The background operations of the L2x0 cache controllers are aborted if
another operation is issued on the same or different core. This patch
protects the maintenance operation issuing/polling with a spinlock.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
+#include <linux/spinlock.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
#define CACHE_LINE_SIZE 32
static void __iomem *l2x0_base;
#define CACHE_LINE_SIZE 32
static void __iomem *l2x0_base;
+static DEFINE_SPINLOCK(l2x0_lock);
static inline void sync_writel(unsigned long val, unsigned long reg,
unsigned long complete_mask)
{
static inline void sync_writel(unsigned long val, unsigned long reg,
unsigned long complete_mask)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&l2x0_lock, flags);
writel(val, l2x0_base + reg);
/* wait for the operation to complete */
while (readl(l2x0_base + reg) & complete_mask)
;
writel(val, l2x0_base + reg);
/* wait for the operation to complete */
while (readl(l2x0_base + reg) & complete_mask)
;
+ spin_unlock_irqrestore(&l2x0_lock, flags);
}
static inline void cache_sync(void)
}
static inline void cache_sync(void)