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Diffstat (limited to 'arch/arm/mach-mx3/cpu.c')
| -rw-r--r-- | arch/arm/mach-mx3/cpu.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/cpu.c b/arch/arm/mach-mx3/cpu.c new file mode 100644 index 000000000000..6d709617459c --- /dev/null +++ b/arch/arm/mach-mx3/cpu.c @@ -0,0 +1,74 @@ +/* + * Copyright (C) 2001 Deep Blue Solutions Ltd. + * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +/*! + * @file mach-mx3/cpu.c + * + * @brief This file contains the CPU initialization code. + * + * @ingroup MSL_MX31 + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/iram_alloc.h> +#include <mach/hardware.h> +#include <asm/hardware/cache-l2x0.h> + +/*! + * CPU initialization. It is called by fixup_mxc_board() + */ +void __init mxc_cpu_init(void) +{ + /* Setup Peripheral Port Remap register for AVIC */ + asm("ldr r0, =0xC0000015 \n\ + mcr p15, 0, r0, c15, c2, 4"); + if (!system_rev) { + mxc_set_system_rev(0x31, CHIP_REV_2_0); + } +} + +/*! + * Post CPU init code + * + * @return 0 always + */ +static int __init post_cpu_init(void) +{ + volatile unsigned long aips_reg; + + iram_init(MX31_IRAM_BASE_ADDR, MX31_IRAM_SIZE); + + /* + * S/W workaround: Clear the off platform peripheral modules + * Supervisor Protect bit for SDMA to access them. + */ + __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x40)); + __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x44)); + __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x48)); + __raw_writel(0x0, IO_ADDRESS(AIPS1_BASE_ADDR + 0x4C)); + aips_reg = __raw_readl(IO_ADDRESS(AIPS1_BASE_ADDR + 0x50)); + aips_reg &= 0x00FFFFFF; + __raw_writel(aips_reg, IO_ADDRESS(AIPS1_BASE_ADDR + 0x50)); + + __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x40)); + __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x44)); + __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x48)); + __raw_writel(0x0, IO_ADDRESS(AIPS2_BASE_ADDR + 0x4C)); + aips_reg = __raw_readl(IO_ADDRESS(AIPS2_BASE_ADDR + 0x50)); + aips_reg &= 0x00FFFFFF; + __raw_writel(aips_reg, IO_ADDRESS(AIPS2_BASE_ADDR + 0x50)); + + return 0; +} + +postcore_initcall(post_cpu_init); |