main: just test for qspi flash

reduces .text size by 740 bytes

experiments/src/main.rs

@@ -1,32 +1,16 @@
 #![no_std]
 #![no_main]
 
-use core::mem::transmute;
-use libcortex_a9::mutex::Mutex;
 use libboard_zynq::{print, println, self as zynq, clocks::Clocks, clocks::source::{ClockSource, ArmPll, IoPll}};
-use libsupport_zynq::{
+use libsupport_zynq as _;
-    ram, alloc::{vec, vec::Vec},
-    boot,
-    smoltcp::wire::{EthernetAddress, IpAddress, IpCidr},
-    smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder},
-    smoltcp::time::Instant,
-    smoltcp::socket::SocketSet,
-    smoltcp::socket::{TcpSocket, TcpSocketBuffer},
-};
-
-const HWADDR: [u8; 6] = [0, 0x23, 0xde, 0xea, 0xbe, 0xef];
-
-static mut STACK_CORE1: [u32; 512] = [0; 512];
 
 #[no_mangle]
 pub fn main_core0() {
-    // zynq::clocks::CpuClocks::enable_io(1_250_000_000);
     println!("\nzc706 main");
-    {
+    let clocks = zynq::clocks::Clocks::get();
-        use libregister::RegisterR;
+    println!("CPU Clocks: {}/{}/{}/{}", clocks.cpu_6x4x(), clocks.cpu_3x2x(), clocks.cpu_2x(), clocks.cpu_1x());
-        println!("Boot mode: {:?}", zynq::slcr::RegisterBlock::new().boot_mode.read().boot_mode_pins());
-    }
 
+    // Clock setup
     #[cfg(feature = "target_zc706")]
     const CPU_FREQ: u32 = 800_000_000;
     #[cfg(feature = "target_cora_z7_10")]
@@ -41,6 +25,7 @@ pub fn main_core0() {
     let clocks = zynq::clocks::Clocks::get();
     println!("CPU Clocks: {}/{}/{}/{}", clocks.cpu_6x4x(), clocks.cpu_3x2x(), clocks.cpu_2x(), clocks.cpu_1x());
 
+    // Flash: Linear Addressing Mode
     let mut flash = zynq::flash::Flash::new(200_000_000).linear_addressing_mode();
     let flash_ram: &[u8] = unsafe { core::slice::from_raw_parts(flash.ptr(), flash.size()) };
     for i in 0..=1 {
@@ -52,17 +37,20 @@ pub fn main_core0() {
     }
     let mut flash = flash.stop();
 
-    let mut ddr = zynq::ddr::DdrRam::new();
+    // Flash: Manual I/O Mode
-    #[cfg(not(feature = "target_zc706"))]
-    ddr.memtest();
-    ram::init_alloc(&mut ddr);
-
     for i in 0..=1 {
         let mut flash_io = flash.manual_mode(i);
-        // println!("rdcr={:02X}", flash_io.rdcr());
+
         print!("Flash {} ID:", i);
-        for b in flash_io.rdid() {
+        for (i, b) in flash_io.rdid().enumerate() {
             print!(" {:02X}", b);
+            if i % 0x10 == 0xf {
+                println!("");
+            } else if i % 8 == 7 {
+                print!("   ");
+            } else if i % 4 == 3 {
+                print!(" ");
+            }
         }
         println!("");
         print!("Flash {} I/O:", i);
@@ -85,138 +73,32 @@ pub fn main_core0() {
         flash_io.dump("ASP Read", 0x2B);
         flash_io.dump("Password Read", 0xE7);
 
+        for o in 0..8 {
+            const SIZE: u32 = 0x100;
             flash_io.write_enabled(|flash_io| {
-            flash_io.erase(0);
+                println!("Erase page {}", o);
+                flash_io.erase(o * SIZE);
             });
             flash_io.write_enabled(|flash_io| {
-            flash_io.program(0, [0x23054223; (0x100 >> 2)].iter().cloned());
+                println!("Program page {}", o);
+                flash_io.program(o * SIZE, [0x55FD02AA; (SIZE >> 2) as usize].iter().cloned());
             });
+        }
+
+        print!("Flash {} I/O:", i);
+        for o in 0..8 {
+            const CHUNK: u32 = 32;
+            for b in flash_io.read(CHUNK * o, CHUNK as usize) {
+                print!(" {:02X}", b);
+            }
+        }
+        println!("");
 
         flash = flash_io.stop();
     }
-
-    let core1_stack = unsafe { &mut STACK_CORE1[..] };
-    println!("{} bytes stack for core1", core1_stack.len());
-    let core1 = boot::Core1::start(core1_stack);
-
-    for _ in 0..0x1000000 {
-        let mut l = SHARED.lock();
-        *l += 1;
-    }
-    while !*DONE.lock() {
-        let x = { *SHARED.lock() };
-        println!("shared: {:08X}", x);
-    }
-    let x = { *SHARED.lock() };
-    println!("done shared: {:08X}", x);
-
-    core1.reset();
-
-    libcortex_a9::asm::dsb();
-    print!("Core1 stack [{:08X}..{:08X}]:", &core1.stack[0] as *const _ as u32, &core1.stack[core1.stack.len() - 1] as *const _ as u32);
-    for w in core1.stack {
-        print!(" {:08X}", w);
-    }
-    println!(".");
-
-    let eth = zynq::eth::Eth::default(HWADDR.clone());
-    println!("Eth on");
-
-    const RX_LEN: usize = 8;
-    let mut rx_descs = (0..RX_LEN)
-        .map(|_| zynq::eth::rx::DescEntry::zeroed())
-        .collect::<Vec<_>>();
-    let mut rx_buffers = vec![[0u8; zynq::eth::MTU]; RX_LEN];
-    // Number of transmission buffers (minimum is two because with
-    // one, duplicate packet transmission occurs)
-    const TX_LEN: usize = 8;
-    let mut tx_descs = (0..TX_LEN)
-        .map(|_| zynq::eth::tx::DescEntry::zeroed())
-        .collect::<Vec<_>>();
-    let mut tx_buffers = vec![[0u8; zynq::eth::MTU]; TX_LEN];
-    let eth = eth.start_rx(&mut rx_descs, &mut rx_buffers);
-    //let mut eth = eth.start_tx(&mut tx_descs, &mut tx_buffers);
-    let mut eth = eth.start_tx(
-        // HACK
-        unsafe { transmute(tx_descs.as_mut_slice()) },
-        unsafe { transmute(tx_buffers.as_mut_slice()) },
-    );
-
-    let ethernet_addr = EthernetAddress(HWADDR);
-    // IP stack
-    let local_addr = IpAddress::v4(192, 168, 1, 51);
-    let mut ip_addrs = [IpCidr::new(local_addr, 24)];
-    let mut neighbor_storage = vec![None; 256];
-    let neighbor_cache = NeighborCache::new(&mut neighbor_storage[..]);
-    let mut iface = EthernetInterfaceBuilder::new(&mut eth)
-        .ethernet_addr(ethernet_addr)
-        .ip_addrs(&mut ip_addrs[..])
-        .neighbor_cache(neighbor_cache)
-        .finalize();
-    let mut sockets_storage = [
-        None, None, None, None,
-        None, None, None, None
-    ];
-    let mut sockets = SocketSet::new(&mut sockets_storage[..]);
-
-    // taken from example code for smoltcp
-    let mut tcp_server_rx_data = vec![0; 512 * 1024];
-    let mut tcp_server_tx_data = vec![0; 512 * 1024];
-    let tcp_rx_buffer = TcpSocketBuffer::new(&mut tcp_server_rx_data[..]);
-    let tcp_tx_buffer = TcpSocketBuffer::new(&mut tcp_server_tx_data[..]);
-    let tcp_socket = TcpSocket::new(tcp_rx_buffer, tcp_tx_buffer);
-    let tcp_handle = sockets.add(tcp_socket);
-    /// `chargen`
-    const TCP_PORT: u16 = 19;
-
-    let mut time = 0u32;
-    loop {
-        time += 1;
-        let timestamp = Instant::from_millis(time);
-
-        match iface.poll(&mut sockets, timestamp) {
-            Ok(_) => {},
-            Err(e) => {
-                println!("poll error: {}", e);
-            }
-        }
-
-        // (mostly) taken from smoltcp example: TCP echo server
-        let mut socket = sockets.get::<TcpSocket>(tcp_handle);
-        if !socket.is_open() {
-            socket.listen(TCP_PORT).unwrap()
-        }
-        if socket.may_recv() && socket.can_send() {
-            socket.recv(|buf| {
-                let len = buf.len().min(4096);
-                let buffer = buf[..len].iter().cloned().collect::<Vec<_>>();
-                (len, buffer)
-            })
-                .and_then(|buffer| socket.send_slice(&buffer[..]))
-                .map(|_| {})
-                .unwrap_or_else(|e| println!("tcp: {:?}", e));
-
-        }
-    }
-
-    // #[allow(unreachable_code)]
-    // drop(tx_descs);
-    // #[allow(unreachable_code)]
-    // drop(tx_buffers);
 }
 
-static SHARED: Mutex<u32> = Mutex::new(0);
-static DONE: Mutex<bool> = Mutex::new(false);
-
 #[no_mangle]
 pub fn main_core1() {
-    println!("Hello from core1!");
-    for _ in 0..0x1000000 {
-        let mut l = SHARED.lock();
-        *l += 1;
-    }
-    println!("core1 done!");
-    *DONE.lock() = true;
-
     loop {}
 }

libboard_zynq/src/ddr/mod.rs

@@ -172,9 +172,14 @@ impl DdrRam {
         #[cfg(feature = "target_cora_z7_10")]
         let width = regs::DataBusWidth::Width16bit;
         self.regs.ddrc_ctrl.modify(|_, w| w
-            .soft_rstb(true)
+            .soft_rstb(false)
             .powerdown_en(false)
             .data_bus_width(width)
+            .burst8_refresh(1)
+            .rdwr_idle_gap(1)
+            .dis_rd_bypass(false)
+            .dis_act_bypass(false)
+            .dis_auto_refresh(false)
         );
 
         while self.status() == regs::ControllerStatus::Init {}

libboard_zynq/src/ddr/regs.rs

@@ -1,6 +1,6 @@
 use volatile_register::{RO, RW};
 
-use libregister::{register, register_bit, register_bits_typed};
+use libregister::{register, register_bit, register_bits, register_bits_typed};
 
 #[allow(unused)]
 #[repr(u8)]
@@ -169,7 +169,11 @@ register_bit!(ddrc_ctrl,
               soft_rstb, 0);
 register_bit!(ddrc_ctrl, powerdown_en, 1);
 register_bits_typed!(ddrc_ctrl, data_bus_width, u8, DataBusWidth, 2, 3);
-// (ddrc_ctrl) ...
+register_bits!(ddrc_ctrl, burst8_refresh, u8, 4, 6);
+register_bits!(ddrc_ctrl, rdwr_idle_gap, u8, 7, 13);
+register_bit!(ddrc_ctrl, dis_rd_bypass, 14);
+register_bit!(ddrc_ctrl, dis_act_bypass, 15);
+register_bit!(ddrc_ctrl, dis_auto_refresh, 16);
 
 // Controller operation mode status
 register!(mode_sts_reg,

libboard_zynq/src/flash/mod.rs

@@ -10,16 +10,21 @@ mod regs;
 mod bytes;
 pub use bytes::{BytesTransferExt, BytesTransfer};
 mod spi_flash_register;
-use spi_flash_register::*;
+pub use spi_flash_register::*;
 mod transfer;
 use transfer::Transfer;
 
-const FLASH_BAUD_RATE: u32 = 50_000_000;
+#[cfg(feature = "target_zc706")]
+const FLASH_BAUD_RATE: u32 = 10_000_000;
+#[cfg(feature = "target_cora_z7_10")]
+const FLASH_BAUD_RATE: u32 = 10_000_000;
 /// 16 MB
 pub const SINGLE_CAPACITY: u32 = 0x1000000;
 pub const SECTOR_SIZE: u32 = 0x10000;
 pub const PAGE_SIZE: u32 = 0x100;
 
+/// Write Register
+const INST_WRR: u8 = 0x01;
 /// Instruction: Read Identification
 const INST_RDID: u8 = 0x9F;
 const INST_READ: u8 = 0x03;
@@ -31,8 +36,10 @@ const INST_WREN: u8 = 0x06;
 const INST_PP: u8 = 0x02;
 /// Instruction: Erase 4K Block
 const INST_BE_4K: u8 = 0x20;
+/// Instruction: Clear Status Register
+const INST_CLSR: u8 = 0x30;
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum SpiWord {
     W8(u8),
     W16(u16),
@@ -105,9 +112,11 @@ impl<MODE> Flash<MODE> {
         );
     }
 
-    fn wait_tx_fifo_flush(&mut self) {
+    fn wait_tx_fifo_flush(&mut self) -> u32 {
         self.regs.config.modify(|_, w| w.man_start_com(true));
-        while !self.regs.intr_status.read().tx_fifo_not_full() {}
+        let mut waited = 0;
+        while !self.regs.intr_status.read().tx_fifo_not_full() { waited += 1; }
+        waited
     }
 }
 
@@ -220,6 +229,7 @@ impl Flash<()> {
 
             // Option: Add Feedback Output Clock
             // 7. Configure MIO pin 8 for feedback clock.
+            // #[cfg(not(feature = "target_zc706"))]
             slcr.mio_pin_08.write(
                 slcr::MioPin08::zeroed()
                     .l0_sel(true)
@@ -258,9 +268,12 @@ impl Flash<()> {
         while baud_rate_div < 7 && 2u32.pow(1 + baud_rate_div) < divider {
             baud_rate_div += 1;
         }
+        println!("delay: {:08X}", self.regs.delay.read());
 
         self.regs.config.write(regs::Config::zeroed()
             .baud_rate_div(baud_rate_div as u8)
+            .clk_ph(true)
+            .clk_pol(true)
             .mode_sel(true)
             .leg_flsh(true)
             .holdb_dr(true)
@@ -292,6 +305,7 @@ impl Flash<()> {
             .mode_en(true)
             // 2 devices
             .two_mem(true)
+            .sep_bus(true)
             .u_page(false)
             // Linear Addressing Mode
             .lq_mode(true)
@@ -324,6 +338,11 @@ impl Flash<()> {
             .lq_mode(false)
         );
 
+        self.regs.enable.write(
+            regs::Enable::zeroed()
+                .spi_en(true)
+        );
+
         self.transition()
     }
 }
@@ -349,14 +368,28 @@ impl Flash<LinearAddressing> {
 
 impl Flash<Manual> {
     pub fn stop(self) -> Flash<()> {
+        self.regs.enable.modify(|_, w| w.spi_en(false));
+
         self.transition()
     }
 
     pub fn read_reg<R: SpiFlashRegister>(&mut self) -> R {
         let args = Some(R::inst_code());
-        let transfer = self.transfer(args.into_iter(), 2)
+        let transfer = self.transfer(args.into_iter(), 3)
             .bytes_transfer();
-        R::new(transfer.skip(1).next().unwrap())
+        let b = transfer.skip(1).next().unwrap();
+        R::new(b)
+    }
+
+    pub fn write_regs(&mut self, sr1: SR1, cr: CR) {
+        self.write_enabled(|flash| {
+            let args = [
+                INST_WRR,
+                sr1.inner,
+                cr.inner,
+            ];
+            flash.transfer(args.iter().cloned(), 3);
+        });
     }
 
     pub fn read_reg_until<R, F, A>(&mut self, f: F) -> A
@@ -368,10 +401,10 @@ impl Flash<Manual> {
         while result.is_none() {
             let args = Some(R::inst_code());
             for b in self.transfer(args.into_iter(), 32)
-                .bytes_transfer().skip(1) {
+                .bytes_transfer().skip(5) {
                     result = f(R::new(b));
                     
-                    if result.is_none() {
+                    if result.is_some() {
                         break;
                     }
                 }
@@ -381,19 +414,22 @@ impl Flash<Manual> {
 
     /// Status Register-1 remains `0x00` immediately after invoking a command.
     fn wait_while_sr1_zeroed(&mut self) -> SR1 {
-        self.read_reg_until::<SR1, _, SR1>(|sr1|
+        println!("wait while sr1 0");
+        let sr1 = self.read_reg_until::<SR1, _, SR1>(|sr1|
             if sr1.is_zeroed() {
                 None
             } else {
                 Some(sr1)
             }
-        )
+        );
+        println!("sr1 non-zero: {:02X}", sr1.inner);
+        sr1
     }
 
     /// Read Identification
     pub fn rdid(&mut self) -> core::iter::Skip<BytesTransfer<Transfer<core::option::IntoIter<u32>, u32>>> {
         let args = Some((INST_RDID as u32) << 24);
-        self.transfer(args.into_iter(), 0x44)
+        self.transfer(args.into_iter(), 0x56)
             .bytes_transfer().skip(1)
     }
 
@@ -422,21 +458,23 @@ impl Flash<Manual> {
                 print!(".");
             }
             println!("");
-        } else {
-            println!("erased? sr1={:02X}", sr1.inner);
         }
+        println!("erased? sr1={:02X}", sr1.inner);
     }
 
     pub fn program<I: Iterator<Item=u32>>(&mut self, offset: u32, data: I) {
         {
             let len = 4 + 4 * data.size_hint().0;
+            // let args = Some(SpiWord::W8(INST_PP)).into_iter()
+            //     .chain(Some(SpiWord::W24(offset as u32)).into_iter())
+
             let args = Some(SpiWord::W32(((INST_PP as u32) << 24) | (offset as u32))).into_iter()
                 .chain(data.map(SpiWord::W32));
             self.transfer(args, len);
         }
 
-        // let sr1 = self.wait_while_sr1_zeroed();
+        let sr1 = self.wait_while_sr1_zeroed();
-        let sr1 = self.read_reg::<SR1>();
+        // let sr1 = self.read_reg::<SR1>();
 
         if sr1.e_err() {
             println!("E_ERR");
@@ -454,10 +492,13 @@ impl Flash<Manual> {
     }
 
     pub fn write_enabled<F: Fn(&mut Self) -> R, R>(&mut self, f: F) -> R {
+        let args = Some(INST_CLSR);
+        self.transfer(args.into_iter(), 1);
         // Write Enable
         let args = Some(INST_WREN);
         self.transfer(args.into_iter(), 1);
         self.regs.gpio.modify(|_, w| w.wp_n(true));
+        println!("WPn hi");
         let sr1 = self.wait_while_sr1_zeroed();
         if !sr1.wel() {
             panic!("Cannot write-enable flash");
@@ -468,6 +509,7 @@ impl Flash<Manual> {
         // Write Disable
         let args = Some(INST_WRDI);
         self.transfer(args.into_iter(), 1);
+        println!("WPn lo");
         self.regs.gpio.modify(|_, w| w.wp_n(false));
 
         result

libboard_zynq/src/flash/spi_flash_register.rs

@@ -35,6 +35,18 @@ macro_rules! u8_register {
 }
 
 u8_register!(CR, "Configuration Register", 0x35);
+impl CR {
+    /// quad I/O mode
+    pub fn quad(&self) -> bool {
+        self.inner.get_bit(1)
+    }
+
+    /// set quad I/O mode
+    pub fn set_quad(&mut self, value: bool) {
+        self.inner.set_bit(1, value);
+    }
+}
+
 u8_register!(SR1, "Status Register-1", 0x05);
 impl SR1 {
     /// Write In Progress

libboard_zynq/src/flash/transfer.rs

@@ -1,5 +1,4 @@
-use libregister::{RegisterR, RegisterW, RegisterRW};
+use libregister::{RegisterR, RegisterRW};
-use super::regs;
 use super::{SpiWord, Flash, Manual};
 
 pub struct Transfer<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> {
@@ -13,10 +12,6 @@ pub struct Transfer<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> {
 impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Transfer<'a, Args, W> {
     pub fn new(flash: &'a mut Flash<Manual>, args: Args, len: usize) -> Self {
         flash.regs.config.modify(|_, w| w.pcs(false));
-        flash.regs.enable.write(
-            regs::Enable::zeroed()
-                .spi_en(true)
-        );
 
         let mut xfer = Transfer {
             flash,
@@ -35,13 +30,15 @@ impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Transfer<'a, Args, W> {
             let arg = self.args.next()
                 .map(|n| n.into())
                 .unwrap_or(SpiWord::W32(0));
-            match arg {
+
+            // println!("w {:?}", arg);
+            let write_len = match arg {
                 SpiWord::W32(w) => {
                     // println!("txd0 {:08X}", w);
                     unsafe {
                         self.flash.regs.txd0.write(w);
                     }
-                    self.sent += 4;
+                    4
                 }
                 // Only txd0 can be used without flushing
                 _ => {
@@ -50,32 +47,38 @@ impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Transfer<'a, Args, W> {
                         self.flash.wait_tx_fifo_flush();
                     }
 
-                    match arg {
+                    let write_len = match arg {
                         SpiWord::W8(w) => {
                             // println!("txd1 {:02X}", w);
                             unsafe {
                                 self.flash.regs.txd1.write(u32::from(w) << 24);
                             }
-                            self.sent += 1;
+                            1
                         }
                         SpiWord::W16(w) => {
                             unsafe {
                                 self.flash.regs.txd2.write(u32::from(w) << 16);
                             }
-                            self.sent += 2;
+                            2
                         }
                         SpiWord::W24(w) => {
                             unsafe {
                                 self.flash.regs.txd3.write(w << 8);
                             }
-                            self.sent += 3;
+                            3
                         }
                         SpiWord::W32(_) => unreachable!(),
-                    }
+                    };
 
                     self.flash.wait_tx_fifo_flush();
+
+                    write_len
                 }
-            }
+            };
+            self.sent += write_len;
+            // if self.sent % 258 == 0 {
+            //     self.flash.wait_tx_fifo_flush();
+            // }
         }
     }
 
@@ -85,6 +88,7 @@ impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Transfer<'a, Args, W> {
 
     fn read(&mut self) -> u32 {
         let rx = self.flash.regs.rx_data.read();
+        // println!("r 0x{:02X}", rx);
         self.received += 4;
         rx
     }
@@ -97,15 +101,21 @@ impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Drop for Transfer<'a, Args,
             self.read();
         }
 
-        // Stop
+        // // Stop
-        self.flash.regs.enable.write(
+        // self.flash.regs.enable.write(
-            regs::Enable::zeroed()
+        //     regs::Enable::zeroed()
-                .spi_en(false)
+        //         .spi_en(false)
-        );
+        // );
+
         self.flash.regs.config.modify(|_, w| w
             .pcs(true)
             .man_start_com(false)
         );
+
+        // Leave PCS high for a few cycles
+        for _ in 0..0x100 {
+            libcortex_a9::asm::nop();
+        }
     }
 }
 
@@ -119,7 +129,10 @@ impl<'a, Args: Iterator<Item = W>, W: Into<SpiWord>> Iterator for Transfer<'a, A
 
         self.fill_tx_fifo();
 
+        // print!("read:");
         while !self.can_read() {}
-        Some(self.read())
+        let b = self.read();
+        // println!(" {:08X}", b);
+        Some(b)
     }
 }

libcortex_a9/src/regs.rs

@@ -8,7 +8,7 @@ macro_rules! def_reg_r {
         impl RegisterR for $name {
             type R = $type;
 
-            #[inline(always)]
+            #[inline]
             fn read(&self) -> Self::R {
                 let mut value: u32;
                 unsafe { asm!($asm_instr : "=r" (value) ::: "volatile") }
@@ -23,12 +23,13 @@ macro_rules! def_reg_w {
         impl RegisterW for $name {
             type W = $type;
 
-            #[inline(always)]
+            #[inline]
             fn write(&mut self, value: Self::W) {
                 let value: u32 = value.into();
                 unsafe { asm!($asm_instr :: "r" (value) :: "volatile") }
             }
 
+            #[inline]
             fn zeroed() -> Self::W {
                 0u32.into()
             }
@@ -43,6 +44,7 @@ macro_rules! wrap_reg {
                 pub inner: u32,
             }
             impl From<u32> for Read {
+                #[inline]
                 fn from(value: u32) -> Self {
                     Read { inner: value }
                 }
@@ -52,11 +54,13 @@ macro_rules! wrap_reg {
                 pub inner: u32,
             }
             impl From<u32> for Write {
+                #[inline]
                 fn from(value: u32) -> Self {
                     Write { inner: value }
                 }
             }
             impl Into<u32> for Write {
+                #[inline]
                 fn into(self) -> u32 {
                     self.inner
                 }
@@ -133,6 +137,7 @@ register_bit!(actlr, l1_prefetch_enable, 2);
 register_bit!(actlr, fw, 0);
 
 impl RegisterRW for ACTLR {
+    #[inline]
     fn modify<F: FnOnce(Self::R, Self::W) -> Self::W>(&mut self, f: F) {
         let r = self.read();
         let w = actlr::Write { inner: r.inner };

libregister/src/lib.rs

@@ -55,6 +55,7 @@ macro_rules! register_r {
         impl libregister::RegisterR for $struct_name {
             type R = $mod_name::Read;
 
+            #[inline]
             fn read(&self) -> Self::R {
                 let inner = self.inner.read();
                 $mod_name::Read { inner }
@@ -69,10 +70,12 @@ macro_rules! register_w {
         impl libregister::RegisterW for $struct_name {
             type W = $mod_name::Write;
 
+            #[inline]
             fn zeroed() -> $mod_name::Write {
                 $mod_name::Write { inner: 0 }
             }
 
+            #[inline]
             fn write(&mut self, w: Self::W) {
                 unsafe {
                     self.inner.write(w.inner);
@@ -86,6 +89,7 @@ macro_rules! register_w {
 macro_rules! register_rw {
     ($mod_name: ident, $struct_name: ident) => (
         impl libregister::RegisterRW for $struct_name {
+            #[inline]
             fn modify<F: FnOnce(Self::R, Self::W) -> Self::W>(&mut self, f: F) {
                 unsafe {
                     self.inner.modify(|inner| {
@@ -105,6 +109,7 @@ macro_rules! register_vcell {
         impl libregister::RegisterR for $struct_name {
             type R = $mod_name::Read;
 
+            #[inline]
             fn read(&self) -> Self::R {
                 let inner = self.inner.get();
                 $mod_name::Read { inner }
@@ -113,15 +118,18 @@ macro_rules! register_vcell {
         impl libregister::RegisterW for $struct_name {
             type W = $mod_name::Write;
 
+            #[inline]
             fn zeroed() -> $mod_name::Write {
                 $mod_name::Write { inner: 0 }
             }
 
+            #[inline]
             fn write(&mut self, w: Self::W) {
                 self.inner.set(w.inner);
             }
         }
         impl libregister::RegisterRW for $struct_name {
+            #[inline]
             fn modify<F: FnOnce(Self::R, Self::W) -> Self::W>(&mut self, f: F) {
                 let r = self.read();
                 let w = $mod_name::Write { inner: r.inner };
@@ -169,6 +177,7 @@ macro_rules! register_bit {
         $(#[$outer])*
         impl $mod_name::Read {
             #[allow(unused)]
+            #[inline]
             pub fn $name(&self) -> bool {
                 use bit_field::BitField;
 
@@ -179,6 +188,7 @@ macro_rules! register_bit {
         $(#[$outer])*
         impl $mod_name::Write {
             #[allow(unused)]
+            #[inline]
             pub fn $name(mut self, value: bool) -> Self {
                 use bit_field::BitField;
 
@@ -195,6 +205,7 @@ macro_rules! register_bits {
     ($mod_name: ident, $(#[$outer:meta])* $name: ident, $type: ty, $bit_begin: expr, $bit_end: expr) => (
         impl $mod_name::Read {
             #[allow(unused)]
+            #[inline]
             $(#[$outer])*
             pub fn $name(&self) -> $type {
                 use bit_field::BitField;
@@ -207,6 +218,7 @@ macro_rules! register_bits {
         $(#[$outer])*
         impl $mod_name::Write {
             #[allow(unused)]
+            #[inline]
             pub fn $name(mut self, value: $type) -> Self {
                 use bit_field::BitField;
 
@@ -226,6 +238,7 @@ macro_rules! register_bits_typed {
     ($mod_name: ident, $(#[$outer:meta])* $name: ident, $bit_type: ty, $type: ty, $bit_begin: expr, $bit_end: expr) => (
         impl $mod_name::Read {
             #[allow(unused)]
+            #[inline]
             $(#[$outer])*
             pub fn $name(&self) -> $type {
                 use bit_field::BitField;
@@ -237,6 +250,7 @@ macro_rules! register_bits_typed {
 
         impl $mod_name::Write {
             #[allow(unused)]
+            #[inline]
             $(#[$outer])*
             pub fn $name(mut self, value: $type) -> Self {
                 use bit_field::BitField;
@@ -254,6 +268,7 @@ macro_rules! register_at {
     ($name: ident, $addr: expr, $ctor: ident) => (
         impl $name {
             #[allow(unused)]
+            #[inline]
             pub fn $ctor() -> &'static mut Self {
                 let addr = $addr as *mut Self;
                 unsafe { &mut *addr }

link.x

@@ -21,17 +21,9 @@ MEMORY
 
 SECTIONS
 {
-    .exceptions ORIGIN(OCM) :
+    .text :
     {
         KEEP(*(.text.exceptions));
-    } > OCM
-
-    .__fill (NOLOAD) : {
-          . = ORIGIN(OCM) + 0x8000;
-    } > OCM
-
-    .text (ORIGIN(OCM) + 0x8000) :
-    {
         *(.text.boot);
         *(.text .text.*);
     } > OCM