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kernel: split into {api,control,core1,rpc}

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This commit is contained in:
Astro 2020-07-08 22:32:45 +02:00
parent 68045ce0c5
commit b3d4590eec
7 changed files with 421 additions and 385 deletions
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2
src/runtime/src/eh_artiq.rs
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@ -213,7 +213,7 @@ pub unsafe extern fn raise(exception: *const Exception) -> ! {
INFLIGHT.backtrace_size += 1;
}
});
crate::kernel::terminate(INFLIGHT.exception.as_ref().unwrap(), INFLIGHT.backtrace[..INFLIGHT.backtrace_size].as_mut());
crate::kernel::core1::terminate(INFLIGHT.exception.as_ref().unwrap(), INFLIGHT.backtrace[..INFLIGHT.backtrace_size].as_mut());
}
pub unsafe extern fn reraise() -> ! {

384
src/runtime/src/kernel.rs
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@ -1,384 +0,0 @@
use core::{ptr, mem};
use log::{debug, info, error};
use alloc::{vec::Vec, sync::Arc, string::String};
use cslice::{CSlice, AsCSlice};
use libcortex_a9::{enable_fpu, cache::dcci_slice, mutex::Mutex, sync_channel::{self, sync_channel}};
use libsupport_zynq::boot::Core1;
use dyld;
use crate::eh_artiq;
use crate::rpc;
use crate::rtio;
#[derive(Debug)]
pub struct RPCException {
pub name: String,
pub message: String,
pub param: [i64; 3],
pub file: String,
pub line: i32,
pub column: i32,
pub function: String
}
#[derive(Debug)]
pub enum Message {
LoadRequest(Arc<Vec<u8>>),
LoadCompleted,
LoadFailed,
StartRequest,
KernelFinished,
KernelException(&'static eh_artiq::Exception<'static>, &'static [usize]),
RpcSend { is_async: bool, data: Arc<Vec<u8>> },
RpcRecvRequest(*mut ()),
RpcRecvReply(Result<usize, RPCException>),
}
static CHANNEL_0TO1: Mutex<Option<sync_channel::Receiver<Message>>> = Mutex::new(None);
static CHANNEL_1TO0: Mutex<Option<sync_channel::Sender<Message>>> = Mutex::new(None);
pub struct Control {
core1: Core1,
pub tx: sync_channel::Sender<Message>,
pub rx: sync_channel::Receiver<Message>,
}
impl Control {
pub fn start() -> Self {
let core1 = Core1::start(true);
let (core0_tx, core1_rx) = sync_channel(4);
let (core1_tx, core0_rx) = sync_channel(4);
*CHANNEL_0TO1.lock() = Some(core1_rx);
*CHANNEL_1TO0.lock() = Some(core1_tx);
Control {
core1,
tx: core0_tx,
rx: core0_rx,
}
}
pub fn restart(&mut self) {
*CHANNEL_0TO1.lock() = None;
*CHANNEL_1TO0.lock() = None;
self.core1.restart();
let (core0_tx, core1_rx) = sync_channel(4);
let (core1_tx, core0_rx) = sync_channel(4);
*CHANNEL_0TO1.lock() = Some(core1_rx);
*CHANNEL_1TO0.lock() = Some(core1_tx);
self.tx = core0_tx;
self.rx = core0_rx;
}
}
static mut KERNEL_CHANNEL_0TO1: *mut () = ptr::null_mut();
static mut KERNEL_CHANNEL_1TO0: *mut () = ptr::null_mut();
fn rpc_send_common(is_async: bool, service: u32, tag: &CSlice<u8>, data: *const *const ()) {
let core1_tx: &mut sync_channel::Sender<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_1TO0) };
let mut buffer = Vec::<u8>::new();
rpc::send_args(&mut buffer, service, tag.as_ref(), data).expect("RPC encoding failed");
core1_tx.send(Message::RpcSend { is_async: is_async, data: Arc::new(buffer) });
}
extern fn rpc_send(service: u32, tag: &CSlice<u8>, data: *const *const ()) {
rpc_send_common(false, service, tag, data);
}
extern fn rpc_send_async(service: u32, tag: &CSlice<u8>, data: *const *const ()) {
rpc_send_common(true, service, tag, data);
}
static mut KERNEL_LOAD_ADDR: usize = 0;
pub fn terminate(exception: &'static eh_artiq::Exception<'static>, backtrace: &'static mut [usize]) -> ! {
let load_addr = unsafe {
KERNEL_LOAD_ADDR
};
let mut cursor = 0;
// The address in the backtrace is relocated, so we have to convert it back to the address in
// the original python script, and remove those Rust function backtrace.
for i in 0..backtrace.len() {
if backtrace[i] >= load_addr {
backtrace[cursor] = backtrace[i] - load_addr;
cursor += 1;
}
}
let core1_tx: &mut sync_channel::Sender<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_1TO0) };
core1_tx.send(Message::KernelException(exception, &backtrace[..cursor]));
loop {}
}
unsafe fn attribute_writeback(typeinfo: *const ()) {
struct Attr {
offset: usize,
tag: CSlice<'static, u8>,
name: CSlice<'static, u8>
}
struct Type {
attributes: *const *const Attr,
objects: *const *const ()
}
let mut tys = typeinfo as *const *const Type;
while !(*tys).is_null() {
let ty = *tys;
tys = tys.offset(1);
let mut objects = (*ty).objects;
while !(*objects).is_null() {
let object = *objects;
objects = objects.offset(1);
let mut attributes = (*ty).attributes;
while !(*attributes).is_null() {
let attribute = *attributes;
attributes = attributes.offset(1);
if (*attribute).tag.len() > 0 {
rpc_send_async(0, &(*attribute).tag, [
&object as *const _ as *const (),
&(*attribute).name as *const _ as *const (),
(object as usize + (*attribute).offset) as *const ()
].as_ptr());
}
}
}
}
}
extern fn rpc_recv(slot: *mut ()) -> usize {
let core1_rx: &mut sync_channel::Receiver<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_0TO1) };
let core1_tx: &mut sync_channel::Sender<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_1TO0) };
core1_tx.send(Message::RpcRecvRequest(slot));
let reply = core1_rx.recv();
match *reply {
Message::RpcRecvReply(Ok(alloc_size)) => alloc_size,
Message::RpcRecvReply(Err(exception)) => unsafe {
eh_artiq::raise(&eh_artiq::Exception {
name: exception.name.as_bytes().as_c_slice(),
file: exception.file.as_bytes().as_c_slice(),
line: exception.line as u32,
column: exception.column as u32,
function: exception.function.as_bytes().as_c_slice(),
message: exception.message.as_bytes().as_c_slice(),
param: exception.param
})
},
_ => panic!("received unexpected reply to RpcRecvRequest: {:?}", reply)
}
}
macro_rules! api {
($i:ident) => ({
extern { static $i: u8; }
unsafe { api!($i = &$i as *const _) }
});
($i:ident, $d:item) => ({
$d
api!($i = $i)
});
($i:ident = $e:expr) => {
(stringify!($i), $e as *const ())
}
}
fn resolve(required: &[u8]) -> Option<u32> {
let api = &[
// timing
api!(now_mu = rtio::now_mu),
api!(at_mu = rtio::at_mu),
api!(delay_mu = rtio::delay_mu),
// rpc
api!(rpc_send = rpc_send),
api!(rpc_send_async = rpc_send_async),
api!(rpc_recv = rpc_recv),
// rtio
api!(rtio_init = rtio::init),
api!(rtio_get_destination_status = rtio::get_destination_status),
api!(rtio_get_counter = rtio::get_counter),
api!(rtio_output = rtio::output),
api!(rtio_output_wide = rtio::output_wide),
api!(rtio_input_timestamp = rtio::input_timestamp),
api!(rtio_input_data = rtio::input_data),
api!(rtio_input_timestamped_data = rtio::input_timestamped_data),
// Double-precision floating-point arithmetic helper functions
// RTABI chapter 4.1.2, Table 2
api!(__aeabi_dadd),
api!(__aeabi_ddiv),
api!(__aeabi_dmul),
api!(__aeabi_dsub),
// Double-precision floating-point comparison helper functions
// RTABI chapter 4.1.2, Table 3
api!(__aeabi_dcmpeq),
api!(__aeabi_dcmpeq),
api!(__aeabi_dcmplt),
api!(__aeabi_dcmple),
api!(__aeabi_dcmpge),
api!(__aeabi_dcmpgt),
api!(__aeabi_dcmpun),
// Single-precision floating-point arithmetic helper functions
// RTABI chapter 4.1.2, Table 4
api!(__aeabi_fadd),
api!(__aeabi_fdiv),
api!(__aeabi_fmul),
api!(__aeabi_fsub),
// Single-precision floating-point comparison helper functions
// RTABI chapter 4.1.2, Table 5
api!(__aeabi_fcmpeq),
api!(__aeabi_fcmpeq),
api!(__aeabi_fcmplt),
api!(__aeabi_fcmple),
api!(__aeabi_fcmpge),
api!(__aeabi_fcmpgt),
api!(__aeabi_fcmpun),
// Floating-point to integer conversions.
// RTABI chapter 4.1.2, Table 6
api!(__aeabi_d2iz),
api!(__aeabi_d2uiz),
api!(__aeabi_d2lz),
api!(__aeabi_d2ulz),
api!(__aeabi_f2iz),
api!(__aeabi_f2uiz),
api!(__aeabi_f2lz),
api!(__aeabi_f2ulz),
// Conversions between floating types.
// RTABI chapter 4.1.2, Table 7
api!(__aeabi_f2d),
// Integer to floating-point conversions.
// RTABI chapter 4.1.2, Table 8
api!(__aeabi_i2d),
api!(__aeabi_ui2d),
api!(__aeabi_l2d),
api!(__aeabi_ul2d),
api!(__aeabi_i2f),
api!(__aeabi_ui2f),
api!(__aeabi_l2f),
api!(__aeabi_ul2f),
// Long long helper functions
// RTABI chapter 4.2, Table 9
api!(__aeabi_lmul),
api!(__aeabi_llsl),
api!(__aeabi_llsr),
api!(__aeabi_lasr),
// Integer division functions
// RTABI chapter 4.3.1
api!(__aeabi_idiv),
api!(__aeabi_ldivmod),
api!(__aeabi_uidiv),
api!(__aeabi_uldivmod),
// 4.3.4 Memory copying, clearing, and setting
api!(__aeabi_memcpy8),
api!(__aeabi_memcpy4),
api!(__aeabi_memcpy),
api!(__aeabi_memmove8),
api!(__aeabi_memmove4),
api!(__aeabi_memmove),
api!(__aeabi_memset8),
api!(__aeabi_memset4),
api!(__aeabi_memset),
api!(__aeabi_memclr8),
api!(__aeabi_memclr4),
api!(__aeabi_memclr),
// libc
api!(memcmp, extern { fn memcmp(a: *const u8, b: *mut u8, size: usize); }),
// exceptions
api!(_Unwind_Resume = unwind::_Unwind_Resume),
api!(__artiq_personality = eh_artiq::artiq_personality),
api!(__artiq_raise = eh_artiq::raise),
api!(__artiq_reraise = eh_artiq::reraise),
];
api.iter()
.find(|&&(exported, _)| exported.as_bytes() == required)
.map(|&(_, ptr)| ptr as u32)
}
#[no_mangle]
pub fn main_core1() {
debug!("Core1 started");
enable_fpu();
debug!("FPU enabled on Core1");
let mut core1_tx = None;
while core1_tx.is_none() {
core1_tx = CHANNEL_1TO0.lock().take();
}
let mut core1_tx = core1_tx.unwrap();
let mut core1_rx = None;
while core1_rx.is_none() {
core1_rx = CHANNEL_0TO1.lock().take();
}
let mut core1_rx = core1_rx.unwrap();
let mut current_modinit: Option<u32> = None;
let mut current_typeinfo: Option<u32> = None;
let mut library_handle: Option<dyld::Library> = None;
loop {
let message = core1_rx.recv();
match *message {
Message::LoadRequest(data) => {
match dyld::load(&data, &resolve) {
Ok(library) => {
unsafe {
KERNEL_LOAD_ADDR = library.image.as_ptr() as usize;
}
let bss_start = library.lookup(b"__bss_start");
let end = library.lookup(b"_end");
if let Some(bss_start) = bss_start {
let end = end.unwrap();
unsafe {
ptr::write_bytes(bss_start as *mut u8, 0, (end - bss_start) as usize);
}
}
let __modinit__ = library.lookup(b"__modinit__").unwrap();
current_modinit = Some(__modinit__);
current_typeinfo = library.lookup(b"typeinfo");
debug!("kernel loaded");
// Flush data cache entries for the image in DDR, including
// Memory/Instruction Symchronization Barriers
dcci_slice(library.image.data);
core1_tx.send(Message::LoadCompleted);
library_handle = Some(library);
},
Err(error) => {
error!("failed to load shared library: {}", error);
core1_tx.send(Message::LoadFailed);
}
}
},
Message::StartRequest => {
info!("kernel starting");
if let Some(__modinit__) = current_modinit {
unsafe {
KERNEL_CHANNEL_0TO1 = mem::transmute(&mut core1_rx);
KERNEL_CHANNEL_1TO0 = mem::transmute(&mut core1_tx);
(mem::transmute::<u32, fn()>(__modinit__))();
if let Some(typeinfo) = current_typeinfo {
attribute_writeback(typeinfo as *const ());
}
KERNEL_CHANNEL_0TO1 = ptr::null_mut();
KERNEL_CHANNEL_1TO0 = ptr::null_mut();
}
}
library_handle = None;
info!("kernel finished");
core1_tx.send(Message::KernelFinished);
}
_ => error!("Core1 received unexpected message: {:?}", message),
}
}
}

131
src/runtime/src/kernel/api.rs Normal file
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@ -0,0 +1,131 @@
use crate::eh_artiq;
use crate::rtio;
use super::rpc::{rpc_send, rpc_send_async, rpc_recv};
macro_rules! api {
($i:ident) => ({
extern { static $i: u8; }
unsafe { api!($i = &$i as *const _) }
});
($i:ident, $d:item) => ({
$d
api!($i = $i)
});
($i:ident = $e:expr) => {
(stringify!($i), $e as *const ())
}
}
pub fn resolve(required: &[u8]) -> Option<u32> {
let api = &[
// timing
api!(now_mu = rtio::now_mu),
api!(at_mu = rtio::at_mu),
api!(delay_mu = rtio::delay_mu),
// rpc
api!(rpc_send = rpc_send),
api!(rpc_send_async = rpc_send_async),
api!(rpc_recv = rpc_recv),
// rtio
api!(rtio_init = rtio::init),
api!(rtio_get_destination_status = rtio::get_destination_status),
api!(rtio_get_counter = rtio::get_counter),
api!(rtio_output = rtio::output),
api!(rtio_output_wide = rtio::output_wide),
api!(rtio_input_timestamp = rtio::input_timestamp),
api!(rtio_input_data = rtio::input_data),
api!(rtio_input_timestamped_data = rtio::input_timestamped_data),
// Double-precision floating-point arithmetic helper functions
// RTABI chapter 4.1.2, Table 2
api!(__aeabi_dadd),
api!(__aeabi_ddiv),
api!(__aeabi_dmul),
api!(__aeabi_dsub),
// Double-precision floating-point comparison helper functions
// RTABI chapter 4.1.2, Table 3
api!(__aeabi_dcmpeq),
api!(__aeabi_dcmpeq),
api!(__aeabi_dcmplt),
api!(__aeabi_dcmple),
api!(__aeabi_dcmpge),
api!(__aeabi_dcmpgt),
api!(__aeabi_dcmpun),
// Single-precision floating-point arithmetic helper functions
// RTABI chapter 4.1.2, Table 4
api!(__aeabi_fadd),
api!(__aeabi_fdiv),
api!(__aeabi_fmul),
api!(__aeabi_fsub),
// Single-precision floating-point comparison helper functions
// RTABI chapter 4.1.2, Table 5
api!(__aeabi_fcmpeq),
api!(__aeabi_fcmpeq),
api!(__aeabi_fcmplt),
api!(__aeabi_fcmple),
api!(__aeabi_fcmpge),
api!(__aeabi_fcmpgt),
api!(__aeabi_fcmpun),
// Floating-point to integer conversions.
// RTABI chapter 4.1.2, Table 6
api!(__aeabi_d2iz),
api!(__aeabi_d2uiz),
api!(__aeabi_d2lz),
api!(__aeabi_d2ulz),
api!(__aeabi_f2iz),
api!(__aeabi_f2uiz),
api!(__aeabi_f2lz),
api!(__aeabi_f2ulz),
// Conversions between floating types.
// RTABI chapter 4.1.2, Table 7
api!(__aeabi_f2d),
// Integer to floating-point conversions.
// RTABI chapter 4.1.2, Table 8
api!(__aeabi_i2d),
api!(__aeabi_ui2d),
api!(__aeabi_l2d),
api!(__aeabi_ul2d),
api!(__aeabi_i2f),
api!(__aeabi_ui2f),
api!(__aeabi_l2f),
api!(__aeabi_ul2f),
// Long long helper functions
// RTABI chapter 4.2, Table 9
api!(__aeabi_lmul),
api!(__aeabi_llsl),
api!(__aeabi_llsr),
api!(__aeabi_lasr),
// Integer division functions
// RTABI chapter 4.3.1
api!(__aeabi_idiv),
api!(__aeabi_ldivmod),
api!(__aeabi_uidiv),
api!(__aeabi_uldivmod),
// 4.3.4 Memory copying, clearing, and setting
api!(__aeabi_memcpy8),
api!(__aeabi_memcpy4),
api!(__aeabi_memcpy),
api!(__aeabi_memmove8),
api!(__aeabi_memmove4),
api!(__aeabi_memmove),
api!(__aeabi_memset8),
api!(__aeabi_memset4),
api!(__aeabi_memset),
api!(__aeabi_memclr8),
api!(__aeabi_memclr4),
api!(__aeabi_memclr),
// libc
api!(memcmp, extern { fn memcmp(a: *const u8, b: *mut u8, size: usize); }),
// exceptions
api!(_Unwind_Resume = unwind::_Unwind_Resume),
api!(__artiq_personality = eh_artiq::artiq_personality),
api!(__artiq_raise = eh_artiq::raise),
api!(__artiq_reraise = eh_artiq::reraise),
];
api.iter()
.find(|&&(exported, _)| exported.as_bytes() == required)
.map(|&(_, ptr)| ptr as u32)
}

41
src/runtime/src/kernel/control.rs Normal file
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@ -0,0 +1,41 @@
use libcortex_a9::sync_channel::{self, sync_channel};
use libsupport_zynq::boot::Core1;
use super::{CHANNEL_0TO1, CHANNEL_1TO0, Message};
pub struct Control {
core1: Core1,
pub tx: sync_channel::Sender<Message>,
pub rx: sync_channel::Receiver<Message>,
}
impl Control {
pub fn start() -> Self {
let core1 = Core1::start(true);
let (core0_tx, core1_rx) = sync_channel(4);
let (core1_tx, core0_rx) = sync_channel(4);
*CHANNEL_0TO1.lock() = Some(core1_rx);
*CHANNEL_1TO0.lock() = Some(core1_tx);
Control {
core1,
tx: core0_tx,
rx: core0_rx,
}
}
pub fn restart(&mut self) {
*CHANNEL_0TO1.lock() = None;
*CHANNEL_1TO0.lock() = None;
self.core1.restart();
let (core0_tx, core1_rx) = sync_channel(4);
let (core1_tx, core0_rx) = sync_channel(4);
*CHANNEL_0TO1.lock() = Some(core1_rx);
*CHANNEL_1TO0.lock() = Some(core1_tx);
self.tx = core0_tx;
self.rx = core0_rx;
}
}

157
src/runtime/src/kernel/core1.rs Normal file
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@ -0,0 +1,157 @@
//! Kernel prologue/epilogue that runs on the 2nd CPU core
use core::{ptr, mem};
use log::{debug, info, error};
use cslice::CSlice;
use libcortex_a9::{enable_fpu, cache::dcci_slice, sync_channel};
use dyld;
use crate::eh_artiq;
use super::{
api::resolve,
rpc::rpc_send_async,
CHANNEL_0TO1, CHANNEL_1TO0,
KERNEL_CHANNEL_0TO1, KERNEL_CHANNEL_1TO0,
Message,
};
/// will contain the kernel image address on the heap
static mut KERNEL_LOAD_ADDR: usize = 0;
unsafe fn attribute_writeback(typeinfo: *const ()) {
struct Attr {
offset: usize,
tag: CSlice<'static, u8>,
name: CSlice<'static, u8>
}
struct Type {
attributes: *const *const Attr,
objects: *const *const ()
}
let mut tys = typeinfo as *const *const Type;
while !(*tys).is_null() {
let ty = *tys;
tys = tys.offset(1);
let mut objects = (*ty).objects;
while !(*objects).is_null() {
let object = *objects;
objects = objects.offset(1);
let mut attributes = (*ty).attributes;
while !(*attributes).is_null() {
let attribute = *attributes;
attributes = attributes.offset(1);
if (*attribute).tag.len() > 0 {
rpc_send_async(0, &(*attribute).tag, [
&object as *const _ as *const (),
&(*attribute).name as *const _ as *const (),
(object as usize + (*attribute).offset) as *const ()
].as_ptr());
}
}
}
}
}
#[no_mangle]
pub fn main_core1() {
debug!("Core1 started");
enable_fpu();
debug!("FPU enabled on Core1");
let mut core1_tx = None;
while core1_tx.is_none() {
core1_tx = CHANNEL_1TO0.lock().take();
}
let mut core1_tx = core1_tx.unwrap();
let mut core1_rx = None;
while core1_rx.is_none() {
core1_rx = CHANNEL_0TO1.lock().take();
}
let mut core1_rx = core1_rx.unwrap();
let mut current_modinit: Option<u32> = None;
let mut current_typeinfo: Option<u32> = None;
let mut library_handle: Option<dyld::Library> = None;
loop {
let message = core1_rx.recv();
match *message {
Message::LoadRequest(data) => {
match dyld::load(&data, &resolve) {
Ok(library) => {
unsafe {
KERNEL_LOAD_ADDR = library.image.as_ptr() as usize;
}
let bss_start = library.lookup(b"__bss_start");
let end = library.lookup(b"_end");
if let Some(bss_start) = bss_start {
let end = end.unwrap();
unsafe {
ptr::write_bytes(bss_start as *mut u8, 0, (end - bss_start) as usize);
}
}
let __modinit__ = library.lookup(b"__modinit__").unwrap();
current_modinit = Some(__modinit__);
current_typeinfo = library.lookup(b"typeinfo");
debug!("kernel loaded");
// Flush data cache entries for the image in DDR, including
// Memory/Instruction Symchronization Barriers
dcci_slice(library.image.data);
core1_tx.send(Message::LoadCompleted);
library_handle = Some(library);
},
Err(error) => {
error!("failed to load shared library: {}", error);
core1_tx.send(Message::LoadFailed);
}
}
},
Message::StartRequest => {
info!("kernel starting");
if let Some(__modinit__) = current_modinit {
unsafe {
KERNEL_CHANNEL_0TO1 = mem::transmute(&mut core1_rx);
KERNEL_CHANNEL_1TO0 = mem::transmute(&mut core1_tx);
(mem::transmute::<u32, fn()>(__modinit__))();
if let Some(typeinfo) = current_typeinfo {
attribute_writeback(typeinfo as *const ());
}
KERNEL_CHANNEL_0TO1 = ptr::null_mut();
KERNEL_CHANNEL_1TO0 = ptr::null_mut();
}
}
library_handle = None;
info!("kernel finished");
core1_tx.send(Message::KernelFinished);
}
_ => error!("Core1 received unexpected message: {:?}", message),
}
}
}
/// Called by eh_artiq
pub fn terminate(exception: &'static eh_artiq::Exception<'static>, backtrace: &'static mut [usize]) -> ! {
let load_addr = unsafe {
KERNEL_LOAD_ADDR
};
let mut cursor = 0;
// The address in the backtrace is relocated, so we have to convert it back to the address in
// the original python script, and remove those Rust function backtrace.
for i in 0..backtrace.len() {
if backtrace[i] >= load_addr {
backtrace[cursor] = backtrace[i] - load_addr;
cursor += 1;
}
}
let core1_tx: &mut sync_channel::Sender<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_1TO0) };
core1_tx.send(Message::KernelException(exception, &backtrace[..cursor]));
loop {}
}

41
src/runtime/src/kernel/mod.rs Normal file
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use core::ptr;
use alloc::{vec::Vec, sync::Arc, string::String};
use libcortex_a9::{mutex::Mutex, sync_channel};
use crate::eh_artiq;
mod control;
pub use control::Control;
pub mod core1;
mod api;
mod rpc;
#[derive(Debug)]
pub struct RPCException {
pub name: String,
pub message: String,
pub param: [i64; 3],
pub file: String,
pub line: i32,
pub column: i32,
pub function: String
}
#[derive(Debug)]
pub enum Message {
LoadRequest(Arc<Vec<u8>>),
LoadCompleted,
LoadFailed,
StartRequest,
KernelFinished,
KernelException(&'static eh_artiq::Exception<'static>, &'static [usize]),
RpcSend { is_async: bool, data: Arc<Vec<u8>> },
RpcRecvRequest(*mut ()),
RpcRecvReply(Result<usize, RPCException>),
}
static CHANNEL_0TO1: Mutex<Option<sync_channel::Receiver<Message>>> = Mutex::new(None);
static CHANNEL_1TO0: Mutex<Option<sync_channel::Sender<Message>>> = Mutex::new(None);
static mut KERNEL_CHANNEL_0TO1: *mut () = ptr::null_mut();
static mut KERNEL_CHANNEL_1TO0: *mut () = ptr::null_mut();

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src/runtime/src/kernel/rpc.rs Normal file
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//! Kernel-side RPC API
use core::mem;
use alloc::{vec::Vec, sync::Arc};
use cslice::{CSlice, AsCSlice};
use libcortex_a9::sync_channel;
use crate::eh_artiq;
use crate::rpc::send_args;
use super::{
KERNEL_CHANNEL_0TO1, KERNEL_CHANNEL_1TO0,
Message,
};
fn rpc_send_common(is_async: bool, service: u32, tag: &CSlice<u8>, data: *const *const ()) {
let core1_tx: &mut sync_channel::Sender<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_1TO0) };
let mut buffer = Vec::<u8>::new();
send_args(&mut buffer, service, tag.as_ref(), data).expect("RPC encoding failed");
core1_tx.send(Message::RpcSend { is_async: is_async, data: Arc::new(buffer) });
}
pub extern fn rpc_send(service: u32, tag: &CSlice<u8>, data: *const *const ()) {
rpc_send_common(false, service, tag, data);
}
pub extern fn rpc_send_async(service: u32, tag: &CSlice<u8>, data: *const *const ()) {
rpc_send_common(true, service, tag, data);
}
pub extern fn rpc_recv(slot: *mut ()) -> usize {
let core1_rx: &mut sync_channel::Receiver<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_0TO1) };
let core1_tx: &mut sync_channel::Sender<Message> = unsafe { mem::transmute(KERNEL_CHANNEL_1TO0) };
core1_tx.send(Message::RpcRecvRequest(slot));
let reply = core1_rx.recv();
match *reply {
Message::RpcRecvReply(Ok(alloc_size)) => alloc_size,
Message::RpcRecvReply(Err(exception)) => unsafe {
eh_artiq::raise(&eh_artiq::Exception {
name: exception.name.as_bytes().as_c_slice(),
file: exception.file.as_bytes().as_c_slice(),
line: exception.line as u32,
column: exception.column as u32,
function: exception.function.as_bytes().as_c_slice(),
message: exception.message.as_bytes().as_c_slice(),
param: exception.param
})
},
_ => panic!("received unexpected reply to RpcRecvRequest: {:?}", reply)
}
}