| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* |
| 3 | * Entry of the second core for CSR Marco dual-core SMP SoCs |
| 4 | * |
| 5 | * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/linkage.h> |
| 9 | #include <linux/init.h> |
| 10 | |
| 11 | /* |
| 12 | * SIRFSOC specific entry point for secondary CPUs. This provides |
| 13 | * a "holding pen" into which all secondary cores are held until we're |
| 14 | * ready for them to initialise. |
| 15 | */ |
| 16 | ENTRY(sirfsoc_secondary_startup) |
| 17 | mrc p15, 0, r0, c0, c0, 5 |
| 18 | and r0, r0, #15 |
| 19 | adr r4, 1f |
| 20 | ldmia r4, {r5, r6} |
| 21 | sub r4, r4, r5 |
| 22 | add r6, r6, r4 |
| 23 | pen: ldr r7, [r6] |
| 24 | cmp r7, r0 |
| 25 | bne pen |
| 26 | |
| 27 | /* |
| 28 | * we've been released from the holding pen: secondary_stack |
| 29 | * should now contain the SVC stack for this core |
| 30 | */ |
| 31 | b secondary_startup |
| 32 | ENDPROC(sirfsoc_secondary_startup) |
| 33 | |
| 34 | .align |
| 35 | 1: .long . |
| 36 | .long prima2_pen_release |