initialise a memory structure or smth

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
2023-09-11 10:23:46 +05:30
parent 84c68a4e00
commit 332f0b87d6
26 changed files with 763 additions and 163 deletions
--- a/src/cpu/psr.cc
+++ b/src/cpu/psr.cc
@@ -0,0 +1,49 @@
+#include "psr.hh"
+#include "util/bits.hh"
+
+Psr::Psr(uint32_t raw) {
+    psr = raw & PSR_CLEAR_RESERVED;
+}
+
+Mode
+Psr::mode() const {
+    return static_cast<Mode>(psr & ~PSR_CLEAR_MODE);
+}
+
+void
+Psr::set_mode(Mode mode) {
+    psr &= PSR_CLEAR_MODE;
+    psr |= static_cast<uint32_t>(mode);
+}
+
+bool
+Psr::state() const {
+    return get_nth_bit(psr, 5);
+}
+
+void
+Psr::set_state(State state) {
+    chg_nth_bit(psr, 5, static_cast<bool>(state));
+}
+
+#define GET_SET_NTH_BIT_FUNCTIONS(name, n)                                     \
+    bool Psr::name() const {                                                   \
+        return get_nth_bit(psr, n);                                            \
+    }                                                                          \
+    void Psr::set_##name(bool val) {                                           \
+        chg_nth_bit(psr, n, val);                                              \
+    }
+
+GET_SET_NTH_BIT_FUNCTIONS(fiq_disabled, 6)
+
+GET_SET_NTH_BIT_FUNCTIONS(irq_disabled, 7)
+
+GET_SET_NTH_BIT_FUNCTIONS(v, 28);
+
+GET_SET_NTH_BIT_FUNCTIONS(c, 29);
+
+GET_SET_NTH_BIT_FUNCTIONS(z, 30);
+
+GET_SET_NTH_BIT_FUNCTIONS(n, 31);
+
+#undef GET_SET_NTH_BIT_FUNCTIONS