ACPICA: Split out PM1 status registers from the FADT
Add new globals for the PM1 status registers (A/B), similar to the
way the PM1 enable registers are handled. Instead of overloading
the FADT Event Register blocks. This makes the code clearer and
less prone to error.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index 4b683ccd..a8191ef 100644
--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -57,6 +57,8 @@
static void acpi_tb_validate_fadt(void);
+static void acpi_tb_setup_fadt_registers(void);
+
/* Table for conversion of FADT to common internal format and FADT validation */
typedef struct acpi_fadt_info {
@@ -132,6 +134,35 @@
#define ACPI_FADT_INFO_ENTRIES (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
+/* Table used to split Event Blocks into separate status/enable registers */
+
+typedef struct acpi_fadt_pm_info {
+ struct acpi_generic_address *target;
+ u8 source;
+ u8 register_num;
+
+} acpi_fadt_pm_info;
+
+static struct acpi_fadt_pm_info fadt_pm_info_table[] = {
+ {&acpi_gbl_xpm1a_status,
+ ACPI_FADT_OFFSET(xpm1a_event_block),
+ 0},
+
+ {&acpi_gbl_xpm1a_enable,
+ ACPI_FADT_OFFSET(xpm1a_event_block),
+ 1},
+
+ {&acpi_gbl_xpm1b_status,
+ ACPI_FADT_OFFSET(xpm1b_event_block),
+ 0},
+
+ {&acpi_gbl_xpm1b_enable,
+ ACPI_FADT_OFFSET(xpm1b_event_block),
+ 1}
+};
+
+#define ACPI_FADT_PM_INFO_ENTRIES (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info))
+
/*******************************************************************************
*
* FUNCTION: acpi_tb_init_generic_address
@@ -207,7 +238,7 @@
*/
(void)acpi_tb_verify_checksum(table, length);
- /* Obtain a local copy of the FADT in common ACPI 2.0+ format */
+ /* Create a local copy of the FADT in common ACPI 2.0+ format */
acpi_tb_create_local_fadt(table, length);
@@ -265,11 +296,17 @@
ACPI_MEMCPY(&acpi_gbl_FADT, table,
ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
- /*
- * 1) Convert the local copy of the FADT to the common internal format
- * 2) Validate some of the important values within the FADT
- */
+ /* Convert the local copy of the FADT to the common internal format */
+
acpi_tb_convert_fadt();
+
+ /* Validate FADT values now, before we make any changes */
+
+ acpi_tb_validate_fadt();
+
+ /* Initialize the global ACPI register structures */
+
+ acpi_tb_setup_fadt_registers();
}
/*******************************************************************************
@@ -303,8 +340,6 @@
static void acpi_tb_convert_fadt(void)
{
- u8 pm1_register_bit_width;
- u8 pm1_register_byte_width;
struct acpi_generic_address *target64;
u32 i;
@@ -379,112 +414,6 @@
address32));
}
}
-
- /* Validate FADT values now, before we make any changes */
-
- acpi_tb_validate_fadt();
-
- /*
- * Optionally check all register lengths against the default values and
- * update them if they are incorrect.
- */
- if (acpi_gbl_use_default_register_widths) {
- for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
- target64 =
- ACPI_ADD_PTR(struct acpi_generic_address,
- &acpi_gbl_FADT,
- fadt_info_table[i].address64);
-
- /*
- * If a valid register (Address != 0) and the (default_length > 0)
- * (Not a GPE register), then check the width against the default.
- */
- if ((target64->address) &&
- (fadt_info_table[i].default_length > 0) &&
- (fadt_info_table[i].default_length !=
- target64->bit_width)) {
- ACPI_WARNING((AE_INFO,
- "Invalid length for %s: %d, using default %d",
- fadt_info_table[i].name,
- target64->bit_width,
- fadt_info_table[i].
- default_length));
-
- /* Incorrect size, set width to the default */
-
- target64->bit_width =
- fadt_info_table[i].default_length;
- }
- }
- }
-
- /*
- * Get the length of the individual PM1 registers (enable and status).
- * Each register is defined to be (event block length / 2).
- */
- pm1_register_bit_width =
- (u8)ACPI_DIV_2(acpi_gbl_FADT.xpm1a_event_block.bit_width);
- pm1_register_byte_width = (u8)ACPI_DIV_8(pm1_register_bit_width);
-
- /*
- * Adjust the lengths of the PM1 Event Blocks so that they can be used to
- * access the PM1 status register(s). Use (width / 2)
- */
- acpi_gbl_FADT.xpm1a_event_block.bit_width = pm1_register_bit_width;
- acpi_gbl_FADT.xpm1b_event_block.bit_width = pm1_register_bit_width;
-
- /*
- * Calculate separate GAS structs for the PM1 Enable registers.
- * These addresses do not appear (directly) in the FADT, so it is
- * useful to calculate them once, here.
- *
- * The PM event blocks are split into two register blocks, first is the
- * PM Status Register block, followed immediately by the PM Enable
- * Register block. Each is of length (xpm1x_event_block.bit_width/2).
- *
- * On various systems the v2 fields (and particularly the bit widths)
- * cannot be relied upon, though. Hence resort to using the v1 length
- * here (and warn about the inconsistency).
- */
- if (acpi_gbl_FADT.xpm1a_event_block.bit_width
- != acpi_gbl_FADT.pm1_event_length * 8)
- printk(KERN_WARNING "FADT: "
- "X_PM1a_EVT_BLK.bit_width (%u) does not match"
- " PM1_EVT_LEN (%u)\n",
- acpi_gbl_FADT.xpm1a_event_block.bit_width,
- acpi_gbl_FADT.pm1_event_length);
-
- /* The PM1A register block is required */
-
- acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
- acpi_gbl_FADT.xpm1a_event_block.space_id,
- pm1_register_byte_width,
- (acpi_gbl_FADT.xpm1a_event_block.address +
- pm1_register_byte_width));
- /* Don't forget to copy space_id of the GAS */
- acpi_gbl_xpm1a_enable.space_id =
- acpi_gbl_FADT.xpm1a_event_block.space_id;
-
- /* The PM1B register block is optional, ignore if not present */
-
- if (acpi_gbl_FADT.xpm1b_event_block.address) {
- if (acpi_gbl_FADT.xpm1b_event_block.bit_width
- != acpi_gbl_FADT.pm1_event_length * 8)
- printk(KERN_WARNING "FADT: "
- "X_PM1b_EVT_BLK.bit_width (%u) does not match"
- " PM1_EVT_LEN (%u)\n",
- acpi_gbl_FADT.xpm1b_event_block.bit_width,
- acpi_gbl_FADT.pm1_event_length);
- acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
- acpi_gbl_FADT.xpm1b_event_block.space_id,
- pm1_register_byte_width,
- (acpi_gbl_FADT.xpm1b_event_block.
- address + pm1_register_byte_width));
- /* Don't forget to copy space_id of the GAS */
- acpi_gbl_xpm1b_enable.space_id =
- acpi_gbl_FADT.xpm1b_event_block.space_id;
-
- }
}
/******************************************************************************
@@ -607,3 +536,94 @@
}
}
}
+
+/******************************************************************************
+ *
+ * FUNCTION: acpi_tb_setup_fadt_registers
+ *
+ * PARAMETERS: None, uses acpi_gbl_FADT.
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
+ * force FADT register definitions to their default lengths.
+ *
+ ******************************************************************************/
+
+static void acpi_tb_setup_fadt_registers(void)
+{
+ struct acpi_generic_address *target64;
+ struct acpi_generic_address *source64;
+ u8 pm1_register_byte_width;
+ u32 i;
+
+ /*
+ * Optionally check all register lengths against the default values and
+ * update them if they are incorrect.
+ */
+ if (acpi_gbl_use_default_register_widths) {
+ for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
+ target64 =
+ ACPI_ADD_PTR(struct acpi_generic_address,
+ &acpi_gbl_FADT,
+ fadt_info_table[i].address64);
+
+ /*
+ * If a valid register (Address != 0) and the (default_length > 0)
+ * (Not a GPE register), then check the width against the default.
+ */
+ if ((target64->address) &&
+ (fadt_info_table[i].default_length > 0) &&
+ (fadt_info_table[i].default_length !=
+ target64->bit_width)) {
+ ACPI_WARNING((AE_INFO,
+ "Invalid length for %s: %d, using default %d",
+ fadt_info_table[i].name,
+ target64->bit_width,
+ fadt_info_table[i].
+ default_length));
+
+ /* Incorrect size, set width to the default */
+
+ target64->bit_width =
+ fadt_info_table[i].default_length;
+ }
+ }
+ }
+
+ /*
+ * Get the length of the individual PM1 registers (enable and status).
+ * Each register is defined to be (event block length / 2). Extra divide
+ * by 8 converts bits to bytes.
+ */
+ pm1_register_byte_width =
+ (u8)ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width);
+
+ /*
+ * Calculate separate GAS structs for the PM1x (A/B) Status and Enable
+ * registers. These addresses do not appear (directly) in the FADT, so it
+ * is useful to pre-calculate them from the PM1 Event Block definitions.
+ *
+ * The PM event blocks are split into two register blocks, first is the
+ * PM Status Register block, followed immediately by the PM Enable
+ * Register block. Each is of length (pm1_event_length/2)
+ *
+ * Note: The PM1A event block is required by the ACPI specification.
+ * However, the PM1B event block is optional and is rarely, if ever,
+ * used.
+ */
+
+ for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) {
+ source64 =
+ ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
+ fadt_pm_info_table[i].source);
+
+ acpi_tb_init_generic_address(fadt_pm_info_table[i].target,
+ source64->space_id,
+ pm1_register_byte_width,
+ source64->address +
+ (fadt_pm_info_table[i].
+ register_num *
+ pm1_register_byte_width));
+ }
+}