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/* =================================================================
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*
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* relocate_ppc.c
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*
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* Relocation types for the PowerPC processor.
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*
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* =================================================================
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* ####ECOSGPLCOPYRIGHTBEGIN####
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* -------------------------------------------
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* This file is part of eCos, the Embedded Configurable Operating System.
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* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
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*
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* eCos is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 or (at your option) any later
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* version.
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*
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* eCos is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with eCos; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* As a special exception, if other files instantiate templates or use
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* macros or inline functions from this file, or you compile this file
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* and link it with other works to produce a work based on this file,
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* this file does not by itself cause the resulting work to be covered by
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* the GNU General Public License. However the source code for this file
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* must still be made available in accordance with section (3) of the GNU
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* General Public License v2.
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*
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* This exception does not invalidate any other reasons why a work based
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* on this file might be covered by the GNU General Public License.
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* -------------------------------------------
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* ####ECOSGPLCOPYRIGHTEND####
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* =================================================================
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* #####DESCRIPTIONBEGIN####
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*
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* Author(s): Anthony Tonizzo (atonizzo@gmail.com)
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* Date: 2005-05-13
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* Purpose:
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* Description:
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*
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* ####DESCRIPTIONEND####
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*
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* =================================================================
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*/
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#include <cyg/infra/diag.h> // For diagnostic printing.
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <cyg/hal/hal_cache.h>
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#include <cyg/hal/hal_io.h>
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#include <pkgconf/objloader.h>
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#include <cyg/objloader/elf.h>
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#include <cyg/objloader/objelf.h>
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#ifdef CYGPKG_HAL_POWERPC
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void
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cyg_ldr_flush_cache(void)
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{
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HAL_DCACHE_SYNC();
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HAL_ICACHE_SYNC();
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}
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#if CYGPKG_SERVICES_OBJLOADER_DEBUG_LEVEL > 1
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// Always 16 characters long, with blank padding is necessary, so
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// the printing is pretty. If the name is longer than 16, shorten it.
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// We print the relocation symbols only is
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// CYGPKG_SERVICES_OBJLOADER_DEBUG_LEVEL is set to 2.
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char *relocation_name[] =
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{
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"", "R_PPC_ADDR32 ", "", "", "R_PPC_ADDR16_LO ", "R_PPC_ADDR16_HI ",
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"R_PPC_ADDR16_HA ", "", "", "", "R_PPC_REL24 ", "", "", "", "", "",
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"", "", "", "", "R_PPC_REL32 "
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};
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#endif
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// in:
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//
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// sym_type Type of relocation to apply,
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// mem Address in memory to modify (relocate).
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// sym_value
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cyg_int32
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cyg_ldr_relocate(cyg_int32 sym_type, cyg_uint32 mem, cyg_int32 sym_value)
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{
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cyg_int32 rel_offset, i;
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// PPC uses rela, so we have to add the addend.
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switch(sym_type)
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{
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case R_PPC_ADDR16_HA:
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HAL_WRITE_UINT16(mem, _ha_(sym_value));
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return 0;
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case R_PPC_ADDR16_HI:
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HAL_WRITE_UINT16(mem, _hi_(sym_value));
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return 0;
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case R_PPC_ADDR16_LO:
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HAL_WRITE_UINT16(mem, _lo_(sym_value));
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return 0;
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case R_PPC_REL24:
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// Now it is time to seek the destination address of the call.
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// We need to do something in case the user jumps more than 16MB.
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rel_offset = (sym_value - mem) & 0x03FFFFFC;
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HAL_READ_UINT32(mem, i);
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i &= 0xFC000003;
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HAL_WRITE_UINT32(mem, rel_offset | i);
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return 0;
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case R_PPC_REL32:
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HAL_WRITE_UINT32(mem, (sym_value - mem));
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return 0;
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case R_PPC_ADDR32:
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HAL_WRITE_UINT32(mem, sym_value);
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return 0;
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default:
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ELFDEBUG("FIXME: Unknown relocation value!!!\n");
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return -1;
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}
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}
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#endif // CYGPKG_HAL_POWERPC
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