diff options
Diffstat (limited to 'qemu/hw/xtensa/pic_cpu.c')
| -rw-r--r-- | qemu/hw/xtensa/pic_cpu.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/qemu/hw/xtensa/pic_cpu.c b/qemu/hw/xtensa/pic_cpu.c deleted file mode 100644 index c835bd009..000000000 --- a/qemu/hw/xtensa/pic_cpu.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * * Neither the name of the Open Source and Linux Lab nor the - * names of its contributors may be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "qemu/osdep.h" -#include "hw/hw.h" -#include "qemu/log.h" -#include "qemu/timer.h" - -void xtensa_advance_ccount(CPUXtensaState *env, uint32_t d) -{ - uint32_t old_ccount = env->sregs[CCOUNT] + 1; - - env->sregs[CCOUNT] += d; - - if (xtensa_option_enabled(env->config, XTENSA_OPTION_TIMER_INTERRUPT)) { - int i; - for (i = 0; i < env->config->nccompare; ++i) { - if (env->sregs[CCOMPARE + i] - old_ccount < d) { - xtensa_timer_irq(env, i, 1); - } - } - } -} - -void check_interrupts(CPUXtensaState *env) -{ - CPUState *cs = CPU(xtensa_env_get_cpu(env)); - int minlevel = xtensa_get_cintlevel(env); - uint32_t int_set_enabled = env->sregs[INTSET] & env->sregs[INTENABLE]; - int level; - - /* If the CPU is halted advance CCOUNT according to the QEMU_CLOCK_VIRTUAL time - * elapsed since the moment when it was advanced last time. - */ - if (cs->halted) { - int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - - xtensa_advance_ccount(env, - muldiv64(now - env->halt_clock, - env->config->clock_freq_khz, 1000000)); - env->halt_clock = now; - } - for (level = env->config->nlevel; level > minlevel; --level) { - if (env->config->level_mask[level] & int_set_enabled) { - env->pending_irq_level = level; - cpu_interrupt(cs, CPU_INTERRUPT_HARD); - qemu_log_mask(CPU_LOG_INT, - "%s level = %d, cintlevel = %d, " - "pc = %08x, a0 = %08x, ps = %08x, " - "intset = %08x, intenable = %08x, " - "ccount = %08x\n", - __func__, level, xtensa_get_cintlevel(env), - env->pc, env->regs[0], env->sregs[PS], - env->sregs[INTSET], env->sregs[INTENABLE], - env->sregs[CCOUNT]); - return; - } - } - env->pending_irq_level = 0; - cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); -} - -static void xtensa_set_irq(void *opaque, int irq, int active) -{ - CPUXtensaState *env = opaque; - - if (irq >= env->config->ninterrupt) { - qemu_log("%s: bad IRQ %d\n", __func__, irq); - } else { - uint32_t irq_bit = 1 << irq; - - if (active) { - env->sregs[INTSET] |= irq_bit; - } else if (env->config->interrupt[irq].inttype == INTTYPE_LEVEL) { - env->sregs[INTSET] &= ~irq_bit; - } - - check_interrupts(env); - } -} - -void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active) -{ - qemu_set_irq(env->irq_inputs[env->config->timerint[id]], active); -} - -void xtensa_rearm_ccompare_timer(CPUXtensaState *env) -{ - int i; - uint32_t wake_ccount = env->sregs[CCOUNT] - 1; - - for (i = 0; i < env->config->nccompare; ++i) { - if (env->sregs[CCOMPARE + i] - env->sregs[CCOUNT] < - wake_ccount - env->sregs[CCOUNT]) { - wake_ccount = env->sregs[CCOMPARE + i]; - } - } - env->wake_ccount = wake_ccount; - timer_mod(env->ccompare_timer, env->halt_clock + - muldiv64(wake_ccount - env->sregs[CCOUNT], - 1000000, env->config->clock_freq_khz)); -} - -static void xtensa_ccompare_cb(void *opaque) -{ - XtensaCPU *cpu = opaque; - CPUXtensaState *env = &cpu->env; - CPUState *cs = CPU(cpu); - - if (cs->halted) { - env->halt_clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - xtensa_advance_ccount(env, env->wake_ccount - env->sregs[CCOUNT]); - if (!cpu_has_work(cs)) { - env->sregs[CCOUNT] = env->wake_ccount + 1; - xtensa_rearm_ccompare_timer(env); - } - } -} - -void xtensa_irq_init(CPUXtensaState *env) -{ - XtensaCPU *cpu = xtensa_env_get_cpu(env); - - env->irq_inputs = (void **)qemu_allocate_irqs( - xtensa_set_irq, env, env->config->ninterrupt); - if (xtensa_option_enabled(env->config, XTENSA_OPTION_TIMER_INTERRUPT) && - env->config->nccompare > 0) { - env->ccompare_timer = - timer_new_ns(QEMU_CLOCK_VIRTUAL, &xtensa_ccompare_cb, cpu); - } -} - -void *xtensa_get_extint(CPUXtensaState *env, unsigned extint) -{ - if (extint < env->config->nextint) { - unsigned irq = env->config->extint[extint]; - return env->irq_inputs[irq]; - } else { - qemu_log("%s: trying to acquire invalid external interrupt %d\n", - __func__, extint); - return NULL; - } -} |