From ad6107d33a8a222d9062aae45d0e8d8483939d5d Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Sun, 2 Mar 2025 17:46:57 +0200
Subject: add an idealized NoC

+ Purely virtual, doesn't exist, but would be 'theoretically' ideal.
---
 tests/simple_ideal_noc/sim.c | 74 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 tests/simple_ideal_noc/sim.c

(limited to 'tests/simple_ideal_noc/sim.c')

diff --git a/tests/simple_ideal_noc/sim.c b/tests/simple_ideal_noc/sim.c
new file mode 100644
index 0000000..4aba71d
--- /dev/null
+++ b/tests/simple_ideal_noc/sim.c
@@ -0,0 +1,74 @@
+#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/ideal_noc.h>
+#include <gran/cpu/riscv/simple_riscv64.h>
+
+#include "../build/tests/simple_ideal_noc/test.inc"
+
+static stat build_ideal_noc(struct clock_domain *clk, uint32_t x)
+{
+	struct component **pes = calloc(x, sizeof(struct component *));
+	assert(pes);
+
+	/* very much ideal noc */
+	struct component *noc = create_ideal_noc(x, 0);
+	clock_domain_add(clk, noc);
+
+	for (uint32_t i = 0; i < x; ++i) {
+		if (i == 0 || i == 1)
+			continue;
+
+		struct component *imem = create_simple_mem(4096);
+		init_simple_mem(imem, 0,
+				build_tests_simple_ideal_noc_test_bin_len,
+				build_tests_simple_ideal_noc_test_bin);
+
+		uint64_t rcv = ideal_noc_addr(i, 0);
+		struct component *rv64 = create_simple_riscv64(rcv, 0, imem, noc);
+		simple_riscv64_set_reg(rv64, 10, i); /* a0 */
+		simple_riscv64_set_reg(rv64, 11, x); /* a1 */
+
+		clock_domain_add(clk, rv64);
+		clock_domain_add(clk, imem);
+
+		pes[i] = rv64;
+	}
+
+	struct component *uart = create_simple_uart();
+	clock_domain_add(clk, uart);
+	ideal_noc_connect(noc, uart, 0);
+
+	struct component *dmem = create_simple_mem(4096);
+	clock_domain_add(clk, dmem);
+	ideal_noc_connect(noc, dmem, 1);
+
+	for (size_t i = 0; i < x; ++i) {
+		if (i == 0 || i == 1)
+			continue;
+
+		ideal_noc_connect(noc, pes[i], i);
+	}
+
+	free(pes);
+	return OK;
+}
+
+int main()
+{
+	struct clock_domain *clk = create_clock_domain(NS(1));
+
+	stat r = build_ideal_noc(clk, 64);
+	assert(r == OK);
+
+	struct gran_root *root = create_root();
+	root_add_clock(root, clk);
+
+	r = root_run(root);
+	assert(r == OK);
+
+	destroy_root(root);
+}
-- 
cgit v1.3