diff options
Diffstat (limited to 'hw/spapr_rtas.c')
| -rw-r--r-- | hw/spapr_rtas.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/hw/spapr_rtas.c b/hw/spapr_rtas.c index 3f090f5518..72268537a8 100644 --- a/hw/spapr_rtas.c +++ b/hw/spapr_rtas.c @@ -38,6 +38,58 @@ #define TOKEN_BASE 0x2000 #define TOKEN_MAX 0x100 +static void rtas_display_character(sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, + uint32_t nret, target_ulong rets) +{ + uint8_t c = rtas_ld(args, 0); + VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, 0); + + if (!sdev) { + rtas_st(rets, 0, -1); + } else { + vty_putchars(sdev, &c, sizeof(c)); + rtas_st(rets, 0, 0); + } +} + +static void rtas_get_time_of_day(sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, + uint32_t nret, target_ulong rets) +{ + struct tm tm; + + if (nret != 8) { + rtas_st(rets, 0, -3); + return; + } + + qemu_get_timedate(&tm, 0); + + rtas_st(rets, 0, 0); /* Success */ + rtas_st(rets, 1, tm.tm_year + 1900); + rtas_st(rets, 2, tm.tm_mon + 1); + rtas_st(rets, 3, tm.tm_mday); + rtas_st(rets, 4, tm.tm_hour); + rtas_st(rets, 5, tm.tm_min); + rtas_st(rets, 6, tm.tm_sec); + rtas_st(rets, 7, 0); /* we don't do nanoseconds */ +} + +static void rtas_power_off(sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, target_ulong args, + uint32_t nret, target_ulong rets) +{ + if (nargs != 2 || nret != 1) { + rtas_st(rets, 0, -3); + return; + } + qemu_system_shutdown_request(); + rtas_st(rets, 0, 0); +} + static struct rtas_call { const char *name; spapr_rtas_fn fn; @@ -59,6 +111,15 @@ target_ulong spapr_rtas_call(sPAPREnvironment *spapr, } } + /* HACK: Some Linux early debug code uses RTAS display-character, + * but assumes the token value is 0xa (which it is on some real + * machines) without looking it up in the device tree. This + * special case makes this work */ + if (token == 0xa) { + rtas_display_character(spapr, 0xa, nargs, args, nret, rets); + return H_SUCCESS; + } + hcall_dprintf("Unknown RTAS token 0x%x\n", token); rtas_st(rets, 0, -3); return H_PARAMETER; @@ -129,3 +190,11 @@ int spapr_rtas_device_tree_setup(void *fdt, target_phys_addr_t rtas_addr, } return 0; } + +static void register_core_rtas(void) +{ + spapr_rtas_register("display-character", rtas_display_character); + spapr_rtas_register("get-time-of-day", rtas_get_time_of_day); + spapr_rtas_register("power-off", rtas_power_off); +} +device_init(register_core_rtas); |