void __init setup_cpuinfo()

in kernel/setup.c [170:209]

• 33 lines of code
• 3 McCabe index (conditional complexity)

void __init setup_cpuinfo(void)
{
	struct device_node *cpu;
	unsigned long iccfgr, dccfgr;
	unsigned long cache_set_size;
	int cpu_id = smp_processor_id();
	struct cpuinfo_or1k *cpuinfo = &cpuinfo_or1k[cpu_id];

	cpu = setup_find_cpu_node(cpu_id);
	if (!cpu)
		panic("Couldn't find CPU%d in device tree...\n", cpu_id);

	iccfgr = mfspr(SPR_ICCFGR);
	cpuinfo->icache_ways = 1 << (iccfgr & SPR_ICCFGR_NCW);
	cache_set_size = 1 << ((iccfgr & SPR_ICCFGR_NCS) >> 3);
	cpuinfo->icache_block_size = 16 << ((iccfgr & SPR_ICCFGR_CBS) >> 7);
	cpuinfo->icache_size =
	    cache_set_size * cpuinfo->icache_ways * cpuinfo->icache_block_size;

	dccfgr = mfspr(SPR_DCCFGR);
	cpuinfo->dcache_ways = 1 << (dccfgr & SPR_DCCFGR_NCW);
	cache_set_size = 1 << ((dccfgr & SPR_DCCFGR_NCS) >> 3);
	cpuinfo->dcache_block_size = 16 << ((dccfgr & SPR_DCCFGR_CBS) >> 7);
	cpuinfo->dcache_size =
	    cache_set_size * cpuinfo->dcache_ways * cpuinfo->dcache_block_size;

	if (of_property_read_u32(cpu, "clock-frequency",
				 &cpuinfo->clock_frequency)) {
		printk(KERN_WARNING
		       "Device tree missing CPU 'clock-frequency' parameter."
		       "Assuming frequency 25MHZ"
		       "This is probably not what you want.");
	}

	cpuinfo->coreid = mfspr(SPR_COREID);

	of_node_put(cpu);

	print_cpuinfo();
}