140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
/*
|
|
* SMP Support
|
|
*
|
|
* Copyright (C) 1999 VA Linux Systems
|
|
* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
|
|
* (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P.
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
|
* Bjorn Helgaas <bjorn.helgaas@hp.com>
|
|
*/
|
|
#ifndef _ASM_IA64_SMP_H
|
|
#define _ASM_IA64_SMP_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/init.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/cpumask.h>
|
|
|
|
#include <asm/bitops.h>
|
|
#include <asm/io.h>
|
|
#include <asm/param.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
static inline unsigned int
|
|
ia64_get_lid (void)
|
|
{
|
|
union {
|
|
struct {
|
|
unsigned long reserved : 16;
|
|
unsigned long eid : 8;
|
|
unsigned long id : 8;
|
|
unsigned long ignored : 32;
|
|
} f;
|
|
unsigned long bits;
|
|
} lid;
|
|
|
|
lid.bits = ia64_getreg(_IA64_REG_CR_LID);
|
|
return lid.f.id << 8 | lid.f.eid;
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
#define XTP_OFFSET 0x1e0008
|
|
|
|
#define SMP_IRQ_REDIRECTION (1 << 0)
|
|
#define SMP_IPI_REDIRECTION (1 << 1)
|
|
|
|
#define smp_processor_id() (current_thread_info()->cpu)
|
|
|
|
extern struct smp_boot_data {
|
|
int cpu_count;
|
|
int cpu_phys_id[NR_CPUS];
|
|
} smp_boot_data __initdata;
|
|
|
|
extern char no_int_routing __devinitdata;
|
|
|
|
extern cpumask_t cpu_online_map;
|
|
extern cpumask_t cpu_core_map[NR_CPUS];
|
|
extern cpumask_t cpu_sibling_map[NR_CPUS];
|
|
extern int smp_num_siblings;
|
|
extern int smp_num_cpucores;
|
|
extern void __iomem *ipi_base_addr;
|
|
extern unsigned char smp_int_redirect;
|
|
|
|
extern volatile int ia64_cpu_to_sapicid[];
|
|
#define cpu_physical_id(i) ia64_cpu_to_sapicid[i]
|
|
|
|
extern unsigned long ap_wakeup_vector;
|
|
|
|
/*
|
|
* Function to map hard smp processor id to logical id. Slow, so don't use this in
|
|
* performance-critical code.
|
|
*/
|
|
static inline int
|
|
cpu_logical_id (int cpuid)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NR_CPUS; ++i)
|
|
if (cpu_physical_id(i) == cpuid)
|
|
break;
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* XTP control functions:
|
|
* min_xtp : route all interrupts to this CPU
|
|
* normal_xtp: nominal XTP value
|
|
* max_xtp : never deliver interrupts to this CPU.
|
|
*/
|
|
|
|
static inline void
|
|
min_xtp (void)
|
|
{
|
|
if (smp_int_redirect & SMP_IRQ_REDIRECTION)
|
|
writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */
|
|
}
|
|
|
|
static inline void
|
|
normal_xtp (void)
|
|
{
|
|
if (smp_int_redirect & SMP_IRQ_REDIRECTION)
|
|
writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */
|
|
}
|
|
|
|
static inline void
|
|
max_xtp (void)
|
|
{
|
|
if (smp_int_redirect & SMP_IRQ_REDIRECTION)
|
|
writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
|
|
}
|
|
|
|
#define hard_smp_processor_id() ia64_get_lid()
|
|
|
|
/* Upping and downing of CPUs */
|
|
extern int __cpu_disable (void);
|
|
extern void __cpu_die (unsigned int cpu);
|
|
extern void cpu_die (void) __attribute__ ((noreturn));
|
|
extern int __cpu_up (unsigned int cpu);
|
|
extern void __init smp_build_cpu_map(void);
|
|
|
|
extern void __init init_smp_config (void);
|
|
extern void smp_do_timer (struct pt_regs *regs);
|
|
|
|
extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info,
|
|
int retry, int wait);
|
|
extern void smp_send_reschedule (int cpu);
|
|
extern void lock_ipi_calllock(void);
|
|
extern void unlock_ipi_calllock(void);
|
|
extern void identify_siblings (struct cpuinfo_ia64 *);
|
|
|
|
#else
|
|
|
|
#define cpu_logical_id(i) 0
|
|
#define cpu_physical_id(i) ia64_get_lid()
|
|
|
|
#endif /* CONFIG_SMP */
|
|
#endif /* _ASM_IA64_SMP_H */
|