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Commit 99ca1772 authored by Russell King's avatar Russell King
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ARM: l2c: implement L2C-310 erratum 727915 as a method override 



Implement L2C-310 erratum 727915 by overriding the flush_all method
in the outer_cache operations structure.  This allows us to sensibly
contain the erratum code in one place without affecting other
locations or implementations.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 6a28cf59

arch/arm/mm/cache-l2x0.c

+20 −0
Original line number Diff line number Diff line
@@ -522,6 +522,19 @@ static void l2c310_set_debug(unsigned long val) 
	writel_relaxed(val, l2x0_base + L2X0_DEBUG_CTRL);

}



static void l2c310_flush_all_erratum(void)

{

	void __iomem *base = l2x0_base;

	unsigned long flags;



	raw_spin_lock_irqsave(&l2x0_lock, flags);

	l2c_set_debug(base, 0x03);

	__l2c_op_way(base + L2X0_CLEAN_INV_WAY);

	l2c_set_debug(base, 0x00);

	__l2c210_cache_sync(base);

	raw_spin_unlock_irqrestore(&l2x0_lock, flags);

}



static void __init l2c310_save(void __iomem *base)

{

	unsigned revision;
@@ -590,6 +603,13 @@ static void __init l2c310_fixup(void __iomem *base, u32 cache_id, 
	if (revision <= L310_CACHE_ID_RTL_R3P0)

		fns->set_debug = l2c310_set_debug;



	if (IS_ENABLED(CONFIG_PL310_ERRATA_727915) &&

	    revision >= L310_CACHE_ID_RTL_R2P0 &&

	    revision < L310_CACHE_ID_RTL_R3P1) {

		fns->flush_all = l2c310_flush_all_erratum;

		errata[n++] = "727915";

	}



	if (IS_ENABLED(CONFIG_PL310_ERRATA_753970) &&

	    revision == L310_CACHE_ID_RTL_R3P0) {

		sync_reg_offset = L2X0_DUMMY_REG;