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Line 147... |
-- Address decoding for MIPS-I-like system as implemented in target hardware
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-- Address decoding for MIPS-I-like system as implemented in target hardware
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function decode_addr_mips1(addr : t_addr_decode) return t_range_attr is
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function decode_addr_mips1(addr : t_addr_decode) return t_range_attr is
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begin
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begin
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case addr(31 downto 27) is
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case addr(31 downto 27) is
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when "00000" => return (MT_SRAM_16B ,'1','1',"001"); -- useg
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when "00000" => return (MT_SRAM_16B ,'1','1',"010"); -- useg
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when "10000" => return (MT_SRAM_16B ,'1','1',"000"); -- kseg0
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when "10000" => return (MT_SRAM_16B ,'1','1',"010"); -- kseg0
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--when "10100" => return (MT_IO_SYNC ,'1','0',"000"); -- kseg1 i/o
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--when "10100" => return (MT_IO_SYNC ,'1','0',"000"); -- kseg1 i/o
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when "00100" => return (MT_IO_SYNC ,'1','0',"000"); -- kseg1 i/o
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when "00100" => return (MT_IO_SYNC ,'1','0',"000"); -- kseg1 i/o
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when "10110" => return (MT_SRAM_8B ,'0','0',"011"); -- kseg1 flash
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when "10110" => return (MT_SRAM_8B ,'0','0',"111"); -- kseg1 flash
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when "10111" => return (MT_BRAM ,'0','0',"000"); -- kseg1 boot rom
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when "10111" => return (MT_BRAM ,'0','0',"000"); -- kseg1 boot rom
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when others => return (MT_UNMAPPED ,'0','0',"000"); -- stray
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when others => return (MT_UNMAPPED ,'0','0',"000"); -- stray
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end case;
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end case;
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end function decode_addr_mips1;
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end function decode_addr_mips1;
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