/* must be called with cpucontrol mutex held */
int __cpu_disable(void)
{
int cpu = smp_processor_id();
/*
* dont permit boot processor for now
*/
if (cpu == 0 && !bsp_remove_ok) {
printk ("Your platform does not support removal of BSP\n");
return (-EBUSY);
}
if (ia64_platform_is("sn2")) {
if (!sn_cpu_disable_allowed(cpu))
return -EBUSY;
}
set_cpu_online(cpu, false);
if (migrate_platform_irqs(cpu)) {
set_cpu_online(cpu, true);
return -EBUSY;
}
remove_siblinginfo(cpu);
fixup_irqs();
local_flush_tlb_all();
cpu_clear(cpu, cpu_callin_map);
return 0;
}
/* must be called with cpucontrol mutex held */
int __cpu_disable(void)
{
int cpu = smp_processor_id();
/*
* dont permit boot processor for now
*/
if (cpu == 0 && !bsp_remove_ok) {
printk ("Your platform does not support removal of BSP\n");
return (-EBUSY);
}
cpu_clear(cpu, cpu_online_map);
if (migrate_platform_irqs(cpu)) {
cpu_set(cpu, cpu_online_map);
return (-EBUSY);
}
remove_siblinginfo(cpu);
cpu_clear(cpu, cpu_online_map);
fixup_irqs();
local_flush_tlb_all();
cpu_clear(cpu, cpu_callin_map);
return 0;
}
int generic_cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
if (cpu == boot_cpuid)
return -EBUSY;
cpu_clear(cpu, cpu_online_map);
#ifdef CONFIG_PPC64
vdso_data->processorCount--;
fixup_irqs(cpu_online_map);
#endif
return 0;
}
int __cpu_disable(void)
{
int cpu = smp_processor_id();
/*
* dont permit boot processor for now
*/
if (cpu == 0)
return -EBUSY;
fixup_irqs();
local_flush_tlb_all();
printk ("Disabled cpu %u\n", smp_processor_id());
return 0;
}
int generic_cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
if (cpu == boot_cpuid)
return -EBUSY;
set_cpu_online(cpu, false);
#ifdef CONFIG_PPC64
vdso_data->processorCount--;
#endif
#if defined(CONFIG_PPC64) || defined(CONFIG_E500)
fixup_irqs(cpu_online_mask);
#endif
return 0;
}
int generic_cpu_enable(unsigned int cpu)
{
/* Do the normal bootup if we haven't
* already bootstrapped. */
if (system_state != SYSTEM_RUNNING)
return -ENOSYS;
/* get the target out of it's holding state */
per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
smp_wmb();
while (!cpu_online(cpu))
cpu_relax();
#ifdef CONFIG_PPC64
fixup_irqs(cpu_online_map);
/* counter the irq disable in fixup_irqs */
local_irq_enable();
#endif
return 0;
}
static void parse_devtree(const char *filename)
{
FILE *f;
void *dt;
f = fopen(filename, "rb");
if (!f)
goto err;
fseek(f, 0, SEEK_END);
machine_devtree_size = ftell(f);
fseek(f, 0, SEEK_SET);
dt = qemu_malloc(machine_devtree_size);
if (!dt)
goto err_close;
machine_devtree = dt;
if (fread(dt, machine_devtree_size, 1, f) != 1)
goto err_close;
if (fdt_check_header(dt))
goto err_close;
create_cpus(dt);
create_ram(dt);
scan_devtree(dt);
fixup_irqs();
fclose(f);
return;
err_close:
fclose(f);
err:
fprintf(stderr, "Failed to load device tree\n");
exit(1);
}
