MIPS: Make DIEI support as a config option
DI(Disable Interrupt) and EI(Enable Interrupt) instructions is required by MIPSR2/MIPSR6, however, it appears to be buggy on some processors such as Loongson-3A1000. Thus we make it as a config option to allow disable it at compile time with CPU_MIPSR2 selected. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: linux-mips@vger.kernel.org Cc: chenhc@lemote.com Cc: paul.burton@mips.com Cc: linux-kernel@vger.kernel.org
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3 changed files with 14 additions and 5 deletions
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@ -2084,12 +2084,14 @@ config CPU_MIPSR2
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bool
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bool
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default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
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default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
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select CPU_HAS_RIXI
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select CPU_HAS_RIXI
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select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
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select MIPS_SPRAM
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select MIPS_SPRAM
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config CPU_MIPSR6
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config CPU_MIPSR6
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bool
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bool
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default y if CPU_MIPS32_R6 || CPU_MIPS64_R6
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default y if CPU_MIPS32_R6 || CPU_MIPS64_R6
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select CPU_HAS_RIXI
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select CPU_HAS_RIXI
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select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
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select HAVE_ARCH_BITREVERSE
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select HAVE_ARCH_BITREVERSE
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select MIPS_ASID_BITS_VARIABLE
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select MIPS_ASID_BITS_VARIABLE
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select MIPS_CRC_SUPPORT
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select MIPS_CRC_SUPPORT
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@ -2549,6 +2551,13 @@ config CPU_HAS_WB
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config XKS01
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config XKS01
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bool
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bool
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config CPU_HAS_DIEI
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depends on !CPU_DIEI_BROKEN
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bool
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config CPU_DIEI_BROKEN
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bool
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config CPU_HAS_RIXI
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config CPU_HAS_RIXI
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bool
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bool
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@ -18,7 +18,7 @@
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#include <asm/compiler.h>
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#include <asm/compiler.h>
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#include <asm/hazards.h>
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#include <asm/hazards.h>
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#if defined(CONFIG_CPU_MIPSR2) || defined (CONFIG_CPU_MIPSR6)
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#if defined(CONFIG_CPU_HAS_DIEI)
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static inline void arch_local_irq_disable(void)
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static inline void arch_local_irq_disable(void)
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{
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{
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@ -94,7 +94,7 @@ static inline void arch_local_irq_restore(unsigned long flags)
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void arch_local_irq_disable(void);
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void arch_local_irq_disable(void);
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unsigned long arch_local_irq_save(void);
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unsigned long arch_local_irq_save(void);
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void arch_local_irq_restore(unsigned long flags);
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void arch_local_irq_restore(unsigned long flags);
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#endif /* CONFIG_CPU_MIPSR2 || CONFIG_CPU_MIPSR6 */
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#endif /* CONFIG_CPU_HAS_DIEI */
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static inline void arch_local_irq_enable(void)
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static inline void arch_local_irq_enable(void)
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{
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{
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@ -102,7 +102,7 @@ static inline void arch_local_irq_enable(void)
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" .set push \n"
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" .set push \n"
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" .set reorder \n"
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" .set reorder \n"
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" .set noat \n"
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" .set noat \n"
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#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
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#if defined(CONFIG_CPU_HAS_DIEI)
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" ei \n"
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" ei \n"
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#else
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#else
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" mfc0 $1,$12 \n"
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" mfc0 $1,$12 \n"
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@ -15,7 +15,7 @@
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#include <linux/export.h>
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#include <linux/export.h>
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#include <linux/stringify.h>
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#include <linux/stringify.h>
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#if !defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_CPU_MIPSR6)
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#if !defined(CONFIG_CPU_HAS_DIEI)
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/*
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/*
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* For cli() we have to insert nops to make sure that the new value
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* For cli() we have to insert nops to make sure that the new value
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@ -110,4 +110,4 @@ notrace void arch_local_irq_restore(unsigned long flags)
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}
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}
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EXPORT_SYMBOL(arch_local_irq_restore);
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EXPORT_SYMBOL(arch_local_irq_restore);
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#endif /* !CONFIG_CPU_MIPSR2 && !CONFIG_CPU_MIPSR6 */
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#endif /* !CONFIG_CPU_HAS_DIEI */
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