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comparison src/cs/system/main/gcc/irq_twiddle.S @ 0:92470e5d0b9e

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src: partial import from FC Selenite
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 15 May 2020 01:28:16 +0000
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1 /*
2 * TI's L1 code (and possibly other parts of the software suite) calls
3 * functions named INT_DisableIRQ() and INT_EnableIRQ(); in TI's original
4 * fw they are implemented (in a very ugly manner, as usual) in the
5 * int.s entry point assembly module. Here we implement the same
6 * functions in a cleaner way.
7 */
8
9 #include "asm_defs.h"
10
11 .code 32
12 .text
13
14 .globl INT_DisableIRQ
15 INT_DisableIRQ:
16 mrs r0, CPSR
17 orr r0, r0, #LOCKOUT
18 msr CPSR, r0
19 bx lr
20
21 .globl INT_EnableIRQ
22 INT_EnableIRQ:
23 mrs r0, CPSR
24 bic r0, r0, #LOCKOUT
25 msr CPSR, r0
26 bx lr