1 files changed, 73 insertions, 0 deletions
diff --git a/devkit/cacheracer.h b/devkit/cacheracer.h
new file mode 100644
index 0000000..5885395
--- /dev/null
+++ b/devkit/cacheracer.h
@@ -0,0 +1,73 @@
+#ifndef CACHERACER_H
+#define CACHERACER_H
+
+void __start(int core_id);
+
+/** Memory Layout
+ *
+ * Memory layout differs from CS 3410. Here, we have 64MB of memory,
+ * addressable in the range 0x00000000 to 0x04000000. Each player sees
+ * their half of memory as starting at 0x00000000. Player 2 is mapped
+ * in reverse, i.e. their 0x00000000 is Player 1's 0x03FFFFFC. Memory
+ * is byte-addressed.
+ *
+ * The linker script places code beginning at 0x400. Up to 0x00100000
+ * is read-only memory containing game data. Beginning at 0x00100000
+ * are the stacks, spaced 1 MB apart. Thus the layout is
+ *
+ * 0x00000000 - 0x00100000: Read-only memory
+ * 0x00100000 - 0x02000000: Your half of read-write memory
+ * TODO: are the below addresses correct?
+ * 0x02000000 - 0x03EFFFFC: Opponent's half of read-write memory
+ * 0x03EFFFFC - 0x04000000: Opponent's read-only memory
+ */
+
+#define PLAYER_RO_SEGMENT_SIZE 0x00100000
+#define PLAYER_STACK_SIZE 0x00100000
+
+#define HOME_START 0x00000000
+#define HOME_RW_START PLAYER_RO_SEGMENT_SIZE
+#define HOME_DATA_START (PLAYER_RO_SEGMENT_SIZE + 4 * PLAYER_STACK_SIZE)
+#define HOME_RW ((void *) HOME_RW_START)
+#define HOME_DATA ((void *) HOME_DATA_START)
+
+/** Definitions of global data */
+
+#define TAUNT_SIZE 228
+
+struct player_status {
+  signed char taunt[TAUNT_SIZE];
+};
+
+/** Pointers to global structures */
+
+#define HOME_STATUS ((struct player_status*) (HOME_RW_START - sizeof(struct player_status)))
+
+__attribute__ ((unused, noinline))
+static void prints(char *fmt) {
+  __asm__ __volatile__ (
+                        "ADDI a1, %0, 0\n\t"
+                        "ADDI a0, zero, 22\n\t"
+                        "SCALL\n\t"
+                        :
+                        : "r" (fmt)
+                        );
+}
+
+__attribute__ ((unused, noinline)) static void printi(int i) {
+  /* invoke system call number 22 */
+  __asm__ __volatile__ (
+                        "ADDI a1, a0, 0\n\t"
+                        "ADDI a0, zero, 23\n\t"
+                        "SCALL\n\t"
+                        );
+}
+
+__attribute__ ((unused, noinline)) static void sneak_attack() {
+  __asm__ __volatile__ (
+                        "ADDI a0, zero, 24\n\t"
+                        "SCALL"
+                        );
+}
+
+#endif