| Magnus Damm | 1c51ed4 | 2010-12-14 16:56:55 +0900 | [diff] [blame] | 1 | /* |
| 2 | * SMP support for R-Mobile / SH-Mobile |
| 3 | * |
| 4 | * Copyright (C) 2010 Magnus Damm |
| 5 | * Copyright (C) 2010 Takashi Yoshii |
| 6 | * |
| 7 | * Based on vexpress, Copyright (c) 2003 ARM Limited, All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| Magnus Damm | 1c51ed4 | 2010-12-14 16:56:55 +0900 | [diff] [blame] | 13 | #include <linux/init.h> |
| Magnus Damm | 8b438bc | 2014-06-06 16:20:10 +0900 | [diff] [blame] | 14 | #include <linux/linkage.h> |
| 15 | #include <linux/threads.h> |
| Russell King | 6ebbf2c | 2014-06-30 16:29:12 +0100 | [diff] [blame] | 16 | #include <asm/assembler.h> |
| Magnus Damm | 6155f77 | 2010-12-20 11:04:50 +0000 | [diff] [blame] | 17 | #include <asm/memory.h> |
| Magnus Damm | 1c51ed4 | 2010-12-14 16:56:55 +0900 | [diff] [blame] | 18 | |
| Magnus Damm | 1c51ed4 | 2010-12-14 16:56:55 +0900 | [diff] [blame] | 19 | /* |
| 20 | * Reset vector for secondary CPUs. |
| 21 | * This will be mapped at address 0 by SBAR register. |
| 22 | * We need _long_ jump to the physical address. |
| 23 | */ |
| Tetsuyuki Kobayashi | c1d7e2e | 2013-07-10 10:56:36 +0900 | [diff] [blame] | 24 | .arm |
| Magnus Damm | 1c51ed4 | 2010-12-14 16:56:55 +0900 | [diff] [blame] | 25 | .align 12 |
| Magnus Damm | ebe72ab | 2013-06-10 18:19:36 +0900 | [diff] [blame] | 26 | ENTRY(shmobile_boot_vector) |
| 27 | ldr r0, 2f |
| Tetsuyuki Kobayashi | c1d7e2e | 2013-07-10 10:56:36 +0900 | [diff] [blame] | 28 | ldr r1, 1f |
| 29 | bx r1 |
| 30 | |
| Magnus Damm | ebe72ab | 2013-06-10 18:19:36 +0900 | [diff] [blame] | 31 | ENDPROC(shmobile_boot_vector) |
| 32 | |
| Tetsuyuki Kobayashi | 0b933cb | 2013-07-10 10:56:37 +0900 | [diff] [blame] | 33 | .align 2 |
| Magnus Damm | ebe72ab | 2013-06-10 18:19:36 +0900 | [diff] [blame] | 34 | .globl shmobile_boot_fn |
| 35 | shmobile_boot_fn: |
| 36 | 1: .space 4 |
| 37 | .globl shmobile_boot_arg |
| 38 | shmobile_boot_arg: |
| 39 | 2: .space 4 |
| Magnus Damm | a84a5ab | 2013-08-08 07:14:07 +0900 | [diff] [blame] | 40 | .globl shmobile_boot_size |
| 41 | shmobile_boot_size: |
| 42 | .long . - shmobile_boot_vector |
| Magnus Damm | cc61591 | 2013-08-01 03:38:18 +0900 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * Per-CPU SMP boot function/argument selection code based on MPIDR |
| 46 | */ |
| 47 | |
| 48 | ENTRY(shmobile_smp_boot) |
| 49 | @ r0 = MPIDR_HWID_BITMASK |
| 50 | mrc p15, 0, r1, c0, c0, 5 @ r1 = MPIDR |
| 51 | and r0, r1, r0 @ r0 = cpu_logical_map() value |
| 52 | mov r1, #0 @ r1 = CPU index |
| 53 | adr r5, 1f @ array of per-cpu mpidr values |
| 54 | adr r6, 2f @ array of per-cpu functions |
| 55 | adr r7, 3f @ array of per-cpu arguments |
| 56 | |
| 57 | shmobile_smp_boot_find_mpidr: |
| 58 | ldr r8, [r5, r1, lsl #2] |
| 59 | cmp r8, r0 |
| 60 | bne shmobile_smp_boot_next |
| 61 | |
| 62 | ldr r9, [r6, r1, lsl #2] |
| 63 | cmp r9, #0 |
| 64 | bne shmobile_smp_boot_found |
| 65 | |
| 66 | shmobile_smp_boot_next: |
| 67 | add r1, r1, #1 |
| Magnus Damm | 8b438bc | 2014-06-06 16:20:10 +0900 | [diff] [blame] | 68 | cmp r1, #NR_CPUS |
| Magnus Damm | cc61591 | 2013-08-01 03:38:18 +0900 | [diff] [blame] | 69 | blo shmobile_smp_boot_find_mpidr |
| 70 | |
| 71 | b shmobile_smp_sleep |
| 72 | |
| 73 | shmobile_smp_boot_found: |
| 74 | ldr r0, [r7, r1, lsl #2] |
| Russell King | 6ebbf2c | 2014-06-30 16:29:12 +0100 | [diff] [blame] | 75 | ret r9 |
| Magnus Damm | cc61591 | 2013-08-01 03:38:18 +0900 | [diff] [blame] | 76 | ENDPROC(shmobile_smp_boot) |
| 77 | |
| 78 | ENTRY(shmobile_smp_sleep) |
| 79 | wfi |
| 80 | b shmobile_smp_boot |
| 81 | ENDPROC(shmobile_smp_sleep) |
| 82 | |
| 83 | .globl shmobile_smp_mpidr |
| 84 | shmobile_smp_mpidr: |
| Magnus Damm | 8b438bc | 2014-06-06 16:20:10 +0900 | [diff] [blame] | 85 | 1: .space NR_CPUS * 4 |
| Magnus Damm | cc61591 | 2013-08-01 03:38:18 +0900 | [diff] [blame] | 86 | .globl shmobile_smp_fn |
| 87 | shmobile_smp_fn: |
| Magnus Damm | 8b438bc | 2014-06-06 16:20:10 +0900 | [diff] [blame] | 88 | 2: .space NR_CPUS * 4 |
| Magnus Damm | cc61591 | 2013-08-01 03:38:18 +0900 | [diff] [blame] | 89 | .globl shmobile_smp_arg |
| 90 | shmobile_smp_arg: |
| Magnus Damm | 8b438bc | 2014-06-06 16:20:10 +0900 | [diff] [blame] | 91 | 3: .space NR_CPUS * 4 |