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[bitops] Fix definitions for big-endian devices 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/42/head
Michael Brown 2015-11-30 22:22:13 +00:00
parent ed18cd5678
commit 4957285b22
1 changed files with 13 additions and 6 deletions
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19
src/include/ipxe/bitops.h
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@ -38,19 +38,21 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/* Endianness selection.
*
* This is a property of the NIC, not a property of the host CPU.
* This is a property of the device, not a property of the host CPU.
*/
#ifdef BITOPS_LITTLE_ENDIAN
#define cpu_to_BIT64 cpu_to_le64
#define cpu_to_BIT32 cpu_to_le32
#define BIT64_to_cpu le64_to_cpu
#define BIT32_to_cpu le32_to_cpu
#define QWORD_SHIFT( offset, width ) (offset)
#endif
#ifdef BITOPS_BIG_ENDIAN
#define cpu_to_BIT64 cpu_to_be64
#define cpu_to_BIT32 cpu_to_be32
#define BIT64_to_cpu be64_to_cpu
#define BIT32_to_cpu be32_to_cpu
#define QWORD_SHIFT( offset, width ) ( 64 - (offset) - (width) )
#endif
/** Datatype used to represent a bit in the pseudo-structures */
@ -93,6 +95,11 @@ typedef unsigned char pseudo_bit_t;
#define QWORD_BIT_OFFSET( _ptr, _index, _field ) \
( BIT_OFFSET ( _ptr, _field ) - ( 64 * (_index) ) )
/** Qword bit shift for a field within a pseudo_bit_t structure */
#define QWORD_BIT_SHIFT( _ptr, _index, _field ) \
QWORD_SHIFT ( QWORD_BIT_OFFSET ( _ptr, _index, _field ), \
BIT_WIDTH ( _ptr, _field ) )
/** Bit mask for a field within a pseudo_bit_t structure */
#define BIT_MASK( _ptr, _field ) \
( ( ~( ( uint64_t ) 0 ) ) >> \
@ -105,7 +112,7 @@ typedef unsigned char pseudo_bit_t;
#define BIT_ASSEMBLE_1( _ptr, _index, _field, _value ) \
( ( ( uint64_t) (_value) ) << \
QWORD_BIT_OFFSET ( _ptr, _index, _field ) )
QWORD_BIT_SHIFT ( _ptr, _index, _field ) )
#define BIT_ASSEMBLE_2( _ptr, _index, _field, _value, ... ) \
( BIT_ASSEMBLE_1 ( _ptr, _index, _field, _value ) | \
@ -138,7 +145,7 @@ typedef unsigned char pseudo_bit_t;
#define BIT_MASK_1( _ptr, _index, _field ) \
( BIT_MASK ( _ptr, _field ) << \
QWORD_BIT_OFFSET ( _ptr, _index, _field ) )
QWORD_BIT_SHIFT ( _ptr, _index, _field ) )
#define BIT_MASK_2( _ptr, _index, _field, ... ) \
( BIT_MASK_1 ( _ptr, _index, _field ) | \
@ -165,7 +172,7 @@ typedef unsigned char pseudo_bit_t;
BIT_MASK_6 ( _ptr, _index, __VA_ARGS__ ) )
/*
* Populate little-endian qwords from named fields and values
* Populate device-endian qwords from named fields and values
*
*/
@ -212,7 +219,7 @@ typedef unsigned char pseudo_bit_t;
uint64_t *__ptr = &(_ptr)->u.qwords[__index]; \
uint64_t __value = BIT64_to_cpu ( *__ptr ); \
__value >>= \
QWORD_BIT_OFFSET ( _ptr, __index, _field ); \
QWORD_BIT_SHIFT ( _ptr, __index, _field ); \
__value &= BIT_MASK ( _ptr, _field ); \
__value; \
} )
@ -225,7 +232,7 @@ typedef unsigned char pseudo_bit_t;
unsigned int __index = QWORD_OFFSET ( _ptr, _field ); \
uint64_t *__ptr = &(_ptr)->u.qwords[__index]; \
unsigned int __shift = \
QWORD_BIT_OFFSET ( _ptr, __index, _field ); \
QWORD_BIT_SHIFT ( _ptr, __index, _field ); \
uint64_t __value = (_value); \
*__ptr &= cpu_to_BIT64 ( ~( BIT_MASK ( _ptr, _field ) << \
__shift ) ); \