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Message-id: <72a8887a356076dfa39bd6691c52446f90a50480.1333101989.git.len.brown@intel.com>
Date: Fri, 30 Mar 2012 06:13:35 -0400
From: Len Brown <lenb@...nel.org>
To: linux-acpi@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Cc: linux-kernel@...r.kernel.org, Bob Moore <robert.moore@...el.com>,
Lin Ming <ming.m.lin@...el.com>,
Len Brown <len.brown@...el.com>
Subject: [PATCH 32/76] ACPICA: Add table-driven dispatch for sleep/wake
functions
From: Bob Moore <robert.moore@...el.com>
Simplifies the code, especially the compile-time
ACPI_REDUCED_HARDWARE option.
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Lin Ming <ming.m.lin@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
drivers/acpi/acpica/acmacros.h | 6 ++
drivers/acpi/acpica/hwxfsleep.c | 136 +++++++++++++++++++++++----------------
include/acpi/actypes.h | 9 +++
3 files changed, 97 insertions(+), 54 deletions(-)
diff --git a/drivers/acpi/acpica/acmacros.h b/drivers/acpi/acpica/acmacros.h
index ef338a9..f119f47 100644
--- a/drivers/acpi/acpica/acmacros.h
+++ b/drivers/acpi/acpica/acmacros.h
@@ -516,6 +516,12 @@
#endif /* ACPI_DEBUG_OUTPUT */
+#if (!ACPI_REDUCED_HARDWARE)
+#define ACPI_HW_OPTIONAL_FUNCTION(addr) addr
+#else
+#define ACPI_HW_OPTIONAL_FUNCTION(addr) NULL
+#endif
+
/*
* Some code only gets executed when the debugger is built in.
* Note that this is entirely independent of whether the
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
index ff20558..b711f97 100644
--- a/drivers/acpi/acpica/hwxfsleep.c
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -48,6 +48,34 @@
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME("hwxfsleep")
+/* Local prototypes */
+static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id);
+
+/*
+ * Dispatch table used to efficiently branch to the various sleep
+ * functions.
+ */
+#define ACPI_SLEEP_FUNCTION 0
+#define ACPI_WAKE_PREP_FUNCTION 1
+#define ACPI_WAKE_FUNCTION 2
+
+/* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
+
+static struct acpi_sleep_functions acpi_sleep_dispatch[] = {
+ {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_sleep),
+ acpi_hw_extended_sleep},
+ {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake_prep),
+ acpi_hw_extended_wake_prep},
+ {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake), acpi_hw_extended_wake}
+};
+
+/*
+ * These functions are removed for the ACPI_REDUCED_HARDWARE case:
+ * acpi_set_firmware_waking_vector
+ * acpi_set_firmware_waking_vector64
+ * acpi_enter_sleep_state_s4bios
+ */
+
#if (!ACPI_REDUCED_HARDWARE)
/*******************************************************************************
*
@@ -61,6 +89,7 @@ ACPI_MODULE_NAME("hwxfsleep")
* DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
*
******************************************************************************/
+
acpi_status acpi_set_firmware_waking_vector(u32 physical_address)
{
ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
@@ -193,18 +222,65 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
#endif /* !ACPI_REDUCED_HARDWARE */
/*******************************************************************************
*
+ * FUNCTION: acpi_hw_sleep_dispatch
+ *
+ * PARAMETERS: sleep_state - Which sleep state to enter/exit
+ * function_id - Sleep, wake_prep, or Wake
+ *
+ * RETURN: Status from the invoked sleep handling function.
+ *
+ * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
+ * function.
+ *
+ ******************************************************************************/
+static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id)
+{
+ acpi_status status;
+ struct acpi_sleep_functions *sleep_functions =
+ &acpi_sleep_dispatch[function_id];
+
+#if (!ACPI_REDUCED_HARDWARE)
+
+ /*
+ * If the Hardware Reduced flag is set (from the FADT), we must
+ * use the extended sleep registers
+ */
+ if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
+ status = sleep_functions->extended_function(sleep_state);
+ } else {
+ /* Legacy sleep */
+
+ status = sleep_functions->legacy_function(sleep_state);
+ }
+
+ return (status);
+
+#else
+ /*
+ * For the case where reduced-hardware-only code is being generated,
+ * we know that only the extended sleep registers are available
+ */
+ status = sleep_functions->extended_function(sleep_state);
+ return (status);
+
+#endif /* !ACPI_REDUCED_HARDWARE */
+}
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_enter_sleep_state_prep
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
- * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
+ * DESCRIPTION: Prepare to enter a system sleep state.
* This function must execute with interrupts enabled.
* We break sleeping into 2 stages so that OSPM can handle
* various OS-specific tasks between the two steps.
*
******************************************************************************/
+
acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
{
acpi_status status;
@@ -291,23 +367,8 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
}
-#if (!ACPI_REDUCED_HARDWARE)
-
- /* If Hardware Reduced flag is set, must use the extended sleep registers */
-
- if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
- status = acpi_hw_extended_sleep(sleep_state);
- } else {
- /* Legacy sleep */
-
- status = acpi_hw_legacy_sleep(sleep_state);
- }
-
-#else
- status = acpi_hw_extended_sleep(sleep_state);
-
-#endif /* !ACPI_REDUCED_HARDWARE */
+ status = acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION);
return_ACPI_STATUS(status);
}
@@ -330,26 +391,9 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
{
acpi_status status;
- ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
-
-
-#if (!ACPI_REDUCED_HARDWARE)
-
- /* If Hardware Reduced flag is set, must use the extended sleep registers */
-
- if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
- status = acpi_hw_extended_wake_prep(sleep_state);
- } else {
- /* Legacy sleep */
-
- status = acpi_hw_legacy_wake_prep(sleep_state);
- }
-#else
- status = acpi_hw_extended_wake_prep(sleep_state);
-
-#endif /* !ACPI_REDUCED_HARDWARE */
-
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
+ status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_PREP_FUNCTION);
return_ACPI_STATUS(status);
}
@@ -359,7 +403,7 @@ ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep)
*
* FUNCTION: acpi_leave_sleep_state
*
- * PARAMETERS: sleep_state - Which sleep state we just exited
+ * PARAMETERS: sleep_state - Which sleep state we are exiting
*
* RETURN: Status
*
@@ -374,23 +418,7 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
-#if (!ACPI_REDUCED_HARDWARE)
-
- /* If Hardware Reduced flag is set, must use the extended sleep registers */
-
- if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
- status = acpi_hw_extended_wake(sleep_state);
- } else {
- /* Legacy sleep */
-
- status = acpi_hw_legacy_wake(sleep_state);
- }
-
-#else
- status = acpi_hw_extended_wake(sleep_state);
-
-#endif /* !ACPI_REDUCED_HARDWARE */
-
+ status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_FUNCTION);
return_ACPI_STATUS(status);
}
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 48c4d5f..3496158 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -788,6 +788,15 @@ typedef u8 acpi_adr_space_type;
#define ACPI_ENABLE_EVENT 1
#define ACPI_DISABLE_EVENT 0
+/* Sleep function dispatch */
+
+typedef acpi_status(*ACPI_SLEEP_FUNCTION) (u8 sleep_state);
+
+struct acpi_sleep_functions {
+ ACPI_SLEEP_FUNCTION legacy_function;
+ ACPI_SLEEP_FUNCTION extended_function;
+};
+
/*
* External ACPI object definition
*/
--
1.7.10.rc2.19.gfae9d
--
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