Define the CCSIDR_EL1 register

Author: vbe0201

src/registers.rs

@@ -6,6 +6,7 @@
 #[macro_use]
 mod macros;
 
+mod ccsidr_el1;
 mod clidr_el1;
 mod cntfrq_el0;
 mod cnthctl_el2;
@@ -59,6 +60,7 @@ mod ttbr1_el1;
 mod vbar_el1;
 mod vbar_el2;
 
+pub use ccsidr_el1::{CCSIDR_EL1, CSSIDR_EL1_WITH_FEAT_CCIDX};
 pub use clidr_el1::CLIDR_EL1;
 pub use cntfrq_el0::CNTFRQ_EL0;
 pub use cnthctl_el2::CNTHCTL_EL2;

src/registers/ccsidr_el1.rs

@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Copyright (c) 2018-2022 by the author(s)
+//
+// Author(s):
+//   - Valentin B. <valentin.be@protonmail.com>
+
+//! Current Cache Size ID Register - EL1
+//!
+//! Provides information about the architecture of the currently selected cache.
+
+use tock_registers::{
+    interfaces::{Readable, Writeable},
+    register_bitfields,
+};
+
+register_bitfields! {u64,
+    /// The representation of `CCSIDR_EL1` when `FEAT_CCIDX` is implemented.
+    pub CCSIDR_EL1_WITH_FEAT_CCIDX [
+        /// Number of sets in cache.
+        ///
+        /// A value of 0 indicates 1 set in the cache. The number does not
+        /// necessarily have to be a power of 2.
+        NumSets OFFSET(32) NUMBITS(24) [],
+
+        /// Associativity of cache.
+        ///
+        /// A value of 0 indicates an associativity of 1. The value does not
+        /// necessarily have to be a power of 2.
+        Associativity OFFSET(3) NUMBITS(21) [],
+
+        /// Log2(Number of bytes in cache lline) - 4.
+        ///
+        /// **Examples:**
+        ///
+        /// - For a line length of 16 bytes: Log2(16) - 4 = 0. This is the minimum line length.
+        ///
+        /// - For a line length of 32 bytes: Log2(32) - 4 = 1.
+        LineSize OFFSET(0) NUMBITS(3) []
+    ],
+
+    /// The representation of `CCSIDR_EL1` otherwise.
+    pub CCSIDR_EL1 [
+        /// Number of sets in cache.
+        ///
+        /// A value of 0 indicates 1 set in the cache. The number does not
+        /// necessarily have to be a power of 2.
+        NumSets OFFSET(13) NUMBITS(15) [],
+
+        /// Associativity of cache.
+        ///
+        /// A value of 0 indicates an associativity of 1. The value does not
+        /// necessarily have to be a power of 2.
+        Associativity OFFSET(3) NUMBITS(10) [],
+
+        /// Log2(Number of bytes in cache lline) - 4.
+        ///
+        /// **Examples:**
+        ///
+        /// - For a line length of 16 bytes: Log2(16) - 4 = 0. This is the minimum line length.
+        ///
+        /// - For a line length of 32 bytes: Log2(32) - 4 = 1.
+        LineSize OFFSET(0) NUMBITS(3) []
+    ]
+}
+
+pub struct RegWithFeatCcidx;
+pub struct Reg;
+
+impl Readable for RegWithFeatCcidx {
+    type T = u64;
+    type R = CCSIDR_EL1_WITH_FEAT_CCIDX::Register;
+
+    sys_coproc_read_raw!(u64, "CCSIDR_EL1", "x");
+}
+
+impl Writeable for RegWithFeatCcidx {
+    type T = u64;
+    type R = CCSIDR_EL1_WITH_FEAT_CCIDX::Register;
+
+    sys_coproc_write_raw!(u64, "CCSIDR_EL1", "x");
+}
+
+impl Readable for Reg {
+    type T = u64;
+    type R = CCSIDR_EL1::Register;
+
+    sys_coproc_read_raw!(u64, "CCSIDR_EL1", "x");
+}
+
+impl Writeable for Reg {
+    type T = u64;
+    type R = CCSIDR_EL1::Register;
+
+    sys_coproc_write_raw!(u64, "CCSIDR_EL1", "x");
+}
+
+pub const CCSIDR_EL1_WITH_FEAT_CCIDX: RegWithFeatCcidx = RegWithFeatCcidx;
+pub const CCSIDR_EL1: Reg = Reg;

src/registers/csselr_el1.rs

@@ -5,9 +5,10 @@
 // Author(s):
 //   - Valentin B. <valentin.be@protonmail.com>
 
-//! Current Cache Size ID Register - EL1
+//! Cache Size Selection Register - EL1
 //!
-//! Provides information about the architecture of the currently selected cache.
+//! Selects the current Cache Size ID Register, CCSIDR_EL1, by specifying the
+//! required cache level and the cache type (either instruction or data cache).
 
 use tock_registers::{
     interfaces::{Readable, Writeable},