armv_setup_1136.c

Centrality Atlas II development software

/*
 * $QNXLicenseC:
 * Copyright 2008, QNX Software Systems. 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"). You 
 * may not reproduce, modify or distribute this software except in 
 * compliance with the License. You may obtain a copy of the License 
 * at: http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 *
 * This file may contain contributions from others, either as 
 * contributors under the License or as licensors under other terms.  
 * Please review this entire file for other proprietary rights or license 
 * notices, as well as the QNX Development Suite License Guide at 
 * http://licensing.qnx.com/license-guide/ for other information.
 * $
 */




#include "startup.h"

/*
 * Additional ARM1136 specific CPU initialisation
 */

void
armv_setup_1136(struct cpuinfo_entry *cpu, unsigned cpuid)
{
	unsigned	tmp;

	/*
	 * Perform generic ARMv6 CPU initialisation
	 */
	armv_setup_v6(cpu, cpuid, 0);

	/*
	 * errata #364296 - possible data cache corruption with hit under miss
	 * errata #380532 - load multiple to pc can be corrupted or deadlock
	 *
	 * Workaround by using undocumented aux cr bit to disable hit under miss
	 */
	mmu_cr_set |= ARM_MMU_CR_FI;
	__asm__ __volatile__(
		"mrc	p15, 0, %0, c0, c0, 1\n"
		"orr	%0, %0, #0x80000000\n"
		"mcr	p15, 0, %0, c0, c0, 1\n"
		: "=r" (tmp)
	);
}

__SRCVERSION("armv_setup_1136.c $Rev: 206932 $");