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/*
 *  Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
 *           Bernd Becker (becker@faw.uni-ulm.de)
 *
 *  COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 *  Modified to reflect Hitachi EDK SH7045F:
 *  John M. Mills (jmills@tga.com)
 *  TGA Technologies, Inc.
 *  100 Pinnacle Way, Suite 140
 *  Norcross, GA 30071 U.S.A.
 *
 *
 *  This modified file may be copied and distributed in accordance
 *  the above-referenced license. It is provided for critique and
 *  developmental purposes without any warranty nor representation
 *  by the authors or by TGA Technologies.
 *
 *  COPYRIGHT (c) 1999.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: start.S,v 1.2 2001-09-27 12:01:12 chris Exp $
 */
 
#include "asm.h"
 
        BEGIN_CODE
        PUBLIC(start)
 
SYM (start):
        ! install the stack pointer
        mov.l   stack_k,r15
 
#ifdef  START_HW_INIT   /* from $RTEMS_BSP.cfg */
        ! Initialize minimal hardware
        mov.l   hw_init_k, r0
        jsr @r0
        nop             !dead slot
#endif /* START_HW_INIT */
 
        ! zero out bss
        mov.l   edata_k,r0
        mov.l   end_k,r1
        mov     #0,r2
0:
        mov.l   r2,@r0
        add     #4,r0
        cmp/ge  r0,r1
        bt      0b
 
        ! copy the vector table from rom to ram
        mov.l   vects_k,r0      ! vectab
        mov     #0,r1           ! address of boot vector table
        mov     #0,r2           ! number of bytes copied
        mov.w   vects_size,r3   ! size of entries in vectab
1:
        mov.l   @r1+,r4
        mov.l   r4,@r0
        add     #4,r0
        add     #1,r2
        cmp/hi  r3,r2
        bf      1b
 
#ifndef STANDALONE_EVB
        ! overlay monitor vectors onto RTEMS table template
        ! code adapted  from Hitachi EDK7045F User Manual: "Copyvect.s"
        mova    vects_k,r0
        mov.l   @r0, r1 ! Shadow vect tbl addr
        stc             vbr, r2 ! Original vect tbl addr
        and             #0, r0
        mov             r0, r4  ! 0 in r4 and r0
 
!trapa #32
        or              #0x80, r0
        mov.l   @(r0,r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
 
!cpu addr err
        or              #0x24, r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
 
!ill slot
        or              #0x18, r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
 
!ill inst
        or              #0x10, r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
 
!nmi
        or              #0x2c, r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
 
!User brk
        or              #0x30, r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
 
!sci0 err
        or              #0x80, r0
        rotl    r0
        rotl    r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
        mov             r4, r0
!sci rx
        or              #0x81, r0
        rotl    r0
        rotl    r0
        mov.l   @(r0, r2), r3
        mov.l   r3, @(r0, r1)
 
        stc     vbr,r3          ! capture copy of monitor vbr
        mov.l   vbrtemp_k,r0
        mov.l   r3, @r0
        mov.l   vects_k,r0      ! point vbr to vectab
        ldc     r0,vbr
#endif  ! STANDALONE_EVB
 
        ! call the mainline
        mov #0,r4               ! argc
        mov.l main_k,r0
        jsr @r0
        mov #0,r5               ! argv - can place in dead slot
 
        ! call exit
        mov     r0,r4
        mov.l   exit_k,r0
        jsr     @r0
        or      r0,r0
 
        mov.l   vbrtemp_k,r0    ! restore original vbr
        mov.l   @r0,r3
        ldc     r3, vbr
        trapa   #13             ! UBR capture by monitor
        nop             !debug dead-slot target
 
        END_CODE
 
        .align 2
stack_k:
        .long   SYM(stack)
edata_k:
        .long   SYM(edata)
end_k:
        .long   SYM(end)
main_k:
        .long   SYM(boot_card)
exit_k:
        .long   SYM(exit)
#ifdef  START_HW_INIT   /* from $RTEMS_BSP.cfg */
hw_init_k:
        .long   SYM(early_hw_init)
#endif /* START_HW_INIT */
vbrtemp_k:
        .long   SYM(vbrtemp)
vects_k:
        .long   SYM(vectab)
vects_size:
        .word   255
 
#ifdef __ELF__
        .section .stack,"aw"
#else
        .section .stack
#endif
SYM(stack):
        .long   0xdeaddead
 
#ifdef __ELF__
        .section .bss,"aw"
#else
        .section .bss
#endif
SYM(vbrtemp):
        .long   0x0
 

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and`
3			`* Bernd Becker (becker@faw.uni-ulm.de)`
4			`*`
5			`* COPYRIGHT (c) 1997-1998, FAW Ulm, Germany`
6			`*`
7			`* This program is distributed in the hope that it will be useful,`
8			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
9			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.`
10			`*`
11			`* Modified to reflect Hitachi EDK SH7045F:`
12			`* John M. Mills (jmills@tga.com)`
13			`* TGA Technologies, Inc.`
14			`* 100 Pinnacle Way, Suite 140`
15			`* Norcross, GA 30071 U.S.A.`
16			`*`
17			`*`
18			`* This modified file may be copied and distributed in accordance`
19			`* the above-referenced license. It is provided for critique and`
20			`* developmental purposes without any warranty nor representation`
21			`* by the authors or by TGA Technologies.`
22			`*`
23			`* COPYRIGHT (c) 1999.`
24			`* On-Line Applications Research Corporation (OAR).`
25			`* Copyright assigned to U.S. Government, 1994.`
26			`*`
27			`* The license and distribution terms for this file may be`
28			`* found in the file LICENSE in this distribution or at`
29			`* http://www.OARcorp.com/rtems/license.html.`
30			`*`
31			`* $Id: start.S,v 1.2 2001-09-27 12:01:12 chris Exp $`
32			`*/`
33
34			`#include "asm.h"`
35
36			`BEGIN_CODE`
37			`PUBLIC(start)`
38
39			`SYM (start):`
40			`! install the stack pointer`
41			`mov.l stack_k,r15`
42
43			`#ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */`
44			`! Initialize minimal hardware`
45			`mov.l hw_init_k, r0`
46			`jsr @r0`
47			`nop !dead slot`
48			`#endif /* START_HW_INIT */`
49
50			`! zero out bss`
51			`mov.l edata_k,r0`
52			`mov.l end_k,r1`
53			`mov #0,r2`
54			`0:`
55			`mov.l r2,@r0`
56			`add #4,r0`
57			`cmp/ge r0,r1`
58			`bt 0b`
59
60			`! copy the vector table from rom to ram`
61			`mov.l vects_k,r0 ! vectab`
62			`mov #0,r1 ! address of boot vector table`
63			`mov #0,r2 ! number of bytes copied`
64			`mov.w vects_size,r3 ! size of entries in vectab`
65			`1:`
66			`mov.l @r1+,r4`
67			`mov.l r4,@r0`
68			`add #4,r0`
69			`add #1,r2`
70			`cmp/hi r3,r2`
71			`bf 1b`
72
73			`#ifndef STANDALONE_EVB`
74			`! overlay monitor vectors onto RTEMS table template`
75			`! code adapted from Hitachi EDK7045F User Manual: "Copyvect.s"`
76			`mova vects_k,r0`
77			`mov.l @r0, r1 ! Shadow vect tbl addr`
78			`stc vbr, r2 ! Original vect tbl addr`
79			`and #0, r0`
80			`mov r0, r4 ! 0 in r4 and r0`
81
82			`!trapa #32`
83			`or #0x80, r0`
84			`mov.l @(r0,r2), r3`
85			`mov.l r3, @(r0, r1)`
86			`mov r4, r0`
87
88			`!cpu addr err`
89			`or #0x24, r0`
90			`mov.l @(r0, r2), r3`
91			`mov.l r3, @(r0, r1)`
92			`mov r4, r0`
93
94			`!ill slot`
95			`or #0x18, r0`
96			`mov.l @(r0, r2), r3`
97			`mov.l r3, @(r0, r1)`
98			`mov r4, r0`
99
100			`!ill inst`
101			`or #0x10, r0`
102			`mov.l @(r0, r2), r3`
103			`mov.l r3, @(r0, r1)`
104			`mov r4, r0`
105
106			`!nmi`
107			`or #0x2c, r0`
108			`mov.l @(r0, r2), r3`
109			`mov.l r3, @(r0, r1)`
110			`mov r4, r0`
111
112			`!User brk`
113			`or #0x30, r0`
114			`mov.l @(r0, r2), r3`
115			`mov.l r3, @(r0, r1)`
116			`mov r4, r0`
117
118			`!sci0 err`
119			`or #0x80, r0`
120			`rotl r0`
121			`rotl r0`
122			`mov.l @(r0, r2), r3`
123			`mov.l r3, @(r0, r1)`
124			`mov r4, r0`
125			`!sci rx`
126			`or #0x81, r0`
127			`rotl r0`
128			`rotl r0`
129			`mov.l @(r0, r2), r3`
130			`mov.l r3, @(r0, r1)`
131
132			`stc vbr,r3 ! capture copy of monitor vbr`
133			`mov.l vbrtemp_k,r0`
134			`mov.l r3, @r0`
135			`mov.l vects_k,r0 ! point vbr to vectab`
136			`ldc r0,vbr`
137			`#endif ! STANDALONE_EVB`
138
139			`! call the mainline`
140			`mov #0,r4 ! argc`
141			`mov.l main_k,r0`
142			`jsr @r0`
143			`mov #0,r5 ! argv - can place in dead slot`
144
145			`! call exit`
146			`mov r0,r4`
147			`mov.l exit_k,r0`
148			`jsr @r0`
149			`or r0,r0`
150
151			`mov.l vbrtemp_k,r0 ! restore original vbr`
152			`mov.l @r0,r3`
153			`ldc r3, vbr`
154			`trapa #13 ! UBR capture by monitor`
155			`nop !debug dead-slot target`
156
157			`END_CODE`
158
159			`.align 2`
160			`stack_k:`
161			`.long SYM(stack)`
162			`edata_k:`
163			`.long SYM(edata)`
164			`end_k:`
165			`.long SYM(end)`
166			`main_k:`
167			`.long SYM(boot_card)`
168			`exit_k:`
169			`.long SYM(exit)`
170			`#ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */`
171			`hw_init_k:`
172			`.long SYM(early_hw_init)`
173			`#endif /* START_HW_INIT */`
174			`vbrtemp_k:`
175			`.long SYM(vbrtemp)`
176			`vects_k:`
177			`.long SYM(vectab)`
178			`vects_size:`
179			`.word 255`
180
181			`#ifdef __ELF__`
182			`.section .stack,"aw"`
183			`#else`
184			`.section .stack`
185			`#endif`
186			`SYM(stack):`
187			`.long 0xdeaddead`
188
189			`#ifdef __ELF__`
190			`.section .bss,"aw"`
191			`#else`
192			`.section .bss`
193			`#endif`
194			`SYM(vbrtemp):`
195			`.long 0x0`
196

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [sh/] [gensh2/] [start/] [start.S] - Blame information for rev 30