| Barry Song | 4898de3 | 2012-12-20 19:37:32 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Entry of the second core for CSR Marco dual-core SMP SoCs |
| 3 | * |
| 4 | * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. |
| 5 | * |
| 6 | * Licensed under GPLv2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/linkage.h> |
| 10 | #include <linux/init.h> |
| 11 | |
| Barry Song | 4898de3 | 2012-12-20 19:37:32 +0800 | [diff] [blame] | 12 | /* |
| Barry Song | 4898de3 | 2012-12-20 19:37:32 +0800 | [diff] [blame] | 13 | * SIRFSOC specific entry point for secondary CPUs. This provides |
| 14 | * a "holding pen" into which all secondary cores are held until we're |
| 15 | * ready for them to initialise. |
| 16 | */ |
| 17 | ENTRY(sirfsoc_secondary_startup) |
| Barry Song | 4898de3 | 2012-12-20 19:37:32 +0800 | [diff] [blame] | 18 | mrc p15, 0, r0, c0, c0, 5 |
| 19 | and r0, r0, #15 |
| 20 | adr r4, 1f |
| 21 | ldmia r4, {r5, r6} |
| 22 | sub r4, r4, r5 |
| 23 | add r6, r6, r4 |
| 24 | pen: ldr r7, [r6] |
| 25 | cmp r7, r0 |
| 26 | bne pen |
| 27 | |
| 28 | /* |
| 29 | * we've been released from the holding pen: secondary_stack |
| 30 | * should now contain the SVC stack for this core |
| 31 | */ |
| 32 | b secondary_startup |
| 33 | ENDPROC(sirfsoc_secondary_startup) |
| 34 | |
| 35 | .align |
| 36 | 1: .long . |
| 37 | .long pen_release |