[mirror_qemu.git] / hw / ppc / spapr_rtas.c

/*
 * 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, RTAS_OUT_HW_ERROR);
    } else {
        vty_putchars(sdev, &c, sizeof(c));
        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
    }
}

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, RTAS_OUT_PARAM_ERROR);
        return;
    }

    qemu_get_timedate(&tm, spapr->rtc_offset);

    rtas_st(rets, 0, RTAS_OUT_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, RTAS_OUT_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, RTAS_OUT_PARAM_ERROR);
        return;
    }
    qemu_system_shutdown_request();
    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}

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, RTAS_OUT_PARAM_ERROR);
        return;
    }
    qemu_system_reset_request();
    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}

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, RTAS_OUT_PARAM_ERROR);
        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, RTAS_OUT_SUCCESS);
        return;
    }

    /* Didn't find a matching cpu */
    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}

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, RTAS_OUT_PARAM_ERROR);
        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, RTAS_OUT_HW_ERROR);
            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, RTAS_OUT_SUCCESS);
        return;
    }

    /* Didn't find a matching cpu */
    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}

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;
}

#define DIAGNOSTICS_RUN_MODE        42

static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
                                          sPAPREnvironment *spapr,
                                          uint32_t token, uint32_t nargs,
                                          target_ulong args,
                                          uint32_t nret, target_ulong rets)
{
    target_ulong parameter = rtas_ld(args, 0);
    target_ulong buffer = rtas_ld(args, 1);
    target_ulong length = rtas_ld(args, 2);
    target_ulong ret = RTAS_OUT_NOT_SUPPORTED;

    switch (parameter) {
    case DIAGNOSTICS_RUN_MODE:
        if (length == 1) {
            rtas_st(buffer, 0, 0);
            ret = RTAS_OUT_SUCCESS;
        }
        break;
    }

    rtas_st(rets, 0, ret);
}

static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
                                          sPAPREnvironment *spapr,
                                          uint32_t token, uint32_t nargs,
                                          target_ulong args,
                                          uint32_t nret, target_ulong rets)
{
    target_ulong parameter = rtas_ld(args, 0);
    target_ulong ret = RTAS_OUT_NOT_SUPPORTED;

    switch (parameter) {
    case DIAGNOSTICS_RUN_MODE:
        ret = RTAS_OUT_NOT_AUTHORIZED;
        break;
    }

    rtas_st(rets, 0, ret);
}

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, RTAS_OUT_PARAM_ERROR);
    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);
    spapr_rtas_register("ibm,get-system-parameter",
                        rtas_ibm_get_system_parameter);
    spapr_rtas_register("ibm,set-system-parameter",
                        rtas_ibm_set_system_parameter);
}

type_init(core_rtas_register_types)
Commit	Line	Data
39ac8455 DG	1	/*
	2	* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
	3	*
	4	* Hypercall based emulated RTAS
	5	*
	6	* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
	7	*
	8	* Permission is hereby granted, free of charge, to any person obtaining a copy
	9	* of this software and associated documentation files (the "Software"), to deal
	10	* in the Software without restriction, including without limitation the rights
	11	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	12	* copies of the Software, and to permit persons to whom the Software is
	13	* furnished to do so, subject to the following conditions:
	14	*
	15	* The above copyright notice and this permission notice shall be included in
	16	* all copies or substantial portions of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	21	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	22	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	23	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	24	* THE SOFTWARE.
	25	*
	26	*/
	27	#include "cpu.h"
9c17d615	28	#include "sysemu/sysemu.h"
dccfcd0e	29	#include "sysemu/char.h"
39ac8455	30	#include "hw/qdev.h"
9c17d615	31	#include "sysemu/device_tree.h"
39ac8455	32
0d09e41a PB	33	#include "hw/ppc/spapr.h"
0d09e41a PB	34	#include "hw/ppc/spapr_vio.h"
39ac8455 DG	35
	36	#include <libfdt.h>
	37
	38	#define TOKEN_BASE 0x2000
	39	#define TOKEN_MAX 0x100
	40
210b580b	41	static void rtas_display_character(PowerPCCPU cpu, sPAPREnvironment spapr,
821303f5 DG	42	uint32_t token, uint32_t nargs,
	43	target_ulong args,
	44	uint32_t nret, target_ulong rets)
	45	{
	46	uint8_t c = rtas_ld(args, 0);
5f2e2ba2	47	VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
821303f5 DG	48
821303f5 DG	49	if (!sdev) {
a64d325d	50	rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
821303f5 DG	51	} else {
821303f5 DG	52	vty_putchars(sdev, &c, sizeof(c));
a64d325d	53	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
821303f5 DG	54	}
	55	}
	56
210b580b	57	static void rtas_get_time_of_day(PowerPCCPU cpu, sPAPREnvironment spapr,
821303f5 DG	58	uint32_t token, uint32_t nargs,
	59	target_ulong args,
	60	uint32_t nret, target_ulong rets)
	61	{
	62	struct tm tm;
	63
	64	if (nret != 8) {
a64d325d	65	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
821303f5 DG	66	return;
	67	}
	68
ac26f8c3	69	qemu_get_timedate(&tm, spapr->rtc_offset);
821303f5	70
a64d325d	71	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
821303f5 DG	72	rtas_st(rets, 1, tm.tm_year + 1900);
	73	rtas_st(rets, 2, tm.tm_mon + 1);
	74	rtas_st(rets, 3, tm.tm_mday);
	75	rtas_st(rets, 4, tm.tm_hour);
	76	rtas_st(rets, 5, tm.tm_min);
	77	rtas_st(rets, 6, tm.tm_sec);
	78	rtas_st(rets, 7, 0); /* we don't do nanoseconds */
	79	}
	80
210b580b	81	static void rtas_set_time_of_day(PowerPCCPU cpu, sPAPREnvironment spapr,
ac26f8c3 BL	82	uint32_t token, uint32_t nargs,
	83	target_ulong args,
	84	uint32_t nret, target_ulong rets)
	85	{
	86	struct tm tm;
	87
	88	tm.tm_year = rtas_ld(args, 0) - 1900;
	89	tm.tm_mon = rtas_ld(args, 1) - 1;
	90	tm.tm_mday = rtas_ld(args, 2);
	91	tm.tm_hour = rtas_ld(args, 3);
	92	tm.tm_min = rtas_ld(args, 4);
	93	tm.tm_sec = rtas_ld(args, 5);
	94
	95	/* Just generate a monitor event for the change */
	96	rtc_change_mon_event(&tm);
	97	spapr->rtc_offset = qemu_timedate_diff(&tm);
	98
a64d325d	99	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
ac26f8c3 BL	100	}
ac26f8c3 BL	101
210b580b	102	static void rtas_power_off(PowerPCCPU cpu, sPAPREnvironment spapr,
821303f5 DG	103	uint32_t token, uint32_t nargs, target_ulong args,
	104	uint32_t nret, target_ulong rets)
	105	{
	106	if (nargs != 2 \|\| nret != 1) {
a64d325d	107	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
821303f5 DG	108	return;
	109	}
	110	qemu_system_shutdown_request();
a64d325d	111	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
821303f5 DG	112	}
821303f5 DG	113
210b580b	114	static void rtas_system_reboot(PowerPCCPU cpu, sPAPREnvironment spapr,
c821a43c DG	115	uint32_t token, uint32_t nargs,
	116	target_ulong args,
	117	uint32_t nret, target_ulong rets)
	118	{
	119	if (nargs != 0 \|\| nret != 1) {
a64d325d	120	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
c821a43c DG	121	return;
	122	}
	123	qemu_system_reset_request();
a64d325d	124	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
c821a43c DG	125	}
c821a43c DG	126
210b580b AL	127	static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
210b580b AL	128	sPAPREnvironment *spapr,
a9f8ad8f DG	129	uint32_t token, uint32_t nargs,
	130	target_ulong args,
	131	uint32_t nret, target_ulong rets)
	132	{
	133	target_ulong id;
55e5c285	134	CPUState *cpu;
a9f8ad8f DG	135
a9f8ad8f DG	136	if (nargs != 1 \|\| nret != 2) {
a64d325d	137	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
a9f8ad8f DG	138	return;
	139	}
	140
	141	id = rtas_ld(args, 0);
05318a85 AF	142	cpu = qemu_get_cpu(id);
05318a85 AF	143	if (cpu != NULL) {
259186a7	144	if (cpu->halted) {
a9f8ad8f DG	145	rtas_st(rets, 1, 0);
	146	} else {
	147	rtas_st(rets, 1, 2);
	148	}
	149
a64d325d	150	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
a9f8ad8f DG	151	return;
	152	}
	153
	154	/* Didn't find a matching cpu */
a64d325d	155	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
a9f8ad8f DG	156	}
a9f8ad8f DG	157
210b580b	158	static void rtas_start_cpu(PowerPCCPU cpu_, sPAPREnvironment spapr,
a9f8ad8f DG	159	uint32_t token, uint32_t nargs,
	160	target_ulong args,
	161	uint32_t nret, target_ulong rets)
	162	{
	163	target_ulong id, start, r3;
c67e216b	164	CPUState *cs;
a9f8ad8f DG	165
a9f8ad8f DG	166	if (nargs != 3 \|\| nret != 1) {
a64d325d	167	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
a9f8ad8f DG	168	return;
	169	}
	170
	171	id = rtas_ld(args, 0);
	172	start = rtas_ld(args, 1);
	173	r3 = rtas_ld(args, 2);
	174
c67e216b AF	175	cs = qemu_get_cpu(id);
	176	if (cs != NULL) {
	177	PowerPCCPU *cpu = POWERPC_CPU(cs);
	178	CPUPPCState *env = &cpu->env;
a9f8ad8f	179
c67e216b	180	if (!cs->halted) {
a64d325d	181	rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
a9f8ad8f DG	182	return;
	183	}
	184
048706d9 DG	185	/* This will make sure qemu state is up to date with kvm, and
	186	* mark it dirty so our changes get flushed back before the
	187	* new cpu enters */
dd1750d7	188	kvm_cpu_synchronize_state(cs);
048706d9	189
a9f8ad8f DG	190	env->msr = (1ULL << MSR_SF) \| (1ULL << MSR_ME);
	191	env->nip = start;
	192	env->gpr[3] = r3;
c67e216b	193	cs->halted = 0;
a9f8ad8f	194
c67e216b	195	qemu_cpu_kick(cs);
a9f8ad8f	196
a64d325d	197	rtas_st(rets, 0, RTAS_OUT_SUCCESS);
a9f8ad8f DG	198	return;
	199	}
	200
	201	/* Didn't find a matching cpu */
a64d325d	202	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
a9f8ad8f DG	203	}
a9f8ad8f DG	204
59760f2d AK	205	static void rtas_stop_self(PowerPCCPU cpu, sPAPREnvironment spapr,
	206	uint32_t token, uint32_t nargs,
	207	target_ulong args,
	208	uint32_t nret, target_ulong rets)
	209	{
	210	CPUState *cs = CPU(cpu);
	211	CPUPPCState *env = &cpu->env;
	212
	213	cs->halted = 1;
	214	cpu_exit(cs);
	215	/*
	216	* While stopping a CPU, the guest calls H_CPPR which
	217	* effectively disables interrupts on XICS level.
	218	* However decrementer interrupts in TCG can still
	219	* wake the CPU up so here we disable interrupts in MSR
	220	* as well.
	221	* As rtas_start_cpu() resets the whole MSR anyway, there is
	222	* no need to bother with specific bits, we just clear it.
	223	*/
	224	env->msr = 0;
	225	}
	226
3ada6b11 AK	227	#define DIAGNOSTICS_RUN_MODE 42
	228
	229	static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
	230	sPAPREnvironment *spapr,
	231	uint32_t token, uint32_t nargs,
	232	target_ulong args,
	233	uint32_t nret, target_ulong rets)
	234	{
	235	target_ulong parameter = rtas_ld(args, 0);
	236	target_ulong buffer = rtas_ld(args, 1);
	237	target_ulong length = rtas_ld(args, 2);
	238	target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
	239
	240	switch (parameter) {
	241	case DIAGNOSTICS_RUN_MODE:
	242	if (length == 1) {
	243	rtas_st(buffer, 0, 0);
	244	ret = RTAS_OUT_SUCCESS;
	245	}
	246	break;
	247	}
	248
	249	rtas_st(rets, 0, ret);
	250	}
	251
	252	static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
	253	sPAPREnvironment *spapr,
	254	uint32_t token, uint32_t nargs,
	255	target_ulong args,
	256	uint32_t nret, target_ulong rets)
	257	{
	258	target_ulong parameter = rtas_ld(args, 0);
	259	target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
	260
	261	switch (parameter) {
	262	case DIAGNOSTICS_RUN_MODE:
	263	ret = RTAS_OUT_NOT_AUTHORIZED;
	264	break;
	265	}
	266
	267	rtas_st(rets, 0, ret);
	268	}
	269
39ac8455 DG	270	static struct rtas_call {
	271	const char *name;
	272	spapr_rtas_fn fn;
	273	} rtas_table[TOKEN_MAX];
	274
	275	struct rtas_call *rtas_next = rtas_table;
	276
210b580b	277	target_ulong spapr_rtas_call(PowerPCCPU cpu, sPAPREnvironment spapr,
39ac8455 DG	278	uint32_t token, uint32_t nargs, target_ulong args,
	279	uint32_t nret, target_ulong rets)
	280	{
	281	if ((token >= TOKEN_BASE)
	282	&& ((token - TOKEN_BASE) < TOKEN_MAX)) {
	283	struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
	284
	285	if (call->fn) {
210b580b	286	call->fn(cpu, spapr, token, nargs, args, nret, rets);
39ac8455 DG	287	return H_SUCCESS;
	288	}
	289	}
	290
821303f5 DG	291	/* HACK: Some Linux early debug code uses RTAS display-character,
	292	* but assumes the token value is 0xa (which it is on some real
	293	* machines) without looking it up in the device tree. This
	294	* special case makes this work */
	295	if (token == 0xa) {
210b580b	296	rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
821303f5 DG	297	return H_SUCCESS;
	298	}
	299
39ac8455	300	hcall_dprintf("Unknown RTAS token 0x%x\n", token);
a64d325d	301	rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
39ac8455 DG	302	return H_PARAMETER;
	303	}
	304
4aac82c3	305	int spapr_rtas_register(const char *name, spapr_rtas_fn fn)
39ac8455	306	{
c89d5299 DG	307	int i;
	308
	309	for (i = 0; i < (rtas_next - rtas_table); i++) {
	310	if (strcmp(name, rtas_table[i].name) == 0) {
	311	fprintf(stderr, "RTAS call \"%s\" registered twice\n", name);
	312	exit(1);
	313	}
	314	}
	315
39ac8455 DG	316	assert(rtas_next < (rtas_table + TOKEN_MAX));
	317
	318	rtas_next->name = name;
	319	rtas_next->fn = fn;
	320
4aac82c3	321	return (rtas_next++ - rtas_table) + TOKEN_BASE;
39ac8455 DG	322	}
39ac8455 DG	323
a8170e5e AK	324	int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
a8170e5e AK	325	hwaddr rtas_size)
39ac8455 DG	326	{
	327	int ret;
	328	int i;
	329
	330	ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
	331	if (ret < 0) {
	332	fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
	333	fdt_strerror(ret));
	334	return ret;
	335	}
	336
	337	ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-base",
	338	rtas_addr);
	339	if (ret < 0) {
	340	fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
	341	fdt_strerror(ret));
	342	return ret;
	343	}
	344
	345	ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
	346	rtas_addr);
	347	if (ret < 0) {
	348	fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
	349	fdt_strerror(ret));
	350	return ret;
	351	}
	352
	353	ret = qemu_devtree_setprop_cell(fdt, "/rtas", "rtas-size",
	354	rtas_size);
	355	if (ret < 0) {
	356	fprintf(stderr, "Couldn't add rtas-size property: %s\n",
	357	fdt_strerror(ret));
	358	return ret;
	359	}
	360
	361	for (i = 0; i < TOKEN_MAX; i++) {
	362	struct rtas_call *call = &rtas_table[i];
	363
d36b66f7	364	if (!call->name) {
39ac8455 DG	365	continue;
	366	}
	367
	368	ret = qemu_devtree_setprop_cell(fdt, "/rtas", call->name,
	369	i + TOKEN_BASE);
	370	if (ret < 0) {
	371	fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
	372	call->name, fdt_strerror(ret));
	373	return ret;
	374	}
	375
	376	}
	377	return 0;
	378	}
821303f5	379
83f7d43a	380	static void core_rtas_register_types(void)
821303f5 DG	381	{
	382	spapr_rtas_register("display-character", rtas_display_character);
	383	spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
ac26f8c3	384	spapr_rtas_register("set-time-of-day", rtas_set_time_of_day);
821303f5	385	spapr_rtas_register("power-off", rtas_power_off);
c821a43c	386	spapr_rtas_register("system-reboot", rtas_system_reboot);
a9f8ad8f DG	387	spapr_rtas_register("query-cpu-stopped-state",
	388	rtas_query_cpu_stopped_state);
	389	spapr_rtas_register("start-cpu", rtas_start_cpu);
59760f2d	390	spapr_rtas_register("stop-self", rtas_stop_self);
3ada6b11 AK	391	spapr_rtas_register("ibm,get-system-parameter",
	392	rtas_ibm_get_system_parameter);
	393	spapr_rtas_register("ibm,set-system-parameter",
	394	rtas_ibm_set_system_parameter);
821303f5	395	}
83f7d43a AF	396
83f7d43a AF	397	type_init(core_rtas_register_types)