URL https://opencores.org/ocsvn/or1200_soc/or1200_soc/trunk

Subversion Repositories or1200_soc

[/] [or1200_soc/] [trunk/] [src/] [soc_boot.v] - Blame information for rev 22

Details | Compare with Previous | View Log


// --------------------------------------------------------------------
//
// --------------------------------------------------------------------
 
 
module soc_boot
  (
    input   [31:0]  mem_data_i,
    output  [31:0]  mem_data_o,
    input   [31:0]  mem_addr_i,
    input   [3:0]   mem_sel_i,
    input           mem_we_i,
    input           mem_cyc_i,
    input           mem_stb_i,
    output          mem_ack_o,
    output          mem_err_o,
    output          mem_rty_o,
 
    input       [1:0]   boot_select,
 
    input           mem_clk_i,
    input           mem_rst_i
  );
 
        parameter USE_BOOT_ROM_0            = 1;
//      parameter BOOT_ROM_0_FILE       = "../../../../../sw/load_this_to_ram/boot_rom_0.txt";
        parameter BOOT_ROM_0_DEPTH        = 8;
 
        parameter USE_BOOT_ROM_1            = 0;
//      parameter BOOT_ROM_1_FILE       = "../../../../../sw/load_this_to_ram/boot_rom_1.txt";
//      parameter BOOT_ROM_1_DEPTH      = 15;
        parameter BOOT_ROM_1_DEPTH        = 0;
 
        parameter USE_BOOT_ROM_2            = 0;
        parameter BOOT_ROM_2_FILE         = 0;
        parameter BOOT_ROM_2_DEPTH        = 0;
 
  //---------------------------------------------------
  // slave muxes
  reg  [1:0]   slave_select;
 
  always @(*)
    casez( {mem_addr_i[27:26], boot_select} )
      4'b00_00: slave_select = 2'b00;
      4'b00_01: slave_select = 2'b01;
      4'b00_10: slave_select = 2'b10;
      4'b00_11: slave_select = 2'b11;
      4'b01_??: slave_select = 2'b01;
      4'b10_??: slave_select = 2'b10;
      4'b11_??: slave_select = 2'b11;
    endcase
 
  // data_o mux
  wire  [31:0]  slave_0_data_o, slave_1_data_o, slave_2_data_o, slave_3_data_o;
  reg   [31:0]  slave_mux_data_o;
 
  assign mem_data_o = slave_mux_data_o;
 
  always @(*)
    case( slave_select )
      2'b00: slave_mux_data_o = slave_0_data_o;
      2'b01: slave_mux_data_o = slave_1_data_o;
      2'b10: slave_mux_data_o = slave_2_data_o;
      2'b11: slave_mux_data_o = slave_3_data_o;
    endcase
 
  assign mem_ack_o        = mem_cyc_i & mem_stb_i;
  assign mem_err_o                              = 1'b0;
  assign mem_rty_o                              = 1'b0;
 
 
  //---------------------------------------------------
  // boot_vector_rom
  wire slave_0_we_i = mem_we_i & (slave_select == 2'b00);
 
  boot_vector_rom #(    .DATA_WIDTH(32), .ADDR_WIDTH(2) )
    i_boot_vector_rom           (
                                    .data(mem_data_i),
                                    .addr( mem_addr_i[3:2] ),
                                    .we(slave_0_we_i),
                                    .clk(~mem_clk_i),
                                    .q(slave_0_data_o)
                                  );
 
  //---------------------------------------------------
  // boot_rom_0
  wire slave_1_we_i = mem_we_i & (slave_select == 2'b01);
 
        generate
                if( USE_BOOT_ROM_0 )
                  boot_rom_0 #(         .DATA_WIDTH(32), .ADDR_WIDTH(BOOT_ROM_0_DEPTH) )
                    i_boot_rom_0                                (
                                                    .data(mem_data_i),
                                                    .addr( mem_addr_i[(BOOT_ROM_0_DEPTH + 1):2] ),
                                                    .we(slave_1_we_i),
                                                    .clk(~mem_clk_i),
                                                    .q(slave_1_data_o)
                                                  );
                else
                        assign slave_1_data_o = 32'h1bad_c0de;
        endgenerate
 
  //---------------------------------------------------
  // boot_rom_1
  wire slave_2_we_i = mem_we_i & (slave_select == 2'b10);
 
        generate
                if( USE_BOOT_ROM_1 )
                  boot_rom_1 #(         .DATA_WIDTH(32), .ADDR_WIDTH(BOOT_ROM_1_DEPTH) )
                  i_boot_rom_1                          (
                                                    .data(mem_data_i),
                                                    .addr( mem_addr_i[(BOOT_ROM_1_DEPTH + 1):2] ),
                                                    .we(slave_2_we_i),
                                                    .clk(~mem_clk_i),
                                                    .q(slave_2_data_o)
                                                  );
                else
                        assign slave_2_data_o = 32'h1bad_c0de;
        endgenerate
 
  //---------------------------------------------------
  // boot_rom_2
  wire slave_3_we_i = mem_we_i & (slave_select == 2'b11);
 
        generate
                if( USE_BOOT_ROM_2 )
                  boot_rom_2 #(         .DATA_WIDTH(32), .ADDR_WIDTH(BOOT_ROM_2_DEPTH) )
                  i_boot_rom_2                          (
                                                    .data(mem_data_i),
                                                    .addr( mem_addr_i[(BOOT_ROM_2_DEPTH + 1):2] ),
                                                    .we(slave_3_we_i),
                                                    .clk(~mem_clk_i),
                                                    .q(slave_3_data_o)
                                                  );
                else
                        assign slave_3_data_o = 32'h1bad_c0de;
        endgenerate
 
endmodule
 

Line No.	Rev	Author	Line
1	22	qaztronic	`// --------------------------------------------------------------------`
2			`//`
3			`// --------------------------------------------------------------------`
4
5
6			`module soc_boot`
7			`(`
8			`input [31:0] mem_data_i,`
9			`output [31:0] mem_data_o,`
10			`input [31:0] mem_addr_i,`
11			`input [3:0] mem_sel_i,`
12			`input mem_we_i,`
13			`input mem_cyc_i,`
14			`input mem_stb_i,`
15			`output mem_ack_o,`
16			`output mem_err_o,`
17			`output mem_rty_o,`
18
19			`input [1:0] boot_select,`
20
21			`input mem_clk_i,`
22			`input mem_rst_i`
23			`);`
24
25			`parameter USE_BOOT_ROM_0 = 1;`
26			`// parameter BOOT_ROM_0_FILE = "../../../../../sw/load_this_to_ram/boot_rom_0.txt";`
27			`parameter BOOT_ROM_0_DEPTH = 8;`
28
29			`parameter USE_BOOT_ROM_1 = 0;`
30			`// parameter BOOT_ROM_1_FILE = "../../../../../sw/load_this_to_ram/boot_rom_1.txt";`
31			`// parameter BOOT_ROM_1_DEPTH = 15;`
32			`parameter BOOT_ROM_1_DEPTH = 0;`
33
34			`parameter USE_BOOT_ROM_2 = 0;`
35			`parameter BOOT_ROM_2_FILE = 0;`
36			`parameter BOOT_ROM_2_DEPTH = 0;`
37
38			`//---------------------------------------------------`
39			`// slave muxes`
40			`reg [1:0] slave_select;`
41
42			`always @(*)`
43			`casez( {mem_addr_i[27:26], boot_select} )`
44			`4'b00_00: slave_select = 2'b00;`
45			`4'b00_01: slave_select = 2'b01;`
46			`4'b00_10: slave_select = 2'b10;`
47			`4'b00_11: slave_select = 2'b11;`
48			`4'b01_??: slave_select = 2'b01;`
49			`4'b10_??: slave_select = 2'b10;`
50			`4'b11_??: slave_select = 2'b11;`
51			`endcase`
52
53			`// data_o mux`
54			`wire [31:0] slave_0_data_o, slave_1_data_o, slave_2_data_o, slave_3_data_o;`
55			`reg [31:0] slave_mux_data_o;`
56
57			`assign mem_data_o = slave_mux_data_o;`
58
59			`always @(*)`
60			`case( slave_select )`
61			`2'b00: slave_mux_data_o = slave_0_data_o;`
62			`2'b01: slave_mux_data_o = slave_1_data_o;`
63			`2'b10: slave_mux_data_o = slave_2_data_o;`
64			`2'b11: slave_mux_data_o = slave_3_data_o;`
65			`endcase`
66
67			`assign mem_ack_o = mem_cyc_i & mem_stb_i;`
68			`assign mem_err_o = 1'b0;`
69			`assign mem_rty_o = 1'b0;`
70
71
72			`//---------------------------------------------------`
73			`// boot_vector_rom`
74			`wire slave_0_we_i = mem_we_i & (slave_select == 2'b00);`
75
76			`boot_vector_rom #( .DATA_WIDTH(32), .ADDR_WIDTH(2) )`
77			`i_boot_vector_rom (`
78			`.data(mem_data_i),`
79			`.addr( mem_addr_i[3:2] ),`
80			`.we(slave_0_we_i),`
81			`.clk(~mem_clk_i),`
82			`.q(slave_0_data_o)`
83			`);`
84
85			`//---------------------------------------------------`
86			`// boot_rom_0`
87			`wire slave_1_we_i = mem_we_i & (slave_select == 2'b01);`
88
89			`generate`
90			`if( USE_BOOT_ROM_0 )`
91			`boot_rom_0 #( .DATA_WIDTH(32), .ADDR_WIDTH(BOOT_ROM_0_DEPTH) )`
92			`i_boot_rom_0 (`
93			`.data(mem_data_i),`
94			`.addr( mem_addr_i[(BOOT_ROM_0_DEPTH + 1):2] ),`
95			`.we(slave_1_we_i),`
96			`.clk(~mem_clk_i),`
97			`.q(slave_1_data_o)`
98			`);`
99			`else`
100			`assign slave_1_data_o = 32'h1bad_c0de;`
101			`endgenerate`
102
103			`//---------------------------------------------------`
104			`// boot_rom_1`
105			`wire slave_2_we_i = mem_we_i & (slave_select == 2'b10);`
106
107			`generate`
108			`if( USE_BOOT_ROM_1 )`
109			`boot_rom_1 #( .DATA_WIDTH(32), .ADDR_WIDTH(BOOT_ROM_1_DEPTH) )`
110			`i_boot_rom_1 (`
111			`.data(mem_data_i),`
112			`.addr( mem_addr_i[(BOOT_ROM_1_DEPTH + 1):2] ),`
113			`.we(slave_2_we_i),`
114			`.clk(~mem_clk_i),`
115			`.q(slave_2_data_o)`
116			`);`
117			`else`
118			`assign slave_2_data_o = 32'h1bad_c0de;`
119			`endgenerate`
120
121			`//---------------------------------------------------`
122			`// boot_rom_2`
123			`wire slave_3_we_i = mem_we_i & (slave_select == 2'b11);`
124
125			`generate`
126			`if( USE_BOOT_ROM_2 )`
127			`boot_rom_2 #( .DATA_WIDTH(32), .ADDR_WIDTH(BOOT_ROM_2_DEPTH) )`
128			`i_boot_rom_2 (`
129			`.data(mem_data_i),`
130			`.addr( mem_addr_i[(BOOT_ROM_2_DEPTH + 1):2] ),`
131			`.we(slave_3_we_i),`
132			`.clk(~mem_clk_i),`
133			`.q(slave_3_data_o)`
134			`);`
135			`else`
136			`assign slave_3_data_o = 32'h1bad_c0de;`
137			`endgenerate`
138
139			`endmodule`
140

Browse

Tools

Subversion Repositories or1200_soc

[/] [or1200_soc/] [trunk/] [src/] [soc_boot.v] - Blame information for rev 22