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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <chconf.h>
.set MODE_USR, 0x10
.set MODE_FIQ, 0x11
.set MODE_IRQ, 0x12
.set MODE_SVC, 0x13
.set MODE_ABT, 0x17
.set MODE_UND, 0x1B
.set MODE_SYS, 0x1F
.equ I_BIT, 0x80
.equ F_BIT, 0x40
.text
.code 32
.balign 4
#ifdef THUMB
.globl chSysLock
chSysLock:
msr CPSR_c, #MODE_SYS | I_BIT
bx lr
.globl chSysUnlock
chSysUnlock:
msr CPSR_c, #MODE_SYS
bx lr
#endif
.globl chSysSwitchI
chSysSwitchI:
#ifdef CH_CURRP_REGISTER_CACHE
stmfd sp!, {r4, r5, r6, r8, r9, r10, r11, lr}
str sp, [r0, #0]
ldr sp, [r1, #0]
#ifdef THUMB
ldmfd sp!, {r4, r5, r6, r8, r9, r10, r11, lr}
bx lr
#else
ldmfd sp!, {r4, r5, r6, r8, r9, r10, r11, pc}
#endif
#else
stmfd sp!, {r4, r5, r6, r7, r8, r9, r10, r11, lr}
str sp, [r0, #0]
ldr sp, [r1, #0]
#ifdef THUMB
ldmfd sp!, {r4, r5, r6, r7, r8, r9, r10, r11, lr}
bx lr
#else
ldmfd sp!, {r4, r5, r6, r7, r8, r9, r10, r11, pc}
#endif
#endif /* CH_CURRP_REGISTER_CACHE */
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