/*******************************************************************************
*
* FUNCTION: acpi_load_tables
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: This function is called to load the ACPI tables from the
* provided RSDT
*
******************************************************************************/
acpi_status acpi_load_tables(void)
{
struct acpi_pointer rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_load_tables);
/* Get the RSDP */
status = acpi_os_get_root_pointer(ACPI_LOGICAL_ADDRESSING,
&rsdp_address);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Could not get the RSDP"));
goto error_exit;
}
/* Map and validate the RSDP */
acpi_gbl_table_flags = rsdp_address.pointer_type;
status = acpi_tb_verify_rsdp(&rsdp_address);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "During RSDP validation"));
goto error_exit;
}
/* Get the RSDT via the RSDP */
status = acpi_tb_get_table_rsdt();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Could not load RSDT"));
goto error_exit;
}
/* Now get the tables needed by this subsystem (FADT, DSDT, etc.) */
status = acpi_tb_get_required_tables();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not get all required tables (DSDT/FADT/FACS)"));
goto error_exit;
}
ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
/* Load the namespace from the tables */
status = acpi_ns_load_namespace();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Could not load namespace"));
goto error_exit;
}
return_ACPI_STATUS(AE_OK);
error_exit:
ACPI_EXCEPTION((AE_INFO, status, "Could not load tables"));
return_ACPI_STATUS(status);
}
acpi_status __init
acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
u32 initial_table_count, u8 allow_resize)
{
acpi_physical_address rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_initialize_tables);
/*
* Set up the Root Table Array
* Allocate the table array if requested
*/
if (!initial_table_array) {
/*
* ACPI code allows for much flexibility. Kitten doesn't need it
* that desperately.
*/
ACPI_ERROR((AE_INFO,
"Don't give me a NULL table for storing headers.\n"));
return_ACPI_STATUS(AE_BAD_PARAMETER);
} else {
/* Root Table Array has been statically allocated by the host */
ACPI_MEMSET(initial_table_array, 0,
(acpi_size) initial_table_count *
sizeof(struct acpi_table_desc));
acpi_gbl_root_table_list.tables = initial_table_array;
acpi_gbl_root_table_list.max_table_count = initial_table_count;
acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
if (allow_resize) {
acpi_gbl_root_table_list.flags |=
ACPI_ROOT_ALLOW_RESIZE;
}
}
/* Get the address of the RSDP */
rsdp_address = acpi_os_get_root_pointer();
if (!rsdp_address) {
ACPI_ERROR((AE_INFO, "Could not find RSDP\n"));
return_ACPI_STATUS(AE_NOT_FOUND);
}
/*
* Get the root table (RSDT or XSDT) and extract all entries to the local
* Root Table Array. This array contains the information of the RSDT/XSDT
* in a common, more useable format.
*/
status = acpi_tb_parse_root_table(rsdp_address);
return_ACPI_STATUS(status);
}
acpi_status __init
acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
u32 initial_table_count, u8 allow_resize)
{
acpi_physical_address rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_initialize_tables);
/*
* Set up the Root Table Array
* Allocate the table array if requested
*/
if (!initial_table_array) {
status = acpi_allocate_root_table(initial_table_count);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
/* Root Table Array has been statically allocated by the host */
ACPI_MEMSET(initial_table_array, 0,
(acpi_size) initial_table_count *
sizeof(struct acpi_table_desc));
acpi_gbl_root_table_list.tables = initial_table_array;
acpi_gbl_root_table_list.size = initial_table_count;
acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
if (allow_resize) {
acpi_gbl_root_table_list.flags |=
ACPI_ROOT_ALLOW_RESIZE;
}
}
/* Get the address of the RSDP */
rsdp_address = acpi_os_get_root_pointer();
if (!rsdp_address) {
return_ACPI_STATUS(AE_NOT_FOUND);
}
/*
* Get the root table (RSDT or XSDT) and extract all entries to the local
* Root Table Array. This array contains the information of the RSDT/XSDT
* in a common, more useable format.
*/
status =
acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED);
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_load_tables (void)
{
struct acpi_pointer rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_load_tables");
/* Get the RSDP */
status = acpi_os_get_root_pointer (ACPI_LOGICAL_ADDRESSING,
&rsdp_address);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Could not get RSDP, %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Map and validate the RSDP */
acpi_gbl_table_flags = rsdp_address.pointer_type;
status = acpi_tb_verify_rsdp (&rsdp_address);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: RSDP Failed validation: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Get the RSDT via the RSDP */
status = acpi_tb_get_table_rsdt ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Could not load RSDT: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Now get the tables needed by this subsystem (FADT, DSDT, etc.) */
status = acpi_tb_get_required_tables ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Error getting required tables (DSDT/FADT/FACS): %s\n",
acpi_format_exception (status)));
goto error_exit;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
/* Load the namespace from the tables */
status = acpi_ns_load_namespace ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Could not load namespace: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
return_ACPI_STATUS (AE_OK);
error_exit:
ACPI_REPORT_ERROR (("acpi_load_tables: Could not load tables: %s\n",
acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
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);
}
int __init get_memcfg_from_srat(void)
{
struct acpi_table_header *header = NULL;
struct acpi_table_rsdp *rsdp = NULL;
struct acpi_table_rsdt *rsdt = NULL;
acpi_native_uint rsdp_address = 0;
struct acpi_static_rsdt saved_rsdt;
int tables = 0;
int i = 0;
rsdp_address = acpi_os_get_root_pointer();
if (!rsdp_address) {
printk("%s: System description tables not found\n",
__func__);
goto out_err;
}
printk("%s: assigning address to rsdp\n", __func__);
rsdp = (struct acpi_table_rsdp *)(u32)rsdp_address;
if (!rsdp) {
printk("%s: Didn't find ACPI root!\n", __func__);
goto out_err;
}
printk(KERN_INFO "%.8s v%d [%.6s]\n", rsdp->signature, rsdp->revision,
rsdp->oem_id);
if (strncmp(rsdp->signature, ACPI_SIG_RSDP,strlen(ACPI_SIG_RSDP))) {
printk(KERN_WARNING "%s: RSDP table signature incorrect\n", __func__);
goto out_err;
}
rsdt = (struct acpi_table_rsdt *)
early_ioremap(rsdp->rsdt_physical_address, sizeof(struct acpi_table_rsdt));
if (!rsdt) {
printk(KERN_WARNING
"%s: ACPI: Invalid root system description tables (RSDT)\n",
__func__);
goto out_err;
}
header = &rsdt->header;
if (strncmp(header->signature, ACPI_SIG_RSDT, strlen(ACPI_SIG_RSDT))) {
printk(KERN_WARNING "ACPI: RSDT signature incorrect\n");
goto out_err;
}
/*
* The number of tables is computed by taking the
* size of all entries (header size minus total
* size of RSDT) divided by the size of each entry
* (4-byte table pointers).
*/
tables = (header->length - sizeof(struct acpi_table_header)) / 4;
if (!tables)
goto out_err;
memcpy(&saved_rsdt, rsdt, sizeof(saved_rsdt));
if (saved_rsdt.table.header.length > sizeof(saved_rsdt)) {
printk(KERN_WARNING "ACPI: Too big length in RSDT: %d\n",
saved_rsdt.table.header.length);
goto out_err;
}
printk("Begin SRAT table scan....\n");
for (i = 0; i < tables; i++) {
/* Map in header, then map in full table length. */
header = (struct acpi_table_header *)
early_ioremap(saved_rsdt.table.table_offset_entry[i], sizeof(struct acpi_table_header));
if (!header)
break;
header = (struct acpi_table_header *)
early_ioremap(saved_rsdt.table.table_offset_entry[i], header->length);
if (!header)
break;
if (strncmp((char *) &header->signature, ACPI_SIG_SRAT, 4))
continue;
/* we've found the srat table. don't need to look at any more tables */
return acpi20_parse_srat((struct acpi_table_srat *)header);
}
out_err:
remove_all_active_ranges();
printk("failed to get NUMA memory information from SRAT table\n");
return 0;
}
acpi_status
acpi_get_firmware_table(acpi_string signature,
u32 instance,
u32 flags, struct acpi_table_header **table_pointer)
{
acpi_status status;
struct acpi_pointer address;
struct acpi_table_header *header = NULL;
struct acpi_table_desc *table_info = NULL;
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);
}
/* Ensure that we have a RSDP */
if (!acpi_gbl_RSDP) {
/* Get the RSDP */
status = acpi_os_get_root_pointer(flags, &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(address.pointer.physical,
sizeof(struct
rsdp_descriptor),
(void *)&acpi_gbl_RSDP);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
acpi_gbl_RSDP = address.pointer.logical;
}
/* The RDSP signature and checksum must both be correct */
status = acpi_tb_validate_rsdp(acpi_gbl_RSDP);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* Get the RSDT address via the RSDP */
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_FORMAT_UINT64(address.pointer.value)));
/* Insert processor_mode flags */
address.pointer_type |= flags;
/* Get and validate the RSDT */
rsdt_info = ACPI_MEM_CALLOCATE(sizeof(struct acpi_table_desc));
if (!rsdt_info) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
status = acpi_tb_get_table(&address, rsdt_info);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
status = acpi_tb_validate_rsdt(rsdt_info->pointer);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/* Allocate a scratch table header and table descriptor */
header = ACPI_MEM_ALLOCATE(sizeof(struct acpi_table_header));
if (!header) {
status = AE_NO_MEMORY;
goto cleanup;
}
table_info = ACPI_MEM_ALLOCATE(sizeof(struct acpi_table_desc));
if (!table_info) {
status = AE_NO_MEMORY;
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
* RSDT pointers are 32 bits, XSDT pointers are 64 bits
*/
if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
address.pointer.value =
(ACPI_CAST_PTR
(RSDT_DESCRIPTOR,
rsdt_info->pointer))->table_offset_entry[i];
} else {
address.pointer.value =
(ACPI_CAST_PTR
(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:
if (rsdt_info->pointer) {
acpi_os_unmap_memory(rsdt_info->pointer,
(acpi_size) rsdt_info->pointer->length);
}
ACPI_MEM_FREE(rsdt_info);
if (header) {
ACPI_MEM_FREE(header);
}
if (table_info) {
ACPI_MEM_FREE(table_info);
}
return_ACPI_STATUS(status);
}
acpi_status
acpi_load_tables (void)
{
ACPI_PHYSICAL_ADDRESS rsdp_physical_address;
acpi_status status;
u32 number_of_tables = 0;
FUNCTION_TRACE ("Acpi_load_tables");
/* Get the RSDP */
status = acpi_os_get_root_pointer (ACPI_LOGICAL_ADDRESSING,
&rsdp_physical_address);
if (ACPI_FAILURE (status)) {
REPORT_ERROR (("Acpi_load_tables: Could not get RSDP, %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Map and validate the RSDP */
status = acpi_tb_verify_rsdp (rsdp_physical_address);
if (ACPI_FAILURE (status)) {
REPORT_ERROR (("Acpi_load_tables: RSDP Failed validation: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Get the RSDT via the RSDP */
status = acpi_tb_get_table_rsdt (&number_of_tables);
if (ACPI_FAILURE (status)) {
REPORT_ERROR (("Acpi_load_tables: Could not load RSDT: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Now get the rest of the tables */
status = acpi_tb_get_all_tables (number_of_tables, NULL);
if (ACPI_FAILURE (status)) {
REPORT_ERROR (("Acpi_load_tables: Error getting required tables (DSDT/FADT/FACS): %s\n",
acpi_format_exception (status)));
goto error_exit;
}
ACPI_DEBUG_PRINT ((ACPI_DB_OK, "ACPI Tables successfully loaded\n"));
/* Load the namespace from the tables */
status = acpi_ns_load_namespace ();
if (ACPI_FAILURE (status)) {
REPORT_ERROR (("Acpi_load_tables: Could not load namespace: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
return_ACPI_STATUS (AE_OK);
error_exit:
REPORT_ERROR (("Acpi_load_tables: Could not load tables: %s\n",
acpi_format_exception (status)));
return_ACPI_STATUS (status);
}