2 #include <linux/config.h>
3 #include <linux/init.h>
10 #include "mach_apic.h"
12 /* Have we found an MP table */
16 * Various Linux-internal data structures created from the
19 int apic_version [MAX_APICS];
22 unsigned long mp_lapic_addr;
24 /* Processor that is doing the boot up */
25 unsigned int boot_cpu_physical_apicid = -1U;
26 unsigned int boot_cpu_logical_apicid = -1U;
28 /* Bitmask of physically existing CPUs */
29 physid_mask_t phys_cpu_present_map;
31 unsigned int __initdata maxcpus = NR_CPUS;
34 * The Visual Workstation is Intel MP compliant in the hardware
35 * sense, but it doesn't have a BIOS(-configuration table).
36 * No problem for Linux.
39 static void __init MP_processor_info (struct mpc_config_processor *m)
41 int ver, logical_apicid;
42 physid_mask_t apic_cpus;
44 if (!(m->mpc_cpuflag & CPU_ENABLED))
47 logical_apicid = m->mpc_apicid;
48 printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n",
49 m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
51 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
52 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
55 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
56 boot_cpu_physical_apicid = m->mpc_apicid;
57 boot_cpu_logical_apicid = logical_apicid;
61 if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
62 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
63 m->mpc_apicid, MAX_APICS);
67 apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
68 physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
73 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
74 "fixing up to 0x10. (tell your hw vendor)\n",
78 apic_version[m->mpc_apicid] = ver;
81 void __init find_smp_config(void)
83 struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
84 unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
86 if (ncpus > CO_CPU_MAX) {
87 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
98 MP_processor_info(mp++);
100 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
103 void __init get_smp_config (void)