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02b08045a0
Microblaze little-endian toolchain exports __MICROBLAZEEL__ which is used in the kernel to identify little/big endian. The most of the changes are in loading values from DTB which is always big endian. Little endian platforms are based on new AXI bus which has impact to early uartlite initialization. Signed-off-by: Michal Simek <monstr@monstr.eu>
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/*
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_ELF_H
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#define _ASM_MICROBLAZE_ELF_H
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/*
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* Note there is no "official" ELF designation for Microblaze.
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* I've snaffled the value from the microblaze binutils source code
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* /binutils/microblaze/include/elf/microblaze.h
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*/
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#define EM_XILINX_MICROBLAZE 0xbaab
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#define ELF_ARCH EM_XILINX_MICROBLAZE
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) ((x)->e_machine == EM_XILINX_MICROBLAZE)
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/*
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* These are used to set parameters in the core dumps.
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*/
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#define ELF_CLASS ELFCLASS32
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#ifndef __uClinux__
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/*
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* ELF register definitions..
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*/
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#include <asm/ptrace.h>
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#include <asm/byteorder.h>
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#ifndef ELF_GREG_T
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#define ELF_GREG_T
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typedef unsigned long elf_greg_t;
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#endif
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#ifndef ELF_NGREG
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#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
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#endif
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#ifndef ELF_GREGSET_T
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#define ELF_GREGSET_T
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typedef elf_greg_t elf_gregset_t[ELF_NGREG];
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#endif
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#ifndef ELF_FPREGSET_T
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#define ELF_FPREGSET_T
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/* TBD */
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#define ELF_NFPREG 33 /* includes fsr */
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typedef unsigned long elf_fpreg_t;
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typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
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/* typedef struct user_fpu_struct elf_fpregset_t; */
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#endif
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/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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* use of this is to invoke "./ld.so someprog" to test out a new version of
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* the loader. We need to make sure that it is out of the way of the program
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* that it will "exec", and that there is sufficient room for the brk.
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*/
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#define ELF_ET_DYN_BASE (0x08000000)
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#ifdef __MICROBLAZEEL__
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#define ELF_DATA ELFDATA2LSB
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#else
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#define ELF_DATA ELFDATA2MSB
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#endif
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#define ELF_EXEC_PAGESIZE PAGE_SIZE
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#define ELF_CORE_COPY_REGS(_dest, _regs) \
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memcpy((char *) &_dest, (char *) _regs, \
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sizeof(struct pt_regs));
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/* This yields a mask that user programs can use to figure out what
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* instruction set this CPU supports. This could be done in user space,
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* but it's not easy, and we've already done it here.
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*/
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#define ELF_HWCAP (0)
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/* This yields a string that ld.so will use to load implementation
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* specific libraries for optimization. This is more specific in
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* intent than poking at uname or /proc/cpuinfo.
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* For the moment, we have only optimizations for the Intel generations,
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* but that could change...
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*/
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#define ELF_PLATFORM (NULL)
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/* Added _f parameter. Is this definition correct: TBD */
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#define ELF_PLAT_INIT(_r, _f) \
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do { \
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_r->r1 = _r->r1 = _r->r2 = _r->r3 = \
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_r->r4 = _r->r5 = _r->r6 = _r->r7 = \
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_r->r8 = _r->r9 = _r->r10 = _r->r11 = \
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_r->r12 = _r->r13 = _r->r14 = _r->r15 = \
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_r->r16 = _r->r17 = _r->r18 = _r->r19 = \
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_r->r20 = _r->r21 = _r->r22 = _r->r23 = \
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_r->r24 = _r->r25 = _r->r26 = _r->r27 = \
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_r->r28 = _r->r29 = _r->r30 = _r->r31 = \
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0; \
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} while (0)
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#ifdef __KERNEL__
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#define SET_PERSONALITY(ex) set_personality(PER_LINUX_32BIT)
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#endif
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#endif /* __uClinux__ */
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#endif /* _ASM_MICROBLAZE_ELF_H */
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