aboutsummaryrefslogtreecommitdiff
path: root/hw/spapr_vty.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/spapr_vty.c')
-rw-r--r--hw/spapr_vty.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/hw/spapr_vty.c b/hw/spapr_vty.c
new file mode 100644
index 0000000000..b4da6a83fb
--- /dev/null
+++ b/hw/spapr_vty.c
@@ -0,0 +1,150 @@
+#include "qdev.h"
+#include "qemu-char.h"
+#include "hw/spapr.h"
+#include "hw/spapr_vio.h"
+
+#define VTERM_BUFSIZE 16
+
+typedef struct VIOsPAPRVTYDevice {
+ VIOsPAPRDevice sdev;
+ CharDriverState *chardev;
+ uint32_t in, out;
+ uint8_t buf[VTERM_BUFSIZE];
+} VIOsPAPRVTYDevice;
+
+static int vty_can_receive(void *opaque)
+{
+ VIOsPAPRVTYDevice *dev = (VIOsPAPRVTYDevice *)opaque;
+
+ return (dev->in - dev->out) < VTERM_BUFSIZE;
+}
+
+static void vty_receive(void *opaque, const uint8_t *buf, int size)
+{
+ VIOsPAPRVTYDevice *dev = (VIOsPAPRVTYDevice *)opaque;
+ int i;
+
+ for (i = 0; i < size; i++) {
+ assert((dev->in - dev->out) < VTERM_BUFSIZE);
+ dev->buf[dev->in++ % VTERM_BUFSIZE] = buf[i];
+ }
+}
+
+static int vty_getchars(VIOsPAPRDevice *sdev, uint8_t *buf, int max)
+{
+ VIOsPAPRVTYDevice *dev = (VIOsPAPRVTYDevice *)sdev;
+ int n = 0;
+
+ while ((n < max) && (dev->out != dev->in)) {
+ buf[n++] = dev->buf[dev->out++ % VTERM_BUFSIZE];
+ }
+
+ return n;
+}
+
+void vty_putchars(VIOsPAPRDevice *sdev, uint8_t *buf, int len)
+{
+ VIOsPAPRVTYDevice *dev = (VIOsPAPRVTYDevice *)sdev;
+
+ /* FIXME: should check the qemu_chr_write() return value */
+ qemu_chr_write(dev->chardev, buf, len);
+}
+
+static int spapr_vty_init(VIOsPAPRDevice *sdev)
+{
+ VIOsPAPRVTYDevice *dev = (VIOsPAPRVTYDevice *)sdev;
+
+ qemu_chr_add_handlers(dev->chardev, vty_can_receive,
+ vty_receive, NULL, dev);
+
+ return 0;
+}
+
+static target_ulong h_put_term_char(CPUState *env, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ target_ulong reg = args[0];
+ target_ulong len = args[1];
+ target_ulong char0_7 = args[2];
+ target_ulong char8_15 = args[3];
+ VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
+ uint8_t buf[16];
+
+ if (!sdev) {
+ return H_PARAMETER;
+ }
+
+ if (len > 16) {
+ return H_PARAMETER;
+ }
+
+ *((uint64_t *)buf) = cpu_to_be64(char0_7);
+ *((uint64_t *)buf + 1) = cpu_to_be64(char8_15);
+
+ vty_putchars(sdev, buf, len);
+
+ return H_SUCCESS;
+}
+
+static target_ulong h_get_term_char(CPUState *env, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ target_ulong reg = args[0];
+ target_ulong *len = args + 0;
+ target_ulong *char0_7 = args + 1;
+ target_ulong *char8_15 = args + 2;
+ VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
+ uint8_t buf[16];
+
+ if (!sdev) {
+ return H_PARAMETER;
+ }
+
+ *len = vty_getchars(sdev, buf, sizeof(buf));
+ if (*len < 16) {
+ memset(buf + *len, 0, 16 - *len);
+ }
+
+ *char0_7 = be64_to_cpu(*((uint64_t *)buf));
+ *char8_15 = be64_to_cpu(*((uint64_t *)buf + 1));
+
+ return H_SUCCESS;
+}
+
+void spapr_vty_create(VIOsPAPRBus *bus,
+ uint32_t reg, CharDriverState *chardev)
+{
+ DeviceState *dev;
+
+ dev = qdev_create(&bus->bus, "spapr-vty");
+ qdev_prop_set_uint32(dev, "reg", reg);
+ qdev_prop_set_chr(dev, "chardev", chardev);
+ qdev_init_nofail(dev);
+}
+
+static void vty_hcalls(VIOsPAPRBus *bus)
+{
+ spapr_register_hypercall(H_PUT_TERM_CHAR, h_put_term_char);
+ spapr_register_hypercall(H_GET_TERM_CHAR, h_get_term_char);
+}
+
+static VIOsPAPRDeviceInfo spapr_vty = {
+ .init = spapr_vty_init,
+ .dt_name = "vty",
+ .dt_type = "serial",
+ .dt_compatible = "hvterm1",
+ .hcalls = vty_hcalls,
+ .qdev.name = "spapr-vty",
+ .qdev.size = sizeof(VIOsPAPRVTYDevice),
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0),
+ DEFINE_PROP_CHR("chardev", VIOsPAPRVTYDevice, chardev),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static void spapr_vty_register(void)
+{
+ spapr_vio_bus_register_withprop(&spapr_vty);
+}
+device_init(spapr_vty_register);