On 2/28/09, Alexander Graf <alex(a)csgraf.de> wrote:
While booting a 64bit kernel, there is a small
timeframe where OF and the
kernel communicate with each other. Within that timeframe, DSI/ISI
interrupts may occur, because some memory is not mapped yet.
Right now in case that happens, we jump into the DSI/ISI interrupt handler
which clobbers the high 32 bits of the kernel's registers. In order to
circumvent that, let's save/restore all 64 bits of all kernel registers when
we get a DSI/ISI interrupt.
This patch enables a PPC64 Linux kernel to boot up to the point where it
tries to set up the SLB entries (slbmte), which is not yet implemented in
v2 implements handling for the HIOR register, bringing interrupt handlers to
Signed-off-by: Alexander Graf <alex(a)csgraf.de>