7  * See the COPYING file in the top-level directory.
9  * This driver provides the minimum functionality to initialize and seed
15 #include "qemu/main-loop.h"
17 #include "qemu/guest-random.h"
45 /* the current status for self-test and seed operations */
61         if (s->op_seed == OP_RUN) {  in imx_rngc_read()
64         if (s->op_self_test == OP_RUN) {  in imx_rngc_read()
74         val |= s->mask;  in imx_rngc_read()
75         if (s->auto_seed) {  in imx_rngc_read()
87          * We never report any statistics test or self-test errors or any  in imx_rngc_read()
93          * report back the default fifo size (5 32-bit words) and  in imx_rngc_read()
98         /* We always have a new seed available. */  in imx_rngc_read()
101         if (s->op_seed == OP_DONE) {  in imx_rngc_read()
104         if (s->op_self_test == OP_DONE) {  in imx_rngc_read()
107         if (s->op_seed == OP_RUN || s->op_self_test == OP_RUN) {  in imx_rngc_read()
109              * We're busy if self-test is running or if we're  in imx_rngc_read()
132     s->op_self_test = OP_IDLE;  in imx_rngc_do_reset()
133     s->op_seed = OP_IDLE;  in imx_rngc_do_reset()
134     s->mask = 0;  in imx_rngc_do_reset()
135     s->auto_seed = false;  in imx_rngc_do_reset()
154             qemu_irq_lower(s->irq);  in imx_rngc_write()
158             s->op_seed = OP_RUN;  in imx_rngc_write()
159             qemu_bh_schedule(s->seed_bh);  in imx_rngc_write()
163             s->op_self_test = OP_RUN;  in imx_rngc_write()
164             qemu_bh_schedule(s->self_test_bh);  in imx_rngc_write()
175             s->mask |= RNGC_CTRL_BIT_MASK_ERR;  in imx_rngc_write()
177             s->mask &= ~RNGC_CTRL_BIT_MASK_ERR;  in imx_rngc_write()
181             s->mask |= RNGC_CTRL_BIT_MASK_DONE;  in imx_rngc_write()
183             s->mask &= ~RNGC_CTRL_BIT_MASK_DONE;  in imx_rngc_write()
187             s->auto_seed = true;  in imx_rngc_write()
189             s->auto_seed = false;  in imx_rngc_write()
205     s->op_self_test = OP_DONE;  in imx_rngc_self_test()
206     if (!(s->mask & RNGC_CTRL_BIT_MASK_DONE)) {  in imx_rngc_self_test()
207         qemu_irq_raise(s->irq);  in imx_rngc_self_test()
215     s->op_seed = OP_DONE;  in imx_rngc_seed()
216     if (!(s->mask & RNGC_CTRL_BIT_MASK_DONE)) {  in imx_rngc_seed()
217         qemu_irq_raise(s->irq);  in imx_rngc_seed()
226     memory_region_init_io(&s->iomem, OBJECT(s), &imx_rngc_ops, s,  in imx_rngc_realize()
228     sysbus_init_mmio(sbd, &s->iomem);  in imx_rngc_realize()
230     sysbus_init_irq(sbd, &s->irq);  in imx_rngc_realize()
231     s->self_test_bh = qemu_bh_new_guarded(imx_rngc_self_test, s,  in imx_rngc_realize()
232                                           &dev->mem_reentrancy_guard);  in imx_rngc_realize()
233     s->seed_bh = qemu_bh_new_guarded(imx_rngc_seed, s,  in imx_rngc_realize()
234                                      &dev->mem_reentrancy_guard);  in imx_rngc_realize()
261     dc->realize = imx_rngc_realize;  in imx_rngc_class_init()
263     dc->desc = RNGC_NAME,  in imx_rngc_class_init()
264     dc->vmsd = &vmstate_imx_rngc;  in imx_rngc_class_init()