29 lines
796 B
C
29 lines
796 B
C
#ifndef _EXCEPTIONS_H_
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#define _EXCEPTIONS_H_
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#include <stdint.h>
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inline uint32_t set_ipl(uint32_t ipl)
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{
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uint32_t ret;
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__asm__ __volatile__(
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" move.w sr,%[ret]\r\n" /* retrieve status register */
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" andi.l #0x07,%[ipl]\n\t" /* mask out ipl bits on new value */
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" lsl.l #8,%[ipl]\n\t" /* shift them to position */
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" move.l %[ret],d0\n\t" /* retrieve original value */
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" andi.l #0x0000f8ff,d0\n\t" /* clear ipl part */
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" or.l %[ipl],d0\n\t" /* or in new value */
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" move.w d0,sr\n\t" /* put it in place */
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" andi.l #0x0700,%[ret]\r\n" /* mask out ipl bits */
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" lsr.l #8,%[ret]\r\n" /* shift them to position */
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: [ret] "+g" (ret) /* output */
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: [ipl] "r" (ipl) /* input */
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: "d0" /* clobber */
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);
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return ret;
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}
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#endif /* _EXCEPTIONS_H_ */
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