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slave_fpga: modularize

This commit is contained in:
Sebastien Bourdeauducq 2019-10-31 11:50:53 +08:00
parent 9a35a2ed81
commit 389a8f587a
1 changed files with 33 additions and 16 deletions
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49
artiq/firmware/libboard_artiq/slave_fpga.rs
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@ -24,21 +24,7 @@ unsafe fn shift_u8(data: u8) {
} }
} }
pub fn load() -> Result<(), &'static str> { pub fn prepare() -> Result<(), &'static str> {
info!("Loading slave FPGA gateware...");
let header = unsafe { slice::from_raw_parts(GATEWARE, 8) };
let magic = BigEndian::read_u32(&header[0..]);
let length = BigEndian::read_u32(&header[4..]) as usize;
info!(" magic: 0x{:08x}, length: 0x{:08x}", magic, length);
if magic != 0x5352544d { // "SRTM", see sayma_rtm target as well
return Err("Bad magic");
}
if length > 0x220000 {
return Err("Too large (corrupted?)");
}
unsafe { unsafe {
if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 { if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 {
info!(" DONE before loading"); info!(" DONE before loading");
@ -61,14 +47,24 @@ pub fn load() -> Result<(), &'static str> {
if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 { if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 {
return Err("DONE high despite PROGRAM"); return Err("DONE high despite PROGRAM");
} }
}
Ok(())
}
for i in slice::from_raw_parts(GATEWARE.offset(8), length) { pub fn input(data: &[u8]) -> Result<(), &'static str> {
unsafe {
for i in data {
shift_u8(*i); shift_u8(*i);
if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 { if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 {
return Err("INIT asserted during load"); return Err("INIT asserted during load");
} }
} }
}
Ok(())
}
pub fn complete() -> Result<(), &'static str> {
unsafe {
let t = clock::get_ms(); let t = clock::get_ms();
while csr::slave_fpga_cfg::in_read() & DONE_BIT == 0 { while csr::slave_fpga_cfg::in_read() & DONE_BIT == 0 {
if clock::get_ms() > t + 100 { if clock::get_ms() > t + 100 {
@ -80,6 +76,27 @@ pub fn load() -> Result<(), &'static str> {
csr::slave_fpga_cfg::out_write(PROGRAM_B_BIT); csr::slave_fpga_cfg::out_write(PROGRAM_B_BIT);
csr::slave_fpga_cfg::oe_write(PROGRAM_B_BIT); csr::slave_fpga_cfg::oe_write(PROGRAM_B_BIT);
} }
Ok(())
}
pub fn load() -> Result<(), &'static str> {
info!("Loading slave FPGA gateware...");
let header = unsafe { slice::from_raw_parts(GATEWARE, 8) };
let magic = BigEndian::read_u32(&header[0..]);
let length = BigEndian::read_u32(&header[4..]) as usize;
info!(" magic: 0x{:08x}, length: 0x{:08x}", magic, length);
if magic != 0x5352544d { // "SRTM", see sayma_rtm target as well
return Err("Bad magic");
}
if length > 0x220000 {
return Err("Too large (corrupted?)");
}
prepare()?;
input(unsafe { slice::from_raw_parts(GATEWARE.offset(8), length) })?;
complete()?;
info!(" ...done"); info!(" ...done");
Ok(()) Ok(())