cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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irq_32.c (1008B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * SHcompact irqflags support
      4 *
      5 * Copyright (C) 2006 - 2009 Paul Mundt
      6 */
      7#include <linux/irqflags.h>
      8#include <linux/module.h>
      9
     10void notrace arch_local_irq_restore(unsigned long flags)
     11{
     12	unsigned long __dummy0, __dummy1;
     13
     14	if (flags == ARCH_IRQ_DISABLED) {
     15		__asm__ __volatile__ (
     16			"stc	sr, %0\n\t"
     17			"or	#0xf0, %0\n\t"
     18			"ldc	%0, sr\n\t"
     19			: "=&z" (__dummy0)
     20			: /* no inputs */
     21			: "memory"
     22		);
     23	} else {
     24		__asm__ __volatile__ (
     25			"stc	sr, %0\n\t"
     26			"and	%1, %0\n\t"
     27#ifdef CONFIG_CPU_HAS_SR_RB
     28			"stc	r6_bank, %1\n\t"
     29			"or	%1, %0\n\t"
     30#endif
     31			"ldc	%0, sr\n\t"
     32			: "=&r" (__dummy0), "=r" (__dummy1)
     33			: "1" (~ARCH_IRQ_DISABLED)
     34			: "memory"
     35		);
     36	}
     37}
     38EXPORT_SYMBOL(arch_local_irq_restore);
     39
     40unsigned long notrace arch_local_save_flags(void)
     41{
     42	unsigned long flags;
     43
     44	__asm__ __volatile__ (
     45		"stc	sr, %0\n\t"
     46		"and	#0xf0, %0\n\t"
     47		: "=&z" (flags)
     48		: /* no inputs */
     49		: "memory"
     50	);
     51
     52	return flags;
     53}
     54EXPORT_SYMBOL(arch_local_save_flags);