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arm: mvebu: Update CBAR with SOC regs base

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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>
This commit is contained in:
Kevin Smith 2015-05-18 16:09:44 +00:00 committed by Luka Perkov
parent 5730360efc
commit e1b078e06c
1 changed files with 7 additions and 0 deletions
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7
arch/arm/mach-mvebu/cpu.c
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@ -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