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arm9tdmi vector_catch: reserved means "don't use"

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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.
This commit is contained in:
David Brownell
2009-10-23 12:28:03 -07:00
parent bfefe85645
commit 75cdc8a260
3 changed files with 5 additions and 4 deletions
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3
src/target/arm9tdmi.c
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@@ -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");

2
src/target/arm9tdmi.h
View File

@@ -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,
};