Matthias Blankertz
0bc4815926
- Debugged UART - Firmware support for SPI, UART - Work on SD/MMC support in firmware - Debugged mblite core/WB interface
62 lines
838 B
ArmAsm
62 lines
838 B
ArmAsm
.text
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.org 0x0
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_vec_reset:
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bri _start
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.org 0x8
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_vec_user_ex:
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bri _start
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.org 0x10
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_vec_int:
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bri _start
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.org 0x18
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_vec_break:
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bri _start
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.org 0x20
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_vec_hw_ex:
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bri _start
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.org 0x50
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.global _start
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_start:
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# Set stack pointer
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addi r1, r0, _stack
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# Copy data to RAM
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addi r3, r0, _datald # Start of data in ROM
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addi r4, r0, _data_start # Start of data in RAM
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rsubi r5, r4, _data_end # Length of data
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_start_data_loop:
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beqi r5, _start_data_done
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addi r5, r5, -4
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lw r6, r3, r5
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sw r6, r4, r5
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bri _start_data_loop
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_start_data_done:
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# Clear BSS
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addi r3, r0, _bss_start # Start of BSS
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rsubi r4, r3, _bss_end # Length of BSS
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_start_bss_loop:
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beqi r4, _start_bss_done
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addi r4, r4, -4
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sw r0, r3, r4
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bri _start_bss_loop
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_start_bss_done:
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# Jump to firmware start
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brlid r15, main
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nop
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halt:
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bri halt
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