| /* |
| * ------------------------------------------- |
| * CC3220 SDK - v0.10.00.00 |
| * ------------------------------------------- |
| * |
| * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the |
| * distribution. |
| * |
| * Neither the name of Texas Instruments Incorporated nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| //***************************************************************************** |
| // |
| // cpu.c |
| // |
| // Instruction wrappers for special CPU instructions needed by the |
| // |
| // |
| //***************************************************************************** |
| #include "cpu.h" |
| |
| //***************************************************************************** |
| // |
| // Wrapper function for the CPSID instruction. Returns the state of PRIMASK |
| // on entry. |
| // |
| //***************************************************************************** |
| #if defined(gcc) |
| unsigned long __attribute__((naked)) |
| CPUcpsid(void) |
| { |
| unsigned long ulRet; |
| |
| // |
| // Read PRIMASK and disable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " cpsid i\n" |
| " dsb \n" |
| " isb \n" |
| " bx lr\n" |
| : "=r" (ulRet)); |
| |
| // |
| // The return is handled in the inline assembly, but the compiler will |
| // still complain if there is not an explicit return here (despite the fact |
| // that this does not result in any code being produced because of the |
| // naked attribute). |
| // |
| return(ulRet); |
| } |
| #endif |
| #if defined(ewarm) |
| unsigned long |
| CPUcpsid(void) |
| { |
| // |
| // Read PRIMASK and disable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " cpsid i\n" |
| " dsb \n" |
| " isb \n"); |
| |
| // |
| // "Warning[Pe940]: missing return statement at end of non-void function" |
| // is suppressed here to avoid putting a "bx lr" in the inline assembly |
| // above and a superfluous return statement here. |
| // |
| #pragma diag_suppress=Pe940 |
| } |
| #pragma diag_default=Pe940 |
| #endif |
| #if defined(ccs) |
| unsigned long |
| CPUcpsid(void) |
| { |
| // |
| // Read PRIMASK and disable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " cpsid i\n" |
| " dsb \n" |
| " isb \n" |
| " bx lr\n"); |
| |
| // |
| // The following keeps the compiler happy, because it wants to see a |
| // return value from this function. It will generate code to return |
| // a zero. However, the real return is the "bx lr" above, so the |
| // return(0) is never executed and the function returns with the value |
| // you expect in R0. |
| // |
| return(0); |
| } |
| #endif |
| |
| //***************************************************************************** |
| // |
| // Wrapper function returning the state of PRIMASK (indicating whether |
| // interrupts are enabled or disabled). |
| // |
| //***************************************************************************** |
| #if defined(gcc) |
| unsigned long __attribute__((naked)) |
| CPUprimask(void) |
| { |
| unsigned long ulRet; |
| |
| // |
| // Read PRIMASK and disable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " bx lr\n" |
| : "=r" (ulRet)); |
| |
| // |
| // The return is handled in the inline assembly, but the compiler will |
| // still complain if there is not an explicit return here (despite the fact |
| // that this does not result in any code being produced because of the |
| // naked attribute). |
| // |
| return(ulRet); |
| } |
| #endif |
| #if defined(ewarm) |
| unsigned long |
| CPUprimask(void) |
| { |
| // |
| // Read PRIMASK and disable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n"); |
| |
| // |
| // "Warning[Pe940]: missing return statement at end of non-void function" |
| // is suppressed here to avoid putting a "bx lr" in the inline assembly |
| // above and a superfluous return statement here. |
| // |
| #pragma diag_suppress=Pe940 |
| } |
| #pragma diag_default=Pe940 |
| #endif |
| #if defined(ccs) |
| unsigned long |
| CPUprimask(void) |
| { |
| // |
| // Read PRIMASK and disable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " bx lr\n"); |
| |
| // |
| // The following keeps the compiler happy, because it wants to see a |
| // return value from this function. It will generate code to return |
| // a zero. However, the real return is the "bx lr" above, so the |
| // return(0) is never executed and the function returns with the value |
| // you expect in R0. |
| // |
| return(0); |
| } |
| #endif |
| |
| //***************************************************************************** |
| // |
| // Wrapper function for the CPSIE instruction. Returns the state of PRIMASK |
| // on entry. |
| // |
| //***************************************************************************** |
| #if defined(gcc) |
| unsigned long __attribute__((naked)) |
| CPUcpsie(void) |
| { |
| unsigned long ulRet; |
| |
| // |
| // Read PRIMASK and enable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " cpsie i\n" |
| " dsb \n" |
| " isb \n" |
| " bx lr\n" |
| : "=r" (ulRet)); |
| |
| // |
| // The return is handled in the inline assembly, but the compiler will |
| // still complain if there is not an explicit return here (despite the fact |
| // that this does not result in any code being produced because of the |
| // naked attribute). |
| // |
| return(ulRet); |
| } |
| #endif |
| #if defined(ewarm) |
| unsigned long |
| CPUcpsie(void) |
| { |
| // |
| // Read PRIMASK and enable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " cpsie i\n" |
| " dsb \n" |
| " isb \n"); |
| |
| // |
| // "Warning[Pe940]: missing return statement at end of non-void function" |
| // is suppressed here to avoid putting a "bx lr" in the inline assembly |
| // above and a superfluous return statement here. |
| // |
| #pragma diag_suppress=Pe940 |
| } |
| #pragma diag_default=Pe940 |
| #endif |
| #if defined(ccs) |
| unsigned long |
| CPUcpsie(void) |
| { |
| // |
| // Read PRIMASK and enable interrupts. |
| // |
| __asm(" mrs r0, PRIMASK\n" |
| " cpsie i\n" |
| " dsb \n" |
| " isb \n" |
| " bx lr\n"); |
| |
| // |
| // The following keeps the compiler happy, because it wants to see a |
| // return value from this function. It will generate code to return |
| // a zero. However, the real return is the "bx lr" above, so the |
| // return(0) is never executed and the function returns with the value |
| // you expect in R0. |
| // |
| return(0); |
| } |
| #endif |
| |
| //***************************************************************************** |
| // |
| // Wrapper function for the WFI instruction. |
| // |
| //***************************************************************************** |
| #if defined(gcc) |
| void __attribute__((naked)) |
| CPUwfi(void) |
| { |
| // |
| // Wait for the next interrupt. |
| // |
| __asm(" dsb \n" |
| " isb \n" |
| " wfi \n" |
| " bx lr\n"); |
| } |
| #endif |
| #if defined(ewarm) |
| void |
| CPUwfi(void) |
| { |
| // |
| // Wait for the next interrupt. |
| // |
| __asm(" dsb \n" |
| " isb \n" |
| " wfi \n"); |
| } |
| #endif |
| #if defined(ccs) |
| void |
| CPUwfi(void) |
| { |
| // |
| // Wait for the next interrupt. |
| // |
| __asm(" dsb \n" |
| " isb \n" |
| " wfi \n"); |
| } |
| #endif |
| |
| //***************************************************************************** |
| // |
| // Wrapper function for writing the BASEPRI register. |
| // |
| //***************************************************************************** |
| #if defined(gcc) |
| void __attribute__((naked)) |
| CPUbasepriSet(unsigned long ulNewBasepri) |
| { |
| |
| // |
| // Set the BASEPRI register |
| // |
| __asm(" msr BASEPRI, r0\n" |
| " dsb \n" |
| " isb \n" |
| " bx lr\n"); |
| } |
| #endif |
| #if defined(ewarm) |
| void |
| CPUbasepriSet(unsigned long ulNewBasepri) |
| { |
| // |
| // Set the BASEPRI register |
| // |
| __asm(" msr BASEPRI, r0\n" |
| " dsb \n" |
| " isb \n"); |
| } |
| #endif |
| #if defined(ccs) |
| void |
| CPUbasepriSet(unsigned long ulNewBasepri) |
| { |
| // |
| // Set the BASEPRI register |
| // |
| __asm(" msr BASEPRI, r0\n" |
| " dsb \n" |
| " isb \n"); |
| } |
| #endif |
| |
| //***************************************************************************** |
| // |
| // Wrapper function for reading the BASEPRI register. |
| // |
| //***************************************************************************** |
| #if defined(gcc) |
| unsigned long __attribute__((naked)) |
| CPUbasepriGet(void) |
| { |
| unsigned long ulRet; |
| |
| // |
| // Read BASEPRI |
| // |
| __asm(" mrs r0, BASEPRI\n" |
| " bx lr\n" |
| : "=r" (ulRet)); |
| |
| // |
| // The return is handled in the inline assembly, but the compiler will |
| // still complain if there is not an explicit return here (despite the fact |
| // that this does not result in any code being produced because of the |
| // naked attribute). |
| // |
| return(ulRet); |
| } |
| #endif |
| #if defined(ewarm) |
| unsigned long |
| CPUbasepriGet(void) |
| { |
| // |
| // Read BASEPRI |
| // |
| __asm(" mrs r0, BASEPRI\n"); |
| |
| // |
| // "Warning[Pe940]: missing return statement at end of non-void function" |
| // is suppressed here to avoid putting a "bx lr" in the inline assembly |
| // above and a superfluous return statement here. |
| // |
| #pragma diag_suppress=Pe940 |
| } |
| #pragma diag_default=Pe940 |
| #endif |
| #if defined(ccs) |
| unsigned long |
| CPUbasepriGet(void) |
| { |
| // |
| // Read BASEPRI |
| // |
| __asm(" mrs r0, BASEPRI\n" |
| " bx lr\n"); |
| |
| // |
| // The following keeps the compiler happy, because it wants to see a |
| // return value from this function. It will generate code to return |
| // a zero. However, the real return is the "bx lr" above, so the |
| // return(0) is never executed and the function returns with the value |
| // you expect in R0. |
| // |
| return(0); |
| } |
| #endif |
