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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include "fw_base.S"
.align 3
.section .entry, "ax", %progbits
.global fw_boot_hart
/*
* This function is called very early even before
* fw_save_info() is called.
* We can only use a0, a1, and a2 registers here.
* The boot HART id should be returned in 'a0'.
*/
fw_boot_hart:
li a0, -1
ret
.align 3
.section .entry, "ax", %progbits
.global fw_save_info
/*
* We can only use a0, a1, a2, a3, and a4 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* Nothing to be returned here.
*/
fw_save_info:
ret
.align 3
.section .entry, "ax", %progbits
.global fw_prev_arg1
/*
* We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The previous arg1 should be returned in 'a0'.
*/
fw_prev_arg1:
#ifdef FW_PAYLOAD_FDT_PATH
la a0, fdt_bin
#else
add a0, zero, zero
#endif
ret
.align 3
.section .entry, "ax", %progbits
.global fw_next_arg1
/*
* We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The next arg1 should be returned in 'a0'.
*/
fw_next_arg1:
#ifdef FW_PAYLOAD_FDT_ADDR
li a0, FW_PAYLOAD_FDT_ADDR
#else
add a0, a1, zero
#endif
ret
.align 3
.section .entry, "ax", %progbits
.global fw_next_addr
/*
* We can only use a0, a1, and a2 registers here.
* The next address should be returned in 'a0'.
*/
fw_next_addr:
la a0, payload_bin
ret
.align 3
.section .entry, "ax", %progbits
.global fw_next_mode
/*
* We can only use a0, a1, and a2 registers here.
* The next address should be returned in 'a0'.
*/
fw_next_mode:
li a0, PRV_S
ret
.align 3
.section .entry, "ax", %progbits
.global fw_options
/*
* We can only use a0, a1, and a2 registers here.
* The 'a4' register will have default options.
* The next address should be returned in 'a0'.
*/
fw_options:
add a0, zero, zero
ret
/*
* We disable relaxation because use of ".align"
* and ".balign" can potentially generate compile
* errors with latest RISC-V GCC Binutils.
*/
.option push
.option norelax
#ifdef FW_PAYLOAD_FDT_PATH
.align 4
.section .text, "ax", %progbits
.globl fdt_bin
fdt_bin:
.incbin FW_PAYLOAD_FDT_PATH
#endif
.align 4
.section .payload, "ax", %progbits
.globl payload_bin
payload_bin:
#ifndef FW_PAYLOAD_PATH
wfi
j payload_bin
#else
.incbin FW_PAYLOAD_PATH
#endif
.option pop
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