linux-kernel - [PATCH v7 08/14] arm/tegra: generalize L2 cache initialization

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Message-ID: <1323875032-18221-9-git-send-email-pdeschrijver@nvidia.com>
Date:	Wed, 14 Dec 2011 17:03:20 +0200
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	Russell King <linux@....linux.org.uk>,
	Colin Cross <ccross@...roid.com>,
	Olof Johansson <olof@...om.net>,
	Stephen Warren <swarren@...dia.com>,
	Gary King <gking@...dia.com>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-tegra@...r.kernel.org>
Subject: [PATCH v7 08/14] arm/tegra: generalize L2 cache initialization

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

Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
---
 arch/arm/mach-tegra/common.c |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 8da1847..554f18f 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -73,15 +73,20 @@ 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
 
 }
@@ -92,6 +97,6 @@ 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
-- 
1.7.7.rc0.72.g4b5ea.dirty

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