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[rtl] Split pmp_req_err_o logic to allow easier binding for fcov

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Harry Callahan 2025-06-20 11:05:09 +01:00
parent db07ab174e
commit 0613e7850c
1 changed files with 9 additions and 8 deletions
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7
rtl/ibex_pmp.sv
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@ -41,6 +41,7 @@ module ibex_pmp #(
logic [PMPNumChan-1:0][PMPNumRegions-1:0] region_match_all; logic [PMPNumChan-1:0][PMPNumRegions-1:0] region_match_all;
logic [PMPNumChan-1:0][PMPNumRegions-1:0] region_basic_perm_check; logic [PMPNumChan-1:0][PMPNumRegions-1:0] region_basic_perm_check;
logic [PMPNumChan-1:0][PMPNumRegions-1:0] region_perm_check; logic [PMPNumChan-1:0][PMPNumRegions-1:0] region_perm_check;
logic [PMPNumChan-1:0] access_fault_check_res;
logic [PMPNumChan-1:0] debug_mode_allowed_access; logic [PMPNumChan-1:0] debug_mode_allowed_access;
/////////////////////// ///////////////////////
@ -241,14 +242,14 @@ module ibex_pmp #(
// Once the permission checks of the regions are done, decide if the access is // Once the permission checks of the regions are done, decide if the access is
// denied by figuring out the matching region and its permission check. // denied by figuring out the matching region and its permission check.
// No error is raised if the access is allowed as Debug Module access (first term). assign access_fault_check_res[c] = access_fault_check(csr_pmp_mseccfg_i.mmwp,
assign pmp_req_err_o[c] = ~debug_mode_allowed_access[c] &
access_fault_check(csr_pmp_mseccfg_i.mmwp,
csr_pmp_mseccfg_i.mml, csr_pmp_mseccfg_i.mml,
pmp_req_type_i[c], pmp_req_type_i[c],
region_match_all[c], region_match_all[c],
priv_mode_i[c], priv_mode_i[c],
region_perm_check[c]); region_perm_check[c]);
// Debug Module accesses in Debug Mode are always allowed.
assign pmp_req_err_o[c] = ~debug_mode_allowed_access[c] & access_fault_check_res[c];
// Access fails check against one region but access allowed due to another higher-priority // Access fails check against one region but access allowed due to another higher-priority
// region. // region.