Add 64-bit and multihart support

This is a major rewrite of the RISC-V v0.13 OpenOCD port.  This
shouldn't have any meaningful effect on the v0.11 support, but it does
add generic versions of many functions that will allow me to later
refactor the v0.11 support so it's easier to maintain both ports.  This
started as an emergency feature branch and went on for a long time, so
it's all been squashed down into one commit so there isn't a big set of
broken commits lying around.  The changes are:

 * You can pass "-rtos riscv" to the target in OpenOCD's configuration
   file, which enables multi-hart mode.  This uses OpenOCD's RTOS
   support to control all the harts from the debug module using commands
   like "info threads" in GDB.  This support is still expermental.

 * There is support for RV64I, but due to OpenOCD limitations we only
   support 32-bit physical addresses.  I hope to remedy this by rebasing
   onto the latest OpenOCD release, which I've heard should fix this.

 * This matches the latest draft version of the RISC-V debug spec, as of
   April 26th.  This version fixes a number of spec bugs and should be
   close to the final debug spec.

1 files changed, 8 insertions, 8 deletions

diff --git a/src/target/target.c b/src/target/target.c
index 42a8cac..7908a85 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -1088,7 +1088,7 @@ int target_add_breakpoint(struct target *target,
 		struct breakpoint *breakpoint)
 {
 	if ((target->state != TARGET_HALTED) && (breakpoint->type != BKPT_HARD)) {
-		LOG_WARNING("target %s is not halted", target_name(target));
+		LOG_WARNING("target %s is not halted (add breakpoint)", target_name(target));
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->add_breakpoint(target, breakpoint);
@@ -1098,7 +1098,7 @@ int target_add_context_breakpoint(struct target *target,
 		struct breakpoint *breakpoint)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target_name(target));
+		LOG_WARNING("target %s is not halted (add context breakpoint)", target_name(target));
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->add_context_breakpoint(target, breakpoint);
@@ -1108,7 +1108,7 @@ int target_add_hybrid_breakpoint(struct target *target,
 		struct breakpoint *breakpoint)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target_name(target));
+		LOG_WARNING("target %s is not halted (add hybrid breakpoint)", target_name(target));
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->add_hybrid_breakpoint(target, breakpoint);
@@ -1124,7 +1124,7 @@ int target_add_watchpoint(struct target *target,
 		struct watchpoint *watchpoint)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target_name(target));
+		LOG_WARNING("target %s is not halted (add watchpoint)", target_name(target));
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->add_watchpoint(target, watchpoint);
@@ -1138,7 +1138,7 @@ int target_hit_watchpoint(struct target *target,
 		struct watchpoint **hit_watchpoint)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target->cmd_name);
+		LOG_WARNING("target %s is not halted (hit watchpoint)", target->cmd_name);
 		return ERROR_TARGET_NOT_HALTED;
 	}
 
@@ -1167,7 +1167,7 @@ int target_step(struct target *target,
 int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fileio_info)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target->cmd_name);
+		LOG_WARNING("target %s is not halted (gdb fileio)", target->cmd_name);
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->get_gdb_fileio_info(target, fileio_info);
@@ -1176,7 +1176,7 @@ int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fi
 int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target->cmd_name);
+		LOG_WARNING("target %s is not halted (gdb fileio end)", target->cmd_name);
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->gdb_fileio_end(target, retcode, fileio_errno, ctrl_c);
@@ -1186,7 +1186,7 @@ int target_profiling(struct target *target, uint32_t *samples,
 			uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
 {
 	if (target->state != TARGET_HALTED) {
-		LOG_WARNING("target %s is not halted", target->cmd_name);
+		LOG_WARNING("target %s is not halted (profiling)", target->cmd_name);
 		return ERROR_TARGET_NOT_HALTED;
 	}
 	return target->type->profiling(target, samples, max_num_samples,