Date: Mon, 1 Mar 2010 19:58:18 +0530 From: "C. Jayachandran" <c.jayachandran@gmail.com> To: freebsd-mips@freebsd.org Subject: n32 support patches Message-ID: <98a59be81003010628g6099768erc397bc90841840f8@mail.gmail.com>
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I'm in the process of getting n32 ABI support for the RMI processors. The plan is have n32 compiled kernel with 64-bit register_t and physaddr_t and 32 bit long and pointer types. I've attached two patches, one for support for n32 in toolchain and one for n32 support in kernel compilation. With this I am able to compile the kernel and user space with n32, and the boot-up reaches until init. There is a lot more work on user-space and kernel (esp in mips/mips/*.S) before it can complete boot-up. Please review and let me know if you have any comments or objections on this approach. The patches are: http://sites.google.com/site/cjayachandran/files/n32-toolchain.patch Toolchain support for N32 - Adds the linker emulations needed for n32 - Common preprocessor defines for ABI (_ABI_MIPS_SIM and _ABI???). - Sets the long double type as 64 bit (this should be 128 bit in n32, but there is some work needed to get the 128 bit soft-float working). http://sites.google.com/site/cjayachandran/files/n32-kernel.patch N32 compilation - makefiles and conf - Adds ldscript.mips.n32. - Some cleanup in Makefile.mips, add ABI flags - bsd.cpu.mk CFLAGS for n32 compilation and linking I have introduced a TARGET_N32 similart to TARGET_64 for n32 compilation. But I think on the long term, we need clean up the different flags that affect architecture and ABI. Currently there is an overlap between the TARGET_CPUTYPE flag, the ISA_<arch> flags and the TARGET_<type> flags. Regards, JC.
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