diff options
Diffstat (limited to 'src/jtag')
| -rw-r--r-- | src/jtag/core.c | 19 | ||||
| -rw-r--r-- | src/jtag/jtag.h | 13 |
2 files changed, 31 insertions, 1 deletions
diff --git a/src/jtag/core.c b/src/jtag/core.c index 27c7b3d..806ee89 100644 --- a/src/jtag/core.c +++ b/src/jtag/core.c @@ -136,14 +136,19 @@ int jtag_error_clear(void) /************/ -static bool jtag_poll = 1; +static bool jtag_poll = true; +static bool jtag_poll_en = true; bool is_jtag_poll_safe(void) { /* Polling can be disabled explicitly with set_enabled(false). + * It can also be masked with mask(). * It is also implicitly disabled while TRST is active and * while SRST is gating the JTAG clock. */ + if (!jtag_poll_en) + return false; + if (!transport_is_jtag()) return jtag_poll; @@ -162,6 +167,18 @@ void jtag_poll_set_enabled(bool value) jtag_poll = value; } +bool jtag_poll_mask(void) +{ + bool retval = jtag_poll_en; + jtag_poll_en = false; + return retval; +} + +void jtag_poll_unmask(bool saved) +{ + jtag_poll_en = saved; +} + /************/ struct jtag_tap *jtag_all_taps(void) diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h index 18e09ce..4f94e99 100644 --- a/src/jtag/jtag.h +++ b/src/jtag/jtag.h @@ -587,6 +587,19 @@ bool jtag_poll_get_enabled(void); */ void jtag_poll_set_enabled(bool value); +/** + * Mask (disable) polling and return the current mask status that should be + * feed to jtag_poll_unmask() to restore it. + * Multiple nested calls to jtag_poll_mask() are allowed, each balanced with + * its call to jtag_poll_unmask(). + */ +bool jtag_poll_mask(void); + +/** + * Restore saved mask for polling. + */ +void jtag_poll_unmask(bool saved); + #include <jtag/minidriver.h> int jim_jtag_newtap(Jim_Interp *interp, int argc, Jim_Obj *const *argv); |