some predefined registers for Cortex M (#190)

build/build.zig

@@ -130,6 +130,7 @@ pub fn add_firmware(
             .target = mz.host_build.resolveTargetQuery(chip.cpu.target),
             .linkage = .static,
             .root_source_file = .{ .cwd_relative = mz.microzig_core.builder.pathFromRoot("src/start.zig") },
+            .strip = options.strip,
         }),
         .target = options.target,
         .output_files = Firmware.OutputFileMap.init(host_build.allocator),
@@ -358,6 +359,8 @@ pub const FirmwareOptions = struct {
 
     /// If set, overrides the `linker_script` property of the target.
     linker_script: ?LazyPath = null,
+
+    strip: bool = false,
 };
 
 /// Configuration options for firmware installation.

core/build.zig

@@ -29,7 +29,7 @@ pub const cpus = struct {
 
     pub const cortex_m0 = MicroZig.Cpu{
         .name = "ARM Cortex-M0",
-        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex-m.zig" },
+        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex_m.zig" },
         .target = std.zig.CrossTarget{
             .cpu_arch = .thumb,
             .cpu_model = .{ .explicit = &std.Target.arm.cpu.cortex_m0 },
@@ -40,7 +40,7 @@ pub const cpus = struct {
 
     pub const cortex_m0plus = MicroZig.Cpu{
         .name = "ARM Cortex-M0+",
-        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex-m.zig" },
+        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex_m.zig" },
         .target = std.zig.CrossTarget{
             .cpu_arch = .thumb,
             .cpu_model = .{ .explicit = &std.Target.arm.cpu.cortex_m0plus },
@@ -51,7 +51,7 @@ pub const cpus = struct {
 
     pub const cortex_m3 = MicroZig.Cpu{
         .name = "ARM Cortex-M3",
-        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex-m.zig" },
+        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex_m.zig" },
         .target = std.zig.CrossTarget{
             .cpu_arch = .thumb,
             .cpu_model = .{ .explicit = &std.Target.arm.cpu.cortex_m3 },
@@ -62,7 +62,7 @@ pub const cpus = struct {
 
     pub const cortex_m4 = MicroZig.Cpu{
         .name = "ARM Cortex-M4",
-        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex-m.zig" },
+        .root_source_file = .{ .path = build_root ++ "/src/cpus/cortex_m.zig" },
         .target = std.zig.CrossTarget{
             .cpu_arch = .thumb,
             .cpu_model = .{ .explicit = &std.Target.arm.cpu.cortex_m4 },

core/src/cpus/cortex_m.zig

@@ -3,28 +3,49 @@ const microzig = @import("microzig");
 const mmio = microzig.mmio;
 const root = @import("root");
 
-pub const regs = struct {
-    // Interrupt Control and State Register
-    pub const ICSR: *volatile mmio.Mmio(packed struct {
-        VECTACTIVE: u9,
-        reserved0: u2,
-        RETTOBASE: u1,
-        VECTPENDING: u9,
-        reserved1: u1,
-        ISRPENDING: u1,
-        ISRPREEMPT: u1,
-        reserved2: u1,
-        PENDSTCLR: u1,
-        PENDSTSET: u1,
-        PENDSVCLR: u1,
-        PENDSVSET: u1,
-        reserved3: u2,
-        NMIPENDSET: u1,
-    }) = @ptrFromInt(0xE000ED04);
+const scs_base = 0xE000E000;
+const itm_base = 0xE0000000;
+const dwt_base = 0xE0001000;
+const tpi_base = 0xE0040000;
+const coredebug_base = 0xE000EDF0;
+const systick_base = scs_base + 0x0010;
+const nvic_base = scs_base + 0x0100;
+const scb_base = scs_base + 0x0D00;
+const mpu_base = scs_base + 0x0D90;
+
+const Core = enum {
+    @"ARM Cortex-M0",
+    @"ARM Cortex-M0+",
+    @"ARM Cortex-M3",
+    @"ARM Cortex-M4",
+};
+
+const core: type = blk: {
+    const cortex_m = std.meta.stringToEnum(microzig.config.cpu_name) orelse @panic(std.fmt.comptimePrint("Unrecognized Cortex-M core name: {s}", .{microzig.config.cpu_name}));
+    break :blk switch (cortex_m) {
+        .@"ARM Cortex-M0" => @import("cortex_m/m0"),
+        .@"ARM Cortex-M0+" => @import("cortex_m/m0plus.zig"),
+        .@"ARM Cortex-M3" => @import("cortex_m/m3.zig"),
+        .@"ARM Cortex-M4" => @import("cortex_m/m4.zig"),
+    };
 };
 
+const properties = microzig.chip.properties;
+// TODO: will have to standardize this with regz code generation
+const mpu_present = @hasDecl(properties, "__MPU_PRESENT") and std.mem.eql(u8, properties.__MPU_PRESENT, "1");
+
+/// System Control Block (SCB)
+pub const scb: *volatile core.SystemControlBlock = @ptrFromInt(scb_base);
+/// Nested Vector Interrupt Controller (NVIC)
+pub const nvic: *volatile core.NestedVectorInterruptController = @ptrFromInt(nvic_base);
+/// Memory Protection Unit (MPU)
+pub const mpu: *volatile core.MemoryProtectionUnit = if (mpu_present)
+    @ptrFromInt(mpu_base)
+else
+    @compileError("Cortex-M does not have an MPU");
+
 pub fn executing_isr() bool {
-    return regs.ICSR.read().VECTACTIVE != 0;
+    return scb.ICSR.read().VECTACTIVE != 0;
 }
 
 pub fn enable_interrupts() void {

core/src/cpus/cortex_m/m0.zig

@@ -0,0 +1,3 @@
+pub const SystemControlBlock = @compileError("TODO");
+pub const NestedVectorInterruptController = @compileError("TODO");
+pub const MemoryProtectionUnit = @compileError("TODO");

core/src/cpus/cortex_m/m0plus.zig

@@ -0,0 +1,3 @@
+pub const SystemControlBlock = @compileError("TODO");
+pub const NestedVectorInterruptController = @compileError("TODO");
+pub const MemoryProtectionUnit = @compileError("TODO");

core/src/cpus/cortex_m/m3.zig

@@ -0,0 +1,3 @@
+pub const SystemControlBlock = @compileError("TODO");
+pub const NestedVectorInterruptController = @compileError("TODO");
+pub const MemoryProtectionUnit = @compileError("TODO");

core/src/cpus/cortex_m/m4.zig

@@ -0,0 +1,156 @@
+const microzig = @import("microzig");
+const mmio = microzig.mmio;
+
+pub const SystemControlBlock = extern struct {
+    /// CPUID Base Register
+    CPUID: u32,
+    /// Interrupt Control and State Register
+    ICSR: mmio.Mmio(packed struct(u32) {
+        VECTACTIVE: u9,
+        reserved0: u2 = 0,
+        RETTOBASE: u1,
+        VECTPENDING: u9,
+        reserved1: u1 = 0,
+        ISRPENDING: u1,
+        ISRPREEMPT: u1,
+        reserved2: u1 = 0,
+        PENDSTCLR: u1,
+        PENDSTSET: u1,
+        PENDSVCLR: u1,
+        PENDSVSET: u1,
+        reserved3: u2 = 0,
+        NMIPENDSET: u1,
+    }),
+    /// Vector Table Offset Register
+    VTOR: u32,
+    /// Application Interrupt  and Reset Control Register
+    AIRCR: u32,
+    /// System Control Register
+    SCR: u32,
+    /// Configuration Control Register
+    CCR: mmio.Mmio(packed struct(u32) {
+        NONBASETHRDENA: u1,
+        USERSETMPEND: u1,
+        _reserved0: u1 = 0,
+        UNALIGN_TRP: u1,
+        DIV_0_TRP: u1,
+        _reserved1: u3 = 0,
+        BFHFNMIGN: u1,
+        STKALIGN: u1,
+        _padding: u22 = 0,
+    }),
+    /// System Handlers Priority Registers
+    SHP: [12]u8,
+    /// System Handler Contol and State Register
+    SHCSR: u32,
+    /// Configurable Fault Status Register
+    CFSR: u32,
+    /// HardFault Status Register
+    HFSR: u32,
+    /// Debug Fault Status Register
+    DFSR: u32,
+    /// MemManage Fault Address Register
+    MMFAR: u32,
+    /// BusFault Address Register
+    BFAR: u32,
+    /// Auxilary Feature Register
+    AFSR: u32,
+    /// Processor Feature Register
+    PFR: [2]u32,
+    /// Debug Feature Register
+    DFR: u32,
+    /// Auxilary Feature Register
+    ADR: u32,
+    /// Memory Model Feature Register
+    MMFR: [4]u32,
+    /// Instruction Set Attributes Register
+    ISAR: [5]u32,
+    RESERVED0: [5]u32,
+    /// Coprocessor Access Control Register
+    CPACR: u32,
+};
+
+pub const NestedVectorInterruptController = extern struct {
+    ISER: [8]u32,
+    _reserved0: [24]u32,
+    ICER: [8]u32,
+    _reserved1: [24]u32,
+    ISPR: [8]u32,
+    _reserved2: [24]u32,
+    ICPR: [8]u32,
+    _reserved3: [24]u32,
+    IABR: [8]u32,
+    _reserved4: [56]u32,
+    IP: [240]u8,
+    _reserved5: [644]u32,
+    STIR: u32,
+};
+
+pub const MemoryProtectionUnit = extern struct {
+    /// MPU Type Register
+    TYPE: mmio.Mmio(packed struct(u32) {
+        SEPARATE: u1,
+        _reserved0: u7,
+        DREGION: u8,
+        IREGION: u8,
+        _reserved1: u8,
+    }),
+    /// MPU Control Register
+    CTRL: mmio.Mmio(packed struct(u32) {
+        ENABLE: u1,
+        HFNMIENA: u1,
+        PRIVDEFENA: u1,
+        padding: u29,
+    }),
+    /// MPU RNRber Register
+    RNR: mmio.Mmio(packed struct(u32) {
+        REGION: u8,
+        padding: u24,
+    }),
+    /// MPU Region Base Address Register
+    RBAR: RBAR,
+    /// MPU Region Attribute and Size Register
+    RASR: RASR,
+    /// MPU Alias 1 Region Base Address Register
+    RBAR_A1: RBAR,
+    /// MPU Alias 1 Region Attribute and Size Register
+    RASR_A1: RASR,
+    /// MPU Alias 2 Region Base Address Register
+    RBAR_A2: RBAR,
+    /// MPU Alias 2 Region Attribute and Size Register
+    RASR_A2: RASR,
+    /// MPU Alias 3 Region Base Address Register
+    RBAR_A3: RBAR,
+    /// MPU Alias 3 Region Attribute and Size Register
+    RASR_A3: RASR,
+
+    pub const RBAR = mmio.Mmio(packed struct(u32) {
+        REGION: u4,
+        VALID: u1,
+        ADDR: u27,
+    });
+
+    pub const RASR = mmio.Mmio(packed struct(u32) {
+        /// Region enable bit
+        ENABLE: u1,
+        /// Region Size
+        SIZE: u5,
+        _reserved0: u2,
+        /// Sub-Region Disable
+        SRD: u8,
+        /// ATTRS.B
+        B: u1,
+        /// ATTRS.C
+        C: u1,
+        /// ATTRS.S
+        S: u1,
+        /// ATTRS.TEX
+        TEX: u3,
+        _reserved1: u2,
+        /// ATTRS.AP
+        AP: u3,
+        /// ATTRS.XN
+        XN: u1,
+        padding: u4,
+    });
+};

tools/regz/src/atdf.zig

@@ -84,6 +84,10 @@ fn load_device(ctx: *Context, node: xml.Node) !void {
     if (node.find_child(&.{"interrupts"})) |interrupts_node|
         try load_interrupts(ctx, interrupts_node, id);
 
+    var param_it = node.iterate(&.{"parameters"}, &.{"param"});
+    while (param_it.next()) |param_node|
+        try load_param(ctx, param_node, id);
+
     try infer_peripheral_offsets(ctx);
     try infer_enum_sizes(ctx);
 
@@ -98,11 +102,26 @@ fn load_device(ctx: *Context, node: xml.Node) !void {
     // events.generators.generator
     // events.users.user
     // interfaces.interface.parameters.param
-    // parameters.param
 
     // property-groups.property-group.property
 }
 
+fn load_param(ctx: *Context, node: xml.Node, device_id: EntityId) !void {
+    const db = ctx.db;
+    assert(db.entity_is("instance.device", device_id));
+    validate_attrs(node, &.{
+        "name",
+        "value",
+    });
+
+    const name = node.get_attribute("name") orelse return error.MissingParamName;
+    const value = node.get_attribute("value") orelse return error.MissingParamName;
+    // TODO: do something with caption
+    _ = node.get_attribute("caption");
+
+    try db.add_device_property(device_id, name, value);
+}
+
 fn load_interrupts(ctx: *Context, node: xml.Node, device_id: EntityId) !void {
     var interrupt_it = node.iterate(&.{}, &.{"interrupt"});
     while (interrupt_it.next()) |interrupt_node|