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Commit 07e0da78 authored by Hyok S. Choi's avatar Hyok S. Choi Committed by Russell King
Browse files

[ARM] nommu: add ARM7TDMI core support 



This patch adds ARM7TDMI core support which has no cache and no CP15
register(no memory control unit).

Signed-off-by: default avatarHyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent f12d0d7c

arch/arm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ arch-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3 -march=armv3 
# This selects how we optimise for the processor.

tune-$(CONFIG_CPU_ARM610)	:=-mtune=arm610

tune-$(CONFIG_CPU_ARM710)	:=-mtune=arm710

tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi

tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi

tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi

tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi

arch/arm/mm/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -25,6 +25,19 @@ config CPU_ARM610 
	  Say Y if you want support for the ARM610 processor.

	  Otherwise, say N.



# ARM7TDMI

config CPU_ARM7TDMI

	bool "Support ARM7TDMI processor"

	select CPU_32v4T

	select CPU_ABRT_LV4T

	select CPU_CACHE_V4

	help

	  A 32-bit RISC microprocessor based on the ARM7 processor core

	  which has no memory control unit and cache.



	  Say Y if you want support for the ARM7TDMI processor.

	  Otherwise, say N.



# ARM710

config CPU_ARM710

	bool "Support ARM710 processor" if !ARCH_CLPS7500 && ARCH_RPC

arch/arm/mm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ obj-$(CONFIG_CPU_TLB_V6) += tlb-v6.o 


obj-$(CONFIG_CPU_ARM610)	+= proc-arm6_7.o

obj-$(CONFIG_CPU_ARM710)	+= proc-arm6_7.o

obj-$(CONFIG_CPU_ARM7TDMI)	+= proc-arm7tdmi.o

obj-$(CONFIG_CPU_ARM720T)	+= proc-arm720.o

obj-$(CONFIG_CPU_ARM920T)	+= proc-arm920.o

obj-$(CONFIG_CPU_ARM922T)	+= proc-arm922.o

arch/arm/mm/proc-arm7tdmi.S

0 → 100644
+249 −0
Original line number Diff line number Diff line 
/*

 *  linux/arch/arm/mm/proc-arm7tdmi.S: utility functions for ARM7TDMI

 *

 *  Copyright (C) 2003-2006 Hyok S. Choi <hyok.choi@samsung.com>

 *

 * 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.

 *

 */

#include <linux/linkage.h>

#include <linux/init.h>

#include <asm/assembler.h>

#include <asm/asm-offsets.h>

#include <asm/pgtable-hwdef.h>

#include <asm/pgtable.h>

#include <asm/procinfo.h>

#include <asm/ptrace.h>



	.text

/*

 * cpu_arm7tdmi_proc_init()

 * cpu_arm7tdmi_do_idle()

 * cpu_arm7tdmi_dcache_clean_area()

 * cpu_arm7tdmi_switch_mm()

 *

 * These are not required.

 */

ENTRY(cpu_arm7tdmi_proc_init)

ENTRY(cpu_arm7tdmi_do_idle)

ENTRY(cpu_arm7tdmi_dcache_clean_area)

ENTRY(cpu_arm7tdmi_switch_mm)

		mov	pc, lr



/*

 * cpu_arm7tdmi_proc_fin()

 */

ENTRY(cpu_arm7tdmi_proc_fin)

		mov	r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE

		msr	cpsr_c, r0

		mov	pc, lr



/*

 * Function: cpu_arm7tdmi_reset(loc)

 * Params  : loc(r0)	address to jump to

 * Purpose : Sets up everything for a reset and jump to the location for soft reset.

 */

ENTRY(cpu_arm7tdmi_reset)

		mov	pc, r0



		__INIT



		.type	__arm7tdmi_setup, #function

__arm7tdmi_setup:

		mov	pc, lr

		.size	__arm7tdmi_setup, . - __arm7tdmi_setup



		__INITDATA



/*

 * Purpose : Function pointers used to access above functions - all calls

 *	     come through these

 */

		.type	arm7tdmi_processor_functions, #object

ENTRY(arm7tdmi_processor_functions)

		.word	v4t_late_abort

		.word	cpu_arm7tdmi_proc_init

		.word	cpu_arm7tdmi_proc_fin

		.word	cpu_arm7tdmi_reset

		.word	cpu_arm7tdmi_do_idle

		.word	cpu_arm7tdmi_dcache_clean_area

		.word	cpu_arm7tdmi_switch_mm

		.word	0		@ cpu_*_set_pte

		.size	arm7tdmi_processor_functions, . - arm7tdmi_processor_functions



		.section ".rodata"



		.type	cpu_arch_name, #object

cpu_arch_name:

		.asciz	"armv4t"

		.size	cpu_arch_name, . - cpu_arch_name



		.type	cpu_elf_name, #object

cpu_elf_name:

		.asciz	"v4"

		.size	cpu_elf_name, . - cpu_elf_name



		.type	cpu_arm7tdmi_name, #object

cpu_arm7tdmi_name:

		.asciz	"ARM7TDMI"

		.size	cpu_arm7tdmi_name, . - cpu_arm7tdmi_name



		.type	cpu_triscenda7_name, #object

cpu_triscenda7_name:

		.asciz	"Triscend-A7x"

		.size	cpu_triscenda7_name, . - cpu_triscenda7_name



		.type	cpu_at91_name, #object

cpu_at91_name:

		.asciz	"Atmel-AT91M40xxx"

		.size	cpu_at91_name, . - cpu_at91_name



		.type	cpu_s3c3410_name, #object

cpu_s3c3410_name:

		.asciz	"Samsung-S3C3410"

		.size	cpu_s3c3410_name, . - cpu_s3c3410_name



		.type	cpu_s3c44b0x_name, #object

cpu_s3c44b0x_name:

		.asciz	"Samsung-S3C44B0x"

		.size	cpu_s3c44b0x_name, . - cpu_s3c44b0x_name



		.type	cpu_s3c4510b, #object

cpu_s3c4510b_name:

		.asciz	"Samsung-S3C4510B"

		.size	cpu_s3c4510b_name, . - cpu_s3c4510b_name



		.type	cpu_s3c4530_name, #object

cpu_s3c4530_name:

		.asciz	"Samsung-S3C4530"

		.size	cpu_s3c4530_name, . - cpu_s3c4530_name



		.type	cpu_netarm_name, #object

cpu_netarm_name:

		.asciz	"NETARM"

		.size	cpu_netarm_name, . - cpu_netarm_name



		.align



		.section ".proc.info.init", #alloc, #execinstr



		.type	__arm7tdmi_proc_info, #object

__arm7tdmi_proc_info:

		.long	0x41007700

		.long	0xfff8ff00

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_26BIT

		.long	cpu_arm7tdmi_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__arm7tdmi_proc_info, . - __arm7dmi_proc_info



		.type	__triscenda7_proc_info, #object

__triscenda7_proc_info:

		.long	0x0001d2ff

		.long	0x0001ffff

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_triscenda7_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__triscenda7_proc_info, . - __triscenda7_proc_info



		.type	__at91_proc_info, #object

__at91_proc_info:

		.long	0x14000040

		.long	0xfff000e0

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_at91_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__at91_proc_info, . - __at91_proc_info



		.type	__s3c4510b_proc_info, #object

__s3c4510b_proc_info:

		.long	0x36365000

		.long	0xfffff000

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_s3c4510b_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__s3c4510b_proc_info, . - __s3c4510b_proc_info



		.type	__s3c4530_proc_info, #object

__s3c4530_proc_info:

		.long	0x4c000000

		.long	0xfff000e0

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_s3c4530_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__s3c4530_proc_info, . - __s3c4530_proc_info



		.type	__s3c3410_proc_info, #object

__s3c3410_proc_info:

		.long	0x34100000

		.long	0xffff0000

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_s3c3410_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__s3c3410_proc_info, . - __s3c3410_proc_info



		.type	__s3c44b0x_proc_info, #object

__s3c44b0x_proc_info:

		.long	0x44b00000

		.long	0xffff0000

		.long	0

		.long	0

		b	__arm7tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_s3c44b0x_name

		.long	arm7tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__s3c44b0x_proc_info, . - __s3c44b0x_proc_info

include/asm-arm/cacheflush.h

+1 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ 
# endif

#endif



#if defined(CONFIG_CPU_ARM720T)

#if defined(CONFIG_CPU_ARM720T) || defined(CONFIG_CPU_ARM7TDMI)

# ifdef _CACHE

#  define MULTI_CACHE 1

# else