linux-kernel - [PATCH 4/4] Blackfin: override text/data checking functions

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Message-Id: <1245255744-21039-4-git-send-email-vapier@gentoo.org>
Date:	Wed, 17 Jun 2009 12:22:24 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...hat.com, rgetz@...ckfin.uclinux.org,
	akpm@...ux-foundation.org
Subject: [PATCH 4/4] Blackfin: override text/data checking functions

Signed-off-by: Mike Frysinger <vapier@...too.org>
---
 arch/blackfin/include/asm/sections.h |   38 +++++++++++++++++++++++++++++++--
 1 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/arch/blackfin/include/asm/sections.h b/arch/blackfin/include/asm/sections.h
index e7fd0ec..ae4dae1 100644
--- a/arch/blackfin/include/asm/sections.h
+++ b/arch/blackfin/include/asm/sections.h
@@ -1,9 +1,6 @@
 #ifndef _BLACKFIN_SECTIONS_H
 #define _BLACKFIN_SECTIONS_H
 
-/* nothing to see, move along */
-#include <asm-generic/sections.h>
-
 /* only used when MTD_UCLINUX */
 extern unsigned long memory_mtd_start, memory_mtd_end, mtd_size;
 
@@ -15,4 +12,39 @@ extern char _stext_l1[], _etext_l1[], _sdata_l1[], _edata_l1[], _sbss_l1[],
 	_stext_l2[], _etext_l2[], _sdata_l2[], _edata_l2[], _sbss_l2[],
 	_ebss_l2[], _l2_lma_start[];
 
+#include <asm/mem_map.h>
+
+/* Blackfin systems have discontinuous memory map and no virtualized memory */
+static inline int arch_is_kernel_text(unsigned long addr)
+{
+	return
+		(L1_CODE_LENGTH &&
+		 addr >= (unsigned long)_stext_l1 &&
+		 addr <  (unsigned long)_etext_l1)
+		||
+		(L2_LENGTH &&
+		 addr >= (unsigned long)_stext_l2 &&
+		 addr <  (unsigned long)_etext_l2);
+}
+#define arch_is_kernel_text(addr) arch_is_kernel_text(addr)
+
+static inline int arch_is_kernel_data(unsigned long addr)
+{
+	return
+		(L1_DATA_A_LENGTH &&
+		 addr >= (unsigned long)_sdata_l1 &&
+		 addr <  (unsigned long)_ebss_l1)
+		||
+		(L1_DATA_B_LENGTH &&
+		 addr >= (unsigned long)_sdata_b_l1 &&
+		 addr <  (unsigned long)_ebss_b_l1)
+		||
+		(L2_LENGTH &&
+		 addr >= (unsigned long)_sdata_l2 &&
+		 addr <  (unsigned long)_ebss_l2);
+}
+#define arch_is_kernel_data(addr) arch_is_kernel_data(addr)
+
+#include <asm-generic/sections.h>
+
 #endif
-- 
1.6.3.1

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