RTOS/rtems
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2000-08-10 Charles-Antoine Gauthier <charles.gauthier@nrc.ca>

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* shared/src/cache_manager.c (rtems_cache_flush_multiple_data_lines,
	rtems_cache_invalidate_multiple_data_lines): Do not operate on the
	entire address space when flushing zero bytes.
This commit is contained in:
Joel Sherrill
2000-08-10 14:09:51 +00:00
parent e94ad1feb9
commit d2978ee987
1 changed files with 12 additions and 0 deletions
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12
c/src/lib/libcpu/shared/src/cache_manager.c
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@@ -57,6 +57,10 @@ rtems_cache_flush_multiple_data_lines( const void * d_addr, size_t n_bytes )
* the resulting line until final_address is passed.
*/
if( n_bytes == 0 )
/* Do nothing if number of bytes to flush is zero */
return;
final_address = (void *)((size_t)d_addr + n_bytes - 1);
d_addr = (void *)((size_t)d_addr & ~(CPU_DATA_CACHE_ALIGNMENT - 1));
while( d_addr <= final_address ) {
@@ -85,6 +89,10 @@ rtems_cache_invalidate_multiple_data_lines( const void * d_addr, size_t n_bytes
* invalidate the resulting line until final_address is passed.
*/
if( n_bytes == 0 )
/* Do nothing if number of bytes to invalidate is zero */
return;
final_address = (void *)((size_t)d_addr + n_bytes - 1);
d_addr = (void *)((size_t)d_addr & ~(CPU_DATA_CACHE_ALIGNMENT - 1));
while( final_address > d_addr ) {
@@ -208,6 +216,10 @@ rtems_cache_invalidate_multiple_instruction_lines( const void * i_addr, size_t n
* invalidate the resulting line until final_address is passed.
*/
if( n_bytes == 0 )
/* Do nothing if number of bytes to invalidate is zero */
return;
final_address = (void *)((size_t)i_addr + n_bytes - 1);
i_addr = (void *)((size_t)i_addr & ~(CPU_INSTRUCTION_CACHE_ALIGNMENT - 1));
while( final_address > i_addr ) {