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-rw-r--r--hw/ppc/Makefile.objs1
-rw-r--r--hw/ppc/prep_systemio.c303
-rw-r--r--hw/ppc/trace-events4
3 files changed, 308 insertions, 0 deletions
diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs
index 8025129..db72297 100644
--- a/hw/ppc/Makefile.objs
+++ b/hw/ppc/Makefile.objs
@@ -16,6 +16,7 @@ obj-y += ppc405_boards.o ppc4xx_devs.o ppc405_uc.o ppc440_bamboo.o
obj-y += ppc4xx_pci.o
# PReP
obj-$(CONFIG_PREP) += prep.o
+obj-$(CONFIG_PREP) += prep_systemio.o
# OldWorld PowerMac
obj-$(CONFIG_MAC) += mac_oldworld.o
# NewWorld PowerMac
diff --git a/hw/ppc/prep_systemio.c b/hw/ppc/prep_systemio.c
new file mode 100644
index 0000000..50893ec
--- /dev/null
+++ b/hw/ppc/prep_systemio.c
@@ -0,0 +1,303 @@
+/*
+ * QEMU PReP System I/O emulation
+ *
+ * Copyright (c) 2017 Hervé Poussineau
+ *
+ * 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 "qemu/osdep.h"
+#include "hw/isa/isa.h"
+#include "exec/address-spaces.h"
+#include "qemu/error-report.h" /* for error_report() */
+#include "sysemu/sysemu.h" /* for vm_stop() */
+#include "cpu.h"
+#include "trace.h"
+
+#define TYPE_PREP_SYSTEMIO "prep-systemio"
+#define PREP_SYSTEMIO(obj) \
+ OBJECT_CHECK(PrepSystemIoState, (obj), TYPE_PREP_SYSTEMIO)
+
+/* Bit as defined in PowerPC Reference Plaform v1.1, sect. 6.1.5, p. 132 */
+#define PREP_BIT(n) (1 << (7 - (n)))
+
+typedef struct PrepSystemIoState {
+ ISADevice parent_obj;
+ MemoryRegion ppc_parity_mem;
+
+ qemu_irq non_contiguous_io_map_irq;
+ uint8_t sreset; /* 0x0092 */
+ uint8_t equipment; /* 0x080c */
+ uint8_t system_control; /* 0x081c */
+ uint8_t iomap_type; /* 0x0850 */
+ uint8_t ibm_planar_id; /* 0x0852 */
+ qemu_irq softreset_irq;
+ PortioList portio;
+} PrepSystemIoState;
+
+/* PORT 0092 -- Special Port 92 (Read/Write) */
+
+enum {
+ PORT0092_SOFTRESET = PREP_BIT(7),
+ PORT0092_LE_MODE = PREP_BIT(6),
+};
+
+static void prep_port0092_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ PrepSystemIoState *s = opaque;
+
+ trace_prep_systemio_write(addr, val);
+
+ s->sreset = val & PORT0092_SOFTRESET;
+ qemu_set_irq(s->softreset_irq, s->sreset);
+
+ if ((val & PORT0092_LE_MODE) != 0) {
+ /* XXX Not supported yet */
+ error_report("little-endian mode not supported");
+ vm_stop(RUN_STATE_PAUSED);
+ } else {
+ /* Nothing to do */
+ }
+}
+
+static uint32_t prep_port0092_read(void *opaque, uint32_t addr)
+{
+ PrepSystemIoState *s = opaque;
+ trace_prep_systemio_read(addr, s->sreset);
+ return s->sreset;
+}
+
+/* PORT 0808 -- Hardfile Light Register (Write Only) */
+
+enum {
+ PORT0808_HARDFILE_LIGHT_ON = PREP_BIT(7),
+};
+
+static void prep_port0808_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ trace_prep_systemio_write(addr, val);
+}
+
+/* PORT 0810 -- Password Protect 1 Register (Write Only) */
+
+/* reset by port 0x4D in the SIO */
+static void prep_port0810_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ trace_prep_systemio_write(addr, val);
+}
+
+/* PORT 0812 -- Password Protect 2 Register (Write Only) */
+
+/* reset by port 0x4D in the SIO */
+static void prep_port0812_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ trace_prep_systemio_write(addr, val);
+}
+
+/* PORT 0814 -- L2 Invalidate Register (Write Only) */
+
+static void prep_port0814_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ trace_prep_systemio_write(addr, val);
+}
+
+/* PORT 0818 -- Reserved for Keylock (Read Only) */
+
+enum {
+ PORT0818_KEYLOCK_SIGNAL_HIGH = PREP_BIT(7),
+};
+
+static uint32_t prep_port0818_read(void *opaque, uint32_t addr)
+{
+ uint32_t val = 0;
+ trace_prep_systemio_read(addr, val);
+ return val;
+}
+
+/* PORT 080C -- Equipment */
+
+enum {
+ PORT080C_SCSIFUSE = PREP_BIT(1),
+ PORT080C_L2_COPYBACK = PREP_BIT(4),
+ PORT080C_L2_256 = PREP_BIT(5),
+ PORT080C_UPGRADE_CPU = PREP_BIT(6),
+ PORT080C_L2 = PREP_BIT(7),
+};
+
+static uint32_t prep_port080c_read(void *opaque, uint32_t addr)
+{
+ PrepSystemIoState *s = opaque;
+ trace_prep_systemio_read(addr, s->equipment);
+ return s->equipment;
+}
+
+/* PORT 081C -- System Control Register (Read/Write) */
+
+enum {
+ PORT081C_FLOPPY_MOTOR_INHIBIT = PREP_BIT(3),
+ PORT081C_MASK_TEA = PREP_BIT(2),
+ PORT081C_L2_UPDATE_INHIBIT = PREP_BIT(1),
+ PORT081C_L2_CACHEMISS_INHIBIT = PREP_BIT(0),
+};
+
+static void prep_port081c_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ static const uint8_t mask = PORT081C_FLOPPY_MOTOR_INHIBIT |
+ PORT081C_MASK_TEA |
+ PORT081C_L2_UPDATE_INHIBIT |
+ PORT081C_L2_CACHEMISS_INHIBIT;
+ PrepSystemIoState *s = opaque;
+ trace_prep_systemio_write(addr, val);
+ s->system_control = val & mask;
+}
+
+static uint32_t prep_port081c_read(void *opaque, uint32_t addr)
+{
+ PrepSystemIoState *s = opaque;
+ trace_prep_systemio_read(addr, s->system_control);
+ return s->system_control;
+}
+
+/* System Board Identification */
+
+static uint32_t prep_port0852_read(void *opaque, uint32_t addr)
+{
+ PrepSystemIoState *s = opaque;
+ trace_prep_systemio_read(addr, s->ibm_planar_id);
+ return s->ibm_planar_id;
+}
+
+/* PORT 0850 -- I/O Map Type Register (Read/Write) */
+
+enum {
+ PORT0850_IOMAP_NONCONTIGUOUS = PREP_BIT(7),
+};
+
+static uint32_t prep_port0850_read(void *opaque, uint32_t addr)
+{
+ PrepSystemIoState *s = opaque;
+ trace_prep_systemio_read(addr, s->iomap_type);
+ return s->iomap_type;
+}
+
+static void prep_port0850_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ PrepSystemIoState *s = opaque;
+
+ trace_prep_systemio_write(addr, val);
+ qemu_set_irq(s->non_contiguous_io_map_irq,
+ val & PORT0850_IOMAP_NONCONTIGUOUS);
+ s->iomap_type = val & PORT0850_IOMAP_NONCONTIGUOUS;
+}
+
+static const MemoryRegionPortio ppc_io800_port_list[] = {
+ { 0x092, 1, 1, .read = prep_port0092_read,
+ .write = prep_port0092_write, },
+ { 0x808, 1, 1, .write = prep_port0808_write, },
+ { 0x80c, 1, 1, .read = prep_port080c_read, },
+ { 0x810, 1, 1, .write = prep_port0810_write, },
+ { 0x812, 1, 1, .write = prep_port0812_write, },
+ { 0x814, 1, 1, .write = prep_port0814_write, },
+ { 0x818, 1, 1, .read = prep_port0818_read },
+ { 0x81c, 1, 1, .read = prep_port081c_read,
+ .write = prep_port081c_write, },
+ { 0x850, 1, 1, .read = prep_port0850_read,
+ .write = prep_port0850_write, },
+ { 0x852, 1, 1, .read = prep_port0852_read, },
+ PORTIO_END_OF_LIST()
+};
+
+static uint64_t ppc_parity_error_readl(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ uint32_t val = 0;
+ trace_prep_systemio_read((unsigned int)addr, val);
+ return val;
+}
+
+static const MemoryRegionOps ppc_parity_error_ops = {
+ .read = ppc_parity_error_readl,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
+static void prep_systemio_realize(DeviceState *dev, Error **errp)
+{
+ ISADevice *isa = ISA_DEVICE(dev);
+ PrepSystemIoState *s = PREP_SYSTEMIO(dev);
+ PowerPCCPU *cpu;
+
+ qdev_init_gpio_out(dev, &s->non_contiguous_io_map_irq, 1);
+ s->iomap_type = PORT0850_IOMAP_NONCONTIGUOUS;
+ qemu_set_irq(s->non_contiguous_io_map_irq,
+ s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS);
+ cpu = POWERPC_CPU(first_cpu);
+ s->softreset_irq = cpu->env.irq_inputs[PPC6xx_INPUT_HRESET];
+
+ isa_register_portio_list(isa, &s->portio, 0x0, ppc_io800_port_list, s,
+ "systemio800");
+
+ memory_region_init_io(&s->ppc_parity_mem, OBJECT(dev),
+ &ppc_parity_error_ops, s, "ppc-parity", 0x4);
+ memory_region_add_subregion(get_system_memory(), 0xbfffeff0,
+ &s->ppc_parity_mem);
+}
+
+static const VMStateDescription vmstate_prep_systemio = {
+ .name = "prep_systemio",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(sreset, PrepSystemIoState),
+ VMSTATE_UINT8(system_control, PrepSystemIoState),
+ VMSTATE_UINT8(iomap_type, PrepSystemIoState),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static Property prep_systemio_properties[] = {
+ DEFINE_PROP_UINT8("ibm-planar-id", PrepSystemIoState, ibm_planar_id, 0),
+ DEFINE_PROP_UINT8("equipment", PrepSystemIoState, equipment, 0),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static void prep_systemio_class_initfn(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = prep_systemio_realize;
+ dc->vmsd = &vmstate_prep_systemio;
+ dc->props = prep_systemio_properties;
+}
+
+static TypeInfo prep_systemio800_info = {
+ .name = TYPE_PREP_SYSTEMIO,
+ .parent = TYPE_ISA_DEVICE,
+ .instance_size = sizeof(PrepSystemIoState),
+ .class_init = prep_systemio_class_initfn,
+};
+
+static void prep_systemio_register_types(void)
+{
+ type_register_static(&prep_systemio800_info);
+}
+
+type_init(prep_systemio_register_types)
diff --git a/hw/ppc/trace-events b/hw/ppc/trace-events
index 2297ead..2ba6166 100644
--- a/hw/ppc/trace-events
+++ b/hw/ppc/trace-events
@@ -74,3 +74,7 @@ ppc_tb_adjust(uint64_t offs1, uint64_t offs2, int64_t diff, int64_t seconds) "ad
# hw/ppc/prep.c
prep_io_800_writeb(uint32_t addr, uint32_t val) "0x%08" PRIx32 " => 0x%02" PRIx32
prep_io_800_readb(uint32_t addr, uint32_t retval) "0x%08" PRIx32 " <= 0x%02" PRIx32
+
+# hw/ppc/prep_systemio.c
+prep_systemio_read(uint32_t addr, uint32_t val) "read addr=%x val=%x"
+prep_systemio_write(uint32_t addr, uint32_t val) "write addr=%x val=%x"
generated by cgit v1.1 at 2024-12-29 18:47:20 +0000