@@ -171,6 +171,7 @@ F: hw/*/milkymist-*
F: include/hw/char/lm32_juart.h
F: include/hw/lm32/
F: tests/tcg/lm32/
+F: tests/milkymist-*
M68K
M: Laurent Vivier <laurent@vivier.eu>
@@ -9,6 +9,8 @@ static inline DeviceState *lm32_pic_init(qemu_irq cpu_irq)
SysBusDevice *d;
dev = qdev_create(NULL, "lm32-pic");
+ object_property_add_child(qdev_get_machine(), "lm32-pic", OBJECT(dev),
+ NULL);
qdev_init_nofail(dev);
d = SYS_BUS_DEVICE(dev);
sysbus_connect_irq(d, 0, cpu_irq);
@@ -406,6 +406,8 @@ check-qtest-s390x-y += tests/virtio-console-test$(EXESUF)
check-qtest-s390x-y += tests/virtio-serial-test$(EXESUF)
check-qtest-s390x-y += tests/cpu-plug-test$(EXESUF)
+check-qtest-lm32-y = tests/milkymist-pfpu-test$(EXESUF)
+
check-qtest-generic-y += tests/machine-none-test$(EXESUF)
check-qtest-generic-y += tests/qom-test$(EXESUF)
check-qtest-generic-y += tests/test-hmp$(EXESUF)
@@ -868,6 +870,8 @@ tests/migration/initrd-stress.img: tests/migration/stress$(EXESUF)
rm $(INITRD_WORK_DIR)/init
rmdir $(INITRD_WORK_DIR)
+tests/milkymist-pfpu-test$(EXESUF): tests/milkymist-pfpu-test.o
+
ifeq ($(CONFIG_POSIX),y)
LIBS += -lutil
endif
new file mode 100644
@@ -0,0 +1,193 @@
+/*
+ * QTest testcase for the Milkymist PFPU
+ *
+ * Copyright (c) 2018 Michael Walle <michael@walle.cc>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+
+#include "libqtest.h"
+
+#define PFPU_BASE 0x60006000
+#define PFPU_IRQ 8
+
+static void pfpu_load_microcode(uint32_t *insn, int len)
+{
+ uint32_t addr = PFPU_BASE + 0x800;
+ while (len) {
+ writel(addr, *insn);
+ insn++;
+ len--;
+ addr += 4;
+ }
+}
+
+static void pfpu_clear_microcode(void)
+{
+ uint32_t addr = PFPU_BASE + 0x800;
+ uint32_t len = 512;
+ while (len) {
+ writel(addr, 0);
+ len--;
+ addr += 4;
+ }
+}
+
+static uint32_t float_to_u32(float val)
+{
+ return (*((uint32_t *)&(val)));
+}
+
+static void pfpu_add(void)
+{
+ static uint32_t ucode[] = {
+ 0x000c2080, /* FADD R3, R4 */
+ 0x00000000, /* NOP */
+ 0x00000000, /* NOP */
+ 0x00000000, /* NOP */
+ 0x00000000, /* NOP */
+ 0x00000003, /* NOP | EXIT R3 */
+ 0x000c2380 /* VECTOUT R3, R4 */
+ };
+
+ /* 2x1 mesh size */
+ writel(PFPU_BASE + 0x8, 1);
+ writel(PFPU_BASE + 0xc, 0);
+
+ /* write test operands to r3 and r4 */
+ writel(PFPU_BASE + 0x40c, float_to_u32(3.0f));
+ writel(PFPU_BASE + 0x410, float_to_u32(9.0f));
+
+ pfpu_load_microcode(ucode, ARRAY_SIZE(ucode));
+
+ /* dma base */
+ writel(PFPU_BASE + 0x4, 0x40000000);
+
+ /* start */
+ writel(PFPU_BASE, 1);
+
+ /* on a successful run, the busy flag should be cleared */
+ g_assert(readl(PFPU_BASE) == 0);
+
+ /* interrupt line should have been pulsed */
+ g_assert(get_irq_latched(PFPU_IRQ) == 1);
+ clear_irq_latch(PFPU_IRQ);
+ g_assert(get_irq_latched(PFPU_IRQ) == 0);
+
+ /* resulting vertices should be written to RAM */
+ g_assert(readl(0x40000000) == float_to_u32(12.0f));
+ g_assert(readl(0x40000004) == float_to_u32(9.0f));
+ g_assert(readl(0x40000008) == float_to_u32(21.0f));
+ g_assert(readl(0x4000000c) == float_to_u32(9.0f));
+
+ /* count of computed vertices */
+ g_assert(readl(PFPU_BASE + 0x14) == 2);
+
+ /* no collisions */
+ g_assert(readl(PFPU_BASE + 0x18) == 0);
+
+ /* no stray writes */
+ g_assert(readl(PFPU_BASE + 0x1c) == 0);
+}
+
+static void pfpu_microcode_overflow(void)
+{
+ /* 1x1 mesh size */
+ writel(PFPU_BASE + 0x8, 1);
+ writel(PFPU_BASE + 0xc, 0);
+
+ pfpu_clear_microcode();
+
+ /* start */
+ writel(PFPU_BASE, 1);
+
+ /* because there is no VECTOUT, the busy flag should not be cleared */
+ g_assert(readl(PFPU_BASE) == 1);
+
+ /* and there should be no pending interrupt */
+ g_assert(get_irq_latched(PFPU_IRQ) == 0);
+}
+
+static void pfpu_stray_writes(void)
+{
+ static uint32_t ucode[] = {
+ 0x000c0600, /* COPY R3 */
+ 0x00000000, /* NOP */
+ 0x00000000, /* NOP */
+ 0x000c2380 /* VECTOUT R3, R4 */
+ };
+
+ /* 1x1 mesh size */
+ writel(PFPU_BASE + 0x8, 0);
+ writel(PFPU_BASE + 0xc, 0);
+
+ /* write test operands to r3 and r4 */
+ writel(PFPU_BASE + 0x40c, float_to_u32(1.0f));
+ writel(PFPU_BASE + 0x410, float_to_u32(2.0f));
+
+ pfpu_load_microcode(ucode, ARRAY_SIZE(ucode));
+
+ /* dma base */
+ writel(PFPU_BASE + 0x4, 0x40000000);
+
+ /* start */
+ writel(PFPU_BASE, 1);
+ clear_irq_latch(PFPU_IRQ);
+
+ /* stray writes */
+ g_assert(readl(PFPU_BASE + 0x1c) == 1);
+}
+
+static void pfpu_collision(void)
+{
+ static uint32_t ucode[] = {
+ 0x000c0300, /* I2F R3 */
+ 0x000c0600, /* COPY R3 */
+ 0x00000000, /* NOP */
+ 0x00000000, /* NOP */
+ 0x000c2380 /* VECTOUT R3, R4 */
+ };
+
+ /* 1x1 mesh size */
+ writel(PFPU_BASE + 0x8, 0);
+ writel(PFPU_BASE + 0xc, 0);
+
+ /* write test operands to r3 and r4 */
+ writel(PFPU_BASE + 0x40c, float_to_u32(1.0f));
+ writel(PFPU_BASE + 0x410, float_to_u32(2.0f));
+
+ pfpu_load_microcode(ucode, ARRAY_SIZE(ucode));
+
+ /* dma base */
+ writel(PFPU_BASE + 0x4, 0x40000000);
+
+ /* start */
+ writel(PFPU_BASE, 1);
+ clear_irq_latch(PFPU_IRQ);
+
+ /* collisions */
+ g_assert(readl(PFPU_BASE + 0x18) == 1);
+}
+
+int main(int argc, char **argv)
+{
+ int ret;
+
+ g_test_init(&argc, &argv, NULL);
+
+ qtest_start("-machine milkymist");
+ irq_intercept_in("lm32-pic");
+ qtest_add_func("/milkymist-pfpu/add", pfpu_add);
+ qtest_add_func("/milkymist-pfpu/microcode-overflow", pfpu_microcode_overflow);
+ qtest_add_func("/milkymist-pfpu/collision", pfpu_collision);
+ qtest_add_func("/milkymist-pfpu/stray-writes", pfpu_stray_writes);
+
+ ret = g_test_run();
+
+ qtest_end();
+
+ return ret;
+}
Add initial tests which check basic computations and error cases on the PFPU. Signed-off-by: Michael Walle <michael@walle.cc> --- MAINTAINERS | 1 + hw/lm32/lm32.h | 2 + tests/Makefile.include | 4 + tests/milkymist-pfpu-test.c | 193 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 200 insertions(+) create mode 100644 tests/milkymist-pfpu-test.c