platform_up_stack.S

/*
 * Copyright (c) 2016-2017, 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
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 */

#include <arch.h>
#include <asm_macros.S>
#include <platform_def.h>

	.weak	plat_get_my_stack
	.weak	plat_set_my_stack

	/* -----------------------------------------------------
	 * unsigned long plat_get_my_stack ()
	 *
	 * For cold-boot BL images, only the primary CPU needs
	 * a stack. This function returns the stack pointer for
	 * a stack allocated in normal memory.
	 * -----------------------------------------------------
	 */
func plat_get_my_stack
	get_up_stack platform_normal_stacks, PLATFORM_STACK_SIZE
	bx	lr
endfunc	plat_get_my_stack

	/* -----------------------------------------------------
	 * void plat_set_my_stack ()
	 *
	 * For cold-boot BL images, only the primary CPU needs
	 * a stack. This function sets the stack pointer to a
	 * stack allocated in normal memory.
	 * -----------------------------------------------------
	 */
func plat_set_my_stack
	get_up_stack platform_normal_stacks, PLATFORM_STACK_SIZE
	mov	sp, r0
	bx	lr
endfunc plat_set_my_stack

	/* -----------------------------------------------------
	 * Per-cpu stacks in normal memory. Each cpu gets a
	 * stack of PLATFORM_STACK_SIZE bytes.
	 * -----------------------------------------------------
	 */
declare_stack platform_normal_stacks, tzfw_normal_stacks, \
		PLATFORM_STACK_SIZE, 1, CACHE_WRITEBACK_GRANULE