2 * SMP support for R-Mobile / SH-Mobile
4 * Copyright (C) 2010 Magnus Damm
5 * Copyright (C) 2010 Takashi Yoshii
7 * Based on vexpress, Copyright (c) 2003 ARM Limited, All Rights Reserved
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.
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>
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.
26 ENTRY(shmobile_boot_vector)
31 ENDPROC(shmobile_boot_vector)
34 .globl shmobile_boot_fn
37 .globl shmobile_boot_arg
40 .globl shmobile_boot_size
42 .long . - shmobile_boot_vector
45 * Per-CPU SMP boot function/argument selection code based on MPIDR
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
57 shmobile_smp_boot_find_mpidr:
58 ldr r8, [r5, r1, lsl #2]
60 bne shmobile_smp_boot_next
62 ldr r9, [r6, r1, lsl #2]
64 bne shmobile_smp_boot_found
66 shmobile_smp_boot_next:
69 blo shmobile_smp_boot_find_mpidr
73 shmobile_smp_boot_found:
74 ldr r0, [r7, r1, lsl #2]
76 ENDPROC(shmobile_smp_boot)
78 ENTRY(shmobile_smp_sleep)
81 ENDPROC(shmobile_smp_sleep)
83 .globl shmobile_smp_mpidr
86 .globl shmobile_smp_fn
89 .globl shmobile_smp_arg