From 072cb452e1b6742fa92b68897e97b7cd4329e0b3 Mon Sep 17 00:00:00 2001
From: hyenasky <ashnwill49@gmail.com>
Date: Wed, 26 Oct 2022 12:08:13 -0600
Subject: [PATCH] make writes to readonly pages cause a page fault correctly

---
 src/cpu.c | 4 ++++
 src/cpu.h | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/cpu.c b/src/cpu.c
index c479129..322e847 100644
--- a/src/cpu.c
+++ b/src/cpu.c
@@ -453,6 +453,10 @@ static uint8_t *vm_findmemory(vm_t *vm, uint32_t address, uint32_t size, bool wr
                 vm_panic(vm, FOX32_ERR_FAULT_WR);
             }
         }
+        if (!virtual_page->rw && write) {
+            vm->exception_operand = address;
+            vm_panic(vm, FOX32_ERR_FAULT_WR);
+        }
         uint32_t offset = address & 0x00000FFF;
         uint32_t physical_address = virtual_page->physical_address | offset;
         address_end = physical_address + size;
diff --git a/src/cpu.h b/src/cpu.h
index c05d4ca..ce9874d 100644
--- a/src/cpu.h
+++ b/src/cpu.h
@@ -5,7 +5,7 @@
 #include <stdbool.h>
 #include <setjmp.h>
 
-#define FOX32_CPU_HZ 10000000
+#define FOX32_CPU_HZ 33000000
 
 #define FOX32_MEMORY_RAM 0x04000000 //  64 MiB
 #define FOX32_MEMORY_ROM 0x00080000 // 512 KiB