.syntax unified
    .arch   armv8 - m.base

    .section .stack
    .align  3
#ifndef Stack_Size
    .equ    Stack_Size, 0x00000400
#endif
    .global __StackTop
    .global __StackLimit
__StackLimit:
    .space  Stack_Size
    .size   __StackLimit, . - __StackLimit
__StackTop:
    .size   __StackTop, . - __StackTop

    .section .heap
    .align  3
#ifndef Heap_Size
    .equ    Heap_Size, 0x00000100
#endif

    .global __HeapBase
    .global __HeapLimit
__HeapBase:
    .if Heap_Size
    .space  Heap_Size
    .endif
    .size   __HeapBase, . - __HeapBase
__HeapLimit:
    .size   __HeapLimit, . - __HeapLimit

    .section .vectors
    .align  2
    .global __Vectors
__Vectors:
    .long   __StackTop            /* Top of Stack */
    .long   Reset_Handler         /* Reset Handler */
    .long   NMI_Handler           /* NMI Handler */
    .long   HardFault_Handler     /* Hard Fault Handler */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   SVC_Handler           /* SVCall Handler */
    .long   0                     /* Reserved */
    .long   0                     /* Reserved */
    .long   PendSV_Handler        /* PendSV Handler */
    .long   SysTick_Handler       /* SysTick Handler */

    /* External interrupts */

    .long   BOD_IRQHandler
    .long   WDT_IRQHandler
    .long   EINT0_IRQHandler
    .long   EINT1_IRQHandler
    .long   GPAB_IRQHandler
    .long   GPCDF_IRQHandler
    .long   PWMA_IRQHandler
    .long   Default_Handler
    .long   TMR0_IRQHandler
    .long   TMR1_IRQHandler
    .long   TMR2_IRQHandler
    .long   TMR3_IRQHandler
    .long   UART0_IRQHandler
    .long   UART1_IRQHandler
    .long   SPI0_IRQHandler
    .long   SPI1_IRQHandler
    .long   SPI2_IRQHandler
    .long   SPI3_IRQHandler
    .long   I2C0_IRQHandler
    .long   I2C1_IRQHandler
    .long   CAN0_IRQHandler
    .long   CAN1_IRQHandler
    .long   SC012_IRQHandler
    .long   USBD_IRQHandler
    .long   PS2_IRQHandler
    .long   ACMP_IRQHandler
    .long   PDMA_IRQHandler
    .long   I2S_IRQHandler
    .long   PWRWU_IRQHandler
    .long   ADC_IRQHandler
    .long   Default_Handler
    .long   RTC_IRQHandler

    .size   __Vectors, . - __Vectors



    .text
    .thumb
    .thumb_func
    .align  2
    .global Reset_Handler
    .type   Reset_Handler, % function


Reset_Handler:
    /*  Single section scheme.
     *
     *  The ranges of copy from/to are specified by following symbols
     *    __etext: LMA of start of the section to copy from. Usually end of text
     *    __data_start__: VMA of start of the section to copy to
     *    __data_end__: VMA of end of the section to copy to
     *
     *  All addresses must be aligned to 4 bytes boundary.
     */
    ldr r1, = __etext
    ldr r2, = __data_start__
    ldr r3, = __data_end__

    subs    r3, r2
    ble .L_loop1_done
.L_loop1:
    subs    r3, #4
    ldr r0, [r1, r3]
    str r0, [r2, r3]
    bgt .L_loop1
.L_loop1_done:

    /*  Single BSS section scheme.
     *
     *  The BSS section is specified by following symbols
     *    __bss_start__: start of the BSS section.
     *    __bss_end__: end of the BSS section.
     *
     *  Both addresses must be aligned to 4 bytes boundary.
     */
    ldr r1, = __bss_start__
    ldr r2, = __bss_end__

    movs    r0, 0

    subs    r2, r1
    ble .L_loop3_done
.L_loop3:
    subs    r2, #4
    str r0, [r1, r2]
    bgt .L_loop3
.L_loop3_done:

    /* There's no SystemInit for NUC123, so no point making a pointless call */
    // bl  SystemInit

#ifndef __ENTRY
#define __ENTRY _entry
#endif
    bl  __ENTRY

    .pool
    .size   Reset_Handler, . - Reset_Handler

    .align  1
    .thumb_func
    .weak   Default_Handler
    .type   Default_Handler, % function

Default_Handler:
    b   .
    .size   Default_Handler, . - Default_Handler

    /*    Macro to define default handlers. Default handler
     *    will be weak symbol and just dead loops. They can be
     *    overwritten by other handlers */

    .macro  def_irq_handler handler_name
    .weak   \handler_name
    .set    \handler_name, Default_Handler
    .endm

    def_irq_handler NMI_Handler
    def_irq_handler HardFault_Handler
    def_irq_handler SVC_Handler
    def_irq_handler PendSV_Handler
    def_irq_handler SysTick_Handler


    def_irq_handler BOD_IRQHandler
    def_irq_handler WDT_IRQHandler
    def_irq_handler EINT0_IRQHandler
    def_irq_handler EINT1_IRQHandler
    def_irq_handler GPAB_IRQHandler
    def_irq_handler GPCDF_IRQHandler
    def_irq_handler PWMA_IRQHandler
    def_irq_handler TMR0_IRQHandler
    def_irq_handler TMR1_IRQHandler
    def_irq_handler TMR2_IRQHandler
    def_irq_handler TMR3_IRQHandler
    def_irq_handler UART0_IRQHandler
    def_irq_handler UART1_IRQHandler
    def_irq_handler SPI0_IRQHandler
    def_irq_handler SPI1_IRQHandler
    def_irq_handler SPI2_IRQHandler
    def_irq_handler SPI3_IRQHandler
    def_irq_handler I2C0_IRQHandler
    def_irq_handler I2C1_IRQHandler
    def_irq_handler CAN0_IRQHandler
    def_irq_handler CAN1_IRQHandler
    def_irq_handler SC012_IRQHandler
    def_irq_handler USBD_IRQHandler
    def_irq_handler PS2_IRQHandler
    def_irq_handler ACMP_IRQHandler
    def_irq_handler PDMA_IRQHandler
    def_irq_handler I2S_IRQHandler
    def_irq_handler PWRWU_IRQHandler
    def_irq_handler ADC_IRQHandler
    def_irq_handler RTC_IRQHandler


    /* ;int32_t SH_DoCommand(int32_t n32In_R0, int32_t n32In_R1, int32_t *pn32Out_R0) */
    .align 2
    .thumb_func
    .type SH_DoCommand, % function

SH_DoCommand:

    BKPT   0xAB                /* ; Wait ICE or HardFault */
    //LDR    R3, = SH_Return
    MOV    R4, lr
    BLX    R3                  /* ; Call SH_Return. The return value is in R0 */
    BX     R4                  /* ; Return value = R0 */
    .size  SH_DoCommand, . - SH_DoCommand

    .align  2
    .thumb_func
    .global __PC
    .type   __PC, % function

    .end