u-boot/board/emulation/qemu-riscv/qemu-riscv.c
Anup Patel ef19131b80 riscv: qemu: Implement is_flash_available() for MTD NOR
Currently, if MTD NOR is enabled then U-Boot tries to issue flash
commands even when CFI flash DT node is not present. This causes
access fault on RISC-V emulators or ISS which do not emulate CFI
flash. To handle this issue, we implement is_flash_available() for
qemu-riscv board which will return 1 only if CFI flash DT node is
present.

Fixes: d248627f9d ("riscv: qemu: Enable MTD NOR flash support")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
2022-02-10 11:18:13 +08:00

92 lines
1.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <dm/ofnode.h>
#include <env.h>
#include <fdtdec.h>
#include <image.h>
#include <log.h>
#include <spl.h>
#include <init.h>
#include <virtio_types.h>
#include <virtio.h>
DECLARE_GLOBAL_DATA_PTR;
#if IS_ENABLED(CONFIG_MTD_NOR_FLASH)
int is_flash_available(void)
{
if (!ofnode_equal(ofnode_by_compatible(ofnode_null(), "cfi-flash"),
ofnode_null()))
return 1;
return 0;
}
#endif
int board_init(void)
{
/*
* Make sure virtio bus is enumerated so that peripherals
* on the virtio bus can be discovered by their drivers
*/
virtio_init();
return 0;
}
int board_late_init(void)
{
ulong kernel_start;
ofnode chosen_node;
int ret;
chosen_node = ofnode_path("/chosen");
if (!ofnode_valid(chosen_node)) {
debug("No chosen node found, can't get kernel start address\n");
return 0;
}
#ifdef CONFIG_ARCH_RV64I
ret = ofnode_read_u64(chosen_node, "riscv,kernel-start",
(u64 *)&kernel_start);
#else
ret = ofnode_read_u32(chosen_node, "riscv,kernel-start",
(u32 *)&kernel_start);
#endif
if (ret) {
debug("Can't find kernel start address in device tree\n");
return 0;
}
env_set_hex("kernel_start", kernel_start);
return 0;
}
#ifdef CONFIG_SPL
u32 spl_boot_device(void)
{
/* RISC-V QEMU only supports RAM as SPL boot device */
return BOOT_DEVICE_RAM;
}
#endif
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
/* boot using first FIT config */
return 0;
}
#endif
void *board_fdt_blob_setup(int *err)
{
*err = 0;
/* Stored the DTB address there during our init */
return (void *)(ulong)gd->arch.firmware_fdt_addr;
}