31139971b3
This allows cpus to be off-lined on 32-bit SMP powermacs. When a cpu is off-lined, it is put into sleep mode with interrupts disabled. It can be on-lined again by asserting its soft-reset pin, which is connected to a GPIO pin. With this I can off-line the second cpu in my dual G4 powermac, which means that I can then suspend the machine (the suspend/resume code refuses to suspend if more than one cpu is online, and making it cope with multiple cpus is surprisingly messy). Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* smp.h: PPC specific SMP stuff.
|
|
*
|
|
* Original was a copy of sparc smp.h. Now heavily modified
|
|
* for PPC.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
|
|
*/
|
|
#ifdef __KERNEL__
|
|
#ifndef _PPC_SMP_H
|
|
#define _PPC_SMP_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/threads.h>
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct cpuinfo_PPC {
|
|
unsigned long loops_per_jiffy;
|
|
unsigned long pvr;
|
|
unsigned long *pgd_cache;
|
|
unsigned long *pte_cache;
|
|
unsigned long pgtable_cache_sz;
|
|
};
|
|
|
|
extern struct cpuinfo_PPC cpu_data[];
|
|
extern cpumask_t cpu_online_map;
|
|
extern cpumask_t cpu_possible_map;
|
|
extern unsigned long smp_proc_in_lock[];
|
|
extern volatile unsigned long cpu_callin_map[];
|
|
extern int smp_tb_synchronized;
|
|
|
|
extern void smp_send_tlb_invalidate(int);
|
|
extern void smp_send_xmon_break(int cpu);
|
|
struct pt_regs;
|
|
extern void smp_message_recv(int, struct pt_regs *);
|
|
|
|
extern int __cpu_disable(void);
|
|
extern void __cpu_die(unsigned int cpu);
|
|
extern void cpu_die(void) __attribute__((noreturn));
|
|
|
|
#define NO_PROC_ID 0xFF /* No processor magic marker */
|
|
#define PROC_CHANGE_PENALTY 20
|
|
|
|
#define raw_smp_processor_id() (current_thread_info()->cpu)
|
|
|
|
extern int __cpu_up(unsigned int cpu);
|
|
|
|
extern int smp_hw_index[];
|
|
#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
|
|
|
|
struct klock_info_struct {
|
|
unsigned long kernel_flag;
|
|
unsigned char akp;
|
|
};
|
|
|
|
extern struct klock_info_struct klock_info;
|
|
#define KLOCK_HELD 0xffffffff
|
|
#define KLOCK_CLEAR 0x0
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#else /* !(CONFIG_SMP) */
|
|
|
|
static inline void cpu_die(void) { }
|
|
|
|
#endif /* !(CONFIG_SMP) */
|
|
|
|
#endif /* !(_PPC_SMP_H) */
|
|
#endif /* __KERNEL__ */
|