diff options
author | Paolo Bonzini <pbonzini@redhat.com> | 2013-02-05 12:03:15 +0100 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-03-01 15:01:19 +0100 |
commit | 530182169e897c0e401b245552a4c58dc6846912 (patch) | |
tree | 8c39251d7e89855a89d925359f71639400782cd6 /hw/mips_timer.c | |
parent | e4c8b28cde12d01ada8fe869567dc5717a2dfcb7 (diff) |
hw: move boards and other isolated files to hw/ARCH
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/mips_timer.c')
-rw-r--r-- | hw/mips_timer.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/hw/mips_timer.c b/hw/mips_timer.c deleted file mode 100644 index 9ad13f3924..0000000000 --- a/hw/mips_timer.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * QEMU MIPS timer support - * - * 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 "hw/hw.h" -#include "hw/mips_cpudevs.h" -#include "qemu/timer.h" - -#define TIMER_FREQ 100 * 1000 * 1000 - -/* XXX: do not use a global */ -uint32_t cpu_mips_get_random (CPUMIPSState *env) -{ - static uint32_t lfsr = 1; - static uint32_t prev_idx = 0; - uint32_t idx; - /* Don't return same value twice, so get another value */ - do { - lfsr = (lfsr >> 1) ^ (-(lfsr & 1u) & 0xd0000001u); - idx = lfsr % (env->tlb->nb_tlb - env->CP0_Wired) + env->CP0_Wired; - } while (idx == prev_idx); - prev_idx = idx; - return idx; -} - -/* MIPS R4K timer */ -static void cpu_mips_timer_update(CPUMIPSState *env) -{ - uint64_t now, next; - uint32_t wait; - - now = qemu_get_clock_ns(vm_clock); - wait = env->CP0_Compare - env->CP0_Count - - (uint32_t)muldiv64(now, TIMER_FREQ, get_ticks_per_sec()); - next = now + muldiv64(wait, get_ticks_per_sec(), TIMER_FREQ); - qemu_mod_timer(env->timer, next); -} - -/* Expire the timer. */ -static void cpu_mips_timer_expire(CPUMIPSState *env) -{ - cpu_mips_timer_update(env); - if (env->insn_flags & ISA_MIPS32R2) { - env->CP0_Cause |= 1 << CP0Ca_TI; - } - qemu_irq_raise(env->irq[(env->CP0_IntCtl >> CP0IntCtl_IPTI) & 0x7]); -} - -uint32_t cpu_mips_get_count (CPUMIPSState *env) -{ - if (env->CP0_Cause & (1 << CP0Ca_DC)) { - return env->CP0_Count; - } else { - uint64_t now; - - now = qemu_get_clock_ns(vm_clock); - if (qemu_timer_pending(env->timer) - && qemu_timer_expired(env->timer, now)) { - /* The timer has already expired. */ - cpu_mips_timer_expire(env); - } - - return env->CP0_Count + - (uint32_t)muldiv64(now, TIMER_FREQ, get_ticks_per_sec()); - } -} - -void cpu_mips_store_count (CPUMIPSState *env, uint32_t count) -{ - if (env->CP0_Cause & (1 << CP0Ca_DC)) - env->CP0_Count = count; - else { - /* Store new count register */ - env->CP0_Count = - count - (uint32_t)muldiv64(qemu_get_clock_ns(vm_clock), - TIMER_FREQ, get_ticks_per_sec()); - /* Update timer timer */ - cpu_mips_timer_update(env); - } -} - -void cpu_mips_store_compare (CPUMIPSState *env, uint32_t value) -{ - env->CP0_Compare = value; - if (!(env->CP0_Cause & (1 << CP0Ca_DC))) - cpu_mips_timer_update(env); - if (env->insn_flags & ISA_MIPS32R2) - env->CP0_Cause &= ~(1 << CP0Ca_TI); - qemu_irq_lower(env->irq[(env->CP0_IntCtl >> CP0IntCtl_IPTI) & 0x7]); -} - -void cpu_mips_start_count(CPUMIPSState *env) -{ - cpu_mips_store_count(env, env->CP0_Count); -} - -void cpu_mips_stop_count(CPUMIPSState *env) -{ - /* Store the current value */ - env->CP0_Count += (uint32_t)muldiv64(qemu_get_clock_ns(vm_clock), - TIMER_FREQ, get_ticks_per_sec()); -} - -static void mips_timer_cb (void *opaque) -{ - CPUMIPSState *env; - - env = opaque; -#if 0 - qemu_log("%s\n", __func__); -#endif - - if (env->CP0_Cause & (1 << CP0Ca_DC)) - return; - - /* ??? This callback should occur when the counter is exactly equal to - the comparator value. Offset the count by one to avoid immediately - retriggering the callback before any virtual time has passed. */ - env->CP0_Count++; - cpu_mips_timer_expire(env); - env->CP0_Count--; -} - -void cpu_mips_clock_init (CPUMIPSState *env) -{ - env->timer = qemu_new_timer_ns(vm_clock, &mips_timer_cb, env); - env->CP0_Compare = 0; - cpu_mips_store_count(env, 1); -} |