arm/tegra: generalize L2 cache initialization

Generalize L2 cache initialization and discover L2 cache associativity at
runtime.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Colin Cross <ccross@android.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 007d34f..a5c14dc 100644 (file)
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -75,15 +75,20 @@ static __initdata struct tegra_clk_init_table tegra20_clk_init_table[] = {
 };
 #endif
 
-static void __init tegra_init_cache(void)
+static void __init tegra_init_cache(u32 tag_latency, u32 data_latency)
 {
 #ifdef CONFIG_CACHE_L2X0
        void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
+       u32 aux_ctrl, cache_type;
 
-       writel_relaxed(0x331, p + L2X0_TAG_LATENCY_CTRL);
-       writel_relaxed(0x441, p + L2X0_DATA_LATENCY_CTRL);
+       writel_relaxed(tag_latency, p + L2X0_TAG_LATENCY_CTRL);
+       writel_relaxed(data_latency, p + L2X0_DATA_LATENCY_CTRL);
 
-       l2x0_init(p, 0x6C080001, 0x8200c3fe);
+       cache_type = readl(p + L2X0_CACHE_TYPE);
+       aux_ctrl = (cache_type & 0x700) << (17-8);
+       aux_ctrl |= 0x6C000001;
+
+       l2x0_init(p, aux_ctrl, 0x8200c3fe);
 #endif
 
 }
@@ -94,6 +99,6 @@ void __init tegra20_init_early(void)
        tegra_init_fuse();
        tegra2_init_clocks();
        tegra_clk_init_from_table(tegra20_clk_init_table);
-       tegra_init_cache();
+       tegra_init_cache(0x331, 0x441);
 }
 #endif