u-boot/board/qualcomm/dragonboard820c/head.S
Jorge Ramirez-Ortiz 4b684a6b82 db820c: add qualcomm dragonboard 820C support
This commit adds support for 96Boards Dragonboard820C.

The board is based on APQ8086 Qualcomm Soc, complying with the
96Boards specification.

Features
 - 4x Kyro CPU (64 bit) up to 2.15GHz
 - USB2.0
 - USB3.0
 - ISP
 - Qualcomm Hexagon DSP
 - SD 3.0 (UHS-I)
 - UFS 2.0
 - Qualcomm Adreno 530 GPU
 - GPS
 - BT 4.2
 - Wi-Fi 2.4GHz, 5GHz (802.11ac)
 - PCIe 2.0
 - MIPI-CSI, MIPI-DSI
 - I2S

U-Boot boots chained from LK (LK implements the fastboot protocol) in
64-bit mode.

For detailed build instructions see readme.txt in the board directory.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
2018-01-15 16:29:02 -05:00

34 lines
971 B
ArmAsm

/*
* ARM64 header for proper chain-loading with Little Kernel.
*
* Little Kernel shipped with Dragonboard820C boots standard Linux images for
* ARM64. This file adds header that is required to boot U-Boot properly.
*
* For details see:
* https://www.kernel.org/doc/Documentation/arm64/booting.txt
*
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
/*
* per document in linux/Doc/arm64/booting.text
*/
.global _arm64_header
_arm64_header:
b _start
.word 0
.quad CONFIG_SYS_TEXT_BASE-PHYS_SDRAM_1 /* Image load offset, LE */
.quad 0 /* Effective size of kernel image, little-endian */
.quad 0 /* kernel flags, little-endian */
.quad 0 /* reserved */
.quad 0 /* reserved */
.quad 0 /* reserved */
.byte 0x41 /* Magic number, "ARM\x64" */
.byte 0x52
.byte 0x4d
.byte 0x64
.word 0 /* reserved (used for PE COFF offset) */