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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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//
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// CVS Revision History
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// CVS Revision History
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//
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//
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// $Log: not supported by cvs2svn $
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// $Log: not supported by cvs2svn $
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// Revision 1.8 2002/08/14 06:23:50 lampret
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// Disabled ITLB translation when 1) doing access to ITLB SPRs or 2) crossing page. This modification was tested only with parts of IMMU test - remaining test cases needs to be run.
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//
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// Revision 1.7 2002/08/12 05:31:30 lampret
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// Revision 1.7 2002/08/12 05:31:30 lampret
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// Delayed external access at page crossing.
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// Delayed external access at page crossing.
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//
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//
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// Revision 1.6 2002/03/29 15:16:56 lampret
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// Revision 1.6 2002/03/29 15:16:56 lampret
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// Some of the warnings fixed.
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// Some of the warnings fixed.
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Line 261... |
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//
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//
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// icpu_rty_o
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// icpu_rty_o
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//
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//
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// assign icpu_rty_o = !icpu_err_o & icimmu_rty_i;
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// assign icpu_rty_o = !icpu_err_o & icimmu_rty_i;
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assign icpu_rty_o = icimmu_rty_i | itlb_spr_access;
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assign icpu_rty_o = icimmu_rty_i | itlb_spr_access & immu_en;
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//
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//
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// icpu_err_o
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// icpu_err_o
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//
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//
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assign icpu_err_o = miss | fault | icimmu_err_i;
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assign icpu_err_o = miss | fault | icimmu_err_i;
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Line 287... |
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//
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//
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// Cut transfer if something goes wrong with translation. If IC is disabled,
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// Cut transfer if something goes wrong with translation. If IC is disabled,
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// use delayed signals.
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// use delayed signals.
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//
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//
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assign icimmu_cycstb_o = (!ic_en & immu_en) ? ~(miss | fault) & icpu_cycstb_i & ~page_cross : (miss | fault) ? 1'b0 : icpu_cycstb_i & ~page_cross;
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// assign icimmu_cycstb_o = (!ic_en & immu_en) ? ~(miss | fault) & icpu_cycstb_i & ~page_cross : (miss | fault) ? 1'b0 : icpu_cycstb_i & ~page_cross; // DL
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assign icimmu_cycstb_o = immu_en ? ~(miss | fault) & icpu_cycstb_i & ~page_cross & itlb_done : icpu_cycstb_i & ~page_cross;
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//
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//
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// Cache Inhibit
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// Cache Inhibit
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//
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//
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assign icimmu_ci_o = immu_en ? itlb_done & itlb_ci : `OR1200_IMMU_CI;
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assign icimmu_ci_o = immu_en ? itlb_done & itlb_ci : `OR1200_IMMU_CI;
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Line 316... |
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//
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//
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// Physical address is either translated virtual address or
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// Physical address is either translated virtual address or
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// simply equal when IMMU is disabled
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// simply equal when IMMU is disabled
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//
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//
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assign icimmu_adr_o = immu_en ? {itlb_ppn, icpu_adr_i[`OR1200_IMMU_PS-1:0]} : {icpu_vpn_r, icpu_adr_i[`OR1200_IMMU_PS-1:0]};
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assign icimmu_adr_o = itlb_done ? {itlb_ppn, icpu_adr_i[`OR1200_IMMU_PS-1:0]} : {icpu_vpn_r, icpu_adr_i[`OR1200_IMMU_PS-1:0]}; // DL: immu_en
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//
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//
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// Output to SPRS unit
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// Output to SPRS unit
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//
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//
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assign spr_dat_o = spr_cs ? itlb_dat_o : 32'h00000000;
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assign spr_dat_o = spr_cs ? itlb_dat_o : 32'h00000000;
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