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path: root/drivers/acpi/tables/tbxfroot.c
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Diffstat (limited to 'drivers/acpi/tables/tbxfroot.c')
-rw-r--r--drivers/acpi/tables/tbxfroot.c123
1 files changed, 78 insertions, 45 deletions
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
index 6e8072ebbac..dc3c3f6a9f6 100644
--- a/drivers/acpi/tables/tbxfroot.c
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -50,6 +50,18 @@
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbxfroot")
+/* Local prototypes */
+
+static acpi_status
+acpi_tb_find_rsdp (
+ struct acpi_table_desc *table_info,
+ u32 flags);
+
+static u8 *
+acpi_tb_scan_memory_for_rsdp (
+ u8 *start_address,
+ u32 length);
+
/*******************************************************************************
*
@@ -57,7 +69,8 @@
*
* PARAMETERS: Signature - String with ACPI table signature
* oem_id - String with the table OEM ID
- * oem_table_id - String with the OEM Table ID.
+ * oem_table_id - String with the OEM Table ID
+ * table_ptr - Where the table pointer is returned
*
* RETURN: Status
*
@@ -99,14 +112,13 @@ acpi_tb_find_table (
if (!acpi_gbl_DSDT) {
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
-
table = acpi_gbl_DSDT;
}
else {
/* Find the table */
status = acpi_get_firmware_table (signature, 1,
- ACPI_LOGICAL_ADDRESSING, &table);
+ ACPI_LOGICAL_ADDRESSING, &table);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
@@ -114,14 +126,19 @@ acpi_tb_find_table (
/* Check oem_id and oem_table_id */
- if ((oem_id[0] && ACPI_STRNCMP (
- oem_id, table->oem_id, sizeof (table->oem_id))) ||
+ if ((oem_id[0] && ACPI_STRNCMP (
+ oem_id, table->oem_id,
+ sizeof (table->oem_id))) ||
+
(oem_table_id[0] && ACPI_STRNCMP (
- oem_table_id, table->oem_table_id, sizeof (table->oem_table_id)))) {
+ oem_table_id, table->oem_table_id,
+ sizeof (table->oem_table_id)))) {
return_ACPI_STATUS (AE_AML_NAME_NOT_FOUND);
}
- ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n", table->signature));
+ ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
+ table->signature));
+
*table_ptr = table;
return_ACPI_STATUS (AE_OK);
}
@@ -191,8 +208,8 @@ acpi_get_firmware_table (
/* 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);
+ status = acpi_os_map_memory (address.pointer.physical,
+ sizeof (struct rsdp_descriptor), (void *) &acpi_gbl_RSDP);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
@@ -203,7 +220,8 @@ acpi_get_firmware_table (
/* The signature and checksum must both be correct */
- if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+ if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG,
+ sizeof (RSDP_SIG)-1) != 0) {
/* Nope, BAD Signature */
return_ACPI_STATUS (AE_BAD_SIGNATURE);
@@ -313,7 +331,8 @@ acpi_get_firmware_table (
cleanup:
- acpi_os_unmap_memory (rsdt_info->pointer, (acpi_size) rsdt_info->pointer->length);
+ acpi_os_unmap_memory (rsdt_info->pointer,
+ (acpi_size) rsdt_info->pointer->length);
ACPI_MEM_FREE (rsdt_info);
if (header) {
@@ -335,8 +354,8 @@ EXPORT_SYMBOL(acpi_get_firmware_table);
*
* FUNCTION: acpi_find_root_pointer
*
- * PARAMETERS: **rsdp_address - Where to place the RSDP address
- * Flags - Logical/Physical addressing
+ * PARAMETERS: Flags - Logical/Physical addressing
+ * rsdp_address - Where to place the RSDP address
*
* RETURN: Status, Physical address of the RSDP
*
@@ -363,6 +382,7 @@ acpi_find_root_pointer (
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"RSDP structure not found, %s Flags=%X\n",
acpi_format_exception (status), flags));
+
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
@@ -385,7 +405,7 @@ acpi_find_root_pointer (
*
******************************************************************************/
-u8 *
+static u8 *
acpi_tb_scan_memory_for_rsdp (
u8 *start_address,
u32 length)
@@ -406,7 +426,8 @@ acpi_tb_scan_memory_for_rsdp (
mem_rover += ACPI_RSDP_SCAN_STEP) {
/* The signature and checksum must both be correct */
- if (ACPI_STRNCMP ((char *) mem_rover, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+ if (ACPI_STRNCMP ((char *) mem_rover,
+ RSDP_SIG, sizeof (RSDP_SIG) - 1) != 0) {
/* No signature match, keep looking */
continue;
@@ -450,7 +471,7 @@ acpi_tb_scan_memory_for_rsdp (
*
* FUNCTION: acpi_tb_find_rsdp
*
- * PARAMETERS: *table_info - Where the table info is returned
+ * PARAMETERS: table_info - Where the table info is returned
* Flags - Current memory mode (logical vs.
* physical addressing)
*
@@ -468,7 +489,7 @@ acpi_tb_scan_memory_for_rsdp (
*
******************************************************************************/
-acpi_status
+static acpi_status
acpi_tb_find_rsdp (
struct acpi_table_desc *table_info,
u32 flags)
@@ -483,43 +504,49 @@ acpi_tb_find_rsdp (
/*
- * Scan supports either 1) Logical addressing or 2) Physical addressing
+ * Scan supports either logical addressing or physical addressing
*/
if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
- /*
- * 1a) Get the location of the EBDA
- */
- status = acpi_os_map_memory ((acpi_physical_address) ACPI_EBDA_PTR_LOCATION,
- ACPI_EBDA_PTR_LENGTH,
- (void *) &table_ptr);
+ /* 1a) Get the location of the Extended BIOS Data Area (EBDA) */
+
+ status = acpi_os_map_memory (
+ (acpi_physical_address) ACPI_EBDA_PTR_LOCATION,
+ ACPI_EBDA_PTR_LENGTH, (void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not map memory at %8.8X for length %X\n",
ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
+
return_ACPI_STATUS (status);
}
ACPI_MOVE_16_TO_32 (&physical_address, table_ptr);
- physical_address <<= 4; /* Convert segment to physical address */
+
+ /* 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 1_k length)
+ * 1b) Search EBDA paragraphs (EBDa is required to be a
+ * minimum of 1_k length)
*/
- status = acpi_os_map_memory ((acpi_physical_address) physical_address,
- ACPI_EBDA_WINDOW_SIZE,
- (void *) &table_ptr);
+ status = acpi_os_map_memory (
+ (acpi_physical_address) physical_address,
+ ACPI_EBDA_WINDOW_SIZE, (void *) &table_ptr);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not map memory at %8.8X for length %X\n",
physical_address, ACPI_EBDA_WINDOW_SIZE));
+
return_ACPI_STATUS (status);
}
- mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_EBDA_WINDOW_SIZE);
+ 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) {
@@ -527,7 +554,8 @@ acpi_tb_find_rsdp (
physical_address += ACPI_PTR_DIFF (mem_rover, table_ptr);
- table_info->physical_address = (acpi_physical_address) physical_address;
+ table_info->physical_address =
+ (acpi_physical_address) physical_address;
return_ACPI_STATUS (AE_OK);
}
}
@@ -535,13 +563,15 @@ acpi_tb_find_rsdp (
/*
* 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
*/
- status = acpi_os_map_memory ((acpi_physical_address) ACPI_HI_RSDP_WINDOW_BASE,
- ACPI_HI_RSDP_WINDOW_SIZE,
- (void *) &table_ptr);
+ status = acpi_os_map_memory (
+ (acpi_physical_address) 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 %8.8X for length %X\n",
ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
+
return_ACPI_STATUS (status);
}
@@ -551,9 +581,11 @@ acpi_tb_find_rsdp (
if (mem_rover) {
/* Found it, return the physical address */
- physical_address = ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr);
+ physical_address =
+ ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr);
- table_info->physical_address = (acpi_physical_address) physical_address;
+ table_info->physical_address =
+ (acpi_physical_address) physical_address;
return_ACPI_STATUS (AE_OK);
}
}
@@ -562,9 +594,8 @@ acpi_tb_find_rsdp (
* Physical addressing
*/
else {
- /*
- * 1a) Get the location of the EBDA
- */
+ /* 1a) Get the location of the EBDA */
+
ACPI_MOVE_16_TO_32 (&physical_address, ACPI_EBDA_PTR_LOCATION);
physical_address <<= 4; /* Convert segment to physical address */
@@ -572,9 +603,11 @@ acpi_tb_find_rsdp (
if (physical_address > 0x400) {
/*
- * 1b) Search EBDA paragraphs (EBDa is required to be a minimum of 1_k length)
+ * 1b) Search EBDA paragraphs (EBDa is required to be a minimum of
+ * 1_k length)
*/
- mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (physical_address),
+ mem_rover = acpi_tb_scan_memory_for_rsdp (
+ ACPI_PHYSADDR_TO_PTR (physical_address),
ACPI_EBDA_WINDOW_SIZE);
if (mem_rover) {
/* Found it, return the physical address */
@@ -584,10 +617,10 @@ acpi_tb_find_rsdp (
}
}
- /*
- * 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
- */
- mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (ACPI_HI_RSDP_WINDOW_BASE),
+ /* 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh */
+
+ 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 */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-08 16:05:29 +0000