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44 lines
978 B
44 lines
978 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* arch/arm/mach-spear13XX/headsmp.S |
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* |
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* Picked from realview |
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* Copyright (c) 2012 ST Microelectronics Limited |
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* Shiraz Hashim <shiraz.linux.kernel@gmail.com> |
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*/ |
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#include <linux/linkage.h> |
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#include <linux/init.h> |
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__INIT |
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/* |
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* spear13xx specific entry point for secondary CPUs. This provides |
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* a "holding pen" into which all secondary cores are held until we're |
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* ready for them to initialise. |
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*/ |
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ENTRY(spear13xx_secondary_startup) |
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mrc p15, 0, r0, c0, c0, 5 |
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and r0, r0, #15 |
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adr r4, 1f |
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ldmia r4, {r5, r6} |
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sub r4, r4, r5 |
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add r6, r6, r4 |
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pen: ldr r7, [r6] |
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cmp r7, r0 |
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bne pen |
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/* re-enable coherency */ |
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mrc p15, 0, r0, c1, c0, 1 |
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orr r0, r0, #(1 << 6) | (1 << 0) |
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mcr p15, 0, r0, c1, c0, 1 |
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/* |
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* we've been released from the holding pen: secondary_stack |
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* should now contain the SVC stack for this core |
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*/ |
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b secondary_startup |
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.align |
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1: .long . |
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.long spear_pen_release |
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ENDPROC(spear13xx_secondary_startup)
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