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/efi.h | 41 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 arch/loongarch/include/asm/efi.h (limited to 'arch/loongarch/include/asm/efi.h') diff --git a/arch/loongarch/include/asm/efi.h b/arch/loongarch/include/asm/efi.h new file mode 100644 index 000000000000..0127d84d5e1d --- /dev/null +++ b/arch/loongarch/include/asm/efi.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ +#ifndef _ASM_LOONGARCH_EFI_H +#define _ASM_LOONGARCH_EFI_H + +#include + +void __init efi_init(void); +void __init efi_runtime_init(void); +void efifb_setup_from_dmi(struct screen_info *si, const char *opt); + +#define ARCH_EFI_IRQ_FLAGS_MASK 0x00000004 /* Bit 2: CSR.CRMD.IE */ + +#define arch_efi_call_virt_setup() \ +({ \ +}) + +#define arch_efi_call_virt(p, f, args...) \ +({ \ + efi_##f##_t * __f; \ + __f = p->f; \ + __f(args); \ +}) + +#define arch_efi_call_virt_teardown() \ +({ \ +}) + +#define EFI_ALLOC_ALIGN SZ_64K + +struct screen_info *alloc_screen_info(void); +void free_screen_info(struct screen_info *si); + +static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr) +{ + return ULONG_MAX; +} + +#endif /* _ASM_LOONGARCH_EFI_H */ -- cgit v1.2.3