target/ast1060-evb/mctp-requester/system.json5

// Licensed under the Apache-2.0 license

// AST1060-EVB MCTP Echo Server + Client Configuration
// ARM Cortex-M4 @ 200 MHz
// 768KB SRAM (640KB usable), executes from RAM
//
// Memory Layout (PMSAv7-friendly, power-of-2 aligned regions):
// FIXED: Kernel RAM now comes BEFORE application RAM to avoid boot crashes
//   0x00000000 - 0x00000800: Vector table + kernel annotations (2048 bytes)
//   0x00000800 - 0x00020000: Kernel flash (~126KB)
//   0x00020000 - 0x00040000: i2c_server flash (128KB)
//   0x00040000 - 0x00060000: mctp_server flash (128KB)
//   0x00060000 - 0x00080000: Kernel RAM (128KB)
//   0x00080000 - 0x00090000: i2c_server RAM (64KB)
//   0x00090000 - 0x000A0000: mctp_server RAM (64KB)
//
// Total: 0xA0000 = 640KB (fits within the 640KB usable window of the AST1060's 768KB SRAM).
{
    arch: {
        type: "armv7m",
        vector_table_start_address: 0x00000000,
        vector_table_size_bytes: 2048,  // 0x800 (vector table + process annotations for all 3 apps)
    },
    kernel: {
        flash_start_address: 0x00000800,  // After vector table + annotations
        flash_size_bytes: 129024,         // 0x1F800: ends at exactly 0x20000 (128KB boundary)
        ram_start_address: 0x00060000,    // Kernel RAM comes FIRST, before all app RAM
        ram_size_bytes: 131072,           // 128KB
    },
    apps: [
        // ──── I2C Server ────
        // Owns the AST1060 I2C controllers.
        // The MCTP server uses I2C as its transport.
        {
            name: "i2c_server",
            flash_size_bytes: 131072,     // 128KB for server code
            ram_size_bytes: 65536,        // 64KB RAM (register maps + buffers)
            processes: [
                {
                    name: "i2c server process",
                objects: [
                    {
                        name: "I2C",
                        type: "channel_handler",  // Server side of client→server channel
                    },
                    //{
                    //    // AST1060 I2C2 combined master+slave interrupt (IRQ 112).
                    //    name: "I2C2_IRQ",
                    //    type: "interrupt",
                    //    irqs: [
                    //        {
                    //            name: "i2c2",
                    //            number: 112,
                    //        },
                    //    ],
                    //},
                    {
                        name: "WG",
                        type: "wait_group",
                    },
                ],
                threads: [
                    {
                        name: "i2c server thread",
                        stack_size_bytes: 4096,   // 4KB stack
                    },
                ],                
                memory_mappings: [
                    {
                        // AST1060 I2C peripheral block: I2cglobal through I2cFilter
                        // Base: 0x7e7b0000, covers all 14 controllers + buffers + filter
                        name: "i2c_regs",
                        type: "device",
                        start_address: 0x7e7b0000,
                        size_bytes: 0x4000,
                    },
                    {
                        // SCU register block — scu310 at +0x310 is read by
                        // ClockConfig::from_hardware() to derive APB clock frequency.
                        name: "scu",
                        type: "device",
                        start_address: 0x7e6e2000,
                        size_bytes: 0x1000,
                    },
                ],
                },
            ],
        },
        // ──── MCTP Server ────
        // Runs the MCTP stack + in-process SPDM requester. Same footprint
        // as the responder variant; only the app name differs.
        {
            name: "mctp_server_requester",
            flash_size_bytes: 65536,      // 64KB for MCTP server code
            ram_size_bytes: 65536,        // 64KB RAM (Router state + SPDM context + buffers)
            processes: [
                {
                    name: "mctp server process",
                    objects: [
                        {
                            name: "MCTP",
                            type: "channel_handler",  // Server side: echo client → MCTP server
                        },
                        {
                            name: "I2C",
                            type: "channel_initiator",  // Client side: MCTP server → I2C server
                            handler_process: "i2c server process",
                            handler_object_name: "I2C",
                        },
                        {
                            name: "WG",
                            type: "wait_group",
                        },
                    ],
                    threads: [
                        {
                            name: "mctp server thread",
                            stack_size_bytes: 32768,   // 8KB stack (Router + fragmentation buffers)
                        },
                    ],
                },
            ],
        },
    ],
}