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use simple RTIO now interface without pinning

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This commit is contained in:
Sebastien Bourdeauducq 2020-04-26 16:10:32 +08:00
parent 44b37aba7d
commit f562ff95c3
3 changed files with 23 additions and 5 deletions
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6
runtime/src/kernel.rs
View File

@ -6,7 +6,6 @@ use libcortex_a9::{mutex::Mutex, sync_channel::{self, sync_channel}};
use libsupport_zynq::boot::Core1;
use dyld;
use crate::pl::csr;
use crate::rtio;
@ -75,8 +74,9 @@ macro_rules! api {
fn resolve(required: &[u8]) -> Option<u32> {
let api = &[
/* proxified syscalls */
api!(now = csr::rtio::NOW_HI_ADDR as *const _),
api!(now_mu = rtio::now_mu),
api!(at_mu = rtio::at_mu),
api!(delay_mu = rtio::delay_mu),
api!(rtio_init = rtio::init),
api!(rtio_get_destination_status = rtio::get_destination_status),

20
runtime/src/rtio.rs
View File

@ -36,6 +36,24 @@ pub extern fn get_counter() -> i64 {
}
}
pub extern fn now_mu() -> i64 {
unsafe {
csr::rtio::now_read() as i64
}
}
pub extern fn at_mu(t: i64) {
unsafe {
csr::rtio::now_write(t as u64);
}
}
pub extern fn delay_mu(dt: i64) {
unsafe {
csr::rtio::now_write(csr::rtio::now_read() + dt as u64);
}
}
// writing the LSB of o_data (offset=0) triggers the RTIO write
#[inline(always)]
pub unsafe fn rtio_o_data_write(offset: usize, data: u32) {
@ -52,7 +70,7 @@ pub unsafe fn rtio_i_data_read(offset: usize) -> u32 {
#[inline(never)]
unsafe fn process_exceptional_status(channel: i32, status: u8) {
let timestamp = *(csr::rtio::NOW_HI_ADDR as *const i64);
let timestamp = csr::rtio::now_read() as i64;
if status & RTIO_O_STATUS_WAIT != 0 {
while csr::rtio::o_status_read() & RTIO_O_STATUS_WAIT != 0 {}
}

2
zc706.py
View File

@ -41,7 +41,7 @@ class ZC706(SoCCore):
self.submodules.rtio_tsc = rtio.TSC("async", glbl_fine_ts_width=3)
self.submodules.rtio_core = rtio.Core(self.rtio_tsc, rtio_channels)
self.csr_devices.append("rtio_core")
self.submodules.rtio = rtio.KernelInitiator(self.rtio_tsc)
self.submodules.rtio = rtio.KernelInitiator(self.rtio_tsc, now64=True)
self.csr_devices.append("rtio")
self.comb += self.rtio.cri.connect(self.rtio_core.cri)