diff options
Diffstat (limited to 'arch/nios2/kernel/prom.c')
| -rw-r--r-- | arch/nios2/kernel/prom.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/nios2/kernel/prom.c b/arch/nios2/kernel/prom.c new file mode 100644 index 0000000000..8d98af5c72 --- /dev/null +++ b/arch/nios2/kernel/prom.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Device tree support + * + * Copyright (C) 2013, 2015 Altera Corporation + * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> + * + * Based on MIPS support for CONFIG_OF device tree support + * + * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> + */ + +#include <linux/init.h> +#include <linux/types.h> +#include <linux/memblock.h> +#include <linux/of.h> +#include <linux/of_fdt.h> +#include <linux/io.h> + +#include <asm/sections.h> + +void __init early_init_devtree(void *params) +{ + __be32 *dtb = (u32 *)__dtb_start; +#if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR) + if (be32_to_cpup((__be32 *)CONFIG_NIOS2_DTB_PHYS_ADDR) == + OF_DT_HEADER) { + params = (void *)CONFIG_NIOS2_DTB_PHYS_ADDR; + early_init_dt_scan(params); + return; + } +#endif + if (be32_to_cpu((__be32) *dtb) == OF_DT_HEADER) + params = (void *)__dtb_start; + + early_init_dt_scan(params); +} |