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https://github.com/xemu-project/xemu.git
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55e5c28502
Note that target-alpha accesses this field from TCG, now using a negative offset. Therefore the field is placed last in CPUState. Pass PowerPCCPU to [kvm]ppc_fixup_cpu() to facilitate this change. Move common parts of mips cpu_state_reset() to mips_cpu_reset(). Acked-by: Richard Henderson <rth@twiddle.net> (for alpha) [AF: Rebased onto ppc CPU subclasses and openpic changes] Signed-off-by: Andreas Färber <afaerber@suse.de>
335 lines
9.6 KiB
C
335 lines
9.6 KiB
C
/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* Hypercall based emulated RTAS
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*
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* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "cpu.h"
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#include "sysemu/sysemu.h"
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#include "char/char.h"
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#include "hw/qdev.h"
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#include "sysemu/device_tree.h"
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#include "hw/spapr.h"
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#include "hw/spapr_vio.h"
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#include <libfdt.h>
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#define TOKEN_BASE 0x2000
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#define TOKEN_MAX 0x100
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static void rtas_display_character(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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uint8_t c = rtas_ld(args, 0);
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VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
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if (!sdev) {
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rtas_st(rets, 0, -1);
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} else {
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vty_putchars(sdev, &c, sizeof(c));
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rtas_st(rets, 0, 0);
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}
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}
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static void rtas_get_time_of_day(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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struct tm tm;
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if (nret != 8) {
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rtas_st(rets, 0, -3);
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return;
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}
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qemu_get_timedate(&tm, spapr->rtc_offset);
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rtas_st(rets, 0, 0); /* Success */
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rtas_st(rets, 1, tm.tm_year + 1900);
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rtas_st(rets, 2, tm.tm_mon + 1);
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rtas_st(rets, 3, tm.tm_mday);
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rtas_st(rets, 4, tm.tm_hour);
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rtas_st(rets, 5, tm.tm_min);
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rtas_st(rets, 6, tm.tm_sec);
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rtas_st(rets, 7, 0); /* we don't do nanoseconds */
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}
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static void rtas_set_time_of_day(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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struct tm tm;
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tm.tm_year = rtas_ld(args, 0) - 1900;
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tm.tm_mon = rtas_ld(args, 1) - 1;
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tm.tm_mday = rtas_ld(args, 2);
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tm.tm_hour = rtas_ld(args, 3);
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tm.tm_min = rtas_ld(args, 4);
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tm.tm_sec = rtas_ld(args, 5);
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/* Just generate a monitor event for the change */
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rtc_change_mon_event(&tm);
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spapr->rtc_offset = qemu_timedate_diff(&tm);
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rtas_st(rets, 0, 0); /* Success */
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}
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static void rtas_power_off(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs, target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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if (nargs != 2 || nret != 1) {
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rtas_st(rets, 0, -3);
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return;
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}
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qemu_system_shutdown_request();
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rtas_st(rets, 0, 0);
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}
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static void rtas_system_reboot(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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if (nargs != 0 || nret != 1) {
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rtas_st(rets, 0, -3);
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return;
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}
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qemu_system_reset_request();
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rtas_st(rets, 0, 0);
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}
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static void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong id;
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CPUPPCState *env;
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CPUState *cpu;
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if (nargs != 1 || nret != 2) {
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rtas_st(rets, 0, -3);
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return;
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}
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id = rtas_ld(args, 0);
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for (env = first_cpu; env; env = env->next_cpu) {
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cpu = CPU(ppc_env_get_cpu(env));
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if (cpu->cpu_index != id) {
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continue;
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}
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if (env->halted) {
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rtas_st(rets, 1, 0);
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} else {
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rtas_st(rets, 1, 2);
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}
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rtas_st(rets, 0, 0);
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return;
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}
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/* Didn't find a matching cpu */
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rtas_st(rets, 0, -3);
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}
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static void rtas_start_cpu(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong id, start, r3;
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CPUState *cpu;
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CPUPPCState *env;
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if (nargs != 3 || nret != 1) {
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rtas_st(rets, 0, -3);
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return;
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}
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id = rtas_ld(args, 0);
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start = rtas_ld(args, 1);
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r3 = rtas_ld(args, 2);
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for (env = first_cpu; env; env = env->next_cpu) {
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cpu = CPU(ppc_env_get_cpu(env));
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if (cpu->cpu_index != id) {
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continue;
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}
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if (!env->halted) {
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rtas_st(rets, 0, -1);
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return;
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}
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/* This will make sure qemu state is up to date with kvm, and
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* mark it dirty so our changes get flushed back before the
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* new cpu enters */
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kvm_cpu_synchronize_state(env);
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env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
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env->nip = start;
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env->gpr[3] = r3;
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env->halted = 0;
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qemu_cpu_kick(cpu);
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rtas_st(rets, 0, 0);
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return;
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}
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/* Didn't find a matching cpu */
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rtas_st(rets, 0, -3);
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}
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static struct rtas_call {
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const char *name;
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spapr_rtas_fn fn;
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} rtas_table[TOKEN_MAX];
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struct rtas_call *rtas_next = rtas_table;
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target_ulong spapr_rtas_call(sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs, target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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if ((token >= TOKEN_BASE)
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&& ((token - TOKEN_BASE) < TOKEN_MAX)) {
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struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
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if (call->fn) {
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call->fn(spapr, token, nargs, args, nret, rets);
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return H_SUCCESS;
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}
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}
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/* HACK: Some Linux early debug code uses RTAS display-character,
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* but assumes the token value is 0xa (which it is on some real
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* machines) without looking it up in the device tree. This
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* special case makes this work */
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if (token == 0xa) {
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rtas_display_character(spapr, 0xa, nargs, args, nret, rets);
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return H_SUCCESS;
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}
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hcall_dprintf("Unknown RTAS token 0x%x\n", token);
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rtas_st(rets, 0, -3);
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return H_PARAMETER;
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}
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int spapr_rtas_register(const char *name, spapr_rtas_fn fn)
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{
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int i;
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for (i = 0; i < (rtas_next - rtas_table); i++) {
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if (strcmp(name, rtas_table[i].name) == 0) {
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fprintf(stderr, "RTAS call \"%s\" registered twice\n", name);
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exit(1);
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}
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}
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assert(rtas_next < (rtas_table + TOKEN_MAX));
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rtas_next->name = name;
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rtas_next->fn = fn;
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return (rtas_next++ - rtas_table) + TOKEN_BASE;
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}
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int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
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hwaddr rtas_size)
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{
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int ret;
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int i;
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ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-base",
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rtas_addr);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
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rtas_addr);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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ret = qemu_devtree_setprop_cell(fdt, "/rtas", "rtas-size",
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rtas_size);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add rtas-size property: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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for (i = 0; i < TOKEN_MAX; i++) {
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struct rtas_call *call = &rtas_table[i];
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if (!call->name) {
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continue;
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}
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ret = qemu_devtree_setprop_cell(fdt, "/rtas", call->name,
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i + TOKEN_BASE);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
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call->name, fdt_strerror(ret));
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return ret;
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}
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}
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return 0;
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}
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static void core_rtas_register_types(void)
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{
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spapr_rtas_register("display-character", rtas_display_character);
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spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
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spapr_rtas_register("set-time-of-day", rtas_set_time_of_day);
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spapr_rtas_register("power-off", rtas_power_off);
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spapr_rtas_register("system-reboot", rtas_system_reboot);
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spapr_rtas_register("query-cpu-stopped-state",
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rtas_query_cpu_stopped_state);
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spapr_rtas_register("start-cpu", rtas_start_cpu);
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}
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type_init(core_rtas_register_types)
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