diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/asm.rs | 10 | ||||
| -rw-r--r-- | src/register/msp.rs | 18 |
2 files changed, 28 insertions, 0 deletions
@@ -154,3 +154,13 @@ pub fn ttat(addr: *mut u32) -> u32 { let addr = addr as u32; call_asm!(__ttat(addr: u32) -> u32) } + +/// Branch and Exchange Non-secure +/// +/// See section C2.4.26 of Armv8-M Architecture Reference Manual for details. +/// Undefined if executed in Non-Secure state. +#[inline] +#[cfg(armv8m)] +pub unsafe fn bx_ns(addr: u32) { + call_asm!(__bxns(addr: u32)); +} diff --git a/src/register/msp.rs b/src/register/msp.rs index 275023d..2e8261e 100644 --- a/src/register/msp.rs +++ b/src/register/msp.rs @@ -11,3 +11,21 @@ pub fn read() -> u32 { pub unsafe fn write(bits: u32) { call_asm!(__msp_w(bits: u32)); } + +/// Reads the Non-Secure CPU register from Secure state. +/// +/// Executing this function in Non-Secure state will return zeroes. +#[cfg(armv8m)] +#[inline] +pub fn read_ns() -> u32 { + call_asm!(__msp_ns_r() -> u32) +} + +/// Writes `bits` to the Non-Secure CPU register from Secure state. +/// +/// Executing this function in Non-Secure state will be ignored. +#[cfg(armv8m)] +#[inline] +pub unsafe fn write_ns(bits: u32) { + call_asm!(__msp_ns_w(bits: u32)); +} |