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/*
* 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.
*/
// 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
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