x86: acpi: Support generation of the HPET table
Add an implementation of the HPET (High Precision Event Timer) ACPI
table. Since this is x86-specific, put it in an x86-specific file
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h
index fe9b29f..f814044 100644
--- a/include/acpi/acpi_table.h
+++ b/include/acpi/acpi_table.h
@@ -20,6 +20,9 @@
#define OEM_TABLE_ID "U-BOOTBL" /* U-Boot Table */
#define ASLC_ID "INTL" /* Intel ASL Compiler */
+/* TODO(sjg@chromium.org): Figure out how to get compiler revision */
+#define ASL_REVISION 0
+
#define ACPI_RSDP_REV_ACPI_1_0 0
#define ACPI_RSDP_REV_ACPI_2_0 2
@@ -56,6 +59,15 @@
u32 aslc_revision; /* ASL compiler revision number */
};
+struct acpi_gen_regaddr {
+ u8 space_id; /* Address space ID */
+ u8 bit_width; /* Register size in bits */
+ u8 bit_offset; /* Register bit offset */
+ u8 access_size; /* Access size */
+ u32 addrl; /* Register address, low 32 bits */
+ u32 addrh; /* Register address, high 32 bits */
+};
+
/* A maximum number of 32 ACPI tables ought to be enough for now */
#define MAX_ACPI_TABLES 32
@@ -71,6 +83,16 @@
u64 entry[MAX_ACPI_TABLES];
};
+/* HPET timers */
+struct __packed acpi_hpet {
+ struct acpi_table_header header;
+ u32 id;
+ struct acpi_gen_regaddr addr;
+ u8 number;
+ u16 min_tick;
+ u8 attributes;
+};
+
/* FADT Preferred Power Management Profile */
enum acpi_pm_profile {
ACPI_PM_UNSPECIFIED = 0,
@@ -138,15 +160,6 @@
ACPI_ACCESS_SIZE_QWORD_ACCESS
};
-struct acpi_gen_regaddr {
- u8 space_id; /* Address space ID */
- u8 bit_width; /* Register size in bits */
- u8 bit_offset; /* Register bit offset */
- u8 access_size; /* Access size */
- u32 addrl; /* Register address, low 32 bits */
- u32 addrh; /* Register address, high 32 bits */
-};
-
/* FADT (Fixed ACPI Description Table) */
struct __packed acpi_fadt {
struct acpi_table_header header;