Implement time-base start/stop helpers.
Implement PowerPC 6xx time-base enable input pin. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3394 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
j_mayer
parent
d68f13063b
commit
dbdd25065e
113
hw/ppc.c
113
hw/ppc.c
@ -30,6 +30,9 @@
|
||||
extern FILE *logfile;
|
||||
extern int loglevel;
|
||||
|
||||
static void cpu_ppc_tb_stop (CPUState *env);
|
||||
static void cpu_ppc_tb_start (CPUState *env);
|
||||
|
||||
static void ppc_set_irq (CPUState *env, int n_IRQ, int level)
|
||||
{
|
||||
if (level) {
|
||||
@ -65,6 +68,19 @@ static void ppc6xx_set_irq (void *opaque, int pin, int level)
|
||||
/* Don't generate spurious events */
|
||||
if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
|
||||
switch (pin) {
|
||||
case PPC6xx_INPUT_TBEN:
|
||||
/* Level sensitive - active high */
|
||||
#if defined(PPC_DEBUG_IRQ)
|
||||
if (loglevel & CPU_LOG_INT) {
|
||||
fprintf(logfile, "%s: %s the time base\n",
|
||||
__func__, level ? "start" : "stop");
|
||||
}
|
||||
#endif
|
||||
if (level) {
|
||||
cpu_ppc_tb_start(env);
|
||||
} else {
|
||||
cpu_ppc_tb_stop(env);
|
||||
}
|
||||
case PPC6xx_INPUT_INT:
|
||||
/* Level sensitive - active high */
|
||||
#if defined(PPC_DEBUG_IRQ)
|
||||
@ -407,6 +423,7 @@ struct ppc_tb_t {
|
||||
uint32_t tb_freq; /* TB frequency */
|
||||
/* Decrementer management */
|
||||
uint64_t decr_next; /* Tick for next decr interrupt */
|
||||
uint32_t decr_freq; /* decrementer frequency */
|
||||
struct QEMUTimer *decr_timer;
|
||||
#if defined(TARGET_PPC64H)
|
||||
/* Hypervisor decrementer management */
|
||||
@ -418,12 +435,11 @@ struct ppc_tb_t {
|
||||
void *opaque;
|
||||
};
|
||||
|
||||
static always_inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env,
|
||||
static always_inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env, uint64_t vmclk,
|
||||
int64_t tb_offset)
|
||||
{
|
||||
/* TB time in tb periods */
|
||||
return muldiv64(qemu_get_clock(vm_clock) + tb_env->tb_offset,
|
||||
tb_env->tb_freq, ticks_per_sec);
|
||||
return muldiv64(vmclk, tb_env->tb_freq, ticks_per_sec) + tb_offset;
|
||||
}
|
||||
|
||||
uint32_t cpu_ppc_load_tbl (CPUState *env)
|
||||
@ -431,7 +447,7 @@ uint32_t cpu_ppc_load_tbl (CPUState *env)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
|
||||
#if defined(PPC_DEBUG_TB)
|
||||
if (loglevel != 0) {
|
||||
fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
|
||||
@ -446,7 +462,7 @@ static always_inline uint32_t _cpu_ppc_load_tbu (CPUState *env)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
|
||||
#if defined(PPC_DEBUG_TB)
|
||||
if (loglevel != 0) {
|
||||
fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
|
||||
@ -461,12 +477,11 @@ uint32_t cpu_ppc_load_tbu (CPUState *env)
|
||||
return _cpu_ppc_load_tbu(env);
|
||||
}
|
||||
|
||||
static always_inline void cpu_ppc_store_tb (ppc_tb_t *tb_env,
|
||||
static always_inline void cpu_ppc_store_tb (ppc_tb_t *tb_env, uint64_t vmclk,
|
||||
int64_t *tb_offsetp,
|
||||
uint64_t value)
|
||||
{
|
||||
*tb_offsetp = muldiv64(value, ticks_per_sec, tb_env->tb_freq)
|
||||
- qemu_get_clock(vm_clock);
|
||||
*tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, ticks_per_sec);
|
||||
#ifdef PPC_DEBUG_TB
|
||||
if (loglevel != 0) {
|
||||
fprintf(logfile, "%s: tb=0x%016lx offset=%08lx\n", __func__, value,
|
||||
@ -480,9 +495,10 @@ void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
|
||||
tb &= 0xFFFFFFFF00000000ULL;
|
||||
cpu_ppc_store_tb(tb_env, &tb_env->tb_offset, tb | (uint64_t)value);
|
||||
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
|
||||
&tb_env->tb_offset, tb | (uint64_t)value);
|
||||
}
|
||||
|
||||
static always_inline void _cpu_ppc_store_tbu (CPUState *env, uint32_t value)
|
||||
@ -490,10 +506,10 @@ static always_inline void _cpu_ppc_store_tbu (CPUState *env, uint32_t value)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
|
||||
tb &= 0x00000000FFFFFFFFULL;
|
||||
cpu_ppc_store_tb(tb_env, &tb_env->tb_offset,
|
||||
((uint64_t)value << 32) | tb);
|
||||
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
|
||||
&tb_env->tb_offset, ((uint64_t)value << 32) | tb);
|
||||
}
|
||||
|
||||
void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
|
||||
@ -506,7 +522,7 @@ uint32_t cpu_ppc_load_atbl (CPUState *env)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
|
||||
#if defined(PPC_DEBUG_TB)
|
||||
if (loglevel != 0) {
|
||||
fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
|
||||
@ -521,7 +537,7 @@ uint32_t cpu_ppc_load_atbu (CPUState *env)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
|
||||
#if defined(PPC_DEBUG_TB)
|
||||
if (loglevel != 0) {
|
||||
fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
|
||||
@ -536,9 +552,10 @@ void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
|
||||
tb &= 0xFFFFFFFF00000000ULL;
|
||||
cpu_ppc_store_tb(tb_env, &tb_env->atb_offset, tb | (uint64_t)value);
|
||||
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
|
||||
&tb_env->atb_offset, tb | (uint64_t)value);
|
||||
}
|
||||
|
||||
void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
|
||||
@ -546,10 +563,53 @@ void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb;
|
||||
|
||||
tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
|
||||
tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
|
||||
tb &= 0x00000000FFFFFFFFULL;
|
||||
cpu_ppc_store_tb(tb_env, &tb_env->atb_offset,
|
||||
((uint64_t)value << 32) | tb);
|
||||
cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
|
||||
&tb_env->atb_offset, ((uint64_t)value << 32) | tb);
|
||||
}
|
||||
|
||||
static void cpu_ppc_tb_stop (CPUState *env)
|
||||
{
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb, atb, vmclk;
|
||||
|
||||
/* If the time base is already frozen, do nothing */
|
||||
if (tb_env->tb_freq != 0) {
|
||||
vmclk = qemu_get_clock(vm_clock);
|
||||
/* Get the time base */
|
||||
tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset);
|
||||
/* Get the alternate time base */
|
||||
atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset);
|
||||
/* Store the time base value (ie compute the current offset) */
|
||||
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
|
||||
/* Store the alternate time base value (compute the current offset) */
|
||||
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
|
||||
/* Set the time base frequency to zero */
|
||||
tb_env->tb_freq = 0;
|
||||
/* Now, the time bases are frozen to tb_offset / atb_offset value */
|
||||
}
|
||||
}
|
||||
|
||||
static void cpu_ppc_tb_start (CPUState *env)
|
||||
{
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
uint64_t tb, atb, vmclk;
|
||||
|
||||
/* If the time base is not frozen, do nothing */
|
||||
if (tb_env->tb_freq == 0) {
|
||||
vmclk = qemu_get_clock(vm_clock);
|
||||
/* Get the time base from tb_offset */
|
||||
tb = tb_env->tb_offset;
|
||||
/* Get the alternate time base from atb_offset */
|
||||
atb = tb_env->atb_offset;
|
||||
/* Restore the tb frequency from the decrementer frequency */
|
||||
tb_env->tb_freq = tb_env->decr_freq;
|
||||
/* Store the time base value */
|
||||
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
|
||||
/* Store the alternate time base value */
|
||||
cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
|
||||
}
|
||||
}
|
||||
|
||||
static always_inline uint32_t _cpu_ppc_load_decr (CPUState *env,
|
||||
@ -561,9 +621,9 @@ static always_inline uint32_t _cpu_ppc_load_decr (CPUState *env,
|
||||
|
||||
diff = tb_env->decr_next - qemu_get_clock(vm_clock);
|
||||
if (diff >= 0)
|
||||
decr = muldiv64(diff, tb_env->tb_freq, ticks_per_sec);
|
||||
decr = muldiv64(diff, tb_env->decr_freq, ticks_per_sec);
|
||||
else
|
||||
decr = -muldiv64(-diff, tb_env->tb_freq, ticks_per_sec);
|
||||
decr = -muldiv64(-diff, tb_env->decr_freq, ticks_per_sec);
|
||||
#if defined(PPC_DEBUG_TB)
|
||||
if (loglevel != 0) {
|
||||
fprintf(logfile, "%s: 0x%08x\n", __func__, decr);
|
||||
@ -639,7 +699,7 @@ static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp,
|
||||
}
|
||||
#endif
|
||||
now = qemu_get_clock(vm_clock);
|
||||
next = now + muldiv64(value, ticks_per_sec, tb_env->tb_freq);
|
||||
next = now + muldiv64(value, ticks_per_sec, tb_env->decr_freq);
|
||||
if (is_excp)
|
||||
next += *nextp - now;
|
||||
if (next == now)
|
||||
@ -708,6 +768,7 @@ static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
|
||||
ppc_tb_t *tb_env = env->tb_env;
|
||||
|
||||
tb_env->tb_freq = freq;
|
||||
tb_env->decr_freq = freq;
|
||||
/* There is a bug in Linux 2.4 kernels:
|
||||
* if a decrementer exception is pending when it enables msr_ee at startup,
|
||||
* it's not ready to handle it...
|
||||
@ -848,7 +909,7 @@ static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp)
|
||||
#endif
|
||||
now = qemu_get_clock(vm_clock);
|
||||
next = now + muldiv64(ppcemb_timer->pit_reload,
|
||||
ticks_per_sec, tb_env->tb_freq);
|
||||
ticks_per_sec, tb_env->decr_freq);
|
||||
if (is_excp)
|
||||
next += tb_env->decr_next - now;
|
||||
if (next == now)
|
||||
@ -912,7 +973,7 @@ static void cpu_4xx_wdt_cb (void *opaque)
|
||||
/* Cannot occur, but makes gcc happy */
|
||||
return;
|
||||
}
|
||||
next = now + muldiv64(next, ticks_per_sec, tb_env->tb_freq);
|
||||
next = now + muldiv64(next, ticks_per_sec, tb_env->decr_freq);
|
||||
if (next == now)
|
||||
next++;
|
||||
#ifdef PPC_DEBUG_TB
|
||||
@ -1014,6 +1075,7 @@ static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq)
|
||||
}
|
||||
#endif
|
||||
tb_env->tb_freq = freq;
|
||||
tb_env->decr_freq = freq;
|
||||
/* XXX: we should also update all timers */
|
||||
}
|
||||
|
||||
@ -1029,6 +1091,7 @@ clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq)
|
||||
env->tb_env = tb_env;
|
||||
ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
|
||||
tb_env->tb_freq = freq;
|
||||
tb_env->decr_freq = freq;
|
||||
tb_env->opaque = ppcemb_timer;
|
||||
#ifdef PPC_DEBUG_TB
|
||||
if (loglevel != 0) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user