edu: add memory test
To test:
./x86_64-softmmu/qemu-system-x86_64 -m 1100 -device edu
and watch the standard error.
Output on LE system:
$ ./x86_64-softmmu/qemu-system-x86_64 -m 1100 -device edu
41424344
edu_test_write: 0 <- 44434241
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index fe50b42..9096ce5 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -38,6 +38,8 @@
typedef struct {
PCIDevice pdev;
MemoryRegion mmio;
+ MemoryRegion testendian;
+ AddressSpace spaceendian;
QemuThread thread;
QemuMutex thr_mutex;
@@ -278,6 +280,29 @@
.endianness = DEVICE_NATIVE_ENDIAN,
};
+static uint64_t edu_test_read(void *opaque, hwaddr addr, unsigned size)
+{
+ fprintf(stderr, "edu_test_read: %llx\n", (unsigned long long)addr);
+ return 0xdead;
+}
+
+static void edu_test_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned size)
+{
+ fprintf(stderr, "edu_test_write: %llx <- %llx\n", (unsigned long long)addr,
+ (unsigned long long)val);
+}
+
+static const MemoryRegionOps edu_test_ops = {
+ .read = edu_test_read,
+ .write = edu_test_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+};
+
/*
* We purposely use a thread, so that users are forced to wait for the status
* register.
@@ -331,6 +356,10 @@
{
EduState *edu = DO_UPCAST(EduState, pdev, pdev);
uint8_t *pci_conf = pdev->config;
+ uint8_t buf[4];
+ void *p;
+ hwaddr addr;
+ hwaddr plen;
timer_init_ms(&edu->dma_timer, QEMU_CLOCK_VIRTUAL, edu_dma_timer, edu);
@@ -345,6 +374,21 @@
"edu-mmio", 1 << 20);
pci_register_bar(pdev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &edu->mmio);
+ addr = 0x40000000ULL;
+ plen = 4096;
+ /* Setup: write at PA 0x80000000 */
+ p = address_space_map(&address_space_memory, addr, &plen, 1);
+ memcpy(p, "ABCD", 4);
+ address_space_unmap(&address_space_memory, p, plen, 1, 4);
+ memory_region_init_io(&edu->testendian, OBJECT(edu), &edu_test_ops, edu,
+ "edu-testendian", 4);
+ address_space_init(&edu->spaceendian, &edu->testendian, "edu-spaceendian");
+
+ /* Setup: read at PA 0x80000000, write into device. */
+ address_space_rw(&address_space_memory, addr, MEMTXATTRS_UNSPECIFIED, buf, sizeof buf, 0);
+ fprintf(stderr, "%x%x%x%x\n", buf[0], buf[1], buf[2], buf[3]);
+ address_space_rw(&edu->spaceendian, 0, MEMTXATTRS_UNSPECIFIED, buf, sizeof buf, 1);
+
return 0;
}