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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 18:04:11 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 20:09:28 +0800 |
| commit | 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 (patch) | |
| tree | 37f8cf6768e1bab484836d7c2e456475efc7262a /arch/loongarch/include/asm/acpi.h | |
| parent | b738c106f7355e318ca47a3b981688efe1bc12fb (diff) | |
| download | linux-628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2.tar.bz2 | |
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/acpi.h')
| -rw-r--r-- | arch/loongarch/include/asm/acpi.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/acpi.h b/arch/loongarch/include/asm/acpi.h new file mode 100644 index 000000000000..62044cd5b7bc --- /dev/null +++ b/arch/loongarch/include/asm/acpi.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Author: Jianmin Lv <lvjianmin@loongson.cn> + * Huacai Chen <chenhuacai@loongson.cn> + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ + +#ifndef _ASM_LOONGARCH_ACPI_H +#define _ASM_LOONGARCH_ACPI_H + +#ifdef CONFIG_ACPI +extern int acpi_strict; +extern int acpi_disabled; +extern int acpi_pci_disabled; +extern int acpi_noirq; + +#define acpi_os_ioremap acpi_os_ioremap +void __init __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size); + +static inline void disable_acpi(void) +{ + acpi_disabled = 1; + acpi_pci_disabled = 1; + acpi_noirq = 1; +} + +static inline bool acpi_has_cpu_in_madt(void) +{ + return true; +} + +extern struct list_head acpi_wakeup_device_list; + +#endif /* !CONFIG_ACPI */ + +#define ACPI_TABLE_UPGRADE_MAX_PHYS ARCH_LOW_ADDRESS_LIMIT + +#endif /* _ASM_LOONGARCH_ACPI_H */ |