From e1b078e06c8be4c1991132fdc4cb8ca996ab2c4c Mon Sep 17 00:00:00 2001
From: Kevin Smith <kevin.smith@elecsyscorp.com>
Date: Mon, 18 May 2015 16:09:44 +0000
Subject: [PATCH] arm: mvebu: Update CBAR with SOC regs base
SMP-enabled Linux kernels read the CBAR register in CP15 to find
the address of the SCU registers. After remapping internal
registers, also update the CBAR so the kernel can find them.
Signed-off-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Acked-by: Stefan Roese <sr@denx.de>
---
arch/arm/mach-mvebu/cpu.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c
index 417fc35149..0121db8bb5 100644
--- a/arch/arm/mach-mvebu/cpu.c
+++ b/arch/arm/mach-mvebu/cpu.c
@@ -161,10 +161,17 @@ static void update_sdram_window_sizes(void)
}
#ifdef CONFIG_ARCH_CPU_INIT
+static void set_cbar(u32 addr)
+{
+ asm("mcr p15, 4, %0, c15, c0" : : "r" (addr));
+}
+
+
int arch_cpu_init(void)
{
/* Linux expects the internal registers to be at 0xf1000000 */
writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG);
+ set_cbar(SOC_REGS_PHY_BASE + 0xC000);
/*
* We need to call mvebu_mbus_probe() before calling
--
2.39.5