PMP grain used as immediate when it can be more than 12 bits

[henrikg-qc]

PMP tests do not compile when PMP grain is greater than 9

For PMP tests the PMP grain is used with:
#define g (1 << (RVMODEL_PMP_GRAIN + 2))

The macro g is used in several places as argument to addi instruction. When Grain is greater than 9 the instruction cannot be encoded.

To Reproduce
Set RVMODEL_PMP_GRAIN greater than 9
Ex. in rvtest_config.h
#define RVMODEL_PMP_GRAIN 12

run make for the test config

error: PMPSm/pmpsm_misaligned_tor.S:182: Error: illegal operands `addi x5,x4,(1<<(12+2))

This is widespread throughout PMP tests and should be reviewed for correctness both in loading the corrected grain and use for tests.

[jordancarlin]

@hamza-1821 can you please look into this?

[Jjateen]

@hamza-1821 @jordancarlin I've submitted a fix, can you look into it?

[hamza-1821]

@hamza-1821 @jordancarlin I've submitted a fix, can you look into it?

Yes, seems good. Something similiar was also done for other PMP extensions as well. @jordancarlin I think we're good to go.