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[ARM] nommu: add ARM7TDMI core support

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

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Hyok S. Choi 2006-09-26 17:37:36 +09:00 committed by Russell King
parent f12d0d7c77
commit 07e0da78ab
6 changed files with 273 additions and 1 deletions
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1
arch/arm/Makefile
View File

@ -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

13
arch/arm/mm/Kconfig
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@ -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

1
arch/arm/mm/Makefile
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@ -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

249
arch/arm/mm/proc-arm7tdmi.S Normal file
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@ -0,0 +1,249 @@
/*
* 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

2
include/asm-arm/cacheflush.h
View File

@ -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

8
include/asm-arm/proc-fns.h
View File

@ -33,6 +33,14 @@
# define CPU_NAME cpu_arm6
# endif
# endif
# ifdef CONFIG_CPU_ARM7TDMI
# ifdef CPU_NAME
# undef MULTI_CPU
# define MULTI_CPU
# else
# define CPU_NAME cpu_arm7tdmi
# endif
# endif
# ifdef CONFIG_CPU_ARM710
# ifdef CPU_NAME
# undef MULTI_CPU