Commit 628c3bb4 authored by Huacai Chen's avatar Huacai Chen
Browse files

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: default avatarWANG Xuerui <git@xen0n.name>
Reviewed-by: default avatarJiaxun Yang <jiaxun.yang@flygoat.com>
Co-developed-by: default avatarYun Liu <liuyun@loongson.cn>
Signed-off-by: default avatarYun Liu <liuyun@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent b738c106

arch/loongarch/include/asm/acenv.h

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/* SPDX-License-Identifier: GPL-2.0 */

/*

 * LoongArch specific ACPICA environments and implementation

 *

 * Author: Jianmin Lv <lvjianmin@loongson.cn>

 *         Huacai Chen <chenhuacai@loongson.cn>

 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

 */



#ifndef _ASM_LOONGARCH_ACENV_H

#define _ASM_LOONGARCH_ACENV_H



/*

 * This header is required by ACPI core, but we have nothing to fill in

 * right now. Will be updated later when needed.

 */



#endif /* _ASM_LOONGARCH_ACENV_H */

arch/loongarch/include/asm/acpi.h

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/* 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 */

arch/loongarch/include/asm/bootinfo.h

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/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

 */

#ifndef _ASM_BOOTINFO_H

#define _ASM_BOOTINFO_H



#include <linux/types.h>

#include <asm/setup.h>



const char *get_system_type(void);



extern void init_environ(void);

extern void memblock_init(void);

extern void platform_init(void);



struct loongson_board_info {

	int bios_size;

	const char *bios_vendor;

	const char *bios_version;

	const char *bios_release_date;

	const char *board_name;

	const char *board_vendor;

};



struct loongson_system_configuration {

	int nr_cpus;

	int nr_nodes;

	int nr_io_pics;

	int boot_cpu_id;

	int cores_per_node;

	int cores_per_package;

	const char *cpuname;

};



extern u64 efi_system_table;

extern unsigned long fw_arg0, fw_arg1;

extern struct loongson_board_info b_info;

extern struct loongson_system_configuration loongson_sysconf;



#endif /* _ASM_BOOTINFO_H */

arch/loongarch/include/asm/dmi.h

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/* 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 */

arch/loongarch/include/asm/efi.h

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/* 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 <linux/efi.h>



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 */