![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to vectors.S CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Qemu by Fabrice Bellard] / qemu / roms / openbios / arch / sparc32|
Return to vectors.S CVS log | Up to [Qemu by Fabrice Bellard] / qemu / roms / openbios / arch / sparc32 |
1.1 root 1: /*
2: * <vectors.S>
3: *
4: * Sparc V9 Trap Table(s) with SpitFire/Cheetah extensions.
5: *
6: * Copyright (C) 1996, 2001 David S. Miller ([email protected])
7: *
8: * This program is free software; you can redistribute it and/or
9: * modify it under the terms of the GNU General Public License
10: * version 2 as published by the Free Software Foundation.
11: *
12: * This program is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: * GNU General Public License for more details.
16: *
17: * You should have received a copy of the GNU General Public License
18: * along with this program; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
20: * MA 02110-1301, USA.
21: * This program is free software; you can redistribute it and/or
22: * modify it under the terms of the GNU General Public License V2
23: * as published by the Free Software Foundation
24: */
25:
26: #define __ASSEMBLY
27: #include "psr.h"
28: #include "asm/asi.h"
29: #define SER_ADDR5 0x71100004
30: #define SER_ADDR10 0xf1100004
31:
32: .section ".text.vectors", "ax"
33: .align 4 /* Should be 16384, but alignment is handled by the ldscript */
34: /* Sparc32 trap table */
35: .globl trap_table, t_zero, t_wovf, t_wunf, __divide_error
36: trap_table:
37:
38: #define WINDOW_SPILL \
39: rd %psr, %l0; rd %wim, %l3; b spill_window_entry; nop;
40:
41: #define WINDOW_FILL \
42: rd %psr, %l0; rd %wim, %l3; b fill_window_entry; nop;
43:
44: #define BTRAP(lvl) ba bug; mov lvl, %g1; nop; nop;
45: #define BTRAPS(x) BTRAP(x) BTRAP(x+1) BTRAP(x+2) BTRAP(x+3) BTRAP(x+4) BTRAP(x+5) BTRAP(x+6) BTRAP(x+7)
46: #define TRAP_ENTRY_INTERRUPT(int_level) \
47: sethi %hi(irq_entry ## int_level), %l7; \
48: or %l7, %lo(irq_entry ## int_level), %l7; \
49: jmp %l7; \
50: nop
51:
52: t_zero: b entry; nop; nop; nop;
53: BTRAP(0x1) BTRAP(0x2) BTRAP(0x3) BTRAP(0x4)
54: t_wovf: WINDOW_SPILL /* Window Overflow */
55: t_wunf: WINDOW_FILL /* Window Underflow */
56: BTRAP(0x7)
57: BTRAPS(0x8)
58: #if 0
59: BAD_TRAP(0x10)
60: t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */
61: t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */
62: t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */
63: t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */
64: t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */
65: t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */
66: t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */
67: t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */
68: t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */
69: t_irq10: TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
70: t_irq11: TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */
71: t_irq12: TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */
72: t_irq13: TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */
73: t_irq14: TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
74: t_nmi: BAD_TRAP(0x1f) /* Level 15 (NMI) */
75: #else
76: BTRAPS(0x10)
77: BTRAP(0x18) BTRAP(0x19)
78: t_irq10: TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
79: BTRAP(0x1b) BTRAP(0x1c) BTRAP(0x1d)
80: t_irq14: TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
81: BTRAP(0x1f)
82: #endif
83: BTRAPS(0x20) BTRAPS(0x28)
84: BTRAPS(0x30) BTRAPS(0x38)
85: BTRAPS(0x40) BTRAPS(0x48)
86: BTRAPS(0x50) BTRAPS(0x58)
87: BTRAPS(0x60) BTRAPS(0x68)
88: BTRAPS(0x70) BTRAPS(0x78)
89: BTRAPS(0x80) BTRAPS(0x88)
90: BTRAPS(0x90) BTRAPS(0x98)
91: BTRAPS(0xa0) BTRAPS(0xa8)
92: BTRAPS(0xb0) BTRAPS(0xb8)
93: BTRAPS(0xc0) BTRAPS(0xc8)
94: BTRAPS(0xd0) BTRAPS(0xd8)
95: BTRAPS(0xe0) BTRAPS(0xe8)
96: BTRAPS(0xf0) BTRAPS(0xf8)
97:
98: .section ".text", "ax"
99: .align 4
100: __divide_error:
101: bug:
102: /* Dump the exception and its context */
103: ! Set up CPU state
104: rd %psr, %g2
105: andn %g2, PSR_ET, %g2
106: wr %g2, %psr
107: ! Disable mmu, re-enable boot mode
108: set _start, %g3
109: set dump_exception, %g2
110: sub %g2, %g3, %g3
111: set 3 << 13, %g2
112: jmp %g3
113: sta %g2, [%g0] ASI_M_MMUREGS
114:
115: outstr:
116: /* void outstr (unsigned long port5, unsigned long port10,
117: * const unsigned char *str);
118: * Writes a string on an IO port.
119: */
120: 1: lduba [%o2] ASI_M_KERNELTXT, %o3
121: cmp %o3, 0
122: be 2f
123: nop
124: stba %o3, [%o0] ASI_M_BYPASS
125: stba %o3, [%o1] ASI_M_CTL
126: b 1b
127: inc %o2
128: 2: retl
129: nop
130:
131: outhex:
132: /* void outhex (unsigned long port5, unsigned long port10,
133: * uint32_t value);
134: * Dumps a 32 bits hex number on serial port
135: */
136: mov %o2, %o4
137: set 28, %o3
138: srl %o4, %o3, %o2
139: 1: and %o2, 0xf, %o2
140: cmp %o2, 9
141: bgt 2f
142: nop
143: b 3f
144: add %o2, '0', %o2
145: 2: add %o2, 'a' - 10, %o2
146: 3: stba %o2, [%o0] ASI_M_BYPASS
147: stba %o2, [%o1] ASI_M_CTL
148: subcc %o3, 4, %o3
149: bge 1b
150: srl %o4, %o3, %o2
151: retl
152: nop
153:
154: /* void dump_exception ();
155: *
156: * Dump a message when catching an exception
157: */
158: dump_exception:
159: set SER_ADDR5 + 2, %o0
160: set SER_ADDR10 + 2, %o1
161: set (_BUG_message_0), %o2
162: call outstr
163: nop
164:
165: call outhex
166: mov %g1, %o2
167:
168: set (_BUG_message_1), %o2
169: call outstr
170: nop
171:
172: call outhex
173: mov %l1, %o2
174:
175: set (_BUG_message_2), %o2
176: call outstr
177: nop
178:
179: call outhex
180: mov %l2, %o2
181:
182: set (_BUG_message_3), %o2
183: call outstr
184: nop
185: _forever:
186: /* Loop forever */
187: b _forever ;
188: nop
189:
190: irq_entry10:
191: sethi %hi(counter_regs), %l7
192: ld [%l7 + %lo(counter_regs)], %l7
193: sethi 0x10000, %l6
194: ld [%l7 + %l6], %g0
195: jmp %l1
196: rett %l2
197:
198: irq_entry14:
199: sethi %hi(counter_regs), %l7
200: ld [%l7 + %lo(counter_regs)], %l7
201: ld [%l7], %g0
202: jmp %l1
203: rett %l2
204:
205: /* Register window handlers */
206: #include "wof.S"
207: #include "wuf.S"
208:
209: .section .rodata
210: _BUG_message_0:
211: .string "Unhandled Exception 0x"
212: _BUG_message_1:
213: .string "\r\nPC = 0x"
214: _BUG_message_2:
215: .string " NPC = 0x"
216: _BUG_message_3:
217: .string "\r\nStopping execution\r\n"
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.