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[linda] Use standard readq() and writeq() implementations 

This driver is the original source of the current readq() and writeq()
implementations for 32-bit iPXE.  Switch to using the now-centralised
definitions, to avoid including architecture-specific code in an
otherwise architecture-independent driver.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/44/head
Michael Brown 2016-03-12 17:42:30 +00:00
parent cc9f31ee0c
commit 5229662b7f
1 changed files with 8 additions and 26 deletions
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34
src/drivers/infiniband/linda.c
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@ -112,32 +112,21 @@ struct linda {
* This card requires atomic 64-bit accesses. Strange things happen
* if you try to use 32-bit accesses; sometimes they work, sometimes
* they don't, sometimes you get random data.
*
* These accessors use the "movq" MMX instruction, and so won't work
* on really old Pentiums (which won't have PCIe anyway, so this is
* something of a moot point).
*/
/**
* Read Linda qword register
*
* @v linda Linda device
* @v dwords Register buffer to read into
* @v qword Register buffer to read into
* @v offset Register offset
*/
static void linda_readq ( struct linda *linda, uint32_t *dwords,
static void linda_readq ( struct linda *linda, uint64_t *qword,
unsigned long offset ) {
void *addr = ( linda->regs + offset );
__asm__ __volatile__ ( "movq (%1), %%mm0\n\t"
"movq %%mm0, (%0)\n\t"
: : "r" ( dwords ), "r" ( addr ) : "memory" );
DBGIO ( "[%08lx] => %08x%08x\n",
virt_to_phys ( addr ), dwords[1], dwords[0] );
*qword = readq ( linda->regs + offset );
}
#define linda_readq( _linda, _ptr, _offset ) \
linda_readq ( (_linda), (_ptr)->u.dwords, (_offset) )
linda_readq ( (_linda), (_ptr)->u.qwords, (_offset) )
#define linda_readq_array8b( _linda, _ptr, _offset, _idx ) \
linda_readq ( (_linda), (_ptr), ( (_offset) + ( (_idx) * 8 ) ) )
#define linda_readq_array64k( _linda, _ptr, _offset, _idx ) \
@ -147,22 +136,15 @@ static void linda_readq ( struct linda *linda, uint32_t *dwords,
* Write Linda qword register
*
* @v linda Linda device
* @v dwords Register buffer to write
* @v qword Register buffer to write
* @v offset Register offset
*/
static void linda_writeq ( struct linda *linda, const uint32_t *dwords,
static void linda_writeq ( struct linda *linda, const uint64_t *qword,
unsigned long offset ) {
void *addr = ( linda->regs + offset );
DBGIO ( "[%08lx] <= %08x%08x\n",
virt_to_phys ( addr ), dwords[1], dwords[0] );
__asm__ __volatile__ ( "movq (%0), %%mm0\n\t"
"movq %%mm0, (%1)\n\t"
: : "r" ( dwords ), "r" ( addr ) : "memory" );
writeq ( *qword, ( linda->regs + offset ) );
}
#define linda_writeq( _linda, _ptr, _offset ) \
linda_writeq ( (_linda), (_ptr)->u.dwords, (_offset) )
linda_writeq ( (_linda), (_ptr)->u.qwords, (_offset) )
#define linda_writeq_array8b( _linda, _ptr, _offset, _idx ) \
linda_writeq ( (_linda), (_ptr), ( (_offset) + ( (_idx) * 8 ) ) )
#define linda_writeq_array64k( _linda, _ptr, _offset, _idx ) \