linux-kernel - [PATCH RFC 9/9] arm: imx: non-secure aliased mapping of GIC registers

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Date:	Mon, 21 Jul 2014 15:47:20 +0100
From:	Daniel Thompson <daniel.thompson@...aro.org>
To:	Russell King <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Cc:	Daniel Thompson <daniel.thompson@...aro.org>,
	Marex Vasut <marex@...x.de>, Harro Haan <hrhaan@...il.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	patches@...aro.org, linaro-kernel@...ts.linaro.org,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH RFC 9/9] arm: imx: non-secure aliased mapping of GIC registers

Signed-off-by: Daniel Thompson <daniel.thompson@...aro.org>
---
 arch/arm/mach-imx/mach-imx6q.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index e60456d..192d268 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -381,10 +381,21 @@ static void __init imx6q_init_late(void)
 	}
 }
 
+static struct map_desc gic_cpu_io_desc __initdata = {
+		.virtual        = 0xff000000,
+		.pfn            = __phys_to_pfn(0x00a00000),
+		.length         = SZ_1M,
+		.type           = MT_DEVICE_NS,
+};
+
 static void __init imx6q_map_io(void)
 {
 	debug_ll_io_init();
 	imx_scu_map_io();
+	/* TODO: Need to check we are running without a secure monitor before
+	 *       setting up this mapping.
+	 */
+	iotable_init(&gic_cpu_io_desc, 1);
 }
 
 static void __init imx6q_init_irq(void)
-- 
1.9.3

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