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Commit 43f5f014 authored by Hyok S. Choi's avatar Hyok S. Choi Committed by Russell King
Browse files

[ARM] nommu: add ARM9TDMI core support 



This patch adds ARM9TDMI 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 b731c311

arch/arm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ tune-$(CONFIG_CPU_ARM710) :=-mtune=arm710 
tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi

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

tune-$(CONFIG_CPU_ARM740T)	:=-mtune=arm7tdmi

tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi

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

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

tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi

arch/arm/mm/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -90,6 +90,19 @@ config CPU_ARM740T 
	  Say Y if you want support for the ARM740T processor.

	  Otherwise, say N.



# ARM9TDMI

config CPU_ARM9TDMI

	bool "Support ARM9TDMI processor"

	select CPU_32v4T

	select CPU_ABRT_EV4T

	select CPU_CACHE_V4

	help

	  A 32-bit RISC microprocessor based on the ARM9 processor core

	  which has no memory control unit and cache.



	  Say Y if you want support for the ARM9TDMI processor.

	  Otherwise, say N.



# ARM920T

config CPU_ARM920T

	bool "Support ARM920T processor"

arch/arm/mm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ 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_ARM740T)	+= proc-arm740.o

obj-$(CONFIG_CPU_ARM9TDMI)	+= proc-arm9tdmi.o

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

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

obj-$(CONFIG_CPU_ARM925T)	+= proc-arm925.o

arch/arm/mm/proc-arm9tdmi.S

0 → 100644
+134 −0
Original line number Diff line number Diff line 
/*

 *  linux/arch/arm/mm/proc-arm9tdmi.S: utility functions for ARM9TDMI

 *

 *  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_arm9tdmi_proc_init()

 * cpu_arm9tdmi_do_idle()

 * cpu_arm9tdmi_dcache_clean_area()

 * cpu_arm9tdmi_switch_mm()

 *

 * These are not required.

 */

ENTRY(cpu_arm9tdmi_proc_init)

ENTRY(cpu_arm9tdmi_do_idle)

ENTRY(cpu_arm9tdmi_dcache_clean_area)

ENTRY(cpu_arm9tdmi_switch_mm)

		mov	pc, lr



/*

 * cpu_arm9tdmi_proc_fin()

 */

ENTRY(cpu_arm9tdmi_proc_fin)

		mov	r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE

		msr	cpsr_c, r0

		mov	pc, lr



/*

 * Function: cpu_arm9tdmi_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_arm9tdmi_reset)

		mov	pc, r0



		__INIT



		.type	__arm9tdmi_setup, #function

__arm9tdmi_setup:

		mov	pc, lr

		.size	__arm9tdmi_setup, . - __arm9tdmi_setup



		__INITDATA



/*

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

 *	     come through these

 */

		.type	arm9tdmi_processor_functions, #object

ENTRY(arm9tdmi_processor_functions)

		.word	v4t_early_abort

		.word	cpu_arm9tdmi_proc_init

		.word	cpu_arm9tdmi_proc_fin

		.word	cpu_arm9tdmi_reset

		.word	cpu_arm9tdmi_do_idle

		.word	cpu_arm9tdmi_dcache_clean_area

		.word	cpu_arm9tdmi_switch_mm

		.word	0		@ cpu_*_set_pte

		.size	arm9tdmi_processor_functions, . - arm9tdmi_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_arm9tdmi_name, #object

cpu_arm9tdmi_name:

		.asciz	"ARM9TDMI"

		.size	cpu_arm9tdmi_name, . - cpu_arm9tdmi_name



		.type	cpu_p2001_name, #object

cpu_p2001_name:

		.asciz	"P2001"

		.size	cpu_p2001_name, . - cpu_p2001_name



		.align



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



		.type	__arm9tdmi_proc_info, #object

__arm9tdmi_proc_info:

		.long	0x41009900

		.long	0xfff8ff00

		.long	0

		.long	0

		b	__arm9tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_arm9tdmi_name

		.long	arm9tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__arm9tdmi_proc_info, . - __arm9dmi_proc_info



		.type	__p2001_proc_info, #object

__p2001_proc_info:

		.long	0x41029000

		.long	0xffffffff

		.long	0

		.long	0

		b	__arm9tdmi_setup

		.long	cpu_arch_name

		.long	cpu_elf_name

		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT

		.long	cpu_p2001_name

		.long	arm9tdmi_processor_functions

		.long	0

		.long	0

		.long	v4_cache_fns

		.size	__p2001_proc_info, . - __p2001_proc_info

include/asm-arm/cacheflush.h

+2 −1
Original line number Diff line number Diff line
@@ -34,7 +34,8 @@ 
# endif

#endif



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

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

    defined(CONFIG_CPU_ARM9TDMI)

# ifdef _CACHE

#  define MULTI_CACHE 1

# else