feat: add lab-rv32i-c-interrupts card

2026-07-21 19:14:20 +02:00
commit 8820c2a22e
23 changed files with 4433 additions and 0 deletions
@@ -0,0 +1,61 @@
+#ifndef C10_COMMON_H
+#define C10_COMMON_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "hazard3_csr.h"
+#include "tb_cxxrtl_io.h"
+
+#define MSTATUS_MIE UINT32_C(0x00000008)
+#define MIE_MSIE UINT32_C(0x00000008)
+#define MIP_MSIP UINT32_C(0x00000008)
+#define MACHINE_ECALL_CAUSE UINT32_C(0x0000000b)
+#define MACHINE_SOFTWARE_IRQ_CAUSE UINT32_C(0x80000003)
+
+static inline void c10_global_irq_enable(bool enable)
+{
+    if (enable)
+        set_csr(mstatus, MSTATUS_MIE);
+    else
+        clear_csr(mstatus, MSTATUS_MIE);
+}
+
+static inline void c10_software_irq_enable(bool enable)
+{
+    if (enable)
+        set_csr(mie, MIE_MSIE);
+    else
+        clear_csr(mie, MIE_MSIE);
+}
+
+static inline void c10_disable_interrupts(void)
+{
+    c10_global_irq_enable(false);
+    c10_software_irq_enable(false);
+    tb_clr_softirq(0);
+}
+
+static inline void c10_settle(void)
+{
+    for (uint32_t i = 0; i < 32u; ++i)
+        __asm__ volatile("nop");
+}
+
+static inline bool c10_wait_for(volatile uint32_t *value, uint32_t expected)
+{
+    for (uint32_t i = 0; i < 100000u; ++i) {
+        if (*value == expected)
+            return true;
+        __asm__ volatile("wfi");
+    }
+    return false;
+}
+
+static inline void c10_report(const char *label, uint32_t value)
+{
+    tb_puts(label);
+    tb_put_u32(value);
+}
+
+#endif