diff options
Diffstat (limited to 'drivers/acpi/acpica/acmacros.h')
| -rw-r--r-- | drivers/acpi/acpica/acmacros.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/acmacros.h b/drivers/acpi/acpica/acmacros.h index ecbaabae59e7..a3b95431b7c5 100644 --- a/drivers/acpi/acpica/acmacros.h +++ b/drivers/acpi/acpica/acmacros.h @@ -270,9 +270,21 @@ * Bit positions start at zero. * MASK_BITS_ABOVE creates a mask starting AT the position and above * MASK_BITS_BELOW creates a mask starting one bit BELOW the position + * MASK_BITS_ABOVE/BELOW accpets a bit offset to create a mask + * MASK_BITS_ABOVE/BELOW_32/64 accpets a bit width to create a mask + * Note: The ACPI_INTEGER_BIT_SIZE check is used to bypass compiler + * differences with the shift operator */ #define ACPI_MASK_BITS_ABOVE(position) (~((ACPI_UINT64_MAX) << ((u32) (position)))) #define ACPI_MASK_BITS_BELOW(position) ((ACPI_UINT64_MAX) << ((u32) (position))) +#define ACPI_MASK_BITS_ABOVE_32(width) ((u32) ACPI_MASK_BITS_ABOVE(width)) +#define ACPI_MASK_BITS_BELOW_32(width) ((u32) ACPI_MASK_BITS_BELOW(width)) +#define ACPI_MASK_BITS_ABOVE_64(width) ((width) == ACPI_INTEGER_BIT_SIZE ? \ + ACPI_UINT64_MAX : \ + ACPI_MASK_BITS_ABOVE(width)) +#define ACPI_MASK_BITS_BELOW_64(width) ((width) == ACPI_INTEGER_BIT_SIZE ? \ + (u64) 0 : \ + ACPI_MASK_BITS_BELOW(width)) /* Bitfields within ACPI registers */ |