Re: [PATCH 2/6] MIPS: Loongson64: Distinguish firmware dependencies DTB/LEFI.
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: 2021-02-09 15:40:01
Also in:
linux-mips, lkml
On Tue, Feb 09, 2021 at 05:32:20PM +0800, Qing Zhang wrote:
quoted hunk ↗ jump to hunk
Add DTB boot support, only support LS2K1000 processor for now, determine whether to use the built-in DTB or the DTB from the firmware by checking the range of CKSEG0 and XKPHYS. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Qing Zhang <redacted> Signed-off-by: Xingxing Su <redacted> --- .../include/asm/mach-loongson64/boot_param.h | 6 ++++++ arch/mips/include/asm/mach-loongson64/loongson.h | 3 ++- arch/mips/loongson64/env.c | 13 ++++++++++++- arch/mips/loongson64/init.c | 16 ++++++++++++++-- 4 files changed, 34 insertions(+), 4 deletions(-)diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h index 4592841b6b0c..53c29a305ff0 100644 --- a/arch/mips/include/asm/mach-loongson64/boot_param.h +++ b/arch/mips/include/asm/mach-loongson64/boot_param.h@@ -198,7 +198,13 @@ enum loongson_bridge_type { VIRTUAL = 3 }; +enum loongson_fw_interface { + LOONGSON_LEFI = 0, + LOONGSON_DTB = 1, +}; + struct loongson_system_configuration { + enum loongson_fw_interface fw_interface;
do you need this for future use ? Right now this information is only needed in init.c and doesn't need to be exported...
+ if (fw_arg2 == 0 || (be32_to_cpup((__be32 *)fw_arg2) == OF_DT_HEADER)) {what about using fdt_magic(fw_arg2) == FDT_MAGIC ? Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]