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# XSTORMY16 startup code for GDB stub.
 
# CPU Data for Sanyo EVA debugger at 0x7F00
        .section .cpudata,"ax"
        .byte   0x00,0x02,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x44,0x35,0x39,0x52,0x30,0x30,0x30,0x30,0x2E,0x4F,0x50,0x54,0x00,0x00,0x00,0x00
        .byte   0x4c,0x43,0x35,0x39,0x52,0x30,0x30,0x30,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x80,0x00,0x20,0x48,0x00,0x00,0x00
        .byte   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x20,0x01,0x12,0x31,0x23,0x59
 
# Interrupt vectors at 0x8000.
        .section .int_vec,"ax"
        .global _start
        .align 1
_start:
        ;; Reset, watchdog timer interrupt
        jmpf _int_reset
        ;; base timer interrupt
        jmpf _int_basetimer
        ;; timer 0
        jmpf _int_timer0
        ;; timer 1
        jmpf _int_timer1
        ;; SIO0 interrupt
        jmpf _int_sio0
        ;; SIO1 interrupt
        jmpf _int_sio1
        ;; port0 interrupt
        jmpf _int_port0
        ;; port1 interrupt
        jmpf _int_port1
 
        .org 0x80
        ;; sys interrupt (0x8080)
        jmpf _int_sys
 
        ;; Application void write(char *buf, int nbytes)
        ;; This jmps to a stub function to packetize the buf for GDB
        jmpf gdb_write
        ;; Application int read(char *buf, int nbytes)
        jmpf gdb_read
 
        .text
# Reset code, set up memory and call main.
_int_reset:
        ;; Set up the application stack pointer.
        mov sp,#0x002
 
        ;; Zero the data space
        mov r0,#_edata
        mov r1,#_end
        mov r2,#0
0:       mov.w (r0++),r2
        blt r0,r1,0b
 
        ;; Init the UART
        callf uart_init
 
        ;; Turn on illegal insn trap
        mov   r0,r14
        set1  r0,#11
        mov   r14,r0
        mov.b 0x7f08,#0x11
        mov.b 0x7f09,#0x10
 
        ;; "breakpoint" sends us into stub.
0:
        .hword 0x0006
        br  0b
 
_int_sys:
        push  r13
        mov   r13,#registers
        mov.w (r13++),r0
        mov.w (r13++),r1
        mov.w (r13++),r2
        mov.w (r13++),r3
        mov.w (r13++),r4
        mov.w (r13++),r5
        mov.w (r13++),r6
        mov.w (r13++),r7
        mov   r0,r8
        mov.w (r13++),r0
        mov   r0,r9
        mov.w (r13++),r0
        mov   r0,r10
        mov.w (r13++),r0
        mov   r0,r11
        mov.w (r13++),r0
        mov   r0,r12
        mov.w (r13++),r0
        pop   r0
        mov.w (r13++),r0    ; R13
        pop   r0
        mov.w (r13++),r0    ; PSW
        mov   r0,r15
        sub   r0,#4
        mov.w (r13++),r0    ; SP
        pop   r0
        pop   r1
        mov.w (r13++),r1    ; PCL
        mov.w (r13++),r0    ; PCH
 
        ;; switch to stub stack and invoke stub
        mov sp,#0x700
        callf handle_exception
 
        mov   r0,#registers+34
        mov.w r1,(r0)           ; PCH
        mov.w r2,(--r0)         ; PCL
        mov.w r3,(--r0)         ; SP
        mov   r15,r3
        push  r2
        push  r1
        mov.w r1,(--r0)    ; PSW
        push  r1
        mov.w r1,(--r0)
        mov   r13,r1
        mov.w r1,(--r0)
        mov   r12,r1
        mov.w r1,(--r0)
        mov   r11,r1
        mov.w r1,(--r0)
        mov   r10,r1
        mov.w r1,(--r0)
        mov   r9,r1
        mov.w r1,(--r0)
        mov   r8,r1
        mov.w r7,(--r0)
        mov.w r6,(--r0)
        mov.w r5,(--r0)
        mov.w r4,(--r0)
        mov.w r3,(--r0)
        mov.w r2,(--r0)
        mov.w r1,(--r0)
        mov.w r0,(--r0)
        iret
1:      .size _int_sys,1b-_int_sys
 
 

Line No.	Rev	Author	Line
1	207	jeremybenn	`# XSTORMY16 startup code for GDB stub.`
2
3			`# CPU Data for Sanyo EVA debugger at 0x7F00`
4			`.section .cpudata,"ax"`
5			`.byte 0x00,0x02,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
6			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
7			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
8			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
9			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
10			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
11			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
12			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
13			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
14			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
15			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
16			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
17			`.byte 0x44,0x35,0x39,0x52,0x30,0x30,0x30,0x30,0x2E,0x4F,0x50,0x54,0x00,0x00,0x00,0x00`
18			`.byte 0x4c,0x43,0x35,0x39,0x52,0x30,0x30,0x30,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00`
19			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x80,0x00,0x20,0x48,0x00,0x00,0x00`
20			`.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x20,0x01,0x12,0x31,0x23,0x59`
21
22			`# Interrupt vectors at 0x8000.`
23			`.section .int_vec,"ax"`
24			`.global _start`
25			`.align 1`
26			`_start:`
27			`;; Reset, watchdog timer interrupt`
28			`jmpf _int_reset`
29			`;; base timer interrupt`
30			`jmpf _int_basetimer`
31			`;; timer 0`
32			`jmpf _int_timer0`
33			`;; timer 1`
34			`jmpf _int_timer1`
35			`;; SIO0 interrupt`
36			`jmpf _int_sio0`
37			`;; SIO1 interrupt`
38			`jmpf _int_sio1`
39			`;; port0 interrupt`
40			`jmpf _int_port0`
41			`;; port1 interrupt`
42			`jmpf _int_port1`
43
44			`.org 0x80`
45			`;; sys interrupt (0x8080)`
46			`jmpf _int_sys`
47
48			`;; Application void write(char *buf, int nbytes)`
49			`;; This jmps to a stub function to packetize the buf for GDB`
50			`jmpf gdb_write`
51			`;; Application int read(char *buf, int nbytes)`
52			`jmpf gdb_read`
53
54			`.text`
55			`# Reset code, set up memory and call main.`
56			`_int_reset:`
57			`;; Set up the application stack pointer.`
58			`mov sp,#0x002`
59
60			`;; Zero the data space`
61			`mov r0,#_edata`
62			`mov r1,#_end`
63			`mov r2,#0`
64			`0: mov.w (r0++),r2`
65			`blt r0,r1,0b`
66
67			`;; Init the UART`
68			`callf uart_init`
69
70			`;; Turn on illegal insn trap`
71			`mov r0,r14`
72			`set1 r0,#11`
73			`mov r14,r0`
74			`mov.b 0x7f08,#0x11`
75			`mov.b 0x7f09,#0x10`
76
77			`;; "breakpoint" sends us into stub.`
78			`0:`
79			`.hword 0x0006`
80			`br 0b`
81
82			`_int_sys:`
83			`push r13`
84			`mov r13,#registers`
85			`mov.w (r13++),r0`
86			`mov.w (r13++),r1`
87			`mov.w (r13++),r2`
88			`mov.w (r13++),r3`
89			`mov.w (r13++),r4`
90			`mov.w (r13++),r5`
91			`mov.w (r13++),r6`
92			`mov.w (r13++),r7`
93			`mov r0,r8`
94			`mov.w (r13++),r0`
95			`mov r0,r9`
96			`mov.w (r13++),r0`
97			`mov r0,r10`
98			`mov.w (r13++),r0`
99			`mov r0,r11`
100			`mov.w (r13++),r0`
101			`mov r0,r12`
102			`mov.w (r13++),r0`
103			`pop r0`
104			`mov.w (r13++),r0 ; R13`
105			`pop r0`
106			`mov.w (r13++),r0 ; PSW`
107			`mov r0,r15`
108			`sub r0,#4`
109			`mov.w (r13++),r0 ; SP`
110			`pop r0`
111			`pop r1`
112			`mov.w (r13++),r1 ; PCL`
113			`mov.w (r13++),r0 ; PCH`
114
115			`;; switch to stub stack and invoke stub`
116			`mov sp,#0x700`
117			`callf handle_exception`
118
119			`mov r0,#registers+34`
120			`mov.w r1,(r0) ; PCH`
121			`mov.w r2,(--r0) ; PCL`
122			`mov.w r3,(--r0) ; SP`
123			`mov r15,r3`
124			`push r2`
125			`push r1`
126			`mov.w r1,(--r0) ; PSW`
127			`push r1`
128			`mov.w r1,(--r0)`
129			`mov r13,r1`
130			`mov.w r1,(--r0)`
131			`mov r12,r1`
132			`mov.w r1,(--r0)`
133			`mov r11,r1`
134			`mov.w r1,(--r0)`
135			`mov r10,r1`
136			`mov.w r1,(--r0)`
137			`mov r9,r1`
138			`mov.w r1,(--r0)`
139			`mov r8,r1`
140			`mov.w r7,(--r0)`
141			`mov.w r6,(--r0)`
142			`mov.w r5,(--r0)`
143			`mov.w r4,(--r0)`
144			`mov.w r3,(--r0)`
145			`mov.w r2,(--r0)`
146			`mov.w r1,(--r0)`
147			`mov.w r0,(--r0)`
148			`iret`
149			`1: .size _int_sys,1b-_int_sys`
150
151

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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [xstormy16/] [crt0_stub.s] - Blame information for rev 258