target-arm: Add QOM subclasses for each ARM cpu implementation

Register subclasses for each ARM CPU implementation.

Let arm_cpu_list() enumerate CPU subclasses in alphabetical order,
except for special value "any".

Replace cpu_arm_find_by_name()'s string -> CPUID lookup by storing the
CPUID (aka MIDR, Main ID Register) value in the class.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 282 insertions, 65 deletions

diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
index 42d2a6b..a4bcb31 100644
--- a/target-arm/cpu-qom.h
+++ b/target-arm/cpu-qom.h
@@ -58,6 +58,18 @@ typedef struct ARMCPU {
     /*< public >*/
 
     CPUARMState env;
+
+    /* The instance init functions for implementation-specific subclasses
+     * set these fields to specify the implementation-dependent values of
+     * various constant registers and reset values of non-constant
+     * registers.
+     * Some of these might become QOM properties eventually.
+     * Field names match the official register names as defined in the
+     * ARMv7AR ARM Architecture Reference Manual. A reset_ prefix
+     * is used for reset values of non-constant registers; no reset_
+     * prefix means a constant register.
+     */
+    uint32_t midr;
 } ARMCPU;
 
 static inline ARMCPU *arm_env_get_cpu(CPUARMState *env)
diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index c3ed45b..6d4f8fe 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -34,6 +34,211 @@ static void arm_cpu_reset(CPUState *s)
     cpu_state_reset(&cpu->env);
 }
 
+static void arm_cpu_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+
+    cpu_exec_init(&cpu->env);
+}
+
+/* CPU models */
+
+static void arm926_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM926;
+}
+
+static void arm946_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM946;
+}
+
+static void arm1026_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM1026;
+}
+
+static void arm1136_r2_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM1136_R2;
+}
+
+static void arm1136_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM1136;
+}
+
+static void arm1176_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM1176;
+}
+
+static void arm11mpcore_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ARM11MPCORE;
+}
+
+static void cortex_m3_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_CORTEXM3;
+}
+
+static void cortex_a8_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_CORTEXA8;
+}
+
+static void cortex_a9_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_CORTEXA9;
+}
+
+static void cortex_a15_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_CORTEXA15;
+}
+
+static void ti925t_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_TI925T;
+}
+
+static void sa1100_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_SA1100;
+}
+
+static void sa1110_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_SA1110;
+}
+
+static void pxa250_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA250;
+}
+
+static void pxa255_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA255;
+}
+
+static void pxa260_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA260;
+}
+
+static void pxa261_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA261;
+}
+
+static void pxa262_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA262;
+}
+
+static void pxa270a0_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA270_A0;
+}
+
+static void pxa270a1_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA270_A1;
+}
+
+static void pxa270b0_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA270_B0;
+}
+
+static void pxa270b1_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA270_B1;
+}
+
+static void pxa270c0_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA270_C0;
+}
+
+static void pxa270c5_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_PXA270_C5;
+}
+
+static void arm_any_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    cpu->midr = ARM_CPUID_ANY;
+}
+
+typedef struct ARMCPUInfo {
+    const char *name;
+    void (*initfn)(Object *obj);
+} ARMCPUInfo;
+
+static const ARMCPUInfo arm_cpus[] = {
+    { .name = "arm926",      .initfn = arm926_initfn },
+    { .name = "arm946",      .initfn = arm946_initfn },
+    { .name = "arm1026",     .initfn = arm1026_initfn },
+    /* What QEMU calls "arm1136-r2" is actually the 1136 r0p2, i.e. an
+     * older core than plain "arm1136". In particular this does not
+     * have the v6K features.
+     */
+    { .name = "arm1136-r2",  .initfn = arm1136_r2_initfn },
+    { .name = "arm1136",     .initfn = arm1136_initfn },
+    { .name = "arm1176",     .initfn = arm1176_initfn },
+    { .name = "arm11mpcore", .initfn = arm11mpcore_initfn },
+    { .name = "cortex-m3",   .initfn = cortex_m3_initfn },
+    { .name = "cortex-a8",   .initfn = cortex_a8_initfn },
+    { .name = "cortex-a9",   .initfn = cortex_a9_initfn },
+    { .name = "cortex-a15",  .initfn = cortex_a15_initfn },
+    { .name = "ti925t",      .initfn = ti925t_initfn },
+    { .name = "sa1100",      .initfn = sa1100_initfn },
+    { .name = "sa1110",      .initfn = sa1110_initfn },
+    { .name = "pxa250",      .initfn = pxa250_initfn },
+    { .name = "pxa255",      .initfn = pxa255_initfn },
+    { .name = "pxa260",      .initfn = pxa260_initfn },
+    { .name = "pxa261",      .initfn = pxa261_initfn },
+    { .name = "pxa262",      .initfn = pxa262_initfn },
+    /* "pxa270" is an alias for "pxa270-a0" */
+    { .name = "pxa270",      .initfn = pxa270a0_initfn },
+    { .name = "pxa270-a0",   .initfn = pxa270a0_initfn },
+    { .name = "pxa270-a1",   .initfn = pxa270a1_initfn },
+    { .name = "pxa270-b0",   .initfn = pxa270b0_initfn },
+    { .name = "pxa270-b1",   .initfn = pxa270b1_initfn },
+    { .name = "pxa270-c0",   .initfn = pxa270c0_initfn },
+    { .name = "pxa270-c5",   .initfn = pxa270c5_initfn },
+    { .name = "any",         .initfn = arm_any_initfn },
+};
+
 static void arm_cpu_class_init(ObjectClass *oc, void *data)
 {
     ARMCPUClass *acc = ARM_CPU_CLASS(oc);
@@ -43,18 +248,37 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
     cc->reset = arm_cpu_reset;
 }
 
+static void cpu_register(const ARMCPUInfo *info)
+{
+    TypeInfo type_info = {
+        .name = info->name,
+        .parent = TYPE_ARM_CPU,
+        .instance_size = sizeof(ARMCPU),
+        .instance_init = info->initfn,
+        .class_size = sizeof(ARMCPUClass),
+    };
+
+    type_register_static(&type_info);
+}
+
 static const TypeInfo arm_cpu_type_info = {
     .name = TYPE_ARM_CPU,
     .parent = TYPE_CPU,
     .instance_size = sizeof(ARMCPU),
-    .abstract = false,
+    .instance_init = arm_cpu_initfn,
+    .abstract = true,
     .class_size = sizeof(ARMCPUClass),
     .class_init = arm_cpu_class_init,
 };
 
 static void arm_cpu_register_types(void)
 {
+    int i;
+
     type_register_static(&arm_cpu_type_info);
+    for (i = 0; i < ARRAY_SIZE(arm_cpus); i++) {
+        cpu_register(&arm_cpus[i]);
+    }
 }
 
 type_init(arm_cpu_register_types)
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 28f127b..afcd68c 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -46,8 +46,6 @@ static uint32_t arm1176_cp15_c0_c1[8] =
 static uint32_t arm1176_cp15_c0_c2[8] =
 { 0x0140011, 0x12002111, 0x11231121, 0x01102131, 0x01141, 0, 0, 0 };
 
-static uint32_t cpu_arm_find_by_name(const char *name);
-
 static inline void set_feature(CPUARMState *env, int feature)
 {
     env->features |= 1u << feature;
@@ -55,7 +53,6 @@ static inline void set_feature(CPUARMState *env, int feature)
 
 static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
 {
-    env->cp15.c0_cpuid = id;
     switch (id) {
     case ARM_CPUID_ARM926:
         set_feature(env, ARM_FEATURE_V5);
@@ -201,7 +198,6 @@ static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
     case ARM_CPUID_TI925T:
         set_feature(env, ARM_FEATURE_V4T);
         set_feature(env, ARM_FEATURE_OMAPCP);
-        env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring.  */
         env->cp15.c0_cachetype = 0x5109149;
         env->cp15.c1_sys = 0x00000070;
         env->cp15.c15_i_max = 0x000;
@@ -287,18 +283,20 @@ void cpu_state_reset(CPUARMState *env)
 {
     uint32_t id;
     uint32_t tmp = 0;
+    ARMCPU *cpu = arm_env_get_cpu(env);
 
     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
         qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
         log_cpu_state(env, 0);
     }
 
-    id = env->cp15.c0_cpuid;
+    id = cpu->midr;
     tmp = env->cp15.c15_config_base_address;
     memset(env, 0, offsetof(CPUARMState, breakpoints));
     if (id)
         cpu_reset_model_id(env, id);
     env->cp15.c15_config_base_address = tmp;
+    env->cp15.c0_cpuid = cpu->midr;
 #if defined (CONFIG_USER_ONLY)
     env->uncached_cpsr = ARM_CPU_MODE_USR;
     /* For user mode we must enable access to coprocessors */
@@ -407,22 +405,20 @@ CPUARMState *cpu_arm_init(const char *cpu_model)
 {
     ARMCPU *cpu;
     CPUARMState *env;
-    uint32_t id;
     static int inited = 0;
 
-    id = cpu_arm_find_by_name(cpu_model);
-    if (id == 0)
+    if (!object_class_by_name(cpu_model)) {
         return NULL;
-    cpu = ARM_CPU(object_new(TYPE_ARM_CPU));
+    }
+    cpu = ARM_CPU(object_new(cpu_model));
     env = &cpu->env;
-    cpu_exec_init(env);
+    env->cpu_model_str = cpu_model;
+
     if (tcg_enabled() && !inited) {
         inited = 1;
         arm_translate_init();
     }
 
-    env->cpu_model_str = cpu_model;
-    env->cp15.c0_cpuid = id;
     cpu_state_reset(env);
     if (arm_feature(env, ARM_FEATURE_NEON)) {
         gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
@@ -438,66 +434,51 @@ CPUARMState *cpu_arm_init(const char *cpu_model)
     return env;
 }
 
-struct arm_cpu_t {
-    uint32_t id;
-    const char *name;
-};
-
-static const struct arm_cpu_t arm_cpu_names[] = {
-    { ARM_CPUID_ARM926, "arm926"},
-    { ARM_CPUID_ARM946, "arm946"},
-    { ARM_CPUID_ARM1026, "arm1026"},
-    { ARM_CPUID_ARM1136, "arm1136"},
-    { ARM_CPUID_ARM1136_R2, "arm1136-r2"},
-    { ARM_CPUID_ARM1176, "arm1176"},
-    { ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
-    { ARM_CPUID_CORTEXM3, "cortex-m3"},
-    { ARM_CPUID_CORTEXA8, "cortex-a8"},
-    { ARM_CPUID_CORTEXA9, "cortex-a9"},
-    { ARM_CPUID_CORTEXA15, "cortex-a15" },
-    { ARM_CPUID_TI925T, "ti925t" },
-    { ARM_CPUID_PXA250, "pxa250" },
-    { ARM_CPUID_SA1100,    "sa1100" },
-    { ARM_CPUID_SA1110,    "sa1110" },
-    { ARM_CPUID_PXA255, "pxa255" },
-    { ARM_CPUID_PXA260, "pxa260" },
-    { ARM_CPUID_PXA261, "pxa261" },
-    { ARM_CPUID_PXA262, "pxa262" },
-    { ARM_CPUID_PXA270, "pxa270" },
-    { ARM_CPUID_PXA270_A0, "pxa270-a0" },
-    { ARM_CPUID_PXA270_A1, "pxa270-a1" },
-    { ARM_CPUID_PXA270_B0, "pxa270-b0" },
-    { ARM_CPUID_PXA270_B1, "pxa270-b1" },
-    { ARM_CPUID_PXA270_C0, "pxa270-c0" },
-    { ARM_CPUID_PXA270_C5, "pxa270-c5" },
-    { ARM_CPUID_ANY, "any"},
-    { 0, NULL}
-};
+typedef struct ARMCPUListState {
+    fprintf_function cpu_fprintf;
+    FILE *file;
+} ARMCPUListState;
 
-void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+/* Sort alphabetically by type name, except for "any". */
+static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
 {
-    int i;
+    ObjectClass *class_a = (ObjectClass *)a;
+    ObjectClass *class_b = (ObjectClass *)b;
+    const char *name_a, *name_b;
 
-    (*cpu_fprintf)(f, "Available CPUs:\n");
-    for (i = 0; arm_cpu_names[i].name; i++) {
-        (*cpu_fprintf)(f, "  %s\n", arm_cpu_names[i].name);
+    name_a = object_class_get_name(class_a);
+    name_b = object_class_get_name(class_b);
+    if (strcmp(name_a, "any") == 0) {
+        return 1;
+    } else if (strcmp(name_b, "any") == 0) {
+        return -1;
+    } else {
+        return strcmp(name_a, name_b);
     }
 }
 
-/* return 0 if not found */
-static uint32_t cpu_arm_find_by_name(const char *name)
+static void arm_cpu_list_entry(gpointer data, gpointer user_data)
 {
-    int i;
-    uint32_t id;
+    ObjectClass *oc = data;
+    ARMCPUListState *s = user_data;
 
-    id = 0;
-    for (i = 0; arm_cpu_names[i].name; i++) {
-        if (strcmp(name, arm_cpu_names[i].name) == 0) {
-            id = arm_cpu_names[i].id;
-            break;
-        }
-    }
-    return id;
+    (*s->cpu_fprintf)(s->file, "  %s\n",
+                      object_class_get_name(oc));
+}
+
+void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+    ARMCPUListState s = {
+        .file = f,
+        .cpu_fprintf = cpu_fprintf,
+    };
+    GSList *list;
+
+    list = object_class_get_list(TYPE_ARM_CPU, false);
+    list = g_slist_sort(list, arm_cpu_list_compare);
+    (*cpu_fprintf)(f, "Available CPUs:\n");
+    g_slist_foreach(list, arm_cpu_list_entry, &s);
+    g_slist_free(list);
 }
 
 static int bad_mode_switch(CPUARMState *env, int mode)