diff options
Diffstat (limited to 'src/target/firmware/board/common/compal_ramload_start.S')
| -rw-r--r-- | src/target/firmware/board/common/compal_ramload_start.S | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/src/target/firmware/board/common/compal_ramload_start.S b/src/target/firmware/board/common/compal_ramload_start.S deleted file mode 100644 index 3036fec9..00000000 --- a/src/target/firmware/board/common/compal_ramload_start.S +++ /dev/null @@ -1,164 +0,0 @@ - - .EQU ARM_MODE_FIQ, 0x11 - .EQU ARM_MODE_IRQ, 0x12 - .EQU ARM_MODE_SVC, 0x13 - - .EQU I_BIT, 0x80 - .EQU F_BIT, 0x40 - -#define TOP_OF_RAM 0x083fff0 -#define FIQ_STACK_SIZE 1024 -#define IRQ_STACK_SIZE 1024 - -.section .text.start - -.globl _start -_start: - /* clear bss section */ - .global __bss_start - .global __bss_end - mov r0, #0 - ldr r1, =__bss_start - ldr r2, =__bss_end -2: cmp r1, r2 - strlo r0, [r1], #4 - blo 2b - - /* initialize stacks, starting at TOP_OF_RAM */ - ldr r0, =TOP_OF_RAM - - /* initialize FIQ stack */ - msr CPSR_c, #ARM_MODE_FIQ | I_BIT | F_BIT - mov r13, r0 - sub r0, r0, #FIQ_STACK_SIZE - - /* initialize IRQ stack */ - msr CPSR_c, #ARM_MODE_IRQ | I_BIT | F_BIT - mov r13, r0 - sub r0, r0, #IRQ_STACK_SIZE - - /* initialize supervisor stack */ - msr CPSR_c, #ARM_MODE_SVC | I_BIT | F_BIT - mov r13, r0 - - /* set backlight to moderate level */ - bl pwl_init - mov r0, #50 - bl pwl_set_level - - /* test uart output */ - @ldr r0, =string - @bl puts_asm - - /* dump some memory */ - @ldr r0, =0xfffef000 - @bl memdump - @ldr r0, =0xfffffe00 - @bl memdump - - /* call constructor functions */ - ldr r0, _ctor_list - ldr r1, _ctor_end - bl do_global_ctors - - /* jump to main */ - ldr pc, _jump_main - - /* endless loop at end of program */ -_end: b _end - b _start - -_jump_main: .word main -_ctor_list: .word __CTOR_LIST__ -_ctor_end: .word __CTOR_END__ - -/* handler for all kinds of aborts */ -handle_abort: - @ print the PC we would jump back to... - sub lr, lr, #4 @ we assume to be ARM32 - - mov r0, lr - mov r1, #8 - bl phex - - @ print abort message - mov r0, #'A' - bl putchar_asm - mov r0, #'B' - bl putchar_asm - mov r0, #'O' - bl putchar_asm - mov r0, #'R' - bl putchar_asm - mov r0, #'T' - bl putchar_asm - - @ disable IRQ and FIQ - msr CPSR_c, #I_BIT | F_BIT - -0: @ dead - b 0b - -/* entry point for IRQs */ -irq_entry: - /* Adjust and save LR_irq in IRQ stack */ - sub lr, lr, #4 - stmfd sp!, {lr} - - /* Save SPSR for nested interrupt */ - mrs r14, SPSR - stmfd sp!, {r14} - - /* Call the interrupt handler C function */ - stmfd sp!, {r0-r4, r12} - bl irq - ldmfd sp!, {r0-r4, r12} - - /* Restore SPSR_irq from IRQ stack */ - ldmia sp!, {r14} - msr SPSR_cxsf, r14 - - /* Restore adjusted LR_irq from IRQ stack directly in the PC */ - ldmia sp!, {pc}^ - -/* entry point for FIQs */ -fiq_entry: - /* Adjust and save LR_irq in IRQ stack */ - sub lr, lr, #4 - stmfd sp!, {lr} - - /* Save SPSR for nested interrupt */ - mrs r14, SPSR - stmfd sp!, {r14} - - /* Call the interrupt handler C function */ - stmfd sp!, {r0-r4, r12} - bl fiq - ldmfd sp!, {r0-r4, r12} - - /* Restore SPSR_irq from IRQ stack */ - ldmia sp!, {r14} - msr SPSR_cxsf, r14 - - /* Restore adjusted LR_irq from IRQ stack directly in the PC */ - ldmia sp!, {pc}^ - -/* Exception Vectors like they are needed for the exception vector - indirection of the internal boot ROM. The following section must be liked - to appear at 0x80'001c */ -.section .text.exceptions -_undef_instr: - b handle_abort -_sw_interr: - b _sw_interr -_prefetch_abort: - b handle_abort -_data_abort: - b handle_abort -_reserved: - b _reserved -_irq: - b irq_entry -_fiq: - b fiq_entry - |