move to monorepo

+ Will probably have to make some changes to dir layout to make things
  make more sense

1 files changed, 62 insertions, 0 deletions

diff --git a/triscv/src/main.c b/triscv/src/main.c
new file mode 100644
index 0000000..7acc958
--- /dev/null
+++ b/triscv/src/main.c
@@ -0,0 +1,62 @@
+#include <triscv/uart.h>
+#include <triscv/cpu.h>
+#include <triscv/mmu.h>
+#include <triscv/tmb.h>
+#include <triscv/mem.h>
+
+#define OPCODE(t) (t)
+#define RD(t) ((t) << 10)
+#define RS1(t) ((t) << 28)
+#define RS2(t) ((t) << 36)
+#define IMM4(t) ((t) << 10)
+#define IMM5(t) ((t) << 44)
+#define IMM9(t) ((t) << 36)
+#define IMM18(t) ((t) << 18)
+
+static const tri_t prog[] = {
+	/* li x1, '0' (48) */
+	/* or in this case, lui x1, 0, addi x1, 48 */
+	OPCODE(0b0100ULL) | RD(0b01ULL) | IMM18(0b0ULL),
+	OPCODE(0b0000ULL) | RD(0b01ULL) | RS1(0b01ULL) | IMM9(0b0110100100ULL),
+	/* li x2, 19683 (uart base reg) */
+	OPCODE(0b0100ULL) | RD(0b10ULL) | IMM18(0b1ULL),
+	OPCODE(0b0000ULL) | RD(0b10ULL) | RS1(0b10ULL) | IMM9(0ULL),
+	/* sw x1, 0(x2) */
+	OPCODE(0b0010ULL) | RS2(0b01ULL) | RS1(0b10ULL),
+	/* li x1, 3 (mpower)*/
+	OPCODE(0b0100ULL) | RD(0b01ULL),
+	OPCODE(0b0000ULL) | RD(0b01ULL) | RS1(0b01ULL) | IMM9(0b0100ULL),
+	/* csrrw mpower, x0, x1 */
+	/* mpower = -9841, which is then internally converted to 0 */
+	/* NOT FINAL CSR VALUE */
+	OPCODE(0b0001ULL) | RD(0b00ULL) | RS1(0b01ULL) | IMM9(0b101010101010101010UL)
+};
+
+int main()
+{
+	/* add memory regions etc. */
+	struct mmu *mmu = mmu_create();
+
+	/* map one trinary page */
+	struct mem *mem = mem_create(19683);
+	mem_init(mem, prog, 8);
+	mmu_map_dev(mmu, 0, mem_dev(mem));
+
+	struct uart *uart = uart_create();
+	mmu_map_dev(mmu, 19683, uart_dev(uart));
+
+	struct tmb *tmb = tmb_create();
+
+	/* one cpu for each core we want */
+	struct cpu *cpu = cpu_create(mmu, tmb);
+
+	cpu_run(cpu, 0);
+
+	uart_destroy(uart);
+	cpu_destroy(cpu);
+	tmb_destroy(tmb);
+	mmu_destroy(mmu);
+	mem_destroy(mem);
+
+	return 0;
+}