[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: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 8ec4b46..a29e641 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -58,6 +58,7 @@
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-$(CONFIG_CPU_ARM925T) :=-mtune=arm9tdmi
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 87f9fec..ed9d32c 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -90,6 +90,19 @@
Say Y if you want support for the ARM740T processor.
Otherwise, say N.
+# ARM9TDMI
+config CPU_ARM9TDMI
+ bool "Support ARM9TDMI processor"
+ select CPU_32v4T
+ select CPU_ABRT_EV4T
+ select CPU_CACHE_V4
+ help
+ A 32-bit RISC microprocessor based on the ARM9 processor core
+ which has no memory control unit and cache.
+
+ Say Y if you want support for the ARM9TDMI processor.
+ Otherwise, say N.
+
# ARM920T
config CPU_ARM920T
bool "Support ARM920T processor"
diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index d10db82..053957e 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -49,6 +49,7 @@
obj-$(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
diff --git a/arch/arm/mm/proc-arm9tdmi.S b/arch/arm/mm/proc-arm9tdmi.S
new file mode 100644
index 0000000..95c90f13
--- /dev/null
+++ b/arch/arm/mm/proc-arm9tdmi.S
@@ -0,0 +1,134 @@
+/*
+ * 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