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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-09-21 08:48:33 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-09-21 08:48:33 +0100 |
| commit | f70cac8d9c7125f83048f8b3d1c60f5a041a165c (patch) | |
| tree | 0d0efd72c1a41f973a919b16aac1d8210ed1ee30 /arch/arm/mm/cache-l2x0.c | |
| parent | 4722cd7741c6404f967f7a7b8b666540b6c1663e (diff) | |
| parent | 08aab447c56a5388cf0c768da476ad022f00fef8 (diff) | |
Merge branch 'kprobes-test' of git://git.yxit.co.uk/linux into devel-stable
Diffstat (limited to 'arch/arm/mm/cache-l2x0.c')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 44c086710d2..9ecfdb51195 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -277,6 +277,25 @@ static void l2x0_disable(void) spin_unlock_irqrestore(&l2x0_lock, flags); } +static void __init l2x0_unlock(__u32 cache_id) +{ + int lockregs; + int i; + + if (cache_id == L2X0_CACHE_ID_PART_L310) + lockregs = 8; + else + /* L210 and unknown types */ + lockregs = 1; + + for (i = 0; i < lockregs; i++) { + writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE + + i * L2X0_LOCKDOWN_STRIDE); + writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE + + i * L2X0_LOCKDOWN_STRIDE); + } +} + void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) { __u32 aux; @@ -328,6 +347,8 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) * accessing the below registers will fault. */ if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & 1)) { + /* Make sure that I&D is not locked down when starting */ + l2x0_unlock(cache_id); /* l2x0 controller is disabled */ writel_relaxed(aux, l2x0_base + L2X0_AUX_CTRL); |