Merge nommu branch

git-mirror · Sep 28, 2006 · 250d375 · 250d375
2 parents 84904d0 + 6afd6fa
commit 250d375
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Showing 30 changed files with 2,123 additions and 408 deletions.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -99,7 +99,7 @@ config ARCH_MTD_XIP
 
 config VECTORS_BASE
 	hex
-	default 0xffff0000 if MMU
+	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 	default DRAM_BASE if REMAP_VECTORS_TO_RAM
 	default 0x00000000
 	help
@@ -626,6 +626,7 @@ config LEDS_CPU
 
 config ALIGNMENT_TRAP
 	bool
+	depends on CPU_CP15_MMU
 	default y if !ARCH_EBSA110
 	help
 	  ARM processors can not fetch/store information which is not
@@ -857,7 +858,7 @@ source "drivers/base/Kconfig"
 
 source "drivers/connector/Kconfig"
 
-if ALIGNMENT_TRAP
+if ALIGNMENT_TRAP || !CPU_CP15_MMU
 source "drivers/mtd/Kconfig"
 endif
 

diff --git a/arch/arm/Kconfig-nommu b/arch/arm/Kconfig-nommu
@@ -25,6 +25,14 @@ config FLASH_SIZE
 	hex 'FLASH Size' if SET_MEM_PARAM
 	default 0x00400000
 
+config PROCESSOR_ID
+	hex
+	default 0x00007700
+	depends on !CPU_CP15
+	help
+	  If processor has no CP15 register, this processor ID is
+	  used instead of the auto-probing which utilizes the register.
+
 config REMAP_VECTORS_TO_RAM
 	bool 'Install vectors to the begining of RAM' if DRAM_BASE
 	depends on DRAM_BASE

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
@@ -55,7 +55,12 @@ 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_ARM740T)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM940T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM946T)	:=$(call cc-option,-mtune=arm9e,-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/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
@@ -51,7 +51,11 @@ OBJS		+= head-at91rm9200.o
 endif
 
 ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
+ifeq ($(CONFIG_CPU_CP15),y)
 OBJS		+= big-endian.o
+else
+# The endian should be set by h/w design.
+endif
 endif
 
 #

diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
@@ -82,9 +82,11 @@
 		kphex	r6, 8		/* processor id */
 		kputc	#':'
 		kphex	r7, 8		/* architecture id */
+#ifdef CONFIG_CPU_CP15
 		kputc	#':'
 		mrc	p15, 0, r0, c1, c0
 		kphex	r0, 8		/* control reg */
+#endif
 		kputc	#'\n'
 		kphex	r5, 8		/* decompressed kernel start */
 		kputc	#'-'
@@ -507,7 +509,11 @@ call_kernel:	bl	cache_clean_flush
  */
 
 call_cache_fn:	adr	r12, proc_types
+#ifdef CONFIG_CPU_CP15
 		mrc	p15, 0, r6, c0, c0	@ get processor ID
+#else
+		ldr	r6, =CONFIG_PROCESSOR_ID
+#endif
 1:		ldr	r1, [r12, #0]		@ get value
 		ldr	r2, [r12, #4]		@ get mask
 		eor	r1, r1, r6		@ (real ^ match)

diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
@@ -9,7 +9,6 @@
  * published by the Free Software Foundation.
  *
  *  Common kernel startup code (non-paged MM)
- *    for 32-bit CPUs which has a process ID register(CP15).
  *
  */
 #include <linux/linkage.h>
@@ -40,7 +39,11 @@
 ENTRY(stext)
 	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
 						@ and irqs disabled
+#ifndef CONFIG_CPU_CP15
+	ldr	r9, =CONFIG_PROCESSOR_ID
+#else
 	mrc	p15, 0, r9, c0, c0		@ get processor id
+#endif
 	bl	__lookup_processor_type		@ r5=procinfo r9=cpuid
 	movs	r10, r5				@ invalid processor (r5=0)?
 	beq	__error_p				@ yes, error 'p'
@@ -58,6 +61,7 @@ ENTRY(stext)
  */
 	.type	__after_proc_init, %function
 __after_proc_init:
+#ifdef CONFIG_CPU_CP15
 	mrc	p15, 0, r0, c1, c0, 0		@ read control reg
 #ifdef CONFIG_ALIGNMENT_TRAP
 	orr	r0, r0, #CR_A
@@ -72,8 +76,14 @@ __after_proc_init:
 #endif
 #ifdef CONFIG_CPU_ICACHE_DISABLE
 	bic	r0, r0, #CR_I
+#endif
+#ifdef CONFIG_CPU_HIGH_VECTOR
+	orr	r0, r0, #CR_V
+#else
+	bic	r0, r0, #CR_V
 #endif
 	mcr	p15, 0, r0, c1, c0, 0		@ write control reg
+#endif /* CONFIG_CPU_CP15 */
 
 	mov	pc, r13				@ clear the BSS and jump
 						@ to start_kernel

diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
@@ -2,6 +2,7 @@
  *  linux/arch/arm/kernel/module.c
  *
  *  Copyright (C) 2002 Russell King.
+ *  Modified for nommu by Hyok S. Choi
  *
  * 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
@@ -32,6 +33,7 @@ extern void _etext;
 #define MODULE_START	(((unsigned long)&_etext + ~PGDIR_MASK) & PGDIR_MASK)
 #endif
 
+#ifdef CONFIG_MMU
 void *module_alloc(unsigned long size)
 {
 	struct vm_struct *area;
@@ -46,6 +48,12 @@ void *module_alloc(unsigned long size)
 
 	return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
 }
+#else /* CONFIG_MMU */
+void *module_alloc(unsigned long size)
+{
+	return size == 0 ? NULL : vmalloc(size);
+}
+#endif /* !CONFIG_MMU */
 
 void module_free(struct module *module, void *region)
 {

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
@@ -221,16 +221,26 @@ void __show_regs(struct pt_regs *regs)
 		processor_modes[processor_mode(regs)],
 		thumb_mode(regs) ? " (T)" : "",
 		get_fs() == get_ds() ? "kernel" : "user");
+#if CONFIG_CPU_CP15
 	{
-		unsigned int ctrl, transbase, dac;
+		unsigned int ctrl;
 		  __asm__ (
 		"	mrc p15, 0, %0, c1, c0\n"
-		"	mrc p15, 0, %1, c2, c0\n"
-		"	mrc p15, 0, %2, c3, c0\n"
-		: "=r" (ctrl), "=r" (transbase), "=r" (dac));
-		printk("Control: %04X  Table: %08X  DAC: %08X\n",
-		  	ctrl, transbase, dac);
+		: "=r" (ctrl));
+		printk("Control: %04X\n", ctrl);
 	}
+#ifdef CONFIG_CPU_CP15_MMU
+	{
+		unsigned int transbase, dac;
+		  __asm__ (
+		"	mrc p15, 0, %0, c2, c0\n"
+		"	mrc p15, 0, %1, c3, c0\n"
+		: "=r" (transbase), "=r" (dac));
+		printk("Table: %08X  DAC: %08X\n",
+		  	transbase, dac);
+	}
+#endif
+#endif
 }
 
 void show_regs(struct pt_regs * regs)