[rp2xxx] Add initial riscv support for the rp2350 chip

build-internals/build.zig

@@ -5,6 +5,8 @@ const Module = Build.Module;
 
 const regz = @import("regz");
 const Patch = regz.patch.Patch;
+const uf2 = @import("uf2");
+const FamilyId = uf2.FamilyId;
 
 pub fn build(b: *Build) void {
     _ = b.addModule("build-internals", .{
@@ -110,6 +112,7 @@ pub const Chip = struct {
     /// The memory regions that are present in this chip.
     memory_regions: []const MemoryRegion,
 
+    /// Register patches for this chip.
     patches: []const Patch = &.{},
 };
 
@@ -172,54 +175,7 @@ pub const BinaryFormat = union(enum) {
     dfu,
 
     /// The [USB Flashing Format (UF2)](https://github.com/microsoft/uf2) designed by Microsoft.
-    uf2: enum {
-        ATMEGA32,
-        SAML21,
-        NRF52,
-        ESP32,
-        STM32L1,
-        STM32L0,
-        STM32WL,
-        LPC55,
-        STM32G0,
-        GD32F350,
-        STM32L5,
-        STM32G4,
-        MIMXRT10XX,
-        STM32F7,
-        SAMD51,
-        STM32F4,
-        FX2,
-        STM32F2,
-        STM32F1,
-        NRF52833,
-        STM32F0,
-        SAMD21,
-        STM32F3,
-        STM32F407,
-        STM32H7,
-        STM32WB,
-        ESP8266,
-        KL32L2,
-        STM32F407VG,
-        NRF52840,
-        ESP32S2,
-        ESP32S3,
-        ESP32C3,
-        ESP32C2,
-        ESP32H2,
-        RP2040,
-        RP2XXX_ABSOLUTE,
-        RP2XXX_DATA,
-        RP2350_ARM_S,
-        RP2350_RISC_V,
-        RP2350_ARM_NS,
-        STM32L4,
-        GD32VF103,
-        CSK4,
-        CSK6,
-        M0SENSE,
-    },
+    uf2: uf2.FamilyId,
 
     /// The [firmware format](https://docs.espressif.com/projects/esptool/en/latest/esp32/advanced-topics/firmware-image-format.html) used by the [esptool](https://github.com/espressif/esptool) bootloader.
     esp,

build-internals/build.zig.zon

@@ -3,6 +3,7 @@
     .version = "0.0.0",
     .dependencies = .{
         .regz = .{ .path = "../tools/regz" },
+        .uf2 = .{ .path = "../tools/uf2" },
     },
     .paths = .{
         "LICENSE",

build.zig

@@ -448,6 +448,7 @@ pub fn MicroBuild(port_select: PortSelect) type {
                 .imports = options.imports,
             });
             app_mod.addImport("microzig", core_mod);
+            core_mod.addImport("app", app_mod);
 
             const fw = mb.builder.allocator.create(Firmware) catch @panic("out of memory");
             fw.* = .{

examples/raspberrypi/rp2xxx/src/changing_system_clocks.zig

@@ -9,12 +9,12 @@ const Pin = rp2xxx.gpio.Pin;
 
 /// The HAL provides a convenvience function for detecting which of the RP2XXX
 /// family you're currently compiling for.
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 // Use the system() preset helper to change the SYS and REF clock frequencies from default
 const system_clock_cfg = clocks.config.preset.system(
     // Reduce the system clock by a factor of 4 (different default clock speeds for RP2350/RP2040)
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => 125_000_000 / 4,
         .RP2350 => 150_000_000 / 4,
     },

examples/raspberrypi/rp2xxx/src/custom_clock_config.zig

@@ -10,7 +10,7 @@ const Pin = gpio.Pin;
 
 /// The HAL provides a convenvience function for detecting which of the RP2XXX
 /// family you're currently compiling for.
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const xosc_freq = microzig.board.xosc_freq;
 
@@ -84,7 +84,7 @@ const system_clock_cfg: GlobalConfig = val: {
     };
 
     // GlobalConfig has a slight difference between RP2350 (has HSTX) and RP2040 (has RTC)
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => {
             // Drive RTC off XOSC / 3 for a change of pace!
             temp.rtc = .{

examples/raspberrypi/rp2xxx/src/rp2040_only/adc.zig

@@ -6,7 +6,7 @@ const rp2xxx = microzig.hal;
 const gpio = rp2xxx.gpio;
 const adc = rp2xxx.adc;
 const time = rp2xxx.time;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const uart = rp2xxx.uart.instance.num(0);
 const baud_rate = 115200;
@@ -22,7 +22,7 @@ pub fn main() void {
         .temp_sensor_enabled = true,
     });
 
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/flash_id.zig

@@ -5,7 +5,7 @@ const rp2xxx = microzig.hal;
 const time = rp2xxx.time;
 const gpio = rp2xxx.gpio;
 const flash = rp2xxx.flash;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const uart = rp2xxx.uart.instance.num(0);
 const baud_rate = 115200;
@@ -24,7 +24,7 @@ pub const std_options = struct {
 };
 
 pub fn main() !void {
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/flash_program.zig

@@ -6,7 +6,7 @@ const flash = rp2xxx.flash;
 const time = rp2xxx.time;
 const gpio = rp2xxx.gpio;
 const clocks = rp2xxx.clocks;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const led = gpio.num(25);
 const uart = rp2xxx.uart.instance.num(0);
@@ -33,7 +33,7 @@ pub fn main() !void {
     led.set_direction(.out);
     led.put(1);
 
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/i2c_bus_scan.zig

@@ -5,7 +5,7 @@ const rp2xxx = microzig.hal;
 const i2c = rp2xxx.i2c;
 const gpio = rp2xxx.gpio;
 const peripherals = microzig.chip.peripherals;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 pub const microzig_options = .{
     .log_level = .info,
@@ -20,7 +20,7 @@ const uart_rx_pin = gpio.num(1);
 const i2c0 = i2c.instance.num(0);
 
 pub fn main() !void {
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/random.zig

@@ -9,7 +9,7 @@ const time = rp2xxx.time;
 const gpio = rp2xxx.gpio;
 const clocks = rp2xxx.clocks;
 const rand = rp2xxx.rand;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const led = gpio.num(25);
 const uart = rp2xxx.uart.instance.num(0);
@@ -33,7 +33,7 @@ pub fn main() !void {
     led.set_direction(.out);
     led.put(1);
 
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/uart_log.zig

@@ -5,7 +5,7 @@ const rp2xxx = microzig.hal;
 const time = rp2xxx.time;
 const gpio = rp2xxx.gpio;
 const clocks = rp2xxx.clocks;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const led = gpio.num(25);
 const uart = rp2xxx.uart.instance.num(0);
@@ -29,7 +29,7 @@ pub fn main() !void {
     led.set_direction(.out);
     led.put(1);
 
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/usb_cdc.zig

@@ -7,7 +7,7 @@ const time = rp2xxx.time;
 const gpio = rp2xxx.gpio;
 const clocks = rp2xxx.clocks;
 const usb = rp2xxx.usb;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const led = gpio.num(25);
 const uart = rp2xxx.uart.instance.num(0);
@@ -69,7 +69,7 @@ pub fn main() !void {
     led.set_direction(.out);
     led.put(1);
 
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

examples/raspberrypi/rp2xxx/src/rp2040_only/usb_hid.zig

@@ -7,7 +7,7 @@ const time = rp2xxx.time;
 const gpio = rp2xxx.gpio;
 const clocks = rp2xxx.clocks;
 const usb = rp2xxx.usb;
-const cpu = rp2xxx.compatibility.cpu;
+const chip = rp2xxx.compatibility.chip;
 
 const led = gpio.num(25);
 const uart = rp2xxx.uart.instance.num(0);
@@ -71,7 +71,7 @@ pub fn main() !void {
     led.set_direction(.out);
     led.put(1);
 
-    switch (cpu) {
+    switch (chip) {
         .RP2040 => inline for (&.{ uart_tx_pin, uart_rx_pin }) |pin| {
             pin.set_function(.uart);
         },

port/raspberrypi/rp2xxx/build.zig

@@ -6,12 +6,14 @@ const Self = @This();
 chips: struct {
     rp2040: *const microzig.Target,
     rp2350_arm: *const microzig.Target,
+    rp2350_riscv: *const microzig.Target,
 },
 
 boards: struct {
     raspberrypi: struct {
         pico: *const microzig.Target,
         pico2_arm: *const microzig.Target,
+        pico2_riscv: *const microzig.Target,
     },
     waveshare: struct {
         rp2040_plus_4m: *const microzig.Target,
@@ -51,7 +53,7 @@ pub fn init(dep: *std.Build.Dependency) Self {
         .linker_script = b.path("rp2040.ld"),
     };
 
-    const chip_rp2350: microzig.Target = .{
+    const chip_rp2350_arm: microzig.Target = .{
         .dep = dep,
         .preferred_binary_format = .{ .uf2 = .RP2350_ARM_S },
         .chip = .{
@@ -63,14 +65,57 @@ pub fn init(dep: *std.Build.Dependency) Self {
                 .abi = .eabi,
             },
             .register_definition = .{ .svd = b.path("src/chips/rp2350.svd") },
+            .memory_regions = &.{
+                .{ .kind = .flash, .offset = 0x10000000, .length = 2048 * 1024 },
+                .{ .kind = .ram, .offset = 0x20000000, .length = 256 * 1024 },
+            },
+        },
+        .hal = hal,
+        .linker_script = b.path("rp2350_arm.ld"),
+    };
+
+    const chip_rp2350_riscv: microzig.Target = .{
+        .dep = dep,
+        .preferred_binary_format = .{ .uf2 = .RP2350_RISC_V },
+        .chip = .{
+            .name = "RP2350",
+            .cpu = std.Target.Query{
+                .cpu_arch = .riscv32,
+                .cpu_model = .{ .explicit = &std.Target.riscv.cpu.generic_rv32 },
+                // the commented ones are in the datasheet but for some reason they break the code
+                .cpu_features_add = std.Target.riscv.featureSet(&.{
+                    // std.Target.riscv.Feature.c,
+                    std.Target.riscv.Feature.a,
+                    std.Target.riscv.Feature.m,
+                    std.Target.riscv.Feature.zba,
+                    std.Target.riscv.Feature.zbb,
+                    std.Target.riscv.Feature.zbs,
+                    // std.Target.riscv.Feature.zcb,
+                    // std.Target.riscv.Feature.zcmp,
+                    std.Target.riscv.Feature.zbkb,
+                    std.Target.riscv.Feature.zifencei,
+                }),
+                .os_tag = .freestanding,
+                .abi = .eabi,
+            },
+            .cpu_module_file = b.path("src/cpus/hazard3.zig"),
+            .register_definition = .{ .svd = b.path("src/chips/rp2350.svd") },
             .memory_regions = &.{
                 .{ .kind = .flash, .offset = 0x10000100, .length = (2048 * 1024) - 256 },
                 .{ .kind = .flash, .offset = 0x10000000, .length = 256 },
                 .{ .kind = .ram, .offset = 0x20000000, .length = 256 * 1024 },
             },
+            .patches = &.{
+                .{
+                    .override_arch = .{
+                        .device_name = "RP2350",
+                        .arch = .hazard3,
+                    },
+                },
+            },
         },
         .hal = hal,
-        .linker_script = b.path("rp2350.ld"),
+        .linker_script = b.path("rp2350_riscv.ld"),
     };
 
     const bootrom_rp2040 = get_bootrom(b, chip_rp2040.chip, .w25q080);
@@ -81,7 +126,8 @@ pub fn init(dep: *std.Build.Dependency) Self {
     return .{
         .chips = .{
             .rp2040 = chip_rp2040.derive(.{}),
-            .rp2350_arm = chip_rp2350.derive(.{}),
+            .rp2350_arm = chip_rp2350_arm.derive(.{}),
+            .rp2350_riscv = chip_rp2350_riscv.derive(.{}),
         },
         .boards = .{
             .raspberrypi = .{
@@ -93,7 +139,14 @@ pub fn init(dep: *std.Build.Dependency) Self {
                         .imports = rp2040_bootrom_imports,
                     },
                 }),
-                .pico2_arm = chip_rp2350.derive(.{
+                .pico2_arm = chip_rp2350_arm.derive(.{
+                    .board = .{
+                        .name = "RaspberryPi Pico 2",
+                        .url = "https://www.raspberrypi.com/products/raspberry-pi-pico2/",
+                        .root_source_file = b.path("src/boards/raspberry_pi_pico2.zig"),
+                    },
+                }),
+                .pico2_riscv = chip_rp2350_riscv.derive(.{
                     .board = .{
                         .name = "RaspberryPi Pico 2",
                         .url = "https://www.raspberrypi.com/products/raspberry-pi-pico2/",

port/raspberrypi/rp2xxx/build.zig.zon

@@ -13,6 +13,7 @@
         "patches",
         "tools",
         "rp2040.ld",
-        "rp2350.ld",
+        "rp2350_arm.ld",
+        "rp2350_riscv.ld",
     },
 }