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Subject[PATCH 3/3] ACPI / ACPICA: Add GTDT support updated by ACPI 5.1
Date
With ACPI 5.0, we got per-processor timer support in GTDT,
and ACPI 5.1 introduced the support for platform (memory-mapped)
timers: GT Block and SBSA watchdog timer, add the code needed
for the spec change.

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
---
include/acpi/actbl3.h | 99 ++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 85 insertions(+), 14 deletions(-)

diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
index c2295cc..96c60cd 100644
--- a/include/acpi/actbl3.h
+++ b/include/acpi/actbl3.h
@@ -241,33 +241,104 @@ struct acpi_s3pt_suspend {

/*******************************************************************************
*
- * GTDT - Generic Timer Description Table (ACPI 5.0)
- * Version 1
+ * GTDT - Generic Timer Description Table (ACPI 5.1)
+ * Version 2
*
******************************************************************************/

struct acpi_table_gtdt {
struct acpi_table_header header; /* Common ACPI table header */
- u64 address;
- u32 flags;
- u32 secure_pl1_interrupt;
- u32 secure_pl1_flags;
- u32 non_secure_pl1_interrupt;
- u32 non_secure_pl1_flags;
+ u64 cnt_control_base_address;
+ u32 reserved;
+ u32 secure_el1_interrupt;
+ u32 secure_el1_flags;
+ u32 non_secure_el1_interrupt;
+ u32 non_secure_el1_flags;
u32 virtual_timer_interrupt;
u32 virtual_timer_flags;
- u32 non_secure_pl2_interrupt;
- u32 non_secure_pl2_flags;
+ u32 non_secure_el2_interrupt;
+ u32 non_secure_el2_flags;
+ u64 cnt_read_base_address;
+ u32 platform_timer_count;
+ u32 platform_timer_offset;
};

-/* Values for Flags field above */
-
-#define ACPI_GTDT_MAPPED_BLOCK_PRESENT 1
-
/* Values for all "TimerFlags" fields above */

#define ACPI_GTDT_INTERRUPT_MODE 1
#define ACPI_GTDT_INTERRUPT_POLARITY 2
+#define ACPI_GTDT_ALWAYS_ON 4
+
+/*
+ * GTDT Subtable header
+ */
+struct acpi_gtdt_header {
+ u8 type;
+ u16 length;
+};
+
+/* Values for GTDT subtable type for GTDT subtables above */
+
+enum acpi_gtdt_type {
+ ACPI_GTDT_TYPE_GT_BLOCK = 0, /* memory-mapped generic timer */
+ ACPI_GTDT_TYPE_SBSA_GENERIC_WATCHDOG = 1,
+ ACPI_GTDT_TYPE_RESERVED = 2 /* 2 and greater are reserved */
+};
+
+/*
+ * GTDT Subtables, correspond to Type in struct acpi_gtdt_header
+ */
+
+/* 0: Generic Timer Block */
+
+struct acpi_gtdt_gt_block {
+ struct acpi_gtdt_header header;
+ u8 reserved;
+ u64 gt_block_address;
+ u32 gt_block_timer_count; /* must be less than or equal to 8 */
+ u32 gt_block_timer_offset;
+};
+
+/* GT Block Timer Structure */
+
+struct acpi_gt_block_timer {
+ u8 gt_frame_number;
+ u8 reseved[3];
+ u64 cnt_base_address;
+ u64 cnt_el0_base_adress;
+ u32 physical_timer_interrupt;
+ u32 physical_timer_flags;
+ u32 vitual_timer_interrupt;
+ u32 vitual_timer_flags;
+ u32 timer_common_flags;
+};
+
+/* Flag Definitions: GT Block Physical Timers and Virtual timers */
+
+#define ACPI_GT_BLOCK_INTERRUPT_MODE 1
+#define ACPI_GT_BLOCK_INTERRUPT_POLARITY 2
+
+/* Flag Definitions: Common Flags */
+
+#define ACPI_GT_BLOCK_IS_SECURE_TIMER 1
+#define ACPI_GT_BLOCK_ALWAYS_ON 2
+
+/* 1: SBSA Generic Watchdog Structure */
+
+struct acpi_sbsa_generic_watchdog {
+ struct acpi_gtdt_header header;
+ u8 reserved;
+ u64 refresh_frame_address;
+ u64 control_frame_address;
+ u32 interrupt;
+ u32 flags;
+};
+
+/* Flag Definitions: SBSA Generic Watchdog */
+
+#define ACPI_SBSA_WATCHDOG_INTERRUPT_MODE 1
+#define ACPI_SBSA_WATCHDOG_INTERRUPT_POLARITY 2
+#define ACPI_SBSA_WATCHDOG_IS_SECURE_TIMER 4

/*******************************************************************************
*
--
1.7.9.5


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