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Line 85... |
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// *********************************************************
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// *********************************************************
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// Setup global pointer
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// Setup global pointer
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// *********************************************************
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// *********************************************************
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#ifndef __BOOTLOADER_START_CODE__
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__crt0_global_pointer_init:
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__crt0_global_pointer_init:
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.option push
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.option push
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.option norelax
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.option norelax
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la gp, __global_pointer$
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la gp, __global_pointer$
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.option pop
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.option pop
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#endif
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// *********************************************************
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// *********************************************************
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// Init trap handler base address
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// Init trap handler base address
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// *********************************************************
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// *********************************************************
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Line 105... |
// *********************************************************
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// *********************************************************
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// Reset/deactivate IO/peripheral devices
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// Reset/deactivate IO/peripheral devices
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// Devices, that are not implemented, will cause a store access fault
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// Devices, that are not implemented, will cause a store access fault
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// which is captured but actually ignored due to the dummy handler.
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// which is captured but actually ignored due to the dummy handler.
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// *********************************************************
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// *********************************************************
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#ifndef __BOOTLOADER_START_CODE__
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__crt0_reset_io:
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__crt0_reset_io:
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li x11, IO_BEGIN // start of processor-internal IO region
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li x11, IO_BEGIN // start of processor-internal IO region
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__crt0_reset_io_loop:
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__crt0_reset_io_loop:
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sw zero, 0(x11)
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sw zero, 0(x11)
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addi x11, x11, 4
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addi x11, x11, 4
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bne zero, x11, __crt0_reset_io_loop
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bne zero, x11, __crt0_reset_io_loop
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#endif
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// *********************************************************
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// *********************************************************
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// Clear .bss section (byte-wise)
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// Clear .bss section (byte-wise)
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// *********************************************************
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// *********************************************************
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#ifndef __BOOTLOADER_START_CODE__
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__crt0_clear_bss:
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__crt0_clear_bss:
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la x11, __crt0_bss_start
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la x11, __crt0_bss_start
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la x12, __crt0_bss_end
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la x12, __crt0_bss_end
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__crt0_clear_bss_loop:
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__crt0_clear_bss_loop:
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Line 128... |
sb zero, 0(x11)
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sb zero, 0(x11)
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addi x11, x11, 1
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addi x11, x11, 1
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j __crt0_clear_bss_loop
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j __crt0_clear_bss_loop
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__crt0_clear_bss_loop_end:
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__crt0_clear_bss_loop_end:
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#endif
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// *********************************************************
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// *********************************************************
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// Copy initialized .data section from ROM to RAM (byte-wise)
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// Copy initialized .data section from ROM to RAM (byte-wise)
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// *********************************************************
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// *********************************************************
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#ifndef __BOOTLOADER_START_CODE__
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__crt0_copy_data:
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__crt0_copy_data:
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la x11, __crt0_copy_data_src_begin // start of data area (copy source)
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la x11, __crt0_copy_data_src_begin // start of data area (copy source)
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la x12, __crt0_copy_data_dst_begin // start of data area (copy destination)
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la x12, __crt0_copy_data_dst_begin // start of data area (copy destination)
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la x13, __crt0_copy_data_dst_end // last address of destination data area
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la x13, __crt0_copy_data_dst_end // last address of destination data area
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Line 147... |
addi x11, x11, 1
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addi x11, x11, 1
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addi x12, x12, 1
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addi x12, x12, 1
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j __crt0_copy_data_loop
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j __crt0_copy_data_loop
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__crt0_copy_data_loop_end:
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__crt0_copy_data_loop_end:
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#endif
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// *********************************************************
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// *********************************************************
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// Call main function (with argc = argv = 0)
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// Call main function (with argc = argv = 0)
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// *********************************************************
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// *********************************************************
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