/* * arch/arm/mach-spear13XX/headsmp.S * * Picked from realview * Copyright (c) 2012 ST Microelectronics Limited * Shiraz Hashim <shiraz.linux.kernel@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #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 pen_release ENDPROC(spear13xx_secondary_startup)