freebsd-skq/sys/mips/gxemul/files.gxemul

# $FreeBSD$
dev/gxemul/cons/gxemul_cons.c		optional gxemul_cons
mips/gxemul/gxemul_machdep.c		standard
mips/mips/intr_machdep.c		standard
mips/mips/tick.c			standard
Merge a rudimentary gxemul "oldtestmips" port. This consists almost entirely of one machdep file lifted from the MALTA port, as well as a low-level console and tty driver for the gxemul debugging console device (the emulators stdio). As with many low-level embedded and hypervisor console devices, it is polled only, so we drive TTY I/O from a callout; we are perhaps a bit too aware of the MIPS physical maps in order to attach the console before newbus comes to life. The sample kernel configuration depends on an MD-based root file system, which is not provided. However, any 64-bit, big-endian userspace image (such as one generated for MALTA) should work. This will hopefully be supplemented by additional device drivers for gxemul-specific hardware simulations from Juli Mallett. We have found oldtestmips quite useful for testing and improving aspects of the MIPS port, so it's worth supporting better in FreeBSD. Requested by: theraven, jmallett Sponsored by: DARPA, AFRL MFC after: 3 weeks 2012-05-02 08:10:15 +00:00			`# $FreeBSD$`
			`dev/gxemul/cons/gxemul_cons.c optional gxemul_cons`
			`mips/gxemul/gxemul_machdep.c standard`
			`mips/mips/intr_machdep.c standard`
			`mips/mips/tick.c standard`