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Remove the use of ulContext and a controlled SVC stack pointer for the port

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This commit is contained in:
Soren Ptak 2024-01-03 17:04:10 -05:00
parent ae127206fa
commit d23078088c
3 changed files with 84 additions and 110 deletions
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11
portable/GCC/ARM_CRx_MPU/portmacro_asm.h
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@ -479,12 +479,12 @@ extern "C" {
/** @brief The length in ulContext for the General Purpose Registers in bytes
* @note There are 13 GPRs, R0-R12 each is 32 bits, so 13 registers * 4 Bytes each
*/
#define portGPR_LENGTH ( 13U * 4U )
#define portGPR_LENGTH ( 15U * 4U )
/** @brief The length in ulContext for all the registers in a context
* @note There are the 13 GPRs, the Stack Pointer, and the Link Register
*/
#define portREGISTER_CONTEXT_LENGTH ( portGPR_LENGTH + ( 2 * 4U ) )
#define portREGISTER_CONTEXT_LENGTH ( ( 16 * 4U ) )
/** If you KNOW that your system will not utilize the FPU in any capacity
* you can set portENABLE_FPU to 0, which will reduce the per-task RAM usage
@ -512,18 +512,17 @@ extern "C" {
* ulContext[ 48 ]: Link Register
* ulContext[ 49 ]: Program Counter
* ulContext[ 50 ]: Current Program Status and Control Register
* ulContext[ 51 ]: Supervisor Mode SRS PC Scratch Space
* ulContext[ 52 ]: Supervisor Mode SRS CPSR Scratch Space
*/
#define portENABLE_FPU configENABLE_FPU
#if( portENABLE_FPU == 1 )
/** @brief Length of a Task's Register Context when using an FPU. */
#define MAX_CONTEXT_SIZE 52U
#define MAX_CONTEXT_SIZE 50U
#else
/** @brief Length of a Task's Register Context when not using an FPU. */
#define MAX_CONTEXT_SIZE 20U
#define MAX_CONTEXT_SIZE 18U
#endif
/** @brief Numerical offset from the start of a TCB to xSystemCallStackInfo
* @note In the exception handlers it is necessary to load this variable from the TCB.
* This provides an easy way for the exception handlers to get this structure.