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| /* 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)
|
|
