diff options
Diffstat (limited to 'test/tx/cmake/module_qemu/src/startup.S')
| -rw-r--r-- | test/tx/cmake/module_qemu/src/startup.S | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/test/tx/cmake/module_qemu/src/startup.S b/test/tx/cmake/module_qemu/src/startup.S new file mode 100644 index 00000000..f2f8442b --- /dev/null +++ b/test/tx/cmake/module_qemu/src/startup.S @@ -0,0 +1,93 @@ +/*************************************************************************** + * Copyright (c) 2026 Eclipse ThreadX contributors + * + * This program and the accompanying materials are made available under the + * terms of the MIT License which is available at + * https://opensource.org/licenses/MIT. + * + * AI Disclosure: This file was largely AI-generated by Claude Code (Opus 5.5). + * The AI-generated portions may be considered public domain (CC0-1.0) + * and not subject to the project's licence. The human contributor has + * reviewed and verified that the code is correct. + * + * SPDX-License-Identifier: MIT and CC0-1.0 + **************************************************************************/ + +@ Vector table and reset handler for the module execution harness on QEMU's +@ MPS2 boards. The fault vectors go to the module port's handlers, which is +@ the point: a module's MemManage fault has to reach the Module Manager for the +@ fault-notification test to mean anything. HardFault is never expected and +@ goes to the harness, which reports it and fails the image. + + .syntax unified + .thumb + + .section .vectors, "a" + .align 2 + .global _vectors +_vectors: + .word __stack_end__ @ Initial main stack pointer + .word reset_handler @ Reset + .word harness_unexpected_exception @ NMI + .word harness_hard_fault @ HardFault + .word MemManage_Handler @ MemManage, module port + .word BusFault_Handler @ BusFault, module port + .word UsageFault_Handler @ UsageFault, module port + .word 0 + .word 0 + .word 0 + .word 0 + .word __tx_SVCallHandler @ SVCall, module port + .word harness_unexpected_exception @ Debug monitor + .word 0 + .word __tx_PendSVHandler @ PendSV, module port + .word __tx_SysTickHandler @ SysTick, tx_initialize_low_level.S + .rept 32 + .word harness_unexpected_exception @ External interrupts, none enabled + .endr + + .section .text.reset_handler, "ax" + .align 2 + .global reset_handler + .thumb_func +reset_handler: + + @ Copy initialised data from its load address to RAM. + + LDR r0, =__data_load_start__ + LDR r1, =__data_start__ + LDR r2, =__data_end__ +copy_data: + CMP r1, r2 + BHS copy_data_done + LDR r3, [r0], #4 + STR r3, [r1], #4 + B copy_data +copy_data_done: + + @ Zero the uninitialised data. + + LDR r1, =__bss_start__ + LDR r2, =__bss_end__ + MOV r3, #0 +zero_bss: + CMP r1, r2 + BHS zero_bss_done + STR r3, [r1], #4 + B zero_bss +zero_bss_done: + +#ifdef __ARM_FP + @ Grant full access to CP10 and CP11 before anything touches the FPU. + + LDR r0, =0xE000ED88 @ CPACR + LDR r1, [r0] + ORR r1, r1, #(0xF << 20) + STR r1, [r0] + DSB + ISB +#endif + + BL main +reset_hang: + B reset_hang |