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-rw-r--r--hw/slavio_misc.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/hw/slavio_misc.c b/hw/slavio_misc.c
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+/*
+ * QEMU Sparc SLAVIO aux io port emulation
+ *
+ * Copyright (c) 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"
+/* debug misc */
+//#define DEBUG_MISC
+
+/*
+ * This is the auxio port, chip control and system control 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
+ *
+ * This also includes the PMC CPU idle controller.
+ */
+
+#ifdef DEBUG_MISC
+#define MISC_DPRINTF(fmt, args...) \
+do { printf("MISC: " fmt , ##args); } while (0)
+#else
+#define MISC_DPRINTF(fmt, args...)
+#endif
+
+typedef struct MiscState {
+ int irq;
+ uint8_t config;
+ uint8_t aux1, aux2;
+ uint8_t diag, mctrl;
+} MiscState;
+
+#define MISC_MAXADDR 1
+
+static void slavio_misc_update_irq(void *opaque)
+{
+ MiscState *s = opaque;
+
+ if ((s->aux2 & 0x4) && (s->config & 0x8)) {
+ pic_set_irq(s->irq, 1);
+ } else {
+ pic_set_irq(s->irq, 0);
+ }
+}
+
+static void slavio_misc_reset(void *opaque)
+{
+ MiscState *s = opaque;
+
+ // Diagnostic register not cleared in reset
+ s->config = s->aux1 = s->aux2 = s->mctrl = 0;
+}
+
+void slavio_set_power_fail(void *opaque, int power_failing)
+{
+ MiscState *s = opaque;
+
+ MISC_DPRINTF("Power fail: %d, config: %d\n", power_failing, s->config);
+ if (power_failing && (s->config & 0x8)) {
+ s->aux2 |= 0x4;
+ } else {
+ s->aux2 &= ~0x4;
+ }
+ slavio_misc_update_irq(s);
+}
+
+static void slavio_misc_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ MiscState *s = opaque;
+
+ switch (addr & 0xfff0000) {
+ case 0x1800000:
+ MISC_DPRINTF("Write config %2.2x\n", val & 0xff);
+ s->config = val & 0xff;
+ slavio_misc_update_irq(s);
+ break;
+ case 0x1900000:
+ MISC_DPRINTF("Write aux1 %2.2x\n", val & 0xff);
+ s->aux1 = val & 0xff;
+ break;
+ case 0x1910000:
+ val &= 0x3;
+ MISC_DPRINTF("Write aux2 %2.2x\n", val);
+ val |= s->aux2 & 0x4;
+ if (val & 0x2) // Clear Power Fail int
+ val &= 0x1;
+ s->aux2 = val;
+ if (val & 1)
+ qemu_system_shutdown_request();
+ slavio_misc_update_irq(s);
+ break;
+ case 0x1a00000:
+ MISC_DPRINTF("Write diag %2.2x\n", val & 0xff);
+ s->diag = val & 0xff;
+ break;
+ case 0x1b00000:
+ MISC_DPRINTF("Write modem control %2.2x\n", val & 0xff);
+ s->mctrl = val & 0xff;
+ break;
+ case 0x1f00000:
+ MISC_DPRINTF("Write system control %2.2x\n", val & 0xff);
+ if (val & 1)
+ qemu_system_reset_request();
+ break;
+ case 0xa000000:
+ MISC_DPRINTF("Write power management %2.2x\n", val & 0xff);
+#if 0
+ // XXX: halting CPU does not work
+ raise_exception(EXCP_HLT);
+ cpu_loop_exit();
+#endif
+ break;
+ }
+}
+
+static uint32_t slavio_misc_mem_readb(void *opaque, target_phys_addr_t addr)
+{
+ MiscState *s = opaque;
+ uint32_t ret = 0;
+
+ switch (addr & 0xfff0000) {
+ case 0x1800000:
+ ret = s->config;
+ MISC_DPRINTF("Read config %2.2x\n", ret);
+ break;
+ case 0x1900000:
+ ret = s->aux1;
+ MISC_DPRINTF("Read aux1 %2.2x\n", ret);
+ break;
+ case 0x1910000:
+ ret = s->aux2;
+ MISC_DPRINTF("Read aux2 %2.2x\n", ret);
+ break;
+ case 0x1a00000:
+ ret = s->diag;
+ MISC_DPRINTF("Read diag %2.2x\n", ret);
+ break;
+ case 0x1b00000:
+ ret = s->mctrl;
+ MISC_DPRINTF("Read modem control %2.2x\n", ret);
+ break;
+ case 0x1f00000:
+ MISC_DPRINTF("Read system control %2.2x\n", ret);
+ break;
+ case 0xa000000:
+ MISC_DPRINTF("Read power management %2.2x\n", ret);
+ break;
+ }
+ return ret;
+}
+
+static CPUReadMemoryFunc *slavio_misc_mem_read[3] = {
+ slavio_misc_mem_readb,
+ slavio_misc_mem_readb,
+ slavio_misc_mem_readb,
+};
+
+static CPUWriteMemoryFunc *slavio_misc_mem_write[3] = {
+ slavio_misc_mem_writeb,
+ slavio_misc_mem_writeb,
+ slavio_misc_mem_writeb,
+};
+
+static void slavio_misc_save(QEMUFile *f, void *opaque)
+{
+ MiscState *s = opaque;
+
+ qemu_put_be32s(f, &s->irq);
+ qemu_put_8s(f, &s->config);
+ qemu_put_8s(f, &s->aux1);
+ qemu_put_8s(f, &s->aux2);
+ qemu_put_8s(f, &s->diag);
+ qemu_put_8s(f, &s->mctrl);
+}
+
+static int slavio_misc_load(QEMUFile *f, void *opaque, int version_id)
+{
+ MiscState *s = opaque;
+
+ if (version_id != 1)
+ return -EINVAL;
+
+ qemu_get_be32s(f, &s->irq);
+ qemu_get_8s(f, &s->config);
+ qemu_get_8s(f, &s->aux1);
+ qemu_get_8s(f, &s->aux2);
+ qemu_get_8s(f, &s->diag);
+ qemu_get_8s(f, &s->mctrl);
+ return 0;
+}
+
+void *slavio_misc_init(uint32_t base, int irq)
+{
+ int slavio_misc_io_memory;
+ MiscState *s;
+
+ s = qemu_mallocz(sizeof(MiscState));
+ if (!s)
+ return NULL;
+
+ slavio_misc_io_memory = cpu_register_io_memory(0, slavio_misc_mem_read, slavio_misc_mem_write, s);
+ // Slavio control
+ cpu_register_physical_memory(base + 0x1800000, MISC_MAXADDR, slavio_misc_io_memory);
+ // AUX 1
+ cpu_register_physical_memory(base + 0x1900000, MISC_MAXADDR, slavio_misc_io_memory);
+ // AUX 2
+ cpu_register_physical_memory(base + 0x1910000, MISC_MAXADDR, slavio_misc_io_memory);
+ // Diagnostics
+ cpu_register_physical_memory(base + 0x1a00000, MISC_MAXADDR, slavio_misc_io_memory);
+ // Modem control
+ cpu_register_physical_memory(base + 0x1b00000, MISC_MAXADDR, slavio_misc_io_memory);
+ // System control
+ cpu_register_physical_memory(base + 0x1f00000, MISC_MAXADDR, slavio_misc_io_memory);
+ // Power management
+ cpu_register_physical_memory(base + 0xa000000, MISC_MAXADDR, slavio_misc_io_memory);
+
+ s->irq = irq;
+
+ register_savevm("slavio_misc", base, 1, slavio_misc_save, slavio_misc_load, s);
+ qemu_register_reset(slavio_misc_reset, s);
+ slavio_misc_reset(s);
+ return s;
+}
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