mcr/mrc interface work. Implemented for arm926ejs and arm720t. mcr/mrc commands added.

src/target/arm720t.c

@@ -2,6 +2,9 @@
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
+ *   Copyright (C) 2009 by Øyvind Harboe                                   *
+ *   oyvind.harboe@zylin.com                                               *
+ *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
@@ -46,6 +49,9 @@ int arm720t_read_phys_memory(struct target_s *target, uint32_t address, uint32_t
 int arm720t_write_phys_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
 int arm720t_soft_reset_halt(struct target_s *target);
 
+static int arm720t_mrc(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value);
+static int arm720t_mcr(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value);
+
 target_type_t arm720t_target =
 {
 	.name = "arm720t",
@@ -82,7 +88,9 @@ target_type_t arm720t_target =
 	.target_create = arm720t_target_create,
 	.init_target = arm720t_init_target,
 	.examine = arm7tdmi_examine,
-	.quit = arm720t_quit
+	.quit = arm720t_quit,
+	.mrc = arm720t_mrc,
+	.mcr = arm720t_mcr,
 
 };
 
@@ -574,3 +582,29 @@ int arm720t_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, ch
 
 	return ERROR_OK;
 }
+
+
+static int arm720t_mrc(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+{
+	if (cpnum!=15)
+	{
+		LOG_ERROR("Only cp15 is supported");
+		return ERROR_FAIL;
+	}
+
+	return arm720t_read_cp15(target, mrc_opcode(cpnum, op1, op2, CRn, CRm), value);
+
+}
+
+static int arm720t_mcr(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+{
+	if (cpnum!=15)
+	{
+		LOG_ERROR("Only cp15 is supported");
+		return ERROR_FAIL;
+	}
+
+	return arm720t_write_cp15(target, mrc_opcode(cpnum, op1, op2, CRn, CRm), value);
+}
+
+

src/target/arm926ejs.c

@@ -2,7 +2,7 @@
  *   Copyright (C) 2007 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   Copyright (C) 2009 by Øyvind Harboe                                   *
+ *   Copyright (C) 2007,2008,2009 by Øyvind Harboe                         *
  *   oyvind.harboe@zylin.com                                               *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -35,7 +35,6 @@
 
 /* cli handling */
 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int arm926ejs_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 
 int arm926ejs_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
@@ -52,6 +51,29 @@ int arm926ejs_write_phys_memory(struct target_s *target, uint32_t address, uint3
 static int arm926ejs_virt2phys(struct target_s *target, uint32_t virtual, uint32_t *physical);
 static int arm926ejs_mmu(struct target_s *target, int *enabled);
 
+int arm926ejs_cp15_read(target_t *target, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value);
+int arm926ejs_cp15_write(target_t *target, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value);
+
+static int arm926ejs_mrc(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+{
+	if (cpnum!=15)
+	{
+		LOG_ERROR("Only cp15 is supported");
+		return ERROR_FAIL;
+	}
+	return arm926ejs_cp15_read(target, op1, op2, CRn, CRm, value);
+}
+
+static int arm926ejs_mcr(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+{
+	if (cpnum!=15)
+	{
+		LOG_ERROR("Only cp15 is supported");
+		return ERROR_FAIL;
+	}
+	return arm926ejs_cp15_write(target, op1, op2, CRn, CRm, value);
+}
+
 target_type_t arm926ejs_target =
 {
 	.name = "arm926ejs",
@@ -94,6 +116,8 @@ target_type_t arm926ejs_target =
 
 	.read_phys_memory = arm926ejs_read_phys_memory,
 	.write_phys_memory = arm926ejs_write_phys_memory,
+	.mrc = arm926ejs_mrc,
+	.mcr = arm926ejs_mcr,
 };
 
 int arm926ejs_catch_broken_irscan(uint8_t *captured, void *priv, scan_field_t *field)

src/target/armv4_5.h

@@ -5,6 +5,9 @@
  *   Copyright (C) 2008 by Spencer Oliver                                  *
  *   spen@spen-soft.co.uk                                                  *
  *                                                                         *
+ *   Copyright (C) 2009 by Øyvind Harboe                                   *
+ *   oyvind.harboe@zylin.com                                               *
+ *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
@@ -315,4 +318,19 @@ extern int armv4_5_invalidate_core_regs(target_t *target);
  */
 #define ARMV5_T_BKPT(Im) ((0xbe00 | Im) | ((0xbe00 | Im) << 16))
 
+/* build basic mrc/mcr opcode */
+
+static inline uint32_t mrc_opcode(int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm)
+{
+	uint32_t t = 0;
+	t|=op1<<21;
+	t|=op2<<5;
+	t|=CRn<<16;
+	t|=CRm<<0;
+	return t;
+}
+
+
+
+
 #endif /* ARMV4_5_H */

src/target/target.c

@@ -69,6 +69,7 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
 static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 
 static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
+static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
 static int jim_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
 static int jim_target(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
 
@@ -687,6 +688,60 @@ void target_reset_examined(struct target_s *target)
 }
 
 
+
+static int default_mrc(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+{
+	LOG_ERROR("Not implemented");
+	return ERROR_FAIL;
+}
+
+static int default_mcr(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+{
+	LOG_ERROR("Not implemented");
+	return ERROR_FAIL;
+}
+
+static int arm_cp_check(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm)
+{
+	/* basic check */
+	if (!target_was_examined(target))
+	{
+		LOG_ERROR("Target not examined yet");
+		return ERROR_FAIL;
+	}
+
+	if ((cpnum <0) || (cpnum > 15))
+	{
+		LOG_ERROR("Illegal co-processor %d", cpnum);
+		return ERROR_FAIL;
+	}
+
+	return ERROR_OK;
+}
+
+int target_mrc(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+{
+	int retval;
+
+	retval = arm_cp_check(target, cpnum, op1, op2, CRn, CRm);
+	if (retval != ERROR_OK)
+		return retval;
+
+	return target->type->mrc(target, cpnum, op1, op2, CRn, CRm, value);
+}
+
+int target_mcr(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+{
+	int retval;
+
+	retval = arm_cp_check(target, cpnum, op1, op2, CRn, CRm);
+	if (retval != ERROR_OK)
+		return retval;
+
+	return target->type->mcr(target, cpnum, op1, op2, CRn, CRm, value);
+}
+
+
 int target_init(struct command_context_s *cmd_ctx)
 {
 	target_t *target = all_targets;
@@ -722,6 +777,17 @@ int target_init(struct command_context_s *cmd_ctx)
 			target->type->write_phys_memory = target->type->write_memory;
 		}
 
+		if (target->type->mcr == NULL)
+		{
+			target->type->mcr = default_mcr;
+		}
+
+		if (target->type->mrc == NULL)
+		{
+			target->type->mrc = default_mrc;
+		}
+
+
 		/* a non-invasive way(in terms of patches) to add some code that
 		 * runs before the type->write/read_memory implementation
 		 */
@@ -1538,6 +1604,9 @@ int target_register_user_commands(struct command_context_s *cmd_ctx)
 	register_jim(cmd_ctx, "ocd_mem2array", jim_mem2array, "read memory and return as a TCL array for script processing <ARRAYNAME> <WIDTH = 32/16/8> <ADDRESS> <COUNT>");
 	register_jim(cmd_ctx, "ocd_array2mem", jim_array2mem, "convert a TCL array to memory locations and write the values  <ARRAYNAME> <WIDTH = 32/16/8> <ADDRESS> <COUNT>");
 
+	register_jim(cmd_ctx, "mrc", jim_mcrmrc, "read coprocessor <cpnum> <op1> <op2> <CRn> <CRm>");
+	register_jim(cmd_ctx, "mcr", jim_mcrmrc, "write coprocessor <cpnum> <op1> <op2> <CRn> <CRm> <value>");
+
 	register_command(cmd_ctx, NULL, "fast_load_image", handle_fast_load_image_command, COMMAND_ANY,
 			"same args as load_image, image stored in memory - mainly for profiling purposes");
 
@@ -3355,7 +3424,6 @@ static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 
 	return target_array2mem(interp,target, argc-1, argv + 1);
 }
-
 static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_Obj *const *argv)
 {
 	long l;
@@ -4693,10 +4761,90 @@ static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd
 	return retval;
 }
 
+static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+	command_context_t *context;
+	target_t *target;
+	int retval;
 
-/*
- * Local Variables:
- * c-basic-offset: 4
- * tab-width: 4
- * End:
- */
+	context = Jim_GetAssocData(interp, "context");
+	if (context == NULL) {
+		LOG_ERROR("array2mem: no command context");
+		return JIM_ERR;
+	}
+	target = get_current_target(context);
+	if (target == NULL) {
+		LOG_ERROR("array2mem: no current target");
+		return JIM_ERR;
+	}
+
+	if ((argc < 6) || (argc > 7))
+	{
+		return JIM_ERR;
+	}
+
+	int cpnum;
+	uint32_t op1;
+	uint32_t op2;
+	uint32_t CRn;
+	uint32_t CRm;
+	uint32_t value;
+
+	int e;
+	long l;
+	e = Jim_GetLong(interp, argv[1], &l);
+	if (e != JIM_OK) {
+		return e;
+	}
+	cpnum = l;
+
+	e = Jim_GetLong(interp, argv[2], &l);
+	if (e != JIM_OK) {
+		return e;
+	}
+	op1 = l;
+
+	e = Jim_GetLong(interp, argv[3], &l);
+	if (e != JIM_OK) {
+		return e;
+	}
+	op2 = l;
+
+	e = Jim_GetLong(interp, argv[4], &l);
+	if (e != JIM_OK) {
+		return e;
+	}
+	CRn = l;
+
+	e = Jim_GetLong(interp, argv[5], &l);
+	if (e != JIM_OK) {
+		return e;
+	}
+	CRm = l;
+
+	value = 0;
+
+	LOG_DEBUG("%d %d %d %d %d %d", cpnum, op1, op2, CRn, CRm, value);
+
+	if (argc == 7)
+	{
+		e = Jim_GetLong(interp, argv[6], &l);
+		if (e != JIM_OK) {
+			return e;
+		}
+		value = l;
+
+		retval = target_mcr(target, cpnum, op1, op2, CRn, CRm, value);
+		if (retval != ERROR_OK)
+			return JIM_ERR;
+	} else
+	{
+		retval = target_mrc(target, cpnum, op1, op2, CRn, CRm, &value);
+		if (retval != ERROR_OK)
+			return JIM_ERR;
+
+		Jim_SetResult(interp, Jim_NewIntObj(interp, value));
+	}
+
+	return JIM_OK;
+}

src/target/target.h

@@ -2,7 +2,7 @@
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
+ *   Copyright (C) 2007,2008,2009 Øyvind Harboe                            *
  *   oyvind.harboe@zylin.com                                               *
  *                                                                         *
  *   Copyright (C) 2008 by Spencer Oliver                                  *

src/target/target_type.h

@@ -2,7 +2,7 @@
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
+ *   Copyright (C) 2007,2008,2009 Øyvind Harboe                            *
  *   oyvind.harboe@zylin.com                                               *
  *                                                                         *
  *   Copyright (C) 2008 by Spencer Oliver                                  *
@@ -202,6 +202,11 @@ struct target_type_s
 
 	int (*mmu)(struct target_s *target, int *enabled);
 
+	/* Read coprocessor - arm specific. Default implementation returns error. */
+	int (*mrc)(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value);
+
+	/* Write coprocessor. Default implementation returns error.  */
+	int (*mcr)(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value);
 };
 
 #endif // TARGET_TYPE_H