[Qemu-devel] [PATCH 2/4] prep: add RS/6000 debug device

["Hervé Poussineau" <hpoussin@reactos.org>]

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
---
 default-configs/ppc-softmmu.mak |   1 +
 hw/ppc/Makefile.objs            |   1 +
 hw/ppc/rs6000_debug.c           | 260 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 262 insertions(+)
 create mode 100644 hw/ppc/rs6000_debug.c

diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.mak
index 4befde3..57f15e3 100644
--- a/default-configs/ppc-softmmu.mak
+++ b/default-configs/ppc-softmmu.mak
@@ -47,4 +47,5 @@ CONFIG_ETSEC=y
 CONFIG_LIBDECNUMBER=y
 # For PReP
 CONFIG_MC146818RTC=y
+CONFIG_RS6000_DEBUG=y
 CONFIG_ISA_TESTDEV=y
diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs
index 4369571..db7d467 100644
--- a/hw/ppc/Makefile.objs
+++ b/hw/ppc/Makefile.objs
@@ -13,6 +13,7 @@ obj-y += ppc4xx_pci.o
 # PReP
 obj-$(CONFIG_PREP) += prep.o
 obj-$(CONFIG_PREP) += prep_systemio.o
+obj-${CONFIG_RS6000_DEBUG} += rs6000_debug.o
 # OldWorld PowerMac
 obj-$(CONFIG_MAC) += mac_oldworld.o
 # NewWorld PowerMac
diff --git a/hw/ppc/rs6000_debug.c b/hw/ppc/rs6000_debug.c
new file mode 100644
index 0000000..5c53fa1
--- /dev/null
+++ b/hw/ppc/rs6000_debug.c
@@ -0,0 +1,260 @@
+/*
+ * QEMU IBM RS/6000 debug port emulation
+ *
+ * Copyright (c) 2015 Hervé Poussineau
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) version 3 or any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/isa/isa.h"
+#include "sysemu/char.h"
+
+#define TYPE_RS6000_DEBUG "rs6000-debug"
+#define RS6000(obj) \
+    OBJECT_CHECK(rs6000DebugState, (obj), TYPE_RS6000_DEBUG)
+
+static struct {
+    uint8_t code;
+    const char *message;
+} checkpoints[] = {
+    { 0x00, "Manufacturing - Reserved for Parallel port download protocol" },
+    { 0x01, "Clear the EPOW register 1. Memory modules 2. system board" },
+    { 0x02, "Determine system bus speed, set ISA advisor" },
+    { 0x04, "Set memory refresh" },
+    { 0x05, "Transfer control to Operating System ( normal boot )" },
+    { 0x06, "Jump to set environment or check flash" },
+    { 0x08, "Run recovery block base memory, test 2k, then set stack" },
+    { 0x09, "Copy CRC verification code to RAM" },
+    { 0x0A, "Turn on cache" },
+    { 0x0B, "Flush cache" },
+    { 0x0C, "Jump to CRC verification code in RAM" },
+    { 0x0D, "Compute composite image CRC" },
+    { 0x0E, "Jump back to ROM" },
+    { 0x0F, "Turn off cache" },
+    { 0x10, "Check if composite image CRC is valid" },
+    { 0x11, "Good CRC - jump to composite image" },
+    { 0x12, "Bad CRC - initialize base memory, stack" },
+    { 0x13, "Bad CRC - copy uncompressed recovery block code to RAM" },
+    { 0x14, "Bad CRC - jump to code in RAM" },
+    { 0x15, "Bad CRC - turn on cache" },
+    { 0x16, "Bad CRC - copy recovery block data section to RAM" },
+    { 0x17, "Bad CRC - invalidate and flush cache, set TOC" },
+    { 0x18, "Bad CRC - branch to high level recovery control routine" },
+    { 0x19, "Initialize base memory, stack" },
+    { 0x1A, "Copy uncompressed recovery block code to RAM" },
+    { 0x1B, "Jump to code in RAM" },
+    { 0x1C, "Turn on cache" },
+    { 0x1D, "Copy recovery block data section to RAM" },
+    { 0x1E, "Invalidate and flush cache, set TOC" },
+    { 0x1F, "Branch to high level control routine" },
+    { 0x20, "Initialize system I/O" },
+    { 0x21, "Run a console diagnostic routine" },
+    { 0x22, "No memory found" },
+    { 0x23, "No DIMM found in socket" },
+    { 0x24, "Remove bad DIMM found from DIMM information" },
+    { 0x25, "Unsupported DIMM detected" },
+    { 0x26, "Check valid image - start" },
+    { 0x27, "Check valid image - successful" },
+    { 0x28, "Wait for interrupt" },
+    { 0x29, "Transfers information to the business audio chip" },
+    { 0x2B, "Wait until sound chip has been initialized" },
+    { 0x2C, "Initialize the current input/pointer device" },
+    { 0x2D, "Initialize the current output" },
+    { 0x2E, "Register a console driver" },
+    { 0x30, "Set up early memory allocation heap, initialize Super I/O" },
+    { 0x31, "Determine system bus speed, set ISA driver" },
+    { 0x32, "Resync to SP (Console image)" },
+    { 0x33, "Set memory refresh" },
+    { 0x35, "Jump to set environment" },
+    { 0x40, "Initialize interrupt subsystem and 8259s" },
+    { 0x41, "SP command setup" },
+    { 0x42, "SP mailbox interface" },
+    { 0x43, "get_vpd entry" },
+    { 0x44, "init_sp entry" },
+    { 0x45, "sp_recovery -> resync SP & CPU" },
+    { 0x46, "IRQ13 stuck high  Bad System Board or Service Processor" },
+    { 0x47, "Entry to error checking routine-No system board VPD, bad CRC Bad System Board" },
+    { 0x48, "Power supply or system board problem" },
+    { 0x49, "Voltage problem, system board, power supply or CPU 5V" },
+    { 0x4A, "Voltage problem, system board or power supply 12V" },
+    { 0x4B, "CPU over temperature or bad system board" },
+    { 0x4C, "start bit-map display function" },
+    { 0x4D, "Bit-map file read into memory, start processing" },
+    { 0x4E, "End bit-map display function" },
+    { 0x4F, "IO/MEM over termperature or bad system board" },
+    { 0x50, "Initialize CMOS RTC periodic interrupt" },
+    { 0x51, "System board or system over temperature, CPU card Critical " },
+    { 0x52, "Bad system board (fan fail reported)" },
+    { 0x53, "Bad system board or Fans" },
+    { 0x54, "Fan fail warning" },
+    { 0x55, "Bad system board (unsupported EPOW)" },
+    { 0x56, "Voltage problem, system board, power supply or CPU 3.3V/2.5V" },
+    { 0x57, "Bad or low battery" },
+    { 0x58, "IRQ13 test failure" },
+    { 0x59, "EPOW test failure" },
+    { 0x5A, "Spurious IRQ6 interrupt (i.e. interrupt glitch)" },
+    { 0x5B, "Fan failure warning" },
+    { 0x5B, "Transfer control to Operating System ( service mode bootlist )" },
+    { 0x5C, "Clear EPOW register failure" },
+    { 0x5D, "Clear EPOW register failure" },
+    { 0x60, "Initialize keyboard/mouse controller, and password" },
+    { 0x61, "Extended memory initialization command" },
+    { 0x62, "Diskette initialization command" },
+    { 0x64, "Test of day routine" },
+    { 0x6A, "SCSI initialization command" },
+    { 0x70, "Initialize debugger" },
+    { 0x71, "Start checking whether CMOS contents are valid" },
+    { 0x72, "End checking whether CMOS contents are valid" },
+    { 0x73, "Dumps contents of CMOS data area to a file" },
+    { 0x74, "Establishing Host conmnection" },
+    { 0x75, "BootP request" },
+    { 0x77, "Resync to SP (Recvoery image)" },
+    { 0x79, "Dupms contents of NVRAM data area to a file" },
+    { 0x7A, "NVRAM initialization" },
+    { 0x7B, "Check NVRAM validity CRC" },
+    { 0x7C, "Loads contents of CMOS from file" },
+    { 0x80, "Initialize system call table" },
+    { 0x82, "Register a manager for use by the system" },
+    { 0x88, "Halt. System locked by error condition - power off" },
+    { 0x90, "Initialize VDISK file system" },
+    { 0x91, "Low-level initialize VDISK file systems" },
+    { 0x94, "Start SCSI initialization" },
+    { 0x96, "SCSI bus scan start" },
+    { 0x97, "SCSI polling interrupt" },
+    { 0x98, "SCSI device detected" },
+    { 0x9E, "Real Time clock RTC initialization" },
+    { 0x9F, "Exit SCSI initialization" },
+    { 0xA0, "Start resident monitor, run V:autoexec.6md" },
+    { 0xA1, "Enter resident monitor" },
+    { 0xA2, "Resident monitor process" },
+    { 0xA3, "Resident monitor process" },
+    { 0xA4, "Exit resident monitor" },
+    { 0xA5, "ASCII terminal initialization" },
+    { 0xA6, "ASCII terminal initialization exit" },
+    { 0xA9, "p9 driver initialization" },
+    { 0xAA, "p9 driver exit" },
+    { 0xAB, "Keyboard driver initialization" },
+    { 0xAC, "Keyboard driver exit" },
+    { 0xAD, "Mouse driver initialization" },
+    { 0xAE, "Mouse driver exit" },
+    { 0xB0, "Initialize rest of file system" },
+    { 0xB1, "Diskette initialization" },
+    { 0xB2, "Diskette drive type determination" },
+    { 0xB3, "Diskette initialization complete" },
+    { 0xC0, "Check if flash ROM OK" },
+    { 0xCA, "Build boot table - Networks" },
+    { 0xCB, "Build boot table - DASD" },
+    { 0xCC, "Build boot table - CDROM" },
+    { 0xCD, "Build boot table - diskettes" },
+    { 0xCE, "No operating system boot, exit normal boot sequence" },
+    { 0xD0, "Start of boot sequence" },
+    { 0xD2, "No operating system boot - ensure CMOS RTC periodic clock updates displayed" },
+    { 0xD4, "Initialize console for loading diagnostics" },
+    { 0xD8, "Exit from diagnostic - run resident monitor" },
+    { 0xDA, "IRQ15" },
+    { 0xDB, "Unexpected processor exception" },
+    { 0xDC, "Dynamic console selection" },
+    { 0xDD, "Early processor exception" },
+    { 0xDE, "Alternating pattern of FDE and FDA indicates a processor exception has been detected." },
+    { 0xE1, "Test timeout" },
+    { 0xE2, "Initialize system I/O" },
+    { 0xE4, "Initialize super I/O with default values" },
+    { 0xE6, "Set up early memory allocation heap" },
+    { 0xE8, "Initialize primary diskette drive in polled mode" },
+    { 0xEA, "Try to load in recovery image from diskette" },
+    { 0xEB, "Verify recovery image is valid" },
+    { 0xEC, "Get recovery image entry point" },
+    { 0xED, "Invalidate instruction cache" },
+    { 0xEE, "Jump to composite image" },
+    { 0xF0, "Manufacturing - Check for parallel port hook" },
+    { 0xF4, "Manufacturing - Start flag not received" },
+    { 0xF5, "Manufacturing - Invalid start flag received" },
+    { 0xF6, "Manufacturing - Receive character timeout" },
+    { 0xF7, "Manufacturing - CRC value mismatch" },
+    { 0xFA, "Error during flash update" },
+    { 0xFC, "Operating system boot - no errors reported by IPL ROS" },
+    { 0xFD, "Operating system boot - non-critical errors reported by IPL ROS" },
+    { 0xFE, "No boot - critical error(s) reported by IPL ROS -or- F1 key pressed" },
+    { 0, NULL },
+};
+
+typedef struct rs6000DebugState {
+    ISADevice parent_obj;
+    MemoryRegion io;
+    CharDriverState *chr;
+} rs6000DebugState;
+
+static void rs6000_debug_write(void *opaque, hwaddr addr, uint64_t val,
+                               unsigned int size)
+{
+    rs6000DebugState *s = opaque;
+    uint8_t code = val & 0xff;
+    int i = 0;
+
+    while (checkpoints[i].message) {
+        if (checkpoints[i].code == code) {
+            qemu_chr_fe_printf(s->chr, "%s\r\n",
+                               checkpoints[i].message);
+            return;
+        }
+        i++;
+    }
+
+    qemu_chr_fe_printf(s->chr, "unknown code 0x%02x\r\n", code);
+}
+
+static const MemoryRegionOps rs6000_debug_ops = {
+    .write = rs6000_debug_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void rs6000_debug_realize(DeviceState *dev, Error **errp)
+{
+    rs6000DebugState *s = RS6000(dev);
+
+    if (!s->chr) {
+        s->chr = qemu_chr_new("rs6000_debug", "vc", NULL);
+    }
+
+    memory_region_init_io(&s->io, OBJECT(dev), &rs6000_debug_ops, s,
+                          "rs6000-debug", 4);
+    isa_register_ioport(ISA_DEVICE(dev), &s->io, 0x680);
+}
+
+static Property rs6000_debug_properties[] = {
+    DEFINE_PROP_CHR("chardev", rs6000DebugState, chr),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void rs6000_debug_class_initfn(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = rs6000_debug_realize;
+    dc->props = rs6000_debug_properties;
+}
+
+static TypeInfo rs6000_debug_isa_info = {
+    .name          = TYPE_RS6000_DEBUG,
+    .parent        = TYPE_ISA_DEVICE,
+    .instance_size = sizeof(rs6000DebugState),
+    .class_init    = rs6000_debug_class_initfn,
+};
+
+static void rs6000_debug_register_types(void)
+{
+    type_register_static(&rs6000_debug_isa_info);
+}
+
+type_init(rs6000_debug_register_types)
-- 
2.1.4