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/* * SMP support for R-Mobile / SH-Mobile * * Copyright (C) 2010 Magnus Damm * Copyright (C) 2010 Takashi Yoshii * * Based on vexpress, Copyright (c) 2003 ARM Limited, All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/linkage.h> #include <linux/init.h> #include <asm/memory.h> ENTRY(shmobile_invalidate_start) bl v7_invalidate_l1 b secondary_startup ENDPROC(shmobile_invalidate_start) /* * Reset vector for secondary CPUs. * This will be mapped at address 0 by SBAR register. * We need _long_ jump to the physical address. */ .arm .align 12 ENTRY(shmobile_boot_vector) ldr r0, 2f ldr r1, 1f bx r1 ENDPROC(shmobile_boot_vector) .align 2 .globl shmobile_boot_fn shmobile_boot_fn: 1: .space 4 .globl shmobile_boot_arg shmobile_boot_arg: 2: .space 4 /* * Per-CPU SMP boot function/argument selection code based on MPIDR */ ENTRY(shmobile_smp_boot) @ r0 = MPIDR_HWID_BITMASK mrc p15, 0, r1, c0, c0, 5 @ r1 = MPIDR and r0, r1, r0 @ r0 = cpu_logical_map() value mov r1, #0 @ r1 = CPU index adr r5, 1f @ array of per-cpu mpidr values adr r6, 2f @ array of per-cpu functions adr r7, 3f @ array of per-cpu arguments shmobile_smp_boot_find_mpidr: ldr r8, [r5, r1, lsl #2] cmp r8, r0 bne shmobile_smp_boot_next ldr r9, [r6, r1, lsl #2] cmp r9, #0 bne shmobile_smp_boot_found shmobile_smp_boot_next: add r1, r1, #1 cmp r1, #CONFIG_NR_CPUS blo shmobile_smp_boot_find_mpidr b shmobile_smp_sleep shmobile_smp_boot_found: ldr r0, [r7, r1, lsl #2] mov pc, r9 ENDPROC(shmobile_smp_boot) ENTRY(shmobile_smp_sleep) wfi b shmobile_smp_boot ENDPROC(shmobile_smp_sleep) .globl shmobile_smp_mpidr shmobile_smp_mpidr: 1: .space CONFIG_NR_CPUS * 4 .globl shmobile_smp_fn shmobile_smp_fn: 2: .space CONFIG_NR_CPUS * 4 .globl shmobile_smp_arg shmobile_smp_arg: 3: .space CONFIG_NR_CPUS * 4 |