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Yatharth Kochar's avatar
AArch32: Add generic changes in BL1    
Yatharth Kochar committed
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/*
 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of ARM nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <arch.h>
#include <asm_macros.S>
#include <bl_common.h>
#include <context.h>
#include <el3_common_macros.S>
#include <smcc_helpers.h>
#include <smcc_macros.S>

	.globl	bl1_vector_table
	.globl	bl1_entrypoint

	/* -----------------------------------------------------
	 * Setup the vector table to support SVC & MON mode.
	 * -----------------------------------------------------
	 */
vector_base bl1_vector_table
	b	bl1_entrypoint
	b	report_exception	/* Undef */
	b	bl1_aarch32_smc_handler	/* SMC call */
	b	report_exception	/* Prefetch abort */
	b	report_exception	/* Data abort */
	b	report_exception	/* Reserved */
	b	report_exception	/* IRQ */
	b	report_exception	/* FIQ */

	/* -----------------------------------------------------
	 * bl1_entrypoint() is the entry point into the trusted
	 * firmware code when a cpu is released from warm or
	 * cold reset.
	 * -----------------------------------------------------
	 */

func bl1_entrypoint
/* ---------------------------------------------------------------------
* If the reset address is programmable then bl1_entrypoint() is
* executed only on the cold boot path. Therefore, we can skip the warm
* boot mailbox mechanism.
* ---------------------------------------------------------------------
*/
	el3_entrypoint_common					\
		_set_endian=1					\
		_warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS	\
		_secondary_cold_boot=!COLD_BOOT_SINGLE_CPU	\
		_init_memory=1					\
		_init_c_runtime=1				\
		_exception_vectors=bl1_vector_table

	/* -----------------------------------------------------
	 * Perform early platform setup & platform
	 * specific early arch. setup e.g. mmu setup
	 * -----------------------------------------------------
	 */
	bl	bl1_early_platform_setup
	bl	bl1_plat_arch_setup

	/* -----------------------------------------------------
	 * Jump to main function.
	 * -----------------------------------------------------
	 */
	bl	bl1_main

	/* -----------------------------------------------------
	 * Jump to next image.
	 * -----------------------------------------------------
	 */

	/*
	 * MMU needs to be disabled because both BL1 and BL2 execute
	 * in PL1, and therefore share the same address space.
	 * BL2 will initialize the address space according to its
	 * own requirement.
	 */
	bl	disable_mmu_icache_secure
	stcopr	r0, TLBIALL
	dsb	sy
	isb

	/* Get the cpu_context for next BL image */
	bl	cm_get_next_context

	/* Restore the SCR */
	ldr	r2, [r0, #CTX_REGS_OFFSET + CTX_SCR]
	stcopr	r2, SCR
	isb

	/*
	 * Get the smc_context for next BL image,
	 * program the gp/system registers and exit
	 * secure monitor mode
	 */
	bl	smc_get_next_ctx
	smcc_restore_gp_mode_regs
	eret
endfunc bl1_entrypoint