105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
/*
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* MSP71xx Platform-specific hooks for SMP operation
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*/
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#include <linux/irq.h>
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#include <linux/init.h>
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#include <asm/mipsmtregs.h>
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#include <asm/mipsregs.h>
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#include <asm/smtc.h>
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#include <asm/smtc_ipi.h>
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/* VPE/SMP Prototype implements platform interfaces directly */
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/*
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* Cause the specified action to be performed on a targeted "CPU"
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*/
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static void msp_smtc_send_ipi_single(int cpu, unsigned int action)
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{
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/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
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smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
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}
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static void msp_smtc_send_ipi_mask(const struct cpumask *mask,
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unsigned int action)
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{
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unsigned int i;
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for_each_cpu(i, mask)
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msp_smtc_send_ipi_single(i, action);
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}
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/*
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* Post-config but pre-boot cleanup entry point
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*/
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static void msp_smtc_init_secondary(void)
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{
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int myvpe;
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/* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
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myvpe = read_c0_tcbind() & TCBIND_CURVPE;
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if (myvpe > 0)
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change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 |
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STATUSF_IP6 | STATUSF_IP7);
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smtc_init_secondary();
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}
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/*
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* Platform "CPU" startup hook
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*/
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static void msp_smtc_boot_secondary(int cpu, struct task_struct *idle)
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{
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smtc_boot_secondary(cpu, idle);
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}
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/*
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* SMP initialization finalization entry point
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*/
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static void msp_smtc_smp_finish(void)
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{
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smtc_smp_finish();
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}
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/*
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* Hook for after all CPUs are online
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*/
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static void msp_smtc_cpus_done(void)
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{
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}
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/*
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* Platform SMP pre-initialization
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*
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* As noted above, we can assume a single CPU for now
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* but it may be multithreaded.
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*/
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static void __init msp_smtc_smp_setup(void)
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{
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/*
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* we won't get the definitive value until
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* we've run smtc_prepare_cpus later, but
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*/
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if (read_c0_config3() & (1 << 2))
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smp_num_siblings = smtc_build_cpu_map(0);
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}
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static void __init msp_smtc_prepare_cpus(unsigned int max_cpus)
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{
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smtc_prepare_cpus(max_cpus);
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}
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struct plat_smp_ops msp_smtc_smp_ops = {
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.send_ipi_single = msp_smtc_send_ipi_single,
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.send_ipi_mask = msp_smtc_send_ipi_mask,
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.init_secondary = msp_smtc_init_secondary,
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.smp_finish = msp_smtc_smp_finish,
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.cpus_done = msp_smtc_cpus_done,
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.boot_secondary = msp_smtc_boot_secondary,
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.smp_setup = msp_smtc_smp_setup,
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.prepare_cpus = msp_smtc_prepare_cpus,
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};
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