628c3bb40e
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>
39 lines
856 B
C
39 lines
856 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Author: Jianmin Lv <lvjianmin@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_LOONGARCH_ACPI_H
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#define _ASM_LOONGARCH_ACPI_H
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#ifdef CONFIG_ACPI
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extern int acpi_strict;
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extern int acpi_disabled;
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extern int acpi_pci_disabled;
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extern int acpi_noirq;
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#define acpi_os_ioremap acpi_os_ioremap
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void __init __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
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static inline void disable_acpi(void)
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{
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acpi_disabled = 1;
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acpi_pci_disabled = 1;
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acpi_noirq = 1;
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}
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static inline bool acpi_has_cpu_in_madt(void)
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{
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return true;
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}
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extern struct list_head acpi_wakeup_device_list;
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#endif /* !CONFIG_ACPI */
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#define ACPI_TABLE_UPGRADE_MAX_PHYS ARCH_LOW_ADDRESS_LIMIT
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#endif /* _ASM_LOONGARCH_ACPI_H */
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