The Miscellaneous Special Registers Option provides zero to four scratch
registers within the processor readable and writable by RSR, WSR, and
XSR. These registers are privileged. They may be useful for some
application-specific exception and interrupt processing tasks in the
kernel. The MISC registers are undefined after reset.
See ISA, 4.7.3 for details.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Beginning with the RA-2004.1 release, SR access instructions (rsr, wsr,
xsr) are associated with their corresponding SR and raise illegal opcode
exception in case the register is not configured for the core.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
In XEA1, the Options for Memory Protection and Translation and the
corresponding TLB management instructions are not available. Instead,
functionality similar to the Region Protection Option is available
through the cache attribute register. See ISA, A.2.14 for details.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
ATOMCTL SR controls s32c1i opcode behavior depending on targeted memory
type. See ISA, 4.3.12.4 for details.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Fill debug configuration from overlay definitions in the DEBUG_SECTION.
Add DEBUG_SECTION to DC232B and FSF cores.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
TLB_TEMPLATE macro specifies TLB geometry in the core configuration.
Make TLB_TEMPLATE available for region protection core variants,
defining 1 way ITLB and DTLB with 8 entries each.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
- ITLB/DTLB ways 5 and 6 have 4 and 8 entries respectively;
- ITLB/DTLB way 6 attr field is set to 3 on reset.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Introduce overlay_tool.h that defines core configuration blocks from
data available in the linux architecture variant overlay.
Overlay data is automatically generated in the core configuration
process by Tensilica tools and can be directly converted to qemu xtensa
core description by overlay_tool.h
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
