2 * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
4 * This program is free software; you can distribute it and/or modify it
5 * under the terms of the GNU General Public License (Version 2) as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
19 * Simulator Platform-specific hooks for SMP operation
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/cpumask.h>
24 #include <linux/interrupt.h>
25 #include <linux/smp.h>
27 #include <asm/atomic.h>
29 #include <asm/processor.h>
30 #include <asm/system.h>
31 #include <asm/mmu_context.h>
32 #ifdef CONFIG_MIPS_MT_SMTC
33 #include <asm/smtc_ipi.h>
34 #endif /* CONFIG_MIPS_MT_SMTC */
36 /* VPE/SMP Prototype implements platform interfaces directly */
37 #if !defined(CONFIG_MIPS_MT_SMP)
40 * Cause the specified action to be performed on a targeted "CPU"
43 void core_send_ipi(int cpu, unsigned int action)
45 #ifdef CONFIG_MIPS_MT_SMTC
46 smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
47 #endif /* CONFIG_MIPS_MT_SMTC */
48 /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
53 * Platform "CPU" startup hook
56 void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
58 #ifdef CONFIG_MIPS_MT_SMTC
59 smtc_boot_secondary(cpu, idle);
60 #endif /* CONFIG_MIPS_MT_SMTC */
64 * Post-config but pre-boot cleanup entry point
67 void __cpuinit prom_init_secondary(void)
69 #ifdef CONFIG_MIPS_MT_SMTC
70 void smtc_init_secondary(void);
72 smtc_init_secondary();
73 #endif /* CONFIG_MIPS_MT_SMTC */
76 void plat_smp_setup(void)
78 #ifdef CONFIG_MIPS_MT_SMTC
79 if (read_c0_config3() & (1 << 2))
80 mipsmt_build_cpu_map(0);
81 #endif /* CONFIG_MIPS_MT_SMTC */
85 * Platform SMP pre-initialization
88 void plat_prepare_cpus(unsigned int max_cpus)
90 #ifdef CONFIG_MIPS_MT_SMTC
92 * As noted above, we can assume a single CPU for now
93 * but it may be multithreaded.
96 if (read_c0_config3() & (1 << 2)) {
97 mipsmt_prepare_cpus();
99 #endif /* CONFIG_MIPS_MT_SMTC */
103 * SMP initialization finalization entry point
106 void __cpuinit prom_smp_finish(void)
108 #ifdef CONFIG_MIPS_MT_SMTC
110 #endif /* CONFIG_MIPS_MT_SMTC */
114 * Hook for after all CPUs are online
117 void prom_cpus_done(void)
119 #ifdef CONFIG_MIPS_MT_SMTC
121 #endif /* CONFIG_MIPS_MT_SMTC */
123 #endif /* CONFIG_MIPS32R2_MT_SMP */