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libdl/rtl-obj.c: synchronize cache should not depend on CPU_CACHE_LINE_BYTES.

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The CPU_CACHE_LINE_BYTES has been introduced after 4.11 branch
fork and is not available for all architectures on RTEMS 4.11.

Use of rtems_cache_get_maximal_line_size() is more descriptive
choice. The min/max data/instruction cache line size is not critical
there, value is used for optimization only to use single operation
for decently following sections.
This commit is contained in:
Pavel Pisa
2016-10-03 11:01:39 +02:00
parent 2b54e73fb0
commit 9d423d9c96
1 changed files with 6 additions and 3 deletions
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9
cpukit/libdl/rtl-obj.c
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@@ -566,6 +566,7 @@ typedef struct
uint32_t mask;
void *start_va;
void *end_va;
size_t cache_line_size;
} rtems_rtl_obj_sect_sync_ctx_t;
static bool
@@ -582,10 +583,10 @@ rtems_rtl_obj_sect_sync_handler (rtems_chain_node* node, void* data)
if (sync_ctx->end_va == sync_ctx->start_va) {
sync_ctx->start_va = sect->base;
} else {
old_end = (uintptr_t)sync_ctx->end_va & ~(CPU_CACHE_LINE_BYTES - 1);
new_start = (uintptr_t)sect->base & ~(CPU_CACHE_LINE_BYTES - 1);
old_end = (uintptr_t)sync_ctx->end_va & ~(sync_ctx->cache_line_size - 1);
new_start = (uintptr_t)sect->base & ~(sync_ctx->cache_line_size - 1);
if ( (sect->base < sync_ctx->start_va) ||
(new_start - old_end > CPU_CACHE_LINE_BYTES) ) {
(new_start - old_end > sync_ctx->cache_line_size) ) {
rtems_cache_instruction_sync_after_code_change(sync_ctx->start_va,
sync_ctx->end_va - sync_ctx->start_va + 1);
sync_ctx->start_va = sect->base;
@@ -605,6 +606,8 @@ rtems_rtl_obj_synchronize_cache (rtems_rtl_obj_t* obj)
if (rtems_cache_get_instruction_line_size() == 0)
return;
sync_ctx.cache_line_size = rtems_cache_get_maximal_line_size();
sync_ctx.mask = RTEMS_RTL_OBJ_SECT_TEXT | RTEMS_RTL_OBJ_SECT_CONST |
RTEMS_RTL_OBJ_SECT_DATA | RTEMS_RTL_OBJ_SECT_BSS |
RTEMS_RTL_OBJ_SECT_EXEC;