mirror of
https://github.com/tillitis/tillitis-key1.git
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58 lines
820 B
ArmAsm
58 lines
820 B
ArmAsm
/*
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* Copyright (C) 2022, 2023 - Tillitis AB
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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.section ".text.init"
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.globl _start
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_start:
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li x1, 0
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li x2, 0
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li x3, 0
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li x4, 0
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li x5, 0
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li x6, 0
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li x7, 0
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li x8, 0
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li x9, 0
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li x10,0
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li x11,0
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li x12,0
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li x13,0
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li x14,0
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li x15,0
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li x16,0
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li x17,0
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li x18,0
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li x19,0
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li x20,0
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li x21,0
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li x22,0
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li x23,0
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li x24,0
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li x25,0
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li x26,0
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li x27,0
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li x28,0
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li x29,0
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li x30,0
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li x31,0
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/* Clear all RAM */
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li a0, 0x40000000 // TK1_RAM_BASE
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li a1, 0x40020000 // TK1_RAM_BASE + TK1_RAM_SIZE
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clear:
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sw zero, 0(a0)
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addi a0, a0, 4
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blt a0, a1, clear
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/*
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* Init stack at top of fw_ram. Leave 16 byte for entering our first function
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*/
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li sp, 0xd00007f0 // 2 kiB (TK1_MMIO_FW_RAM_SIZE) minus 16 byte
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call main
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loop:
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j loop
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