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/stddef.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
18 #include <asm/code-patching.h>
20 #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)
37 __be32 __iomem *mcm_vaddr;
40 if (nr < 0 || nr >= NR_CPUS)
46 mcm_vaddr = ioremap(get_immrbase() + MPC86xx_MCM_OFFSET,
48 pcr = in_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2));
49 pcr |= 1 << (nr + 24);
50 out_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2), pcr);
55 smp_86xx_kick_cpu(int nr)
57 unsigned int save_vector;
58 unsigned long target, flags;
60 unsigned int *vector = (unsigned int *)(KERNELBASE + 0x100);
62 if (nr < 0 || nr >= NR_CPUS)
65 pr_debug("smp_86xx_kick_cpu: kick CPU #%d\n", nr);
67 local_irq_save(flags);
69 /* Save reset vector */
70 save_vector = *vector;
72 /* Setup fake reset vector to call __secondary_start_mpc86xx. */
73 target = (unsigned long) __secondary_start_mpc86xx;
74 patch_branch(vector, target, BRANCH_SET_LINK);
77 smp_86xx_release_core(nr);
79 /* Wait a bit for the CPU to take the exception. */
80 while ((__secondary_hold_acknowledge != nr) && (n++, n < 1000))
83 /* Restore the exception vector */
84 *vector = save_vector;
85 flush_icache_range((unsigned long) vector, (unsigned long) vector + 4);
87 local_irq_restore(flags);
89 pr_debug("wait CPU #%d for %d msecs.\n", nr, n);
94 smp_86xx_setup_cpu(int cpu_nr)
96 mpic_setup_this_cpu();
100 struct smp_ops_t smp_86xx_ops = {
101 .message_pass = smp_mpic_message_pass,
102 .probe = smp_mpic_probe,
103 .kick_cpu = smp_86xx_kick_cpu,
104 .setup_cpu = smp_86xx_setup_cpu,
105 .take_timebase = smp_generic_take_timebase,
106 .give_timebase = smp_generic_give_timebase,
111 mpc86xx_smp_init(void)
113 smp_ops = &smp_86xx_ops;