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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// OR1200's Programmable Interrupt Controller ////
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//// OR1200's Programmable Interrupt Controller ////
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//// ////
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//// ////
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//// This file is part of the OpenRISC 1200 project ////
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//// This file is part of the OpenRISC 1200 project ////
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//// http://www.opencores.org/cores/or1k/ ////
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//// http://www.opencores.org/project,or1k ////
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//// ////
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//// ////
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//// Description ////
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//// Description ////
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//// PIC according to OR1K architectural specification. ////
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//// PIC according to OR1K architectural specification. ////
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//// ////
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//// ////
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//// To Do: ////
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//// To Do: ////
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//// Public License along with this source; if not, download it ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//// ////
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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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//
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// $Log: or1200_pic.v,v $
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// $Log: or1200_pic.v,v $
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// Revision 2.0 2010/06/30 11:00:00 ORSoC
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// Revision 2.0 2010/06/30 11:00:00 ORSoC
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// No update
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//
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// Revision 1.4 2004/06/08 18:17:36 lampret
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// Non-functional changes. Coding style fixes.
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//
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// Revision 1.3 2002/03/29 15:16:56 lampret
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// Some of the warnings fixed.
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//
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// Revision 1.2 2002/01/18 07:56:00 lampret
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// No more low/high priority interrupts (PICPR removed). Added tick timer exception. Added exception prefix (SR[EPH]). Fixed single-step bug whenreading NPC.
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//
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// Revision 1.1 2002/01/03 08:16:15 lampret
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// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
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//
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// Revision 1.8 2001/10/21 17:57:16 lampret
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// Removed params from generic_XX.v. Added translate_off/on in sprs.v and id.v. Removed spr_addr from dc.v and ic.v. Fixed CR+LF.
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//
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// Revision 1.7 2001/10/14 13:12:10 lampret
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// MP3 version.
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//
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// Revision 1.1.1.1 2001/10/06 10:18:36 igorm
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// no message
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//
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// Revision 1.2 2001/08/09 13:39:33 lampret
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// Major clean-up.
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//
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// Revision 1.1 2001/07/20 00:46:21 lampret
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// Development version of RTL. Libraries are missing.
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//
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//
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//
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// synopsys translate_off
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// synopsys translate_off
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`include "timescale.v"
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`include "timescale.v"
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// synopsys translate_on
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// synopsys translate_on
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`ifdef OR1200_PIC_PICMR
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`ifdef OR1200_PIC_PICMR
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always @(posedge clk or posedge rst)
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always @(posedge clk or posedge rst)
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if (rst)
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if (rst)
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picmr <= {1'b1, {`OR1200_PIC_INTS-3{1'b0}}};
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picmr <= {1'b1, {`OR1200_PIC_INTS-3{1'b0}}};
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else if (picmr_sel && spr_write) begin
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else if (picmr_sel && spr_write) begin
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picmr <= #1 spr_dat_i[`OR1200_PIC_INTS-1:2];
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picmr <= spr_dat_i[`OR1200_PIC_INTS-1:2];
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end
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end
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`else
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`else
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assign picmr = (`OR1200_PIC_INTS)'b1;
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assign picmr = (`OR1200_PIC_INTS)'b1;
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`endif
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`endif
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`ifdef OR1200_PIC_PICSR
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`ifdef OR1200_PIC_PICSR
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always @(posedge clk or posedge rst)
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always @(posedge clk or posedge rst)
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if (rst)
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if (rst)
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picsr <= {`OR1200_PIC_INTS{1'b0}};
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picsr <= {`OR1200_PIC_INTS{1'b0}};
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else if (picsr_sel && spr_write) begin
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else if (picsr_sel && spr_write) begin
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picsr <= #1 spr_dat_i[`OR1200_PIC_INTS-1:0] | um_ints;
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picsr <= spr_dat_i[`OR1200_PIC_INTS-1:0] | um_ints;
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end else
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end else
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picsr <= #1 picsr | um_ints;
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picsr <= picsr | um_ints;
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`else
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`else
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assign picsr = pic_int;
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assign picsr = pic_int;
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`endif
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`endif
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//
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//
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//
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//
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always @(spr_addr or picmr or picsr)
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always @(spr_addr or picmr or picsr)
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case (spr_addr[`OR1200_PICOFS_BITS]) // synopsys parallel_case
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case (spr_addr[`OR1200_PICOFS_BITS]) // synopsys parallel_case
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`ifdef OR1200_PIC_READREGS
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`ifdef OR1200_PIC_READREGS
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`OR1200_PIC_OFS_PICMR: begin
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`OR1200_PIC_OFS_PICMR: begin
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spr_dat_o[`OR1200_PIC_INTS-1:0] = {picmr, 2'b0};
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spr_dat_o[`OR1200_PIC_INTS-1:0] = {picmr, 2'b11};
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`ifdef OR1200_PIC_UNUSED_ZERO
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`ifdef OR1200_PIC_UNUSED_ZERO
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spr_dat_o[31:`OR1200_PIC_INTS] = {32-`OR1200_PIC_INTS{1'b0}};
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spr_dat_o[31:`OR1200_PIC_INTS] = {32-`OR1200_PIC_INTS{1'b0}};
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`endif
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`endif
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end
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end
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`endif
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`endif
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