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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.
 *
 *
 *  COPYRIGHT (c) 1998.
 *  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.
 *
 *  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.
 *
 *  $Id: start.ram,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             !debug dead-slot target
#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
        nop             !debug dead-slot target
 
        ! 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
        nop             !debug dead-slot target
 
        ! 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
 
        ! call the mainline
        mov #0,r4               ! argc
        mov #0,r5               ! argv - can place in dead slot
        mov.l main_k,r0
        jsr @r0
        nop             !debug dead-slot target
 
        ! call exit
        mov     r0,r4
        mov.l   exit_k,r0
        or      r0,r0
        jsr     @r0
        nop             !debug dead-slot target
 
        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(hw_initialize)
#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			`*`
12			`* COPYRIGHT (c) 1998.`
13			`* On-Line Applications Research Corporation (OAR).`
14			`* Copyright assigned to U.S. Government, 1994.`
15			`*`
16			`* The license and distribution terms for this file may be`
17			`* found in the file LICENSE in this distribution or at`
18			`* http://www.OARcorp.com/rtems/license.html.`
19			`*`
20			`* Modified to reflect Hitachi EDK SH7045F:`
21			`* John M. Mills (jmills@tga.com)`
22			`* TGA Technologies, Inc.`
23			`* 100 Pinnacle Way, Suite 140`
24			`* Norcross, GA 30071 U.S.A.`
25			`*`
26			`*`
27			`* This modified file may be copied and distributed in accordance`
28			`* the above-referenced license. It is provided for critique and`
29			`* developmental purposes without any warranty nor representation`
30			`* by the authors or by TGA Technologies.`
31			`*`
32			`* $Id: start.ram,v 1.2 2001-09-27 12:01:12 chris Exp $`
33			`*/`
34
35			`#include "asm.h"`
36
37			`BEGIN_CODE`
38			`PUBLIC(start)`
39
40			`SYM (start):`
41			`! install the stack pointer`
42			`mov.l stack_k,r15`
43
44			`#ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */`
45			`! Initialize minimal hardware`
46			`mov.l hw_init_k, r0`
47			`jsr @r0`
48			`nop !debug dead-slot target`
49			`#endif /* START_HW_INIT */`
50
51			`! zero out bss`
52			`mov.l edata_k,r0`
53			`mov.l end_k,r1`
54			`mov #0,r2`
55			`0:`
56			`mov.l r2,@r0`
57			`add #4,r0`
58			`cmp/ge r0,r1`
59			`bt 0b`
60			`nop !debug dead-slot target`
61
62			`! copy the vector table from rom to ram`
63			`mov.l vects_k,r0 ! vectab`
64			`mov #0,r1 ! address of boot vector table`
65			`mov #0,r2 ! number of bytes copied`
66			`mov.w vects_size,r3 ! size of entries in vectab`
67			`1:`
68			`mov.l @r1+,r4`
69			`mov.l r4,@r0`
70			`add #4,r0`
71			`add #1,r2`
72			`cmp/hi r3,r2`
73			`bf 1b`
74			`nop !debug dead-slot target`
75
76			`! overlay monitor vectors onto RTEMS table template`
77			`! code adapted from Hitachi EDK7045F User Manual: "Copyvect.s"`
78			`mova vects_k,r0`
79			`mov.l @r0, r1 ! Shadow vect tbl addr`
80			`stc vbr, r2 ! Original vect tbl addr`
81			`and #0, r0`
82			`mov r0, r4 ! 0 in r4 and r0`
83
84			`!trapa #32`
85			`or #0x80, r0`
86			`mov.l @(r0,r2), r3`
87			`mov.l r3, @(r0, r1)`
88			`mov r4, r0`
89
90			`!cpu addr err`
91			`or #0x24, r0`
92			`mov.l @(r0, r2), r3`
93			`mov.l r3, @(r0, r1)`
94			`mov r4, r0`
95
96			`!ill slot`
97			`or #0x18, r0`
98			`mov.l @(r0, r2), r3`
99			`mov.l r3, @(r0, r1)`
100			`mov r4, r0`
101
102			`!ill inst`
103			`or #0x10, r0`
104			`mov.l @(r0, r2), r3`
105			`mov.l r3, @(r0, r1)`
106			`mov r4, r0`
107
108			`!nmi`
109			`or #0x2c, r0`
110			`mov.l @(r0, r2), r3`
111			`mov.l r3, @(r0, r1)`
112			`mov r4, r0`
113
114			`!User brk`
115			`or #0x30, r0`
116			`mov.l @(r0, r2), r3`
117			`mov.l r3, @(r0, r1)`
118			`mov r4, r0`
119
120			`!sci0 err`
121			`or #0x80, r0`
122			`rotl r0`
123			`rotl r0`
124			`mov.l @(r0, r2), r3`
125			`mov.l r3, @(r0, r1)`
126			`mov r4, r0`
127			`!sci rx`
128			`or #0x81, r0`
129			`rotl r0`
130			`rotl r0`
131			`mov.l @(r0, r2), r3`
132			`mov.l r3, @(r0, r1)`
133
134			`stc vbr,r3 ! capture copy of monitor vbr`
135			`mov.l vbrtemp_k,r0`
136			`mov.l r3, @r0`
137			`mov.l vects_k,r0 ! point vbr to vectab`
138			`ldc r0,vbr`
139
140			`! call the mainline`
141			`mov #0,r4 ! argc`
142			`mov #0,r5 ! argv - can place in dead slot`
143			`mov.l main_k,r0`
144			`jsr @r0`
145			`nop !debug dead-slot target`
146
147			`! call exit`
148			`mov r0,r4`
149			`mov.l exit_k,r0`
150			`or r0,r0`
151			`jsr @r0`
152			`nop !debug dead-slot target`
153
154			`mov.l vbrtemp_k,r0 ! restore original vbr`
155			`mov.l @r0,r3`
156			`ldc r3, vbr`
157			`trapa #13 ! UBR capture by monitor`
158			`nop !debug dead-slot target`
159
160			`END_CODE`
161
162			`.align 2`
163			`stack_k:`
164			`.long SYM(stack)`
165			`edata_k:`
166			`.long SYM(edata)`
167			`end_k:`
168			`.long SYM(end)`
169			`main_k:`
170			`.long SYM(boot_card)`
171			`exit_k:`
172			`.long SYM(exit)`
173			`#ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */`
174			`hw_init_k:`
175			`.long SYM(hw_initialize)`
176			`#endif /* START_HW_INIT */`
177			`vbrtemp_k:`
178			`.long SYM(vbrtemp)`
179			`vects_k:`
180			`.long SYM(vectab)`
181			`vects_size:`
182			`.word 255`
183
184			`#ifdef __ELF__`
185			`.section .stack,"aw"`
186			`#else`
187			`.section .stack`
188			`#endif`
189			`SYM(stack):`
190			`.long 0xdeaddead`
191
192			`#ifdef __ELF__`
193			`.section .bss,"aw"`
194			`#else`
195			`.section .bss`
196			`#endif`
197			`SYM(vbrtemp):`
198			`.long 0x0`
199

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [sh/] [gensh2/] [start/] [start.ram] - Blame information for rev 173