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x86: acpi: Support generation of the HPET table

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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>
This commit is contained in:
Simon Glass
2020-09-22 12:45:09 -06:00
committed by Bin Meng
parent 6c0da2da7c
commit d2628984b7
3 changed files with 91 additions and 9 deletions
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31
include/acpi/acpi_table.h
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@@ -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 @@ struct __packed acpi_table_header {
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 @@ struct acpi_xsdt {
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 @@ enum acpi_address_space_size {
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;