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ARM: l2c: implement L2C-310 erratum 588369 as a method override

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Implement L2C-310 erratum 588369 by overriding the invalidate range
and flush range methods in the outer_cache operations structure.
This allows us to sensibly contain the erratum code in one place
without affecting other locations/implemetations.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2014-03-15 19:08:11 +00:00
parent 99ca1772e5
commit ebd4219f10
1 changed files with 69 additions and 0 deletions
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69
arch/arm/mm/cache-l2x0.c
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@ -522,6 +522,65 @@ static void l2c310_set_debug(unsigned long val)
writel_relaxed(val, l2x0_base + L2X0_DEBUG_CTRL);
}
static void l2c310_inv_range_erratum(unsigned long start, unsigned long end)
{
void __iomem *base = l2x0_base;
if ((start | end) & (CACHE_LINE_SIZE - 1)) {
unsigned long flags;
/* Erratum 588369 for both clean+invalidate operations */
raw_spin_lock_irqsave(&l2x0_lock, flags);
l2c_set_debug(base, 0x03);
if (start & (CACHE_LINE_SIZE - 1)) {
start &= ~(CACHE_LINE_SIZE - 1);
writel_relaxed(start, base + L2X0_CLEAN_LINE_PA);
writel_relaxed(start, base + L2X0_INV_LINE_PA);
start += CACHE_LINE_SIZE;
}
if (end & (CACHE_LINE_SIZE - 1)) {
end &= ~(CACHE_LINE_SIZE - 1);
writel_relaxed(end, base + L2X0_CLEAN_LINE_PA);
writel_relaxed(end, base + L2X0_INV_LINE_PA);
}
l2c_set_debug(base, 0x00);
raw_spin_unlock_irqrestore(&l2x0_lock, flags);
}
__l2c210_op_pa_range(base + L2X0_INV_LINE_PA, start, end);
__l2c210_cache_sync(base);
}
static void l2c310_flush_range_erratum(unsigned long start, unsigned long end)
{
raw_spinlock_t *lock = &l2x0_lock;
unsigned long flags;
void __iomem *base = l2x0_base;
raw_spin_lock_irqsave(lock, flags);
while (start < end) {
unsigned long blk_end = start + min(end - start, 4096UL);
l2c_set_debug(base, 0x03);
while (start < blk_end) {
writel_relaxed(start, base + L2X0_CLEAN_LINE_PA);
writel_relaxed(start, base + L2X0_INV_LINE_PA);
start += CACHE_LINE_SIZE;
}
l2c_set_debug(base, 0x00);
if (blk_end < end) {
raw_spin_unlock_irqrestore(lock, flags);
raw_spin_lock_irqsave(lock, flags);
}
}
raw_spin_unlock_irqrestore(lock, flags);
__l2c210_cache_sync(base);
}
static void l2c310_flush_all_erratum(void)
{
void __iomem *base = l2x0_base;
@ -600,9 +659,19 @@ static void __init l2c310_fixup(void __iomem *base, u32 cache_id,
const char *errata[4];
unsigned n = 0;
/* For compatibility */
if (revision <= L310_CACHE_ID_RTL_R3P0)
fns->set_debug = l2c310_set_debug;
if (IS_ENABLED(CONFIG_PL310_ERRATA_588369) &&
revision < L310_CACHE_ID_RTL_R2P0 &&
/* For bcm compatibility */
fns->inv_range == l2x0_inv_range) {
fns->inv_range = l2c310_inv_range_erratum;
fns->flush_range = l2c310_flush_range_erratum;
errata[n++] = "588369";
}
if (IS_ENABLED(CONFIG_PL310_ERRATA_727915) &&
revision >= L310_CACHE_ID_RTL_R2P0 &&
revision < L310_CACHE_ID_RTL_R3P1) {