| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (c) 2003 ARM Limited |
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| 4 | * All Rights Reserved |
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| 5 | */ |
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| 6 | #include <linux/linkage.h> |
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| 7 | #include <linux/init.h> |
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| 8 | #include <asm/assembler.h> |
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| 9 | |
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| 10 | /* |
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| 11 | * Realview/Versatile Express specific entry point for secondary CPUs. |
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| 12 | * This provides a "holding pen" into which all secondary cores are held |
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| 13 | * until we're ready for them to initialise. |
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| 14 | */ |
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| 15 | ENTRY(versatile_secondary_startup) |
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| 16 | ARM_BE8(setend be) |
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| 17 | mrc p15, 0, r0, c0, c0, 5 |
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| 18 | bic r0, #0xff000000 |
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| 19 | adr r4, 1f |
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| 20 | ldmia r4, {r5, r6} |
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| 21 | sub r4, r4, r5 |
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| 22 | add r6, r6, r4 |
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| 23 | pen: ldr r7, [r6] |
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| 24 | cmp r7, r0 |
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| 25 | bne pen |
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| 26 | |
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| 27 | /* |
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| 28 | * we've been released from the holding pen: secondary_stack |
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| 29 | * should now contain the SVC stack for this core |
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| 30 | */ |
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| 31 | b secondary_startup |
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| 32 | |
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| 33 | .align |
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| 34 | 1: .long . |
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| 35 | .long versatile_cpu_release |
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| 36 | ENDPROC(versatile_secondary_startup) |
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| 37 | |
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