mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 12:26:45 +07:00
e65f38ed0b
Create a temporary page table to startup secondary processors. This page table must have a 1:1 virtual/physical mapping for the kernel in addition to the standard mappings to ensure that the secondary CPU can enable its MMU safely. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/*
|
|
* linux/include/asm-arm/smp.h
|
|
*
|
|
* Copyright (C) 2004-2005 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef __ASM_ARM_SMP_H
|
|
#define __ASM_ARM_SMP_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/thread_info.h>
|
|
|
|
#include <asm/arch/smp.h>
|
|
|
|
#ifndef CONFIG_SMP
|
|
# error "<asm-arm/smp.h> included in non-SMP build"
|
|
#endif
|
|
|
|
#define smp_processor_id() (current_thread_info()->cpu)
|
|
|
|
extern cpumask_t cpu_present_mask;
|
|
#define cpu_possible_map cpu_present_mask
|
|
|
|
/*
|
|
* at the moment, there's not a big penalty for changing CPUs
|
|
* (the >big< penalty is running SMP in the first place)
|
|
*/
|
|
#define PROC_CHANGE_PENALTY 15
|
|
|
|
struct seq_file;
|
|
|
|
/*
|
|
* generate IPI list text
|
|
*/
|
|
extern void show_ipi_list(struct seq_file *p);
|
|
|
|
/*
|
|
* Move global data into per-processor storage.
|
|
*/
|
|
extern void smp_store_cpu_info(unsigned int cpuid);
|
|
|
|
/*
|
|
* Raise an IPI cross call on CPUs in callmap.
|
|
*/
|
|
extern void smp_cross_call(cpumask_t callmap);
|
|
|
|
/*
|
|
* Boot a secondary CPU, and assign it the specified idle task.
|
|
* This also gives us the initial stack to use for this CPU.
|
|
*/
|
|
extern int boot_secondary(unsigned int cpu, struct task_struct *);
|
|
|
|
/*
|
|
* Perform platform specific initialisation of the specified CPU.
|
|
*/
|
|
extern void platform_secondary_init(unsigned int cpu);
|
|
|
|
/*
|
|
* Initial data for bringing up a secondary CPU.
|
|
*/
|
|
struct secondary_data {
|
|
unsigned long pgdir;
|
|
void *stack;
|
|
};
|
|
extern struct secondary_data secondary_data;
|
|
|
|
#endif /* ifndef __ASM_ARM_SMP_H */
|