diff options
Diffstat (limited to 'qemu/hw/ppc/ppc_booke.c')
| -rw-r--r-- | qemu/hw/ppc/ppc_booke.c | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/qemu/hw/ppc/ppc_booke.c b/qemu/hw/ppc/ppc_booke.c deleted file mode 100644 index ab8d026c3..000000000 --- a/qemu/hw/ppc/ppc_booke.c +++ /dev/null @@ -1,368 +0,0 @@ -/* - * QEMU PowerPC Booke hardware System Emulator - * - * Copyright (c) 2011 AdaCore - * - * 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 "qemu/timer.h" -#include "sysemu/sysemu.h" -#include "hw/timer/m48t59.h" -#include "qemu/log.h" -#include "hw/loader.h" -#include "kvm_ppc.h" - - -/* Timer Control Register */ - -#define TCR_WP_SHIFT 30 /* Watchdog Timer Period */ -#define TCR_WP_MASK (0x3U << TCR_WP_SHIFT) -#define TCR_WRC_SHIFT 28 /* Watchdog Timer Reset Control */ -#define TCR_WRC_MASK (0x3U << TCR_WRC_SHIFT) -#define TCR_WIE (1U << 27) /* Watchdog Timer Interrupt Enable */ -#define TCR_DIE (1U << 26) /* Decrementer Interrupt Enable */ -#define TCR_FP_SHIFT 24 /* Fixed-Interval Timer Period */ -#define TCR_FP_MASK (0x3U << TCR_FP_SHIFT) -#define TCR_FIE (1U << 23) /* Fixed-Interval Timer Interrupt Enable */ -#define TCR_ARE (1U << 22) /* Auto-Reload Enable */ - -/* Timer Control Register (e500 specific fields) */ - -#define TCR_E500_FPEXT_SHIFT 13 /* Fixed-Interval Timer Period Extension */ -#define TCR_E500_FPEXT_MASK (0xf << TCR_E500_FPEXT_SHIFT) -#define TCR_E500_WPEXT_SHIFT 17 /* Watchdog Timer Period Extension */ -#define TCR_E500_WPEXT_MASK (0xf << TCR_E500_WPEXT_SHIFT) - -/* Timer Status Register */ - -#define TSR_FIS (1U << 26) /* Fixed-Interval Timer Interrupt Status */ -#define TSR_DIS (1U << 27) /* Decrementer Interrupt Status */ -#define TSR_WRS_SHIFT 28 /* Watchdog Timer Reset Status */ -#define TSR_WRS_MASK (0x3U << TSR_WRS_SHIFT) -#define TSR_WIS (1U << 30) /* Watchdog Timer Interrupt Status */ -#define TSR_ENW (1U << 31) /* Enable Next Watchdog Timer */ - -typedef struct booke_timer_t booke_timer_t; -struct booke_timer_t { - - uint64_t fit_next; - QEMUTimer *fit_timer; - - uint64_t wdt_next; - QEMUTimer *wdt_timer; - - uint32_t flags; -}; - -static void booke_update_irq(PowerPCCPU *cpu) -{ - CPUPPCState *env = &cpu->env; - - ppc_set_irq(cpu, PPC_INTERRUPT_DECR, - (env->spr[SPR_BOOKE_TSR] & TSR_DIS - && env->spr[SPR_BOOKE_TCR] & TCR_DIE)); - - ppc_set_irq(cpu, PPC_INTERRUPT_WDT, - (env->spr[SPR_BOOKE_TSR] & TSR_WIS - && env->spr[SPR_BOOKE_TCR] & TCR_WIE)); - - ppc_set_irq(cpu, PPC_INTERRUPT_FIT, - (env->spr[SPR_BOOKE_TSR] & TSR_FIS - && env->spr[SPR_BOOKE_TCR] & TCR_FIE)); -} - -/* Return the location of the bit of time base at which the FIT will raise an - interrupt */ -static uint8_t booke_get_fit_target(CPUPPCState *env, ppc_tb_t *tb_env) -{ - uint8_t fp = (env->spr[SPR_BOOKE_TCR] & TCR_FP_MASK) >> TCR_FP_SHIFT; - - if (tb_env->flags & PPC_TIMER_E500) { - /* e500 Fixed-interval timer period extension */ - uint32_t fpext = (env->spr[SPR_BOOKE_TCR] & TCR_E500_FPEXT_MASK) - >> TCR_E500_FPEXT_SHIFT; - fp = 63 - (fp | fpext << 2); - } else { - fp = env->fit_period[fp]; - } - - return fp; -} - -/* Return the location of the bit of time base at which the WDT will raise an - interrupt */ -static uint8_t booke_get_wdt_target(CPUPPCState *env, ppc_tb_t *tb_env) -{ - uint8_t wp = (env->spr[SPR_BOOKE_TCR] & TCR_WP_MASK) >> TCR_WP_SHIFT; - - if (tb_env->flags & PPC_TIMER_E500) { - /* e500 Watchdog timer period extension */ - uint32_t wpext = (env->spr[SPR_BOOKE_TCR] & TCR_E500_WPEXT_MASK) - >> TCR_E500_WPEXT_SHIFT; - wp = 63 - (wp | wpext << 2); - } else { - wp = env->wdt_period[wp]; - } - - return wp; -} - -static void booke_update_fixed_timer(CPUPPCState *env, - uint8_t target_bit, - uint64_t *next, - QEMUTimer *timer, - int tsr_bit) -{ - ppc_tb_t *tb_env = env->tb_env; - uint64_t delta_tick, ticks = 0; - uint64_t tb; - uint64_t period; - uint64_t now; - - if (!(env->spr[SPR_BOOKE_TSR] & tsr_bit)) { - /* - * Don't arm the timer again when the guest has the current - * interrupt still pending. Wait for it to ack it. - */ - return; - } - - now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - tb = cpu_ppc_get_tb(tb_env, now, tb_env->tb_offset); - period = 1ULL << target_bit; - delta_tick = period - (tb & (period - 1)); - - /* the timer triggers only when the selected bit toggles from 0 to 1 */ - if (tb & period) { - ticks = period; - } - - if (ticks + delta_tick < ticks) { - /* Overflow, so assume the biggest number we can express. */ - ticks = UINT64_MAX; - } else { - ticks += delta_tick; - } - - *next = now + muldiv64(ticks, NANOSECONDS_PER_SECOND, tb_env->tb_freq); - if ((*next < now) || (*next > INT64_MAX)) { - /* Overflow, so assume the biggest number the qemu timer supports. */ - *next = INT64_MAX; - } - - /* XXX: If expire time is now. We can't run the callback because we don't - * have access to it. So we just set the timer one nanosecond later. - */ - - if (*next == now) { - (*next)++; - } else { - /* - * There's no point to fake any granularity that's more fine grained - * than milliseconds. Anything beyond that just overloads the system. - */ - *next = MAX(*next, now + SCALE_MS); - } - - /* Fire the next timer */ - timer_mod(timer, *next); -} - -static void booke_decr_cb(void *opaque) -{ - PowerPCCPU *cpu = opaque; - CPUPPCState *env = &cpu->env; - - env->spr[SPR_BOOKE_TSR] |= TSR_DIS; - booke_update_irq(cpu); - - if (env->spr[SPR_BOOKE_TCR] & TCR_ARE) { - /* Auto Reload */ - cpu_ppc_store_decr(env, env->spr[SPR_BOOKE_DECAR]); - } -} - -static void booke_fit_cb(void *opaque) -{ - PowerPCCPU *cpu = opaque; - CPUPPCState *env = &cpu->env; - ppc_tb_t *tb_env; - booke_timer_t *booke_timer; - - tb_env = env->tb_env; - booke_timer = tb_env->opaque; - env->spr[SPR_BOOKE_TSR] |= TSR_FIS; - - booke_update_irq(cpu); - - booke_update_fixed_timer(env, - booke_get_fit_target(env, tb_env), - &booke_timer->fit_next, - booke_timer->fit_timer, - TSR_FIS); -} - -static void booke_wdt_cb(void *opaque) -{ - PowerPCCPU *cpu = opaque; - CPUPPCState *env = &cpu->env; - ppc_tb_t *tb_env; - booke_timer_t *booke_timer; - - tb_env = env->tb_env; - booke_timer = tb_env->opaque; - - /* TODO: There's lots of complicated stuff to do here */ - - booke_update_irq(cpu); - - booke_update_fixed_timer(env, - booke_get_wdt_target(env, tb_env), - &booke_timer->wdt_next, - booke_timer->wdt_timer, - TSR_WIS); -} - -void store_booke_tsr(CPUPPCState *env, target_ulong val) -{ - PowerPCCPU *cpu = ppc_env_get_cpu(env); - ppc_tb_t *tb_env = env->tb_env; - booke_timer_t *booke_timer = tb_env->opaque; - - env->spr[SPR_BOOKE_TSR] &= ~val; - kvmppc_clear_tsr_bits(cpu, val); - - if (val & TSR_FIS) { - booke_update_fixed_timer(env, - booke_get_fit_target(env, tb_env), - &booke_timer->fit_next, - booke_timer->fit_timer, - TSR_FIS); - } - - if (val & TSR_WIS) { - booke_update_fixed_timer(env, - booke_get_wdt_target(env, tb_env), - &booke_timer->wdt_next, - booke_timer->wdt_timer, - TSR_WIS); - } - - booke_update_irq(cpu); -} - -void store_booke_tcr(CPUPPCState *env, target_ulong val) -{ - PowerPCCPU *cpu = ppc_env_get_cpu(env); - ppc_tb_t *tb_env = env->tb_env; - booke_timer_t *booke_timer = tb_env->opaque; - - tb_env = env->tb_env; - env->spr[SPR_BOOKE_TCR] = val; - kvmppc_set_tcr(cpu); - - booke_update_irq(cpu); - - booke_update_fixed_timer(env, - booke_get_fit_target(env, tb_env), - &booke_timer->fit_next, - booke_timer->fit_timer, - TSR_FIS); - - booke_update_fixed_timer(env, - booke_get_wdt_target(env, tb_env), - &booke_timer->wdt_next, - booke_timer->wdt_timer, - TSR_WIS); -} - -static void ppc_booke_timer_reset_handle(void *opaque) -{ - PowerPCCPU *cpu = opaque; - CPUPPCState *env = &cpu->env; - - store_booke_tcr(env, 0); - store_booke_tsr(env, -1); -} - -/* - * This function will be called whenever the CPU state changes. - * CPU states are defined "typedef enum RunState". - * Regarding timer, When CPU state changes to running after debug halt - * or similar cases which takes time then in between final watchdog - * expiry happenes. This will cause exit to QEMU and configured watchdog - * action will be taken. To avoid this we always clear the watchdog state when - * state changes to running. - */ -static void cpu_state_change_handler(void *opaque, int running, RunState state) -{ - PowerPCCPU *cpu = opaque; - CPUPPCState *env = &cpu->env; - - if (!running) { - return; - } - - /* - * Clear watchdog interrupt condition by clearing TSR. - */ - store_booke_tsr(env, TSR_ENW | TSR_WIS | TSR_WRS_MASK); -} - -void ppc_booke_timers_init(PowerPCCPU *cpu, uint32_t freq, uint32_t flags) -{ - ppc_tb_t *tb_env; - booke_timer_t *booke_timer; - int ret = 0; - - tb_env = g_malloc0(sizeof(ppc_tb_t)); - booke_timer = g_malloc0(sizeof(booke_timer_t)); - - cpu->env.tb_env = tb_env; - tb_env->flags = flags | PPC_TIMER_BOOKE | PPC_DECR_ZERO_TRIGGERED; - - tb_env->tb_freq = freq; - tb_env->decr_freq = freq; - tb_env->opaque = booke_timer; - tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &booke_decr_cb, cpu); - - booke_timer->fit_timer = - timer_new_ns(QEMU_CLOCK_VIRTUAL, &booke_fit_cb, cpu); - booke_timer->wdt_timer = - timer_new_ns(QEMU_CLOCK_VIRTUAL, &booke_wdt_cb, cpu); - - ret = kvmppc_booke_watchdog_enable(cpu); - - if (ret) { - /* TODO: Start the QEMU emulated watchdog if not running on KVM. - * Also start the QEMU emulated watchdog if KVM does not support - * emulated watchdog or somehow it is not enabled (supported but - * not enabled is though some bug and requires debugging :)). - */ - } - - qemu_add_vm_change_state_handler(cpu_state_change_handler, cpu); - - qemu_register_reset(ppc_booke_timer_reset_handle, cpu); -} |