2 * Malta Platform-specific hooks for SMP operation
5 #include <linux/init.h>
7 #include <asm/mipsregs.h>
8 #include <asm/mipsmtregs.h>
10 #include <asm/smtc_ipi.h>
12 /* VPE/SMP Prototype implements platform interfaces directly */
15 * Cause the specified action to be performed on a targeted "CPU"
18 void core_send_ipi(int cpu, unsigned int action)
20 /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
21 smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
25 * Platform "CPU" startup hook
28 void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
30 smtc_boot_secondary(cpu, idle);
34 * Post-config but pre-boot cleanup entry point
37 void __cpuinit prom_init_secondary(void)
39 void smtc_init_secondary(void);
42 /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
43 myvpe = read_c0_tcbind() & TCBIND_CURVPE;
45 /* Ideally, this should be done only once per VPE, but... */
46 clear_c0_status(ST0_IM);
47 set_c0_status((0x100 << cp0_compare_irq)
48 | (0x100 << MIPS_CPU_IPI_IRQ));
49 if (cp0_perfcount_irq >= 0)
50 set_c0_status(0x100 << cp0_perfcount_irq);
53 smtc_init_secondary();
57 * Platform SMP pre-initialization
59 * As noted above, we can assume a single CPU for now
60 * but it may be multithreaded.
63 void __cpuinit plat_smp_setup(void)
65 if (read_c0_config3() & (1<<2))
66 mipsmt_build_cpu_map(0);
69 void __init plat_prepare_cpus(unsigned int max_cpus)
71 if (read_c0_config3() & (1<<2))
72 mipsmt_prepare_cpus();
76 * SMP initialization finalization entry point
79 void __cpuinit prom_smp_finish(void)
85 * Hook for after all CPUs are online
88 void prom_cpus_done(void)