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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.
__archive__
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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4
doc/openocd.texi
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@ -5460,6 +5460,8 @@ ARMv5TE architecture instead of ARMv4T.
@c 9-june-2009: tried this on arm920t, it didn't work.
@c no-params always lists nothing caught, and that's how it acts.
@c 23-oct-2009: doesn't work _consistently_ ... as if the ICE
@c versions have different rules about when they commit writes.
@anchor{arm9tdmi vector_catch}
@deffn Command {arm9tdmi vector_catch} [@option{all}|@option{none}|list]
@ -5476,7 +5478,7 @@ vector catch hardware to intercept
@option{all} of the hardware vectors,
@option{none} of them,
or a list with one or more of the following:
@option{reset} @option{undef} @option{swi} @option{pabt} @option{dabt} @option{reserved}
@option{reset} @option{undef} @option{swi} @option{pabt} @option{dabt}
@option{irq} @option{fiq}.
@end deffn

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
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@ -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,
};