| /* |
| * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator |
| * |
| * Hypercall based emulated RTAS |
| * |
| * Copyright (c) 2010-2011 David Gibson, IBM Corporation. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| * |
| */ |
| #include "cpu.h" |
| #include "sysemu/sysemu.h" |
| #include "sysemu/char.h" |
| #include "hw/qdev.h" |
| #include "sysemu/device_tree.h" |
| |
| #include "hw/ppc/spapr.h" |
| #include "hw/ppc/spapr_vio.h" |
| |
| #include <libfdt.h> |
| |
| #define TOKEN_BASE 0x2000 |
| #define TOKEN_MAX 0x100 |
| |
| static void rtas_display_character(PowerPCCPU *cpu, 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 = vty_lookup(spapr, 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(PowerPCCPU *cpu, 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, spapr->rtc_offset); |
| |
| 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_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| uint32_t token, uint32_t nargs, |
| target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| struct tm tm; |
| |
| tm.tm_year = rtas_ld(args, 0) - 1900; |
| tm.tm_mon = rtas_ld(args, 1) - 1; |
| tm.tm_mday = rtas_ld(args, 2); |
| tm.tm_hour = rtas_ld(args, 3); |
| tm.tm_min = rtas_ld(args, 4); |
| tm.tm_sec = rtas_ld(args, 5); |
| |
| /* Just generate a monitor event for the change */ |
| rtc_change_mon_event(&tm); |
| spapr->rtc_offset = qemu_timedate_diff(&tm); |
| |
| rtas_st(rets, 0, 0); /* Success */ |
| } |
| |
| static void rtas_power_off(PowerPCCPU *cpu, 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 void rtas_system_reboot(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| uint32_t token, uint32_t nargs, |
| target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| if (nargs != 0 || nret != 1) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| qemu_system_reset_request(); |
| rtas_st(rets, 0, 0); |
| } |
| |
| static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_, |
| sPAPREnvironment *spapr, |
| uint32_t token, uint32_t nargs, |
| target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| target_ulong id; |
| CPUState *cpu; |
| |
| if (nargs != 1 || nret != 2) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| |
| id = rtas_ld(args, 0); |
| cpu = qemu_get_cpu(id); |
| if (cpu != NULL) { |
| if (cpu->halted) { |
| rtas_st(rets, 1, 0); |
| } else { |
| rtas_st(rets, 1, 2); |
| } |
| |
| rtas_st(rets, 0, 0); |
| return; |
| } |
| |
| /* Didn't find a matching cpu */ |
| rtas_st(rets, 0, -3); |
| } |
| |
| static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr, |
| uint32_t token, uint32_t nargs, |
| target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| target_ulong id, start, r3; |
| CPUState *cs; |
| |
| if (nargs != 3 || nret != 1) { |
| rtas_st(rets, 0, -3); |
| return; |
| } |
| |
| id = rtas_ld(args, 0); |
| start = rtas_ld(args, 1); |
| r3 = rtas_ld(args, 2); |
| |
| cs = qemu_get_cpu(id); |
| if (cs != NULL) { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| CPUPPCState *env = &cpu->env; |
| |
| if (!cs->halted) { |
| rtas_st(rets, 0, -1); |
| return; |
| } |
| |
| /* This will make sure qemu state is up to date with kvm, and |
| * mark it dirty so our changes get flushed back before the |
| * new cpu enters */ |
| kvm_cpu_synchronize_state(cs); |
| |
| env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); |
| env->nip = start; |
| env->gpr[3] = r3; |
| cs->halted = 0; |
| |
| qemu_cpu_kick(cs); |
| |
| rtas_st(rets, 0, 0); |
| return; |
| } |
| |
| /* Didn't find a matching cpu */ |
| rtas_st(rets, 0, -3); |
| } |
| |
| static void rtas_stop_self(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| uint32_t token, uint32_t nargs, |
| target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| CPUState *cs = CPU(cpu); |
| CPUPPCState *env = &cpu->env; |
| |
| cs->halted = 1; |
| cpu_exit(cs); |
| /* |
| * While stopping a CPU, the guest calls H_CPPR which |
| * effectively disables interrupts on XICS level. |
| * However decrementer interrupts in TCG can still |
| * wake the CPU up so here we disable interrupts in MSR |
| * as well. |
| * As rtas_start_cpu() resets the whole MSR anyway, there is |
| * no need to bother with specific bits, we just clear it. |
| */ |
| env->msr = 0; |
| } |
| |
| static struct rtas_call { |
| const char *name; |
| spapr_rtas_fn fn; |
| } rtas_table[TOKEN_MAX]; |
| |
| struct rtas_call *rtas_next = rtas_table; |
| |
| target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
| uint32_t token, uint32_t nargs, target_ulong args, |
| uint32_t nret, target_ulong rets) |
| { |
| if ((token >= TOKEN_BASE) |
| && ((token - TOKEN_BASE) < TOKEN_MAX)) { |
| struct rtas_call *call = rtas_table + (token - TOKEN_BASE); |
| |
| if (call->fn) { |
| call->fn(cpu, spapr, token, nargs, args, nret, rets); |
| return H_SUCCESS; |
| } |
| } |
| |
| /* 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(cpu, 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; |
| } |
| |
| int spapr_rtas_register(const char *name, spapr_rtas_fn fn) |
| { |
| int i; |
| |
| for (i = 0; i < (rtas_next - rtas_table); i++) { |
| if (strcmp(name, rtas_table[i].name) == 0) { |
| fprintf(stderr, "RTAS call \"%s\" registered twice\n", name); |
| exit(1); |
| } |
| } |
| |
| assert(rtas_next < (rtas_table + TOKEN_MAX)); |
| |
| rtas_next->name = name; |
| rtas_next->fn = fn; |
| |
| return (rtas_next++ - rtas_table) + TOKEN_BASE; |
| } |
| |
| int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr, |
| hwaddr rtas_size) |
| { |
| int ret; |
| int i; |
| |
| ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size); |
| if (ret < 0) { |
| fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } |
| |
| ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-base", |
| rtas_addr); |
| if (ret < 0) { |
| fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } |
| |
| ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-entry", |
| rtas_addr); |
| if (ret < 0) { |
| fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } |
| |
| ret = qemu_devtree_setprop_cell(fdt, "/rtas", "rtas-size", |
| rtas_size); |
| if (ret < 0) { |
| fprintf(stderr, "Couldn't add rtas-size property: %s\n", |
| fdt_strerror(ret)); |
| return ret; |
| } |
| |
| for (i = 0; i < TOKEN_MAX; i++) { |
| struct rtas_call *call = &rtas_table[i]; |
| |
| if (!call->name) { |
| continue; |
| } |
| |
| ret = qemu_devtree_setprop_cell(fdt, "/rtas", call->name, |
| i + TOKEN_BASE); |
| if (ret < 0) { |
| fprintf(stderr, "Couldn't add rtas token for %s: %s\n", |
| call->name, fdt_strerror(ret)); |
| return ret; |
| } |
| |
| } |
| return 0; |
| } |
| |
| static void core_rtas_register_types(void) |
| { |
| spapr_rtas_register("display-character", rtas_display_character); |
| spapr_rtas_register("get-time-of-day", rtas_get_time_of_day); |
| spapr_rtas_register("set-time-of-day", rtas_set_time_of_day); |
| spapr_rtas_register("power-off", rtas_power_off); |
| spapr_rtas_register("system-reboot", rtas_system_reboot); |
| spapr_rtas_register("query-cpu-stopped-state", |
| rtas_query_cpu_stopped_state); |
| spapr_rtas_register("start-cpu", rtas_start_cpu); |
| spapr_rtas_register("stop-self", rtas_stop_self); |
| } |
| |
| type_init(core_rtas_register_types) |
