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author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 13:04:11 +0300 |
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committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 15:09:28 +0300 |
commit | 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 (patch) | |
tree | 37f8cf6768e1bab484836d7c2e456475efc7262a /arch/loongarch/include/asm/dmi.h | |
parent | b738c106f7355e318ca47a3b981688efe1bc12fb (diff) | |
download | linux-628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2.tar.xz |
LoongArch: Add boot and setup routines
Add basic boot, setup and reset routines for LoongArch. Now, LoongArch
machines use UEFI-based firmware. The firmware passes configuration
information to the kernel via ACPI and DMI/SMBIOS.
Currently an existing interface between the kernel and the bootloader
is implemented. Kernel gets 2 values from the bootloader, passed in
registers a0 and a1; a0 is an "EFI boot flag" distinguishing UEFI and
non-UEFI firmware, while a1 is a pointer to an FDT with systable,
memmap, cmdline and initrd information.
The standard UEFI boot protocol (EFISTUB) will be added later.
Cc: linux-efi@vger.kernel.org
Cc: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Co-developed-by: Yun Liu <liuyun@loongson.cn>
Signed-off-by: Yun Liu <liuyun@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/dmi.h')
-rw-r--r-- | arch/loongarch/include/asm/dmi.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/dmi.h b/arch/loongarch/include/asm/dmi.h new file mode 100644 index 000000000000..605493417753 --- /dev/null +++ b/arch/loongarch/include/asm/dmi.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ +#ifndef _ASM_DMI_H +#define _ASM_DMI_H + +#include <linux/io.h> +#include <linux/memblock.h> + +#define dmi_early_remap(x, l) dmi_remap(x, l) +#define dmi_early_unmap(x, l) dmi_unmap(x) +#define dmi_alloc(l) memblock_alloc(l, PAGE_SIZE) + +static inline void *dmi_remap(u64 phys_addr, unsigned long size) +{ + return ((void *)TO_CACHE(phys_addr)); +} + +static inline void dmi_unmap(void *addr) +{ +} + +#endif /* _ASM_DMI_H */ |