From 75cdc8a260e081752698f374d4cd6e97e84eb6cb Mon Sep 17 00:00:00 2001
From: David Brownell <dbrownell@users.sourceforge.net>
Date: Fri, 23 Oct 2009 12:28:03 -0700
Subject: arm9tdmi vector_catch:  reserved means "don't use"

Bit 5 shouldn't be used.  Remove all support for modifying it.
Matches the exception vector table, of course ... more than one
bootloader uses that non-vector to help distinguish valid boot
images from random garbage in flash.
---
 src/target/arm9tdmi.c | 3 +--
 src/target/arm9tdmi.h | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

(limited to 'src/target')

diff --git a/src/target/arm9tdmi.c b/src/target/arm9tdmi.c
index f941922a..12b68ae5 100644
--- a/src/target/arm9tdmi.c
+++ b/src/target/arm9tdmi.c
@@ -95,7 +95,6 @@ static arm9tdmi_vector_t arm9tdmi_vectors[] =
 	{"swi", ARM9TDMI_SWI_VECTOR},
 	{"pabt", ARM9TDMI_PABT_VECTOR},
 	{"dabt", ARM9TDMI_DABT_VECTOR},
-	{"reserved", ARM9TDMI_RESERVED_VECTOR},
 	{"irq", ARM9TDMI_IRQ_VECTOR},
 	{"fiq", ARM9TDMI_FIQ_VECTOR},
 	{0, 0},
@@ -1067,7 +1066,7 @@ int arm9tdmi_register_commands(struct command_context_s *cmd_ctx)
 			"arm9tdmi specific commands");
 	register_command(cmd_ctx, arm9tdmi_cmd, "vector_catch",
 			handle_arm9tdmi_catch_vectors_command, COMMAND_EXEC,
-			"arm9 vector_catch [all|none|reset|undef|swi|pabt|dabt|reserved|irq|fiq] - separate vectors to catch by space");
+			"arm9 vector_catch [all|none|reset|undef|swi|pabt|dabt|irq|fiq] - separate vectors to catch by space");
 
 
 
diff --git a/src/target/arm9tdmi.h b/src/target/arm9tdmi.h
index 28be9b6c..9dfa8863 100644
--- a/src/target/arm9tdmi.h
+++ b/src/target/arm9tdmi.h
@@ -47,7 +47,7 @@ enum arm9tdmi_vector
 	ARM9TDMI_SWI_VECTOR = 0x04,
 	ARM9TDMI_PABT_VECTOR = 0x08,
 	ARM9TDMI_DABT_VECTOR = 0x10,
-	ARM9TDMI_RESERVED_VECTOR = 0x20,
+	/* BIT(5) reserved -- must be zero */
 	ARM9TDMI_IRQ_VECTOR = 0x40,
 	ARM9TDMI_FIQ_VECTOR = 0x80,
 };
-- 
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