| /* |
| * Early initialization code for aarch64 (a.k.a. armv8) |
| * |
| * Copyright 2013Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| // See LICENSE for license details. relating to the _start code in this file. |
| #include <arch/encoding.h> |
| |
| .section ".text._start", "ax", %progbits |
| // Maybe there's a better way. |
| .space 0x2000 |
| .globl _start |
| _start: |
| |
| // pending figuring out this f-ing toolchain. Hardcode what we know works. |
| la sp, 0x4ef0 // .stacktop |
| // la a0, trap_entry |
| // la gp, _gp |
| // csrw evec, a0 |
| |
| # clear any pending interrupts |
| csrwi clear_ipi, 0 |
| |
| li a0, SR_S | SR_PS | SR_EI | SR_S64 | SR_U64 |
| or a1, a0, SR_EF | SR_EA |
| csrw status, a1 |
| csrr a1, status |
| csrw status, a0 |
| |
| // and a2, a1, SR_EF |
| // sw a2, have_fp, t0 |
| |
| // and a2, a1, SR_EA |
| // sw a2, have_accelerator, t0 |
| call main |
| .=0x4000 |
| .stack: |
| .align 8 |
| .space 0xf00 |
| .stacktop: |
| .quad 0 |
| .align 3 |
| .stack_size: |
| .quad 0xf00 |
| |
| reset: |
| init_stack_loop: |
| |
| .word CONFIG_STACK_SIZE |
| .section ".id", "a", %progbits |
| |
| .section ".id", "a", @progbits |
| |
| .globl __id_start |
| // fix this bs later. What's wrong with the riscv gcc? |
| __id_start: |
| ver: |
| .asciz "1" //COREBOOT_VERSION |
| vendor: |
| .asciz "ucb" //CONFIG_MAINBOARD_VENDOR |
| part: |
| .asciz "1" //CONFIG_MAINBOARD_PART_NUMBER |
| .long __id_end + CONFIG_ID_SECTION_OFFSET - ver /* Reverse offset to the vendor id */ |
| .long __id_end + CONFIG_ID_SECTION_OFFSET - vendor /* Reverse offset to the vendor id */ |
| .long __id_end + CONFIG_ID_SECTION_OFFSET - part /* Reverse offset to the part number */ |
| .long CONFIG_ROM_SIZE /* Size of this romimage */ |
| .globl __id_end |
| |
| __id_end: |
| .previous |