arch/frv/kernel/entry-table.S - LeafOS-Devices/android_kernel_samsung_universal7904 - Gitiles

 /* entry-table.S: main trap vector tables and exception jump table
  *
  * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  *
  */

 #include <linux/sys.h>
 #include <linux/config.h>
 #include <linux/linkage.h>
 #include <asm/spr-regs.h>

 ###############################################################################
 #
 # Declare the main trap and vector tables
 #
 # There are six tables:
 #
 # (1) The trap table for debug mode
 # (2) The trap table for kernel mode
 # (3) The trap table for user mode
 #
 #     The CPU jumps to an appropriate slot in the appropriate table to perform
 #     exception processing. We have three different tables for the three
 #     different CPU modes because there is no hardware differentiation between
 #     stack pointers for these three modes, and so we have to invent one when
 #     crossing mode boundaries.
 #
 # (4) The exception handler vector table
 #
 #     The user and kernel trap tables use the same prologue for normal
 #     exception processing. The prologue then jumps to the handler in this
 #     table, as indexed by the exception ID from the TBR.
 #
 # (5) The fixup table for kernel-trap single-step
 # (6) The fixup table for user-trap single-step
 #
 #     Due to the way single-stepping works on this CPU (single-step is not
 #     disabled when crossing exception boundaries, only when in debug mode),
 #     we have to catch the single-step event in break.S and jump to the fixup
 #     routine pointed to by this table.
 #
 # The linker script places the user mode and kernel mode trap tables on to
 # the same 8Kb page, so that break.S can be more efficient when performing
 # single-step bypass management
 #
 ###############################################################################

 	# trap table for entry from debug mode
 	.section	.trap.break,"ax"
 	.balign		256*16
 	.globl		__entry_breaktrap_table
 __entry_breaktrap_table:

 	# trap table for entry from user mode
 	.section	.trap.user,"ax"
 	.balign		256*16
 	.globl		__entry_usertrap_table
 __entry_usertrap_table:

 	# trap table for entry from kernel mode
 	.section	.trap.kernel,"ax"
 	.balign		256*16
 	.globl		__entry_kerneltrap_table
 __entry_kerneltrap_table:

 	# exception handler jump table
 	.section	.trap.vector,"ax"
 	.balign		256*4
 	.globl		__entry_vector_table
 __entry_vector_table:

 	# trap fixup table for single-stepping in user mode
 	.section	.trap.fixup.user,"a"
 	.balign		256*4
 	.globl		__break_usertrap_fixup_table
 __break_usertrap_fixup_table:

 	# trap fixup table for single-stepping in user mode
 	.section	.trap.fixup.kernel,"a"
 	.balign		256*4
 	.globl		__break_kerneltrap_fixup_table
 __break_kerneltrap_fixup_table:

 	# handler declaration for a sofware or program interrupt
 .macro VECTOR_SOFTPROG tbr_tt, vec
 	.section .trap.user
 	.org		\tbr_tt
 	bra		__entry_uspace_softprog_interrupt
 	.section .trap.fixup.user
 	.org		\tbr_tt >> 2
 	.long		__break_step_uspace_softprog_interrupt
 	.section .trap.kernel
 	.org		\tbr_tt
 	bra		__entry_kernel_softprog_interrupt
 	.section .trap.fixup.kernel
 	.org		\tbr_tt >> 2
 	.long		__break_step_kernel_softprog_interrupt
 	.section .trap.vector
 	.org		\tbr_tt >> 2
 	.long		\vec
 .endm

 	# handler declaration for a maskable external interrupt
 .macro VECTOR_IRQ tbr_tt, vec
 	.section .trap.user
 	.org		\tbr_tt
 	bra		__entry_uspace_external_interrupt
 	.section .trap.fixup.user
 	.org		\tbr_tt >> 2
 	.long		__break_step_uspace_external_interrupt
 	.section .trap.kernel
 	.org		\tbr_tt
 	bra		__entry_kernel_external_interrupt
 	.section .trap.fixup.kernel
 	.org		\tbr_tt >> 2
 	.long		__break_step_kernel_external_interrupt
 	.section .trap.vector
 	.org		\tbr_tt >> 2
 	.long		\vec
 .endm

 	# handler declaration for an NMI external interrupt
 .macro VECTOR_NMI tbr_tt, vec
 	.section .trap.user
 	.org		\tbr_tt
 	break
 	break
 	break
 	break
 	.section .trap.kernel
 	.org		\tbr_tt
 	break
 	break
 	break
 	break
 	.section .trap.vector
 	.org		\tbr_tt >> 2
 	.long		\vec
 .endm

 	# handler declaration for an MMU only sofware or program interrupt
 .macro VECTOR_SP_MMU tbr_tt, vec
 #ifdef CONFIG_MMU
  	VECTOR_SOFTPROG	\tbr_tt, \vec
 #else
 	VECTOR_NMI	\tbr_tt, 0
 #endif
 .endm


 ###############################################################################
 #
 # specification of the vectors
 # - note: each macro inserts code into multiple sections
 #
 ###############################################################################
 	VECTOR_SP_MMU	TBR_TT_INSTR_MMU_MISS,	__entry_insn_mmu_miss
 	VECTOR_SOFTPROG	TBR_TT_INSTR_ACC_ERROR,	__entry_insn_access_error
 	VECTOR_SOFTPROG	TBR_TT_INSTR_ACC_EXCEP,	__entry_insn_access_exception
 	VECTOR_SOFTPROG	TBR_TT_PRIV_INSTR,	__entry_privileged_instruction
 	VECTOR_SOFTPROG	TBR_TT_ILLEGAL_INSTR,	__entry_illegal_instruction
 	VECTOR_SOFTPROG	TBR_TT_FP_EXCEPTION,	__entry_media_exception
 	VECTOR_SOFTPROG	TBR_TT_MP_EXCEPTION,	__entry_media_exception
 	VECTOR_SOFTPROG	TBR_TT_DATA_ACC_ERROR,	__entry_data_access_error
 	VECTOR_SP_MMU	TBR_TT_DATA_MMU_MISS,	__entry_data_mmu_miss
 	VECTOR_SOFTPROG	TBR_TT_DATA_ACC_EXCEP,	__entry_data_access_exception
 	VECTOR_SOFTPROG	TBR_TT_DATA_STR_ERROR,	__entry_data_store_error
 	VECTOR_SOFTPROG	TBR_TT_DIVISION_EXCEP,	__entry_division_exception

 #ifdef CONFIG_MMU
 	.section .trap.user
 	.org		TBR_TT_INSTR_TLB_MISS
 	.globl		__trap_user_insn_tlb_miss
 __trap_user_insn_tlb_miss:
 	movsg		ear0,gr28			/* faulting address */
 	movsg		scr0,gr31			/* get mapped PTD coverage start address */
 	xor.p		gr28,gr31,gr31			/* compare addresses */
 	bra		__entry_user_insn_tlb_miss

 	.org		TBR_TT_DATA_TLB_MISS
 	.globl		__trap_user_data_tlb_miss
 __trap_user_data_tlb_miss:
 	movsg		ear0,gr28			/* faulting address */
 	movsg		scr1,gr31			/* get mapped PTD coverage start address */
 	xor.p		gr28,gr31,gr31			/* compare addresses */
 	bra		__entry_user_data_tlb_miss

 	.section .trap.kernel
 	.org		TBR_TT_INSTR_TLB_MISS
 	.globl		__trap_kernel_insn_tlb_miss
 __trap_kernel_insn_tlb_miss:
 	movsg		ear0,gr29			/* faulting address */
 	movsg		scr0,gr31			/* get mapped PTD coverage start address */
 	xor.p		gr29,gr31,gr31			/* compare addresses */
 	bra		__entry_kernel_insn_tlb_miss

 	.org		TBR_TT_DATA_TLB_MISS
 	.globl		__trap_kernel_data_tlb_miss
 __trap_kernel_data_tlb_miss:
 	movsg		ear0,gr29			/* faulting address */
 	movsg		scr1,gr31			/* get mapped PTD coverage start address */
 	xor.p		gr29,gr31,gr31			/* compare addresses */
 	bra		__entry_kernel_data_tlb_miss

 	.section .trap.fixup.user
 	.org		TBR_TT_INSTR_TLB_MISS >> 2
 	.globl		__trap_fixup_user_insn_tlb_miss
 __trap_fixup_user_insn_tlb_miss:
 	.long		__break_user_insn_tlb_miss
 	.org		TBR_TT_DATA_TLB_MISS >> 2
 	.globl		__trap_fixup_user_data_tlb_miss
 __trap_fixup_user_data_tlb_miss:
 	.long		__break_user_data_tlb_miss

 	.section .trap.fixup.kernel
 	.org		TBR_TT_INSTR_TLB_MISS >> 2
 	.globl		__trap_fixup_kernel_insn_tlb_miss
 __trap_fixup_kernel_insn_tlb_miss:
 	.long		__break_kernel_insn_tlb_miss
 	.org		TBR_TT_DATA_TLB_MISS >> 2
 	.globl		__trap_fixup_kernel_data_tlb_miss
 __trap_fixup_kernel_data_tlb_miss:
 	.long		__break_kernel_data_tlb_miss

 	.section .trap.vector
 	.org		TBR_TT_INSTR_TLB_MISS >> 2
 	.long		__entry_insn_mmu_fault
 	.org		TBR_TT_DATA_TLB_MISS >> 2
 	.long		__entry_data_mmu_fault
 #endif

 	VECTOR_SP_MMU	TBR_TT_DATA_DAT_EXCEP,	__entry_data_dat_fault
 	VECTOR_NMI	TBR_TT_DECREMENT_TIMER,	__entry_do_NMI
 	VECTOR_SOFTPROG	TBR_TT_COMPOUND_EXCEP,	__entry_compound_exception
 	VECTOR_IRQ	TBR_TT_INTERRUPT_1,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_2,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_3,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_4,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_5,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_6,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_7,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_8,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_9,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_10,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_11,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_12,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_13,	__entry_do_IRQ
 	VECTOR_IRQ	TBR_TT_INTERRUPT_14,	__entry_do_IRQ
 	VECTOR_NMI	TBR_TT_INTERRUPT_15,	__entry_do_NMI

 	# miscellaneous user mode entry points
 	.section	.trap.user
 	.org		TBR_TT_TRAP0
 	.rept		127
 	bra		__entry_uspace_softprog_interrupt
 	bra		__break_step_uspace_softprog_interrupt
 	.long		0,0
 	.endr
 	.org		TBR_TT_BREAK
 	bra		__entry_break
 	.long		0,0,0

 	# miscellaneous kernel mode entry points
 	.section	.trap.kernel
 	.org		TBR_TT_TRAP0
 	.rept		127
 	bra		__entry_kernel_softprog_interrupt
 	bra		__break_step_kernel_softprog_interrupt
 	.long		0,0
 	.endr
 	.org		TBR_TT_BREAK
 	bra		__entry_break
 	.long		0,0,0

 	# miscellaneous debug mode entry points
 	.section	.trap.break
 	.org		TBR_TT_BREAK
 	movsg		bpcsr,gr30
 	jmpl		@(gr30,gr0)

 	# miscellaneous vectors
 	.section	.trap.vector
 	.org		TBR_TT_TRAP0 >> 2
 	.long		system_call
 	.rept		126
 	.long		__entry_unsupported_trap
 	.endr
 	.org		TBR_TT_BREAK >> 2
 	.long		__entry_debug_exception
	/* entry-table.S: main trap vector tables and exception jump table
	*
	* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
	* Written by David Howells (dhowells@redhat.com)
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*
	*/

	#include <linux/sys.h>
	#include <linux/config.h>
	#include <linux/linkage.h>
	#include <asm/spr-regs.h>

	###############################################################################
	#
	# Declare the main trap and vector tables
	#
	# There are six tables:
	#
	# (1) The trap table for debug mode
	# (2) The trap table for kernel mode
	# (3) The trap table for user mode
	#
	# The CPU jumps to an appropriate slot in the appropriate table to perform
	# exception processing. We have three different tables for the three
	# different CPU modes because there is no hardware differentiation between
	# stack pointers for these three modes, and so we have to invent one when
	# crossing mode boundaries.
	#
	# (4) The exception handler vector table
	#
	# The user and kernel trap tables use the same prologue for normal
	# exception processing. The prologue then jumps to the handler in this
	# table, as indexed by the exception ID from the TBR.
	#
	# (5) The fixup table for kernel-trap single-step
	# (6) The fixup table for user-trap single-step
	#
	# Due to the way single-stepping works on this CPU (single-step is not
	# disabled when crossing exception boundaries, only when in debug mode),
	# we have to catch the single-step event in break.S and jump to the fixup
	# routine pointed to by this table.
	#
	# The linker script places the user mode and kernel mode trap tables on to
	# the same 8Kb page, so that break.S can be more efficient when performing
	# single-step bypass management
	#
	###############################################################################

	# trap table for entry from debug mode
	.section .trap.break,"ax"
	.balign 256*16
	.globl __entry_breaktrap_table
	__entry_breaktrap_table:

	# trap table for entry from user mode
	.section .trap.user,"ax"
	.balign 256*16
	.globl __entry_usertrap_table
	__entry_usertrap_table:

	# trap table for entry from kernel mode
	.section .trap.kernel,"ax"
	.balign 256*16
	.globl __entry_kerneltrap_table
	__entry_kerneltrap_table:

	# exception handler jump table
	.section .trap.vector,"ax"
	.balign 256*4
	.globl __entry_vector_table
	__entry_vector_table:

	# trap fixup table for single-stepping in user mode
	.section .trap.fixup.user,"a"
	.balign 256*4
	.globl __break_usertrap_fixup_table
	__break_usertrap_fixup_table:

	# trap fixup table for single-stepping in user mode
	.section .trap.fixup.kernel,"a"
	.balign 256*4
	.globl __break_kerneltrap_fixup_table
	__break_kerneltrap_fixup_table:

	# handler declaration for a sofware or program interrupt
	.macro VECTOR_SOFTPROG tbr_tt, vec
	.section .trap.user
	.org \tbr_tt
	bra __entry_uspace_softprog_interrupt
	.section .trap.fixup.user
	.org \tbr_tt >> 2
	.long __break_step_uspace_softprog_interrupt
	.section .trap.kernel
	.org \tbr_tt
	bra __entry_kernel_softprog_interrupt
	.section .trap.fixup.kernel
	.org \tbr_tt >> 2
	.long __break_step_kernel_softprog_interrupt
	.section .trap.vector
	.org \tbr_tt >> 2
	.long \vec
	.endm

	# handler declaration for a maskable external interrupt
	.macro VECTOR_IRQ tbr_tt, vec
	.section .trap.user
	.org \tbr_tt
	bra __entry_uspace_external_interrupt
	.section .trap.fixup.user
	.org \tbr_tt >> 2
	.long __break_step_uspace_external_interrupt
	.section .trap.kernel
	.org \tbr_tt
	bra __entry_kernel_external_interrupt
	.section .trap.fixup.kernel
	.org \tbr_tt >> 2
	.long __break_step_kernel_external_interrupt
	.section .trap.vector
	.org \tbr_tt >> 2
	.long \vec
	.endm

	# handler declaration for an NMI external interrupt
	.macro VECTOR_NMI tbr_tt, vec
	.section .trap.user
	.org \tbr_tt
	break
	break
	break
	break
	.section .trap.kernel
	.org \tbr_tt
	break
	break
	break
	break
	.section .trap.vector
	.org \tbr_tt >> 2
	.long \vec
	.endm

	# handler declaration for an MMU only sofware or program interrupt
	.macro VECTOR_SP_MMU tbr_tt, vec
	#ifdef CONFIG_MMU
	VECTOR_SOFTPROG \tbr_tt, \vec
	#else
	VECTOR_NMI \tbr_tt, 0
	#endif
	.endm


	###############################################################################
	#
	# specification of the vectors
	# - note: each macro inserts code into multiple sections
	#
	###############################################################################
	VECTOR_SP_MMU TBR_TT_INSTR_MMU_MISS, __entry_insn_mmu_miss
	VECTOR_SOFTPROG TBR_TT_INSTR_ACC_ERROR, __entry_insn_access_error
	VECTOR_SOFTPROG TBR_TT_INSTR_ACC_EXCEP, __entry_insn_access_exception
	VECTOR_SOFTPROG TBR_TT_PRIV_INSTR, __entry_privileged_instruction
	VECTOR_SOFTPROG TBR_TT_ILLEGAL_INSTR, __entry_illegal_instruction
	VECTOR_SOFTPROG TBR_TT_FP_EXCEPTION, __entry_media_exception
	VECTOR_SOFTPROG TBR_TT_MP_EXCEPTION, __entry_media_exception
	VECTOR_SOFTPROG TBR_TT_DATA_ACC_ERROR, __entry_data_access_error
	VECTOR_SP_MMU TBR_TT_DATA_MMU_MISS, __entry_data_mmu_miss
	VECTOR_SOFTPROG TBR_TT_DATA_ACC_EXCEP, __entry_data_access_exception
	VECTOR_SOFTPROG TBR_TT_DATA_STR_ERROR, __entry_data_store_error
	VECTOR_SOFTPROG TBR_TT_DIVISION_EXCEP, __entry_division_exception

	#ifdef CONFIG_MMU
	.section .trap.user
	.org TBR_TT_INSTR_TLB_MISS
	.globl __trap_user_insn_tlb_miss
	__trap_user_insn_tlb_miss:
	movsg ear0,gr28 /* faulting address */
	movsg scr0,gr31 /* get mapped PTD coverage start address */
	xor.p gr28,gr31,gr31 /* compare addresses */
	bra __entry_user_insn_tlb_miss

	.org TBR_TT_DATA_TLB_MISS
	.globl __trap_user_data_tlb_miss
	__trap_user_data_tlb_miss:
	movsg ear0,gr28 /* faulting address */
	movsg scr1,gr31 /* get mapped PTD coverage start address */
	xor.p gr28,gr31,gr31 /* compare addresses */
	bra __entry_user_data_tlb_miss

	.section .trap.kernel
	.org TBR_TT_INSTR_TLB_MISS
	.globl __trap_kernel_insn_tlb_miss
	__trap_kernel_insn_tlb_miss:
	movsg ear0,gr29 /* faulting address */
	movsg scr0,gr31 /* get mapped PTD coverage start address */
	xor.p gr29,gr31,gr31 /* compare addresses */
	bra __entry_kernel_insn_tlb_miss

	.org TBR_TT_DATA_TLB_MISS
	.globl __trap_kernel_data_tlb_miss
	__trap_kernel_data_tlb_miss:
	movsg ear0,gr29 /* faulting address */
	movsg scr1,gr31 /* get mapped PTD coverage start address */
	xor.p gr29,gr31,gr31 /* compare addresses */
	bra __entry_kernel_data_tlb_miss

	.section .trap.fixup.user
	.org TBR_TT_INSTR_TLB_MISS >> 2
	.globl __trap_fixup_user_insn_tlb_miss
	__trap_fixup_user_insn_tlb_miss:
	.long __break_user_insn_tlb_miss
	.org TBR_TT_DATA_TLB_MISS >> 2
	.globl __trap_fixup_user_data_tlb_miss
	__trap_fixup_user_data_tlb_miss:
	.long __break_user_data_tlb_miss

	.section .trap.fixup.kernel
	.org TBR_TT_INSTR_TLB_MISS >> 2
	.globl __trap_fixup_kernel_insn_tlb_miss
	__trap_fixup_kernel_insn_tlb_miss:
	.long __break_kernel_insn_tlb_miss
	.org TBR_TT_DATA_TLB_MISS >> 2
	.globl __trap_fixup_kernel_data_tlb_miss
	__trap_fixup_kernel_data_tlb_miss:
	.long __break_kernel_data_tlb_miss

	.section .trap.vector
	.org TBR_TT_INSTR_TLB_MISS >> 2
	.long __entry_insn_mmu_fault
	.org TBR_TT_DATA_TLB_MISS >> 2
	.long __entry_data_mmu_fault
	#endif

	VECTOR_SP_MMU TBR_TT_DATA_DAT_EXCEP, __entry_data_dat_fault
	VECTOR_NMI TBR_TT_DECREMENT_TIMER, __entry_do_NMI
	VECTOR_SOFTPROG TBR_TT_COMPOUND_EXCEP, __entry_compound_exception
	VECTOR_IRQ TBR_TT_INTERRUPT_1, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_2, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_3, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_4, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_5, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_6, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_7, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_8, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_9, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_10, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_11, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_12, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_13, __entry_do_IRQ
	VECTOR_IRQ TBR_TT_INTERRUPT_14, __entry_do_IRQ
	VECTOR_NMI TBR_TT_INTERRUPT_15, __entry_do_NMI

	# miscellaneous user mode entry points
	.section .trap.user
	.org TBR_TT_TRAP0
	.rept 127
	bra __entry_uspace_softprog_interrupt
	bra __break_step_uspace_softprog_interrupt
	.long 0,0
	.endr
	.org TBR_TT_BREAK
	bra __entry_break
	.long 0,0,0

	# miscellaneous kernel mode entry points
	.section .trap.kernel
	.org TBR_TT_TRAP0
	.rept 127
	bra __entry_kernel_softprog_interrupt
	bra __break_step_kernel_softprog_interrupt
	.long 0,0
	.endr
	.org TBR_TT_BREAK
	bra __entry_break
	.long 0,0,0

	# miscellaneous debug mode entry points
	.section .trap.break
	.org TBR_TT_BREAK
	movsg bpcsr,gr30
	jmpl @(gr30,gr0)

	# miscellaneous vectors
	.section .trap.vector
	.org TBR_TT_TRAP0 >> 2
	.long system_call
	.rept 126
	.long __entry_unsupported_trap
	.endr
	.org TBR_TT_BREAK >> 2
	.long __entry_debug_exception