mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:36:47 +07:00
6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <asm/smp.h>
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#include <asm/io.h>
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#include "cobalt.h"
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#include "mach_apic.h"
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/* Have we found an MP table */
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int smp_found_config;
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/*
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* Various Linux-internal data structures created from the
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* MP-table.
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*/
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int apic_version [MAX_APICS];
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int pic_mode;
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unsigned long mp_lapic_addr;
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/* Processor that is doing the boot up */
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unsigned int boot_cpu_physical_apicid = -1U;
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/* Bitmask of physically existing CPUs */
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physid_mask_t phys_cpu_present_map;
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unsigned int __initdata maxcpus = NR_CPUS;
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/*
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* The Visual Workstation is Intel MP compliant in the hardware
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* sense, but it doesn't have a BIOS(-configuration table).
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* No problem for Linux.
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*/
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static void __init MP_processor_info (struct mpc_config_processor *m)
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{
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int ver, logical_apicid;
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physid_mask_t apic_cpus;
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if (!(m->mpc_cpuflag & CPU_ENABLED))
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return;
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logical_apicid = m->mpc_apicid;
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printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n",
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m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
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m->mpc_apicid,
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(m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
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(m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
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m->mpc_apicver);
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if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
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boot_cpu_physical_apicid = m->mpc_apicid;
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ver = m->mpc_apicver;
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if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
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printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
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m->mpc_apicid, MAX_APICS);
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return;
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}
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apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
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physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
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/*
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* Validate version
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*/
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if (ver == 0x0) {
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printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
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"fixing up to 0x10. (tell your hw vendor)\n",
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m->mpc_apicid);
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ver = 0x10;
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}
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apic_version[m->mpc_apicid] = ver;
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}
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void __init find_smp_config(void)
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{
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struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
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unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
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if (ncpus > CO_CPU_MAX) {
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printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
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ncpus, mp);
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ncpus = CO_CPU_MAX;
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}
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if (ncpus > maxcpus)
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ncpus = maxcpus;
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smp_found_config = 1;
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while (ncpus--)
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MP_processor_info(mp++);
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mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
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}
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void __init get_smp_config (void)
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{
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}
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