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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
* Copyright (C) 2002, 2007 Maciej W. Rozycki
*/
#include <linux/init.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/cacheops.h>
#include <asm/irqflags.h>
#include <asm/regdef.h>
#include <asm/rlxregs.h>
#include <asm/stackframe.h>
#include <asm/page.h>
#include <asm/thread_info.h>
#define PANIC_PIC(msg) \
.set push; \
.set reorder; \
PTR_LA a0,8f; \
.set noat; \
PTR_LA AT, panic; \
jr AT; \
9: b 9b; \
.set pop; \
TEXT(msg)
__INIT
/*
* rlx_trap_dispatch: exception vector for all RLX CPUs
*
* Be careful when changing this, it has to be at most 128 bytes
* to fit into space reserved for the exception handler.
*/
NESTED(rlx_trap_dispatch, 0, sp)
.set push
.set noat
mfc0 k1, CP0_CAUSE
andi k1, k1, 0x7c
PTR_L k0, exception_handlers(k1)
jr k0
.set pop
END(rlx_trap_dispatch)
__FINIT
.align 5
NESTED(rlx_irq_dispatch, PT_SIZE, sp)
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* Check to see if the interrupted code has just disabled
* interrupts and ignore this interrupt for now if so.
*
* local_irq_disable() disables interrupts and then calls
* trace_hardirqs_off() to track the state. If an interrupt is taken
* after interrupts are disabled but before the state is updated
* it will appear to restore_all that it is incorrectly returning with
* interrupts disabled
*/
.set push
.set noat
mfc0 k0, CP0_STATUS
and k0, ST0_IEP
bnez k0, 1f
mfc0 k0, CP0_EPC
.set noreorder
j k0
rfe
1:
.set pop
#endif
SAVE_ALL
CLI
TRACE_IRQS_OFF
LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
PTR_LA ra, ret_from_irq
j bsp_irq_dispatch
END(rlx_irq_dispatch)
.align 6
NESTED(rlx_vec_dispatch, PT_SIZE, sp)
.set push
.set noreorder
b 0f
nop
b 1f
nop
b 2f
nop
b 3f
nop
b 4f
nop
b 5f
nop
b 6f
nop
b 7f
nop
0: SAVE_SP
b 9f
li k1, 0
1: SAVE_SP
b 9f
li k1, 1
2: SAVE_SP
b 9f
li k1, 2
3: SAVE_SP
b 9f
li k1, 3
4: SAVE_SP
b 9f
li k1, 4
5: SAVE_SP
b 9f
li k1, 5
6: SAVE_SP
b 9f
li k1, 6
7: SAVE_SP
li k1, 7
.set pop
9: SAVE_ALL_BUT_SP
CLI
TRACE_IRQS_OFF
LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
PTR_LA ra, ret_from_irq
move a0, k1
j rlx_do_lopi_IRQ
END(rlx_vec_dispatch)
.macro __build_clear_none
.endm
.macro __build_clear_sti
TRACE_IRQS_ON
STI
.endm
.macro __build_clear_cli
CLI
TRACE_IRQS_OFF
.endm
.macro __build_clear_ade
MFC0 t0, CP0_BADVADDR
PTR_S t0, PT_BVADDR(sp)
KMODE
.endm
.macro __BUILD_silent exception
.endm
/* Gas tries to parse the PRINT argument as a string containing
string escapes and emits bogus warnings if it believes to
recognize an unknown escape code. So make the arguments
start with an n and gas will believe \n is ok ... */
.macro __BUILD_verbose nexception
LONG_L a1, PT_EPC(sp)
PRINT("Got \nexception at %08lx\012")
.endm
.macro __BUILD_count exception
LONG_L t0,exception_count_\exception
LONG_ADDIU t0, 1
LONG_S t0,exception_count_\exception
.comm exception_count\exception, 8, 8
.endm
.macro __BUILD_HANDLER exception handler clear verbose ext
.align 5
NESTED(handle_\exception, PT_SIZE, sp)
.set noat
SAVE_ALL
FEXPORT(handle_\exception\ext)
__BUILD_clear_\clear
.set at
__BUILD_\verbose \exception
move a0, sp
PTR_LA ra, ret_from_exception
j do_\handler
END(handle_\exception)
.endm
.macro BUILD_HANDLER exception handler clear verbose
__BUILD_HANDLER \exception \handler \clear \verbose _int
.endm
BUILD_HANDLER adel ade ade silent /* #4 */
BUILD_HANDLER ades ade ade silent /* #5 */
BUILD_HANDLER bp bp sti silent /* #9 */
BUILD_HANDLER ri ri sti silent /* #10 */
BUILD_HANDLER cpu cpu sti silent /* #11 */
BUILD_HANDLER ov ov sti silent /* #12 */
BUILD_HANDLER reserved reserved sti verbose /* others */
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