10
10
static uint32_t seed = 0;
12
12
seed = seed * 314159 + 1;
13
idx = (seed >> 16) % (env->tlb->nb_tlb - env->CP0_Wired) + env->CP0_Wired;
13
idx = (seed >> 16) % (env->nb_tlb - env->CP0_Wired) + env->CP0_Wired;
17
17
/* MIPS R4K timer */
18
18
uint32_t cpu_mips_get_count (CPUState *env)
20
if (env->CP0_Cause & (1 << CP0Ca_DC))
21
return env->CP0_Count;
23
return env->CP0_Count +
24
(uint32_t)muldiv64(qemu_get_clock(vm_clock),
25
TIMER_FREQ, ticks_per_sec);
20
return env->CP0_Count +
21
(uint32_t)muldiv64(qemu_get_clock(vm_clock),
22
100 * 1000 * 1000, ticks_per_sec);
28
static void cpu_mips_timer_update(CPUState *env)
25
void cpu_mips_store_count (CPUState *env, uint32_t count)
30
27
uint64_t now, next;
29
uint32_t compare = env->CP0_Compare;
33
34
now = qemu_get_clock(vm_clock);
34
wait = env->CP0_Compare - env->CP0_Count -
35
(uint32_t)muldiv64(now, TIMER_FREQ, ticks_per_sec);
36
next = now + muldiv64(wait, ticks_per_sec, TIMER_FREQ);
35
next = now + muldiv64(compare - tmp, ticks_per_sec, 100 * 1000 * 1000);
40
fprintf(logfile, "%s: 0x%08" PRIx64 " %08x %08x => 0x%08" PRIx64 "\n",
41
__func__, now, count, compare, next - now);
44
/* Store new count and compare registers */
45
env->CP0_Compare = compare;
47
count - (uint32_t)muldiv64(now, 100 * 1000 * 1000, ticks_per_sec);
37
49
qemu_mod_timer(env->timer, next);
40
void cpu_mips_store_count (CPUState *env, uint32_t count)
52
static void cpu_mips_update_count (CPUState *env, uint32_t count)
42
54
if (env->CP0_Cause & (1 << CP0Ca_DC))
43
env->CP0_Count = count;
45
/* Store new count register */
47
count - (uint32_t)muldiv64(qemu_get_clock(vm_clock),
48
TIMER_FREQ, ticks_per_sec);
49
/* Update timer timer */
50
cpu_mips_timer_update(env);
57
cpu_mips_store_count(env, count);
54
60
void cpu_mips_store_compare (CPUState *env, uint32_t value)
56
62
env->CP0_Compare = value;
57
if (!(env->CP0_Cause & (1 << CP0Ca_DC)))
58
cpu_mips_timer_update(env);
59
if (env->insn_flags & ISA_MIPS32R2)
63
cpu_mips_update_count(env, cpu_mips_get_count(env));
64
if ((env->CP0_Config0 & (0x7 << CP0C0_AR)) == (1 << CP0C0_AR))
60
65
env->CP0_Cause &= ~(1 << CP0Ca_TI);
61
qemu_irq_lower(env->irq[(env->CP0_IntCtl >> CP0IntCtl_IPTI) & 0x7]);
64
void cpu_mips_start_count(CPUState *env)
66
cpu_mips_store_count(env, env->CP0_Count);
69
void cpu_mips_stop_count(CPUState *env)
71
/* Store the current value */
72
env->CP0_Count += (uint32_t)muldiv64(qemu_get_clock(vm_clock),
73
TIMER_FREQ, ticks_per_sec);
66
qemu_irq_lower(env->irq[7]);
76
69
static void mips_timer_cb (void *opaque)
83
76
fprintf(logfile, "%s\n", __func__);
87
if (env->CP0_Cause & (1 << CP0Ca_DC))
90
/* ??? This callback should occur when the counter is exactly equal to
91
the comparator value. Offset the count by one to avoid immediately
92
retriggering the callback before any virtual time has passed. */
94
cpu_mips_timer_update(env);
96
if (env->insn_flags & ISA_MIPS32R2)
79
cpu_mips_update_count(env, cpu_mips_get_count(env));
80
if ((env->CP0_Config0 & (0x7 << CP0C0_AR)) == (1 << CP0C0_AR))
97
81
env->CP0_Cause |= 1 << CP0Ca_TI;
98
qemu_irq_raise(env->irq[(env->CP0_IntCtl >> CP0IntCtl_IPTI) & 0x7]);
82
qemu_irq_raise(env->irq[7]);
101
85
void cpu_mips_clock_init (CPUState *env)
103
87
env->timer = qemu_new_timer(vm_clock, &mips_timer_cb, env);
104
88
env->CP0_Compare = 0;
105
cpu_mips_store_count(env, 1);
89
cpu_mips_update_count(env, 1);