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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-09-28 22:20:39 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-09-28 22:20:39 +0100
commit250d375d1da45a5e08ab8baf5eaa7eb258afd82b (patch)
treefb5dc6df00065f11578f837835c6d5a99530b223 /arch/arm/kernel
parent84904d0ead0a8c419abd45c7b2ac8d76d50a0d48 (diff)
parent6afd6fae1d5f7e7129a10c4f3e32018966eeac1c (diff)
downloadop-kernel-dev-250d375d1da45a5e08ab8baf5eaa7eb258afd82b.zip
op-kernel-dev-250d375d1da45a5e08ab8baf5eaa7eb258afd82b.tar.gz
Merge nommu branch
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/head-nommu.S12
-rw-r--r--arch/arm/kernel/module.c8
-rw-r--r--arch/arm/kernel/process.c22
3 files changed, 35 insertions, 7 deletions
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index ac9eb3d..f359a18 100644
--- 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
@@ -73,7 +77,13 @@ __after_proc_init:
#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
index 298363d..1b06158 100644
--- 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
index 3079535..bf35c17 100644
--- 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)
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