projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c51ed4f MD |
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 | */ | |
| 1c51ed4f | 13 | #include <linux/init.h> |
| 8b438bcb MD |
14 | #include <linux/linkage.h> |
| 15 | #include <linux/threads.h> | |
| 6ebbf2ce | 16 | #include <asm/assembler.h> |
| 6155f77d | 17 | #include <asm/memory.h> |
| 1c51ed4f | 18 | |
| 1c51ed4f MD |
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 | */ | |
| c1d7e2e8 | 24 | .arm |
| 1c51ed4f | 25 | .align 12 |
| ebe72ab9 MD |
26 | ENTRY(shmobile_boot_vector) |
| 27 | ldr r0, 2f | |
| c1d7e2e8 TK |
28 | ldr r1, 1f |
| 29 | bx r1 | |
| 30 | ||
| ebe72ab9 MD |
31 | ENDPROC(shmobile_boot_vector) |
| 32 | ||
| 0b933cb3 | 33 | .align 2 |
| ebe72ab9 MD |
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 | |
| a84a5ab7 MD |
40 | .globl shmobile_boot_size |
| 41 | shmobile_boot_size: | |
| 42 | .long . - shmobile_boot_vector | |
| cc61591e MD |
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 | |
| 8b438bcb | 68 | cmp r1, #NR_CPUS |
| cc61591e MD |
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] | |
| 6ebbf2ce | 75 | ret r9 |
| cc61591e MD |
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: | |
| 8b438bcb | 85 | 1: .space NR_CPUS * 4 |
| cc61591e MD |
86 | .globl shmobile_smp_fn |
| 87 | shmobile_smp_fn: | |
| 8b438bcb | 88 | 2: .space NR_CPUS * 4 |
| cc61591e MD |
89 | .globl shmobile_smp_arg |
| 90 | shmobile_smp_arg: | |
| 8b438bcb | 91 | 3: .space NR_CPUS * 4 |