feat: add stackpointer registers for EL2 and EL3

src/registers.rs

@@ -114,6 +114,8 @@ mod sctlr_el3;
 mod sp;
 mod sp_el0;
 mod sp_el1;
+mod sp_el2;
+mod sp_el3;
 mod spsel;
 mod spsr_el1;
 mod spsr_el2;
@@ -242,6 +244,8 @@ pub use sctlr_el3::SCTLR_EL3;
 pub use sp::SP;
 pub use sp_el0::SP_EL0;
 pub use sp_el1::SP_EL1;
+pub use sp_el2::SP_EL2;
+pub use sp_el3::SP_EL3;
 pub use spsel::SPSel;
 pub use spsr_el1::SPSR_EL1;
 pub use spsr_el2::SPSR_EL2;

src/registers/sp_el2.rs

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Copyright (c) 2018-2023 by the author(s)
+//
+// Author(s):
+//   - Fritz Stracke <[email protected]>
+
+//! The stack pointer - EL2
+//!
+//! Holds the stack pointer associated with EL2. When executing at EL2, the value of SPSel.SP
+//! determines the current stack pointer:
+//!
+//! SPSel.SP | current stack pointer
+//! --------------------------------
+//! 0        | SP_EL0
+//! 1        | SP_EL2
+
+use tock_registers::interfaces::{Readable, Writeable};
+
+pub struct Reg;
+
+impl Readable for Reg {
+    type T = u64;
+    type R = ();
+
+    sys_coproc_read_raw!(u64, "SP_EL2", "x");
+}
+
+impl Writeable for Reg {
+    type T = u64;
+    type R = ();
+
+    sys_coproc_write_raw!(u64, "SP_EL2", "x");
+}
+
+pub const SP_EL2: Reg = Reg {};

src/registers/sp_el3.rs

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Copyright (c) 2018-2023 by the author(s)
+//
+// Author(s):
+//   - Fritz Stracke <[email protected]>
+
+//! The stack pointer - EL3
+//!
+//! Holds the stack pointer associated with EL3. When executing at EL3, the value of SPSel.SP
+//! determines the current stack pointer:
+//!
+//! SPSel.SP | current stack pointer
+//! --------------------------------
+//! 0        | SP_EL0
+//! 1        | SP_EL3
+
+use tock_registers::interfaces::{Readable, Writeable};
+
+pub struct Reg;
+
+impl Readable for Reg {
+    type T = u64;
+    type R = ();
+
+    sys_coproc_read_raw!(u64, "SP_EL3", "x");
+}
+
+impl Writeable for Reg {
+    type T = u64;
+    type R = ();
+
+    sys_coproc_write_raw!(u64, "SP_EL3", "x");
+}
+
+pub const SP_EL3: Reg = Reg {};