Date: Wed, 11 Jul 2012 10:46:22 +0800 From: Paul Ambrose <ambrosehua@gmail.com> To: freebsd-mips@FreeBSD.org Subject: Porting FreeBSD to Loongson 3A (RS780e) Message-ID: <CAMwoQQ7NcM0S7LmHgOH2hhL9xPu-fTsZZxCRvJ9LLHZD-AjFhw@mail.gmail.com>
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I received my Loongson 3A box(http://www.lemote.com/products/computer/fulong/348.html) 9 days ago. It has Loongson 3A processor, 4 cores at 900Mhz( 64KB L1D + 64KB L1I per-core and 4MB L2 cache shared=A3=A9 , MIPS64r2 with GS64 SIMD extension and pre-installed with a RHEL6-derived distribution. The hardware configuration is here: CPU: 4 GS64 cores, 900Mhz, mips64r2-compatible; MEM: 2x 2GB DDR3 800Mhz; chipset=A3=BA AMD RS780e + SB710=A3=BB Hardrive=A3=BA320GB sata2 x1 =A3=A8 2 SATA SLOT=A3=A9=A3=BB Etherent=A3=BA relteak 8168=A3=BB Display=A3=BA built-in Radeaon 3200 with 128MB mem supporting DVI + VGA=A3= =BB Bios: PMON I did some test and some research, it seems stable, so I want to port FreeBSD to this box. Now I have a few question. No.1: Does freebsd mips toolchain support mips64r2 with little-endian? the source code indicate that there is only one mips64 little-endian board, MALTA64, other mips64 board are big-endian, Loongson 3A only support little-endian and 64bit-address. No.2: I cross-build malta64 on my x86-box, I have no idea whether malta64 use ldscript.mips or ldscript.mips.mips64, and where is the kernel image loaded? [ambrosehua@lateaxfreebsd MALTA64] readelf -h kernel ELF Header: Magic: 7f 45 4c 46 02 01 01 09 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, little endian Version: 1 (current) OS/ABI: UNIX - FreeBSD ABI Version: 0 Type: EXEC (Executable file) Machine: MIPS R3000 Version: 0x1 Entry point address: 0x80001160 Start of program headers: 64 (bytes into file) Start of section headers: 5103792 (bytes into file) Flags: 0x60000001, noreorder, mips64 Size of this header: 64 (bytes) Size of program headers: 56 (bytes) Number of program headers: 5 Size of section headers: 64 (bytes) Number of section headers: 27 Section header string table index: 24 and Where does this 0x80001160 come from? If this 0x80001160 is from KERNLOADADDR(0X80001000)+SIZEOF_HEADERS, where is SIZEOF_HEADERS?
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