hw/misc/xlnx-zynqmp-apu-ctrl.c

   1 /*
   2  * QEMU model of the ZynqMP APU Control.
   3  *
   4  * Copyright (c) 2013-2022 Xilinx Inc
   5  * SPDX-License-Identifier: GPL-2.0-or-later
   6  *
   7  * Written by Peter Crosthwaite <peter.crosthwaite@xilinx.com> and
   8  * Edgar E. Iglesias <edgar.iglesias@xilinx.com>
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "qapi/error.h"
  13 #include "qemu/log.h"
  14 #include "migration/vmstate.h"
  15 #include "hw/qdev-properties.h"
  16 #include "hw/sysbus.h"
  17 #include "hw/irq.h"
  18 #include "hw/register.h"
  19
  20 #include "qemu/bitops.h"
  21
  22 #include "hw/misc/xlnx-zynqmp-apu-ctrl.h"
  23
  24 #ifndef XILINX_ZYNQMP_APU_ERR_DEBUG
  25 #define XILINX_ZYNQMP_APU_ERR_DEBUG 0
  26 #endif
  27
  28 static void update_wfi_out(void *opaque)
  29 {
  30     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(opaque);
  31     unsigned int i, wfi_pending;
  32
  33     wfi_pending = s->cpu_pwrdwn_req & s->cpu_in_wfi;
  34     for (i = 0; i < APU_MAX_CPU; i++) {
  35         qemu_set_irq(s->wfi_out[i], !!(wfi_pending & (1 << i)));
  36     }
  37 }
  38
  39 static void zynqmp_apu_rvbar_post_write(RegisterInfo *reg, uint64_t val)
  40 {
  41     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(reg->opaque);
  42     int i;
  43
  44     for (i = 0; i < APU_MAX_CPU; ++i) {
  45         uint64_t rvbar = s->regs[R_RVBARADDR0L + 2 * i] +
  46                          ((uint64_t)s->regs[R_RVBARADDR0H + 2 * i] << 32);
  47         if (s->cpus[i]) {
  48             object_property_set_int(OBJECT(s->cpus[i]), "rvbar", rvbar,
  49                                     &error_abort);
  50         }
  51     }
  52 }
  53
  54 static void zynqmp_apu_pwrctl_post_write(RegisterInfo *reg, uint64_t val)
  55 {
  56     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(reg->opaque);
  57     unsigned int i, new;
  58
  59     for (i = 0; i < APU_MAX_CPU; i++) {
  60         new = val & (1 << i);
  61         /* Check if CPU's CPUPWRDNREQ has changed. If yes, update GPIOs. */
  62         if (new != (s->cpu_pwrdwn_req & (1 << i))) {
  63             qemu_set_irq(s->cpu_power_status[i], !!new);
  64         }
  65         s->cpu_pwrdwn_req &= ~(1 << i);
  66         s->cpu_pwrdwn_req |= new;
  67     }
  68     update_wfi_out(s);
  69 }
  70
  71 static void imr_update_irq(XlnxZynqMPAPUCtrl *s)
  72 {
  73     bool pending = s->regs[R_ISR] & ~s->regs[R_IMR];
  74     qemu_set_irq(s->irq_imr, pending);
  75 }
  76
  77 static void isr_postw(RegisterInfo *reg, uint64_t val64)
  78 {
  79     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(reg->opaque);
  80     imr_update_irq(s);
  81 }
  82
  83 static uint64_t ien_prew(RegisterInfo *reg, uint64_t val64)
  84 {
  85     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(reg->opaque);
  86     uint32_t val = val64;
  87
  88     s->regs[R_IMR] &= ~val;
  89     imr_update_irq(s);
  90     return 0;
  91 }
  92
  93 static uint64_t ids_prew(RegisterInfo *reg, uint64_t val64)
  94 {
  95     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(reg->opaque);
  96     uint32_t val = val64;
  97
  98     s->regs[R_IMR] |= val;
  99     imr_update_irq(s);
 100     return 0;
 101 }
 102
 103 static const RegisterAccessInfo zynqmp_apu_regs_info[] = {
 104 #define RVBAR_REGDEF(n) \
 105     {   .name = "RVBAR CPU " #n " Low",  .addr = A_RVBARADDR ## n ## L,    \
 106             .reset = 0xffff0000ul,                                         \
 107             .post_write = zynqmp_apu_rvbar_post_write,                     \
 108     },{ .name = "RVBAR CPU " #n " High", .addr = A_RVBARADDR ## n ## H,    \
 109             .post_write = zynqmp_apu_rvbar_post_write,                     \
 110     }
 111     {   .name = "ERR_CTRL",  .addr = A_APU_ERR_CTRL,
 112     },{ .name = "ISR",  .addr = A_ISR,
 113         .w1c = 0x1,
 114         .post_write = isr_postw,
 115     },{ .name = "IMR",  .addr = A_IMR,
 116         .reset = 0x1,
 117         .ro = 0x1,
 118     },{ .name = "IEN",  .addr = A_IEN,
 119         .pre_write = ien_prew,
 120     },{ .name = "IDS",  .addr = A_IDS,
 121         .pre_write = ids_prew,
 122     },{ .name = "CONFIG_0",  .addr = A_CONFIG_0,
 123         .reset = 0xf0f,
 124     },{ .name = "CONFIG_1",  .addr = A_CONFIG_1,
 125     },
 126     RVBAR_REGDEF(0),
 127     RVBAR_REGDEF(1),
 128     RVBAR_REGDEF(2),
 129     RVBAR_REGDEF(3),
 130     { .name = "ACE_CTRL",  .addr = A_ACE_CTRL,
 131         .reset = 0xf000f,
 132     },{ .name = "SNOOP_CTRL",  .addr = A_SNOOP_CTRL,
 133     },{ .name = "PWRCTL",  .addr = A_PWRCTL,
 134         .post_write = zynqmp_apu_pwrctl_post_write,
 135     },{ .name = "PWRSTAT",  .addr = A_PWRSTAT,
 136         .ro = 0x3000f,
 137     }
 138 };
 139
 140 static void zynqmp_apu_reset_enter(Object *obj, ResetType type)
 141 {
 142     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(obj);
 143     int i;
 144
 145     for (i = 0; i < APU_R_MAX; ++i) {
 146         register_reset(&s->regs_info[i]);
 147     }
 148
 149     s->cpu_pwrdwn_req = 0;
 150     s->cpu_in_wfi = 0;
 151 }
 152
 153 static void zynqmp_apu_reset_hold(Object *obj)
 154 {
 155     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(obj);
 156
 157     update_wfi_out(s);
 158     imr_update_irq(s);
 159 }
 160
 161 static const MemoryRegionOps zynqmp_apu_ops = {
 162     .read = register_read_memory,
 163     .write = register_write_memory,
 164     .endianness = DEVICE_LITTLE_ENDIAN,
 165     .valid = {
 166         .min_access_size = 4,
 167         .max_access_size = 4,
 168     }
 169 };
 170
 171 static void zynqmp_apu_handle_wfi(void *opaque, int irq, int level)
 172 {
 173     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(opaque);
 174
 175     s->cpu_in_wfi = deposit32(s->cpu_in_wfi, irq, 1, level);
 176     update_wfi_out(s);
 177 }
 178
 179 static void zynqmp_apu_init(Object *obj)
 180 {
 181     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(obj);
 182     int i;
 183
 184     s->reg_array =
 185         register_init_block32(DEVICE(obj), zynqmp_apu_regs_info,
 186                               ARRAY_SIZE(zynqmp_apu_regs_info),
 187                               s->regs_info, s->regs,
 188                               &zynqmp_apu_ops,
 189                               XILINX_ZYNQMP_APU_ERR_DEBUG,
 190                               APU_R_MAX * 4);
 191     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->reg_array->mem);
 192     sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq_imr);
 193
 194     for (i = 0; i < APU_MAX_CPU; ++i) {
 195         g_autofree gchar *prop_name = g_strdup_printf("cpu%d", i);
 196         object_property_add_link(obj, prop_name, TYPE_ARM_CPU,
 197                                  (Object **)&s->cpus[i],
 198                                  qdev_prop_allow_set_link_before_realize,
 199                                  OBJ_PROP_LINK_STRONG);
 200     }
 201
 202     /* wfi_out is used to connect to PMU GPIs. */
 203     qdev_init_gpio_out_named(DEVICE(obj), s->wfi_out, "wfi_out", 4);
 204     /* CPU_POWER_STATUS is used to connect to INTC redirect. */
 205     qdev_init_gpio_out_named(DEVICE(obj), s->cpu_power_status,
 206                              "CPU_POWER_STATUS", 4);
 207     /* wfi_in is used as input from CPUs as wfi request. */
 208     qdev_init_gpio_in_named(DEVICE(obj), zynqmp_apu_handle_wfi, "wfi_in", 4);
 209 }
 210
 211 static void zynqmp_apu_finalize(Object *obj)
 212 {
 213     XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU_CTRL(obj);
 214     register_finalize_block(s->reg_array);
 215 }
 216
 217 static const VMStateDescription vmstate_zynqmp_apu = {
 218     .name = TYPE_XLNX_ZYNQMP_APU_CTRL,
 219     .version_id = 1,
 220     .minimum_version_id = 1,
 221     .fields = (VMStateField[]) {
 222         VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPAPUCtrl, APU_R_MAX),
 223         VMSTATE_END_OF_LIST(),
 224     }
 225 };
 226
 227 static void zynqmp_apu_class_init(ObjectClass *klass, void *data)
 228 {
 229     ResettableClass *rc = RESETTABLE_CLASS(klass);
 230     DeviceClass *dc = DEVICE_CLASS(klass);
 231
 232     dc->vmsd = &vmstate_zynqmp_apu;
 233
 234     rc->phases.enter = zynqmp_apu_reset_enter;
 235     rc->phases.hold = zynqmp_apu_reset_hold;
 236 }
 237
 238 static const TypeInfo zynqmp_apu_info = {
 239     .name              = TYPE_XLNX_ZYNQMP_APU_CTRL,
 240     .parent            = TYPE_SYS_BUS_DEVICE,
 241     .instance_size     = sizeof(XlnxZynqMPAPUCtrl),
 242     .class_init        = zynqmp_apu_class_init,
 243     .instance_init     = zynqmp_apu_init,
 244     .instance_finalize = zynqmp_apu_finalize,
 245 };
 246
 247 static void zynqmp_apu_register_types(void)
 248 {
 249     type_register_static(&zynqmp_apu_info);
 250 }
 251
 252 type_init(zynqmp_apu_register_types)