;****************************************************************************** ; ;! @file startup_apollo1.s ;! ;! @brief Definitions for Apollo1 interrupt handlers, the vector table, and the stack. ; ;****************************************************************************** ;****************************************************************************** ; ; Copyright (c) 2020, Ambiq Micro, Inc. ; All rights reserved. ; ; Redistribution and use in source and binary forms, with or without ; modification, are permitted provided that the following conditions are met: ; ; 1. Redistributions of source code must retain the above copyright notice, ; this list of conditions and the following disclaimer. ; ; 2. 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. ; ; 3. Neither the name of the copyright holder nor the names of its ; contributors may be used to endorse or promote products derived from this ; software without specific prior written permission. ; ; Third party software included in this distribution is subject to the ; additional license terms as defined in the /docs/licenses directory. ; ; 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 HOLDER 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. ; ; This is part of revision 2.5.1 of the AmbiqSuite Development Package. ; ;****************************************************************************** ;****************************************************************************** ; ; Stack Size (in Bytes) <0x0-0xFFFFFFFF:8> ;************************************************************************ Stack EQU 0x00000400 ;****************************************************************************** ; ; Heap Size (in Bytes) <0x0-0xFFFFFFFF:8> ; ;****************************************************************************** Heap EQU 0x00000000 ;****************************************************************************** ; ; Allocate space for the stack. ; ;****************************************************************************** AREA STACK, NOINIT, READWRITE, ALIGN=3 StackMem SPACE Stack __initial_sp ;****************************************************************************** ; ; Allocate space for the heap. ; ;****************************************************************************** AREA HEAP, NOINIT, READWRITE, ALIGN=3 __heap_base HeapMem SPACE Heap __heap_limit ;****************************************************************************** ; ; Indicate that the code in this file preserves 8-byte alignment of the stack. ; ;****************************************************************************** PRESERVE8 ;****************************************************************************** ; ; Place code into the reset code section. ; ;****************************************************************************** AREA RESET, CODE, READONLY THUMB ;****************************************************************************** ; ; The vector table. ; ;****************************************************************************** ; ; Note: Aliasing and weakly exporting am_mpufault_isr, am_busfault_isr, and ; am_usagefault_isr does not work if am_fault_isr is defined externally. ; Therefore, we'll explicitly use am_fault_isr in the table for those vectors. ; EXPORT __Vectors __Vectors DCD StackMem + Stack ; Top of Stack DCD Reset_Handler ; Reset Handler DCD am_nmi_isr ; NMI Handler DCD am_fault_isr ; Hard Fault Handler DCD am_fault_isr ; The MPU fault handler DCD am_fault_isr ; The bus fault handler DCD am_fault_isr ; The usage fault handler DCD 0 ; Reserved DCD 0 ; Reserved DCD 0 ; Reserved DCD 0 ; Reserved DCD am_svcall_isr ; SVCall handler DCD am_debugmon_isr ; Debug monitor handler DCD 0 ; Reserved DCD am_pendsv_isr ; The PendSV handler DCD am_systick_isr ; The SysTick handler ; ; Peripheral Interrupts ; DCD am_brownout_isr ; 0: Reserved DCD am_watchdog_isr ; 1: Reserved DCD am_clkgen_isr ; 2: CLKGEN DCD am_vcomp_isr ; 3: Voltage Comparator DCD am_ioslave_ios_isr ; 4: I/O Slave general DCD am_ioslave_acc_isr ; 5: I/O Slave access DCD am_iomaster0_isr ; 6: I/O Master 0 DCD am_iomaster1_isr ; 7: I/O Master 1 DCD am_adc_isr ; 8: Reserved DCD am_gpio_isr ; 9: GPIO DCD am_ctimer_isr ; 10: CTIMER DCD am_uart_isr ; 11: UART __Vectors_End __Vectors_Size EQU __Vectors_End - __Vectors ;****************************************************************************** ; ; This is the code that gets called when the processor first starts execution ; following a reset event. ; ;****************************************************************************** Reset_Handler PROC EXPORT Reset_Handler [WEAK] IMPORT __main ; ; Enable the FPU. ; MOVW R0, #0xED88 MOVT R0, #0xE000 LDR R1, [R0] ORR R1, #0x00F00000 STR R1, [R0] DSB ISB ; ; Branch to main. ; LDR R0, =__main BX R0 ENDP ;****************************************************************************** ; ; Weak Exception Handlers. ; ;****************************************************************************** am_nmi_isr PROC EXPORT am_nmi_isr [WEAK] B . ENDP am_fault_isr\ PROC EXPORT am_fault_isr [WEAK] B . ENDP am_memmanage_isr\ PROC EXPORT am_memmanage_isr [WEAK] B . ENDP am_default_isr\ PROC EXPORT am_svcall_isr [WEAK] EXPORT am_debugmon_isr [WEAK] EXPORT am_pendsv_isr [WEAK] EXPORT am_systick_isr [WEAK] EXPORT am_brownout_isr [WEAK] EXPORT am_adc_isr [WEAK] EXPORT am_watchdog_isr [WEAK] EXPORT am_clkgen_isr [WEAK] EXPORT am_vcomp_isr [WEAK] EXPORT am_ioslave_ios_isr [WEAK] EXPORT am_ioslave_acc_isr [WEAK] EXPORT am_iomaster0_isr [WEAK] EXPORT am_iomaster1_isr [WEAK] EXPORT am_gpio_isr [WEAK] EXPORT am_ctimer_isr [WEAK] EXPORT am_uart_isr [WEAK] am_svcall_isr am_debugmon_isr am_pendsv_isr am_systick_isr am_brownout_isr am_adc_isr am_watchdog_isr am_clkgen_isr am_vcomp_isr am_ioslave_ios_isr am_ioslave_acc_isr am_iomaster0_isr am_iomaster1_isr am_gpio_isr am_ctimer_isr am_uart_isr ; all device interrupts go here unless the weak label is over ; ridden in the linker hard spin so the debugger will know it ; was an unhandled interrupt request a come-from-buffer or ; instruction trace hardware would sure be nice if you get here B . ENDP ;****************************************************************************** ; ; Align the end of the section. ; ;****************************************************************************** ALIGN ;****************************************************************************** ; ; Initialization of the heap and stack. ; ;****************************************************************************** AREA |.text|, CODE, READONLY ;****************************************************************************** ; ; User Initial Stack & Heap. ; ;****************************************************************************** IF :DEF: __MICROLIB EXPORT __initial_sp EXPORT __heap_base EXPORT __heap_limit ELSE IMPORT __use_two_region_memory EXPORT __user_initial_stackheap __user_initial_stackheap PROC LDR R0, =HeapMem LDR R1, =(StackMem + Stack) LDR R2, =(HeapMem + Heap) LDR R3, =StackMem BX LR ENDP ENDIF ;****************************************************************************** ; ; Align the end of the section. ; ;****************************************************************************** ALIGN ;****************************************************************************** ; ; All Done ; ;****************************************************************************** END