Merge remote branch 'origin/master' into pci

Conflicts:
	exec.c

1 files changed, 278 insertions, 0 deletions

diff --git a/hw/spapr_rtas.c b/hw/spapr_rtas.c
new file mode 100644
index 0000000000..16b65422b6
--- /dev/null
+++ b/hw/spapr_rtas.c
@@ -0,0 +1,278 @@
+/*
+ * 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.h"
+#include "qemu-char.h"
+#include "hw/qdev.h"
+#include "device_tree.h"
+
+#include "hw/spapr.h"
+#include "hw/spapr_vio.h"
+
+#include <libfdt.h>
+
+#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 void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr,
+                                         uint32_t token, uint32_t nargs,
+                                         target_ulong args,
+                                         uint32_t nret, target_ulong rets)
+{
+    target_ulong id;
+    CPUState *env;
+
+    if (nargs != 1 || nret != 2) {
+        rtas_st(rets, 0, -3);
+        return;
+    }
+
+    id = rtas_ld(args, 0);
+    for (env = first_cpu; env; env = env->next_cpu) {
+        if (env->cpu_index != id) {
+            continue;
+        }
+
+        if (env->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(sPAPREnvironment *spapr,
+                           uint32_t token, uint32_t nargs,
+                           target_ulong args,
+                           uint32_t nret, target_ulong rets)
+{
+    target_ulong id, start, r3;
+    CPUState *env;
+
+    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);
+
+    for (env = first_cpu; env; env = env->next_cpu) {
+        if (env->cpu_index != id) {
+            continue;
+        }
+
+        if (!env->halted) {
+            rtas_st(rets, 0, -1);
+            return;
+        }
+
+        env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
+        env->nip = start;
+        env->gpr[3] = r3;
+        env->halted = 0;
+
+        qemu_cpu_kick(env);
+
+        rtas_st(rets, 0, 0);
+        return;
+    }
+
+    /* Didn't find a matching cpu */
+    rtas_st(rets, 0, -3);
+}
+
+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(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(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(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;
+}
+
+void spapr_rtas_register(const char *name, spapr_rtas_fn fn)
+{
+    assert(rtas_next < (rtas_table + TOKEN_MAX));
+
+    rtas_next->name = name;
+    rtas_next->fn = fn;
+
+    rtas_next++;
+}
+
+int spapr_rtas_device_tree_setup(void *fdt, target_phys_addr_t rtas_addr,
+                                 target_phys_addr_t 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->fn) {
+            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 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);
+    spapr_rtas_register("query-cpu-stopped-state",
+                        rtas_query_cpu_stopped_state);
+    spapr_rtas_register("start-cpu", rtas_start_cpu);
+}
+device_init(register_core_rtas);