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The secure monitor provides two top level handlers of which each provides a range of sub handlers.
The secure monitor provides two top level handlers of which each provides a range of sub handlers.
Secure Monitor Calls follow the ARM SMC calling convention:
{| class=wikitable
! Bit number || Bit mask || Description
|-
| 31 || 0x80000000 || Set to 0 means Yielding Call; Set to 1 means Fast Call.
|-
| 30 || 0x40000000 || Set to 0 means SMC32 convention; Set to 1 means SMC64.
|-
| 29-24 || 0x3F000000 || Service Call ranges.
|-
| 23-16 || 0x00FF0000 || Must be zero.
|-
| 15-0 || 0x0000FFFF || Function number within the range call type.
|}
== Id 0 ==
== Id 0 ==
! Sub-Id || Name || In || Out
! Sub-Id || Name || In || Out
|-
|-
| 0xC4000001 || oyasumi || ||
| 0xC4000001 || CPU_SUSPEND (oyasumi) || ||
|-
|-
| 0x84000002 || || ||
| 0x84000002 || CPU_OFF || ||
|-
|-
| 0xC4000003 || || ||
| 0xC4000003 || CPU_ON || ||
|-
|-
| 0xC3000004 || (Same as Id 0 Sub-Id 2.) || ||
| 0xC3000004 || (Same as Id 0 Sub-Id 2.) || ||