4344e27c26
Update reserved function names starting with one underscore, replacing them as follows: '_k_' with 'z_' '_K_' with 'Z_' '_handler_' with 'z_handl_' '_Cstart' with 'z_cstart' '_Swap' with 'z_swap' This renaming is done on both global and those static function names in kernel/include and include/. Other static function names in kernel/ are renamed by removing the leading underscore. Other function names not starting with any prefix listed above are renamed starting with a 'z_' or 'Z_' prefix. Function names starting with two or three leading underscores are not automatcally renamed since these names will collide with the variants with two or three leading underscores. Various generator scripts have also been updated as well as perf, linker and usb files. These are drivers/serial/uart_handlers.c include/linker/kobject-text.ld kernel/include/syscall_handler.h scripts/gen_kobject_list.py scripts/gen_syscall_header.py Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
99 lines
2.3 KiB
ArmAsm
99 lines
2.3 KiB
ArmAsm
/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief ARM Cortex-M exception/interrupt exit API
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*
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*
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* Provides functions for performing kernel handling when exiting exceptions or
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* interrupts that are installed directly in the vector table (i.e. that are not
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* wrapped around by _isr_wrapper()).
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*/
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#include <kernel_structs.h>
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#include <offsets_short.h>
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#include <toolchain.h>
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#include <arch/cpu.h>
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_ASM_FILE_PROLOGUE
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GTEXT(z_ExcExit)
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GTEXT(_IntExit)
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GDATA(_kernel)
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/**
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*
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* @brief Kernel housekeeping when exiting interrupt handler installed
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* directly in vector table
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*
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* Kernel allows installing interrupt handlers (ISRs) directly into the vector
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* table to get the lowest interrupt latency possible. This allows the ISR to be
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* invoked directly without going through a software interrupt table. However,
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* upon exiting the ISR, some kernel work must still be performed, namely
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* possible context switching. While ISRs connected in the software interrupt
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* table do this automatically via a wrapper, ISRs connected directly in the
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* vector table must invoke _IntExit() as the *very last* action before
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* returning.
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*
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* e.g.
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*
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* void myISR(void)
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* {
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* printk("in %s\n", __FUNCTION__);
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* doStuff();
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* _IntExit();
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* }
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*
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* @return N/A
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*/
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SECTION_SUBSEC_FUNC(TEXT, _HandlerModeExit, _IntExit)
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/* _IntExit falls through to z_ExcExit (they are aliases of each other) */
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/**
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*
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* @brief Kernel housekeeping when exiting exception handler installed
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* directly in vector table
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*
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* See _IntExit().
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*
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* @return N/A
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*/
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SECTION_SUBSEC_FUNC(TEXT, _HandlerModeExit, z_ExcExit)
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#ifdef CONFIG_PREEMPT_ENABLED
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ldr r0, =_kernel
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ldr r1, [r0, #_kernel_offset_to_current]
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ldr r0, [r0, _kernel_offset_to_ready_q_cache]
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cmp r0, r1
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beq _EXIT_EXC
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/* context switch required, pend the PendSV exception */
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ldr r1, =_SCS_ICSR
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ldr r2, =_SCS_ICSR_PENDSV
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str r2, [r1]
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_ExcExitWithGdbStub:
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_EXIT_EXC:
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#endif /* CONFIG_PREEMPT_ENABLED */
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#ifdef CONFIG_STACK_SENTINEL
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push {r0, lr}
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bl z_check_stack_sentinel
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#if defined(CONFIG_ARMV6_M_ARMV8_M_BASELINE)
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pop {r0, r1}
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mov lr, r1
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#else
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pop {r0, lr}
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#endif /* CONFIG_ARMV6_M_ARMV8_M_BASELINE */
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#endif /* CONFIG_STACK_SENTINEL */
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bx lr
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