Commit 9b229fa0 authored Nov 04, 2009 by Catalin Marinas

Check whether the SCU was already initialised

If Linux is running in non-secure mode, this register may have been
already initialised and writing to the control register not allowed.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 1b3a02eb

arch/arm/kernel/smp_scu.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,10 @@ void __init scu_enable(void __iomem *scu_base)
		u32 scu_ctrl;

		scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
		/* already enabled? */
		if (scu_ctrl & 1)
		return;

		scu_ctrl \|= 1;
		__raw_writel(scu_ctrl, scu_base + SCU_CTRL);