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arch: x86: core: Add cache flush function for x86

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Adding just the cache flush function for x86. The name
arch_cache_flush comply with API names in include/cache.h

Signed-off-by: Aastha Grover <aastha.grover@intel.com>
This commit is contained in:
Aastha Grover 2020-06-17 15:50:47 -07:00 committed by Andrew Boie
parent 97ecad69f0
commit ffd8e8aefc
1 changed files with 5 additions and 26 deletions
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31
arch/x86/core/ia32/cache.c
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@ -47,15 +47,15 @@ extern size_t z_cache_line_size_get(void);
* @return N/A
*/
_sys_cache_flush_sig(_cache_flush_clflush)
void arch_dcache_flush(void *start_addr, size_t size)
{
int end;
uintptr_t end;
size = ROUND_UP(size, sys_cache_line_size);
end = virt + size;
end = (uintptr_t)start_addr + size;
for (; virt < end; virt += sys_cache_line_size) {
__asm__ volatile("clflush %0;\n\t" : : "m"(virt));
for (; (uintptr_t)start_addr < end; (uintptr_t)start_addr += sys_cache_line_size) {
__asm__ volatile("clflush %0;\n\t" : : "m"((uintptr_t)start_addr));
}
__asm__ volatile("mfence;\n\t");
@ -67,26 +67,6 @@ _sys_cache_flush_sig(_cache_flush_clflush)
#include <init.h>
#if defined(CONFIG_CLFLUSH_DETECT)
_sys_cache_flush_t *sys_cache_flush;
static void init_cache_flush(void)
{
if (z_is_clflush_available()) {
sys_cache_flush = _cache_flush_clflush;
} else {
sys_cache_flush = z_cache_flush_wbinvd;
}
}
#else
#define init_cache_flush() do { } while (false)
#if defined(CONFIG_CLFLUSH_INSTRUCTION_SUPPORTED)
FUNC_ALIAS(_cache_flush_clflush, sys_cache_flush, void);
#endif
#endif /* CONFIG_CLFLUSH_DETECT */
#if defined(CONFIG_CACHE_LINE_SIZE_DETECT)
size_t sys_cache_line_size;
static void init_cache_line_size(void)
@ -110,7 +90,6 @@ static int init_cache(struct device *unused)
{
ARG_UNUSED(unused);
init_cache_flush();
init_cache_line_size();
return 0;