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authorTim Hutt <timothy.hutt@codasip.com>2024-05-14 16:14:14 +0100
committerAlasdair Armstrong <alasdair.armstrong@googlemail.com>2024-05-15 17:31:25 +0100
commita71fee30035e6d504b156cda0802902345766e70 (patch)
treec22a0d6a5004a90ac756a87de2899cb06848ba2f /model/riscv_insts_dext.sail
parente1242d851d6b27b357bfb31d46c8f08e18fb768b (diff)
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Handle 34-bit PMP address overflow
The existing PMP code could not handle physical addresses above 32 bits on RV32, which are possible since Sv32 has 34-bit physical addresses, and the PMP registers are in units of 4 bytes, so they can encode 34-bit addresses. This fixes that by delaying the *4 until the comparison where it can be done using `nat` instead of `xlenbits` which it would overflow.
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