mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
89 lines
1.7 KiB
C
89 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* (C) Copyright 2008-2011
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* Portions of this file are derived from the Linux kernel source
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifndef __X86_CONTROL_REGS_H
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#define __X86_CONTROL_REGS_H
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/*
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* The memory clobber prevents the GCC from reordering the read/write order
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* of CR0
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*/
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static inline unsigned long read_cr0(void)
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{
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unsigned long val;
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asm volatile ("movl %%cr0, %0" : "=r" (val) : : "memory");
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return val;
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}
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static inline void write_cr0(unsigned long val)
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{
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asm volatile ("movl %0, %%cr0" : : "r" (val) : "memory");
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}
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static inline unsigned long read_cr2(void)
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{
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unsigned long val;
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asm volatile("mov %%cr2,%0\n\t" : "=r" (val) : : "memory");
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return val;
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}
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static inline unsigned long read_cr3(void)
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{
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unsigned long val;
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asm volatile("mov %%cr3,%0\n\t" : "=r" (val) : : "memory");
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return val;
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}
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static inline unsigned long read_cr4(void)
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{
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unsigned long val;
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asm volatile("mov %%cr4,%0\n\t" : "=r" (val) : : "memory");
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return val;
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}
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static inline unsigned long get_debugreg(int regno)
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{
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unsigned long val = 0; /* Damn you, gcc! */
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switch (regno) {
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case 0:
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asm("mov %%db0, %0" : "=r" (val));
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break;
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case 1:
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asm("mov %%db1, %0" : "=r" (val));
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break;
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case 2:
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asm("mov %%db2, %0" : "=r" (val));
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break;
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case 3:
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asm("mov %%db3, %0" : "=r" (val));
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break;
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case 6:
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asm("mov %%db6, %0" : "=r" (val));
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break;
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case 7:
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asm("mov %%db7, %0" : "=r" (val));
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break;
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default:
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val = 0;
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}
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return val;
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}
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#endif
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