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abrodkin avatar abrodkin commented on June 30, 2024

Did you mean something like that (https://elixir.bootlin.com/u-boot/latest/source/arch/arc/lib/start.S)?

__KEEPIDENTS__B(__KEEPIDENTS__C)
	/* Setup interrupt vector base that matches "__text_start" */
	sr	__KEEPIDENTS__D, [__KEEPIDENTS__E]

	; Disable/enable I-__KEEPIDENTS__F according to configuration
	__KEEPIDENTS__G	__KEEPIDENTS__H, [__KEEPIDENTS__I]
	breq	__KEEPIDENTS__J, 0, 1f		; I$ doesn't exist
	lr	r5, [ARC_AUX_IC_CTRL]
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
	bclr	r5, r5, 0		; 0 - Enable, 1 is Disable
#else
	bset	r5, r5, 0		; I$ exists, but is not used
#endif
	sr	r5, [ARC_AUX_IC_CTRL]

Note all that nonsense of __KEEPIDENTS__ :)
In reality it should be like that ():

ENTRY(_start)
	/* Setup interrupt vector base that matches "__text_start" */
	sr	__ivt_start, [ARC_AUX_INTR_VEC_BASE]

	; Disable/enable I-cache according to configuration
	lr	r5, [ARC_BCR_IC_BUILD]
	breq	r5, 0, 1f		; I$ doesn't exist
	lr	r5, [ARC_AUX_IC_CTRL]
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
	bclr	r5, r5, 0		; 0 - Enable, 1 is Disable
#else
	bset	r5, r5, 0		; I$ exists, but is not used
#endif
	sr	r5, [ARC_AUX_IC_CTRL]

from elixir.

michaelopdenacker avatar michaelopdenacker commented on June 30, 2024

Apparently closed in version 2.0

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abrodkin avatar abrodkin commented on June 30, 2024

Indeed I do see it all correct now https://elixir.bootlin.com/u-boot/latest/source/arch/arc/lib/start.S

ENTRY(_start)
	/* Setup interrupt vector base that matches "__text_start" */
	sr	__ivt_start, [ARC_AUX_INTR_VEC_BASE]

	; Disable/enable I-cache according to configuration
	lr	r5, [ARC_BCR_IC_BUILD]
	breq	r5, 0, 1f		; I$ doesn't exist
	lr	r5, [ARC_AUX_IC_CTRL]
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
	bclr	r5, r5, 0		; 0 - Enable, 1 is Disable
#else
	bset	r5, r5, 0		; I$ exists, but is not used
#endif
	sr	r5, [ARC_AUX_IC_CTRL]

And thanks for all the fish! (C)

from elixir.

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