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-
-1. LEON3 emulation
-
-The file 'leon3.c' contains a model of simple LEON3 sub-system. It
-contains 16 Mbyte ROM and 16 Mbyte RAM. Standard peripherals
-such as interrupt controller, UART and timer are provided.
-The model can execute leon3 binaries that do not require an
-MMU.
-
-To start sis in Leon3 mode, add the -leon3 switch. In gdb,
-use 'target sim -leon3' .
-
-1.1 Multiprocessing
-
-It is possible to emulate an SMP leon3 system with up to 4 cores.
-Add the switch -m <n> when starting the simulator, where n can be 
-2 - 4. The cores are simulated in a round-robin fashion with a time-
-slice of 50 clocks. Shorter or longer time-slices can be selected
-using -d <clocks>/
-
-1.2 UART
-
-The UART emulates an APBUART and is located at address 0x80000100.
-The following registers are implemented:
-
-- UART RX and TX register	(0x80000100)
-- UART status register		(0x80000104)
-
-The UART generates interrupt 3.
-
-1.3 Timer unit (GPTIMER)
-
-The GPTIMER programmable counter is emulated and located at
-address 0x80000300. It is configured with two timers and separate
-interrupts (8 and 9).
-
-1.4 Interrupt controller
-
-The IRQMP interrupt controller is implemented as described in the
-GRLIB IP manual, with the exception of the interrupt level register.
-Extended interrupts are not supported. The registers are located
-at address 0x80000200.
-
-1.5 Memory interface
-
-The following memory areas are valid for the Leon3 simulator:
-
-0x00000000 - 0x01000000		ROM (16 Mbyte, loaded at start-up)
-0x40000000 - 0x41000000		RAM (16 Mbyte, loaded at start-up)
-0x80000000 - 0x81000000		APB bus, including plug&play
-0xFFFFF000 - 0xFFFFFFFF		AHB plug&play area
-
-Access to non-existing memory will result in a memory exception trap.
-
-1.6 Power-down mode
-
-The Leon3 power-down feature (%asr19) is supported. When power-down is
-entered, time is skipped forward until the next event in the event queue.
-Ctrl-C in the simulator window will exit the power-down mode.