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view src/cs/system/main/gcc/irq_twiddle.S @ 198:bb5aba57ecfb

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Condat backlight driver: actually allow switching levels We earlier made a change to this driver allowing different backlight levels to be set. However, the old backlight idle logic prevented switching from one backlight level to another without going through a fully-off state. Now that we have the beginnings of new backlight timer logic in BMI+MFW, the old idle logic in the Condat driver layer can be axed, and we fix that driver layer to allow free switching between different backlight levels.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 29 Mar 2021 01:52:48 +0000
parents 4e78acac3d88
children
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/*
 * TI's L1 code (and possibly other parts of the software suite) calls
 * functions named INT_DisableIRQ() and INT_EnableIRQ(); in TI's original
 * fw they are implemented (in a very ugly manner, as usual) in the
 * int.s entry point assembly module.  Here we implement the same
 * functions in a cleaner way.
 */

#include "asm_defs.h"

	.code 32
	.text

	.globl	INT_DisableIRQ
INT_DisableIRQ:
	mrs	r0, CPSR
	orr	r0, r0, #LOCKOUT
	msr	CPSR, r0
	bx	lr

	.globl	INT_EnableIRQ
INT_EnableIRQ:
	mrs	r0, CPSR
	bic	r0, r0, #LOCKOUT
	msr	CPSR, r0
	bx	lr