7abea92145
The change to kernel/sched.c's init code to use for_each_cpu() requires that the cpu_possible_map be setup much earlier. Set it up via setup_arch(), constrained to NR_CPUS, and later constrain it to max_cpus in smp_prepare_cpus(). This fixes SMP booting on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/* smp.h: Sparc64 specific SMP stuff.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
|
|
*/
|
|
|
|
#ifndef _SPARC64_SMP_H
|
|
#define _SPARC64_SMP_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/threads.h>
|
|
#include <asm/asi.h>
|
|
#include <asm/starfire.h>
|
|
#include <asm/spitfire.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/cpumask.h>
|
|
#include <linux/cache.h>
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* Private routines/data
|
|
*/
|
|
|
|
#include <asm/bitops.h>
|
|
#include <asm/atomic.h>
|
|
|
|
extern cpumask_t phys_cpu_present_map;
|
|
#define cpu_possible_map phys_cpu_present_map
|
|
|
|
/*
|
|
* General functions that each host system must provide.
|
|
*/
|
|
|
|
static __inline__ int hard_smp_processor_id(void)
|
|
{
|
|
if (tlb_type == cheetah || tlb_type == cheetah_plus) {
|
|
unsigned long cfg, ver;
|
|
__asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
|
|
if ((ver >> 32) == 0x003e0016) {
|
|
__asm__ __volatile__("ldxa [%%g0] %1, %0"
|
|
: "=r" (cfg)
|
|
: "i" (ASI_JBUS_CONFIG));
|
|
return ((cfg >> 17) & 0x1f);
|
|
} else {
|
|
__asm__ __volatile__("ldxa [%%g0] %1, %0"
|
|
: "=r" (cfg)
|
|
: "i" (ASI_SAFARI_CONFIG));
|
|
return ((cfg >> 17) & 0x3ff);
|
|
}
|
|
} else if (this_is_starfire != 0) {
|
|
return starfire_hard_smp_processor_id();
|
|
} else {
|
|
unsigned long upaconfig;
|
|
__asm__ __volatile__("ldxa [%%g0] %1, %0"
|
|
: "=r" (upaconfig)
|
|
: "i" (ASI_UPA_CONFIG));
|
|
return ((upaconfig >> 17) & 0x1f);
|
|
}
|
|
}
|
|
|
|
#define raw_smp_processor_id() (current_thread_info()->cpu)
|
|
|
|
extern void smp_setup_cpu_possible_map(void);
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
#else
|
|
|
|
#define smp_setup_cpu_possible_map() do { } while (0)
|
|
|
|
#endif /* !(CONFIG_SMP) */
|
|
|
|
#define NO_PROC_ID 0xFF
|
|
|
|
#endif /* !(_SPARC64_SMP_H) */
|