Stafford Horne f4d1414a93 target/openrisc: Support non-busy idle state using PMR SPR ... The OpenRISC architecture has the Power Management Register (PMR) special purpose register to manage cpu power states. The interesting modes are: * Doze Mode (DME) - Stop cpu except timer & pic - wake on interrupt * Sleep Mode (SME) - Stop cpu and all units - wake on interrupt * Suspend Model (SUME) - Stop cpu and all units - wake on reset The linux kernel will set DME when idle. This patch implements the PMR SPR and halts the qemu cpu when there is a change to DME or SME. This means that openrisc qemu in no longer peggs a host cpu at 100%. In order for this to work we need to kick the CPU when timers are expired. Update the cpu timer to kick the cpu upon each timer event. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Stafford Horne <shorne@gmail.com>		2017-05-04 09:39:14 +09:00
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cputimer.c	target/openrisc: Support non-busy idle state using PMR SPR	2017-05-04 09:39:14 +09:00
Makefile.objs	hw: move boards and other isolated files to hw/ARCH	2013-03-01 15:01:19 +01:00
openrisc_sim.c	target/openrisc: Rename the cpu from or32 to or1k	2017-02-14 08:14:58 +11:00
pic_cpu.c	openrisc: Clean up includes	2016-01-29 15:07:24 +00:00