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Added target_read/write_phys_memory() fn's. mdX/mwX commands updated to support phys flag to specify bypassing of MMU.

This commit is contained in:
Øyvind Harboe 2009-10-21 14:45:39 +02:00
parent 818cedaff3
commit 2783cba810
3 changed files with 94 additions and 16 deletions
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16
doc/openocd.texi
View File

@ -4938,23 +4938,27 @@ Please use their TARGET object siblings to avoid making assumptions
about what TAP is the current target, or about MMU configuration.
@end enumerate
@deffn Command mdw addr [count]
@deffnx Command mdh addr [count]
@deffnx Command mdb addr [count]
@deffn Command mdw [phys] addr [count]
@deffnx Command mdh [phys] addr [count]
@deffnx Command mdb [phys] addr [count]
Display contents of address @var{addr}, as
32-bit words (@command{mdw}), 16-bit halfwords (@command{mdh}),
or 8-bit bytes (@command{mdb}).
If @var{count} is specified, displays that many units.
@var{phys} is an optional flag to indicate to use
physical address and bypass MMU
(If you want to manipulate the data instead of displaying it,
see the @code{mem2array} primitives.)
@end deffn
@deffn Command mww addr word
@deffnx Command mwh addr halfword
@deffnx Command mwb addr byte
@deffn Command mww [phys] addr word
@deffnx Command mwh [phys] addr halfword
@deffnx Command mwb [phys] addr byte
Writes the specified @var{word} (32 bits),
@var{halfword} (16 bits), or @var{byte} (8-bit) pattern,
at the specified address @var{addr}.
@var{phys} is an optional flag to indicate to use
physical address and bypass MMU
@end deffn

75
src/target/target.c
View File

@ -601,11 +601,24 @@ int target_read_memory(struct target_s *target,
return target->type->read_memory(target, address, size, count, buffer);
}
int target_read_phys_memory(struct target_s *target,
uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
{
return target->type->read_phys_memory(target, address, size, count, buffer);
}
int target_write_memory(struct target_s *target,
uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
{
return target->type->write_memory(target, address, size, count, buffer);
}
int target_write_phys_memory(struct target_s *target,
uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
{
return target->type->write_phys_memory(target, address, size, count, buffer);
}
int target_bulk_write_memory(struct target_s *target,
uint32_t address, uint32_t count, uint8_t *buffer)
{
@ -698,6 +711,17 @@ int target_init(struct command_context_s *cmd_ctx)
{
target->type->virt2phys = default_virt2phys;
}
if (target->type->read_phys_memory == NULL)
{
target->type->read_phys_memory = target->type->read_memory;
}
if (target->type->write_phys_memory == NULL)
{
target->type->write_phys_memory = target->type->write_memory;
}
/* a non-invasive way(in terms of patches) to add some code that
* runs before the type->write/read_memory implementation
*/
@ -1531,13 +1555,13 @@ int target_register_user_commands(struct command_context_s *cmd_ctx)
register_command(cmd_ctx, NULL, "reset", handle_reset_command, COMMAND_EXEC, "reset target [run | halt | init] - default is run");
register_command(cmd_ctx, NULL, "soft_reset_halt", handle_soft_reset_halt_command, COMMAND_EXEC, "halt the target and do a soft reset");
register_command(cmd_ctx, NULL, "mdw", handle_md_command, COMMAND_EXEC, "display memory words <addr> [count]");
register_command(cmd_ctx, NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words <addr> [count]");
register_command(cmd_ctx, NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes <addr> [count]");
register_command(cmd_ctx, NULL, "mdw", handle_md_command, COMMAND_EXEC, "display memory words [phys] <addr> [count]");
register_command(cmd_ctx, NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words [phys] <addr> [count]");
register_command(cmd_ctx, NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes [phys] <addr> [count]");
register_command(cmd_ctx, NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word <addr> <value> [count]");
register_command(cmd_ctx, NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word <addr> <value> [count]");
register_command(cmd_ctx, NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte <addr> <value> [count]");
register_command(cmd_ctx, NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word [phys] <addr> <value> [count]");
register_command(cmd_ctx, NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word [phys] <addr> <value> [count]");
register_command(cmd_ctx, NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte [phys] <addr> <value> [count]");
register_command(cmd_ctx, NULL, "bp",
handle_bp_command, COMMAND_EXEC,
@ -2183,6 +2207,22 @@ static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char
default: return ERROR_COMMAND_SYNTAX_ERROR;
}
bool physical=strcmp(args[0], "phys")==0;
int (*fn)(struct target_s *target,
uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
if (physical)
{
argc--;
args++;
fn=target_read_phys_memory;
} else
{
fn=target_read_memory;
}
if ((argc < 1) || (argc > 2))
{
return ERROR_COMMAND_SYNTAX_ERROR;
}
uint32_t address;
int retval = parse_u32(args[0], &address);
if (ERROR_OK != retval)
@ -2199,8 +2239,7 @@ static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char
uint8_t *buffer = calloc(count, size);
target_t *target = get_current_target(cmd_ctx);
retval = target_read_memory(target,
address, size, count, buffer);
retval = fn(target, address, size, count, buffer);
if (ERROR_OK == retval)
handle_md_output(cmd_ctx, target, address, size, count, buffer);
@ -2211,7 +2250,23 @@ static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char
static int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if ((argc < 2) || (argc > 3))
if (argc < 2)
{
return ERROR_COMMAND_SYNTAX_ERROR;
}
bool physical=strcmp(args[0], "phys")==0;
int (*fn)(struct target_s *target,
uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
if (physical)
{
argc--;
args++;
fn=target_write_phys_memory;
} else
{
fn=target_write_memory;
}
if ((argc < 2) || (argc > 3))
return ERROR_COMMAND_SYNTAX_ERROR;
uint32_t address;
@ -2254,7 +2309,7 @@ static int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char
}
for (unsigned i = 0; i < count; i++)
{
retval = target_write_memory(target,
retval = fn(target,
address + i * wordsize, wordsize, 1, value_buf);
if (ERROR_OK != retval)
return retval;

19
src/target/target_type.h
View File

@ -180,7 +180,26 @@ struct target_type_s
int (*init_target)(struct command_context_s *cmd_ctx, struct target_s *target);
int (*quit)(void);
/* translate from virtual to physical address. Default implementation is successful
* no-op(i.e. virtual==physical).
*/
int (*virt2phys)(struct target_s *target, uint32_t address, uint32_t *physical);
/* read directly from physical memory. caches are bypassed and untouched.
*
* If the target does not support disabling caches, leaving them untouched,
* then minimally the actual physical memory location will be read even
* if cache states are unchanged, flushed, etc.
*
* Default implementation is to call read_memory.
*/
int (*read_phys_memory)(struct target_s *target, uint32_t phys_address, uint32_t size, uint32_t count, uint8_t *buffer);
/*
* same as read_phys_memory, except that it writes...
*/
int (*write_phys_memory)(struct target_s *target, uint32_t phys_address, uint32_t size, uint32_t count, uint8_t *buffer);
int (*mmu)(struct target_s *target, int *enabled);
};