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ARM: l2c: provide generic helper for way-based operations 

Provide a generic helper function for way based operations.  These are
always background operations, and thus have to be waited for before a
new operation is commenced.  This helper extracts that requirement from
several locations in the code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2014-03-15 16:47:56 +00:00
parent 37abcdb919
commit df5dd4c6e2
1 changed files with 9 additions and 6 deletions
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15
arch/arm/mm/cache-l2x0.c
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@ -70,6 +70,12 @@ static inline void l2c_set_debug(void __iomem *base, unsigned long val)
outer_cache.set_debug(val);
}
static void __l2c_op_way(void __iomem *reg)
{
writel_relaxed(l2x0_way_mask, reg);
cache_wait_way(reg, l2x0_way_mask);
}
static inline void l2c_unlock(void __iomem *base, unsigned num)
{
unsigned i;
@ -166,8 +172,7 @@ static void l2x0_cache_sync(void)
static void __l2x0_flush_all(void)
{
debug_writel(0x03);
writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_INV_WAY);
cache_wait_way(l2x0_base + L2X0_CLEAN_INV_WAY, l2x0_way_mask);
__l2c_op_way(l2x0_base + L2X0_CLEAN_INV_WAY);
cache_sync();
debug_writel(0x00);
}
@ -188,8 +193,7 @@ static void l2x0_clean_all(void)
/* clean all ways */
raw_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);
__l2c_op_way(l2x0_base + L2X0_CLEAN_WAY);
cache_sync();
raw_spin_unlock_irqrestore(&l2x0_lock, flags);
}
@ -202,8 +206,7 @@ static void l2x0_inv_all(void)
raw_spin_lock_irqsave(&l2x0_lock, flags);
/* Invalidating when L2 is enabled is a nono */
BUG_ON(readl(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN);
writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_INV_WAY);
cache_wait_way(l2x0_base + L2X0_INV_WAY, l2x0_way_mask);
__l2c_op_way(l2x0_base + L2X0_INV_WAY);
cache_sync();
raw_spin_unlock_irqrestore(&l2x0_lock, flags);
}