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// SPDX-License-Identifier: GPL-2.0
//! Support for firmware binaries designed to run on a RISC-V core. Such firmwares files have a
//! dedicated header.
use kernel::{
device,
dma::Coherent,
firmware::Firmware,
prelude::*, //
};
use crate::firmware::tlv::Tlv;
/// A parsed firmware for a RISC-V core, ready to be loaded and run.
pub(crate) struct RiscvFirmware<'a> {
/// Offset at which the code starts in the firmware image.
pub(crate) code_offset: u32,
/// Offset at which the data starts in the firmware image.
pub(crate) data_offset: u32,
/// Offset at which the manifest starts in the firmware image.
pub(crate) manifest_offset: u32,
/// Application version.
pub(crate) app_version: u32,
/// Device-mapped firmware image.
pub(crate) ucode: Coherent<'a, [u8]>,
}
impl<'a> RiscvFirmware<'a> {
/// Parses the RISC-V firmware image contained in `fw`.
pub(crate) fn new(dev: &'a device::Device<device::Bound>, fw: &Firmware) -> Result<Self> {
let tlv = Tlv::new(fw.data())?;
dev_dbg!(
dev,
"loaded gsp bootloader firmware v{}\n",
tlv.get_string(b"VERS")?
);
let code_offset = tlv.get_u32(b"CDOF")?;
let data_offset = tlv.get_u32(b"DAOF")?;
let manifest_offset = tlv.get_u32(b"MFOF")?;
let app_version = tlv.get_u32(b"APPV")?;
let ucode = Coherent::from_slice(dev, tlv.get_bytes(b"BLOB")?, GFP_KERNEL)?;
Ok(Self {
ucode,
code_offset,
data_offset,
manifest_offset,
app_version,
})
}
}
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