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| author | Steven Le Rouzic <steven.lerouzic@gmail.com> | 2024-05-13 00:04:44 +0200 |
|---|---|---|
| committer | Steven Le Rouzic <steven.lerouzic@gmail.com> | 2024-05-13 00:04:44 +0200 |
| commit | f95a85de0082010e4af83e26e99299d601bb48d6 (patch) | |
| tree | 0b70ff8fa990ceeb18c2522ea80f2599d50ebae4 /emulator/csr_machine_trap_setup.c | |
| parent | f9541157b62ec44deff0b906757c223ca0220102 (diff) | |
Some work on CSR
Diffstat (limited to 'emulator/csr_machine_trap_setup.c')
| -rw-r--r-- | emulator/csr_machine_trap_setup.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/emulator/csr_machine_trap_setup.c b/emulator/csr_machine_trap_setup.c new file mode 100644 index 0000000..385460f --- /dev/null +++ b/emulator/csr_machine_trap_setup.c @@ -0,0 +1,19 @@ +#include "emulator/csr.h"
+
+#include "emulator/hart.h"
+
+static uint32_t csr_misa(Hart* hart, uint32_t v, enum CsrAction a)
+{
+ uint32_t misa = 0;
+ misa |= 1 << 30; // 32-bit
+ misa |= 1 << 8; // Base ISA
+ misa |= 1 << 12; // M extension
+ misa |= 1 << 18; // Supervisor mode
+ misa |= 1 << 20; // User mode
+ return misa;
+}
+
+void csr_init_machine_trap_setup(Hart* hart)
+{
+ hart->csrs[CSR_MISA].action = csr_misa;
+}
|