103 lines
2.3 KiB
ArmAsm
103 lines
2.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 ArtInChip Technology Co.,Ltd
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* Author: Dehuang Wu <dehuang.wu@artinchip.com>
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*/
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#include <config.h>
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#include <linux/linkage.h>
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#ifdef CONFIG_32BIT
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#define LREG lw
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#define SREG sw
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#define REGBYTES 4
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#define RELOC_TYPE R_RISCV_32
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#define SYM_INDEX 0x8
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#define SYM_SIZE 0x10
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#else
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#define LREG ld
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#define SREG sd
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#define REGBYTES 8
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#define RELOC_TYPE R_RISCV_64
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#define SYM_INDEX 0x20
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#define SYM_SIZE 0x18
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#endif
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.extern boot_params_stash
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ENTRY(save_boot_params)
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la t0, boot_params_stash
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SREG a0, REGBYTES * 0(t0)
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SREG a1, REGBYTES * 1(t0)
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SREG a2, REGBYTES * 2(t0)
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SREG a3, REGBYTES * 3(t0)
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SREG a4, REGBYTES * 4(t0)
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SREG a5, REGBYTES * 5(t0)
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SREG a6, REGBYTES * 6(t0)
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SREG a7, REGBYTES * 7(t0)
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SREG s0, REGBYTES * 8(t0)
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SREG s1, REGBYTES * 9(t0)
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SREG s2, REGBYTES * 10(t0)
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SREG s3, REGBYTES * 11(t0)
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SREG s4, REGBYTES * 12(t0)
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SREG s5, REGBYTES * 13(t0)
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SREG s6, REGBYTES * 14(t0)
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SREG s7, REGBYTES * 15(t0)
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SREG s8, REGBYTES * 16(t0)
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SREG s9, REGBYTES * 17(t0)
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SREG s10, REGBYTES * 18(t0)
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SREG s11, REGBYTES * 19(t0)
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SREG sp, REGBYTES * 20(t0)
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SREG ra, REGBYTES * 21(t0)
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j save_boot_params_ret
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ENDPROC(save_boot_params)
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#ifdef CONFIG_SPL_BUILD
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/*
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* Two cases return to boot rom:
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* - USB upgrade case, boot rom run SPL to initialize DRAM, then return to boot
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* rom.
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* - When boot loader want to enter USB upgrade mode
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*/
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ENTRY(board_return_to_bootrom)
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la t0, boot_params_stash
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LREG a0, REGBYTES * 0(t0)
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LREG a1, REGBYTES * 1(t0)
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LREG a2, REGBYTES * 2(t0)
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LREG a3, REGBYTES * 3(t0)
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LREG a4, REGBYTES * 4(t0)
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LREG a5, REGBYTES * 5(t0)
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LREG a6, REGBYTES * 6(t0)
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LREG a7, REGBYTES * 7(t0)
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LREG s0, REGBYTES * 8(t0)
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LREG s1, REGBYTES * 9(t0)
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LREG s2, REGBYTES * 10(t0)
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LREG s3, REGBYTES * 11(t0)
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LREG s4, REGBYTES * 12(t0)
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LREG s5, REGBYTES * 13(t0)
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LREG s6, REGBYTES * 14(t0)
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LREG s7, REGBYTES * 15(t0)
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LREG s8, REGBYTES * 16(t0)
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LREG s9, REGBYTES * 17(t0)
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LREG s10, REGBYTES * 18(t0)
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LREG s11, REGBYTES * 19(t0)
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LREG sp, REGBYTES * 20(t0)
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LREG ra, REGBYTES * 21(t0)
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ret
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ENDPROC(board_return_to_bootrom)
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#else
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/*
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* U-Boot is not support return to bootrom.
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*/
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ENTRY(board_return_to_bootrom)
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ENDPROC(board_return_to_bootrom)
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#endif
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ENTRY(lowlevel_init)
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/* nothing done */
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ENDPROC(lowlevel_init)
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