u-boot/common/spl/spl_opensbi.c
Michal Simek caa7fc2c57 spl: Use standard FIT entries
SPL is creating fit-images DT node when loadables are recorded in selected
configuration. Entries which are created are using entry-point and
load-addr property names. But there shouldn't be a need to use non standard
properties because entry/load are standard FIT properties. But using
standard FIT properties enables option to use generic FIT functions to
descrease SPL size. Here is result for ZynqMP virt configuration:
xilinx_zynqmp_virt: spl/u-boot-spl:all -82 spl/u-boot-spl:rodata -22 spl/u-boot-spl:text -60

The patch causes change in run time fit image record.
Before:
fit-images {
        uboot {
                os = "u-boot";
                type = "firmware";
                size = <0xfd520>;
                entry-point = <0x8000000>;
                load-addr = <0x8000000>;
        };
};

After:
fit-images {
        uboot {
                os = "u-boot";
                type = "firmware";
                size = <0xfd520>;
                entry = <0x8000000>;
                load = <0x8000000>;
        };
};

Replacing calling fdt_getprop_u32() by fit_image_get_entry/load() also
enables support for reading entry/load properties recorded in 64bit format.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-27 08:13:32 +01:00

98 lines
2.6 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 <cpu_func.h>
#include <errno.h>
#include <hang.h>
#include <image.h>
#include <spl.h>
#include <asm/smp.h>
#include <opensbi.h>
#include <linux/libfdt.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\n", ret);
hang();
}
/* Get U-Boot entry point */
ret = fit_image_get_entry(spl_image->fdt_addr, uboot_node, &uboot_entry);
if (ret)
ret = fit_image_get_load(spl_image->fdt_addr, uboot_node, &uboot_entry);
/* 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_info.boot_hart = gd->arch.boot_hart;
opensbi_entry = (void (*)(ulong, ulong, ulong))spl_image->entry_point;
invalidate_icache_all();
#ifdef CONFIG_SPL_SMP
/*
* Start OpenSBI on all secondary harts and wait for acknowledgment.
*
* OpenSBI first relocates itself to its link address. This is done by
* the main hart. To make sure no hart is still running U-Boot SPL
* during relocation, we wait for all secondary harts to acknowledge
* the call-function request before entering OpenSBI on the main hart.
* Otherwise, code corruption can occur if the link address ranges of
* U-Boot SPL and OpenSBI overlap.
*/
ret = smp_call_function((ulong)spl_image->entry_point,
(ulong)spl_image->fdt_addr,
(ulong)&opensbi_info, 1);
if (ret)
hang();
#endif
opensbi_entry(gd->arch.boot_hart, (ulong)spl_image->fdt_addr,
(ulong)&opensbi_info);
}