powerpc: Delete __cpuinit usage from all users
[linux/fpc-iii.git] / arch / arm / mach-shmobile / smp-sh73a0.c
blob496592b6c763979484b58e43212cb55c4dbfdbcc
1 /*
2 * SMP support for R-Mobile / SH-Mobile - sh73a0 portion
4 * Copyright (C) 2010 Magnus Damm
5 * Copyright (C) 2010 Takashi Yoshii
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/smp.h>
23 #include <linux/spinlock.h>
24 #include <linux/io.h>
25 #include <linux/delay.h>
26 #include <mach/common.h>
27 #include <asm/cacheflush.h>
28 #include <asm/smp_plat.h>
29 #include <mach/sh73a0.h>
30 #include <asm/smp_scu.h>
31 #include <asm/smp_twd.h>
33 #define WUPCR IOMEM(0xe6151010)
34 #define SRESCR IOMEM(0xe6151018)
35 #define PSTR IOMEM(0xe6151040)
36 #define SBAR IOMEM(0xe6180020)
37 #define APARMBAREA IOMEM(0xe6f10020)
39 #define PSTR_SHUTDOWN_MODE 3
41 #define SH73A0_SCU_BASE 0xf0000000
43 #ifdef CONFIG_HAVE_ARM_TWD
44 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, SH73A0_SCU_BASE + 0x600, 29);
45 void __init sh73a0_register_twd(void)
47 twd_local_timer_register(&twd_local_timer);
49 #endif
51 static int __cpuinit sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
53 cpu = cpu_logical_map(cpu);
55 if (((__raw_readl(PSTR) >> (4 * cpu)) & 3) == 3)
56 __raw_writel(1 << cpu, WUPCR); /* wake up */
57 else
58 __raw_writel(1 << cpu, SRESCR); /* reset */
60 return 0;
63 static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
65 scu_enable(shmobile_scu_base);
67 /* Map the reset vector (in headsmp-scu.S) */
68 __raw_writel(0, APARMBAREA); /* 4k */
69 __raw_writel(__pa(shmobile_secondary_vector_scu), SBAR);
71 /* enable cache coherency on booting CPU */
72 scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
75 static void __init sh73a0_smp_init_cpus(void)
77 /* setup sh73a0 specific SCU base */
78 shmobile_scu_base = IOMEM(SH73A0_SCU_BASE);
80 shmobile_smp_init_cpus(scu_get_core_count(shmobile_scu_base));
83 #ifdef CONFIG_HOTPLUG_CPU
84 static int sh73a0_cpu_kill(unsigned int cpu)
87 int k;
88 u32 pstr;
91 * wait until the power status register confirms the shutdown of the
92 * offline target
94 for (k = 0; k < 1000; k++) {
95 pstr = (__raw_readl(PSTR) >> (4 * cpu)) & 3;
96 if (pstr == PSTR_SHUTDOWN_MODE)
97 return 1;
99 mdelay(1);
102 return 0;
105 static void sh73a0_cpu_die(unsigned int cpu)
107 /* Set power off mode. This takes the CPU out of the MP cluster */
108 scu_power_mode(shmobile_scu_base, SCU_PM_POWEROFF);
110 /* Enter shutdown mode */
111 cpu_do_idle();
114 static int sh73a0_cpu_disable(unsigned int cpu)
116 return 0; /* CPU0 and CPU1 supported */
118 #endif /* CONFIG_HOTPLUG_CPU */
120 struct smp_operations sh73a0_smp_ops __initdata = {
121 .smp_init_cpus = sh73a0_smp_init_cpus,
122 .smp_prepare_cpus = sh73a0_smp_prepare_cpus,
123 .smp_boot_secondary = sh73a0_boot_secondary,
124 #ifdef CONFIG_HOTPLUG_CPU
125 .cpu_kill = sh73a0_cpu_kill,
126 .cpu_die = sh73a0_cpu_die,
127 .cpu_disable = sh73a0_cpu_disable,
128 #endif