From 2783cba8106a86bd81635b509ccb5edb0ebd3d29 Mon Sep 17 00:00:00 2001 From: =?utf8?q?=C3=98yvind=20Harboe?= Date: Wed, 21 Oct 2009 14:45:39 +0200 Subject: [PATCH] Added target_read/write_phys_memory() fn's. mdX/mwX commands updated to support phys flag to specify bypassing of MMU. --- doc/openocd.texi | 16 +++++---- src/target/target.c | 75 ++++++++++++++++++++++++++++++++++------ src/target/target_type.h | 19 ++++++++++ 3 files changed, 94 insertions(+), 16 deletions(-) diff --git a/doc/openocd.texi b/doc/openocd.texi index 500faf9a59..4f228325c1 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -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 diff --git a/src/target/target.c b/src/target/target.c index 7763b95644..4516207018 100644 --- a/src/target/target.c +++ b/src/target/target.c @@ -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 [count]"); - register_command(cmd_ctx, NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words [count]"); - register_command(cmd_ctx, NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes [count]"); + register_command(cmd_ctx, NULL, "mdw", handle_md_command, COMMAND_EXEC, "display memory words [phys] [count]"); + register_command(cmd_ctx, NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words [phys] [count]"); + register_command(cmd_ctx, NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes [phys] [count]"); - register_command(cmd_ctx, NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word [count]"); - register_command(cmd_ctx, NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word [count]"); - register_command(cmd_ctx, NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte [count]"); + register_command(cmd_ctx, NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word [phys] [count]"); + register_command(cmd_ctx, NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word [phys] [count]"); + register_command(cmd_ctx, NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte [phys] [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; diff --git a/src/target/target_type.h b/src/target/target_type.h index d28608fe2d..aab4321ff5 100644 --- a/src/target/target_type.h +++ b/src/target/target_type.h @@ -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); }; -- 2.30.2