/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * arch/arm/mach-spear13XX/headsmp.S
 *
 * Picked from realview
 * Copyright (c) 2012 ST Microelectronics Limited
 * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
 */

#include <linux/linkage.h>
#include <linux/init.h>

        __INIT

/*
 * spear13xx specific entry point for secondary CPUs. This provides
 * a "holding pen" into which all secondary cores are held until we're
 * ready for them to initialise.
 */
ENTRY(spear13xx_secondary_startup)
        mrc     p15, 0, r0, c0, c0, 5
        and     r0, r0, #15
        adr     r4, 1f
        ldmia   r4, {r5, r6}
        sub     r4, r4, r5
        add     r6, r6, r4
pen:    ldr     r7, [r6]
        cmp     r7, r0
        bne     pen

        /* re-enable coherency */
        mrc     p15, 0, r0, c1, c0, 1
        orr     r0, r0, #(1 << 6) | (1 << 0)
        mcr     p15, 0, r0, c1, c0, 1
        /*
         * we've been released from the holding pen: secondary_stack
         * should now contain the SVC stack for this core
         */
        b       secondary_startup

        .align
1:      .long   .
        .long   spear_pen_release
ENDPROC(spear13xx_secondary_startup)