From 7993f8bc512f1f766aa35a87ac06eb62719d56c3 Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Mon, 4 Oct 2004 23:42:21 +0000
Subject: sparc merge (Blue Swirl)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1099 c046a42c-6fe2-441c-8c8c-71466251a162
---
 hw/timer.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 hw/timer.c

diff --git a/hw/timer.c b/hw/timer.c
new file mode 100644
index 0000000000..e393fa36fd
--- /dev/null
+++ b/hw/timer.c
@@ -0,0 +1,97 @@
+/*
+ * QEMU Sparc timer controller emulation
+ * 
+ * Copyright (c) 2003-2004 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"
+
+/*
+ * Registers of hardware timer in sun4m.
+ */
+struct sun4m_timer_percpu {
+	volatile unsigned int l14_timer_limit; /* Initial value is 0x009c4000 */
+	volatile unsigned int l14_cur_count;
+};
+
+struct sun4m_timer_global {
+        volatile unsigned int l10_timer_limit;
+        volatile unsigned int l10_cur_count;
+};
+
+typedef struct TIMERState {
+    uint32_t addr;
+    uint32_t timer_regs[2];
+    int irq;
+} TIMERState;
+
+static uint32_t timer_mem_readl(void *opaque, target_phys_addr_t addr)
+{
+    TIMERState *s = opaque;
+    uint32_t saddr;
+
+    saddr = (addr - s->addr) >> 2;
+    switch (saddr) {
+    default:
+	return s->timer_regs[saddr];
+	break;
+    }
+    return 0;
+}
+
+static void timer_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    TIMERState *s = opaque;
+    uint32_t saddr;
+
+    saddr = (addr - s->addr) >> 2;
+    switch (saddr) {
+    default:
+	s->timer_regs[saddr] = val;
+	break;
+    }
+}
+
+static CPUReadMemoryFunc *timer_mem_read[3] = {
+    timer_mem_readl,
+    timer_mem_readl,
+    timer_mem_readl,
+};
+
+static CPUWriteMemoryFunc *timer_mem_write[3] = {
+    timer_mem_writel,
+    timer_mem_writel,
+    timer_mem_writel,
+};
+
+void timer_init(uint32_t addr, int irq)
+{
+    int timer_io_memory;
+    TIMERState *s;
+
+    s = qemu_mallocz(sizeof(TIMERState));
+    if (!s)
+        return;
+    s->addr = addr;
+    s->irq = irq;
+
+    timer_io_memory = cpu_register_io_memory(0, timer_mem_read, timer_mem_write, s);
+    cpu_register_physical_memory(addr, 2, timer_io_memory);
+}
-- 
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