On 02/25/2014 04:26 AM, Bruno Tunes de Mello wrote:
> Hi Gilles,
> The kernel is booting and I executed latency and xeno-test commands. The
> results are below.
You also need this patch.
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index d9cb476..1e2c52d 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -41,7 +41,7 @@ static inline void cache_wait_way(void __iomem *reg, unsigned
long mask)
{
/* wait for cache operation by line or way to complete */
while (readl_relaxed(reg) & mask)
- ;
+ cpu_relax();
}
#ifdef CONFIG_CACHE_PL310
@@ -136,6 +136,7 @@ static void __l2x0_flush_all(void)
debug_writel(0x00);
}
+#ifndef CONFIG_IPIPE
static void l2x0_flush_all(void)
{
unsigned long flags;
@@ -157,6 +158,81 @@ static void l2x0_clean_all(void)
cache_sync();
spin_unlock_irqrestore(&l2x0_lock, flags);
}
+#else
+static void l2x0_clean_inv_line_idx(unsigned line, unsigned way)
+{
+ void __iomem *base = l2x0_base;
+
+ writel_relaxed((way << 28) | (line << 5),
+ base + L2X0_CLEAN_INV_LINE_IDX);
+ cache_wait(base + L2X0_CLEAN_INV_LINE_IDX, 1);
+}
+
+static void l2x0_flush_way(unsigned way, unsigned len, unsigned lines)
+{
+ unsigned long flags;
+ unsigned line, i;
+
+ for (line = 0; line < lines; line += len ) {
+ spin_lock_irqsave(&l2x0_lock, flags);
+ debug_writel(0x03);
+ for (i = 0; i < len && line + i < lines; i++)
+ l2x0_clean_inv_line_idx(line + i, way);
+ cache_sync();
+ debug_writel(0x00);
+ spin_unlock_irqrestore(&l2x0_lock, flags);
+ }
+}
+
+static void l2x0_flush_all(void)
+{
+ unsigned lines, len, way, ways;
+
+ ways = fls(l2x0_way_mask);
+ lines = l2x0_size / (ways * CACHE_LINE_SIZE);
+ len = L2X0_SPINLOCK_LEN / CACHE_LINE_SIZE;
+
+ for (way = 0; way < ways; way++)
+ l2x0_flush_way(way, len, lines);
+}
+
+static void l2x0_clean_line_idx(unsigned line, unsigned way)
+{
+ void __iomem *base = l2x0_base;
+
+ writel_relaxed((way << 28) | (line << 5),
+ base + L2X0_CLEAN_LINE_IDX);
+ cache_wait(base + L2X0_CLEAN_LINE_IDX, 1);
+}
+
+static void l2x0_clean_way(unsigned way, unsigned len, unsigned lines)
+{
+ unsigned long flags;
+ unsigned line, i;
+
+ for (line = 0; line < lines; line += len ) {
+ spin_lock_irqsave(&l2x0_lock, flags);
+ debug_writel(0x03);
+ for (i = 0; i < len && line + i < lines; i++)
+ l2x0_clean_line_idx(line + i, way);
+ cache_sync();
+ debug_writel(0x00);
+ spin_unlock_irqrestore(&l2x0_lock, flags);
+ }
+}
+
+static void l2x0_clean_all(void)
+{
+ unsigned lines, len, way, ways;
+
+ ways = fls(l2x0_way_mask);
+ lines = l2x0_size / (ways * CACHE_LINE_SIZE);
+ len = L2X0_SPINLOCK_LEN / CACHE_LINE_SIZE;
+
+ for (way = 0; way < ways; way++)
+ l2x0_clean_way(way, len, lines);
+}
+#endif
static void l2x0_inv_all(void)
{
--
Gilles.
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