FreeCalypso > hg > freecalypso-citrine

view bsp/irq_twiddle.S @ 10:9ffe74065152

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
l1_trace.c: identify ourselves in the TST_C line
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 09 Jun 2016 06:30:12 +0000
parents 75a11d740a02
children
line wrap: on
line source

/*
 * TI's L1 code (and possibly other parts of the software suite) calls
 * functions named INT_DisableIRQ() and INT_EnableIRQ(); in the Leonardo
 * 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 "../nucleus/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