071d2f0b54
Only build the checks for R4k errata workarounds if we expect that the kernel might actually run on a system with an R4k CPU - ie. CONFIG_SYS_HAS_CPU_R4X00=y & we're targeting a pre-MIPSr1 ISA revision. Rename cpu-bugs64.c to r4k-bugs64.c to indicate the fact that the code is specific to R4k CPUs. Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: linux-mips@vger.kernel.org
54 lines
989 B
C
54 lines
989 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This is included by init/main.c to check for architecture-dependent bugs.
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*
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* Copyright (C) 2007 Maciej W. Rozycki
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*
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* Needs:
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* void check_bugs(void);
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*/
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#ifndef _ASM_BUGS_H
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#define _ASM_BUGS_H
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#include <linux/bug.h>
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#include <linux/delay.h>
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#include <linux/smp.h>
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#include <asm/cpu.h>
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#include <asm/cpu-info.h>
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extern int daddiu_bug;
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extern void check_bugs64_early(void);
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extern void check_bugs32(void);
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extern void check_bugs64(void);
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static inline void check_bugs_early(void)
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{
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if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
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check_bugs64_early();
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}
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static inline void check_bugs(void)
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{
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unsigned int cpu = smp_processor_id();
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cpu_data[cpu].udelay_val = loops_per_jiffy;
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check_bugs32();
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if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
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check_bugs64();
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}
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static inline int r4k_daddiu_bug(void)
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{
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if (!IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
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return 0;
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WARN_ON(daddiu_bug < 0);
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return daddiu_bug != 0;
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}
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#endif /* _ASM_BUGS_H */
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