/*
* <vectors.S>
*
* Sparc V9 Trap Table(s) with SpitFire/Cheetah extensions.
*
* Copyright (C) 1996, 2001 David S. Miller (davem@caip.rutgers.edu)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*/
#define __ASSEMBLY
#include "psr.h"
#include "asm/asi.h"
#define SER_ADDR5 0x71100004
#define SER_ADDR10 0xf1100004
.section ".text.vectors", "ax"
.align 4 /* Should be 16384, but alignment is handled by the ldscript */
/* Sparc32 trap table */
.globl trap_table, t_zero, t_wovf, t_wunf, __divide_error
trap_table:
#define WINDOW_SPILL \
rd %psr, %l0; rd %wim, %l3; b spill_window_entry; nop;
#define WINDOW_FILL \
rd %psr, %l0; rd %wim, %l3; b fill_window_entry; nop;
#define TRAP_DFAULT(lvl) \
rd %psr, %l0; rd %wim, %l3; b handle_dfault; mov lvl, %l7;
#define BTRAP(lvl) ba bug; mov lvl, %g1; nop; nop;
#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)
#define TRAP_ENTRY_INTERRUPT(int_level) \
sethi %hi(irq_entry ## int_level), %l7; \
or %l7, %lo(irq_entry ## int_level), %l7; \
jmp %l7; \
nop
t_zero: b entry; nop; nop; nop;
BTRAP(0x1) BTRAP(0x2) BTRAP(0x3) BTRAP(0x4)
t_wovf: WINDOW_SPILL /* Window Overflow */
t_wunf: WINDOW_FILL /* Window Underflow */
BTRAP(0x7)
BTRAP(0x8)
TRAP_DFAULT(0x9)
BTRAP(0xa) BTRAP(0xb) BTRAP(0xc) BTRAP(0xd) BTRAP(0xe) BTRAP(0xf)
#if 0
BAD_TRAP(0x10)
t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */
t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */
t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */
t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */
t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */
t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */
t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */
t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */
t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */
t_irq10: TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
t_irq11: TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */
t_irq12: TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */
t_irq13: TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */
t_irq14: TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
t_nmi: BAD_TRAP(0x1f) /* Level 15 (NMI) */
#else
BTRAPS(0x10)
BTRAP(0x18) BTRAP(0x19)
t_irq10: TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
BTRAP(0x1b) BTRAP(0x1c) BTRAP(0x1d)
t_irq14: TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
BTRAP(0x1f)
#endif
BTRAPS(0x20)
BTRAP(0x28)
TRAP_DFAULT(0x29)
BTRAP(0x2a) BTRAP(0x2b) BTRAP(0x2c) BTRAP(0x2d) BTRAP(0x2e) BTRAP(0x2f)
BTRAPS(0x30) BTRAPS(0x38)
BTRAPS(0x40) BTRAPS(0x48)
BTRAPS(0x50) BTRAPS(0x58)
BTRAPS(0x60) BTRAPS(0x68)
BTRAPS(0x70) BTRAPS(0x78)
BTRAPS(0x80) BTRAPS(0x88)
BTRAPS(0x90) BTRAPS(0x98)
BTRAPS(0xa0) BTRAPS(0xa8)
BTRAPS(0xb0) BTRAPS(0xb8)
BTRAPS(0xc0) BTRAPS(0xc8)
BTRAPS(0xd0) BTRAPS(0xd8)
BTRAPS(0xe0) BTRAPS(0xe8)
BTRAPS(0xf0) BTRAPS(0xf8)
.section ".text", "ax"
.align 4
__divide_error:
bug:
/* Dump the exception and its context */
! Set up CPU state
rd %psr, %g2
andn %g2, PSR_ET, %g2
wr %g2, %psr
! Disable mmu, re-enable boot mode
set _start, %g3
set dump_exception, %g2
sub %g2, %g3, %g3
set 3 << 13, %g2
jmp %g3
sta %g2, [%g0] ASI_M_MMUREGS
outstr:
/* void outstr (unsigned long port5, unsigned long port10,
* const unsigned char *str);
* Writes a string on an IO port.
*/
1: lduba [%o2] ASI_M_KERNELTXT, %o3
cmp %o3, 0
be 2f
nop
stba %o3, [%o0] ASI_M_BYPASS
stba %o3, [%o1] ASI_M_CTL
b 1b
inc %o2
2: retl
nop
outhex:
/* void outhex (unsigned long port5, unsigned long port10,
* uint32_t value);
* Dumps a 32 bits hex number on serial port
*/
mov %o2, %o4
set 28, %o3
srl %o4, %o3, %o2
1: and %o2, 0xf, %o2
cmp %o2, 9
bgt 2f
nop
b 3f
add %o2, '0', %o2
2: add %o2, 'a' - 10, %o2
3: stba %o2, [%o0] ASI_M_BYPASS
stba %o2, [%o1] ASI_M_CTL
subcc %o3, 4, %o3
bge 1b
srl %o4, %o3, %o2
retl
nop
/* void dump_exception ();
*
* Dump a message when catching an exception
*/
dump_exception:
set SER_ADDR5 + 2, %o0
set SER_ADDR10 + 2, %o1
set (_BUG_message_0), %o2
call outstr
nop
call outhex
mov %g1, %o2
set (_BUG_message_1), %o2
call outstr
nop
call outhex
mov %l1, %o2
set (_BUG_message_2), %o2
call outstr
nop
call outhex
mov %l2, %o2
set (_BUG_message_3), %o2
call outstr
nop
_forever:
/* Loop forever */
b _forever ;
nop
irq_entry10:
sethi %hi(counter_regs), %l7
ld [%l7 + %lo(counter_regs)], %l7
sethi 0x10000, %l6
ld [%l7 + %l6], %g0
jmp %l1
rett %l2
irq_entry14:
sethi %hi(counter_regs), %l7
ld [%l7 + %lo(counter_regs)], %l7
ld [%l7], %g0
sethi %hi(obp_ticks), %l7
ld [%l7 + %lo(obp_ticks)], %l7
ld [%l7], %l6
add %l6, 10, %l6
st %l6, [%l7]
jmp %l1
rett %l2
/* Register window handlers */
#include "wof.S"
#include "wuf.S"
/* Data fault handler */
.data
.align 4
.global ignore_dfault
ignore_dfault:
.word 0
.text
.align 4
handle_dfault:
/* If ignore_dfault is 0, fall through to normal exception handler */
sethi %hi(ignore_dfault), %l4
ld [%l4 + %lo(ignore_dfault)], %l4
tst %l4
bz,a bug
mov %l7, %g1
/* Otherwise skip the faulting instruction and return */
jmp %l2
rett %l2 + 4
.section .rodata
_BUG_message_0:
.string "Unhandled Exception 0x"
_BUG_message_1:
.string "\r\nPC = 0x"
_BUG_message_2:
.string " NPC = 0x"
_BUG_message_3:
.string "\r\nStopping execution\r\n"