source: trunk/libs/newlib/src/libgloss/sparc_leon/busscan.S @ 444

/*
 * Copyright (c) 2011 Aeroflex Gaisler
 *
 * BSD license:
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


!unsigned int ahbslv_scan(register unsigned int vendor,register unsigned int driver) {
!  register unsigned int conf, mbar,i, *confp;
!  register unsigned int cfg_area = (unsigned int ) (LEON3_IO_AREA | LEON3_CONF_AREA | LEON3_AHB_SLAVE_CONF_AREA);
!  for (i = 0; i < LEON3_AHB_SLAVES; i++) 
!  {
!    confp = (unsigned int*)(cfg_area + (i * LEON3_AHB_CONF_WORDS * 4));
!    conf = *confp;
!    //mbar = *(unsigned int*)(i * LEON3_AHB_CONF_WORDS+ (4 * 4));
!    if ((amba_vendor(conf) == vendor) && (amba_device(conf) == driver)) {
!      return (unsigned int)confp;
!    }
!  }
!  return 0;
!}

                 
        .section        ".text"
        .global  ahbslv_scan    
        .align 4
        
ahbslv_scan:
        mov     %o0, %g1
        mov     -2048, %o5
        mov     0, %o3
        sll     %o3, 5, %o0
.LL11:
        add     %o5, %o0, %o4
        ld      [%o5+%o0], %o2
        srl     %o2, 24, %o0
        cmp     %o0, %g1
        bne,a   .LL10
        add     %o3, 1, %o3
        srl     %o2, 12, %o0
        and     %o0, 4095, %o0
        cmp     %o0, %o1
        be      .LL1
        mov     %o4, %o2
        add     %o3, 1, %o3
.LL10:
        cmp     %o3, 7
        bleu,a  .LL11
        sll     %o3, 5, %o0
        mov     0, %o2
.LL1:
        retl
        mov     %o2, %o0


!unsigned int apbslv_scan(register unsigned int base,register unsigned int vendor, register unsigned int driver) {
!  register unsigned int conf, mbar,i, *confp;
!  for (i = 0; i < LEON3_APB_SLAVES; i++) 
!  {
!    confp = (unsigned int*)(base + (i * LEON3_APB_CONF_WORDS * 4));
!    conf = *confp;
!    //mbar = *(unsigned int*)(i * LEON3_AHB_CONF_WORDS+ (4 * 4));
!    if ((amba_vendor(conf) == vendor) && (amba_device(conf) == driver)) {
!      return (unsigned int)confp;
!    }
!  }
!  return 0;
!}


        .section        ".text"
        .align 4
        .global  apbslv_scan
        
apbslv_scan:
        mov     %o0, %g1
        mov     0, %o4
        sll     %o4, 3, %o0
.LL22:
        add     %g1, %o0, %o5
        ld      [%g1+%o0], %o3
        srl     %o3, 24, %o0
        cmp     %o0, %o1
        bne,a   .LL21
        add     %o4, 1, %o4
        srl     %o3, 12, %o0
        and     %o0, 4095, %o0
        cmp     %o0, %o2
        be      .LL12
        mov     %o5, %o3
        add     %o4, 1, %o4
.LL21:
        cmp     %o4, 15
        bleu,a  .LL22
        sll     %o4, 3, %o0
        mov     0, %o3
.LL12:
        retl
        mov     %o3, %o0



!unsigned int getbase(register unsigned int *mbar,register unsigned int iobase) {
!  register unsigned int conf = mbar[1];
!  return ((iobase & 0xfff00000) |
!          ((conf & 0xfff00000)>> 12)) & (((conf & 0x0000fff0) <<4) | 0xfff00000);
!  
!}
        
         
        .section        ".text"
        .align 4
        .global  iobar_getbase

iobar_getbase:
        ld      [%o0+4], %o2
        sethi   %hi(-1048576), %o3
        and     %o1, %o3, %o1
        and     %o2, %o3, %o0
        srl     %o0, 12, %o0
        or      %o1, %o0, %o1
        sethi   %hi(64512), %o0
        or      %o0, 1008, %o0
        and     %o2, %o0, %o2
        sll     %o2, 4, %o2
        or      %o2, %o3, %o2
        and     %o1, %o2, %o1
        retl
        mov     %o1, %o0