change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/arch/nds32/kernel/ex-entry.S
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@@ -7,6 +7,7 @@
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 #include <asm/errno.h>
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 #include <asm/asm-offsets.h>
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 #include <asm/page.h>
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+#include <asm/fpu.h>
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 #ifdef CONFIG_HWZOL
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 	.macro push_zol
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@@ -15,12 +16,31 @@
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 	mfusr	$r16, $LC
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 	.endm
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 #endif
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+	.macro  skip_save_fucop_ctl
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+#if defined(CONFIG_FPU)
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+skip_fucop_ctl:
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+	smw.adm $p0, [$sp], $p0, #0x1
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+	j fucop_ctl_done
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+#endif
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+	.endm
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 	.macro	save_user_regs
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-
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+#if defined(CONFIG_FPU)
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+	sethi   $p0, hi20(has_fpu)
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+	lbsi 	$p0, [$p0+lo12(has_fpu)]
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+	beqz	$p0, skip_fucop_ctl
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+	mfsr    $p0, $FUCOP_CTL
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+	smw.adm $p0, [$sp], $p0, #0x1
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+	bclr    $p0, $p0, #FUCOP_CTL_offCP0EN
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+	mtsr    $p0, $FUCOP_CTL
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+fucop_ctl_done:
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+	/* move $SP to the bottom of pt_regs */
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+	addi    $sp, $sp, -FUCOP_CTL_OFFSET
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+#else
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 	smw.adm $sp, [$sp], $sp, #0x1
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 	/* move $SP to the bottom of pt_regs */
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 	addi    $sp, $sp, -OSP_OFFSET
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+#endif
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 	/* push $r0 ~ $r25 */
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 	smw.bim $r0, [$sp], $r25
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@@ -79,6 +99,7 @@
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 	.long	eh_syscall		!Syscall
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 	.long	asm_do_IRQ		!IRQ
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+	skip_save_fucop_ctl
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 common_exception_handler:
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 	save_user_regs
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 	mfsr	$p0, $ITYPE
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@@ -103,7 +124,6 @@
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 	mtsr	$r21, $PSW
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 	dsb
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 	jr	$p1
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-
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 	/* syscall */
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 1:
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 	addi	$p1, $p0, #-NDS32_VECTOR_offEXCEPTION