62 lines
1.2 KiB
ArmAsm
62 lines
1.2 KiB
ArmAsm
.syntax unified
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.cpu cortex-m4
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.thumb
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.text
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.align 2
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@ global variable with the backup registers
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.extern vault_arm_registers
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@ global function that performs the wake up actions
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.extern pyb_sleep_suspend_exit
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@ uint sleep_store(void)
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.global sleep_store
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.thumb
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.thumb_func
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.type sleep_store, %function
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sleep_store:
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dsb
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isb
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push {r0-r12, lr}
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ldr r1, =vault_arm_registers
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mrs r0, msp
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str r0, [r1]
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mrs r0, psp
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str r0, [r1, #4]
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mrs r0, primask
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str r0, [r1, #12]
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mrs r0, faultmask
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str r0, [r1, #16]
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mrs r0, basepri
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str r0, [r1, #20]
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mrs r0, control
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str r0, [r1, #24]
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dsb
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isb
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bx lr
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@ uint sleep_restore(void)
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.global sleep_restore
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.thumb
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.thumb_func
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.type sleep_restore, %function
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sleep_restore:
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dsb
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isb
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mrs r0, msp
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msr psp, r0
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ldr r1, =vault_arm_registers
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ldr r0, [r1, #24]
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msr control, r0
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ldr r0, [r1]
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msr msp, r0
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ldr r0, [r1, #12]
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msr primask, r0
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ldr r0, [r1, #16]
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msr faultmask, r0
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ldr r0, [r1, #20]
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msr basepri, r0
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dsb
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isb
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bl pyb_sleep_suspend_exit
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