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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <linux/init.h>
#include <linux/sched/mm.h>
#include <linux/sched/task_stack.h>
#include <linux/sched/task.h>
#include <linux/smp-internal.h>
#include <asm/tlbflush.h>
#include <as-layout.h>
#include <kern.h>
#include <os.h>
#include <skas.h>
#include <kern_util.h>
extern void start_kernel(void);
static int __init start_kernel_proc(void *unused)
{
block_signals_trace();
start_kernel();
return 0;
}
char cpu_irqstacks[NR_CPUS][THREAD_SIZE] __aligned(THREAD_SIZE);
int __init start_uml(void)
{
stack_protections((unsigned long) &cpu_irqstacks[0]);
set_sigstack(cpu_irqstacks[0], THREAD_SIZE);
init_new_thread_signals();
init_task.thread.request.thread.proc = start_kernel_proc;
init_task.thread.request.thread.arg = NULL;
return start_idle_thread(task_stack_page(&init_task),
&init_task.thread.switch_buf);
}
unsigned long current_stub_stack(void)
{
if (current->mm == NULL)
return 0;
return current->mm->context.id.stack;
}
struct mm_id *current_mm_id(void)
{
if (current->mm == NULL)
return NULL;
return ¤t->mm->context.id;
}
void current_mm_sync(void)
{
if (current->mm == NULL)
return;
um_tlb_sync(current->mm);
}
static DEFINE_SPINLOCK(initial_jmpbuf_spinlock);
void initial_jmpbuf_lock(void)
{
spin_lock_irq(&initial_jmpbuf_spinlock);
}
void initial_jmpbuf_unlock(void)
{
spin_unlock_irq(&initial_jmpbuf_spinlock);
}
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