2 * Author: Xianghua Xiao <x.xiao@freescale.com>
3 * Zhang Wei <wei.zhang@freescale.com>
5 * Copyright 2006 Freescale Semiconductor Inc.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 #include <linux/config.h>
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
19 #include <asm/pgtable.h>
21 #include <asm/pci-bridge.h>
22 #include <asm-powerpc/mpic.h>
23 #include <asm/mpc86xx.h>
24 #include <asm/cacheflush.h>
26 #include <sysdev/fsl_soc.h>
30 extern void __secondary_start_mpc86xx(void);
31 extern unsigned long __secondary_hold_acknowledge;
35 smp_86xx_release_core(int nr)
38 unsigned long vaddr, pcr;
40 if (nr < 0 || nr >= NR_CPUS)
46 mcm_vaddr = ioremap(get_immrbase() + MPC86xx_MCM_OFFSET,
48 vaddr = (unsigned long)mcm_vaddr + MCM_PORT_CONFIG_OFFSET;
49 pcr = in_be32((volatile unsigned *)vaddr);
50 pcr |= 1 << (nr + 24);
51 out_be32((volatile unsigned *)vaddr, pcr);
56 smp_86xx_kick_cpu(int nr)
58 unsigned int save_vector;
59 unsigned long target, flags;
61 volatile unsigned int *vector
62 = (volatile unsigned int *)(KERNELBASE + 0x100);
64 if (nr < 0 || nr >= NR_CPUS)
67 pr_debug("smp_86xx_kick_cpu: kick CPU #%d\n", nr);
69 local_irq_save(flags);
72 /* Save reset vector */
73 save_vector = *vector;
75 /* Setup fake reset vector to call __secondary_start_mpc86xx. */
76 target = (unsigned long) __secondary_start_mpc86xx;
77 create_branch((unsigned long)vector, target, BRANCH_SET_LINK);
80 smp_86xx_release_core(nr);
82 /* Wait a bit for the CPU to take the exception. */
83 while ((__secondary_hold_acknowledge != nr) && (n++, n < 1000))
86 /* Restore the exception vector */
87 *vector = save_vector;
88 flush_icache_range((unsigned long) vector, (unsigned long) vector + 4);
90 local_irq_restore(flags);
92 pr_debug("wait CPU #%d for %d msecs.\n", nr, n);
97 smp_86xx_setup_cpu(int cpu_nr)
99 mpic_setup_this_cpu();
103 struct smp_ops_t smp_86xx_ops = {
104 .message_pass = smp_mpic_message_pass,
105 .probe = smp_mpic_probe,
106 .kick_cpu = smp_86xx_kick_cpu,
107 .setup_cpu = smp_86xx_setup_cpu,
108 .take_timebase = smp_generic_take_timebase,
109 .give_timebase = smp_generic_give_timebase,
114 mpc86xx_smp_init(void)
116 smp_ops = &smp_86xx_ops;