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Diffstat (limited to 'drivers/acpi/acpica/hwregs.c')
-rw-r--r--drivers/acpi/acpica/hwregs.c123
1 files changed, 49 insertions, 74 deletions
diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c
index de74a4c25085..f62d5d024205 100644
--- a/drivers/acpi/acpica/hwregs.c
+++ b/drivers/acpi/acpica/hwregs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
*
* Module Name: hwregs - Read/write access functions for the various ACPI
@@ -5,43 +6,6 @@
*
******************************************************************************/
-/*
- * Copyright (C) 2000 - 2017, Intel Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- */
-
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
@@ -107,7 +71,7 @@ acpi_hw_get_access_bit_width(u64 address,
ACPI_IS_ALIGNED(reg->bit_width, 8)) {
access_bit_width = reg->bit_width;
} else if (reg->access_width) {
- access_bit_width = (1 << (reg->access_width + 2));
+ access_bit_width = ACPI_ACCESS_BIT_WIDTH(reg->access_width);
} else {
access_bit_width =
ACPI_ROUND_UP_POWER_OF_TWO_8(reg->bit_offset +
@@ -220,16 +184,15 @@ acpi_hw_validate_register(struct acpi_generic_address *reg,
*
* RETURN: Status
*
- * DESCRIPTION: Read from either memory or IO space. This is a 32-bit max
- * version of acpi_read, used internally since the overhead of
- * 64-bit values is not needed.
+ * DESCRIPTION: Read from either memory or IO space. This is a 64-bit max
+ * version of acpi_read.
*
* LIMITATIONS: <These limitations also apply to acpi_hw_write>
* space_ID must be system_memory or system_IO.
*
******************************************************************************/
-acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
+acpi_status acpi_hw_read(u64 *value, struct acpi_generic_address *reg)
{
u64 address;
u8 access_width;
@@ -244,17 +207,17 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
/* Validate contents of the GAS register */
- status = acpi_hw_validate_register(reg, 32, &address);
+ status = acpi_hw_validate_register(reg, 64, &address);
if (ACPI_FAILURE(status)) {
return (status);
}
/*
- * Initialize entire 32-bit return value to zero, convert access_width
+ * Initialize entire 64-bit return value to zero, convert access_width
* into number of bits based
*/
*value = 0;
- access_width = acpi_hw_get_access_bit_width(address, reg, 32);
+ access_width = acpi_hw_get_access_bit_width(address, reg, 64);
bit_width = reg->bit_offset + reg->bit_width;
bit_offset = reg->bit_offset;
@@ -265,7 +228,7 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
index = 0;
while (bit_width) {
if (bit_offset >= access_width) {
- value32 = 0;
+ value64 = 0;
bit_offset -= access_width;
} else {
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
@@ -276,7 +239,6 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
ACPI_DIV_8
(access_width),
&value64, access_width);
- value32 = (u32)value64;
} else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
status = acpi_hw_read_port((acpi_io_address)
@@ -286,15 +248,16 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
(access_width),
&value32,
access_width);
+ value64 = (u64)value32;
}
}
/*
* Use offset style bit writes because "Index * AccessWidth" is
- * ensured to be less than 32-bits by acpi_hw_validate_register().
+ * ensured to be less than 64-bits by acpi_hw_validate_register().
*/
ACPI_SET_BITS(value, index * access_width,
- ACPI_MASK_BITS_ABOVE_32(access_width), value32);
+ ACPI_MASK_BITS_ABOVE_64(access_width), value64);
bit_width -=
bit_width > access_width ? access_width : bit_width;
@@ -302,8 +265,9 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
}
ACPI_DEBUG_PRINT((ACPI_DB_IO,
- "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
- *value, access_width, ACPI_FORMAT_UINT64(address),
+ "Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
+ ACPI_FORMAT_UINT64(*value), access_width,
+ ACPI_FORMAT_UINT64(address),
acpi_ut_get_region_name(reg->space_id)));
return (status);
@@ -318,20 +282,18 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
*
* RETURN: Status
*
- * DESCRIPTION: Write to either memory or IO space. This is a 32-bit max
- * version of acpi_write, used internally since the overhead of
- * 64-bit values is not needed.
+ * DESCRIPTION: Write to either memory or IO space. This is a 64-bit max
+ * version of acpi_write.
*
******************************************************************************/
-acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
+acpi_status acpi_hw_write(u64 value, struct acpi_generic_address *reg)
{
u64 address;
u8 access_width;
u32 bit_width;
u8 bit_offset;
u64 value64;
- u32 value32;
u8 index;
acpi_status status;
@@ -339,14 +301,14 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
/* Validate contents of the GAS register */
- status = acpi_hw_validate_register(reg, 32, &address);
+ status = acpi_hw_validate_register(reg, 64, &address);
if (ACPI_FAILURE(status)) {
return (status);
}
/* Convert access_width into number of bits based */
- access_width = acpi_hw_get_access_bit_width(address, reg, 32);
+ access_width = acpi_hw_get_access_bit_width(address, reg, 64);
bit_width = reg->bit_offset + reg->bit_width;
bit_offset = reg->bit_offset;
@@ -358,16 +320,15 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
while (bit_width) {
/*
* Use offset style bit reads because "Index * AccessWidth" is
- * ensured to be less than 32-bits by acpi_hw_validate_register().
+ * ensured to be less than 64-bits by acpi_hw_validate_register().
*/
- value32 = ACPI_GET_BITS(&value, index * access_width,
- ACPI_MASK_BITS_ABOVE_32(access_width));
+ value64 = ACPI_GET_BITS(&value, index * access_width,
+ ACPI_MASK_BITS_ABOVE_64(access_width));
if (bit_offset >= access_width) {
bit_offset -= access_width;
} else {
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
- value64 = (u64)value32;
status =
acpi_os_write_memory((acpi_physical_address)
address +
@@ -382,7 +343,7 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
index *
ACPI_DIV_8
(access_width),
- value32,
+ (u32)value64,
access_width);
}
}
@@ -397,8 +358,9 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
}
ACPI_DEBUG_PRINT((ACPI_DB_IO,
- "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
- value, access_width, ACPI_FORMAT_UINT64(address),
+ "Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n",
+ ACPI_FORMAT_UINT64(value), access_width,
+ ACPI_FORMAT_UINT64(address),
acpi_ut_get_region_name(reg->space_id)));
return (status);
@@ -428,14 +390,14 @@ acpi_status acpi_hw_clear_acpi_status(void)
ACPI_BITMASK_ALL_FIXED_STATUS,
ACPI_FORMAT_UINT64(acpi_gbl_xpm1a_status.address)));
- lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
+ lock_flags = acpi_os_acquire_raw_lock(acpi_gbl_hardware_lock);
/* Clear the fixed events in PM1 A/B */
status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS,
ACPI_BITMASK_ALL_FIXED_STATUS);
- acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
+ acpi_os_release_raw_lock(acpi_gbl_hardware_lock, lock_flags);
if (ACPI_FAILURE(status)) {
goto exit;
@@ -484,7 +446,7 @@ struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id)
* RETURN: Status
*
* DESCRIPTION: Write the PM1 A/B control registers. These registers are
- * different than than the PM1 A/B status and enable registers
+ * different than the PM1 A/B status and enable registers
* in that different values can be written to the A/B registers.
* Most notably, the SLP_TYP bits can be different, as per the
* values returned from the _Sx predefined methods.
@@ -526,6 +488,7 @@ acpi_status acpi_hw_write_pm1_control(u32 pm1a_control, u32 pm1b_control)
acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value)
{
u32 value = 0;
+ u64 value64;
acpi_status status;
ACPI_FUNCTION_TRACE(hw_register_read);
@@ -564,12 +527,19 @@ acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value)
case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
status =
- acpi_hw_read(&value, &acpi_gbl_FADT.xpm2_control_block);
+ acpi_hw_read(&value64, &acpi_gbl_FADT.xpm2_control_block);
+ if (ACPI_SUCCESS(status)) {
+ value = (u32)value64;
+ }
break;
case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
- status = acpi_hw_read(&value, &acpi_gbl_FADT.xpm_timer_block);
+ status = acpi_hw_read(&value64, &acpi_gbl_FADT.xpm_timer_block);
+ if (ACPI_SUCCESS(status)) {
+ value = (u32)value64;
+ }
+
break;
case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
@@ -586,7 +556,7 @@ acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value)
}
if (ACPI_SUCCESS(status)) {
- *return_value = value;
+ *return_value = (u32)value;
}
return_ACPI_STATUS(status);
@@ -622,6 +592,7 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
{
acpi_status status;
u32 read_value;
+ u64 read_value64;
ACPI_FUNCTION_TRACE(hw_register_write);
@@ -685,11 +656,12 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
* as per the ACPI spec.
*/
status =
- acpi_hw_read(&read_value,
+ acpi_hw_read(&read_value64,
&acpi_gbl_FADT.xpm2_control_block);
if (ACPI_FAILURE(status)) {
goto exit;
}
+ read_value = (u32)read_value64;
/* Insert the bits to be preserved */
@@ -745,22 +717,25 @@ acpi_hw_read_multiple(u32 *value,
{
u32 value_a = 0;
u32 value_b = 0;
+ u64 value64;
acpi_status status;
/* The first register is always required */
- status = acpi_hw_read(&value_a, register_a);
+ status = acpi_hw_read(&value64, register_a);
if (ACPI_FAILURE(status)) {
return (status);
}
+ value_a = (u32)value64;
/* Second register is optional */
if (register_b->address) {
- status = acpi_hw_read(&value_b, register_b);
+ status = acpi_hw_read(&value64, register_b);
if (ACPI_FAILURE(status)) {
return (status);
}
+ value_b = (u32)value64;
}
/*
generated by cgit (git 2.34.1) at 2025-12-25 16:51:30 +0000