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/init.h> 14#include <linux/linkage.h> 15#include <linux/threads.h> 16#include <asm/assembler.h> 17#include <asm/memory.h> 18 19#ifdef CONFIG_SMP 20ENTRY(shmobile_invalidate_start) 21 bl v7_invalidate_l1 22 b secondary_startup 23ENDPROC(shmobile_invalidate_start) 24#endif 25 26/* 27 * Reset vector for secondary CPUs. 28 * This will be mapped at address 0 by SBAR register. 29 * We need _long_ jump to the physical address. 30 */ 31 .arm 32 .align 12 33ENTRY(shmobile_boot_vector) 34 ldr r0, 2f 35 ldr r1, 1f 36 bx r1 37 38ENDPROC(shmobile_boot_vector) 39 40 .align 2 41 .globl shmobile_boot_fn 42shmobile_boot_fn: 431: .space 4 44 .globl shmobile_boot_arg 45shmobile_boot_arg: 462: .space 4 47 .globl shmobile_boot_size 48shmobile_boot_size: 49 .long . - shmobile_boot_vector 50 51/* 52 * Per-CPU SMP boot function/argument selection code based on MPIDR 53 */ 54 55ENTRY(shmobile_smp_boot) 56 @ r0 = MPIDR_HWID_BITMASK 57 mrc p15, 0, r1, c0, c0, 5 @ r1 = MPIDR 58 and r0, r1, r0 @ r0 = cpu_logical_map() value 59 mov r1, #0 @ r1 = CPU index 60 adr r5, 1f @ array of per-cpu mpidr values 61 adr r6, 2f @ array of per-cpu functions 62 adr r7, 3f @ array of per-cpu arguments 63 64shmobile_smp_boot_find_mpidr: 65 ldr r8, [r5, r1, lsl #2] 66 cmp r8, r0 67 bne shmobile_smp_boot_next 68 69 ldr r9, [r6, r1, lsl #2] 70 cmp r9, #0 71 bne shmobile_smp_boot_found 72 73shmobile_smp_boot_next: 74 add r1, r1, #1 75 cmp r1, #NR_CPUS 76 blo shmobile_smp_boot_find_mpidr 77 78 b shmobile_smp_sleep 79 80shmobile_smp_boot_found: 81 ldr r0, [r7, r1, lsl #2] 82 ret r9 83ENDPROC(shmobile_smp_boot) 84 85ENTRY(shmobile_smp_sleep) 86 wfi 87 b shmobile_smp_boot 88ENDPROC(shmobile_smp_sleep) 89 90 .globl shmobile_smp_mpidr 91shmobile_smp_mpidr: 921: .space NR_CPUS * 4 93 .globl shmobile_smp_fn 94shmobile_smp_fn: 952: .space NR_CPUS * 4 96 .globl shmobile_smp_arg 97shmobile_smp_arg: 983: .space NR_CPUS * 4 99