bc5a39bf26
This commit defines an interface allowing multi-phase reset. This aims to solve a problem of the actual single-phase reset (built in DeviceClass and BusClass): reset behavior is dependent on the order in which reset handlers are called. In particular doing external side-effect (like setting an qemu_irq) is problematic because receiving object may not be reset yet. The Resettable interface divides the reset in 3 well defined phases. To reset an object tree, all 1st phases are executed then all 2nd then all 3rd. See the comments in include/hw/resettable.h for a more complete description. The interface defines 3 phases to let the future possibility of holding an object into reset for some time. The qdev/qbus reset in DeviceClass and BusClass will be modified in following commits to use this interface. A mechanism is provided to allow executing a transitional reset handler in place of the 2nd phase which is executed in children-then-parent order inside a tree. This will allow to transition devices and buses smoothly while keeping the exact current qdev/qbus reset behavior for now. Documentation will be added in a following commit. Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200123132823.1117486-4-damien.hedde@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
29 lines
2.0 KiB
Plaintext
29 lines
2.0 KiB
Plaintext
# loader.c
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loader_write_rom(const char *name, uint64_t gpa, uint64_t size, bool isrom) "%s: @0x%"PRIx64" size=0x%"PRIx64" ROM=%d"
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# qdev.c
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qdev_reset(void *obj, const char *objtype) "obj=%p(%s)"
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qdev_reset_all(void *obj, const char *objtype) "obj=%p(%s)"
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qdev_reset_tree(void *obj, const char *objtype) "obj=%p(%s)"
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qbus_reset(void *obj, const char *objtype) "obj=%p(%s)"
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qbus_reset_all(void *obj, const char *objtype) "obj=%p(%s)"
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qbus_reset_tree(void *obj, const char *objtype) "obj=%p(%s)"
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qdev_update_parent_bus(void *obj, const char *objtype, void *oldp, const char *oldptype, void *newp, const char *newptype) "obj=%p(%s) old_parent=%p(%s) new_parent=%p(%s)"
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# resettable.c
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resettable_reset(void *obj, int cold) "obj=%p cold=%d"
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resettable_reset_assert_begin(void *obj, int cold) "obj=%p cold=%d"
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resettable_reset_assert_end(void *obj) "obj=%p"
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resettable_reset_release_begin(void *obj, int cold) "obj=%p cold=%d"
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resettable_reset_release_end(void *obj) "obj=%p"
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resettable_phase_enter_begin(void *obj, const char *objtype, unsigned count, int type) "obj=%p(%s) count=%d type=%d"
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resettable_phase_enter_exec(void *obj, const char *objtype, int type, int has_method) "obj=%p(%s) type=%d method=%d"
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resettable_phase_enter_end(void *obj, const char *objtype, unsigned count) "obj=%p(%s) count=%d"
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resettable_phase_hold_begin(void *obj, const char *objtype, unsigned count, int type) "obj=%p(%s) count=%d type=%d"
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resettable_phase_hold_exec(void *obj, const char *objtype, int has_method) "obj=%p(%s) method=%d"
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resettable_phase_hold_end(void *obj, const char *objtype, unsigned count) "obj=%p(%s) count=%d"
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resettable_phase_exit_begin(void *obj, const char *objtype, unsigned count, int type) "obj=%p(%s) count=%d type=%d"
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resettable_phase_exit_exec(void *obj, const char *objtype, int has_method) "obj=%p(%s) method=%d"
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resettable_phase_exit_end(void *obj, const char *objtype, unsigned count) "obj=%p(%s) count=%d"
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resettable_transitional_function(void *obj, const char *objtype) "obj=%p(%s)"
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