From: Benjamin Herrenschmidt Date: Sat, 13 Jun 2020 12:04:45 +0000 (+1000) Subject: soc: Rename wb_dram_ctrl to wb_ext_io and rework decoding X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f9f18906a3039c9dc773c85adc2d9d144a83030c;p=microwatt.git soc: Rename wb_dram_ctrl to wb_ext_io and rework decoding This makes the control bus currently going out of "soc" towards litedram more generic for external IO devices added by the top-level rather than inside the SoC proper. This is mostly renaming of signals and a small change on how the address decoder operates, using a separate "cascaded" decode for the external IOs. We make the region 0xc8nn_nnnn be the "external IO" region for now. This will make it easier / cleaner to add more external devices. Signed-off-by: Benjamin Herrenschmidt --- diff --git a/core_dram_tb.vhdl b/core_dram_tb.vhdl index 8d34306..d0890cb 100644 --- a/core_dram_tb.vhdl +++ b/core_dram_tb.vhdl @@ -26,10 +26,10 @@ architecture behave of core_dram_tb is -- Sim DRAM signal wb_dram_in : wishbone_master_out; signal wb_dram_out : wishbone_slave_out; - signal wb_dram_ctrl_in : wb_io_master_out; - signal wb_dram_ctrl_out : wb_io_slave_out; - signal wb_dram_is_csr : std_ulogic; - signal wb_dram_is_init : std_ulogic; + signal wb_ext_io_in : wb_io_master_out; + signal wb_ext_io_out : wb_io_slave_out; + signal wb_ext_is_dram_csr : std_ulogic; + signal wb_ext_is_dram_init : std_ulogic; signal core_alt_reset : std_ulogic; -- SPI @@ -74,10 +74,10 @@ begin system_clk => system_clk, wb_dram_in => wb_dram_in, wb_dram_out => wb_dram_out, - wb_dram_ctrl_in => wb_dram_ctrl_in, - wb_dram_ctrl_out => wb_dram_ctrl_out, - wb_dram_is_csr => wb_dram_is_csr, - wb_dram_is_init => wb_dram_is_init, + wb_ext_io_in => wb_ext_io_in, + wb_ext_io_out => wb_ext_io_out, + wb_ext_is_dram_csr => wb_ext_is_dram_csr, + wb_ext_is_dram_init => wb_ext_is_dram_init, spi_flash_sck => spi_sck, spi_flash_cs_n => spi_cs_n, spi_flash_sdat_o => spi_sdat_o, @@ -124,38 +124,18 @@ begin PAYLOAD_SIZE => ROM_SIZE ) port map( - clk_in => clk, + clk_in => clk, rst => rst, - system_clk => system_clk, - system_reset => soc_rst, - core_alt_reset => core_alt_reset, - pll_locked => open, - - wb_in => wb_dram_in, - wb_out => wb_dram_out, - wb_ctrl_in => wb_dram_ctrl_in, - wb_ctrl_out => wb_dram_ctrl_out, - wb_ctrl_is_csr => wb_dram_is_csr, - wb_ctrl_is_init => wb_dram_is_init, - - init_done => open, - init_error => open, - - ddram_a => open, - ddram_ba => open, - ddram_ras_n => open, - ddram_cas_n => open, - ddram_we_n => open, - ddram_cs_n => open, - ddram_dm => open, - ddram_dq => open, - ddram_dqs_p => open, - ddram_dqs_n => open, - ddram_clk_p => open, - ddram_clk_n => open, - ddram_cke => open, - ddram_odt => open, - ddram_reset_n => open + system_clk => system_clk, + system_reset => soc_rst, + core_alt_reset => core_alt_reset, + + wb_in => wb_dram_in, + wb_out => wb_dram_out, + wb_ctrl_in => wb_ext_io_in, + wb_ctrl_out => wb_ext_io_out, + wb_ctrl_is_csr => wb_ext_is_dram_csr, + wb_ctrl_is_init => wb_ext_is_dram_init ); clk_process: process diff --git a/fpga/top-arty.vhdl b/fpga/top-arty.vhdl index 59181e0..d22212a 100644 --- a/fpga/top-arty.vhdl +++ b/fpga/top-arty.vhdl @@ -77,10 +77,12 @@ architecture behaviour of toplevel is signal wb_dram_out : wishbone_slave_out; -- DRAM control wishbone connection - signal wb_dram_ctrl_in : wb_io_master_out; - signal wb_dram_ctrl_out : wb_io_slave_out; - signal wb_dram_is_csr : std_ulogic; - signal wb_dram_is_init : std_ulogic; + signal wb_ext_io_in : wb_io_master_out; + signal wb_ext_io_out : wb_io_slave_out; + signal wb_ext_is_dram_csr : std_ulogic; + signal wb_ext_is_dram_init : std_ulogic; + signal wb_ext_is_eth : std_ulogic; + -- Control/status signal core_alt_reset : std_ulogic; @@ -157,13 +159,13 @@ begin spi_flash_sdat_i => spi_sdat_i, -- DRAM wishbone - wb_dram_in => wb_dram_in, - wb_dram_out => wb_dram_out, - wb_dram_ctrl_in => wb_dram_ctrl_in, - wb_dram_ctrl_out => wb_dram_ctrl_out, - wb_dram_is_csr => wb_dram_is_csr, - wb_dram_is_init => wb_dram_is_init, - alt_reset => core_alt_reset + wb_dram_in => wb_dram_in, + wb_dram_out => wb_dram_out, + wb_ext_io_in => wb_ext_io_in, + wb_ext_io_out => wb_ext_io_out, + wb_ext_is_dram_csr => wb_ext_is_dram_csr, + wb_ext_is_dram_init => wb_ext_is_dram_init, + alt_reset => core_alt_reset ); -- SPI Flash @@ -291,10 +293,10 @@ begin wb_in => wb_dram_in, wb_out => wb_dram_out, - wb_ctrl_in => wb_dram_ctrl_in, - wb_ctrl_out => wb_dram_ctrl_out, - wb_ctrl_is_csr => wb_dram_is_csr, - wb_ctrl_is_init => wb_dram_is_init, + wb_ctrl_in => wb_ext_io_in, + wb_ctrl_out => wb_ext_io_out, + wb_ctrl_is_csr => wb_ext_is_dram_csr, + wb_ctrl_is_init => wb_ext_is_dram_init, init_done => dram_init_done, init_error => dram_init_error, diff --git a/fpga/top-nexys-video.vhdl b/fpga/top-nexys-video.vhdl index 3ba22b2..67266af 100644 --- a/fpga/top-nexys-video.vhdl +++ b/fpga/top-nexys-video.vhdl @@ -73,10 +73,10 @@ architecture behaviour of toplevel is signal wb_dram_out : wishbone_slave_out; -- DRAM control wishbone connection - signal wb_dram_ctrl_in : wb_io_master_out; - signal wb_dram_ctrl_out : wb_io_slave_out; - signal wb_dram_is_csr : std_ulogic; - signal wb_dram_is_init : std_ulogic; + signal wb_ext_io_in : wb_io_master_out; + signal wb_ext_io_out : wb_io_slave_out; + signal wb_ext_is_dram_csr : std_ulogic; + signal wb_ext_is_dram_init : std_ulogic; -- Control/status signal core_alt_reset : std_ulogic; @@ -145,13 +145,13 @@ begin spi_flash_sdat_i => spi_sdat_i, -- DRAM wishbone - wb_dram_in => wb_dram_in, - wb_dram_out => wb_dram_out, - wb_dram_ctrl_in => wb_dram_ctrl_in, - wb_dram_ctrl_out => wb_dram_ctrl_out, - wb_dram_is_csr => wb_dram_is_csr, - wb_dram_is_init => wb_dram_is_init, - alt_reset => core_alt_reset + wb_dram_in => wb_dram_in, + wb_dram_out => wb_dram_out, + wb_ext_io_in => wb_ext_io_in, + wb_ext_io_out => wb_ext_io_out, + wb_ext_is_dram_csr => wb_dram_is_csr, + wb_ext_is_dram_init => wb_dram_is_init, + alt_reset => core_alt_reset ); -- SPI Flash. The SPI clk needs to be fed through the STARTUPE2 @@ -266,10 +266,10 @@ begin wb_in => wb_dram_in, wb_out => wb_dram_out, - wb_ctrl_in => wb_dram_ctrl_in, - wb_ctrl_out => wb_dram_ctrl_out, - wb_ctrl_is_csr => wb_dram_is_csr, - wb_ctrl_is_init => wb_dram_is_init, + wb_ctrl_in => wb_ext_io_in, + wb_ctrl_out => wb_ext_io_out, + wb_ctrl_is_csr => wb_ext_is_dram_csr, + wb_ctrl_is_init => wb_ext_is_dram_init, init_done => dram_init_done, init_error => dram_init_error, diff --git a/include/microwatt_soc.h b/include/microwatt_soc.h index 9cfa7b5..e0042fb 100644 --- a/include/microwatt_soc.h +++ b/include/microwatt_soc.h @@ -13,7 +13,7 @@ #define UART_BASE 0xc0002000 /* UART */ #define XICS_BASE 0xc0004000 /* Interrupt controller */ #define SPI_FCTRL_BASE 0xc0006000 /* SPI flash controller registers */ -#define DRAM_CTRL_BASE 0xc0100000 /* LiteDRAM control registers */ +#define DRAM_CTRL_BASE 0xc8000000 /* LiteDRAM control registers */ #define SPI_FLASH_BASE 0xf0000000 /* SPI Flash memory map */ #define DRAM_INIT_BASE 0xff000000 /* Internal DRAM init firmware */ diff --git a/litedram/generated/arty/litedram_core.init b/litedram/generated/arty/litedram_core.init index e70ac2f..84033c5 100644 --- a/litedram/generated/arty/litedram_core.init +++ b/litedram/generated/arty/litedram_core.init @@ -724,9 +724,9 @@ a12100a660000000 4bfff9a938637cb0 000000004bfffd78 0000088003000000 -612908043d20c010 +612908043d20c800 7c0004ac79290020 -3d40c0107c604f2a +3d40c8007c604f2a 614a080839200001 7c0004ac794a0020 4e8000207d20572a @@ -736,29 +736,29 @@ a12100a660000000 600000007d2903a6 4e8000204200fffc 0000000000000000 -3d20c01000000000 +3d20c80000000000 6129001439400001 792900207d431830 7c604f2a7c0004ac -610800183d00c010 +610800183d00c800 7c0004ac79080020 394000007d40472a 7d404f2a7c0004ac 000000004e800020 0000000000000000 -394000013d20c010 +394000013d20c800 7d43183061290014 7c0004ac79290020 -3d00c0107c604f2a +3d00c8007c604f2a 790800206108001c 7d40472a7c0004ac 7c0004ac39400000 4e8000207d404f2a 0000000000000000 -3d40c01000000000 +3d40c80000000000 614a083439200025 7c0004ac794a0020 -3d40c0107d20572a +3d40c8007d20572a 614a083839200001 7c0004ac794a0020 4e8000207d20572a @@ -796,38 +796,38 @@ a12100a660000000 38c600017ce831ae 394affff4200ffe0 794a002139080004 -3d20c0104082ffc4 +3d20c8004082ffc4 6129080c3be00000 7c0004ac79290020 -3d20c0107fe04f2a +3d20c8007fe04f2a 7929002061290810 7fe04f2a7c0004ac 4bfffd8d38600009 4bfffdc13860000f -7fa4eb783c60c010 +7fa4eb783c60c800 7863002060630814 -3c60c0104bfffead +3c60c8004bfffead 6063082c38810064 4bfffe9978630020 -388100683c60c010 +388100683c60c800 7863002060630844 -3c60c0104bfffe85 +3c60c8004bfffe85 6063085c3881006c 4bfffe7178630020 -612908543d20c010 +612908543d20c800 7c0004ac79290020 -3d20c0107fe04f2a +3d20c8007fe04f2a 7929002061290858 7fe04f2a7c0004ac -392000173d40c010 +392000173d40c800 794a0020614a084c 7d20572a7c0004ac -392000013d40c010 +392000013d40c800 794a0020614a0850 7d20572a7c0004ac -6129083c3d20c010 +6129083c3d20c800 7c0004ac79290020 -3d20c0107fe04f2a +3d20c8007fe04f2a 7929002061290840 7fe04f2a7c0004ac 22de00017fc3f378 @@ -880,10 +880,10 @@ a12100a660000000 600000004bfff4cd 3be000007fc3f378 7f9fe8004bfffb8d -3d40c010419c0070 +3d40c800419c0070 614a080c39200000 7c0004ac794a0020 -3d40c0107d20572a +3d40c8007d20572a 794a0020614a0810 7d20572a7c0004ac 4bfffaed3860000b @@ -899,7 +899,7 @@ a12100a660000000 000000004bffff7c 00000b8001000000 384299e03c4c0001 -3d40c0107c0802a6 +3d40c8007c0802a6 3920000e614a0800 f8010010794a0020 7c0004acf821ffa1 @@ -910,7 +910,7 @@ f8010010794a0020 000000004e800020 0000008001000000 384299883c4c0001 -3d40c0107c0802a6 +3d40c8007c0802a6 39200001614a0800 f8010010794a0020 7c0004acf821ffa1 @@ -1016,11 +1016,11 @@ f92a0000794a1f24 3c4c000100000380 7c0802a638429644 f821fec1480010f5 -3bc000013fe0c010 +3bc000013fe0c800 7bff002063ff0014 386000004bfffc49 7c0004ac4bfff72d -3f80c0107fc0ff2a +3f80c8007fc0ff2a 7b9c0020639c0020 7fc0e72a7c0004ac 7c0004ac3ba00000 @@ -1040,7 +1040,7 @@ f92100983ae10063 39ef7fa83a107f28 3a527f6839ce7fb0 3b20000139210064 -3ea0c0103e80c010 +3ea0c8003e80c800 39210068f9210088 6294080c7f39f830 7b33002062b50810 @@ -1049,9 +1049,9 @@ f92100903bc00000 7ab500207a940020 7fbeeb7848000054 419e029c2f9d000f -612900143d20c010 +612900143d20c800 7c0004ac79290020 -3d00c0107e604f2a +3d00c8007e604f2a 6108002439400001 7c0004ac79080020 394000007d40472a @@ -1073,31 +1073,31 @@ f92100903bc00000 7c0004ac7f60a72a 386000097f60af2a 3860000f4bfff521 -3c60c0104bfff555 +3c60c8004bfff555 606308147f44d378 4bfff64178630020 -3c60c010e8810088 +3c60c800e8810088 786300206063082c e88100904bfff62d -606308443c60c010 +606308443c60c800 4bfff61978630020 -3881006c3c60c010 +3881006c3c60c800 786300206063085c -3d20c0104bfff605 +3d20c8004bfff605 7929002061290854 7f604f2a7c0004ac -612908583d20c010 +612908583d20c800 7c0004ac79290020 -3d40c0107f604f2a +3d40c8007f604f2a 614a084c39200017 7c0004ac794a0020 -3d40c0107d20572a +3d40c8007d20572a 614a085039200001 7c0004ac794a0020 -3d20c0107d20572a +3d20c8007d20572a 792900206129083c 7f604f2a7c0004ac -612908403d20c010 +612908403d20c800 7c0004ac79290020 e86100987f604f2a 7fe4fb787fa5eb78 @@ -1135,14 +1135,14 @@ f94100a0e8810080 7fc5f3783c62ffff 38637fb87fe4fb78 600000004bffecc5 -612900143d20c010 +612900143d20c800 7c0004ac79290020 -3d00c0107f204f2a +3d00c8007f204f2a 6108002039400001 7c0004ac79080020 394000007d40472a 7d404f2a7c0004ac -3d00c0107bde0020 +3d00c8007bde0020 6108002438de0001 394000017cc903a6 38e0000079080020 @@ -1162,19 +1162,19 @@ f94100a0e8810080 384291b83c4c0001 3c62ffff7c0802a6 48000c9138637f70 -3f60c010f821ff71 +3f60c800f821ff71 637b10003be00000 4bffebd17b7b0020 7c0004ac60000000 -3f40c0107fe0df2a +3f40c8007fe0df2a 7b5a0020635a1004 7fe0d72a7c0004ac -4bfff78d3fa0c010 +4bfff78d3fa0c800 7bbd002063bd080c 7fe0ef2a7c0004ac -63de08103fc0c010 +63de08103fc0c800 7c0004ac7bde0020 -3f80c0107fe0f72a +3f80c8007fe0f72a 639c08003920000c 7c0004ac7b9c0020 386000007d20e72a @@ -1699,10 +1699,10 @@ e8010010ebc1fff0 000000000000002d 30252d2b64323025 0000000000006432 -00000000c0100818 -00000000c0100830 -00000000c0100848 -00000000c0100860 +00000000c8000818 +00000000c8000830 +00000000c8000848 +00000000c8000860 6f6e204d41524453 207265646e752077 6572617764726168 diff --git a/litedram/generated/nexys-video/litedram_core.init b/litedram/generated/nexys-video/litedram_core.init index e70ac2f..84033c5 100644 --- a/litedram/generated/nexys-video/litedram_core.init +++ b/litedram/generated/nexys-video/litedram_core.init @@ -724,9 +724,9 @@ a12100a660000000 4bfff9a938637cb0 000000004bfffd78 0000088003000000 -612908043d20c010 +612908043d20c800 7c0004ac79290020 -3d40c0107c604f2a +3d40c8007c604f2a 614a080839200001 7c0004ac794a0020 4e8000207d20572a @@ -736,29 +736,29 @@ a12100a660000000 600000007d2903a6 4e8000204200fffc 0000000000000000 -3d20c01000000000 +3d20c80000000000 6129001439400001 792900207d431830 7c604f2a7c0004ac -610800183d00c010 +610800183d00c800 7c0004ac79080020 394000007d40472a 7d404f2a7c0004ac 000000004e800020 0000000000000000 -394000013d20c010 +394000013d20c800 7d43183061290014 7c0004ac79290020 -3d00c0107c604f2a +3d00c8007c604f2a 790800206108001c 7d40472a7c0004ac 7c0004ac39400000 4e8000207d404f2a 0000000000000000 -3d40c01000000000 +3d40c80000000000 614a083439200025 7c0004ac794a0020 -3d40c0107d20572a +3d40c8007d20572a 614a083839200001 7c0004ac794a0020 4e8000207d20572a @@ -796,38 +796,38 @@ a12100a660000000 38c600017ce831ae 394affff4200ffe0 794a002139080004 -3d20c0104082ffc4 +3d20c8004082ffc4 6129080c3be00000 7c0004ac79290020 -3d20c0107fe04f2a +3d20c8007fe04f2a 7929002061290810 7fe04f2a7c0004ac 4bfffd8d38600009 4bfffdc13860000f -7fa4eb783c60c010 +7fa4eb783c60c800 7863002060630814 -3c60c0104bfffead +3c60c8004bfffead 6063082c38810064 4bfffe9978630020 -388100683c60c010 +388100683c60c800 7863002060630844 -3c60c0104bfffe85 +3c60c8004bfffe85 6063085c3881006c 4bfffe7178630020 -612908543d20c010 +612908543d20c800 7c0004ac79290020 -3d20c0107fe04f2a +3d20c8007fe04f2a 7929002061290858 7fe04f2a7c0004ac -392000173d40c010 +392000173d40c800 794a0020614a084c 7d20572a7c0004ac -392000013d40c010 +392000013d40c800 794a0020614a0850 7d20572a7c0004ac -6129083c3d20c010 +6129083c3d20c800 7c0004ac79290020 -3d20c0107fe04f2a +3d20c8007fe04f2a 7929002061290840 7fe04f2a7c0004ac 22de00017fc3f378 @@ -880,10 +880,10 @@ a12100a660000000 600000004bfff4cd 3be000007fc3f378 7f9fe8004bfffb8d -3d40c010419c0070 +3d40c800419c0070 614a080c39200000 7c0004ac794a0020 -3d40c0107d20572a +3d40c8007d20572a 794a0020614a0810 7d20572a7c0004ac 4bfffaed3860000b @@ -899,7 +899,7 @@ a12100a660000000 000000004bffff7c 00000b8001000000 384299e03c4c0001 -3d40c0107c0802a6 +3d40c8007c0802a6 3920000e614a0800 f8010010794a0020 7c0004acf821ffa1 @@ -910,7 +910,7 @@ f8010010794a0020 000000004e800020 0000008001000000 384299883c4c0001 -3d40c0107c0802a6 +3d40c8007c0802a6 39200001614a0800 f8010010794a0020 7c0004acf821ffa1 @@ -1016,11 +1016,11 @@ f92a0000794a1f24 3c4c000100000380 7c0802a638429644 f821fec1480010f5 -3bc000013fe0c010 +3bc000013fe0c800 7bff002063ff0014 386000004bfffc49 7c0004ac4bfff72d -3f80c0107fc0ff2a +3f80c8007fc0ff2a 7b9c0020639c0020 7fc0e72a7c0004ac 7c0004ac3ba00000 @@ -1040,7 +1040,7 @@ f92100983ae10063 39ef7fa83a107f28 3a527f6839ce7fb0 3b20000139210064 -3ea0c0103e80c010 +3ea0c8003e80c800 39210068f9210088 6294080c7f39f830 7b33002062b50810 @@ -1049,9 +1049,9 @@ f92100903bc00000 7ab500207a940020 7fbeeb7848000054 419e029c2f9d000f -612900143d20c010 +612900143d20c800 7c0004ac79290020 -3d00c0107e604f2a +3d00c8007e604f2a 6108002439400001 7c0004ac79080020 394000007d40472a @@ -1073,31 +1073,31 @@ f92100903bc00000 7c0004ac7f60a72a 386000097f60af2a 3860000f4bfff521 -3c60c0104bfff555 +3c60c8004bfff555 606308147f44d378 4bfff64178630020 -3c60c010e8810088 +3c60c800e8810088 786300206063082c e88100904bfff62d -606308443c60c010 +606308443c60c800 4bfff61978630020 -3881006c3c60c010 +3881006c3c60c800 786300206063085c -3d20c0104bfff605 +3d20c8004bfff605 7929002061290854 7f604f2a7c0004ac -612908583d20c010 +612908583d20c800 7c0004ac79290020 -3d40c0107f604f2a +3d40c8007f604f2a 614a084c39200017 7c0004ac794a0020 -3d40c0107d20572a +3d40c8007d20572a 614a085039200001 7c0004ac794a0020 -3d20c0107d20572a +3d20c8007d20572a 792900206129083c 7f604f2a7c0004ac -612908403d20c010 +612908403d20c800 7c0004ac79290020 e86100987f604f2a 7fe4fb787fa5eb78 @@ -1135,14 +1135,14 @@ f94100a0e8810080 7fc5f3783c62ffff 38637fb87fe4fb78 600000004bffecc5 -612900143d20c010 +612900143d20c800 7c0004ac79290020 -3d00c0107f204f2a +3d00c8007f204f2a 6108002039400001 7c0004ac79080020 394000007d40472a 7d404f2a7c0004ac -3d00c0107bde0020 +3d00c8007bde0020 6108002438de0001 394000017cc903a6 38e0000079080020 @@ -1162,19 +1162,19 @@ f94100a0e8810080 384291b83c4c0001 3c62ffff7c0802a6 48000c9138637f70 -3f60c010f821ff71 +3f60c800f821ff71 637b10003be00000 4bffebd17b7b0020 7c0004ac60000000 -3f40c0107fe0df2a +3f40c8007fe0df2a 7b5a0020635a1004 7fe0d72a7c0004ac -4bfff78d3fa0c010 +4bfff78d3fa0c800 7bbd002063bd080c 7fe0ef2a7c0004ac -63de08103fc0c010 +63de08103fc0c800 7c0004ac7bde0020 -3f80c0107fe0f72a +3f80c8007fe0f72a 639c08003920000c 7c0004ac7b9c0020 386000007d20e72a @@ -1699,10 +1699,10 @@ e8010010ebc1fff0 000000000000002d 30252d2b64323025 0000000000006432 -00000000c0100818 -00000000c0100830 -00000000c0100848 -00000000c0100860 +00000000c8000818 +00000000c8000830 +00000000c8000848 +00000000c8000860 6f6e204d41524453 207265646e752077 6572617764726168 diff --git a/litedram/generated/sim/litedram_core.init b/litedram/generated/sim/litedram_core.init index 53fc945..cd9dd30 100644 --- a/litedram/generated/sim/litedram_core.init +++ b/litedram/generated/sim/litedram_core.init @@ -724,16 +724,16 @@ a12100a660000000 4bfff9a938637dd0 000000004bfffd78 0000088003000000 -612908043d20c010 +612908043d20c800 7c0004ac79290020 -3d40c0107c604f2a +3d40c8007c604f2a 614a080839200001 7c0004ac794a0020 4e8000207d20572a 0000000000000000 3c4c000100000000 7c0802a638429414 -614a08003d40c010 +614a08003d40c800 794a00203920000e f821ffa1f8010010 7d20572a7c0004ac @@ -744,7 +744,7 @@ e801001038210060 0100000000000000 3c4c000100000080 7c0802a6384293bc -614a08003d40c010 +614a08003d40c800 794a002039200001 f821ffa1f8010010 7d20572a7c0004ac @@ -851,19 +851,19 @@ e801001038210060 384290703c4c0001 600000007c0802a6 48000c6938628048 -3f60c010f821ff71 +3f60c800f821ff71 637b10003be00000 4bfff5897b7b0020 7c0004ac60000000 -3f40c0107fe0df2a +3f40c8007fe0df2a 7b5a0020635a1004 7fe0d72a7c0004ac -4bfffc113fa0c010 +4bfffc113fa0c800 7bbd002063bd080c 7fe0ef2a7c0004ac -63de08103fc0c010 +63de08103fc0c800 7c0004ac7bde0020 -3d20c0107fe0f72a +3d20c8007fe0f72a 612908003940000c 7c0004ac79290020 7c0004ac7d404f2a diff --git a/soc.vhdl b/soc.vhdl index 6a3166d..eed5fe2 100644 --- a/soc.vhdl +++ b/soc.vhdl @@ -22,9 +22,17 @@ use work.wishbone_types.all; -- 0xc0002000: UART0 -- 0xc0004000: XICS ICP -- 0xc0006000: SPI Flash controller --- 0xc0100000: LiteDRAM control (CSRs) +-- 0xc8nnnnnn: External IO bus -- 0xf0000000: Flash "ROM" mapping --- 0xff000000: DRAM init code (if any) or flash ROM +-- 0xff000000: DRAM init code (if any) or flash ROM (**) + +-- External IO bus: +-- 0xc8000000: LiteDRAM control (CSRs) + +-- (**) DRAM init code is currently special and goes to the external +-- IO bus, this will be fixed when it's moved out of litedram and +-- into the main SoC once we have a common "firmware". + entity soc is generic ( @@ -46,13 +54,15 @@ entity soc is rst : in std_ulogic; system_clk : in std_ulogic; - -- DRAM controller signals + -- "Large" (64-bit) DRAM wishbone wb_dram_in : out wishbone_master_out; wb_dram_out : in wishbone_slave_out := wishbone_slave_out_init; - wb_dram_ctrl_in : out wb_io_master_out; - wb_dram_ctrl_out : in wb_io_slave_out := wb_io_slave_out_init; - wb_dram_is_csr : out std_ulogic; - wb_dram_is_init : out std_ulogic; + + -- "Small" (32-bit) external IO wishbone + wb_ext_io_in : out wb_io_master_out; + wb_ext_io_out : in wb_io_slave_out := wb_io_slave_out_init; + wb_ext_is_dram_csr : out std_ulogic; + wb_ext_is_dram_init : out std_ulogic; -- UART0 signals: uart0_txd : out std_ulogic; @@ -153,15 +163,14 @@ architecture behaviour of soc is signal rst_wbdb : std_ulogic := '1'; signal alt_reset_d : std_ulogic; - -- IO branch split: - type slave_io_type is (SLAVE_IO_SYSCON, - SLAVE_IO_UART, - SLAVE_IO_DRAM_INIT, - SLAVE_IO_DRAM_CSR, - SLAVE_IO_ICP_0, - SLAVE_IO_SPI_FLASH_REG, - SLAVE_IO_SPI_FLASH_MAP, - SLAVE_IO_NONE); + -- IO branch split: + type slave_io_type is (SLAVE_IO_SYSCON, + SLAVE_IO_UART, + SLAVE_IO_ICP_0, + SLAVE_IO_SPI_FLASH_REG, + SLAVE_IO_SPI_FLASH_MAP, + SLAVE_IO_EXTERNAL, + SLAVE_IO_NONE); signal slave_io_dbg : slave_io_type; begin @@ -426,25 +435,26 @@ begin -- IO wishbone slave intercon. -- slave_io_intercon: process(wb_sio_out, wb_syscon_out, wb_uart0_out, - wb_dram_ctrl_out, wb_xics0_out, wb_spiflash_out) + wb_ext_io_out, wb_xics0_out, wb_spiflash_out) variable slave_io : slave_io_type; variable match : std_ulogic_vector(31 downto 12); + variable ext_valid : boolean; begin -- Simple address decoder. slave_io := SLAVE_IO_NONE; match := "11" & wb_sio_out.adr(29 downto 12); if std_match(match, x"FF---") and HAS_DRAM then - slave_io := SLAVE_IO_DRAM_INIT; + slave_io := SLAVE_IO_EXTERNAL; elsif std_match(match, x"F----") then slave_io := SLAVE_IO_SPI_FLASH_MAP; elsif std_match(match, x"C0000") then slave_io := SLAVE_IO_SYSCON; elsif std_match(match, x"C0002") then slave_io := SLAVE_IO_UART; - elsif std_match(match, x"C01--") then - slave_io := SLAVE_IO_DRAM_CSR; + elsif std_match(match, x"C8---") then + slave_io := SLAVE_IO_EXTERNAL; elsif std_match(match, x"C0004") then slave_io := SLAVE_IO_ICP_0; elsif std_match(match, x"C0006") then @@ -464,35 +474,41 @@ begin wb_xics0_in.adr(7 downto 0) <= wb_sio_out.adr(7 downto 0); wb_xics0_in.cyc <= '0'; - wb_dram_ctrl_in <= wb_sio_out; - wb_dram_ctrl_in.cyc <= '0'; - wb_dram_is_csr <= '0'; - wb_dram_is_init <= '0'; + wb_ext_io_in <= wb_sio_out; + wb_ext_io_in.cyc <= '0'; wb_syscon_in <= wb_sio_out; wb_syscon_in.cyc <= '0'; + wb_ext_is_dram_csr <= '0'; + wb_ext_is_dram_init <= '0'; + + -- Default response, ack & return all 1's + wb_sio_in.dat <= (others => '1'); + wb_sio_in.ack <= wb_sio_out.stb and wb_sio_out.cyc; + wb_sio_in.stall <= '0'; + case slave_io is - when SLAVE_IO_DRAM_INIT => - if HAS_DRAM then - wb_dram_ctrl_in.cyc <= wb_sio_out.cyc; - wb_sio_in <= wb_dram_ctrl_out; - else - wb_sio_in.ack <= wb_sio_out.cyc and wb_sio_out.stb; - wb_sio_in.dat <= (others => '1'); - wb_sio_in.stall <= '0'; + when SLAVE_IO_EXTERNAL => + -- Ext IO "chip selects" + -- + -- DRAM init is special at 0xFF* so we just test the top + -- bit. Everything else is at 0xC8* so we test only bits + -- 23 downto 16. + -- + ext_valid := false; + if wb_sio_out.adr(29) = '1' and HAS_DRAM then -- DRAM init is special + wb_ext_is_dram_init <= '1'; + ext_valid := true; + elsif wb_sio_out.adr(23 downto 16) = x"00" and HAS_DRAM then + wb_ext_is_dram_csr <= '1'; + ext_valid := true; end if; - wb_dram_is_init <= '1'; - when SLAVE_IO_DRAM_CSR => - if HAS_DRAM then - wb_dram_ctrl_in.cyc <= wb_sio_out.cyc; - wb_sio_in <= wb_dram_ctrl_out; - else - wb_sio_in.ack <= wb_sio_out.cyc and wb_sio_out.stb; - wb_sio_in.dat <= (others => '1'); - wb_sio_in.stall <= '0'; + if ext_valid then + wb_ext_io_in.cyc <= wb_sio_out.cyc; + wb_sio_in <= wb_ext_io_out; end if; - wb_dram_is_csr <= '1'; + when SLAVE_IO_SYSCON => wb_syscon_in.cyc <= wb_sio_out.cyc; wb_sio_in <= wb_syscon_out; @@ -514,9 +530,6 @@ begin wb_sio_in <= wb_spiflash_out; wb_spiflash_is_reg <= '1'; when others => - wb_sio_in.dat <= (others => '1'); - wb_sio_in.ack <= wb_sio_out.stb and wb_sio_out.cyc; - wb_sio_in.stall <= '0'; end case; end process;