mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-24 02:48:51 +09:00
![Wolfgang Denk](/assets/img/avatar_default.png)
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2012 The Chromium OS Authors.
|
|
*
|
|
* (C) Copyright 2008-2011
|
|
* Graeme Russ, <graeme.russ@gmail.com>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
|
|
*
|
|
* Portions of this file are derived from the Linux kernel source
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __X86_CONTROL_REGS_H
|
|
#define __X86_CONTROL_REGS_H
|
|
|
|
/*
|
|
* The memory clobber prevents the GCC from reordering the read/write order
|
|
* of CR0
|
|
*/
|
|
static inline unsigned long read_cr0(void)
|
|
{
|
|
unsigned long val;
|
|
|
|
asm volatile ("movl %%cr0, %0" : "=r" (val) : : "memory");
|
|
return val;
|
|
}
|
|
|
|
static inline void write_cr0(unsigned long val)
|
|
{
|
|
asm volatile ("movl %0, %%cr0" : : "r" (val) : "memory");
|
|
}
|
|
|
|
static inline unsigned long read_cr2(void)
|
|
{
|
|
unsigned long val;
|
|
|
|
asm volatile("mov %%cr2,%0\n\t" : "=r" (val) : : "memory");
|
|
return val;
|
|
}
|
|
|
|
static inline unsigned long read_cr3(void)
|
|
{
|
|
unsigned long val;
|
|
|
|
asm volatile("mov %%cr3,%0\n\t" : "=r" (val) : : "memory");
|
|
return val;
|
|
}
|
|
|
|
static inline unsigned long read_cr4(void)
|
|
{
|
|
unsigned long val;
|
|
|
|
asm volatile("mov %%cr4,%0\n\t" : "=r" (val) : : "memory");
|
|
return val;
|
|
}
|
|
|
|
static inline unsigned long get_debugreg(int regno)
|
|
{
|
|
unsigned long val = 0; /* Damn you, gcc! */
|
|
|
|
switch (regno) {
|
|
case 0:
|
|
asm("mov %%db0, %0" : "=r" (val));
|
|
break;
|
|
case 1:
|
|
asm("mov %%db1, %0" : "=r" (val));
|
|
break;
|
|
case 2:
|
|
asm("mov %%db2, %0" : "=r" (val));
|
|
break;
|
|
case 3:
|
|
asm("mov %%db3, %0" : "=r" (val));
|
|
break;
|
|
case 6:
|
|
asm("mov %%db6, %0" : "=r" (val));
|
|
break;
|
|
case 7:
|
|
asm("mov %%db7, %0" : "=r" (val));
|
|
break;
|
|
default:
|
|
val = 0;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
#endif
|