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57 lines
1.9 KiB
ArmAsm
57 lines
1.9 KiB
ArmAsm
// assembler directives
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.set noat // allow manual use of $at
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.set noreorder // don't insert nops after branches
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#include "macros.inc"
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.section .text, "ax"
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glabel entry_point
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#ifdef VERSION_CN
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// Get main segment bss address and size
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lui $t0, %lo(_mainSegmentNoloadStartHi)
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ori $t0, %lo(_mainSegmentNoloadStartLo)
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lui $t1, %lo(_mainSegmentNoloadSizeHi)
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ori $t1, %lo(_mainSegmentNoloadSizeLo)
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.clear_bytes:
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// Clear bss section until they are zeroed out
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sw $zero, ($t0) // Clear 4 bytes
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sw $zero, 4($t0) // Clear the next 4 bytes
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addi $t0, $t0, 8 // Increment the address of bytes to clear
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addi $t1, $t1, -8 // Subtract 8 bytes from the amount remaining
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bnez $t1, .clear_bytes // Continue clearing until clear_bytes is 0
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nop
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// Get init function and idle thread stack
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lui $sp, %lo(gIdleThreadStackHi)
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ori $sp, %lo(gIdleThreadStackLo)
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lui $t2, %lo(main_funcHi)
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ori $t2, %lo(main_funcLo)
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jr $t2 // Jump to the init function
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nop
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#else
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// Get main segment bss address and size
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lui $t0, %hi(_mainSegmentNoloadStart)
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lui $t1, %lo(_mainSegmentNoloadSizeHi)
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addiu $t0, %lo(_mainSegmentNoloadStart)
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ori $t1, %lo(_mainSegmentNoloadSizeLo)
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.clear_bytes:
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// Clear bss section until they are zeroed out
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addi $t1, $t1, -8 // Subtract 8 bytes from the amount remaining
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sw $zero, ($t0) // Clear 4 bytes
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sw $zero, 4($t0) // Clear the next 4 bytes
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bnez $t1, .clear_bytes // Continue clearing until clear_bytes is 0
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addi $t0, $t0, 8 // Increment the address of bytes to clear
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// Get init function and idle thread stack
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lui $t2, %hi(main_func)
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lui $sp, %hi(gIdleThreadStack)
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addiu $t2, %lo(main_func)
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jr $t2 // Jump to the init function
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addiu $sp, %lo(gIdleThreadStack)
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#endif
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nop
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nop
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nop
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nop
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nop
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nop
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