| Message ID | 1465835259-21449-4-git-send-email-fred.konrad@greensocs.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Jun 13, 2016 at 9:27 AM, <fred.konrad@greensocs.com> wrote: > From: KONRAD Frederic <fred.konrad@greensocs.com> > > This introduces the clock binding and the update part. > When the qemu_clk_rate_update(qemu_clk, int) function is called: > * The clock callback is called on the qemu_clk so it can change the rate. > * The qemu_clk_rate_update function is called on all the driven clock. > > Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> > --- > include/qemu/qemu-clock.h | 65 +++++++++++++++++++++++++++++++++++++++++++++++ > qemu-clock.c | 56 ++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 121 insertions(+) > > diff --git a/include/qemu/qemu-clock.h b/include/qemu/qemu-clock.h > index a2ba105..677de9a 100644 > --- a/include/qemu/qemu-clock.h > +++ b/include/qemu/qemu-clock.h > @@ -27,15 +27,29 @@ > #include "qemu/osdep.h" > #include "qom/object.h" > > +typedef float (*qemu_clk_on_rate_update_cb)(void *opaque, float rate); > + > #define TYPE_CLOCK "qemu-clk" > #define QEMU_CLOCK(obj) OBJECT_CHECK(struct qemu_clk, (obj), TYPE_CLOCK) > > +typedef struct ClkList ClkList; > + > typedef struct qemu_clk { > /*< private >*/ > Object parent_obj; > char *name; /* name of this clock in the device. */ > + float in_rate; /* rate of the clock which drive this pin. */ > + float out_rate; /* rate of this clock pin. */ > + void *opaque; > + qemu_clk_on_rate_update_cb cb; > + QLIST_HEAD(, ClkList) bound; > } *qemu_clk; > > +struct ClkList { > + qemu_clk clk; > + QLIST_ENTRY(ClkList) node; > +}; > + > /** > * qemu_clk_attach_to_device: > * @d: the device on which the clock need to be attached. > @@ -59,4 +73,55 @@ void qemu_clk_attach_to_device(DeviceState *d, qemu_clk clk, > */ > qemu_clk qemu_clk_get_pin(DeviceState *d, const char *name); > > +/** > + * qemu_clk_bound_clock: Maybe this should be bind and unbind clock instead of bound and unbound. > + * @out: the clock output. > + * @in: the clock input. > + * > + * Connect the clock together. This is unidirectionnal so a > + * qemu_clk_update_rate will go from @out to @in. s/unidirectionnal/unidirectional/g > + * > + */ > +void qemu_clk_bound_clock(qemu_clk out, qemu_clk in); > + > +/** > + * qemu_clk_unbound: > + * @out: the clock output. > + * @in: the clock input. > + * > + * Disconnect the clock if they were bound together. clocks > + * > + */ > +void qemu_clk_unbound(qemu_clk out, qemu_clk in); > + > +/** > + * qemu_clk_update_rate: > + * @clk: the clock to update. > + * @rate: the new rate. > + * > + * Update the @clk to the new @rate. > + * > + */ > +void qemu_clk_update_rate(qemu_clk clk, float rate); > + > +/** > + * qemu_clk_refresh: > + * @clk: the clock to be refreshed. > + * > + * This updates all childs of a clock without changing its own rate. Can you clarify what this does? > + * > + */ > +void qemu_clk_refresh(qemu_clk clk); > + > +/** > + * qemu_clk_set_callback: > + * @clk: the clock where to set the callback. > + * @cb: the callback to associate to the callback. > + * @opaque: the opaque data passed to the calback. > + * > + */ > +void qemu_clk_set_callback(qemu_clk clk, > + qemu_clk_on_rate_update_cb cb, > + void *opaque); > + > #endif /* QEMU_CLOCK_H */ > diff --git a/qemu-clock.c b/qemu-clock.c > index 81f2852..811d6a0 100644 > --- a/qemu-clock.c > +++ b/qemu-clock.c > @@ -34,6 +34,62 @@ do { printf("qemu-clock: " fmt , ## __VA_ARGS__); } while (0) > #define DPRINTF(fmt, ...) do { } while (0) > #endif > > +void qemu_clk_refresh(qemu_clk clk) > +{ > + qemu_clk_update_rate(clk, clk->in_rate); > +} > + > +void qemu_clk_update_rate(qemu_clk clk, float rate) > +{ > + ClkList *child; > + > + clk->in_rate = rate; > + clk->out_rate = rate; > + > + if (clk->cb) { > + clk->out_rate = clk->cb(clk->opaque, rate); > + } > + > + DPRINTF("%s output rate updated to %.1f\n", > + object_get_canonical_path(OBJECT(clk)), > + clk->out_rate); > + > + QLIST_FOREACH(child, &clk->bound, node) { > + qemu_clk_update_rate(child->clk, clk->out_rate); > + } > +} > + > +void qemu_clk_bound_clock(qemu_clk out, qemu_clk in) > +{ > + ClkList *child; > + > + child = g_malloc(sizeof(child)); > + assert(child); > + child->clk = in; > + QLIST_INSERT_HEAD(&out->bound, child, node); > + qemu_clk_update_rate(in, out->out_rate); > +} > + > +void qemu_clk_unbound(qemu_clk out, qemu_clk in) > +{ > + ClkList *child, *next; > + > + QLIST_FOREACH_SAFE(child, &out->bound, node, next) { > + if (child->clk == in) { > + QLIST_REMOVE(child, node); > + g_free(child); > + } > + } > +} > + > +void qemu_clk_set_callback(qemu_clk clk, > + qemu_clk_on_rate_update_cb cb, > + void *opaque) > +{ > + clk->cb = cb; > + clk->opaque = opaque; > +} > + > void qemu_clk_attach_to_device(DeviceState *d, qemu_clk clk, const char *name) > { > assert(name); > -- > 2.5.5 > >
On 13 June 2016 at 17:27, <fred.konrad@greensocs.com> wrote: > From: KONRAD Frederic <fred.konrad@greensocs.com> > > This introduces the clock binding and the update part. > When the qemu_clk_rate_update(qemu_clk, int) function is called: > * The clock callback is called on the qemu_clk so it can change the rate. > * The qemu_clk_rate_update function is called on all the driven clock. > > Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> > --- > include/qemu/qemu-clock.h | 65 +++++++++++++++++++++++++++++++++++++++++++++++ > qemu-clock.c | 56 ++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 121 insertions(+) > > diff --git a/include/qemu/qemu-clock.h b/include/qemu/qemu-clock.h > index a2ba105..677de9a 100644 > --- a/include/qemu/qemu-clock.h > +++ b/include/qemu/qemu-clock.h > @@ -27,15 +27,29 @@ > #include "qemu/osdep.h" > #include "qom/object.h" > > +typedef float (*qemu_clk_on_rate_update_cb)(void *opaque, float rate); > + > #define TYPE_CLOCK "qemu-clk" > #define QEMU_CLOCK(obj) OBJECT_CHECK(struct qemu_clk, (obj), TYPE_CLOCK) > > +typedef struct ClkList ClkList; > + > typedef struct qemu_clk { > /*< private >*/ > Object parent_obj; > char *name; /* name of this clock in the device. */ > + float in_rate; /* rate of the clock which drive this pin. */ > + float out_rate; /* rate of this clock pin. */ I'm rather dubious that we should be using floats here. Almost nothing in our hardware emulation uses float or double. > + void *opaque; > + qemu_clk_on_rate_update_cb cb; > + QLIST_HEAD(, ClkList) bound; > } *qemu_clk; thanks -- PMM
Le 29/07/2016 à 15:39, Peter Maydell a écrit : > On 13 June 2016 at 17:27, <fred.konrad@greensocs.com> wrote: >> From: KONRAD Frederic <fred.konrad@greensocs.com> >> >> This introduces the clock binding and the update part. >> When the qemu_clk_rate_update(qemu_clk, int) function is called: >> * The clock callback is called on the qemu_clk so it can change the rate. >> * The qemu_clk_rate_update function is called on all the driven clock. >> >> Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> >> --- >> include/qemu/qemu-clock.h | 65 +++++++++++++++++++++++++++++++++++++++++++++++ >> qemu-clock.c | 56 ++++++++++++++++++++++++++++++++++++++++ >> 2 files changed, 121 insertions(+) >> >> diff --git a/include/qemu/qemu-clock.h b/include/qemu/qemu-clock.h >> index a2ba105..677de9a 100644 >> --- a/include/qemu/qemu-clock.h >> +++ b/include/qemu/qemu-clock.h >> @@ -27,15 +27,29 @@ >> #include "qemu/osdep.h" >> #include "qom/object.h" >> >> +typedef float (*qemu_clk_on_rate_update_cb)(void *opaque, float rate); >> + >> #define TYPE_CLOCK "qemu-clk" >> #define QEMU_CLOCK(obj) OBJECT_CHECK(struct qemu_clk, (obj), TYPE_CLOCK) >> >> +typedef struct ClkList ClkList; >> + >> typedef struct qemu_clk { >> /*< private >*/ >> Object parent_obj; >> char *name; /* name of this clock in the device. */ >> + float in_rate; /* rate of the clock which drive this pin. */ >> + float out_rate; /* rate of this clock pin. */ > I'm rather dubious that we should be using floats here. > Almost nothing in our hardware emulation uses float or double. We probably can use uint64_t here? Thanks, Fred > >> + void *opaque; >> + qemu_clk_on_rate_update_cb cb; >> + QLIST_HEAD(, ClkList) bound; >> } *qemu_clk; > thanks > -- PMM >
diff --git a/include/qemu/qemu-clock.h b/include/qemu/qemu-clock.h index a2ba105..677de9a 100644 --- a/include/qemu/qemu-clock.h +++ b/include/qemu/qemu-clock.h @@ -27,15 +27,29 @@ #include "qemu/osdep.h" #include "qom/object.h" +typedef float (*qemu_clk_on_rate_update_cb)(void *opaque, float rate); + #define TYPE_CLOCK "qemu-clk" #define QEMU_CLOCK(obj) OBJECT_CHECK(struct qemu_clk, (obj), TYPE_CLOCK) +typedef struct ClkList ClkList; + typedef struct qemu_clk { /*< private >*/ Object parent_obj; char *name; /* name of this clock in the device. */ + float in_rate; /* rate of the clock which drive this pin. */ + float out_rate; /* rate of this clock pin. */ + void *opaque; + qemu_clk_on_rate_update_cb cb; + QLIST_HEAD(, ClkList) bound; } *qemu_clk; +struct ClkList { + qemu_clk clk; + QLIST_ENTRY(ClkList) node; +}; + /** * qemu_clk_attach_to_device: * @d: the device on which the clock need to be attached. @@ -59,4 +73,55 @@ void qemu_clk_attach_to_device(DeviceState *d, qemu_clk clk, */ qemu_clk qemu_clk_get_pin(DeviceState *d, const char *name); +/** + * qemu_clk_bound_clock: + * @out: the clock output. + * @in: the clock input. + * + * Connect the clock together. This is unidirectionnal so a + * qemu_clk_update_rate will go from @out to @in. + * + */ +void qemu_clk_bound_clock(qemu_clk out, qemu_clk in); + +/** + * qemu_clk_unbound: + * @out: the clock output. + * @in: the clock input. + * + * Disconnect the clock if they were bound together. + * + */ +void qemu_clk_unbound(qemu_clk out, qemu_clk in); + +/** + * qemu_clk_update_rate: + * @clk: the clock to update. + * @rate: the new rate. + * + * Update the @clk to the new @rate. + * + */ +void qemu_clk_update_rate(qemu_clk clk, float rate); + +/** + * qemu_clk_refresh: + * @clk: the clock to be refreshed. + * + * This updates all childs of a clock without changing its own rate. + * + */ +void qemu_clk_refresh(qemu_clk clk); + +/** + * qemu_clk_set_callback: + * @clk: the clock where to set the callback. + * @cb: the callback to associate to the callback. + * @opaque: the opaque data passed to the calback. + * + */ +void qemu_clk_set_callback(qemu_clk clk, + qemu_clk_on_rate_update_cb cb, + void *opaque); + #endif /* QEMU_CLOCK_H */ diff --git a/qemu-clock.c b/qemu-clock.c index 81f2852..811d6a0 100644 --- a/qemu-clock.c +++ b/qemu-clock.c @@ -34,6 +34,62 @@ do { printf("qemu-clock: " fmt , ## __VA_ARGS__); } while (0) #define DPRINTF(fmt, ...) do { } while (0) #endif +void qemu_clk_refresh(qemu_clk clk) +{ + qemu_clk_update_rate(clk, clk->in_rate); +} + +void qemu_clk_update_rate(qemu_clk clk, float rate) +{ + ClkList *child; + + clk->in_rate = rate; + clk->out_rate = rate; + + if (clk->cb) { + clk->out_rate = clk->cb(clk->opaque, rate); + } + + DPRINTF("%s output rate updated to %.1f\n", + object_get_canonical_path(OBJECT(clk)), + clk->out_rate); + + QLIST_FOREACH(child, &clk->bound, node) { + qemu_clk_update_rate(child->clk, clk->out_rate); + } +} + +void qemu_clk_bound_clock(qemu_clk out, qemu_clk in) +{ + ClkList *child; + + child = g_malloc(sizeof(child)); + assert(child); + child->clk = in; + QLIST_INSERT_HEAD(&out->bound, child, node); + qemu_clk_update_rate(in, out->out_rate); +} + +void qemu_clk_unbound(qemu_clk out, qemu_clk in) +{ + ClkList *child, *next; + + QLIST_FOREACH_SAFE(child, &out->bound, node, next) { + if (child->clk == in) { + QLIST_REMOVE(child, node); + g_free(child); + } + } +} + +void qemu_clk_set_callback(qemu_clk clk, + qemu_clk_on_rate_update_cb cb, + void *opaque) +{ + clk->cb = cb; + clk->opaque = opaque; +} + void qemu_clk_attach_to_device(DeviceState *d, qemu_clk clk, const char *name) { assert(name);