Add Interrupt and timer support

api/C/include/csi.h

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+/*
+* Top-level definition file for RVM-CSI API.  Note: application writers do not include
+* this file: user rvm_csi.h instead.
+*/
+
+#ifndef CSI_H
+#define CSI_H
+
+#include "csi_interrupts.h"
+
+#endif /* CSI_H */

api/C/include/csi_bsp_csrs.h

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+/* PLACEHOLDER: replaced by content from BSP */

api/C/include/csi_bsp_defs.h

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+/* PLACEHOLDER: replaced by content from BSP */

api/C/include/csi_bsp_interrupts.h

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+/* PLACEHOLDER: replaced by content from BSP */
+
+#ifndef CSI_BSP_INTERRUPTS_H
+#define CSI_BSP_INTERRUPTS_H
+
+// Context structure for a timeout
+typedef struct {
+    int placeholder;
+} csi_timeout_t;
+
+#endif // CSI_BSP_INTERRUPTS_H

api/C/include/csi_bsp_perip.h

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+/* PLACEHOLDER: replaced by content from BSP */

api/C/include/csi_csrs.h

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+/* PLACEHOLDER: to be replaced by content auto-generated by Sail model */

api/C/include/csi_defs.h

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+/*
+ * General-Purpose Definitions for use in CSI code
+ *
+ * This file is included from rvm_csi.h prior to all other headers and contains
+ * general-purpose definitions which may be used by subsequent headers.
+ *
+ * Copyright (c) RISC-V International 2022. Creative Commons License. Auto-
+ * generated file: DO NOT EDIT
+ */
+
+#ifndef CSI_DEFS_H
+#define CSI_DEFS_H
+
+/*
+ * Return type for functions indicating status
+ */
+typedef enum {
+    CSI_SUCCESS = 0, /* Operation completed successfully */
+    CSI_NOT_IMPLEMENTED = -1, /* Functionality not implemented */
+    CSI_ERROR = -2, /* Generic error code */
+    CSI_NOT_INITIALIZED = -3, /* Sub-system not correctly initialised, operation failed. */
+    CSI_OUT_OF_MEM = -4, /* Out-of-memory error */
+} csi_status_t;
+
+/*
+ * Enumerates all sources in the system that can give rise to a trap event.  This
+ * enumeration should be treated as an integer which can have additional values
+ * beyond those enumerated here.  A standard set of interrupt and exception sources
+ * are enumerated here, which exclude external sources.  All external interrupt
+ * sources should be enumerated by the BSP within csi_bsp_interrupts.h; and their
+ * ennumerated values should follow on from CSI_NUM_STANDARD_TRAP_SOURCES.
+ * csi_bsp_interrupts.h must also define CSI_TOTAL_BSP_TRAP_SOURCES to indicate the
+ * total number of sources defined.  User applications may then use values above
+ * this to enumerate user-defined software signals.  Note that the actual
+ * enumerated values have no meaning beyond serving to uniquely identify the source
+ * of a trap event.  They are not intended to map onto values in the mcause
+ * register.
+ */
+typedef enum {
+    CSI_ENUM_NMI = 0, /* Non-maskable exception (hardware error) */
+    CSI_ENUM_MACHINE_SW_INTERRUPT, /* Machine mode software interrupt */
+    CSI_ENUM_MACHINE_TIMER_INTERRUPT, /* Machine mode timer interrupt */
+    CSI_ENUM_INSTRUCTION_ADDR_MISALIGNED_EXCEPTION, /* Instruction misaligned exception */
+    CSI_ENUM_INSTRUCTION_ACCESS_FAULT_EXCEPTION, /* Instruction access fault exception */
+    CSI_ENUM_ILLEGAL_INSTRUCTION_EXCEPTION, /* Illegal instruction exception */
+    CSI_ENUM_BREAKPOINT_EXCEPTION, /* Breakpoint exception */
+    CSI_ENUM_LOAD_ADDR_MISALIGNED_EXCEPTION, /* Load address misaligned exception */
+    CSI_ENUM_LOAD_ACCESS_FAULT_EXCEPTION, /* Load access fault exception */
+    CSI_ENUM_STORE_ADDR_MISALIGNED_EXCEPTION, /* Store address misaligned exception */
+    CSI_ENUM_STORE_ACCESS_FAULT_EXCEPTION, /* Store access fault exception */
+    CSI_ENUM_ECALL_FROM_UMODE, /* ECALL from User mode */
+    CSI_ENUM_ECALL_FROM_MMODE, /* ECALL from Machine mode */
+    CSI_ENUM_INST_PAGE_FAULT, /* Instruction page-fault */
+    CSI_ENUM_LOAD_PAGE_FAULT, /* Load page-fault */
+    CSI_ENUM_STORE_PAGE_FAULT, /* Store page-fault */
+    CSI_NUM_STANDARD_TRAP_SOURCES, /* Must come last in this list */
+} csi_trap_source_t;
+
+/*
+ * Interrupt enable bits in the mie CSR
+ */
+typedef enum {
+    CSI_SW_INTERRUPTS_ENABLE = 8, /* Software interrupts enable bit index */
+    CSI_TIMER_INTERRUPTS_ENABLE = 128, /* Timer interrupts enable bit index */
+    CSI_EXT_INTERRUPTS_ENABLE = 2048, /* External interrupts enable bit index */
+} csi_interrupt_enables_t;
+
+
+#endif /* CSI_DEFS_H */