#include <linux/init.h> #include <linux/smp.h> #include <asm/smp.h> #include <asm/io.h> #include "cobalt.h" #include "mach_apic.h" /* Have we found an MP table */ int smp_found_config; /* * Various Linux-internal data structures created from the * MP-table. */ int apic_version [MAX_APICS]; int pic_mode; unsigned long mp_lapic_addr; /* Processor that is doing the boot up */ unsigned int boot_cpu_physical_apicid = -1U; /* Bitmask of physically existing CPUs */ physid_mask_t phys_cpu_present_map; unsigned int __initdata maxcpus = NR_CPUS; /* * The Visual Workstation is Intel MP compliant in the hardware * sense, but it doesn't have a BIOS(-configuration table). * No problem for Linux. */ static void __init MP_processor_info (struct mpc_config_processor *m) { int ver, logical_apicid; physid_mask_t apic_cpus; if (!(m->mpc_cpuflag & CPU_ENABLED)) return; logical_apicid = m->mpc_apicid; printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n", m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "", m->mpc_apicid, (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8, (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4, m->mpc_apicver); if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) boot_cpu_physical_apicid = m->mpc_apicid; ver = m->mpc_apicver; if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) { printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n", m->mpc_apicid, MAX_APICS); return; } apic_cpus = apicid_to_cpu_present(m->mpc_apicid); physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus); /* * Validate version */ if (ver == 0x0) { printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! " "fixing up to 0x10. (tell your hw vendor)\n", m->mpc_apicid); ver = 0x10; } apic_version[m->mpc_apicid] = ver; } void __init find_smp_config(void) { struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS); unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS)); if (ncpus > CO_CPU_MAX) { printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n", ncpus, mp); ncpus = CO_CPU_MAX; } if (ncpus > maxcpus) ncpus = maxcpus; smp_found_config = 1; while (ncpus--) MP_processor_info(mp++); mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; } void __init get_smp_config (void) { }