diff options
Diffstat (limited to 'arch/arm/mm/cache-l2x0.c')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 9982eb385c0f..cf793e89315d 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -26,6 +26,7 @@ #define CACHE_LINE_SIZE 32 static void __iomem *l2x0_base; +static unsigned long l2x0_aux; static DEFINE_SPINLOCK(l2x0_lock); static uint32_t l2x0_way_mask; /* Bitmask of active ways */ @@ -115,6 +116,18 @@ static inline void l2x0_inv_all(void) spin_unlock_irqrestore(&l2x0_lock, flags); } +static void l2x0_flush_all(void) +{ + unsigned long flags; + + /* clean and invalidate all ways */ + spin_lock_irqsave(&l2x0_lock, flags); + writel(0xff, l2x0_base + L2X0_CLEAN_INV_WAY); + cache_wait(l2x0_base + L2X0_CLEAN_INV_WAY, 0xff); + cache_sync(); + spin_unlock_irqrestore(&l2x0_lock, flags); +} + static void l2x0_inv_range(unsigned long start, unsigned long end) { void __iomem *base = l2x0_base; @@ -220,6 +233,7 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) aux &= aux_mask; aux |= aux_val; + l2x0_aux = aux; /* Determine the number of ways */ switch (cache_id & L2X0_CACHE_ID_PART_MASK) { @@ -268,3 +282,23 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) printk(KERN_INFO "l2x0: %d ways, CACHE_ID 0x%08x, AUX_CTRL 0x%08x\n", ways, cache_id, aux); } + +void l2x0_disable(void) +{ + if (readl(l2x0_base + L2X0_CTRL) + && !(readl(l2x0_base + L2X0_DEBUG_CTRL) & 0x2)) { + l2x0_flush_all(); + writel(0, l2x0_base + L2X0_CTRL); + l2x0_flush_all(); + } +} + +void l2x0_enable(void) +{ + if (!readl(l2x0_base + L2X0_CTRL)) { + writel(l2x0_aux, l2x0_base + L2X0_AUX_CTRL); + l2x0_inv_all(); + /* enable L2X0 */ + writel(1, l2x0_base + L2X0_CTRL); + } +} |