d4b6f1562a
Add Non-Uniform Memory Access (NUMA) support for LoongArch. LoongArch has 48-bit physical address, but the HyperTransport I/O bus only support 40-bit address, so we need a custom phys_to_dma() and dma_to_phys() to extract the 4-bit node id (bit 44~47) from Loongson-3's 48-bit physical address space and embed it into 40-bit. In the 40-bit dma address, node id offset can be read from the LS7A_DMA_CFG register. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
44 lines
988 B
C
44 lines
988 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_BOOTINFO_H
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#define _ASM_BOOTINFO_H
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#include <linux/types.h>
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#include <asm/setup.h>
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const char *get_system_type(void);
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extern void init_environ(void);
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extern void memblock_init(void);
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extern void platform_init(void);
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extern void plat_swiotlb_setup(void);
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extern int __init init_numa_memory(void);
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struct loongson_board_info {
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int bios_size;
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const char *bios_vendor;
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const char *bios_version;
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const char *bios_release_date;
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const char *board_name;
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const char *board_vendor;
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};
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struct loongson_system_configuration {
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int nr_cpus;
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int nr_nodes;
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int nr_io_pics;
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int boot_cpu_id;
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int cores_per_node;
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int cores_per_package;
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const char *cpuname;
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};
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extern u64 efi_system_table;
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extern unsigned long fw_arg0, fw_arg1;
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extern struct loongson_board_info b_info;
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extern struct loongson_system_configuration loongson_sysconf;
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#endif /* _ASM_BOOTINFO_H */
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