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Diffstat (limited to 'qemu/hw/openrisc/cputimer.c')
-rw-r--r--qemu/hw/openrisc/cputimer.c112
1 files changed, 0 insertions, 112 deletions
diff --git a/qemu/hw/openrisc/cputimer.c b/qemu/hw/openrisc/cputimer.c
deleted file mode 100644
index a98c799de..000000000
--- a/qemu/hw/openrisc/cputimer.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * QEMU OpenRISC timer support
- *
- * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
- * Zhizhou Zhang <etouzh@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "qemu/osdep.h"
-#include "cpu.h"
-#include "hw/hw.h"
-#include "qemu/timer.h"
-
-#define TIMER_PERIOD 50 /* 50 ns period for 20 MHz timer */
-
-/* The time when TTCR changes */
-static uint64_t last_clk;
-static int is_counting;
-
-void cpu_openrisc_count_update(OpenRISCCPU *cpu)
-{
- uint64_t now;
-
- if (!is_counting) {
- return;
- }
- now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- cpu->env.ttcr += (uint32_t)((now - last_clk) / TIMER_PERIOD);
- last_clk = now;
-}
-
-void cpu_openrisc_timer_update(OpenRISCCPU *cpu)
-{
- uint32_t wait;
- uint64_t now, next;
-
- if (!is_counting) {
- return;
- }
-
- cpu_openrisc_count_update(cpu);
- now = last_clk;
-
- if ((cpu->env.ttmr & TTMR_TP) <= (cpu->env.ttcr & TTMR_TP)) {
- wait = TTMR_TP - (cpu->env.ttcr & TTMR_TP) + 1;
- wait += cpu->env.ttmr & TTMR_TP;
- } else {
- wait = (cpu->env.ttmr & TTMR_TP) - (cpu->env.ttcr & TTMR_TP);
- }
- next = now + (uint64_t)wait * TIMER_PERIOD;
- timer_mod(cpu->env.timer, next);
-}
-
-void cpu_openrisc_count_start(OpenRISCCPU *cpu)
-{
- is_counting = 1;
- cpu_openrisc_count_update(cpu);
-}
-
-void cpu_openrisc_count_stop(OpenRISCCPU *cpu)
-{
- timer_del(cpu->env.timer);
- cpu_openrisc_count_update(cpu);
- is_counting = 0;
-}
-
-static void openrisc_timer_cb(void *opaque)
-{
- OpenRISCCPU *cpu = opaque;
-
- if ((cpu->env.ttmr & TTMR_IE) &&
- timer_expired(cpu->env.timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL))) {
- CPUState *cs = CPU(cpu);
-
- cpu->env.ttmr |= TTMR_IP;
- cs->interrupt_request |= CPU_INTERRUPT_TIMER;
- }
-
- switch (cpu->env.ttmr & TTMR_M) {
- case TIMER_NONE:
- break;
- case TIMER_INTR:
- cpu->env.ttcr = 0;
- break;
- case TIMER_SHOT:
- cpu_openrisc_count_stop(cpu);
- break;
- case TIMER_CONT:
- break;
- }
-
- cpu_openrisc_timer_update(cpu);
-}
-
-void cpu_openrisc_clock_init(OpenRISCCPU *cpu)
-{
- cpu->env.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &openrisc_timer_cb, cpu);
- cpu->env.ttmr = 0x00000000;
- cpu->env.ttcr = 0x00000000;
-}