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Update system call entry mechanism (#896)

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Earlier the System Call entry from an unprivileged task looked like:

1. SVC for entering system call.
2. System call implementation.
3. SVC for exiting system call.

Now, the system call entry needs to make only one system call
and everything else is handled internally.

This PR also makes the following small changes:

1. Add one struct param for system calls with 5 parameters. This
   removes the need for special handling for system calls with 5
   parameters.
2. Remove raise privilege SVC when MPU wrapper v2 is used.
3. Add additional run time parameter checks to MPU wrappers
   for xTaskGenericNotify and xQueueTakeMutexRecursive APIs.

These changes are tested on the following platforms:
1. STM32H743ZI (Cortex-M7)
2. STM32L152RE (Cortex-M3)
3. Nuvoton M2351 (Cortex-M23)
4. NXP LPC55S69 (Cortex-M33)
This commit is contained in:
Gaurav-Aggarwal-AWS 2023-11-21 18:42:23 +05:30 • committed by GitHub
parent 52c1c6e578
commit 9bfd85a253
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115 changed files with 46168 additions and 54704 deletions
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3762
portable/GCC/ARM_CM3_MPU/mpu_wrappers_v2_asm.c
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856
portable/GCC/ARM_CM3_MPU/port.c Executable file → Normal file
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10
portable/GCC/ARM_CM3_MPU/portmacro.h
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@ -153,12 +153,10 @@
/*-----------------------------------------------------------*/
/* SVC numbers for various services. */
#define portSVC_START_SCHEDULER 0
#define portSVC_YIELD 1
#define portSVC_RAISE_PRIVILEGE 2
#define portSVC_SYSTEM_CALL_ENTER 3 /* System calls with upto 4 parameters. */
#define portSVC_SYSTEM_CALL_ENTER_1 4 /* System calls with 5 parameters. */
#define portSVC_SYSTEM_CALL_EXIT 5
#define portSVC_START_SCHEDULER 100
#define portSVC_YIELD 101
#define portSVC_RAISE_PRIVILEGE 102
#define portSVC_SYSTEM_CALL_EXIT 103
/* Scheduler utilities. */