2 #include "sysemu/char.h"
3 #include "hw/ppc/spapr.h"
4 #include "hw/ppc/spapr_vio.h"
6 #define VTERM_BUFSIZE 16
8 typedef struct VIOsPAPRVTYDevice
{
10 CharDriverState
*chardev
;
12 uint8_t buf
[VTERM_BUFSIZE
];
15 #define TYPE_VIO_SPAPR_VTY_DEVICE "spapr-vty"
16 #define VIO_SPAPR_VTY_DEVICE(obj) \
17 OBJECT_CHECK(VIOsPAPRVTYDevice, (obj), TYPE_VIO_SPAPR_VTY_DEVICE)
19 static int vty_can_receive(void *opaque
)
21 VIOsPAPRVTYDevice
*dev
= VIO_SPAPR_VTY_DEVICE(opaque
);
23 return (dev
->in
- dev
->out
) < VTERM_BUFSIZE
;
26 static void vty_receive(void *opaque
, const uint8_t *buf
, int size
)
28 VIOsPAPRVTYDevice
*dev
= VIO_SPAPR_VTY_DEVICE(opaque
);
31 if ((dev
->in
== dev
->out
) && size
) {
32 /* toggle line to simulate edge interrupt */
33 qemu_irq_pulse(spapr_vio_qirq(&dev
->sdev
));
35 for (i
= 0; i
< size
; i
++) {
36 assert((dev
->in
- dev
->out
) < VTERM_BUFSIZE
);
37 dev
->buf
[dev
->in
++ % VTERM_BUFSIZE
] = buf
[i
];
41 static int vty_getchars(VIOsPAPRDevice
*sdev
, uint8_t *buf
, int max
)
43 VIOsPAPRVTYDevice
*dev
= VIO_SPAPR_VTY_DEVICE(sdev
);
46 while ((n
< max
) && (dev
->out
!= dev
->in
)) {
47 buf
[n
++] = dev
->buf
[dev
->out
++ % VTERM_BUFSIZE
];
50 qemu_chr_accept_input(dev
->chardev
);
55 void vty_putchars(VIOsPAPRDevice
*sdev
, uint8_t *buf
, int len
)
57 VIOsPAPRVTYDevice
*dev
= VIO_SPAPR_VTY_DEVICE(sdev
);
59 /* FIXME: should check the qemu_chr_fe_write() return value */
60 qemu_chr_fe_write(dev
->chardev
, buf
, len
);
63 static int spapr_vty_init(VIOsPAPRDevice
*sdev
)
65 VIOsPAPRVTYDevice
*dev
= VIO_SPAPR_VTY_DEVICE(sdev
);
68 fprintf(stderr
, "spapr-vty: Can't create vty without a chardev!\n");
72 qemu_chr_add_handlers(dev
->chardev
, vty_can_receive
,
73 vty_receive
, NULL
, dev
);
78 /* Forward declaration */
79 static target_ulong
h_put_term_char(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
80 target_ulong opcode
, target_ulong
*args
)
82 target_ulong reg
= args
[0];
83 target_ulong len
= args
[1];
84 target_ulong char0_7
= args
[2];
85 target_ulong char8_15
= args
[3];
89 sdev
= vty_lookup(spapr
, reg
);
98 *((uint64_t *)buf
) = cpu_to_be64(char0_7
);
99 *((uint64_t *)buf
+ 1) = cpu_to_be64(char8_15
);
101 vty_putchars(sdev
, buf
, len
);
106 static target_ulong
h_get_term_char(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
107 target_ulong opcode
, target_ulong
*args
)
109 target_ulong reg
= args
[0];
110 target_ulong
*len
= args
+ 0;
111 target_ulong
*char0_7
= args
+ 1;
112 target_ulong
*char8_15
= args
+ 2;
113 VIOsPAPRDevice
*sdev
;
116 sdev
= vty_lookup(spapr
, reg
);
121 *len
= vty_getchars(sdev
, buf
, sizeof(buf
));
123 memset(buf
+ *len
, 0, 16 - *len
);
126 *char0_7
= be64_to_cpu(*((uint64_t *)buf
));
127 *char8_15
= be64_to_cpu(*((uint64_t *)buf
+ 1));
132 void spapr_vty_create(VIOsPAPRBus
*bus
, CharDriverState
*chardev
)
136 dev
= qdev_create(&bus
->bus
, "spapr-vty");
137 qdev_prop_set_chr(dev
, "chardev", chardev
);
138 qdev_init_nofail(dev
);
141 static Property spapr_vty_properties
[] = {
142 DEFINE_SPAPR_PROPERTIES(VIOsPAPRVTYDevice
, sdev
),
143 DEFINE_PROP_CHR("chardev", VIOsPAPRVTYDevice
, chardev
),
144 DEFINE_PROP_END_OF_LIST(),
147 static const VMStateDescription vmstate_spapr_vty
= {
150 .minimum_version_id
= 1,
151 .minimum_version_id_old
= 1,
152 .fields
= (VMStateField
[]) {
153 VMSTATE_SPAPR_VIO(sdev
, VIOsPAPRVTYDevice
),
155 VMSTATE_UINT32(in
, VIOsPAPRVTYDevice
),
156 VMSTATE_UINT32(out
, VIOsPAPRVTYDevice
),
157 VMSTATE_BUFFER(buf
, VIOsPAPRVTYDevice
),
158 VMSTATE_END_OF_LIST()
162 static void spapr_vty_class_init(ObjectClass
*klass
, void *data
)
164 DeviceClass
*dc
= DEVICE_CLASS(klass
);
165 VIOsPAPRDeviceClass
*k
= VIO_SPAPR_DEVICE_CLASS(klass
);
167 k
->init
= spapr_vty_init
;
169 k
->dt_type
= "serial";
170 k
->dt_compatible
= "hvterm1";
171 set_bit(DEVICE_CATEGORY_INPUT
, dc
->categories
);
172 dc
->props
= spapr_vty_properties
;
173 dc
->vmsd
= &vmstate_spapr_vty
;
176 static const TypeInfo spapr_vty_info
= {
177 .name
= TYPE_VIO_SPAPR_VTY_DEVICE
,
178 .parent
= TYPE_VIO_SPAPR_DEVICE
,
179 .instance_size
= sizeof(VIOsPAPRVTYDevice
),
180 .class_init
= spapr_vty_class_init
,
183 VIOsPAPRDevice
*spapr_vty_get_default(VIOsPAPRBus
*bus
)
185 VIOsPAPRDevice
*sdev
, *selected
;
189 * To avoid the console bouncing around we want one VTY to be
190 * the "default". We haven't really got anything to go on, so
191 * arbitrarily choose the one with the lowest reg value.
195 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
196 DeviceState
*iter
= kid
->child
;
198 /* Only look at VTY devices */
199 if (!object_dynamic_cast(OBJECT(iter
), "spapr-vty")) {
203 sdev
= VIO_SPAPR_DEVICE(iter
);
205 /* First VTY we've found, so it is selected for now */
211 /* Choose VTY with lowest reg value */
212 if (sdev
->reg
< selected
->reg
) {
220 VIOsPAPRDevice
*vty_lookup(sPAPREnvironment
*spapr
, target_ulong reg
)
222 VIOsPAPRDevice
*sdev
;
224 sdev
= spapr_vio_find_by_reg(spapr
->vio_bus
, reg
);
225 if (!sdev
&& reg
== 0) {
226 /* Hack for kernel early debug, which always specifies reg==0.
227 * We search all VIO devices, and grab the vty with the lowest
228 * reg. This attempts to mimic existing PowerVM behaviour
229 * (early debug does work there, despite having no vty with
231 return spapr_vty_get_default(spapr
->vio_bus
);
237 static void spapr_vty_register_types(void)
239 spapr_register_hypercall(H_PUT_TERM_CHAR
, h_put_term_char
);
240 spapr_register_hypercall(H_GET_TERM_CHAR
, h_get_term_char
);
241 type_register_static(&spapr_vty_info
);
244 type_init(spapr_vty_register_types
)