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-rw-r--r--hw/slavio_timer.c288
1 files changed, 0 insertions, 288 deletions
diff --git a/hw/slavio_timer.c b/hw/slavio_timer.c
deleted file mode 100644
index 976f0d4..0000000
--- a/hw/slavio_timer.c
+++ /dev/null
@@ -1,288 +0,0 @@
-/*
- * QEMU Sparc SLAVIO timer controller emulation
- *
- * Copyright (c) 2003-2005 Fabrice Bellard
- *
- * 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 "vl.h"
-
-//#define DEBUG_TIMER
-
-#ifdef DEBUG_TIMER
-#define DPRINTF(fmt, args...) \
-do { printf("TIMER: " fmt , ##args); } while (0)
-#else
-#define DPRINTF(fmt, args...)
-#endif
-
-/*
- * Registers of hardware timer in sun4m.
- *
- * This is the timer/counter part of chip STP2001 (Slave I/O), also
- * produced as NCR89C105. See
- * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
- *
- * The 31-bit counter is incremented every 500ns by bit 9. Bits 8..0
- * are zero. Bit 31 is 1 when count has been reached.
- *
- * Per-CPU timers interrupt local CPU, system timer uses normal
- * interrupt routing.
- *
- */
-
-typedef struct SLAVIO_TIMERState {
- uint32_t limit, count, counthigh;
- int64_t count_load_time;
- int64_t expire_time;
- int64_t stop_time, tick_offset;
- QEMUTimer *irq_timer;
- int irq;
- int reached, stopped;
- int mode; // 0 = processor, 1 = user, 2 = system
- unsigned int cpu;
-} SLAVIO_TIMERState;
-
-#define TIMER_MAXADDR 0x1f
-#define CNT_FREQ 2000000
-
-// Update count, set irq, update expire_time
-static void slavio_timer_get_out(SLAVIO_TIMERState *s)
-{
- int out;
- int64_t diff, ticks, count;
- uint32_t limit;
-
- // There are three clock tick units: CPU ticks, register units
- // (nanoseconds), and counter ticks (500 ns).
- if (s->mode == 1 && s->stopped)
- ticks = s->stop_time;
- else
- ticks = qemu_get_clock(vm_clock) - s->tick_offset;
-
- out = (ticks > s->expire_time);
- if (out)
- s->reached = 0x80000000;
- if (!s->limit)
- limit = 0x7fffffff;
- else
- limit = s->limit;
-
- // Convert register units to counter ticks
- limit = limit >> 9;
-
- // Convert cpu ticks to counter ticks
- diff = muldiv64(ticks - s->count_load_time, CNT_FREQ, ticks_per_sec);
-
- // Calculate what the counter should be, convert to register
- // units
- count = diff % limit;
- s->count = count << 9;
- s->counthigh = count >> 22;
-
- // Expire time: CPU ticks left to next interrupt
- // Convert remaining counter ticks to CPU ticks
- s->expire_time = ticks + muldiv64(limit - count, ticks_per_sec, CNT_FREQ);
-
- DPRINTF("irq %d limit %d reached %d d %" PRId64 " count %d s->c %x diff %" PRId64 " stopped %d mode %d\n", s->irq, limit, s->reached?1:0, (ticks-s->count_load_time), count, s->count, s->expire_time - ticks, s->stopped, s->mode);
-
- if (s->mode != 1)
- pic_set_irq_cpu(s->irq, out, s->cpu);
-}
-
-// timer callback
-static void slavio_timer_irq(void *opaque)
-{
- SLAVIO_TIMERState *s = opaque;
-
- if (!s->irq_timer)
- return;
- slavio_timer_get_out(s);
- if (s->mode != 1)
- qemu_mod_timer(s->irq_timer, s->expire_time);
-}
-
-static uint32_t slavio_timer_mem_readl(void *opaque, target_phys_addr_t addr)
-{
- SLAVIO_TIMERState *s = opaque;
- uint32_t saddr;
-
- saddr = (addr & TIMER_MAXADDR) >> 2;
- switch (saddr) {
- case 0:
- // read limit (system counter mode) or read most signifying
- // part of counter (user mode)
- if (s->mode != 1) {
- // clear irq
- pic_set_irq_cpu(s->irq, 0, s->cpu);
- s->count_load_time = qemu_get_clock(vm_clock);
- s->reached = 0;
- return s->limit;
- }
- else {
- slavio_timer_get_out(s);
- return s->counthigh & 0x7fffffff;
- }
- case 1:
- // read counter and reached bit (system mode) or read lsbits
- // of counter (user mode)
- slavio_timer_get_out(s);
- if (s->mode != 1)
- return (s->count & 0x7fffffff) | s->reached;
- else
- return s->count;
- case 3:
- // read start/stop status
- return s->stopped;
- case 4:
- // read user/system mode
- return s->mode & 1;
- default:
- return 0;
- }
-}
-
-static void slavio_timer_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
-{
- SLAVIO_TIMERState *s = opaque;
- uint32_t saddr;
-
- saddr = (addr & TIMER_MAXADDR) >> 2;
- switch (saddr) {
- case 0:
- // set limit, reset counter
- s->count_load_time = qemu_get_clock(vm_clock);
- // fall through
- case 2:
- // set limit without resetting counter
- if (!val)
- s->limit = 0x7fffffff;
- else
- s->limit = val & 0x7fffffff;
- slavio_timer_irq(s);
- break;
- case 3:
- // start/stop user counter
- if (s->mode == 1) {
- if (val & 1) {
- s->stop_time = qemu_get_clock(vm_clock);
- s->stopped = 1;
- }
- else {
- if (s->stopped)
- s->tick_offset += qemu_get_clock(vm_clock) - s->stop_time;
- s->stopped = 0;
- }
- }
- break;
- case 4:
- // bit 0: user (1) or system (0) counter mode
- if (s->mode == 0 || s->mode == 1)
- s->mode = val & 1;
- break;
- default:
- break;
- }
-}
-
-static CPUReadMemoryFunc *slavio_timer_mem_read[3] = {
- slavio_timer_mem_readl,
- slavio_timer_mem_readl,
- slavio_timer_mem_readl,
-};
-
-static CPUWriteMemoryFunc *slavio_timer_mem_write[3] = {
- slavio_timer_mem_writel,
- slavio_timer_mem_writel,
- slavio_timer_mem_writel,
-};
-
-static void slavio_timer_save(QEMUFile *f, void *opaque)
-{
- SLAVIO_TIMERState *s = opaque;
-
- qemu_put_be32s(f, &s->limit);
- qemu_put_be32s(f, &s->count);
- qemu_put_be32s(f, &s->counthigh);
- qemu_put_be64s(f, &s->count_load_time);
- qemu_put_be64s(f, &s->expire_time);
- qemu_put_be64s(f, &s->stop_time);
- qemu_put_be64s(f, &s->tick_offset);
- qemu_put_be32s(f, &s->irq);
- qemu_put_be32s(f, &s->reached);
- qemu_put_be32s(f, &s->stopped);
- qemu_put_be32s(f, &s->mode);
-}
-
-static int slavio_timer_load(QEMUFile *f, void *opaque, int version_id)
-{
- SLAVIO_TIMERState *s = opaque;
-
- if (version_id != 1)
- return -EINVAL;
-
- qemu_get_be32s(f, &s->limit);
- qemu_get_be32s(f, &s->count);
- qemu_get_be32s(f, &s->counthigh);
- qemu_get_be64s(f, &s->count_load_time);
- qemu_get_be64s(f, &s->expire_time);
- qemu_get_be64s(f, &s->stop_time);
- qemu_get_be64s(f, &s->tick_offset);
- qemu_get_be32s(f, &s->irq);
- qemu_get_be32s(f, &s->reached);
- qemu_get_be32s(f, &s->stopped);
- qemu_get_be32s(f, &s->mode);
- return 0;
-}
-
-static void slavio_timer_reset(void *opaque)
-{
- SLAVIO_TIMERState *s = opaque;
-
- s->limit = 0;
- s->count = 0;
- s->count_load_time = qemu_get_clock(vm_clock);;
- s->stop_time = s->count_load_time;
- s->tick_offset = 0;
- s->reached = 0;
- s->mode &= 2;
- s->stopped = 1;
- slavio_timer_get_out(s);
-}
-
-void slavio_timer_init(uint32_t addr, int irq, int mode, unsigned int cpu)
-{
- int slavio_timer_io_memory;
- SLAVIO_TIMERState *s;
-
- s = qemu_mallocz(sizeof(SLAVIO_TIMERState));
- if (!s)
- return;
- s->irq = irq;
- s->mode = mode;
- s->cpu = cpu;
- s->irq_timer = qemu_new_timer(vm_clock, slavio_timer_irq, s);
-
- slavio_timer_io_memory = cpu_register_io_memory(0, slavio_timer_mem_read,
- slavio_timer_mem_write, s);
- cpu_register_physical_memory(addr, TIMER_MAXADDR, slavio_timer_io_memory);
- register_savevm("slavio_timer", addr, 1, slavio_timer_save, slavio_timer_load, s);
- qemu_register_reset(slavio_timer_reset, s);
- slavio_timer_reset(s);
-}
generated by cgit v1.1 at 2024-05-20 17:47:40 +0000