Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6-microblaze.git] / arch / arm / mach-shmobile / smp-sh73a0.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * SMP support for R-Mobile / SH-Mobile - sh73a0 portion
4  *
5  * Copyright (C) 2010  Magnus Damm
6  * Copyright (C) 2010  Takashi Yoshii
7  */
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/smp.h>
11 #include <linux/io.h>
12 #include <linux/delay.h>
13
14 #include <asm/smp_plat.h>
15
16 #include "common.h"
17 #include "sh73a0.h"
18
19 #define WUPCR           IOMEM(0xe6151010)
20 #define SRESCR          IOMEM(0xe6151018)
21 #define PSTR            IOMEM(0xe6151040)
22 #define SBAR            IOMEM(0xe6180020)
23 #define APARMBAREA      IOMEM(0xe6f10020)
24
25 #define SH73A0_SCU_BASE 0xf0000000
26
27 static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
28 {
29         unsigned int lcpu = cpu_logical_map(cpu);
30
31         if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3)
32                 __raw_writel(1 << lcpu, WUPCR); /* wake up */
33         else
34                 __raw_writel(1 << lcpu, SRESCR);        /* reset */
35
36         return 0;
37 }
38
39 static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
40 {
41         /* Map the reset vector (in headsmp.S) */
42         __raw_writel(0, APARMBAREA);      /* 4k */
43         __raw_writel(__pa(shmobile_boot_vector), SBAR);
44
45         /* setup sh73a0 specific SCU bits */
46         shmobile_smp_scu_prepare_cpus(SH73A0_SCU_BASE, max_cpus);
47 }
48
49 const struct smp_operations sh73a0_smp_ops __initconst = {
50         .smp_prepare_cpus       = sh73a0_smp_prepare_cpus,
51         .smp_boot_secondary     = sh73a0_boot_secondary,
52 #ifdef CONFIG_HOTPLUG_CPU
53         .cpu_can_disable        = shmobile_smp_cpu_can_disable,
54         .cpu_die                = shmobile_smp_scu_cpu_die,
55         .cpu_kill               = shmobile_smp_scu_cpu_kill,
56 #endif
57 };