| Line 107... |
Line 107... |
input spr_pc_we;
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input spr_pc_we;
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input genpc_refetch;
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input genpc_refetch;
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input genpc_freeze;
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input genpc_freeze;
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input no_more_dslot;
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input no_more_dslot;
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parameter boot_adr = `OR1200_BOOT_ADR;
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//
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//
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// Internal wires and regs
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// Internal wires and regs
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//
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//
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reg [31:2] pcreg_default;
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reg [31:2] pcreg_default;
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wire [31:0] pcreg_boot;
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reg pcreg_select;
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reg pcreg_select;
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reg [31:2] pcreg;
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reg [31:2] pcreg;
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reg [31:0] pc;
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reg [31:0] pc;
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// Set in event of jump or taken branch
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// Set in event of jump or taken branch
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reg ex_branch_taken;
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reg ex_branch_taken;
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| Line 256... |
Line 256... |
// PC register
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// PC register
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//
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//
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always @(posedge clk or `OR1200_RST_EVENT rst)
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always @(posedge clk or `OR1200_RST_EVENT rst)
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// default value
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// default value
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if (rst == `OR1200_RST_VALUE) begin
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if (rst == `OR1200_RST_VALUE) begin
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pcreg_default <= `OR1200_BOOT_PCREG_DEFAULT; // jb
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pcreg_default <= (boot_adr >>2) - 4;
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pcreg_select <= 1'b1;// select async. value due to reset state
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pcreg_select <= 1'b1;// select async. value due to reset state
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end
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end
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// selected value (different from default) is written into FF after
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// selected value (different from default) is written into FF after
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// reset state
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// reset state
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else if (pcreg_select) begin
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else if (pcreg_select) begin
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| Line 276... |
Line 276... |
pcreg_default <= pc[31:2];
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pcreg_default <= pc[31:2];
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end
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end
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// select async. value for pcreg after reset - PC jumps to the address selected
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// select async. value for pcreg after reset - PC jumps to the address selected
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// after boot.
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// after boot.
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assign pcreg_boot = `OR1200_BOOT_ADR; // changed JB
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wire [31:0] pcreg_boot = boot_adr;
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always @(pcreg_boot or pcreg_default or pcreg_select)
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always @(pcreg_boot or pcreg_default or pcreg_select)
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if (pcreg_select)
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if (pcreg_select)
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// async. value is selected due to reset state
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// async. value is selected due to reset state
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pcreg = pcreg_boot[31:2];
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pcreg = pcreg_boot[31:2];
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