initial commit

Signed-off-by: Sean Cross <sean@xobs.io>

.gitattributes

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+*.py text eol=lf
+*.dfu binary
+*.png binary
+*.jpg binary
+*.bin binary
+*.elf binary
+*.h text eol=lf
+*.c text eol=lf
+*.s text eol=lf
+*.S text eol=lf
+README.* text eol=lf
+LICENSE text eol=lf
+Makefile text eol=lf
+*.mk text eol=lf
+*.sh text eol=lf
+*.ps1 text eol=crlf
+.gitignore text eol=lf
+.gitattributes text eol=lf

.gitignore

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+/target
+**/*.rs.bk

README.md

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+# Platonic RISC-V Device
+
+Platonic is an ideal system useful for developing an operating system.  It does not represent any sort of real hardware, though differences between platforms is minimal.
+
+## Usage
+
+It is recommended to use Renode.

boot.resc

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+using sysbus
+mach create
+machine LoadPlatformDescription @platonic.repl
+
+machine StartGdbServer 3333
+
+showAnalyzer uart

platonic.repl

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+uart: UART.LiteX_UART @ {
+        sysbus 0x60001800;
+        sysbus 0xE0001800 // shadow
+    }
+
+rom: Memory.MappedMemory @ {
+        sysbus 0x00000000;
+        sysbus 0x80000000 // shadow
+    }
+    size: 0x00002000
+
+sram: Memory.MappedMemory @ {
+        sysbus 0x10000000;
+        sysbus 0x90000000 // shadow
+    }
+    size: 0x00020000
+
+cpu: CPU.VexRiscv @ sysbus
+    timeProvider: cpu_timer
+    cpuType: "rv32ima"
+    privilegeArchitecture: PrivilegeArchitecture.Priv1_10
+
+cpu_timer: Timers.LiteX_CPUTimer @ sysbus 0xf0000800
+    frequency: 66000000
+    // IRQ #100 is Machine Timer Interrupt
+    -> cpu@100
+
+timer0: Timers.LiteX_Timer @ {
+        sysbus 0x60002800;
+        sysbus 0xE0002800 // shadow
+    }
+    frequency: 12000000
+    -> cpu@0
+
+spi: SPI.PicoRV_SPI @ {
+    sysbus 0x60005000;
+    sysbus 0xe0005000 // shadow
+}
+
+flash: SPI.Micron_MT25Q @ spi
+    underlyingMemory: flash_mem
+
+flash_mem: Memory.MappedMemory @ {
+        sysbus 0x20000000;
+        sysbus 0xA0000000 // shadow
+    }
+    size: 0x4000000
+
+sysbus:
+    init:
+        Tag <0xe0000000 0x800> "CTRL"
+        Tag <0xE0006000 0x800> "REBOOT"
+        Tag <0xE0006800 0x800> "RGB"
+        Tag <0xE0007000 0x800> "VERSION"