diff options
Diffstat (limited to 'libgloss/spu/crt0.S')
| -rw-r--r-- | libgloss/spu/crt0.S | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/libgloss/spu/crt0.S b/libgloss/spu/crt0.S deleted file mode 100644 index 490f6f91d..000000000 --- a/libgloss/spu/crt0.S +++ /dev/null @@ -1,174 +0,0 @@ -/* (C) Copyright IBM Corp. 2005, 2006 -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, -this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright -notice, this list of conditions and the following disclaimer in the -documentation and/or other materials provided with the distribution. - * Neither the name of IBM nor the names of its contributors may be -used to endorse or promote products derived from this software without -specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -*/ - -/* crt0.S - entry function for C Runtime. - * - * With _STD_MAIN switch, the crt0.S will be compiled to crt2.o. - * The crt2.o sets up a C99-style interface for the SPU application's - * main() function, including a local copy of argv strings. - * - * The number of argument strings is passed in R3. The size and EA - * location of the argument vector region is passed in R4. Once the - * argv region is copied to the highest range of LS, and $SP is set - * just below it. - * - * Without _STD_MAIN, the crt0.S is compiled to crt1.o. - * The crt1.o prepares the entry for an SPU module. The main() function - * is called with different parameter list: spu_id, param and env - * are passed by R3, R4 and R5 respectively. - */ - -#ifdef _STD_MAIN -#define MFC_TAG_UPDATE_ALL 2 -#define MFC_GET_CMD 0x40 -#define TAGID 0 -#define TAGMASK 1 -#endif - -.comm __ea_local_store,16,16 - -.text -.global _start -.type _start, @function - -_start: - /* Save the local store base from $6. */ - stqr $6, __ea_local_store - -#ifdef _STD_MAIN - /* - * Copy the argument vector region from EA to LS. The DMA - * parameters are passed in R4: - * - * +-------+-------+-------+-------+ - * R4 | LS | EA-HI | EA-LO | SIZE | - * +-------+-------+-------+-------+ - * word 0 1 2 3 - * - * By the end of this sequence, the prefered slot (word 0) of - * R4 will contain the LS offset of argv region, which also - * serves as the base offset for $SP. - */ - wrch $MFC_LSA, $4 - rotqbyi $4, $4, 4 - wrch $MFC_EAH, $4 - rotqbyi $4, $4, 4 - wrch $MFC_EAL, $4 - rotqbyi $4, $4, 4 - wrch $MFC_Size, $4 - rotqbyi $4, $4, 4 - il $LR, TAGID - wrch $MFC_TagID, $LR - - /* Issue MFC_GET_CMD, then wait for transfer of argument - * vector region to complete. - */ - il $LR, MFC_GET_CMD - wrch $MFC_Cmd, $LR - il $LR, TAGMASK - wrch $MFC_WrTagMask, $LR - il $LR, MFC_TAG_UPDATE_ALL - wrch $MFC_WrTagUpdate, $LR - rdch $LR, $MFC_RdTagStat -#endif - - /* Save parameter list of main function to the non-volatile - * registers. spu_thread module has three parameters, while - * spulet only has two. - */ - ori $80, $3, 0 - ori $81, $4, 0 -#ifndef _STD_MAIN - ori $82, $5, 0 -#endif - - /* The Link Register is initialized to NULL. - */ - il $LR, 0 - -#ifdef _STD_MAIN - /* For spulet, initialize stack pointer just below the argv region. - */ - ai $SP,$4,-16 -#else - /* For spe_thread module, the stack pointer is initialized - * below the area where __stack points to. - */ - ila $SP,__stack -#endif - /* Initialize back chain to NULL. - */ - stqd $LR,0($SP) - - /* Allocate 2 slots for stack frame. - */ - stqd $SP,-32($SP) - ai $SP,$SP,-32 - - /* Save the Link Register in Link Register Save Area. - */ - stqd $LR,16($SP) - - /* Calculate stack size. - */ - ila $3,_end - sf $3,$3,$SP - rotqbyi $3,$3,12 - - /* The BE Linux ABI passes the stack size in $2, or use - * the default if $2 == 0. - */ - rotqbyi $4,$2,12 - ceqi $5,$4,0 - selb $3,$4,$3,$5 - fsmbi $4,3840 - selb $SP,$SP,$3,$4 - - /* Call the _init function. - */ - brsl $LR, _init - - /* Call the _fini function at exit time. - */ - ila $3, _fini - brsl $LR, atexit - - ori $3,$80,0 - ori $4,$81,0 -#ifndef _STD_MAIN - ori $5,$82,0 -#endif - - /* Call the programs main. - */ - brsl $LR, main - - /* Call exit. - */ - brsl $LR, exit - |