firmware: Sayma RTM FPGA bitstream loading prototype (#813).

artiq/firmware/libboard_artiq/lib.rs

@@ -1,4 +1,3 @@
-#![feature(asm, lang_items)]
 #![no_std]
 
 #[macro_use]
@@ -25,3 +24,5 @@ mod ad9154_reg;
 pub mod ad9154;
 #[cfg(has_allaki_atts)]
 pub mod hmc542;
+#[cfg(has_rtm_fpga_cfg)]
+pub mod rtm_fpga;

artiq/firmware/libboard_artiq/rtm_fpga.rs

@@ -0,0 +1,46 @@
+use core::slice;
+use board::csr::rtm_fpga_cfg;
+use board::clock;
+
+const ADDR: *const u8 = 0x150000 as *const u8;
+
+pub fn program_bitstream() -> Result<(), ()> {
+    unsafe {
+        let length    = *(ADDR as *const usize);
+        let bitstream = slice::from_raw_parts(ADDR.offset(4) as *const u32, length / 4);
+
+        debug!("resetting");
+
+        rtm_fpga_cfg::divisor_write(15);
+        rtm_fpga_cfg::program_write(1);
+        clock::spin_us(1000);
+        rtm_fpga_cfg::program_write(0);
+        clock::spin_us(1000);
+
+        while rtm_fpga_cfg::error_read() != 0 {}
+
+        debug!("programming");
+
+        for word in bitstream {
+            rtm_fpga_cfg::data_write(*word);
+            rtm_fpga_cfg::start_write(1);
+            while rtm_fpga_cfg::busy_read() == 1 {}
+        }
+
+        debug!("finishing");
+
+        loop {
+            if rtm_fpga_cfg::error_read() != 0 {
+                error!("programming error");
+
+                return Err(())
+            }
+
+            if rtm_fpga_cfg::done_read() != 0 {
+                debug!("done");
+
+                return Ok(())
+            }
+        }
+    }
+}

artiq/firmware/runtime/main.rs

@@ -49,11 +49,20 @@ mod moninj;
 mod analyzer;
 
 fn startup() {
+    log::set_max_level(log::LevelFilter::TRACE);
+    logger_artiq::BufferLogger::with(|logger|
+        logger.set_uart_log_level(log::LevelFilter::TRACE));
+
     board::clock::init();
     info!("ARTIQ runtime starting...");
     info!("software version {}", include_str!(concat!(env!("OUT_DIR"), "/git-describe")));
     info!("gateware version {}", board::ident::read(&mut [0; 64]));
 
+    #[cfg(has_rtm_fpga_cfg)]
+    board_artiq::rtm_fpga::program_bitstream().expect("cannot program RTM FPGA");
+    #[cfg(has_serwb_phy_amc)]
+    board_artiq::serwb::wait_init();
+
     match config::read_str("log_level", |r| r.map(|s| s.parse())) {
         Ok(Ok(log_level_filter)) => {
             info!("log level set to {} by `log_level` config key",
@@ -72,9 +81,6 @@ fn startup() {
         _ => info!("UART log level set to INFO by default")
     }
 
-    #[cfg(has_serwb_phy_amc)]
-    board_artiq::serwb::wait_init();
-
     let t = board::clock::get_ms();
     info!("press 'e' to erase startup and idle kernels...");
     while board::clock::get_ms() < t + 1000 {

artiq/frontend/artiq_flash.py

@@ -6,6 +6,7 @@ import subprocess
 import tempfile
 import shutil
 import re
+import io
 import atexit
 from functools import partial
 from collections import defaultdict
@@ -278,6 +279,7 @@ def main():
             "bootloader": ("spi1", 0x000000),
             "storage":    ("spi1", 0x040000),
             "firmware":   ("spi1", 0x050000),
+            "rtm_gateware": ("spi1", 0x150000),
         },
     }[args.target]
 
@@ -309,18 +311,30 @@ def main():
         else:
             return os.path.join(args.srcbuild, *path_filename)
 
+    def convert_gateware(bit_filename, prefix_size=False):
+        bin_io = io.BytesIO()
+        with open(bit_filename, "rb") as bit_file:
+            bit2bin(bit_file, bin_io)
+        bin_data = bin_io.getvalue()
+
+        bin_handle, bin_filename = tempfile.mkstemp(
+            prefix="artiq_", suffix="_" + os.path.basename(bit_filename))
+        with open(bin_handle, "wb") as bin_file:
+            if prefix_size:
+                bin_file.write(len(bin_data).to_bytes(4, byteorder="big"))
+            bin_file.write(bin_data)
+        atexit.register(lambda: os.unlink(bin_filename))
+        return bin_filename
+
     try:
         for action in args.action:
             if action == "gateware":
-                gateware_bin = artifact_path(variant, "gateware", "top.bin")
+                gateware_bin = convert_gateware(artifact_path(variant, "gateware", "top.bit"))
-                if not os.access(gateware_bin, os.R_OK):
-                    bin_handle, gateware_bin = tempfile.mkstemp()
-                    gateware_bit = artifact_path(variant, "gateware", "top.bit")
-                    with open(gateware_bit, "rb") as bit_file, open(bin_handle, "wb") as bin_file:
-                        bit2bin(bit_file, bin_file)
-                    atexit.register(lambda: os.unlink(gateware_bin))
-
                 programmer.write_binary(*config["gateware"], gateware_bin)
+
+                if args.target == "sayma":
+                    rtm_gateware_bin = convert_gateware(artifact_path("rtm_gateware", "top.bit"))
+                    programmer.write_binary(*config["rtm_gateware"], rtm_gateware_bin)
             elif action == "bootloader":
                 bootloader_bin = artifact_path(variant, "software", "bootloader", "bootloader.bin")
                 programmer.write_binary(*config["bootloader"], bootloader_bin)