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[rtl] Fix PMP NAPOT matching for 0 PMPGranularity

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This commit is contained in:
Greg Chadwick 2021-01-11 16:36:07 +00:00
parent d315c38527
commit 6a61e0ec0c
1 changed files with 7 additions and 2 deletions
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9
rtl/ibex_pmp.sv
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@ -64,8 +64,13 @@ module ibex_pmp #(
// ^
// | This bit pos is the top of the mask, all lower bits set
// thus mask = 1111 0000
assign region_addr_mask[r][b] = (csr_pmp_cfg_i[r].mode != PMP_MODE_NAPOT) |
~&csr_pmp_addr_i[r][b-1:PMPGranularity+1];
if (PMPGranularity == 0) begin : g_region_addr_mask_zero_granularity
assign region_addr_mask[r][b] = (csr_pmp_cfg_i[r].mode != PMP_MODE_NAPOT) |
~&csr_pmp_addr_i[r][b-1:2];
end else begin : g_region_addr_mask_other_granularity
assign region_addr_mask[r][b] = (csr_pmp_cfg_i[r].mode != PMP_MODE_NAPOT) |
~&csr_pmp_addr_i[r][b-1:PMPGranularity+1];
end
end
end
end