Add CNTV_CVAL_EL0 register

Author: Javier-varez

src/registers.rs

@@ -12,6 +12,7 @@ mod cntp_ctl_el0;
 mod cntp_tval_el0;
 mod cntpct_el0;
 mod cntv_ctl_el0;
+mod cntv_cval_el0;
 mod cntv_tval_el0;
 mod cntvct_el0;
 mod cntvoff_el2;
@@ -60,6 +61,7 @@ pub use cntp_ctl_el0::CNTP_CTL_EL0;
 pub use cntp_tval_el0::CNTP_TVAL_EL0;
 pub use cntpct_el0::CNTPCT_EL0;
 pub use cntv_ctl_el0::CNTV_CTL_EL0;
+pub use cntv_cval_el0::CNTV_CVAL_EL0;
 pub use cntv_tval_el0::CNTV_TVAL_EL0;
 pub use cntvct_el0::CNTVCT_EL0;
 pub use cntvoff_el2::CNTVOFF_EL2;

src/registers/cntv_cval_el0.rs

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Copyright (c) 2018-2022 by the author(s)
+//
+// Author(s):
+//   - Andre Richter <andre.o.richter@gmail.com>
+//   - Javier Alvarez <javier.alvarez@allthingsembedded.net>
+
+//! Counter-timer Virtual Timer CompareValue register - EL0
+//!
+//! Holds the compare value for the virtual timer.
+//!
+//! When CNTV_CTL_EL0.ENABLE is 1, the timer condition is met when (CNTVCT_EL0 - CompareValue) is
+//! greater than or equal to zero. This means that CompareValue acts like a 64-bit upcounter timer.
+//!
+//! When the timer condition is met:
+//!   - CNTV_CTL_EL0.ISTATUS is set to 1.
+//!   - If CNTV_CTL_EL0.IMASK is 0, an interrupt is generated.
+//!
+//! When CNTV_CTL_EL0.ENABLE is 0, the timer condition is not met, but CNTVCT_EL0 continues to
+//! count.
+//!
+//! If the Generic counter is implemented at a size less than 64 bits, then this field is permitted
+//! to be implemented at the same width as the counter, and the upper bits are RES0.
+//!
+//! The value of this field is treated as zero-extended in all counter calculations.
+//!
+//! The reset behaviour of this field is:
+//!   - On a Warm reset, this field resets to an architecturally UNKNOWN value.
+
+use tock_registers::interfaces::{Readable, Writeable};
+
+pub struct Reg;
+
+impl Readable for Reg {
+    type T = u64;
+    type R = ();
+
+    sys_coproc_read_raw!(u64, "CNTV_CVAL_EL0", "x");
+}
+
+impl Writeable for Reg {
+    type T = u64;
+    type R = ();
+
+    sys_coproc_write_raw!(u64, "CNTV_CVAL_EL0", "x");
+}
+
+pub const CNTV_CVAL_EL0: Reg = Reg {};