zynqmp_helpers.S

/*
 * Copyright (c) 2013-2016, 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
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 */

#include <asm_macros.S>
#include <gicv2.h>
#include <platform_def.h>

	.globl	plat_secondary_cold_boot_setup
	.globl	plat_is_my_cpu_primary

	/* -----------------------------------------------------
	 * void plat_secondary_cold_boot_setup (void);
	 *
	 * This function performs any platform specific actions
	 * needed for a secondary cpu after a cold reset e.g
	 * mark the cpu's presence, mechanism to place it in a
	 * holding pen etc.
	 * TODO: Should we read the PSYS register to make sure
	 * that the request has gone through.
	 * -----------------------------------------------------
	 */
func plat_secondary_cold_boot_setup
	mrs	x0, mpidr_el1

	/* Deactivate the gic cpu interface */
	ldr	x1, =BASE_GICC_BASE
	mov	w0, #(IRQ_BYP_DIS_GRP1 | FIQ_BYP_DIS_GRP1)
	orr	w0, w0, #(IRQ_BYP_DIS_GRP0 | FIQ_BYP_DIS_GRP0)
	str	w0, [x1, #GICC_CTLR]

	/*
	 * There is no sane reason to come out of this wfi. This
	 * cpu will be powered on and reset by the cpu_on pm api
	 */
	dsb	sy
1:
	no_ret	plat_panic_handler
endfunc plat_secondary_cold_boot_setup

func plat_is_my_cpu_primary
	mov	x9, x30
	bl	plat_my_core_pos
	cmp	x0, #ZYNQMP_PRIMARY_CPU
	cset	x0, eq
	ret	x9
endfunc plat_is_my_cpu_primary