| /* |
| * 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" |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| .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 |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| .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 |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| .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_JUMP_FDT_ADDR |
| li a0, FW_JUMP_FDT_ADDR |
| #else |
| add a0, a1, zero |
| #endif |
| ret |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| .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: |
| lla a0, _jump_addr |
| REG_L a0, (a0) |
| ret |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| .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 |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| .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 |
| |
| #ifndef FW_JUMP_ADDR |
| #error "Must define FW_JUMP_ADDR" |
| #endif |
| |
| .section .entry, "ax", %progbits |
| .align 3 |
| _jump_addr: |
| RISCV_PTR FW_JUMP_ADDR |