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Commit 444457c1 authored by Santosh Shilimkar's avatar Santosh Shilimkar
Browse files

ARM: l2x0: Optimise the range based operations 



For the big buffers which are in excess of cache size, the maintaince
operations by PA are very slow. For such buffers the maintainace
operations can be speeded up by using the WAY based method.

Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Acked-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
parent 5ba70372

arch/arm/mm/cache-l2x0.c

+22 −0
Original line number Diff line number Diff line
@@ -125,6 +125,18 @@ static void l2x0_flush_all(void) 
	spin_unlock_irqrestore(&l2x0_lock, flags);

}



static void l2x0_clean_all(void)

{

	unsigned long flags;



	/* clean all ways */

	spin_lock_irqsave(&l2x0_lock, flags);

	writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_WAY);

	cache_wait_way(l2x0_base + L2X0_CLEAN_WAY, l2x0_way_mask);

	cache_sync();

	spin_unlock_irqrestore(&l2x0_lock, flags);

}



static void l2x0_inv_all(void)

{

	unsigned long flags;
@@ -183,6 +195,11 @@ static void l2x0_clean_range(unsigned long start, unsigned long end) 
	void __iomem *base = l2x0_base;

	unsigned long flags;



	if ((end - start) >= l2x0_size) {

		l2x0_clean_all();

		return;

	}



	spin_lock_irqsave(&l2x0_lock, flags);

	start &= ~(CACHE_LINE_SIZE - 1);

	while (start < end) {
@@ -208,6 +225,11 @@ static void l2x0_flush_range(unsigned long start, unsigned long end) 
	void __iomem *base = l2x0_base;

	unsigned long flags;



	if ((end - start) >= l2x0_size) {

		l2x0_flush_all();

		return;

	}



	spin_lock_irqsave(&l2x0_lock, flags);

	start &= ~(CACHE_LINE_SIZE - 1);

	while (start < end) {