package sleep
import "mmio"
var scr = mmio.NewReg32(0xe000ed10)
func EventOnPend() bool {
return scr.Bit(4)
}
func EnableEventOnPend() {
scr.SetBit(4)
}
func DisableEventOnPend() {
scr.ClearBit(4)
}
func SleepDeep() bool {
return scr.Bit(2)
}
func EnableSleepDeep() {
scr.SetBit(2)
}
func DisableSleepDeep() {
scr.ClearBit(2)
}
func SleepOnExit() bool {
return scr.Bit(1)
}
"sync/barrier"
"unsafe"
)
// Vector represents element of interrupt table.
type Vector struct {
handler func()
}
// VectorFor returns Vector that correspods to the handler.
func VectorFor(handler func()) Vector {
return Vector{handler}
}
var (
vto = mmio.NewReg32(0xe000ed08)
activeVT []Vector
)
// UseTable instructs CPU to use vt as vector table. vt should be properly
// aligned. Minimum alignment is 32 words which is enough for up to 16 external
// interrupts. For more interrupts, adjust the alignment by rounding up to the
// next power of two. UseTable doesn't work for Cortex-M0.
//
// This function is designed to be used by runtime. You generaly shouldn't use
// it if MaxTask > 0 in your linker script.
func UseTable(vt []Vector) {
activeVT = vt
barrier.Memory()
vto.Store(uint32(uintptr(unsafe.Pointer(&vt[0]))))
}
_
PendSV // prio 5
SysTick // prio 6
)
// First external interrupt
const IRQ0 Exce = 16
var (
ise = (*bitReg)(unsafe.Pointer(uintptr(0xe000e100)))
ice = (*bitReg)(unsafe.Pointer(uintptr(0xe000e180)))
isp = (*bitReg)(unsafe.Pointer(uintptr(0xe000e200)))
icp = (*bitReg)(unsafe.Pointer(uintptr(0xe000e280)))
iab = (*bitReg)(unsafe.Pointer(uintptr(0xe000e300)))
ip = (*byteReg)(unsafe.Pointer(uintptr(0xe000e400)))
ics = mmio.NewReg32(0xe000ed04)
shp = (*byteReg)(unsafe.Pointer(uintptr(0xe000ed18)))
shcs = mmio.NewReg32(0xe000ed24)
sti = mmio.NewReg32(0xe000ef00)
)
// Enable enables handler for irq.
func (e Exce) Enable() {
switch {
case e >= MemFault && e <= UsageFault:
shcs.SetBit(int(18 - UsageFault + e))
case e >= IRQ0:
ise.setBit(e - IRQ0)
}
}
// +build cortexm4f
package fpu
import "mmio"
var cpac = mmio.NewReg32(0xe000ed88)
type Perm uint32
const (
Deny Perm = 0 << 20
Priv Perm = 1 << 20
Full Perm = 3 << 20
)
func SetAccess(p Perm) {
cpac.StoreBits(uint32(p), 3<<20)
}
func Access() Perm {
return Perm(cpac.LoadBits(3 << 20))
}
var fpcc = mmio.NewReg32(0xe000ef34)
// SPFlags control/describe FPU state preservation behavior during exception
// handling.
type SPFlags uint32
const (
DeferSP SPFlags = 1 << iota