iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: l2c: implement L2C-310 erratum 727915 as a method override

Browse Source 
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: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2014-03-15 16:48:18 +00:00
parent 6a28cf59ff
commit 99ca1772e5
1 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
arch/arm/mm/cache-l2x0.c
View File

@ -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;