3 files changed, 173 insertions, 0 deletions
diff --git a/tests/simple_mesh1d/sim.c b/tests/simple_mesh1d/sim.c
new file mode 100644
index 0000000..c5f7290
--- /dev/null
+++ b/tests/simple_mesh1d/sim.c
@@ -0,0 +1,88 @@
+#include <assert.h>
+
+#include <gran/root.h>
+#include <gran/mem/simple_mem.h>
+#include <gran/bus/simple_bus.h>
+#include <gran/uart/simple_uart.h>
+#include <gran/mesh/node1d.h>
+#include <gran/cpu/riscv/simple_riscv64.h>
+
+#include "../build/tests/simple_mesh1d/test.inc"
+
+static stat build_node1d(struct clock_domain *clk, uint16_t x, uint16_t y)
+{
+	struct component **mesh = calloc(x + 1, sizeof(struct component *));
+	assert(mesh);
+
+	for (int i = 1; i < x + 1; ++i) {
+		/* 4 CPUs + 1 mem = 5 elems in total */
+		struct component *node = create_mesh_node1d(i, y + 1);
+		clock_domain_add(clk, node);
+		mesh[i] = node;
+
+		for (int j = 0; j < y; ++j) {
+			struct component *imem = create_simple_mem(4096);
+			init_simple_mem(imem, 0,
+					build_tests_simple_mesh1d_test_bin_len,
+					build_tests_simple_mesh1d_test_bin);
+
+			uint64_t rcv = mesh1d_addr(i, j, 0);
+			struct component *rv64 = create_simple_riscv64(rcv, 0, imem, node);
+			simple_riscv64_set_reg(rv64, 10, i); /* a0 */
+			simple_riscv64_set_reg(rv64, 11, j); /* a1 */
+			simple_riscv64_set_reg(rv64, 12, x); /* a2 */
+			simple_riscv64_set_reg(rv64, 13, y); /* a3 */
+
+			clock_domain_add(clk, rv64);
+			clock_domain_add(clk, imem);
+
+			mesh_node1d_connect(node, rv64, j);
+		}
+
+		struct component *dmem = create_simple_mem(4096);
+		clock_domain_add(clk, dmem);
+		mesh_node1d_connect(node, dmem, 4);
+	}
+
+	/* extra I/O node (kind of?) */
+	struct component *node = create_mesh_node1d(0, 2);
+	clock_domain_add(clk, node);
+	mesh[0] = node;
+
+	struct component *uart = create_simple_uart();
+	clock_domain_add(clk, uart);
+	mesh_node1d_connect(node, uart, 0);
+
+	struct component *dmem = create_simple_mem(4096);
+	clock_domain_add(clk, dmem);
+	mesh_node1d_connect(node, dmem, 1);
+
+	for (int i = 0; i < x + 1; ++i) {
+		if (i - 1 >= 0)
+			mesh_node1d_connect_right(mesh[i], mesh[i - 1]);
+
+		if (i + 1 < x + 1)
+			mesh_node1d_connect_left(mesh[i], mesh[i + 1]);
+	}
+
+	free(mesh);
+	return OK;
+}
+
+int main()
+{
+	struct clock_domain *clk = create_clock_domain(NS(1));
+
+	/* one cluster with four cores + mem for each core (should
+	 * instructions be fetched from cluster local mem?) */
+	stat r = build_node1d(clk, 8, 8);
+	assert(r == OK);
+
+	struct gran_root *root = create_root();
+	root_add_clock(root, clk);
+
+	r = root_run(root);
+	assert(r == OK);
+
+	destroy_root(root);
+}
diff --git a/tests/simple_mesh1d/source.mk b/tests/simple_mesh1d/source.mk
new file mode 100644
index 0000000..5013c6e
--- /dev/null
+++ b/tests/simple_mesh1d/source.mk
@@ -0,0 +1,19 @@
+MESH1D_TEST_OBJ	!= ./scripts/gen-deps --sources "tests/simple_mesh1d/sim.c"
+TEST_PROGS	+= build/tests/simple_mesh1d/sim
+
+build/tests/simple_mesh1d/test.inc: tests/simple_mesh1d/test.c
+	riscv64-unknown-elf-gcc -O2 -Wall -Wextra -ffreestanding -nostdlib \
+		-march=rv64i -mabi=lp64 \
+		-fno-delete-null-pointer-checks \
+		-o build/tests/simple_mesh1d/test \
+		tests/simple_mesh1d/test.c
+	riscv64-unknown-elf-objcopy -Obinary \
+		build/tests/simple_mesh1d/test \
+		build/tests/simple_mesh1d/test.bin
+	xxd -i build/tests/simple_mesh1d/test.bin \
+		> build/tests/simple_mesh1d/test.inc
+
+build/tests/simple_mesh1d/sim.o: build/tests/simple_mesh1d/test.inc
+
+build/tests/simple_mesh1d/sim: $(MESH1D_TEST_OBJ) $(OBJS)
+	$(COMPILE) $(MESH1D_TEST_OBJ) $(OBJS) -o $@
diff --git a/tests/simple_mesh1d/test.c b/tests/simple_mesh1d/test.c
new file mode 100644
index 0000000..b3de347
--- /dev/null
+++ b/tests/simple_mesh1d/test.c
@@ -0,0 +1,66 @@
+#include <stdint.h>
+
+__attribute__((always_inline))
+static inline uint64_t extreme_numa_addr(uint16_t cluster, uint16_t elem, uint32_t off)
+{
+	return ((uint64_t)cluster << 48) | ((uint64_t)elem << 32) | off;
+}
+
+__attribute__((always_inline))
+static inline void print_int8(volatile char *uart, unsigned x)
+{
+	char lo_nibble = (x >> 0) & 0xf;
+	char hi_nibble = (x >> 4) & 0xf;
+
+	*uart = hi_nibble < 10 ? hi_nibble + '0' : (hi_nibble - 10) + 'a';
+	*uart = lo_nibble < 10 ? lo_nibble + '0' : (lo_nibble - 10) + 'a';
+}
+
+__attribute__((always_inline))
+static inline void print_addr(volatile char *uart, unsigned x, unsigned y)
+{
+	*uart = '(';
+	print_int8(uart, x);
+	*uart = ',';
+	*uart = ' ';
+	print_int8(uart, y);
+	*uart = ')';
+	*uart = '\n';
+}
+
+__attribute__((always_inline))
+static inline uint64_t wrap(unsigned x, unsigned X)
+{
+	return x + 1 >= X ? 0 : x + 1;
+}
+
+__attribute__((always_inline))
+static inline uint64_t next_idx(unsigned x, unsigned y, unsigned X, unsigned Y)
+{
+	unsigned yi = wrap(y, Y);
+	unsigned xi = yi < y ? wrap(x, X) : x;
+
+	return extreme_numa_addr(xi, yi, 0);
+}
+
+void _start(unsigned x, unsigned y, unsigned X, unsigned Y)
+{
+	volatile char *uart = (char *)extreme_numa_addr(0, 0, 0);
+	volatile uint64_t *control = (uint64_t *)extreme_numa_addr(0, 1, 0);
+
+	if (x == 1 && y == 0) {
+		goto do_work;
+	} else {
+		while (*control != extreme_numa_addr(x, y, 0)) {}
+	}
+
+do_work:
+	print_addr(uart, x, y);
+	*control = next_idx(x, y, X, Y);
+
+	if (x == X - 1 && y == Y - 1)
+		asm("ebreak");
+
+	/* otherwise just loop */
+	while (1) {}
+}