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 */ 13#include <linux/linkage.h> 14#include <linux/init.h> 15#include <asm/memory.h> 16 17ENTRY(shmobile_invalidate_start) 18 bl v7_invalidate_l1 19 b secondary_startup 20ENDPROC(shmobile_invalidate_start) 21 22/* 23 * Reset vector for secondary CPUs. 24 * This will be mapped at address 0 by SBAR register. 25 * We need _long_ jump to the physical address. 26 */ 27 .arm 28 .align 12 29ENTRY(shmobile_boot_vector) 30 ldr r0, 2f 31 ldr r1, 1f 32 bx r1 33 34ENDPROC(shmobile_boot_vector) 35 36 .align 2 37 .globl shmobile_boot_fn 38shmobile_boot_fn: 391: .space 4 40 .globl shmobile_boot_arg 41shmobile_boot_arg: 422: .space 4 43 .globl shmobile_boot_size 44shmobile_boot_size: 45 .long . - shmobile_boot_vector 46 47/* 48 * Per-CPU SMP boot function/argument selection code based on MPIDR 49 */ 50 51ENTRY(shmobile_smp_boot) 52 @ r0 = MPIDR_HWID_BITMASK 53 mrc p15, 0, r1, c0, c0, 5 @ r1 = MPIDR 54 and r0, r1, r0 @ r0 = cpu_logical_map() value 55 mov r1, #0 @ r1 = CPU index 56 adr r5, 1f @ array of per-cpu mpidr values 57 adr r6, 2f @ array of per-cpu functions 58 adr r7, 3f @ array of per-cpu arguments 59 60shmobile_smp_boot_find_mpidr: 61 ldr r8, [r5, r1, lsl #2] 62 cmp r8, r0 63 bne shmobile_smp_boot_next 64 65 ldr r9, [r6, r1, lsl #2] 66 cmp r9, #0 67 bne shmobile_smp_boot_found 68 69shmobile_smp_boot_next: 70 add r1, r1, #1 71 cmp r1, #CONFIG_NR_CPUS 72 blo shmobile_smp_boot_find_mpidr 73 74 b shmobile_smp_sleep 75 76shmobile_smp_boot_found: 77 ldr r0, [r7, r1, lsl #2] 78 mov pc, r9 79ENDPROC(shmobile_smp_boot) 80 81ENTRY(shmobile_smp_sleep) 82 wfi 83 b shmobile_smp_boot 84ENDPROC(shmobile_smp_sleep) 85 86 .globl shmobile_smp_mpidr 87shmobile_smp_mpidr: 881: .space CONFIG_NR_CPUS * 4 89 .globl shmobile_smp_fn 90shmobile_smp_fn: 912: .space CONFIG_NR_CPUS * 4 92 .globl shmobile_smp_arg 93shmobile_smp_arg: 943: .space CONFIG_NR_CPUS * 4 95