diff options
Diffstat (limited to 'hw/spapr_vty.c')
| -rw-r--r-- | hw/spapr_vty.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/hw/spapr_vty.c b/hw/spapr_vty.c deleted file mode 100644 index be08571d23..0000000000 --- a/hw/spapr_vty.c +++ /dev/null @@ -1,221 +0,0 @@ -#include "hw/qdev.h" -#include "char/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; - - if ((dev->in == dev->out) && size) { - /* toggle line to simulate edge interrupt */ - qemu_irq_pulse(spapr_vio_qirq(&dev->sdev)); - } - 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_fe_write() return value */ - qemu_chr_fe_write(dev->chardev, buf, len); -} - -static int spapr_vty_init(VIOsPAPRDevice *sdev) -{ - VIOsPAPRVTYDevice *dev = (VIOsPAPRVTYDevice *)sdev; - - if (!dev->chardev) { - fprintf(stderr, "spapr-vty: Can't create vty without a chardev!\n"); - exit(1); - } - - qemu_chr_add_handlers(dev->chardev, vty_can_receive, - vty_receive, NULL, dev); - - return 0; -} - -/* Forward declaration */ -static target_ulong h_put_term_char(PowerPCCPU *cpu, 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; - uint8_t buf[16]; - - sdev = vty_lookup(spapr, reg); - 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(PowerPCCPU *cpu, 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; - uint8_t buf[16]; - - sdev = vty_lookup(spapr, reg); - 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, CharDriverState *chardev) -{ - DeviceState *dev; - - dev = qdev_create(&bus->bus, "spapr-vty"); - qdev_prop_set_chr(dev, "chardev", chardev); - qdev_init_nofail(dev); -} - -static Property spapr_vty_properties[] = { - DEFINE_SPAPR_PROPERTIES(VIOsPAPRVTYDevice, sdev), - DEFINE_PROP_CHR("chardev", VIOsPAPRVTYDevice, chardev), - DEFINE_PROP_END_OF_LIST(), -}; - -static void spapr_vty_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); - - k->init = spapr_vty_init; - k->dt_name = "vty"; - k->dt_type = "serial"; - k->dt_compatible = "hvterm1"; - dc->props = spapr_vty_properties; -} - -static const TypeInfo spapr_vty_info = { - .name = "spapr-vty", - .parent = TYPE_VIO_SPAPR_DEVICE, - .instance_size = sizeof(VIOsPAPRVTYDevice), - .class_init = spapr_vty_class_init, -}; - -VIOsPAPRDevice *spapr_vty_get_default(VIOsPAPRBus *bus) -{ - VIOsPAPRDevice *sdev, *selected; - BusChild *kid; - - /* - * To avoid the console bouncing around we want one VTY to be - * the "default". We haven't really got anything to go on, so - * arbitrarily choose the one with the lowest reg value. - */ - - selected = NULL; - QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { - DeviceState *iter = kid->child; - - /* Only look at VTY devices */ - if (!object_dynamic_cast(OBJECT(iter), "spapr-vty")) { - continue; - } - - sdev = DO_UPCAST(VIOsPAPRDevice, qdev, iter); - - /* First VTY we've found, so it is selected for now */ - if (!selected) { - selected = sdev; - continue; - } - - /* Choose VTY with lowest reg value */ - if (sdev->reg < selected->reg) { - selected = sdev; - } - } - - return selected; -} - -VIOsPAPRDevice *vty_lookup(sPAPREnvironment *spapr, target_ulong reg) -{ - VIOsPAPRDevice *sdev; - - sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); - if (!sdev && reg == 0) { - /* Hack for kernel early debug, which always specifies reg==0. - * We search all VIO devices, and grab the vty with the lowest - * reg. This attempts to mimic existing PowerVM behaviour - * (early debug does work there, despite having no vty with - * reg==0. */ - return spapr_vty_get_default(spapr->vio_bus); - } - - return sdev; -} - -static void spapr_vty_register_types(void) -{ - spapr_register_hypercall(H_PUT_TERM_CHAR, h_put_term_char); - spapr_register_hypercall(H_GET_TERM_CHAR, h_get_term_char); - type_register_static(&spapr_vty_info); -} - -type_init(spapr_vty_register_types) |