d->vcpu[0]);
if ( rc )
{
printk("Unable to copy XSDT into guest memory\n");
goto out;
}
rc = 0;
out:
xfree(xsdt);
return rc;
}
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);
}
acpi_status acpi_find_root_pointer(acpi_size *table_address)
{
u8 *table_ptr;
u8 *mem_rover;
u32 physical_address;
ACPI_FUNCTION_TRACE(acpi_find_root_pointer);
/* 1a) Get the location of the Extended BIOS Data Area (EBDA) */
table_ptr = acpi_os_map_memory((acpi_physical_address)
ACPI_EBDA_PTR_LOCATION,
ACPI_EBDA_PTR_LENGTH);
if (!table_ptr) {
ACPI_ERROR((AE_INFO,
"Could not map memory at 0x%8.8X for length %u",
ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
return_ACPI_STATUS(AE_NO_MEMORY);
}
ACPI_MOVE_16_TO_32(&physical_address, table_ptr);
/* Convert segment part to physical address */
physical_address <<= 4;
acpi_os_unmap_memory(table_ptr, ACPI_EBDA_PTR_LENGTH);
/* EBDA present? */
if (physical_address > 0x400) {
/*
* 1b) Search EBDA paragraphs (EBDA is required to be a
* minimum of 1K length)
*/
table_ptr = acpi_os_map_memory((acpi_physical_address)
physical_address,
ACPI_EBDA_WINDOW_SIZE);
if (!table_ptr) {
ACPI_ERROR((AE_INFO,
"Could not map memory at 0x%8.8X for length %u",
physical_address, ACPI_EBDA_WINDOW_SIZE));
return_ACPI_STATUS(AE_NO_MEMORY);
}
mem_rover =
acpi_tb_scan_memory_for_rsdp(table_ptr,
ACPI_EBDA_WINDOW_SIZE);
acpi_os_unmap_memory(table_ptr, ACPI_EBDA_WINDOW_SIZE);
if (mem_rover) {
/* Return the physical address */
physical_address +=
(u32) ACPI_PTR_DIFF(mem_rover, table_ptr);
*table_address = physical_address;
return_ACPI_STATUS(AE_OK);
}
}
/*
* 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
*/
table_ptr = acpi_os_map_memory((acpi_physical_address)
ACPI_HI_RSDP_WINDOW_BASE,
ACPI_HI_RSDP_WINDOW_SIZE);
if (!table_ptr) {
ACPI_ERROR((AE_INFO,
"Could not map memory at 0x%8.8X for length %u",
ACPI_HI_RSDP_WINDOW_BASE,
ACPI_HI_RSDP_WINDOW_SIZE));
return_ACPI_STATUS(AE_NO_MEMORY);
}
mem_rover =
acpi_tb_scan_memory_for_rsdp(table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
acpi_os_unmap_memory(table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Return the physical address */
physical_address = (u32)
(ACPI_HI_RSDP_WINDOW_BASE +
ACPI_PTR_DIFF(mem_rover, table_ptr));
*table_address = physical_address;
return_ACPI_STATUS(AE_OK);
}
/* A valid RSDP was not found */
ACPI_BIOS_ERROR((AE_INFO, "A valid RSDP was not found"));
return_ACPI_STATUS(AE_NOT_FOUND);
}
/*******************************************************************************
*
* 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);
}
acpi_status
acpi_tb_find_rsdp (
struct acpi_table_desc *table_info,
u32 flags)
{
u8 *table_ptr;
u8 *mem_rover;
u64 phys_addr;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE ("tb_find_rsdp");
/*
* Scan supports either 1) Logical addressing or 2) Physical addressing
*/
if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
/*
* 1) Search EBDA (low memory) paragraphs
*/
status = acpi_os_map_memory ((u64) ACPI_LO_RSDP_WINDOW_BASE, ACPI_LO_RSDP_WINDOW_SIZE,
(void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not map memory at %X for length %X\n",
ACPI_LO_RSDP_WINDOW_BASE, ACPI_LO_RSDP_WINDOW_SIZE));
return_ACPI_STATUS (status);
}
mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_LO_RSDP_WINDOW_SIZE);
acpi_os_unmap_memory (table_ptr, ACPI_LO_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
phys_addr = ACPI_LO_RSDP_WINDOW_BASE;
phys_addr += ACPI_PTR_DIFF (mem_rover,table_ptr);
table_info->physical_address = phys_addr;
return_ACPI_STATUS (AE_OK);
}
/*
* 2) Search upper memory: 16-byte boundaries in E0000h-F0000h
*/
status = acpi_os_map_memory ((u64) ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE,
(void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not map memory at %X for length %X\n",
ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
return_ACPI_STATUS (status);
}
mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
acpi_os_unmap_memory (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
phys_addr = ACPI_HI_RSDP_WINDOW_BASE;
phys_addr += ACPI_PTR_DIFF (mem_rover, table_ptr);
table_info->physical_address = phys_addr;
return_ACPI_STATUS (AE_OK);
}
}
/*
* Physical addressing
*/
else {
/*
* 1) Search EBDA (low memory) paragraphs
*/
mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (ACPI_LO_RSDP_WINDOW_BASE),
ACPI_LO_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
return_ACPI_STATUS (AE_OK);
}
/*
* 2) Search upper memory: 16-byte boundaries in E0000h-F0000h
*/
mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (ACPI_HI_RSDP_WINDOW_BASE),
ACPI_HI_RSDP_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
return_ACPI_STATUS (AE_OK);
}
}
/* RSDP signature was not found */
return_ACPI_STATUS (AE_NOT_FOUND);
}
acpi_status
acpi_get_firmware_table (
acpi_string signature,
u32 instance,
u32 flags,
struct acpi_table_header **table_pointer)
{
struct acpi_pointer rsdp_address;
struct acpi_pointer address;
acpi_status status;
struct acpi_table_header header;
struct acpi_table_desc table_info;
struct acpi_table_desc rsdt_info;
u32 table_count;
u32 i;
u32 j;
ACPI_FUNCTION_TRACE ("acpi_get_firmware_table");
/*
* Ensure that at least the table manager is initialized. We don't
* require that the entire ACPI subsystem is up for this interface
*/
/*
* If we have a buffer, we must have a length too
*/
if ((instance == 0) ||
(!signature) ||
(!table_pointer)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
rsdt_info.pointer = NULL;
if (!acpi_gbl_RSDP) {
/* Get the RSDP */
status = acpi_os_get_root_pointer (flags, &rsdp_address);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP not found\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Map and validate the RSDP */
if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
status = acpi_os_map_memory (rsdp_address.pointer.physical, sizeof (struct rsdp_descriptor),
(void *) &acpi_gbl_RSDP);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
else {
acpi_gbl_RSDP = rsdp_address.pointer.logical;
}
/*
* The signature and checksum must both be correct
*/
if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
/* Nope, BAD Signature */
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
if (acpi_tb_checksum (acpi_gbl_RSDP, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
/* Nope, BAD Checksum */
return_ACPI_STATUS (AE_BAD_CHECKSUM);
}
}
/* Get the RSDT and validate it */
acpi_tb_get_rsdt_address (&address);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
acpi_gbl_RSDP,
ACPI_HIDWORD (address.pointer.value),
ACPI_LODWORD (address.pointer.value)));
/* Insert processor_mode flags */
address.pointer_type |= flags;
status = acpi_tb_get_table (&address, &rsdt_info);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_tb_validate_rsdt (rsdt_info.pointer);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/* Get the number of table pointers within the RSDT */
table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, rsdt_info.pointer);
address.pointer_type = acpi_gbl_table_flags | flags;
/*
* Search the RSDT/XSDT for the correct instance of the
* requested table
*/
for (i = 0, j = 0; i < table_count; i++) {
/* Get the next table pointer, handle RSDT vs. XSDT */
if (acpi_gbl_RSDP->revision < 2) {
address.pointer.value = ((RSDT_DESCRIPTOR *) rsdt_info.pointer)->table_offset_entry[i];
}
else {
address.pointer.value =
((XSDT_DESCRIPTOR *) rsdt_info.pointer)->table_offset_entry[i];
}
/* Get the table header */
status = acpi_tb_get_table_header (&address, &header);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/* Compare table signatures and table instance */
if (!ACPI_STRNCMP (header.signature, signature, ACPI_NAME_SIZE)) {
/* An instance of the table was found */
j++;
if (j >= instance) {
/* Found the correct instance, get the entire table */
status = acpi_tb_get_table_body (&address, &header, &table_info);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
*table_pointer = table_info.pointer;
goto cleanup;
}
}
}
/* Did not find the table */
status = AE_NOT_EXIST;
cleanup:
acpi_os_unmap_memory (rsdt_info.pointer, (acpi_size) rsdt_info.pointer->length);
return_ACPI_STATUS (status);
}
static int __init extlog_init(void)
{
struct extlog_l1_head *l1_head;
void __iomem *extlog_l1_hdr;
size_t l1_hdr_size;
struct resource *r;
u64 cap;
int rc;
rc = -ENODEV;
rdmsrl(MSR_IA32_MCG_CAP, cap);
if (!(cap & MCG_ELOG_P))
return rc;
if (!extlog_get_l1addr())
return rc;
rc = -EINVAL;
/* get L1 header to fetch necessary information */
l1_hdr_size = sizeof(struct extlog_l1_head);
r = request_mem_region(l1_dirbase, l1_hdr_size, "L1 DIR HDR");
if (!r) {
pr_warn(FW_BUG EMCA_BUG,
(unsigned long long)l1_dirbase,
(unsigned long long)l1_dirbase + l1_hdr_size);
goto err;
}
extlog_l1_hdr = acpi_os_map_memory(l1_dirbase, l1_hdr_size);
l1_head = (struct extlog_l1_head *)extlog_l1_hdr;
l1_size = l1_head->total_len;
l1_percpu_entry = l1_head->entries;
elog_base = l1_head->elog_base;
elog_size = l1_head->elog_len;
acpi_os_unmap_memory(extlog_l1_hdr, l1_hdr_size);
release_mem_region(l1_dirbase, l1_hdr_size);
/* remap L1 header again based on completed information */
r = request_mem_region(l1_dirbase, l1_size, "L1 Table");
if (!r) {
pr_warn(FW_BUG EMCA_BUG,
(unsigned long long)l1_dirbase,
(unsigned long long)l1_dirbase + l1_size);
goto err;
}
extlog_l1_addr = acpi_os_map_memory(l1_dirbase, l1_size);
l1_entry_base = (u64 *)((u8 *)extlog_l1_addr + l1_hdr_size);
/* remap elog table */
r = request_mem_region(elog_base, elog_size, "Elog Table");
if (!r) {
pr_warn(FW_BUG EMCA_BUG,
(unsigned long long)elog_base,
(unsigned long long)elog_base + elog_size);
goto err_release_l1_dir;
}
elog_addr = acpi_os_map_memory(elog_base, elog_size);
rc = -ENOMEM;
/* allocate buffer to save elog record */
elog_buf = kmalloc(ELOG_ENTRY_LEN, GFP_KERNEL);
if (elog_buf == NULL)
goto err_release_elog;
mce_register_decode_chain(&extlog_mce_dec);
/* enable OS to be involved to take over management from BIOS */
((struct extlog_l1_head *)extlog_l1_addr)->flags |= FLAG_OS_OPTIN;
return 0;
err_release_elog:
if (elog_addr)
acpi_os_unmap_memory(elog_addr, elog_size);
release_mem_region(elog_base, elog_size);
err_release_l1_dir:
if (extlog_l1_addr)
acpi_os_unmap_memory(extlog_l1_addr, l1_size);
release_mem_region(l1_dirbase, l1_size);
err:
pr_warn(FW_BUG "Extended error log disabled because of problems parsing f/w tables\n");
return rc;
}
