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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
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/* smp.h: Sparc64 specific SMP stuff.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC64_SMP_H
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#define _SPARC64_SMP_H
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#include <linux/config.h>
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#include <linux/threads.h>
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#include <asm/asi.h>
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#include <asm/starfire.h>
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#include <asm/spitfire.h>
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <linux/cache.h>
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#endif /* !(__ASSEMBLY__) */
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#ifdef CONFIG_SMP
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#ifndef __ASSEMBLY__
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/*
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* Private routines/data
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*/
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#include <asm/bitops.h>
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#include <asm/atomic.h>
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extern cpumask_t phys_cpu_present_map;
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#define cpu_possible_map phys_cpu_present_map
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/*
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* General functions that each host system must provide.
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*/
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static __inline__ int hard_smp_processor_id(void)
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{
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if (tlb_type == cheetah || tlb_type == cheetah_plus) {
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unsigned long cfg, ver;
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__asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
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if ((ver >> 32) == 0x003e0016) {
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__asm__ __volatile__("ldxa [%%g0] %1, %0"
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: "=r" (cfg)
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: "i" (ASI_JBUS_CONFIG));
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return ((cfg >> 17) & 0x1f);
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} else {
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__asm__ __volatile__("ldxa [%%g0] %1, %0"
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: "=r" (cfg)
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: "i" (ASI_SAFARI_CONFIG));
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return ((cfg >> 17) & 0x3ff);
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}
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} else if (this_is_starfire != 0) {
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return starfire_hard_smp_processor_id();
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} else {
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unsigned long upaconfig;
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__asm__ __volatile__("ldxa [%%g0] %1, %0"
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: "=r" (upaconfig)
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: "i" (ASI_UPA_CONFIG));
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return ((upaconfig >> 17) & 0x1f);
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}
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}
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#define smp_processor_id() (current_thread_info()->cpu)
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#endif /* !(__ASSEMBLY__) */
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#endif /* !(CONFIG_SMP) */
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#define NO_PROC_ID 0xFF
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#endif /* !(_SPARC64_SMP_H) */
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