ivt.s

优龙2410linux2.6.8内核源代码

	shl r18=r18,43			// put sign bit in position (43=64-21)
	;;

	mov r16=cr.ipsr
	shr r18=r18,39			// sign extend (39=43-4)
	;;

	add r17=r17,r18			// now add the offset
	;;
	mov cr.iip=r17
	dep r16=0,r16,41,2		// clear EI
	;;

	mov cr.ipsr=r16
	;;

	rfi				// and go back
END(speculation_vector)

	.org ia64_ivt+0x5800
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5800 Entry 28 (size 16 bundles) Reserved
	DBG_FAULT(28)
	FAULT(28)

	.org ia64_ivt+0x5900
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5900 Entry 29 (size 16 bundles) Debug (16,28,56)
ENTRY(debug_vector)
	DBG_FAULT(29)
	FAULT(29)
END(debug_vector)

	.org ia64_ivt+0x5a00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5a00 Entry 30 (size 16 bundles) Unaligned Reference (57)
ENTRY(unaligned_access)
	DBG_FAULT(30)
	mov r16=cr.ipsr
	mov r31=pr		// prepare to save predicates
	;;
	br.sptk.many dispatch_unaligned_handler
END(unaligned_access)

	.org ia64_ivt+0x5b00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5b00 Entry 31 (size 16 bundles) Unsupported Data Reference (57)
ENTRY(unsupported_data_reference)
	DBG_FAULT(31)
	FAULT(31)
END(unsupported_data_reference)

	.org ia64_ivt+0x5c00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5c00 Entry 32 (size 16 bundles) Floating-Point Fault (64)
ENTRY(floating_point_fault)
	DBG_FAULT(32)
	FAULT(32)
END(floating_point_fault)

	.org ia64_ivt+0x5d00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5d00 Entry 33 (size 16 bundles) Floating Point Trap (66)
ENTRY(floating_point_trap)
	DBG_FAULT(33)
	FAULT(33)
END(floating_point_trap)

	.org ia64_ivt+0x5e00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5e00 Entry 34 (size 16 bundles) Lower Privilege Transfer Trap (66)
ENTRY(lower_privilege_trap)
	DBG_FAULT(34)
	FAULT(34)
END(lower_privilege_trap)

	.org ia64_ivt+0x5f00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x5f00 Entry 35 (size 16 bundles) Taken Branch Trap (68)
ENTRY(taken_branch_trap)
	DBG_FAULT(35)
	FAULT(35)
END(taken_branch_trap)

	.org ia64_ivt+0x6000
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6000 Entry 36 (size 16 bundles) Single Step Trap (69)
ENTRY(single_step_trap)
	DBG_FAULT(36)
	FAULT(36)
END(single_step_trap)

	.org ia64_ivt+0x6100
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6100 Entry 37 (size 16 bundles) Reserved
	DBG_FAULT(37)
	FAULT(37)

	.org ia64_ivt+0x6200
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6200 Entry 38 (size 16 bundles) Reserved
	DBG_FAULT(38)
	FAULT(38)

	.org ia64_ivt+0x6300
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6300 Entry 39 (size 16 bundles) Reserved
	DBG_FAULT(39)
	FAULT(39)

	.org ia64_ivt+0x6400
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6400 Entry 40 (size 16 bundles) Reserved
	DBG_FAULT(40)
	FAULT(40)

	.org ia64_ivt+0x6500
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6500 Entry 41 (size 16 bundles) Reserved
	DBG_FAULT(41)
	FAULT(41)

	.org ia64_ivt+0x6600
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6600 Entry 42 (size 16 bundles) Reserved
	DBG_FAULT(42)
	FAULT(42)

	.org ia64_ivt+0x6700
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6700 Entry 43 (size 16 bundles) Reserved
	DBG_FAULT(43)
	FAULT(43)

	.org ia64_ivt+0x6800
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6800 Entry 44 (size 16 bundles) Reserved
	DBG_FAULT(44)
	FAULT(44)

	.org ia64_ivt+0x6900
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6900 Entry 45 (size 16 bundles) IA-32 Exeception (17,18,29,41,42,43,44,58,60,61,62,72,73,75,76,77)
ENTRY(ia32_exception)
	DBG_FAULT(45)
	FAULT(45)
END(ia32_exception)

	.org ia64_ivt+0x6a00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6a00 Entry 46 (size 16 bundles) IA-32 Intercept  (30,31,59,70,71)
ENTRY(ia32_intercept)
	DBG_FAULT(46)
#ifdef	CONFIG_IA32_SUPPORT
	mov r31=pr
	mov r16=cr.isr
	;;
	extr.u r17=r16,16,8	// get ISR.code
	mov r18=ar.eflag
	mov r19=cr.iim		// old eflag value
	;;
	cmp.ne p6,p0=2,r17
(p6)	br.cond.spnt 1f		// not a system flag fault
	xor r16=r18,r19
	;;
	extr.u r17=r16,18,1	// get the eflags.ac bit
	;;
	cmp.eq p6,p0=0,r17
(p6)	br.cond.spnt 1f		// eflags.ac bit didn't change
	;;
	mov pr=r31,-1		// restore predicate registers
	rfi

1:
#endif	// CONFIG_IA32_SUPPORT
	FAULT(46)
END(ia32_intercept)

	.org ia64_ivt+0x6b00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6b00 Entry 47 (size 16 bundles) IA-32 Interrupt  (74)
ENTRY(ia32_interrupt)
	DBG_FAULT(47)
#ifdef CONFIG_IA32_SUPPORT
	mov r31=pr
	br.sptk.many dispatch_to_ia32_handler
#else
	FAULT(47)
#endif
END(ia32_interrupt)

	.org ia64_ivt+0x6c00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6c00 Entry 48 (size 16 bundles) Reserved
	DBG_FAULT(48)
	FAULT(48)

	.org ia64_ivt+0x6d00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6d00 Entry 49 (size 16 bundles) Reserved
	DBG_FAULT(49)
	FAULT(49)

	.org ia64_ivt+0x6e00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6e00 Entry 50 (size 16 bundles) Reserved
	DBG_FAULT(50)
	FAULT(50)

	.org ia64_ivt+0x6f00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x6f00 Entry 51 (size 16 bundles) Reserved
	DBG_FAULT(51)
	FAULT(51)

	.org ia64_ivt+0x7000
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7000 Entry 52 (size 16 bundles) Reserved
	DBG_FAULT(52)
	FAULT(52)

	.org ia64_ivt+0x7100
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7100 Entry 53 (size 16 bundles) Reserved
	DBG_FAULT(53)
	FAULT(53)

	.org ia64_ivt+0x7200
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7200 Entry 54 (size 16 bundles) Reserved
	DBG_FAULT(54)
	FAULT(54)

	.org ia64_ivt+0x7300
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7300 Entry 55 (size 16 bundles) Reserved
	DBG_FAULT(55)
	FAULT(55)

	.org ia64_ivt+0x7400
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7400 Entry 56 (size 16 bundles) Reserved
	DBG_FAULT(56)
	FAULT(56)

	.org ia64_ivt+0x7500
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7500 Entry 57 (size 16 bundles) Reserved
	DBG_FAULT(57)
	FAULT(57)

	.org ia64_ivt+0x7600
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7600 Entry 58 (size 16 bundles) Reserved
	DBG_FAULT(58)
	FAULT(58)

	.org ia64_ivt+0x7700
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7700 Entry 59 (size 16 bundles) Reserved
	DBG_FAULT(59)
	FAULT(59)

	.org ia64_ivt+0x7800
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7800 Entry 60 (size 16 bundles) Reserved
	DBG_FAULT(60)
	FAULT(60)

	.org ia64_ivt+0x7900
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7900 Entry 61 (size 16 bundles) Reserved
	DBG_FAULT(61)
	FAULT(61)

	.org ia64_ivt+0x7a00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7a00 Entry 62 (size 16 bundles) Reserved
	DBG_FAULT(62)
	FAULT(62)

	.org ia64_ivt+0x7b00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7b00 Entry 63 (size 16 bundles) Reserved
	DBG_FAULT(63)
	FAULT(63)

	.org ia64_ivt+0x7c00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7c00 Entry 64 (size 16 bundles) Reserved
	DBG_FAULT(64)
	FAULT(64)

	.org ia64_ivt+0x7d00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7d00 Entry 65 (size 16 bundles) Reserved
	DBG_FAULT(65)
	FAULT(65)

	.org ia64_ivt+0x7e00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7e00 Entry 66 (size 16 bundles) Reserved
	DBG_FAULT(66)
	FAULT(66)

	.org ia64_ivt+0x7f00
/////////////////////////////////////////////////////////////////////////////////////////
// 0x7f00 Entry 67 (size 16 bundles) Reserved
	DBG_FAULT(67)
	FAULT(67)

#ifdef CONFIG_IA32_SUPPORT

	/*
	 * There is no particular reason for this code to be here, other than that
	 * there happens to be space here that would go unused otherwise.  If this
	 * fault ever gets "unreserved", simply moved the following code to a more
	 * suitable spot...
	 */

	// IA32 interrupt entry point

ENTRY(dispatch_to_ia32_handler)
	SAVE_MIN
	;;
	mov r14=cr.isr
	ssm psr.ic | PSR_DEFAULT_BITS
	;;
	srlz.i					// guarantee that interruption collection is on
	;;
(p15)	ssm psr.i
	adds r3=8,r2		// Base pointer for SAVE_REST
	;;
	SAVE_REST
	;;
	mov r15=0x80
	shr r14=r14,16		// Get interrupt number
	;;
	cmp.ne p6,p0=r14,r15
(p6)	br.call.dpnt.many b6=non_ia32_syscall

	adds r14=IA64_PT_REGS_R8_OFFSET + 16,sp	// 16 byte hole per SW conventions
	adds r15=IA64_PT_REGS_R1_OFFSET + 16,sp
	;;
	cmp.eq pSys,pNonSys=r0,r0 // set pSys=1, pNonSys=0
	ld8 r8=[r14]		// get r8
	;;
	st8 [r15]=r8		// save original EAX in r1 (IA32 procs don't use the GP)
	;;
	alloc r15=ar.pfs,0,0,6,0	// must first in an insn group
	;;
	ld4 r8=[r14],8		// r8 == eax (syscall number)
	mov r15=IA32_NR_syscalls
	;;
	cmp.ltu.unc p6,p7=r8,r15
	ld4 out1=[r14],8	// r9 == ecx
	;;
	ld4 out2=[r14],8	// r10 == edx
	;;
	ld4 out0=[r14]		// r11 == ebx
	adds r14=(IA64_PT_REGS_R13_OFFSET) + 16,sp
	;;
	ld4 out5=[r14],PT(R14)-PT(R13)	// r13 == ebp
	;;
	ld4 out3=[r14],PT(R15)-PT(R14)	// r14 == esi
	adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
	;;
	ld4 out4=[r14]		// r15 == edi
	movl r16=ia32_syscall_table
	;;
(p6)	shladd r16=r8,3,r16	// force ni_syscall if not valid syscall number
	ld4 r2=[r2]		// r2 = current_thread_info()->flags
	;;
	ld8 r16=[r16]
	and r2=_TIF_SYSCALL_TRACEAUDIT,r2	// mask trace or audit
	;;
	mov b6=r16
	movl r15=ia32_ret_from_syscall
	cmp.eq p8,p0=r2,r0
	;;
	mov rp=r15
(p8)	br.call.sptk.many b6=b6
	br.cond.sptk ia32_trace_syscall

non_ia32_syscall:
	alloc r15=ar.pfs,0,0,2,0
	mov out0=r14				// interrupt #
	add out1=16,sp				// pointer to pt_regs
	;;			// avoid WAW on CFM
	br.call.sptk.many rp=ia32_bad_interrupt
.ret1:	movl r15=ia64_leave_kernel
	;;
	mov rp=r15
	br.ret.sptk.many rp
END(dispatch_to_ia32_handler)

#endif /* CONFIG_IA32_SUPPORT */