ARM: Add base support for ARMv7-M

This patch adds the base support for the ARMv7-M
architecture. It consists of the corresponding arch/arm/mm/ files and
various #ifdef's around the kernel. Exception handling is implemented by
a subsequent patch.

[ukleinek: squash in some changes originating from commit

b5717ba (Cortex-M3: Add support for the Microcontroller Prototyping System)

from the v2.6.33-arm1 patch stack, port to post 3.6, drop zImage
support, drop reorganisation of pt_regs, assert CONFIG_CPU_V7M doesn't
leak into installed headers and a few cosmetic changes]

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Jonathan Austin <jonathan.austin@arm.com>
Tested-by: Jonathan Austin <jonathan.austin@arm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/arm/mm/cache-nop.S b/arch/arm/mm/cache-nop.S
new file mode 100644
index 000000000000..8e12ddca0031
--- /dev/null
+++ b/arch/arm/mm/cache-nop.S
@@ -0,0 +1,50 @@
+/*
+ * 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 "proc-macros.S"
+
+ENTRY(nop_flush_icache_all)
+        mov     pc, lr
+ENDPROC(nop_flush_icache_all)
+
+        .globl nop_flush_kern_cache_all
+        .equ nop_flush_kern_cache_all, nop_flush_icache_all
+
+        .globl nop_flush_kern_cache_louis
+        .equ nop_flush_kern_cache_louis, nop_flush_icache_all
+
+        .globl nop_flush_user_cache_all
+        .equ nop_flush_user_cache_all, nop_flush_icache_all
+
+        .globl nop_flush_user_cache_range
+        .equ nop_flush_user_cache_range, nop_flush_icache_all
+
+        .globl nop_coherent_kern_range
+        .equ nop_coherent_kern_range, nop_flush_icache_all
+
+ENTRY(nop_coherent_user_range)
+        mov     r0, 0
+        mov     pc, lr
+ENDPROC(nop_coherent_user_range)
+
+        .globl nop_flush_kern_dcache_area
+        .equ nop_flush_kern_dcache_area, nop_flush_icache_all
+
+        .globl nop_dma_flush_range
+        .equ nop_dma_flush_range, nop_flush_icache_all
+
+        .globl nop_dma_map_area
+        .equ nop_dma_map_area, nop_flush_icache_all
+
+        .globl nop_dma_unmap_area
+        .equ nop_dma_unmap_area, nop_flush_icache_all
+
+        __INITDATA
+
+        @ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)
+        define_cache_functions nop