Linux kernel development work - see feature branches https://git.zx2c4.com/linux-dev/atom/arch/loongarch/include/asm/bootinfo.h?h=linus%2Fmaster 2022-06-03T12:09:29Z 2022-06-03T12:09:29Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:12Z urn:sha1:d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9 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> 2022-06-03T12:09:28Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:11Z urn:sha1:628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 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>