qemu-doc: split target sections to separate files

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200228153619.9906-9-peter.maydell@linaro.org
Message-id: 20200226113034.6741-9-pbonzini@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

8 files changed, 845 insertions, 0 deletions

diff --git a/docs/system/target-arm.texi b/docs/system/target-arm.texi
new file mode 100644
index 0000000000..040d77b5e0
--- /dev/null
+++ b/docs/system/target-arm.texi
@@ -0,0 +1,264 @@
+@node ARM System emulator
+@section ARM System emulator
+@cindex system emulation (ARM)
+
+Use the executable @file{qemu-system-arm} to simulate a ARM
+machine. The ARM Integrator/CP board is emulated with the following
+devices:
+
+@itemize @minus
+@item
+ARM926E, ARM1026E, ARM946E, ARM1136 or Cortex-A8 CPU
+@item
+Two PL011 UARTs
+@item
+SMC 91c111 Ethernet adapter
+@item
+PL110 LCD controller
+@item
+PL050 KMI with PS/2 keyboard and mouse.
+@item
+PL181 MultiMedia Card Interface with SD card.
+@end itemize
+
+The ARM Versatile baseboard is emulated with the following devices:
+
+@itemize @minus
+@item
+ARM926E, ARM1136 or Cortex-A8 CPU
+@item
+PL190 Vectored Interrupt Controller
+@item
+Four PL011 UARTs
+@item
+SMC 91c111 Ethernet adapter
+@item
+PL110 LCD controller
+@item
+PL050 KMI with PS/2 keyboard and mouse.
+@item
+PCI host bridge.  Note the emulated PCI bridge only provides access to
+PCI memory space.  It does not provide access to PCI IO space.
+This means some devices (eg. ne2k_pci NIC) are not usable, and others
+(eg. rtl8139 NIC) are only usable when the guest drivers use the memory
+mapped control registers.
+@item
+PCI OHCI USB controller.
+@item
+LSI53C895A PCI SCSI Host Bus Adapter with hard disk and CD-ROM devices.
+@item
+PL181 MultiMedia Card Interface with SD card.
+@end itemize
+
+Several variants of the ARM RealView baseboard are emulated,
+including the EB, PB-A8 and PBX-A9.  Due to interactions with the
+bootloader, only certain Linux kernel configurations work out
+of the box on these boards.
+
+Kernels for the PB-A8 board should have CONFIG_REALVIEW_HIGH_PHYS_OFFSET
+enabled in the kernel, and expect 512M RAM.  Kernels for The PBX-A9 board
+should have CONFIG_SPARSEMEM enabled, CONFIG_REALVIEW_HIGH_PHYS_OFFSET
+disabled and expect 1024M RAM.
+
+The following devices are emulated:
+
+@itemize @minus
+@item
+ARM926E, ARM1136, ARM11MPCore, Cortex-A8 or Cortex-A9 MPCore CPU
+@item
+ARM AMBA Generic/Distributed Interrupt Controller
+@item
+Four PL011 UARTs
+@item
+SMC 91c111 or SMSC LAN9118 Ethernet adapter
+@item
+PL110 LCD controller
+@item
+PL050 KMI with PS/2 keyboard and mouse
+@item
+PCI host bridge
+@item
+PCI OHCI USB controller
+@item
+LSI53C895A PCI SCSI Host Bus Adapter with hard disk and CD-ROM devices
+@item
+PL181 MultiMedia Card Interface with SD card.
+@end itemize
+
+The XScale-based clamshell PDA models ("Spitz", "Akita", "Borzoi"
+and "Terrier") emulation includes the following peripherals:
+
+@itemize @minus
+@item
+Intel PXA270 System-on-chip (ARM V5TE core)
+@item
+NAND Flash memory
+@item
+IBM/Hitachi DSCM microdrive in a PXA PCMCIA slot - not in "Akita"
+@item
+On-chip OHCI USB controller
+@item
+On-chip LCD controller
+@item
+On-chip Real Time Clock
+@item
+TI ADS7846 touchscreen controller on SSP bus
+@item
+Maxim MAX1111 analog-digital converter on I@math{^2}C bus
+@item
+GPIO-connected keyboard controller and LEDs
+@item
+Secure Digital card connected to PXA MMC/SD host
+@item
+Three on-chip UARTs
+@item
+WM8750 audio CODEC on I@math{^2}C and I@math{^2}S busses
+@end itemize
+
+The Palm Tungsten|E PDA (codename "Cheetah") emulation includes the
+following elements:
+
+@itemize @minus
+@item
+Texas Instruments OMAP310 System-on-chip (ARM 925T core)
+@item
+ROM and RAM memories (ROM firmware image can be loaded with -option-rom)
+@item
+On-chip LCD controller
+@item
+On-chip Real Time Clock
+@item
+TI TSC2102i touchscreen controller / analog-digital converter / Audio
+CODEC, connected through MicroWire and I@math{^2}S busses
+@item
+GPIO-connected matrix keypad
+@item
+Secure Digital card connected to OMAP MMC/SD host
+@item
+Three on-chip UARTs
+@end itemize
+
+Nokia N800 and N810 internet tablets (known also as RX-34 and RX-44 / 48)
+emulation supports the following elements:
+
+@itemize @minus
+@item
+Texas Instruments OMAP2420 System-on-chip (ARM 1136 core)
+@item
+RAM and non-volatile OneNAND Flash memories
+@item
+Display connected to EPSON remote framebuffer chip and OMAP on-chip
+display controller and a LS041y3 MIPI DBI-C controller
+@item
+TI TSC2301 (in N800) and TI TSC2005 (in N810) touchscreen controllers
+driven through SPI bus
+@item
+National Semiconductor LM8323-controlled qwerty keyboard driven
+through I@math{^2}C bus
+@item
+Secure Digital card connected to OMAP MMC/SD host
+@item
+Three OMAP on-chip UARTs and on-chip STI debugging console
+@item
+Mentor Graphics "Inventra" dual-role USB controller embedded in a TI
+TUSB6010 chip - only USB host mode is supported
+@item
+TI TMP105 temperature sensor driven through I@math{^2}C bus
+@item
+TI TWL92230C power management companion with an RTC on I@math{^2}C bus
+@item
+Nokia RETU and TAHVO multi-purpose chips with an RTC, connected
+through CBUS
+@end itemize
+
+The Luminary Micro Stellaris LM3S811EVB emulation includes the following
+devices:
+
+@itemize @minus
+@item
+Cortex-M3 CPU core.
+@item
+64k Flash and 8k SRAM.
+@item
+Timers, UARTs, ADC and I@math{^2}C interface.
+@item
+OSRAM Pictiva 96x16 OLED with SSD0303 controller on I@math{^2}C bus.
+@end itemize
+
+The Luminary Micro Stellaris LM3S6965EVB emulation includes the following
+devices:
+
+@itemize @minus
+@item
+Cortex-M3 CPU core.
+@item
+256k Flash and 64k SRAM.
+@item
+Timers, UARTs, ADC, I@math{^2}C and SSI interfaces.
+@item
+OSRAM Pictiva 128x64 OLED with SSD0323 controller connected via SSI.
+@end itemize
+
+The Freecom MusicPal internet radio emulation includes the following
+elements:
+
+@itemize @minus
+@item
+Marvell MV88W8618 ARM core.
+@item
+32 MB RAM, 256 KB SRAM, 8 MB flash.
+@item
+Up to 2 16550 UARTs
+@item
+MV88W8xx8 Ethernet controller
+@item
+MV88W8618 audio controller, WM8750 CODEC and mixer
+@item
+128×64 display with brightness control
+@item
+2 buttons, 2 navigation wheels with button function
+@end itemize
+
+The Siemens SX1 models v1 and v2 (default) basic emulation.
+The emulation includes the following elements:
+
+@itemize @minus
+@item
+Texas Instruments OMAP310 System-on-chip (ARM 925T core)
+@item
+ROM and RAM memories (ROM firmware image can be loaded with -pflash)
+V1
+1 Flash of 16MB and 1 Flash of 8MB
+V2
+1 Flash of 32MB
+@item
+On-chip LCD controller
+@item
+On-chip Real Time Clock
+@item
+Secure Digital card connected to OMAP MMC/SD host
+@item
+Three on-chip UARTs
+@end itemize
+
+A Linux 2.6 test image is available on the QEMU web site. More
+information is available in the QEMU mailing-list archive.
+
+@c man begin OPTIONS
+
+The following options are specific to the ARM emulation:
+
+@table @option
+
+@item -semihosting
+Enable semihosting syscall emulation.
+
+On ARM this implements the "Angel" interface.
+
+Note that this allows guest direct access to the host filesystem,
+so should only be used with trusted guest OS.
+
+@end table
+
+@c man end
+
diff --git a/docs/system/target-i386.texi b/docs/system/target-i386.texi
new file mode 100644
index 0000000000..edd23fa8df
--- /dev/null
+++ b/docs/system/target-i386.texi
@@ -0,0 +1,92 @@
+@node x86 (PC) System emulator
+@section x86 (PC) System emulator
+@cindex system emulation (PC)
+
+@menu
+* pcsys_devices::      Peripherals
+* cpu_models_x86::     CPU models
+* pcsys_req::          OS requirements
+@end menu
+
+@node pcsys_devices
+@subsection Peripherals
+
+@c man begin DESCRIPTION
+
+The QEMU PC System emulator simulates the following peripherals:
+
+@itemize @minus
+@item
+i440FX host PCI bridge and PIIX3 PCI to ISA bridge
+@item
+Cirrus CLGD 5446 PCI VGA card or dummy VGA card with Bochs VESA
+extensions (hardware level, including all non standard modes).
+@item
+PS/2 mouse and keyboard
+@item
+2 PCI IDE interfaces with hard disk and CD-ROM support
+@item
+Floppy disk
+@item
+PCI and ISA network adapters
+@item
+Serial ports
+@item
+IPMI BMC, either and internal or external one
+@item
+Creative SoundBlaster 16 sound card
+@item
+ENSONIQ AudioPCI ES1370 sound card
+@item
+Intel 82801AA AC97 Audio compatible sound card
+@item
+Intel HD Audio Controller and HDA codec
+@item
+Adlib (OPL2) - Yamaha YM3812 compatible chip
+@item
+Gravis Ultrasound GF1 sound card
+@item
+CS4231A compatible sound card
+@item
+PCI UHCI, OHCI, EHCI or XHCI USB controller and a virtual USB-1.1 hub.
+@end itemize
+
+SMP is supported with up to 255 CPUs.
+
+QEMU uses the PC BIOS from the Seabios project and the Plex86/Bochs LGPL
+VGA BIOS.
+
+QEMU uses YM3812 emulation by Tatsuyuki Satoh.
+
+QEMU uses GUS emulation (GUSEMU32 @url{http://www.deinmeister.de/gusemu/})
+by Tibor "TS" Schütz.
+
+Note that, by default, GUS shares IRQ(7) with parallel ports and so
+QEMU must be told to not have parallel ports to have working GUS.
+
+@example
+@value{qemu_system_x86} dos.img -soundhw gus -parallel none
+@end example
+
+Alternatively:
+@example
+@value{qemu_system_x86} dos.img -device gus,irq=5
+@end example
+
+Or some other unclaimed IRQ.
+
+CS4231A is the chip used in Windows Sound System and GUSMAX products
+
+@c man end
+
+@lowersections
+@include docs/system/cpu-models-x86.texi
+@raisesections
+
+@node pcsys_req
+@subsection OS requirements
+
+On x86_64 hosts, the default set of CPU features enabled by the KVM accelerator
+require the host to be running Linux v4.5 or newer.  Red Hat Enterprise Linux
+7 is also supported, since the required functionality was backported.
+
diff --git a/docs/system/target-m68k.texi b/docs/system/target-m68k.texi
new file mode 100644
index 0000000000..b5bc9df40a
--- /dev/null
+++ b/docs/system/target-m68k.texi
@@ -0,0 +1,46 @@
+@node ColdFire System emulator
+@section ColdFire System emulator
+@cindex system emulation (ColdFire)
+@cindex system emulation (M68K)
+
+Use the executable @file{qemu-system-m68k} to simulate a ColdFire machine.
+The emulator is able to boot a uClinux kernel.
+
+The M5208EVB emulation includes the following devices:
+
+@itemize @minus
+@item
+MCF5208 ColdFire V2 Microprocessor (ISA A+ with EMAC).
+@item
+Three Two on-chip UARTs.
+@item
+Fast Ethernet Controller (FEC)
+@end itemize
+
+The AN5206 emulation includes the following devices:
+
+@itemize @minus
+@item
+MCF5206 ColdFire V2 Microprocessor.
+@item
+Two on-chip UARTs.
+@end itemize
+
+@c man begin OPTIONS
+
+The following options are specific to the ColdFire emulation:
+
+@table @option
+
+@item -semihosting
+Enable semihosting syscall emulation.
+
+On M68K this implements the "ColdFire GDB" interface used by libgloss.
+
+Note that this allows guest direct access to the host filesystem,
+so should only be used with trusted guest OS.
+
+@end table
+
+@c man end
+
diff --git a/docs/system/target-mips.texi b/docs/system/target-mips.texi
new file mode 100644
index 0000000000..f722c00912
--- /dev/null
+++ b/docs/system/target-mips.texi
@@ -0,0 +1,152 @@
+@node MIPS System emulator
+@section MIPS System emulator
+@cindex system emulation (MIPS)
+
+@menu
+* recommendations_cpu_models_MIPS:: Supported CPU model configurations on MIPS hosts
+* nanoMIPS System emulator ::
+@end menu
+
+Four executables cover simulation of 32 and 64-bit MIPS systems in
+both endian options, @file{qemu-system-mips}, @file{qemu-system-mipsel}
+@file{qemu-system-mips64} and @file{qemu-system-mips64el}.
+Five different machine types are emulated:
+
+@itemize @minus
+@item
+A generic ISA PC-like machine "mips"
+@item
+The MIPS Malta prototype board "malta"
+@item
+An ACER Pica "pica61". This machine needs the 64-bit emulator.
+@item
+MIPS emulator pseudo board "mipssim"
+@item
+A MIPS Magnum R4000 machine "magnum". This machine needs the 64-bit emulator.
+@end itemize
+
+The generic emulation is supported by Debian 'Etch' and is able to
+install Debian into a virtual disk image. The following devices are
+emulated:
+
+@itemize @minus
+@item
+A range of MIPS CPUs, default is the 24Kf
+@item
+PC style serial port
+@item
+PC style IDE disk
+@item
+NE2000 network card
+@end itemize
+
+The Malta emulation supports the following devices:
+
+@itemize @minus
+@item
+Core board with MIPS 24Kf CPU and Galileo system controller
+@item
+PIIX4 PCI/USB/SMbus controller
+@item
+The Multi-I/O chip's serial device
+@item
+PCI network cards (PCnet32 and others)
+@item
+Malta FPGA serial device
+@item
+Cirrus (default) or any other PCI VGA graphics card
+@end itemize
+
+The Boston board emulation supports the following devices:
+
+@itemize @minus
+@item
+Xilinx FPGA, which includes a PCIe root port and an UART
+@item
+Intel EG20T PCH connects the I/O peripherals, but only the SATA bus is emulated
+@end itemize
+
+The ACER Pica emulation supports:
+
+@itemize @minus
+@item
+MIPS R4000 CPU
+@item
+PC-style IRQ and DMA controllers
+@item
+PC Keyboard
+@item
+IDE controller
+@end itemize
+
+The MIPS Magnum R4000 emulation supports:
+
+@itemize @minus
+@item
+MIPS R4000 CPU
+@item
+PC-style IRQ controller
+@item
+PC Keyboard
+@item
+SCSI controller
+@item
+G364 framebuffer
+@end itemize
+
+The Fulong 2E emulation supports:
+
+@itemize @minus
+@item
+Loongson 2E CPU
+@item
+Bonito64 system controller as North Bridge
+@item
+VT82C686 chipset as South Bridge
+@item
+RTL8139D as a network card chipset
+@end itemize
+
+The mipssim pseudo board emulation provides an environment similar
+to what the proprietary MIPS emulator uses for running Linux.
+It supports:
+
+@itemize @minus
+@item
+A range of MIPS CPUs, default is the 24Kf
+@item
+PC style serial port
+@item
+MIPSnet network emulation
+@end itemize
+
+@lowersections
+@include docs/system/cpu-models-mips.texi
+@raisesections
+
+@node nanoMIPS System emulator
+@subsection nanoMIPS System emulator
+@cindex system emulation (nanoMIPS)
+
+Executable @file{qemu-system-mipsel} also covers simulation of
+32-bit nanoMIPS system in little endian mode:
+
+@itemize @minus
+@item
+nanoMIPS I7200 CPU
+@end itemize
+
+Example of @file{qemu-system-mipsel} usage for nanoMIPS is shown below:
+
+Download @code{<disk_image_file>} from @url{https://mipsdistros.mips.com/LinuxDistro/nanomips/buildroot/index.html}.
+
+Download @code{<kernel_image_file>} from @url{https://mipsdistros.mips.com/LinuxDistro/nanomips/kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/index.html}.
+
+Start system emulation of Malta board with nanoMIPS I7200 CPU:
+@example
+qemu-system-mipsel -cpu I7200 -kernel @code{<kernel_image_file>} \
+    -M malta -serial stdio -m @code{<memory_size>} -hda @code{<disk_image_file>} \
+    -append "mem=256m@@0x0 rw console=ttyS0 vga=cirrus vesa=0x111 root=/dev/sda"
+@end example
+
+
diff --git a/docs/system/target-ppc.texi b/docs/system/target-ppc.texi
new file mode 100644
index 0000000000..c2c254d3d2
--- /dev/null
+++ b/docs/system/target-ppc.texi
@@ -0,0 +1,78 @@
+@node PowerPC System emulator
+@section PowerPC System emulator
+@cindex system emulation (PowerPC)
+
+Use the executable @file{qemu-system-ppc} to simulate a complete 40P (PREP)
+or PowerMac PowerPC system.
+
+QEMU emulates the following PowerMac peripherals:
+
+@itemize @minus
+@item
+UniNorth or Grackle PCI Bridge
+@item
+PCI VGA compatible card with VESA Bochs Extensions
+@item
+2 PMAC IDE interfaces with hard disk and CD-ROM support
+@item
+NE2000 PCI adapters
+@item
+Non Volatile RAM
+@item
+VIA-CUDA with ADB keyboard and mouse.
+@end itemize
+
+QEMU emulates the following 40P (PREP) peripherals:
+
+@itemize @minus
+@item
+PCI Bridge
+@item
+PCI VGA compatible card with VESA Bochs Extensions
+@item
+2 IDE interfaces with hard disk and CD-ROM support
+@item
+Floppy disk
+@item
+PCnet network adapters
+@item
+Serial port
+@item
+PREP Non Volatile RAM
+@item
+PC compatible keyboard and mouse.
+@end itemize
+
+Since version 0.9.1, QEMU uses OpenBIOS @url{https://www.openbios.org/}
+for the g3beige and mac99 PowerMac and the 40p machines. OpenBIOS is a free
+(GPL v2) portable firmware implementation. The goal is to implement a 100%
+IEEE 1275-1994 (referred to as Open Firmware) compliant firmware.
+
+@c man begin OPTIONS
+
+The following options are specific to the PowerPC emulation:
+
+@table @option
+
+@item -g @var{W}x@var{H}[x@var{DEPTH}]
+
+Set the initial VGA graphic mode. The default is 800x600x32.
+
+@item -prom-env @var{string}
+
+Set OpenBIOS variables in NVRAM, for example:
+
+@example
+qemu-system-ppc -prom-env 'auto-boot?=false' \
+ -prom-env 'boot-device=hd:2,\yaboot' \
+ -prom-env 'boot-args=conf=hd:2,\yaboot.conf'
+@end example
+
+@end table
+
+@c man end
+
+
+More information is available at
+@url{http://perso.magic.fr/l_indien/qemu-ppc/}.
+
diff --git a/docs/system/target-sparc.texi b/docs/system/target-sparc.texi
new file mode 100644
index 0000000000..7fe0aec9c3
--- /dev/null
+++ b/docs/system/target-sparc.texi
@@ -0,0 +1,96 @@
+@node Sparc32 System emulator
+@section Sparc32 System emulator
+@cindex system emulation (Sparc32)
+
+Use the executable @file{qemu-system-sparc} to simulate the following
+Sun4m architecture machines:
+@itemize @minus
+@item
+SPARCstation 4
+@item
+SPARCstation 5
+@item
+SPARCstation 10
+@item
+SPARCstation 20
+@item
+SPARCserver 600MP
+@item
+SPARCstation LX
+@item
+SPARCstation Voyager
+@item
+SPARCclassic
+@item
+SPARCbook
+@end itemize
+
+The emulation is somewhat complete. SMP up to 16 CPUs is supported,
+but Linux limits the number of usable CPUs to 4.
+
+QEMU emulates the following sun4m peripherals:
+
+@itemize @minus
+@item
+IOMMU
+@item
+TCX or cgthree Frame buffer
+@item
+Lance (Am7990) Ethernet
+@item
+Non Volatile RAM M48T02/M48T08
+@item
+Slave I/O: timers, interrupt controllers, Zilog serial ports, keyboard
+and power/reset logic
+@item
+ESP SCSI controller with hard disk and CD-ROM support
+@item
+Floppy drive (not on SS-600MP)
+@item
+CS4231 sound device (only on SS-5, not working yet)
+@end itemize
+
+The number of peripherals is fixed in the architecture.  Maximum
+memory size depends on the machine type, for SS-5 it is 256MB and for
+others 2047MB.
+
+Since version 0.8.2, QEMU uses OpenBIOS
+@url{https://www.openbios.org/}. OpenBIOS is a free (GPL v2) portable
+firmware implementation. The goal is to implement a 100% IEEE
+1275-1994 (referred to as Open Firmware) compliant firmware.
+
+A sample Linux 2.6 series kernel and ram disk image are available on
+the QEMU web site. There are still issues with NetBSD and OpenBSD, but
+most kernel versions work. Please note that currently older Solaris kernels
+don't work probably due to interface issues between OpenBIOS and
+Solaris.
+
+@c man begin OPTIONS
+
+The following options are specific to the Sparc32 emulation:
+
+@table @option
+
+@item -g @var{W}x@var{H}x[x@var{DEPTH}]
+
+Set the initial graphics mode. For TCX, the default is 1024x768x8 with the
+option of 1024x768x24. For cgthree, the default is 1024x768x8 with the option
+of 1152x900x8 for people who wish to use OBP.
+
+@item -prom-env @var{string}
+
+Set OpenBIOS variables in NVRAM, for example:
+
+@example
+qemu-system-sparc -prom-env 'auto-boot?=false' \
+ -prom-env 'boot-device=sd(0,2,0):d' -prom-env 'boot-args=linux single'
+@end example
+
+@item -M [SS-4|SS-5|SS-10|SS-20|SS-600MP|LX|Voyager|SPARCClassic] [|SPARCbook]
+
+Set the emulated machine type. Default is SS-5.
+
+@end table
+
+@c man end
+
diff --git a/docs/system/target-sparc64.texi b/docs/system/target-sparc64.texi
new file mode 100644
index 0000000000..9e7a27de0c
--- /dev/null
+++ b/docs/system/target-sparc64.texi
@@ -0,0 +1,61 @@
+@node Sparc64 System emulator
+@section Sparc64 System emulator
+@cindex system emulation (Sparc64)
+
+Use the executable @file{qemu-system-sparc64} to simulate a Sun4u
+(UltraSPARC PC-like machine), Sun4v (T1 PC-like machine), or generic
+Niagara (T1) machine. The Sun4u emulator is mostly complete, being
+able to run Linux, NetBSD and OpenBSD in headless (-nographic) mode. The
+Sun4v emulator is still a work in progress.
+
+The Niagara T1 emulator makes use of firmware and OS binaries supplied in the S10image/ directory
+of the OpenSPARC T1 project @url{http://download.oracle.com/technetwork/systems/opensparc/OpenSPARCT1_Arch.1.5.tar.bz2}
+and is able to boot the disk.s10hw2 Solaris image.
+@example
+qemu-system-sparc64 -M niagara -L /path-to/S10image/ \
+                    -nographic -m 256 \
+                    -drive if=pflash,readonly=on,file=/S10image/disk.s10hw2
+@end example
+
+
+QEMU emulates the following peripherals:
+
+@itemize @minus
+@item
+UltraSparc IIi APB PCI Bridge
+@item
+PCI VGA compatible card with VESA Bochs Extensions
+@item
+PS/2 mouse and keyboard
+@item
+Non Volatile RAM M48T59
+@item
+PC-compatible serial ports
+@item
+2 PCI IDE interfaces with hard disk and CD-ROM support
+@item
+Floppy disk
+@end itemize
+
+@c man begin OPTIONS
+
+The following options are specific to the Sparc64 emulation:
+
+@table @option
+
+@item -prom-env @var{string}
+
+Set OpenBIOS variables in NVRAM, for example:
+
+@example
+qemu-system-sparc64 -prom-env 'auto-boot?=false'
+@end example
+
+@item -M [sun4u|sun4v|niagara]
+
+Set the emulated machine type. The default is sun4u.
+
+@end table
+
+@c man end
+
diff --git a/docs/system/target-xtensa.texi b/docs/system/target-xtensa.texi
new file mode 100644
index 0000000000..08b0b36299
--- /dev/null
+++ b/docs/system/target-xtensa.texi
@@ -0,0 +1,56 @@
+@node Xtensa System emulator
+@section Xtensa System emulator
+@cindex system emulation (Xtensa)
+
+Two executables cover simulation of both Xtensa endian options,
+@file{qemu-system-xtensa} and @file{qemu-system-xtensaeb}.
+Two different machine types are emulated:
+
+@itemize @minus
+@item
+Xtensa emulator pseudo board "sim"
+@item
+Avnet LX60/LX110/LX200 board
+@end itemize
+
+The sim pseudo board emulation provides an environment similar
+to one provided by the proprietary Tensilica ISS.
+It supports:
+
+@itemize @minus
+@item
+A range of Xtensa CPUs, default is the DC232B
+@item
+Console and filesystem access via semihosting calls
+@end itemize
+
+The Avnet LX60/LX110/LX200 emulation supports:
+
+@itemize @minus
+@item
+A range of Xtensa CPUs, default is the DC232B
+@item
+16550 UART
+@item
+OpenCores 10/100 Mbps Ethernet MAC
+@end itemize
+
+@c man begin OPTIONS
+
+The following options are specific to the Xtensa emulation:
+
+@table @option
+
+@item -semihosting
+Enable semihosting syscall emulation.
+
+Xtensa semihosting provides basic file IO calls, such as open/read/write/seek/select.
+Tensilica baremetal libc for ISS and linux platform "sim" use this interface.
+
+Note that this allows guest direct access to the host filesystem,
+so should only be used with trusted guest OS.
+
+@end table
+
+@c man end
+