2 * Malta Platform-specific hooks for SMP operation
5 #include <linux/kernel.h>
6 #include <linux/sched.h>
7 #include <linux/cpumask.h>
8 #include <linux/interrupt.h>
10 #include <asm/atomic.h>
12 #include <asm/processor.h>
13 #include <asm/system.h>
14 #include <asm/hardirq.h>
15 #include <asm/mmu_context.h>
17 #ifdef CONFIG_MIPS_MT_SMTC
18 #include <asm/smtc_ipi.h>
19 #endif /* CONFIG_MIPS_MT_SMTC */
21 /* VPE/SMP Prototype implements platform interfaces directly */
22 #if !defined(CONFIG_MIPS_MT_SMP)
25 * Cause the specified action to be performed on a targeted "CPU"
28 void core_send_ipi(int cpu, unsigned int action)
30 /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
31 #ifdef CONFIG_MIPS_MT_SMTC
32 smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
33 #endif /* CONFIG_MIPS_MT_SMTC */
37 * Platform "CPU" startup hook
40 void prom_boot_secondary(int cpu, struct task_struct *idle)
42 #ifdef CONFIG_MIPS_MT_SMTC
43 smtc_boot_secondary(cpu, idle);
44 #endif /* CONFIG_MIPS_MT_SMTC */
48 * Post-config but pre-boot cleanup entry point
51 void prom_init_secondary(void)
53 #ifdef CONFIG_MIPS_MT_SMTC
54 void smtc_init_secondary(void);
57 /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
58 myvpe = read_c0_tcbind() & TCBIND_CURVPE;
60 /* Ideally, this should be done only once per VPE, but... */
61 clear_c0_status(STATUSF_IP2);
62 set_c0_status(STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP3
63 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6
67 smtc_init_secondary();
68 #endif /* CONFIG_MIPS_MT_SMTC */
72 * Platform SMP pre-initialization
74 * As noted above, we can assume a single CPU for now
75 * but it may be multithreaded.
78 void plat_smp_setup(void)
80 if (read_c0_config3() & (1<<2))
81 mipsmt_build_cpu_map(0);
84 void __init plat_prepare_cpus(unsigned int max_cpus)
86 if (read_c0_config3() & (1<<2))
87 mipsmt_prepare_cpus();
91 * SMP initialization finalization entry point
94 void prom_smp_finish(void)
96 #ifdef CONFIG_MIPS_MT_SMTC
98 #endif /* CONFIG_MIPS_MT_SMTC */
102 * Hook for after all CPUs are online
105 void prom_cpus_done(void)
109 #endif /* CONFIG_MIPS32R2_MT_SMP */