From 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Tue, 31 May 2022 18:04:11 +0800 Subject: 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 Reviewed-by: WANG Xuerui Reviewed-by: Jiaxun Yang Co-developed-by: Yun Liu Signed-off-by: Yun Liu Signed-off-by: Huacai Chen --- arch/loongarch/include/asm/dmi.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 arch/loongarch/include/asm/dmi.h (limited to 'arch/loongarch/include/asm/dmi.h') 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 +#include + +#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 */ -- cgit v1.2.3