add CMSIS / Cortex-M instrinsics

library/stdarch/coresimd/arm/cmsis.rs

@@ -0,0 +1,264 @@
+#![allow(non_snake_case)]
+
+/// Extracted from [CMSIS 5]'s CMSIS/Core/Include/cmsis_gcc.h
+///
+/// [CMSIS 5]: https://github.com/ARM-software/CMSIS_5
+
+/* Core function access */
+
+/// Enable IRQ Interrupts
+///
+/// Enables IRQ interrupts by clearing the I-bit in the CPSR. Can only be
+/// executed in Privileged modes.
+#[inline(always)]
+pub unsafe fn __enable_irq() {
+    asm!("cpsie i" : : : "memory" : "volatile");
+}
+
+/// Disable IRQ Interrupts
+///
+/// Disables IRQ interrupts by setting the I-bit in the CPSR. Can only be
+/// executed in Privileged modes.
+#[inline(always)]
+pub unsafe fn __disable_irq() {
+    asm!("cpsid i" : : : "memory" : "volatile");
+}
+
+/// Get Control Register
+///
+/// Returns the content of the Control Register.
+#[inline(always)]
+pub unsafe fn __get_CONTROL() -> u32 {
+    let result: u32;
+    asm!("mrs $0, CONTROL" : "=r"(result) : : : "volatile");
+    result
+}
+
+/// Set Control Register
+///
+/// Writes the given value to the Control Register.
+#[inline(always)]
+pub unsafe fn __set_CONTROL(control: u32) {
+    asm!("msr CONTROL, $0" : : "r"(control) : "memory" : "volatile");
+}
+
+/// Get IPSR Register
+///
+/// Returns the content of the IPSR Register.
+#[inline(always)]
+pub unsafe fn __get_IPSR() -> u32 {
+    let result: u32;
+    asm!("mrs $0, IPSR" : "=r"(result) : : : "volatile");
+    result
+}
+
+/// Get APSR Register
+///
+/// Returns the content of the APSR Register.
+#[inline(always)]
+pub unsafe fn __get_APSR() -> u32 {
+    let result: u32;
+    asm!("mrs $0, APSR" : "=r"(result) : : : "volatile");
+    result
+}
+
+/// Get xPSR Register
+///
+/// Returns the content of the xPSR Register.
+#[inline(always)]
+pub unsafe fn __get_xPSR() -> u32 {
+    let result: u32;
+    asm!("mrs $0, XPSR" : "=r"(result) : : : "volatile");
+    result
+}
+
+/// Get Process Stack Pointer
+///
+/// Returns the current value of the Process Stack Pointer (PSP).
+#[inline(always)]
+pub unsafe fn __get_PSP() -> u32 {
+    let result: u32;
+    asm!("mrs $0, PSP" : "=r"(result) : : : "volatile");
+    result
+}
+
+/// Set Process Stack Pointer
+///
+/// Assigns the given value to the Process Stack Pointer (PSP).
+#[inline(always)]
+pub unsafe fn __set_PSP(top_of_proc_stack: u32) {
+    asm!("msr PSP, $0" : : "r"(top_of_proc_stack) : : "volatile");
+}
+
+/// Get Main Stack Pointer
+///
+/// Returns the current value of the Main Stack Pointer (MSP).
+#[inline(always)]
+pub unsafe fn __get_MSP() -> u32 {
+    let result: u32;
+    asm!("mrs $0, MSP" : "=r"(result) : : : "volatile");
+    result
+}
+
+/// Set Main Stack Pointer
+///
+/// Assigns the given value to the Main Stack Pointer (MSP).
+#[inline(always)]
+pub unsafe fn __set_MSP(top_of_main_stack: u32) {
+    asm!("msr MSP, $0" : : "r"(top_of_main_stack) : : "volatile");
+}
+
+/// Get Priority Mask
+///
+/// Returns the current state of the priority mask bit from the Priority Mask
+/// Register.
+#[inline(always)]
+pub unsafe fn __get_PRIMASK() -> u32 {
+    let result: u32;
+    asm!("mrs $0, PRIMASK" : "=r"(result) : : "memory" : "volatile");
+    result
+}
+
+/// Set Priority Mask
+///
+/// Assigns the given value to the Priority Mask Register.
+#[inline(always)]
+pub unsafe fn __set_PRIMASK(pri_mask: u32) {
+    asm!("msr PRIMASK, $0" : : "r"(pri_mask) : : "volatile");
+}
+
+#[cfg(target_feature = "v7")]
+mod v7 {
+    /// Enable FIQ
+    ///
+    /// Enables FIQ interrupts by clearing the F-bit in the CPSR. Can only be
+    /// executed in Privileged modes.
+    #[inline(always)]
+    pub unsafe fn __enable_fault_irq() {
+        asm!("cpsie f" : : : "memory" : "volatile");
+    }
+
+    /// Disable FIQ
+    ///
+    /// Disables FIQ interrupts by setting the F-bit in the CPSR. Can only be
+    /// executed in Privileged modes.
+    #[inline(always)]
+    pub unsafe fn __disable_fault_irq() {
+        asm!("cpsid f" : : : "memory" : "volatile");
+    }
+
+    /// Get Base Priority
+    ///
+    /// Returns the current value of the Base Priority register.
+    #[inline(always)]
+    pub unsafe fn __get_BASEPRI() -> u32 {
+        let result: u32;
+        asm!("mrs $0, BASEPRI" : "=r"(result) : : : "volatile");
+        result
+    }
+
+    /// Set Base Priority
+    ///
+    /// Assigns the given value to the Base Priority register.
+    #[inline(always)]
+    pub unsafe fn __set_BASEPRI(base_pri: u32) {
+        asm!("msr BASEPRI, $0" : : "r"(base_pri) : "memory" : "volatile");
+    }
+
+    /// Set Base Priority with condition
+    ///
+    /// Assigns the given value to the Base Priority register only if BASEPRI
+    /// masking is disabled, or the new value increases the BASEPRI
+    /// priority level.
+    #[inline(always)]
+    pub unsafe fn __set_BASEPRI_MAX(base_pri: u32) {
+        asm!("msr BASEPRI_MAX, $0" : : "r"(base_pri) : "memory" : "volatile");
+    }
+
+    /// Get Fault Mask
+    ///
+    /// Returns the current value of the Fault Mask register.
+    #[inline(always)]
+    pub unsafe fn __get_FAULTMASK() -> u32 {
+        let result: u32;
+        asm!("mrs $0, FAULTMASK" : "=r"(result) : : : "volatile");
+        result
+    }
+
+    /// Set Fault Mask
+    ///
+    /// Assigns the given value to the Fault Mask register.
+    #[inline(always)]
+    pub unsafe fn __set_FAULTMASK(fault_mask: u32) {
+        asm!("msr FAULTMASK, $0" : : "r"(fault_mask) : "memory" : "volatile");
+    }
+}
+
+#[cfg(target_feature = "v7")]
+pub use self::v7::*;
+
+/* Core instruction access */
+
+/// No Operation
+///
+/// No Operation does nothing. This instruction can be used for code alignment
+/// purposes.
+#[inline(always)]
+pub unsafe fn __NOP() {
+    asm!("nop" : : : : "volatile");
+}
+
+/// Wait For Interrupt
+///
+/// Wait For Interrupt is a hint instruction that suspends execution until one
+/// of a number of events occurs.
+#[inline(always)]
+pub unsafe fn __WFI() {
+    asm!("wfi" : : : : "volatile");
+}
+
+/// Wait For Event
+///
+/// Wait For Event is a hint instruction that permits the processor to enter a
+/// low-power state until one of a number of events occurs.
+#[inline(always)]
+pub unsafe fn __WFE() {
+    asm!("wfe" : : : : "volatile");
+}
+
+/// Send Event
+///
+/// Send Event is a hint instruction. It causes an event to be signaled to the
+/// CPU.
+#[inline(always)]
+pub unsafe fn __SEV() {
+    asm!("sev" : : : : "volatile");
+}
+
+/// Instruction Synchronization Barrier
+///
+/// Instruction Synchronization Barrier flushes the pipeline in the processor,
+/// so that all instructions following the ISB are fetched from cache or
+/// memory, after the instruction has been completed.
+#[inline(always)]
+pub unsafe fn __ISB() {
+    asm!("isb 0xF" : : : "memory" : "volatile");
+}
+
+/// Data Synchronization Barrier
+///
+/// Acts as a special kind of Data Memory Barrier. It completes when all
+/// explicit memory accesses before this instruction complete.
+#[inline(always)]
+pub unsafe fn __DSB() {
+    asm!("dsb 0xF" : : : "memory" : "volatile");
+}
+
+/// Data Memory Barrier
+///
+/// Ensures the apparent order of the explicit memory operations before and
+/// after the instruction, without ensuring their completion.
+#[inline(always)]
+pub unsafe fn __DMB() {
+    asm!("dmb 0xF" : : : "memory" : "volatile");
+}

library/stdarch/coresimd/arm/mod.rs

@@ -7,6 +7,11 @@
 //! [arm_dat]: https://developer.arm.com/technologies/neon/intrinsics
 #![allow(non_camel_case_types)]
 
+#[cfg(target_feature = "mclass")]
+mod cmsis;
+#[cfg(target_feature = "mclass")]
+pub use self::cmsis::*;
+
 mod v6;
 pub use self::v6::*;