b31d241388
This should behave the same but is compatible with the ESP32-C3 which lacks the MIE CSR (but does have the MSTATUS CSR).
38 строки
1,3 КиБ
Go
38 строки
1,3 КиБ
Go
package riscv
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// Run the given assembly code. The code will be marked as having side effects,
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// as it doesn't produce output and thus would normally be eliminated by the
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// optimizer.
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func Asm(asm string)
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// Run the given inline assembly. The code will be marked as having side
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// effects, as it would otherwise be optimized away. The inline assembly string
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// recognizes template values in the form {name}, like so:
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//
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// arm.AsmFull(
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// "st {value}, {result}",
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// map[string]interface{}{
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// "value": 1
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// "result": &dest,
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// })
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//
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// You can use {} in the asm string (which expands to a register) to set the
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// return value.
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func AsmFull(asm string, regs map[string]interface{}) uintptr
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// DisableInterrupts disables all interrupts, and returns the old interrupt
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// state.
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func DisableInterrupts() uintptr {
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// Note: this can be optimized with a CSRRW instruction, which atomically
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// swaps the value and returns the old value.
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mask := MSTATUS.Get()
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MSTATUS.ClearBits(1 << 3) // clear the MIE bit
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return mask
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}
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// EnableInterrupts enables all interrupts again. The value passed in must be
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// the mask returned by DisableInterrupts.
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func EnableInterrupts(mask uintptr) {
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mask &= 1 << 3 // clear all bits except for the MIE bit
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MSTATUS.SetBits(mask) // set the MIE bit, if it was previously cleared
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}
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