25 #include "qemu/guest-random.h"
76     /* bits from 0 to EXYNOS4210_RNG_PRNG_NUM if given seed register was set */
88     /* Return true if all the seed-set bits are set. */  in exynos4210_rng_seed_ready()
89     return (s->seed_set & mask) == mask;  in exynos4210_rng_seed_ready()
96      * We actually ignore the seed and always generate true random numbers.  in exynos4210_rng_set_seed()
99      * generates random numbers regardless of the seed value.  in exynos4210_rng_set_seed()
101     s->seed_set |= BIT(i);  in exynos4210_rng_set_seed()
105         s->reg_status |= EXYNOS4210_RNG_STATUS_SEED_SETTING_DONE;  in exynos4210_rng_set_seed()
107         s->reg_status &= ~EXYNOS4210_RNG_STATUS_SEED_SETTING_DONE;  in exynos4210_rng_set_seed()
115     /* Seed set? */  in exynos4210_rng_run_engine()
116     if ((s->reg_status & EXYNOS4210_RNG_STATUS_SEED_SETTING_DONE) == 0) {  in exynos4210_rng_run_engine()
121     if ((s->reg_control & EXYNOS4210_RNG_CONTROL_1_PRNG) == 0) {  in exynos4210_rng_run_engine()
126     if ((s->reg_control & EXYNOS4210_RNG_CONTROL_1_START_INIT) == 0) {  in exynos4210_rng_run_engine()
131     if (qemu_guest_getrandom(s->randr_value, sizeof(s->randr_value), &err)) {  in exynos4210_rng_run_engine()
135         s->reg_status |= EXYNOS4210_RNG_STATUS_PRNG_DONE;  in exynos4210_rng_run_engine()
140     s->reg_control &= ~EXYNOS4210_RNG_CONTROL_1_START_INIT;  in exynos4210_rng_run_engine()
153         val = s->reg_control;  in exynos4210_rng_read()
157         val = s->reg_status;  in exynos4210_rng_read()
165         val = s->randr_value[(offset - EXYNOS4210_RNG_PRNG_OFFSET(0)) / 4];  in exynos4210_rng_read()
189         s->reg_control = val;  in exynos4210_rng_write()
195         s->reg_status &= ~EXYNOS4210_RNG_STATUS_WRITE_MASK;  in exynos4210_rng_write()
196         s->reg_status |= val & EXYNOS4210_RNG_STATUS_WRITE_MASK;  in exynos4210_rng_write()
205                                 (offset - EXYNOS4210_RNG_SEED_IN_OFFSET(0)) / 4,  in exynos4210_rng_write()
228     s->reg_control = 0;  in exynos4210_rng_reset()
229     s->reg_status = EXYNOS4210_RNG_STATUS_BUFFER_READY;  in exynos4210_rng_reset()
230     memset(s->randr_value, 0, sizeof(s->randr_value));  in exynos4210_rng_reset()
231     s->seed_set = 0;  in exynos4210_rng_reset()
239     memory_region_init_io(&s->iomem, obj, &exynos4210_rng_ops, s,  in exynos4210_rng_init()
241     sysbus_init_mmio(dev, &s->iomem);  in exynos4210_rng_init()
263     dc->vmsd = &exynos4210_rng_vmstate;  in exynos4210_rng_class_init()