57 lines
821 B
ArmAsm
57 lines
821 B
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Minimal LoongArch system boot code.
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*
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* Copyright (c) 2021 Loongson Technology Corporation Limited
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*/
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#include "regdef.h"
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.global _start
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.align 16
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_start:
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la.local t0, stack_end
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move sp, t0
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bl main
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.type _start 2
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.size _start, .-_start
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.global _exit
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.align 16
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_exit:
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2: /* QEMU ACPI poweroff */
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li.w t0, 0xff
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li.w t1, 0x10080010
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st.w t0, t1, 0
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idle 0
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bl 2b
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.type _exit 2
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.size _exit, .-_exit
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.global __sys_outc
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__sys_outc:
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li.d t1, 1000000
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loop:
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lu12i.w t2, 0x1fe00
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ori t0, t2, 0x1e5
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ld.bu t0, t0, 0
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andi t0, t0, 0x20
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ext.w.b t0, t0
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bnez t0, in
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addi.w t1, t1, -1
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bnez t1, loop
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in:
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ext.w.b a0, a0
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lu12i.w t0, 0x1fe00
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ori t0, t0, 0x1e0
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st.b a0, t0, 0
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jirl $r0, ra, 0
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.data
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.align 4
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stack:
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.space 65536
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stack_end:
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