mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
5e30e45c83
RISC-V OpenSBI is an open-source implementation of the RISC-V Supervisor
Binary Interface (SBI) specification. It is required by Linux and U-Boot
running in supervisor mode. This patch adds support for booting via the
OpenSBI FW_DYNAMIC firmware. It supports OpenSBI version 0.4 and higher.
In this configuration, U-Boot SPL starts in machine mode. After loading
OpenSBI and U-Boot proper, it will start OpenSBI. All necessary
parameters are generated by U-Boot SPL and are passed to OpenSBI. U-Boot
proper is started in supervisor mode by OpenSBI. Support for OpenSBI is
enabled with CONFIG_SPL_OPENSBI. An additional configuration entry,
CONFIG_SPL_OPENSBI_LOAD_ADDR, is used to specify the load address of the
OpenSBI firmware binary. It is not used directly in U-Boot and instead
is intended to make the value available to scripts such as FIT
configuration generators.
The header file include/opensbi.h is based on header files from the
OpenSBI project. They are recent, as of commit bae54f764570 ("firmware:
Add fw_dynamic firmware").
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2019 Fraunhofer AISEC,
|
|
* Lukas Auer <lukas.auer@aisec.fraunhofer.de>
|
|
*
|
|
* Based on common/spl/spl_atf.c
|
|
*/
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <spl.h>
|
|
#include <asm/smp.h>
|
|
#include <opensbi.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
struct fw_dynamic_info opensbi_info;
|
|
|
|
static int spl_opensbi_find_uboot_node(void *blob, int *uboot_node)
|
|
{
|
|
int fit_images_node, node;
|
|
const char *fit_os;
|
|
|
|
fit_images_node = fdt_path_offset(blob, "/fit-images");
|
|
if (fit_images_node < 0)
|
|
return -ENODEV;
|
|
|
|
fdt_for_each_subnode(node, blob, fit_images_node) {
|
|
fit_os = fdt_getprop(blob, node, FIT_OS_PROP, NULL);
|
|
if (!fit_os)
|
|
continue;
|
|
|
|
if (genimg_get_os_id(fit_os) == IH_OS_U_BOOT) {
|
|
*uboot_node = node;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
void spl_invoke_opensbi(struct spl_image_info *spl_image)
|
|
{
|
|
int ret, uboot_node;
|
|
ulong uboot_entry;
|
|
void (*opensbi_entry)(ulong hartid, ulong dtb, ulong info);
|
|
|
|
if (!spl_image->fdt_addr) {
|
|
pr_err("No device tree specified in SPL image\n");
|
|
hang();
|
|
}
|
|
|
|
/* Find U-Boot image in /fit-images */
|
|
ret = spl_opensbi_find_uboot_node(spl_image->fdt_addr, &uboot_node);
|
|
if (ret) {
|
|
pr_err("Can't find U-Boot node, %d", ret);
|
|
hang();
|
|
}
|
|
|
|
/* Get U-Boot entry point */
|
|
uboot_entry = fdt_getprop_u32(spl_image->fdt_addr, uboot_node,
|
|
"entry-point");
|
|
if (uboot_entry == FDT_ERROR)
|
|
uboot_entry = fdt_getprop_u32(spl_image->fdt_addr, uboot_node,
|
|
"load-addr");
|
|
|
|
/* Prepare obensbi_info object */
|
|
opensbi_info.magic = FW_DYNAMIC_INFO_MAGIC_VALUE;
|
|
opensbi_info.version = FW_DYNAMIC_INFO_VERSION;
|
|
opensbi_info.next_addr = uboot_entry;
|
|
opensbi_info.next_mode = FW_DYNAMIC_INFO_NEXT_MODE_S;
|
|
opensbi_info.options = SBI_SCRATCH_NO_BOOT_PRINTS;
|
|
|
|
opensbi_entry = (void (*)(ulong, ulong, ulong))spl_image->entry_point;
|
|
invalidate_icache_all();
|
|
|
|
#ifdef CONFIG_SMP
|
|
ret = smp_call_function((ulong)spl_image->entry_point,
|
|
(ulong)spl_image->fdt_addr,
|
|
(ulong)&opensbi_info);
|
|
if (ret)
|
|
hang();
|
|
#endif
|
|
opensbi_entry(gd->arch.boot_hart, (ulong)spl_image->fdt_addr,
|
|
(ulong)&opensbi_info);
|
|
}
|