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qemu/hw/ppc/ppc.c
Greg Kurz e703d2f71c ppc: parse cpu features once 
Considering that features are converted to global properties and
global properties are automatically applied to every new instance
of created CPU (at object_new() time), there is no point in
parsing cpu_model string every time a CPU created. So move
parsing outside CPU creation loop and do it only once.

Parsing also should be done before any CPU is created so that
features would affect the first CPU a well.

This patch does that for all PowerPC machine types.

It is based on previous work from Bharata:

https://lists.nongnu.org/archive/html/qemu-devel/2016-06/msg07564.html

Signed-off-by: Greg Kurz <groug@kaod.org>
[clg: only kept the fix for the spapr platform. support for other
      platform will be added in 2.8 ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2016-08-13 17:32:58 +10:00

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/*
* QEMU generic PowerPC hardware System Emulator
*
* Copyright (c) 2003-2007 Jocelyn Mayer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/hw.h"
#include "hw/ppc/ppc.h"
#include "hw/ppc/ppc_e500.h"
#include "qemu/timer.h"
#include "sysemu/sysemu.h"
#include "sysemu/cpus.h"
#include "hw/timer/m48t59.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/loader.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "trace.h"
//#define PPC_DEBUG_IRQ
//#define PPC_DEBUG_TB
#ifdef PPC_DEBUG_IRQ
# define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
#else
# define LOG_IRQ(...) do { } while (0)
#endif
#ifdef PPC_DEBUG_TB
# define LOG_TB(...) qemu_log(__VA_ARGS__)
#else
# define LOG_TB(...) do { } while (0)
#endif
static void cpu_ppc_tb_stop (CPUPPCState *env);
static void cpu_ppc_tb_start (CPUPPCState *env);
void ppc_set_irq(PowerPCCPU *cpu, int n_IRQ, int level)
{
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
unsigned int old_pending = env->pending_interrupts;
if (level) {
env->pending_interrupts |= 1 << n_IRQ;
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
} else {
env->pending_interrupts &= ~(1 << n_IRQ);
if (env->pending_interrupts == 0) {
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
}
if (old_pending != env->pending_interrupts) {
#ifdef CONFIG_KVM
kvmppc_set_interrupt(cpu, n_IRQ, level);
#endif
}
LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
"req %08x\n", __func__, env, n_IRQ, level,
env->pending_interrupts, CPU(cpu)->interrupt_request);
}
/* PowerPC 6xx / 7xx internal IRQ controller */
static void ppc6xx_set_irq(void *opaque, int pin, int level)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
int cur_level;
LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
env, pin, level);
cur_level = (env->irq_input_state >> pin) & 1;
/* Don't generate spurious events */
if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
CPUState *cs = CPU(cpu);
switch (pin) {
case PPC6xx_INPUT_TBEN:
/* Level sensitive - active high */
LOG_IRQ("%s: %s the time base\n",
__func__, level ? "start" : "stop");
if (level) {
cpu_ppc_tb_start(env);
} else {
cpu_ppc_tb_stop(env);
}
case PPC6xx_INPUT_INT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the external IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
break;
case PPC6xx_INPUT_SMI:
/* Level sensitive - active high */
LOG_IRQ("%s: set the SMI IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_SMI, level);
break;
case PPC6xx_INPUT_MCP:
/* Negative edge sensitive */
/* XXX: TODO: actual reaction may depends on HID0 status
* 603/604/740/750: check HID0[EMCP]
*/
if (cur_level == 1 && level == 0) {
LOG_IRQ("%s: raise machine check state\n",
__func__);
ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1);
}
break;
case PPC6xx_INPUT_CKSTP_IN:
/* Level sensitive - active low */
/* XXX: TODO: relay the signal to CKSTP_OUT pin */
/* XXX: Note that the only way to restart the CPU is to reset it */
if (level) {
LOG_IRQ("%s: stop the CPU\n", __func__);
cs->halted = 1;
}
break;
case PPC6xx_INPUT_HRESET:
/* Level sensitive - active low */
if (level) {
LOG_IRQ("%s: reset the CPU\n", __func__);
cpu_interrupt(cs, CPU_INTERRUPT_RESET);
}
break;
case PPC6xx_INPUT_SRESET:
LOG_IRQ("%s: set the RESET IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level);
break;
default:
/* Unknown pin - do nothing */
LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
return;
}
if (level)
env->irq_input_state |= 1 << pin;
else
env->irq_input_state &= ~(1 << pin);
}
}
void ppc6xx_irq_init(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, cpu,
PPC6xx_INPUT_NB);
}
#if defined(TARGET_PPC64)
/* PowerPC 970 internal IRQ controller */
static void ppc970_set_irq(void *opaque, int pin, int level)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
int cur_level;
LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
env, pin, level);
cur_level = (env->irq_input_state >> pin) & 1;
/* Don't generate spurious events */
if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
CPUState *cs = CPU(cpu);
switch (pin) {
case PPC970_INPUT_INT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the external IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
break;
case PPC970_INPUT_THINT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
level);
ppc_set_irq(cpu, PPC_INTERRUPT_THERM, level);
break;
case PPC970_INPUT_MCP:
/* Negative edge sensitive */
/* XXX: TODO: actual reaction may depends on HID0 status
* 603/604/740/750: check HID0[EMCP]
*/
if (cur_level == 1 && level == 0) {
LOG_IRQ("%s: raise machine check state\n",
__func__);
ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1);
}
break;
case PPC970_INPUT_CKSTP:
/* Level sensitive - active low */
/* XXX: TODO: relay the signal to CKSTP_OUT pin */
if (level) {
LOG_IRQ("%s: stop the CPU\n", __func__);
cs->halted = 1;
} else {
LOG_IRQ("%s: restart the CPU\n", __func__);
cs->halted = 0;
qemu_cpu_kick(cs);
}
break;
case PPC970_INPUT_HRESET:
/* Level sensitive - active low */
if (level) {
cpu_interrupt(cs, CPU_INTERRUPT_RESET);
}
break;
case PPC970_INPUT_SRESET:
LOG_IRQ("%s: set the RESET IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level);
break;
case PPC970_INPUT_TBEN:
LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
level);
/* XXX: TODO */
break;
default:
/* Unknown pin - do nothing */
LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
return;
}
if (level)
env->irq_input_state |= 1 << pin;
else
env->irq_input_state &= ~(1 << pin);
}
}
void ppc970_irq_init(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, cpu,
PPC970_INPUT_NB);
}
/* POWER7 internal IRQ controller */
static void power7_set_irq(void *opaque, int pin, int level)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
env, pin, level);
switch (pin) {
case POWER7_INPUT_INT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the external IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
break;
default:
/* Unknown pin - do nothing */
LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
return;
}
if (level) {
env->irq_input_state |= 1 << pin;
} else {
env->irq_input_state &= ~(1 << pin);
}
}
void ppcPOWER7_irq_init(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
env->irq_inputs = (void **)qemu_allocate_irqs(&power7_set_irq, cpu,
POWER7_INPUT_NB);
}
#endif /* defined(TARGET_PPC64) */
/* PowerPC 40x internal IRQ controller */
static void ppc40x_set_irq(void *opaque, int pin, int level)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
int cur_level;
LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
env, pin, level);
cur_level = (env->irq_input_state >> pin) & 1;
/* Don't generate spurious events */
if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
CPUState *cs = CPU(cpu);
switch (pin) {
case PPC40x_INPUT_RESET_SYS:
if (level) {
LOG_IRQ("%s: reset the PowerPC system\n",
__func__);
ppc40x_system_reset(cpu);
}
break;
case PPC40x_INPUT_RESET_CHIP:
if (level) {
LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
ppc40x_chip_reset(cpu);
}
break;
case PPC40x_INPUT_RESET_CORE:
/* XXX: TODO: update DBSR[MRR] */
if (level) {
LOG_IRQ("%s: reset the PowerPC core\n", __func__);
ppc40x_core_reset(cpu);
}
break;
case PPC40x_INPUT_CINT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the critical IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level);
break;
case PPC40x_INPUT_INT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the external IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
break;
case PPC40x_INPUT_HALT:
/* Level sensitive - active low */
if (level) {
LOG_IRQ("%s: stop the CPU\n", __func__);
cs->halted = 1;
} else {
LOG_IRQ("%s: restart the CPU\n", __func__);
cs->halted = 0;
qemu_cpu_kick(cs);
}
break;
case PPC40x_INPUT_DEBUG:
/* Level sensitive - active high */
LOG_IRQ("%s: set the debug pin state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level);
break;
default:
/* Unknown pin - do nothing */
LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
return;
}
if (level)
env->irq_input_state |= 1 << pin;
else
env->irq_input_state &= ~(1 << pin);
}
}
void ppc40x_irq_init(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
cpu, PPC40x_INPUT_NB);
}
/* PowerPC E500 internal IRQ controller */
static void ppce500_set_irq(void *opaque, int pin, int level)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
int cur_level;
LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
env, pin, level);
cur_level = (env->irq_input_state >> pin) & 1;
/* Don't generate spurious events */
if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
switch (pin) {
case PPCE500_INPUT_MCK:
if (level) {
LOG_IRQ("%s: reset the PowerPC system\n",
__func__);
qemu_system_reset_request();
}
break;
case PPCE500_INPUT_RESET_CORE:
if (level) {
LOG_IRQ("%s: reset the PowerPC core\n", __func__);
ppc_set_irq(cpu, PPC_INTERRUPT_MCK, level);
}
break;
case PPCE500_INPUT_CINT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the critical IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level);
break;
case PPCE500_INPUT_INT:
/* Level sensitive - active high */
LOG_IRQ("%s: set the core IRQ state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
break;
case PPCE500_INPUT_DEBUG:
/* Level sensitive - active high */
LOG_IRQ("%s: set the debug pin state to %d\n",
__func__, level);
ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level);
break;
default:
/* Unknown pin - do nothing */
LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
return;
}
if (level)
env->irq_input_state |= 1 << pin;
else
env->irq_input_state &= ~(1 << pin);
}
}
void ppce500_irq_init(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
cpu, PPCE500_INPUT_NB);
}
/* Enable or Disable the E500 EPR capability */
void ppce500_set_mpic_proxy(bool enabled)
{
CPUState *cs;
CPU_FOREACH(cs) {
PowerPCCPU *cpu = POWERPC_CPU(cs);
cpu->env.mpic_proxy = enabled;
if (kvm_enabled()) {
kvmppc_set_mpic_proxy(cpu, enabled);
}
}
}
/*****************************************************************************/
/* PowerPC time base and decrementer emulation */
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(vmclk, tb_env->tb_freq, NANOSECONDS_PER_SECOND) + tb_offset;
}
uint64_t cpu_ppc_load_tbl (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
if (kvm_enabled()) {
return env->spr[SPR_TBL];
}
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
return tb;
}
static inline uint32_t _cpu_ppc_load_tbu(CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
return tb >> 32;
}
uint32_t cpu_ppc_load_tbu (CPUPPCState *env)
{
if (kvm_enabled()) {
return env->spr[SPR_TBU];
}
return _cpu_ppc_load_tbu(env);
}
static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk,
int64_t *tb_offsetp, uint64_t value)
{
*tb_offsetp = value -
muldiv64(vmclk, tb_env->tb_freq, NANOSECONDS_PER_SECOND);
LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
__func__, value, *tb_offsetp);
}
void cpu_ppc_store_tbl (CPUPPCState *env, uint32_t value)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
tb &= 0xFFFFFFFF00000000ULL;
cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
&tb_env->tb_offset, tb | (uint64_t)value);
}
static inline void _cpu_ppc_store_tbu(CPUPPCState *env, uint32_t value)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
tb &= 0x00000000FFFFFFFFULL;
cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
&tb_env->tb_offset, ((uint64_t)value << 32) | tb);
}
void cpu_ppc_store_tbu (CPUPPCState *env, uint32_t value)
{
_cpu_ppc_store_tbu(env, value);
}
uint64_t cpu_ppc_load_atbl (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
return tb;
}
uint32_t cpu_ppc_load_atbu (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
return tb >> 32;
}
void cpu_ppc_store_atbl (CPUPPCState *env, uint32_t value)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
tb &= 0xFFFFFFFF00000000ULL;
cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
&tb_env->atb_offset, tb | (uint64_t)value);
}
void cpu_ppc_store_atbu (CPUPPCState *env, uint32_t value)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t tb;
tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
tb &= 0x00000000FFFFFFFFULL;
cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
&tb_env->atb_offset, ((uint64_t)value << 32) | tb);
}
static void cpu_ppc_tb_stop (CPUPPCState *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_clock_get_ns(QEMU_CLOCK_VIRTUAL);
/* 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 (CPUPPCState *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_clock_get_ns(QEMU_CLOCK_VIRTUAL);
/* 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);
}
}
bool ppc_decr_clear_on_delivery(CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
int flags = PPC_DECR_UNDERFLOW_TRIGGERED | PPC_DECR_UNDERFLOW_LEVEL;
return ((tb_env->flags & flags) == PPC_DECR_UNDERFLOW_TRIGGERED);
}
static inline uint32_t _cpu_ppc_load_decr(CPUPPCState *env, uint64_t next)
{
ppc_tb_t *tb_env = env->tb_env;
uint32_t decr;
int64_t diff;
diff = next - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
if (diff >= 0) {
decr = muldiv64(diff, tb_env->decr_freq, NANOSECONDS_PER_SECOND);
} else if (tb_env->flags & PPC_TIMER_BOOKE) {
decr = 0;
} else {
decr = -muldiv64(-diff, tb_env->decr_freq, NANOSECONDS_PER_SECOND);
}
LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
return decr;
}
uint32_t cpu_ppc_load_decr (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
if (kvm_enabled()) {
return env->spr[SPR_DECR];
}
return _cpu_ppc_load_decr(env, tb_env->decr_next);
}
uint32_t cpu_ppc_load_hdecr (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
return _cpu_ppc_load_decr(env, tb_env->hdecr_next);
}
uint64_t cpu_ppc_load_purr (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
uint64_t diff;
diff = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - tb_env->purr_start;
return tb_env->purr_load +
muldiv64(diff, tb_env->tb_freq, NANOSECONDS_PER_SECOND);
}
/* When decrementer expires,
* all we need to do is generate or queue a CPU exception
*/
static inline void cpu_ppc_decr_excp(PowerPCCPU *cpu)
{
/* Raise it */
LOG_TB("raise decrementer exception\n");
ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 1);
}
static inline void cpu_ppc_decr_lower(PowerPCCPU *cpu)
{
ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 0);
}
static inline void cpu_ppc_hdecr_excp(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
/* Raise it */
LOG_TB("raise hv decrementer exception\n");
/* The architecture specifies that we don't deliver HDEC
* interrupts in a PM state. Not only they don't cause a
* wakeup but they also get effectively discarded.
*/
if (!env->in_pm_state) {
ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1);
}
}
static inline void cpu_ppc_hdecr_lower(PowerPCCPU *cpu)
{
ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 0);
}
static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp,
QEMUTimer *timer,
void (*raise_excp)(void *),
void (*lower_excp)(PowerPCCPU *),
uint32_t decr, uint32_t value)
{
CPUPPCState *env = &cpu->env;
ppc_tb_t *tb_env = env->tb_env;
uint64_t now, next;
LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
decr, value);
if (kvm_enabled()) {
/* KVM handles decrementer exceptions, we don't need our own timer */
return;
}
/*
* Going from 2 -> 1, 1 -> 0 or 0 -> -1 is the event to generate a DEC
* interrupt.
*
* If we get a really small DEC value, we can assume that by the time we
* handled it we should inject an interrupt already.
*
* On MSB level based DEC implementations the MSB always means the interrupt
* is pending, so raise it on those.
*
* On MSB edge based DEC implementations the MSB going from 0 -> 1 triggers
* an edge interrupt, so raise it here too.
*/
if ((value < 3) ||
((tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL) && (value & 0x80000000)) ||
((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) && (value & 0x80000000)
&& !(decr & 0x80000000))) {
(*raise_excp)(cpu);
return;
}
/* On MSB level based systems a 0 for the MSB stops interrupt delivery */
if (!(value & 0x80000000) && (tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL)) {
(*lower_excp)(cpu);
}
/* Calculate the next timer event */
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
next = now + muldiv64(value, NANOSECONDS_PER_SECOND, tb_env->decr_freq);
*nextp = next;
/* Adjust timer */
timer_mod(timer, next);
}
static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu, uint32_t decr,
uint32_t value)
{
ppc_tb_t *tb_env = cpu->env.tb_env;
__cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer,
tb_env->decr_timer->cb, &cpu_ppc_decr_lower, decr,
value);
}
void cpu_ppc_store_decr (CPUPPCState *env, uint32_t value)
{
PowerPCCPU *cpu = ppc_env_get_cpu(env);
_cpu_ppc_store_decr(cpu, cpu_ppc_load_decr(env), value);
}
static void cpu_ppc_decr_cb(void *opaque)
{
PowerPCCPU *cpu = opaque;
cpu_ppc_decr_excp(cpu);
}
static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cpu, uint32_t hdecr,
uint32_t value)
{
ppc_tb_t *tb_env = cpu->env.tb_env;
if (tb_env->hdecr_timer != NULL) {
__cpu_ppc_store_decr(cpu, &tb_env->hdecr_next, tb_env->hdecr_timer,
tb_env->hdecr_timer->cb, &cpu_ppc_hdecr_lower,
hdecr, value);
}
}
void cpu_ppc_store_hdecr (CPUPPCState *env, uint32_t value)
{
PowerPCCPU *cpu = ppc_env_get_cpu(env);
_cpu_ppc_store_hdecr(cpu, cpu_ppc_load_hdecr(env), value);
}
static void cpu_ppc_hdecr_cb(void *opaque)
{
PowerPCCPU *cpu = opaque;
cpu_ppc_hdecr_excp(cpu);
}
static void cpu_ppc_store_purr(PowerPCCPU *cpu, uint64_t value)
{
ppc_tb_t *tb_env = cpu->env.tb_env;
tb_env->purr_load = value;
tb_env->purr_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
}
static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
{
CPUPPCState *env = opaque;
PowerPCCPU *cpu = ppc_env_get_cpu(env);
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...
*/
_cpu_ppc_store_decr(cpu, 0xFFFFFFFF, 0xFFFFFFFF);
_cpu_ppc_store_hdecr(cpu, 0xFFFFFFFF, 0xFFFFFFFF);
cpu_ppc_store_purr(cpu, 0x0000000000000000ULL);
}
static void timebase_pre_save(void *opaque)
{
PPCTimebase *tb = opaque;
uint64_t ticks = cpu_get_host_ticks();
PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
if (!first_ppc_cpu->env.tb_env) {
error_report("No timebase object");
return;
}
tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
/*
* tb_offset is only expected to be changed by migration so
* there is no need to update it from KVM here
*/
tb->guest_timebase = ticks + first_ppc_cpu->env.tb_env->tb_offset;
}
static int timebase_post_load(void *opaque, int version_id)
{
PPCTimebase *tb_remote = opaque;
CPUState *cpu;
PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
int64_t tb_off_adj, tb_off, ns_diff;
int64_t migration_duration_ns, migration_duration_tb, guest_tb, host_ns;
unsigned long freq;
if (!first_ppc_cpu->env.tb_env) {
error_report("No timebase object");
return -1;
}
freq = first_ppc_cpu->env.tb_env->tb_freq;
/*
* Calculate timebase on the destination side of migration.
* The destination timebase must be not less than the source timebase.
* We try to adjust timebase by downtime if host clocks are not
* too much out of sync (1 second for now).
*/
host_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
ns_diff = MAX(0, host_ns - tb_remote->time_of_the_day_ns);
migration_duration_ns = MIN(NANOSECONDS_PER_SECOND, ns_diff);
migration_duration_tb = muldiv64(freq, migration_duration_ns,
NANOSECONDS_PER_SECOND);
guest_tb = tb_remote->guest_timebase + MIN(0, migration_duration_tb);
tb_off_adj = guest_tb - cpu_get_host_ticks();
tb_off = first_ppc_cpu->env.tb_env->tb_offset;
trace_ppc_tb_adjust(tb_off, tb_off_adj, tb_off_adj - tb_off,
(tb_off_adj - tb_off) / freq);
/* Set new offset to all CPUs */
CPU_FOREACH(cpu) {
PowerPCCPU *pcpu = POWERPC_CPU(cpu);
pcpu->env.tb_env->tb_offset = tb_off_adj;
}
return 0;
}
const VMStateDescription vmstate_ppc_timebase = {
.name = "timebase",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.pre_save = timebase_pre_save,
.post_load = timebase_post_load,
.fields = (VMStateField []) {
VMSTATE_UINT64(guest_timebase, PPCTimebase),
VMSTATE_INT64(time_of_the_day_ns, PPCTimebase),
VMSTATE_END_OF_LIST()
},
};
/* Set up (once) timebase frequency (in Hz) */
clk_setup_cb cpu_ppc_tb_init (CPUPPCState *env, uint32_t freq)
{
PowerPCCPU *cpu = ppc_env_get_cpu(env);
ppc_tb_t *tb_env;
tb_env = g_malloc0(sizeof(ppc_tb_t));
env->tb_env = tb_env;
tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED;
if (env->insns_flags & PPC_SEGMENT_64B) {
/* All Book3S 64bit CPUs implement level based DEC logic */
tb_env->flags |= PPC_DECR_UNDERFLOW_LEVEL;
}
/* Create new timer */
tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_decr_cb, cpu);
if (env->has_hv_mode) {
tb_env->hdecr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_hdecr_cb,
cpu);
} else {
tb_env->hdecr_timer = NULL;
}
cpu_ppc_set_tb_clk(env, freq);
return &cpu_ppc_set_tb_clk;
}
/* Specific helpers for POWER & PowerPC 601 RTC */
#if 0
static clk_setup_cb cpu_ppc601_rtc_init (CPUPPCState *env)
{
return cpu_ppc_tb_init(env, 7812500);
}
#endif
void cpu_ppc601_store_rtcu (CPUPPCState *env, uint32_t value)
{
_cpu_ppc_store_tbu(env, value);
}
uint32_t cpu_ppc601_load_rtcu (CPUPPCState *env)
{
return _cpu_ppc_load_tbu(env);
}
void cpu_ppc601_store_rtcl (CPUPPCState *env, uint32_t value)
{
cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
}
uint32_t cpu_ppc601_load_rtcl (CPUPPCState *env)
{
return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
}
/*****************************************************************************/
/* PowerPC 40x timers */
/* PIT, FIT & WDT */
typedef struct ppc40x_timer_t ppc40x_timer_t;
struct ppc40x_timer_t {
uint64_t pit_reload; /* PIT auto-reload value */
uint64_t fit_next; /* Tick for next FIT interrupt */
QEMUTimer *fit_timer;
uint64_t wdt_next; /* Tick for next WDT interrupt */
QEMUTimer *wdt_timer;
/* 405 have the PIT, 440 have a DECR. */
unsigned int decr_excp;
};
/* Fixed interval timer */
static void cpu_4xx_fit_cb (void *opaque)
{
PowerPCCPU *cpu;
CPUPPCState *env;
ppc_tb_t *tb_env;
ppc40x_timer_t *ppc40x_timer;
uint64_t now, next;
env = opaque;
cpu = ppc_env_get_cpu(env);
tb_env = env->tb_env;
ppc40x_timer = tb_env->opaque;
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
case 0:
next = 1 << 9;
break;
case 1:
next = 1 << 13;
break;
case 2:
next = 1 << 17;
break;
case 3:
next = 1 << 21;
break;
default:
/* Cannot occur, but makes gcc happy */
return;
}
next = now + muldiv64(next, NANOSECONDS_PER_SECOND, tb_env->tb_freq);
if (next == now)
next++;
timer_mod(ppc40x_timer->fit_timer, next);
env->spr[SPR_40x_TSR] |= 1 << 26;
if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) {
ppc_set_irq(cpu, PPC_INTERRUPT_FIT, 1);
}
LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
(int)((env->spr[SPR_40x_TCR] >> 23) & 0x1),
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
}
/* Programmable interval timer */
static void start_stop_pit (CPUPPCState *env, ppc_tb_t *tb_env, int is_excp)
{
ppc40x_timer_t *ppc40x_timer;
uint64_t now, next;
ppc40x_timer = tb_env->opaque;
if (ppc40x_timer->pit_reload <= 1 ||
!((env->spr[SPR_40x_TCR] >> 26) & 0x1) ||
(is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) {
/* Stop PIT */
LOG_TB("%s: stop PIT\n", __func__);
timer_del(tb_env->decr_timer);
} else {
LOG_TB("%s: start PIT %016" PRIx64 "\n",
__func__, ppc40x_timer->pit_reload);
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
next = now + muldiv64(ppc40x_timer->pit_reload,
NANOSECONDS_PER_SECOND, tb_env->decr_freq);
if (is_excp)
next += tb_env->decr_next - now;
if (next == now)
next++;
timer_mod(tb_env->decr_timer, next);
tb_env->decr_next = next;
}
}
static void cpu_4xx_pit_cb (void *opaque)
{
PowerPCCPU *cpu;
CPUPPCState *env;
ppc_tb_t *tb_env;
ppc40x_timer_t *ppc40x_timer;
env = opaque;
cpu = ppc_env_get_cpu(env);
tb_env = env->tb_env;
ppc40x_timer = tb_env->opaque;
env->spr[SPR_40x_TSR] |= 1 << 27;
if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) {
ppc_set_irq(cpu, ppc40x_timer->decr_excp, 1);
}
start_stop_pit(env, tb_env, 1);
LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " "
"%016" PRIx64 "\n", __func__,
(int)((env->spr[SPR_40x_TCR] >> 22) & 0x1),
(int)((env->spr[SPR_40x_TCR] >> 26) & 0x1),
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
ppc40x_timer->pit_reload);
}
/* Watchdog timer */
static void cpu_4xx_wdt_cb (void *opaque)
{
PowerPCCPU *cpu;
CPUPPCState *env;
ppc_tb_t *tb_env;
ppc40x_timer_t *ppc40x_timer;
uint64_t now, next;
env = opaque;
cpu = ppc_env_get_cpu(env);
tb_env = env->tb_env;
ppc40x_timer = tb_env->opaque;
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
case 0:
next = 1 << 17;
break;
case 1:
next = 1 << 21;
break;
case 2:
next = 1 << 25;
break;
case 3:
next = 1 << 29;
break;
default:
/* Cannot occur, but makes gcc happy */
return;
}
next = now + muldiv64(next, NANOSECONDS_PER_SECOND, tb_env->decr_freq);
if (next == now)
next++;
LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
case 0x0:
case 0x1:
timer_mod(ppc40x_timer->wdt_timer, next);
ppc40x_timer->wdt_next = next;
env->spr[SPR_40x_TSR] |= 1U << 31;
break;
case 0x2:
timer_mod(ppc40x_timer->wdt_timer, next);
ppc40x_timer->wdt_next = next;
env->spr[SPR_40x_TSR] |= 1 << 30;
if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) {
ppc_set_irq(cpu, PPC_INTERRUPT_WDT, 1);
}
break;
case 0x3:
env->spr[SPR_40x_TSR] &= ~0x30000000;
env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
case 0x0:
/* No reset */
break;
case 0x1: /* Core reset */
ppc40x_core_reset(cpu);
break;
case 0x2: /* Chip reset */
ppc40x_chip_reset(cpu);
break;
case 0x3: /* System reset */
ppc40x_system_reset(cpu);
break;
}
}
}
void store_40x_pit (CPUPPCState *env, target_ulong val)
{
ppc_tb_t *tb_env;
ppc40x_timer_t *ppc40x_timer;
tb_env = env->tb_env;
ppc40x_timer = tb_env->opaque;
LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val);
ppc40x_timer->pit_reload = val;
start_stop_pit(env, tb_env, 0);
}
target_ulong load_40x_pit (CPUPPCState *env)
{
return cpu_ppc_load_decr(env);
}
static void ppc_40x_set_tb_clk (void *opaque, uint32_t freq)
{
CPUPPCState *env = opaque;
ppc_tb_t *tb_env = env->tb_env;
LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__,
freq);
tb_env->tb_freq = freq;
tb_env->decr_freq = freq;
/* XXX: we should also update all timers */
}
clk_setup_cb ppc_40x_timers_init (CPUPPCState *env, uint32_t freq,
unsigned int decr_excp)
{
ppc_tb_t *tb_env;
ppc40x_timer_t *ppc40x_timer;
tb_env = g_malloc0(sizeof(ppc_tb_t));
env->tb_env = tb_env;
tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED;
ppc40x_timer = g_malloc0(sizeof(ppc40x_timer_t));
tb_env->tb_freq = freq;
tb_env->decr_freq = freq;
tb_env->opaque = ppc40x_timer;
LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
if (ppc40x_timer != NULL) {
/* We use decr timer for PIT */
tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_pit_cb, env);
ppc40x_timer->fit_timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_fit_cb, env);
ppc40x_timer->wdt_timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_wdt_cb, env);
ppc40x_timer->decr_excp = decr_excp;
}
return &ppc_40x_set_tb_clk;
}
/*****************************************************************************/
/* Embedded PowerPC Device Control Registers */
typedef struct ppc_dcrn_t ppc_dcrn_t;
struct ppc_dcrn_t {
dcr_read_cb dcr_read;
dcr_write_cb dcr_write;
void *opaque;
};
/* XXX: on 460, DCR addresses are 32 bits wide,
* using DCRIPR to get the 22 upper bits of the DCR address
*/
#define DCRN_NB 1024
struct ppc_dcr_t {
ppc_dcrn_t dcrn[DCRN_NB];
int (*read_error)(int dcrn);
int (*write_error)(int dcrn);
};
int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
{
ppc_dcrn_t *dcr;
if (dcrn < 0 || dcrn >= DCRN_NB)
goto error;
dcr = &dcr_env->dcrn[dcrn];
if (dcr->dcr_read == NULL)
goto error;
*valp = (*dcr->dcr_read)(dcr->opaque, dcrn);
return 0;
error:
if (dcr_env->read_error != NULL)
return (*dcr_env->read_error)(dcrn);
return -1;
}
int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
{
ppc_dcrn_t *dcr;
if (dcrn < 0 || dcrn >= DCRN_NB)
goto error;
dcr = &dcr_env->dcrn[dcrn];
if (dcr->dcr_write == NULL)
goto error;
(*dcr->dcr_write)(dcr->opaque, dcrn, val);
return 0;
error:
if (dcr_env->write_error != NULL)
return (*dcr_env->write_error)(dcrn);
return -1;
}
int ppc_dcr_register (CPUPPCState *env, int dcrn, void *opaque,
dcr_read_cb dcr_read, dcr_write_cb dcr_write)
{
ppc_dcr_t *dcr_env;
ppc_dcrn_t *dcr;
dcr_env = env->dcr_env;
if (dcr_env == NULL)
return -1;
if (dcrn < 0 || dcrn >= DCRN_NB)
return -1;
dcr = &dcr_env->dcrn[dcrn];
if (dcr->opaque != NULL ||
dcr->dcr_read != NULL ||
dcr->dcr_write != NULL)
return -1;
dcr->opaque = opaque;
dcr->dcr_read = dcr_read;
dcr->dcr_write = dcr_write;
return 0;
}
int ppc_dcr_init (CPUPPCState *env, int (*read_error)(int dcrn),
int (*write_error)(int dcrn))
{
ppc_dcr_t *dcr_env;
dcr_env = g_malloc0(sizeof(ppc_dcr_t));
dcr_env->read_error = read_error;
dcr_env->write_error = write_error;
env->dcr_env = dcr_env;
return 0;
}
/*****************************************************************************/
/* Debug port */
void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
{
addr &= 0xF;
switch (addr) {
case 0:
printf("%c", val);
break;
case 1:
printf("\n");
fflush(stdout);
break;
case 2:
printf("Set loglevel to %04" PRIx32 "\n", val);
qemu_set_log(val | 0x100);
break;
}
}
/* CPU device-tree ID helpers */
int ppc_get_vcpu_dt_id(PowerPCCPU *cpu)
{
return cpu->cpu_dt_id;
}
PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id)
{
CPUState *cs;
CPU_FOREACH(cs) {
PowerPCCPU *cpu = POWERPC_CPU(cs);
if (cpu->cpu_dt_id == cpu_dt_id) {
return cpu;
}
}
return NULL;
}
void ppc_cpu_parse_features(const char *cpu_model)
{
CPUClass *cc;
ObjectClass *oc;
const char *typename;
gchar **model_pieces;
model_pieces = g_strsplit(cpu_model, ",", 2);
if (!model_pieces[0]) {
error_report("Invalid/empty CPU model name");
exit(1);
}
oc = cpu_class_by_name(TYPE_POWERPC_CPU, model_pieces[0]);
if (oc == NULL) {
error_report("Unable to find CPU definition: %s", model_pieces[0]);
exit(1);
}
typename = object_class_get_name(oc);
cc = CPU_CLASS(oc);
cc->parse_features(typename, model_pieces[1], &error_fatal);
g_strfreev(model_pieces);
}
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