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Viewing changes to arch/mips/kernel/smp-cmp.c

  • Committer: Bazaar Package Importer
  • Author(s): Luke Yelavich
  • Date: 2009-08-05 23:00:52 UTC
  • Revision ID: james.westby@ubuntu.com-20090805230052-7xedvqcyk9dnnxb2
Tags: 2.6.31-1.1
New upstream release

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arch/mips/kernel/smp-cmp.c
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#include <linux/kernel.h>
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#include <linux/sched.h>
 
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#include <linux/smp.h>
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#include <linux/cpumask.h>
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#include <linux/interrupt.h>
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#include <linux/compiler.h>
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#include <asm/mipsregs.h>
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#include <asm/mipsmtregs.h>
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#include <asm/mips_mt.h>
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/*
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 * Crude manipulation of the CPU masks to control which
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 * which CPU's are brought online during initialisation
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 *
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 * Beware... this needs to be called after CPU discovery
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 * but before CPU bringup
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 */
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static int __init allowcpus(char *str)
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{
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        cpumask_t cpu_allow_map;
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        char buf[256];
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        int len;
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        cpus_clear(cpu_allow_map);
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        if (cpulist_parse(str, &cpu_allow_map) == 0) {
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                cpu_set(0, cpu_allow_map);
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                cpus_and(cpu_possible_map, cpu_possible_map, cpu_allow_map);
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                len = cpulist_scnprintf(buf, sizeof(buf)-1, &cpu_possible_map);
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                buf[len] = '\0';
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                pr_debug("Allowable CPUs: %s\n", buf);
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                return 1;
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        } else
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                return 0;
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}
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__setup("allowcpus=", allowcpus);
 
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#include <asm/amon.h>
 
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#include <asm/gic.h>
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static void ipi_call_function(unsigned int cpu)
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{
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        unsigned int action = 0;
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        pr_debug("CPU%d: %s cpu %d status %08x\n",
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                 smp_processor_id(), __func__, cpu, read_c0_status());
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        switch (cpu) {
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        case 0:
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                action = GIC_IPI_EXT_INTR_CALLFNC_VPE0;
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                break;
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        case 1:
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                action = GIC_IPI_EXT_INTR_CALLFNC_VPE1;
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                break;
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        case 2:
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                action = GIC_IPI_EXT_INTR_CALLFNC_VPE2;
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                break;
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        case 3:
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                action = GIC_IPI_EXT_INTR_CALLFNC_VPE3;
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                break;
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        }
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        gic_send_ipi(action);
 
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        gic_send_ipi(plat_ipi_call_int_xlate(cpu));
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}
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static void ipi_resched(unsigned int cpu)
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{
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        unsigned int action = 0;
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        pr_debug("CPU%d: %s cpu %d status %08x\n",
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                 smp_processor_id(), __func__, cpu, read_c0_status());
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        switch (cpu) {
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        case 0:
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                action = GIC_IPI_EXT_INTR_RESCHED_VPE0;
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                break;
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        case 1:
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                action = GIC_IPI_EXT_INTR_RESCHED_VPE1;
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                break;
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        case 2:
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                action = GIC_IPI_EXT_INTR_RESCHED_VPE2;
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                break;
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        case 3:
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                action = GIC_IPI_EXT_INTR_RESCHED_VPE3;
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                break;
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        }
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        gic_send_ipi(action);
 
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        gic_send_ipi(plat_ipi_resched_int_xlate(cpu));
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}
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/*
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                           (unsigned long)(gp + sizeof(struct thread_info)));
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#endif
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        amon_cpu_start(cpu, pc, sp, gp, a0);
 
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        amon_cpu_start(cpu, pc, sp, (unsigned long)gp, a0);
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}
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/*