29 lines
640 B
ArmAsm
29 lines
640 B
ArmAsm
#include "regdef.h"
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#include "csrdef.h"
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#include "tools-asm.h"
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#include "start.h"
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.global cpu_sleep
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cpu_sleep:
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SAVE_REGS_ALL(REGS_MEM)
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dbar 0
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li.w t1, PMU_BASE
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1: ld.w t0, t1,PMU_CommandW
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andi t0, t0, 0x1
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beqz t0, 1b
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st.w t0, t1,PMU_CommandW
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idle 0
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.global wakeup_reset
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wakeup_reset:
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la a0, msg_wakeup
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bl outputstring
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RESTORE_REGS_ALL(REGS_MEM)
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csrwr t0, CSR_KScratch1
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/*enable interrupt*/
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li.w t0, 0x4
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csrxchg t0, t0, CSR_CRMD //enter pmu_handler
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csrrd t0, CSR_KScratch1
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jirl zero, ra, 0
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