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  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/SLOF/board-qemu/llfw/stage2_head.S
 
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/******************************************************************************
 
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 * Copyright (c) 2004, 2011 IBM Corporation
 
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 * All rights reserved.
 
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 * This program and the accompanying materials
 
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 * are made available under the terms of the BSD License
 
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 * which accompanies this distribution, and is available at
 
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 * http://www.opensource.org/licenses/bsd-license.php
 
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 *
 
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 * Contributors:
 
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 *     IBM Corporation - initial implementation
 
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 *****************************************************************************/
 
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#include "macros.h"
 
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#include "../../llfw/boot_abort.h"
 
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/*#################### defines #####################*/
 
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#define STACK_SIZE   0x4000
 
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/*#################### code ########################*/
 
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        .text
 
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        .globl .gluon_c_entry
 
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        .globl __toc_start
 
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        .globl __toc_end
 
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        .globl __bss_start
 
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        .globl __bss_size
 
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        .globl __start
 
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ASM_ENTRY(__startC)
 
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        /* clear out bss section                */
 
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        LOAD64(r3, (__bss_start - 8))
 
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        LOAD64(r4, __bss_size)
 
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        /* divide __bss_size by 8 to get number */
 
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        /* of dwords to clear                   */
 
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        srwi.   r4, r4, 3
 
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        beq     bsscdone
 
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        li      r5, 0
 
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        mtctr   r4
 
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bssc:   stdu    r5, 8(r3)
 
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        bdnz    bssc
 
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bsscdone:
 
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        /* setup stack                          */
 
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        LOAD64(r1, __stack_end + STACK_SIZE)
 
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        /* save return address beside stack     */
 
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        addi    r3, r1, 128
 
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        mflr    r0
 
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        std     r0, 0(r3)
 
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        /* setup toc                            */
 
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        bl      toc_init
 
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        /* ------------------------------------ */
 
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        /* jump to c-code                       */
 
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        /* r31 = fdt                    - r5    */
 
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        /* ------------------------------------ */
 
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        li      r3, r0
 
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        mr      r4, r31
 
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        bl      .early_c_entry
 
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        /* return to caller...                  */
 
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        LOAD64(r1, __stack_end + STACK_SIZE)
 
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        addi    r1, r1, 128
 
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        ld      r3, 0(r1)
 
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        mtlr    r3
 
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        blr
 
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        /* #################################### */
 
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        /* Basic Additional Functions           */
 
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        /* for extended lib functions see       */
 
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        /* external library                     */
 
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        /* #################################### */
 
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        .align  2
 
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        /* ------------------------------------ */
 
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        /* updates toc in r2                    */
 
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        /* ------------------------------------ */
 
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ASM_ENTRY(toc_init)
 
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        LOAD64(r2, __toc_start)
 
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        blr
 
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        /* ------------------------------------ */
 
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        /* stores arg#1 in r27 and stops        */
 
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        /* ------------------------------------ */
 
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ENTRY(do_panic)
 
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ENTRY(halt_sys)
 
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        BOOT_ABORT_R3HINT(ABORT_CANIO, ALTBOOT, msg_e_ierror);
 
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        .section ".bss"
 
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        .balign STACK_SIZE
 
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__stack_end:
 
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        .space STACK_SIZE
 
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        .text