hw/misc/zynq_slcr.c

   1 /*
   2  * Status and system control registers for Xilinx Zynq Platform
   3  *
   4  * Copyright (c) 2011 Michal Simek <monstr@monstr.eu>
   5  * Copyright (c) 2012 PetaLogix Pty Ltd.
   6  * Based on hw/arm_sysctl.c, written by Paul Brook
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version
  11  * 2 of the License, or (at your option) any later version.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include "qemu/osdep.h"
  18 #include "qemu/timer.h"
  19 #include "sysemu/runstate.h"
  20 #include "hw/sysbus.h"
  21 #include "migration/vmstate.h"
  22 #include "qemu/log.h"
  23 #include "qemu/module.h"
  24 #include "hw/registerfields.h"
  25 #include "hw/qdev-clock.h"
  26 #include "qom/object.h"
  27
  28 #ifndef ZYNQ_SLCR_ERR_DEBUG
  29 #define ZYNQ_SLCR_ERR_DEBUG 0
  30 #endif
  31
  32 #define DB_PRINT(...) do { \
  33         if (ZYNQ_SLCR_ERR_DEBUG) { \
  34             fprintf(stderr,  ": %s: ", __func__); \
  35             fprintf(stderr, ## __VA_ARGS__); \
  36         } \
  37     } while (0)
  38
  39 #define XILINX_LOCK_KEY 0x767b
  40 #define XILINX_UNLOCK_KEY 0xdf0d
  41
  42 REG32(SCL, 0x000)
  43 REG32(LOCK, 0x004)
  44 REG32(UNLOCK, 0x008)
  45 REG32(LOCKSTA, 0x00c)
  46
  47 REG32(ARM_PLL_CTRL, 0x100)
  48 REG32(DDR_PLL_CTRL, 0x104)
  49 REG32(IO_PLL_CTRL, 0x108)
  50 /* fields for [ARM|DDR|IO]_PLL_CTRL registers */
  51     FIELD(xxx_PLL_CTRL, PLL_RESET, 0, 1)
  52     FIELD(xxx_PLL_CTRL, PLL_PWRDWN, 1, 1)
  53     FIELD(xxx_PLL_CTRL, PLL_BYPASS_QUAL, 3, 1)
  54     FIELD(xxx_PLL_CTRL, PLL_BYPASS_FORCE, 4, 1)
  55     FIELD(xxx_PLL_CTRL, PLL_FPDIV, 12, 7)
  56 REG32(PLL_STATUS, 0x10c)
  57 REG32(ARM_PLL_CFG, 0x110)
  58 REG32(DDR_PLL_CFG, 0x114)
  59 REG32(IO_PLL_CFG, 0x118)
  60
  61 REG32(ARM_CLK_CTRL, 0x120)
  62 REG32(DDR_CLK_CTRL, 0x124)
  63 REG32(DCI_CLK_CTRL, 0x128)
  64 REG32(APER_CLK_CTRL, 0x12c)
  65 REG32(USB0_CLK_CTRL, 0x130)
  66 REG32(USB1_CLK_CTRL, 0x134)
  67 REG32(GEM0_RCLK_CTRL, 0x138)
  68 REG32(GEM1_RCLK_CTRL, 0x13c)
  69 REG32(GEM0_CLK_CTRL, 0x140)
  70 REG32(GEM1_CLK_CTRL, 0x144)
  71 REG32(SMC_CLK_CTRL, 0x148)
  72 REG32(LQSPI_CLK_CTRL, 0x14c)
  73 REG32(SDIO_CLK_CTRL, 0x150)
  74 REG32(UART_CLK_CTRL, 0x154)
  75     FIELD(UART_CLK_CTRL, CLKACT0, 0, 1)
  76     FIELD(UART_CLK_CTRL, CLKACT1, 1, 1)
  77     FIELD(UART_CLK_CTRL, SRCSEL,  4, 2)
  78     FIELD(UART_CLK_CTRL, DIVISOR, 8, 6)
  79 REG32(SPI_CLK_CTRL, 0x158)
  80 REG32(CAN_CLK_CTRL, 0x15c)
  81 REG32(CAN_MIOCLK_CTRL, 0x160)
  82 REG32(DBG_CLK_CTRL, 0x164)
  83 REG32(PCAP_CLK_CTRL, 0x168)
  84 REG32(TOPSW_CLK_CTRL, 0x16c)
  85
  86 #define FPGA_CTRL_REGS(n, start) \
  87     REG32(FPGA ## n ## _CLK_CTRL, (start)) \
  88     REG32(FPGA ## n ## _THR_CTRL, (start) + 0x4)\
  89     REG32(FPGA ## n ## _THR_CNT,  (start) + 0x8)\
  90     REG32(FPGA ## n ## _THR_STA,  (start) + 0xc)
  91 FPGA_CTRL_REGS(0, 0x170)
  92 FPGA_CTRL_REGS(1, 0x180)
  93 FPGA_CTRL_REGS(2, 0x190)
  94 FPGA_CTRL_REGS(3, 0x1a0)
  95
  96 REG32(BANDGAP_TRIP, 0x1b8)
  97 REG32(PLL_PREDIVISOR, 0x1c0)
  98 REG32(CLK_621_TRUE, 0x1c4)
  99
 100 REG32(PSS_RST_CTRL, 0x200)
 101     FIELD(PSS_RST_CTRL, SOFT_RST, 0, 1)
 102 REG32(DDR_RST_CTRL, 0x204)
 103 REG32(TOPSW_RESET_CTRL, 0x208)
 104 REG32(DMAC_RST_CTRL, 0x20c)
 105 REG32(USB_RST_CTRL, 0x210)
 106 REG32(GEM_RST_CTRL, 0x214)
 107 REG32(SDIO_RST_CTRL, 0x218)
 108 REG32(SPI_RST_CTRL, 0x21c)
 109 REG32(CAN_RST_CTRL, 0x220)
 110 REG32(I2C_RST_CTRL, 0x224)
 111 REG32(UART_RST_CTRL, 0x228)
 112 REG32(GPIO_RST_CTRL, 0x22c)
 113 REG32(LQSPI_RST_CTRL, 0x230)
 114 REG32(SMC_RST_CTRL, 0x234)
 115 REG32(OCM_RST_CTRL, 0x238)
 116 REG32(FPGA_RST_CTRL, 0x240)
 117 REG32(A9_CPU_RST_CTRL, 0x244)
 118
 119 REG32(RS_AWDT_CTRL, 0x24c)
 120 REG32(RST_REASON, 0x250)
 121
 122 REG32(REBOOT_STATUS, 0x258)
 123 REG32(BOOT_MODE, 0x25c)
 124
 125 REG32(APU_CTRL, 0x300)
 126 REG32(WDT_CLK_SEL, 0x304)
 127
 128 REG32(TZ_DMA_NS, 0x440)
 129 REG32(TZ_DMA_IRQ_NS, 0x444)
 130 REG32(TZ_DMA_PERIPH_NS, 0x448)
 131
 132 REG32(PSS_IDCODE, 0x530)
 133
 134 REG32(DDR_URGENT, 0x600)
 135 REG32(DDR_CAL_START, 0x60c)
 136 REG32(DDR_REF_START, 0x614)
 137 REG32(DDR_CMD_STA, 0x618)
 138 REG32(DDR_URGENT_SEL, 0x61c)
 139 REG32(DDR_DFI_STATUS, 0x620)
 140
 141 REG32(MIO, 0x700)
 142 #define MIO_LENGTH 54
 143
 144 REG32(MIO_LOOPBACK, 0x804)
 145 REG32(MIO_MST_TRI0, 0x808)
 146 REG32(MIO_MST_TRI1, 0x80c)
 147
 148 REG32(SD0_WP_CD_SEL, 0x830)
 149 REG32(SD1_WP_CD_SEL, 0x834)
 150
 151 REG32(LVL_SHFTR_EN, 0x900)
 152 REG32(OCM_CFG, 0x910)
 153
 154 REG32(CPU_RAM, 0xa00)
 155
 156 REG32(IOU, 0xa30)
 157
 158 REG32(DMAC_RAM, 0xa50)
 159
 160 REG32(AFI0, 0xa60)
 161 REG32(AFI1, 0xa6c)
 162 REG32(AFI2, 0xa78)
 163 REG32(AFI3, 0xa84)
 164 #define AFI_LENGTH 3
 165
 166 REG32(OCM, 0xa90)
 167
 168 REG32(DEVCI_RAM, 0xaa0)
 169
 170 REG32(CSG_RAM, 0xab0)
 171
 172 REG32(GPIOB_CTRL, 0xb00)
 173 REG32(GPIOB_CFG_CMOS18, 0xb04)
 174 REG32(GPIOB_CFG_CMOS25, 0xb08)
 175 REG32(GPIOB_CFG_CMOS33, 0xb0c)
 176 REG32(GPIOB_CFG_HSTL, 0xb14)
 177 REG32(GPIOB_DRVR_BIAS_CTRL, 0xb18)
 178
 179 REG32(DDRIOB, 0xb40)
 180 #define DDRIOB_LENGTH 14
 181
 182 #define ZYNQ_SLCR_MMIO_SIZE     0x1000
 183 #define ZYNQ_SLCR_NUM_REGS      (ZYNQ_SLCR_MMIO_SIZE / 4)
 184
 185 #define TYPE_ZYNQ_SLCR "xilinx,zynq_slcr"
 186 typedef struct ZynqSLCRState ZynqSLCRState;
 187 DECLARE_INSTANCE_CHECKER(ZynqSLCRState, ZYNQ_SLCR,
 188                          TYPE_ZYNQ_SLCR)
 189
 190 struct ZynqSLCRState {
 191     SysBusDevice parent_obj;
 192
 193     MemoryRegion iomem;
 194
 195     uint32_t regs[ZYNQ_SLCR_NUM_REGS];
 196
 197     Clock *ps_clk;
 198     Clock *uart0_ref_clk;
 199     Clock *uart1_ref_clk;
 200 };
 201
 202 /*
 203  * return the output frequency of ARM/DDR/IO pll
 204  * using input frequency and PLL_CTRL register
 205  */
 206 static uint64_t zynq_slcr_compute_pll(uint64_t input, uint32_t ctrl_reg)
 207 {
 208     uint32_t mult = ((ctrl_reg & R_xxx_PLL_CTRL_PLL_FPDIV_MASK) >>
 209             R_xxx_PLL_CTRL_PLL_FPDIV_SHIFT);
 210
 211     /* first, check if pll is bypassed */
 212     if (ctrl_reg & R_xxx_PLL_CTRL_PLL_BYPASS_FORCE_MASK) {
 213         return input;
 214     }
 215
 216     /* is pll disabled ? */
 217     if (ctrl_reg & (R_xxx_PLL_CTRL_PLL_RESET_MASK |
 218                     R_xxx_PLL_CTRL_PLL_PWRDWN_MASK)) {
 219         return 0;
 220     }
 221
 222     /* frequency multiplier -> period division */
 223     return input / mult;
 224 }
 225
 226 /*
 227  * return the output period of a clock given:
 228  * + the periods in an array corresponding to input mux selector
 229  * + the register xxx_CLK_CTRL value
 230  * + enable bit index in ctrl register
 231  *
 232  * This function makes the assumption that the ctrl_reg value is organized as
 233  * follows:
 234  * + bits[13:8]  clock frequency divisor
 235  * + bits[5:4]   clock mux selector (index in array)
 236  * + bits[index] clock enable
 237  */
 238 static uint64_t zynq_slcr_compute_clock(const uint64_t periods[],
 239                                         uint32_t ctrl_reg,
 240                                         unsigned index)
 241 {
 242     uint32_t srcsel = extract32(ctrl_reg, 4, 2); /* bits [5:4] */
 243     uint32_t divisor = extract32(ctrl_reg, 8, 6); /* bits [13:8] */
 244
 245     /* first, check if clock is disabled */
 246     if (((ctrl_reg >> index) & 1u) == 0) {
 247         return 0;
 248     }
 249
 250     /*
 251      * according to the Zynq technical ref. manual UG585 v1.12.2 in
 252      * Clocks chapter, section 25.10.1 page 705:
 253      * "The 6-bit divider provides a divide range of 1 to 63"
 254      * We follow here what is implemented in linux kernel and consider
 255      * the 0 value as a bypass (no division).
 256      */
 257     /* frequency divisor -> period multiplication */
 258     return periods[srcsel] * (divisor ? divisor : 1u);
 259 }
 260
 261 /*
 262  * macro helper around zynq_slcr_compute_clock to avoid repeating
 263  * the register name.
 264  */
 265 #define ZYNQ_COMPUTE_CLK(state, plls, reg, enable_field) \
 266     zynq_slcr_compute_clock((plls), (state)->regs[reg], \
 267                             reg ## _ ## enable_field ## _SHIFT)
 268
 269 /**
 270  * Compute and set the ouputs clocks periods.
 271  * But do not propagate them further. Connected clocks
 272  * will not receive any updates (See zynq_slcr_compute_clocks())
 273  */
 274 static void zynq_slcr_compute_clocks(ZynqSLCRState *s)
 275 {
 276     uint64_t ps_clk = clock_get(s->ps_clk);
 277
 278     /* consider outputs clocks are disabled while in reset */
 279     if (device_is_in_reset(DEVICE(s))) {
 280         ps_clk = 0;
 281     }
 282
 283     uint64_t io_pll = zynq_slcr_compute_pll(ps_clk, s->regs[R_IO_PLL_CTRL]);
 284     uint64_t arm_pll = zynq_slcr_compute_pll(ps_clk, s->regs[R_ARM_PLL_CTRL]);
 285     uint64_t ddr_pll = zynq_slcr_compute_pll(ps_clk, s->regs[R_DDR_PLL_CTRL]);
 286
 287     uint64_t uart_mux[4] = {io_pll, io_pll, arm_pll, ddr_pll};
 288
 289     /* compute uartX reference clocks */
 290     clock_set(s->uart0_ref_clk,
 291               ZYNQ_COMPUTE_CLK(s, uart_mux, R_UART_CLK_CTRL, CLKACT0));
 292     clock_set(s->uart1_ref_clk,
 293               ZYNQ_COMPUTE_CLK(s, uart_mux, R_UART_CLK_CTRL, CLKACT1));
 294 }
 295
 296 /**
 297  * Propagate the outputs clocks.
 298  * zynq_slcr_compute_clocks() should have been called before
 299  * to configure them.
 300  */
 301 static void zynq_slcr_propagate_clocks(ZynqSLCRState *s)
 302 {
 303     clock_propagate(s->uart0_ref_clk);
 304     clock_propagate(s->uart1_ref_clk);
 305 }
 306
 307 static void zynq_slcr_ps_clk_callback(void *opaque)
 308 {
 309     ZynqSLCRState *s = (ZynqSLCRState *) opaque;
 310     zynq_slcr_compute_clocks(s);
 311     zynq_slcr_propagate_clocks(s);
 312 }
 313
 314 static void zynq_slcr_reset_init(Object *obj, ResetType type)
 315 {
 316     ZynqSLCRState *s = ZYNQ_SLCR(obj);
 317     int i;
 318
 319     DB_PRINT("RESET\n");
 320
 321     s->regs[R_LOCKSTA] = 1;
 322     /* 0x100 - 0x11C */
 323     s->regs[R_ARM_PLL_CTRL]   = 0x0001A008;
 324     s->regs[R_DDR_PLL_CTRL]   = 0x0001A008;
 325     s->regs[R_IO_PLL_CTRL]    = 0x0001A008;
 326     s->regs[R_PLL_STATUS]     = 0x0000003F;
 327     s->regs[R_ARM_PLL_CFG]    = 0x00014000;
 328     s->regs[R_DDR_PLL_CFG]    = 0x00014000;
 329     s->regs[R_IO_PLL_CFG]     = 0x00014000;
 330
 331     /* 0x120 - 0x16C */
 332     s->regs[R_ARM_CLK_CTRL]   = 0x1F000400;
 333     s->regs[R_DDR_CLK_CTRL]   = 0x18400003;
 334     s->regs[R_DCI_CLK_CTRL]   = 0x01E03201;
 335     s->regs[R_APER_CLK_CTRL]  = 0x01FFCCCD;
 336     s->regs[R_USB0_CLK_CTRL]  = s->regs[R_USB1_CLK_CTRL]  = 0x00101941;
 337     s->regs[R_GEM0_RCLK_CTRL] = s->regs[R_GEM1_RCLK_CTRL] = 0x00000001;
 338     s->regs[R_GEM0_CLK_CTRL]  = s->regs[R_GEM1_CLK_CTRL]  = 0x00003C01;
 339     s->regs[R_SMC_CLK_CTRL]   = 0x00003C01;
 340     s->regs[R_LQSPI_CLK_CTRL] = 0x00002821;
 341     s->regs[R_SDIO_CLK_CTRL]  = 0x00001E03;
 342     s->regs[R_UART_CLK_CTRL]  = 0x00003F03;
 343     s->regs[R_SPI_CLK_CTRL]   = 0x00003F03;
 344     s->regs[R_CAN_CLK_CTRL]   = 0x00501903;
 345     s->regs[R_DBG_CLK_CTRL]   = 0x00000F03;
 346     s->regs[R_PCAP_CLK_CTRL]  = 0x00000F01;
 347
 348     /* 0x170 - 0x1AC */
 349     s->regs[R_FPGA0_CLK_CTRL] = s->regs[R_FPGA1_CLK_CTRL]
 350                               = s->regs[R_FPGA2_CLK_CTRL]
 351                               = s->regs[R_FPGA3_CLK_CTRL] = 0x00101800;
 352     s->regs[R_FPGA0_THR_STA] = s->regs[R_FPGA1_THR_STA]
 353                              = s->regs[R_FPGA2_THR_STA]
 354                              = s->regs[R_FPGA3_THR_STA] = 0x00010000;
 355
 356     /* 0x1B0 - 0x1D8 */
 357     s->regs[R_BANDGAP_TRIP]   = 0x0000001F;
 358     s->regs[R_PLL_PREDIVISOR] = 0x00000001;
 359     s->regs[R_CLK_621_TRUE]   = 0x00000001;
 360
 361     /* 0x200 - 0x25C */
 362     s->regs[R_FPGA_RST_CTRL]  = 0x01F33F0F;
 363     s->regs[R_RST_REASON]     = 0x00000040;
 364
 365     s->regs[R_BOOT_MODE]      = 0x00000001;
 366
 367     /* 0x700 - 0x7D4 */
 368     for (i = 0; i < 54; i++) {
 369         s->regs[R_MIO + i] = 0x00001601;
 370     }
 371     for (i = 2; i <= 8; i++) {
 372         s->regs[R_MIO + i] = 0x00000601;
 373     }
 374
 375     s->regs[R_MIO_MST_TRI0] = s->regs[R_MIO_MST_TRI1] = 0xFFFFFFFF;
 376
 377     s->regs[R_CPU_RAM + 0] = s->regs[R_CPU_RAM + 1] = s->regs[R_CPU_RAM + 3]
 378                            = s->regs[R_CPU_RAM + 4] = s->regs[R_CPU_RAM + 7]
 379                            = 0x00010101;
 380     s->regs[R_CPU_RAM + 2] = s->regs[R_CPU_RAM + 5] = 0x01010101;
 381     s->regs[R_CPU_RAM + 6] = 0x00000001;
 382
 383     s->regs[R_IOU + 0] = s->regs[R_IOU + 1] = s->regs[R_IOU + 2]
 384                        = s->regs[R_IOU + 3] = 0x09090909;
 385     s->regs[R_IOU + 4] = s->regs[R_IOU + 5] = 0x00090909;
 386     s->regs[R_IOU + 6] = 0x00000909;
 387
 388     s->regs[R_DMAC_RAM] = 0x00000009;
 389
 390     s->regs[R_AFI0 + 0] = s->regs[R_AFI0 + 1] = 0x09090909;
 391     s->regs[R_AFI1 + 0] = s->regs[R_AFI1 + 1] = 0x09090909;
 392     s->regs[R_AFI2 + 0] = s->regs[R_AFI2 + 1] = 0x09090909;
 393     s->regs[R_AFI3 + 0] = s->regs[R_AFI3 + 1] = 0x09090909;
 394     s->regs[R_AFI0 + 2] = s->regs[R_AFI1 + 2] = s->regs[R_AFI2 + 2]
 395                         = s->regs[R_AFI3 + 2] = 0x00000909;
 396
 397     s->regs[R_OCM + 0] = 0x01010101;
 398     s->regs[R_OCM + 1] = s->regs[R_OCM + 2] = 0x09090909;
 399
 400     s->regs[R_DEVCI_RAM] = 0x00000909;
 401     s->regs[R_CSG_RAM]   = 0x00000001;
 402
 403     s->regs[R_DDRIOB + 0] = s->regs[R_DDRIOB + 1] = s->regs[R_DDRIOB + 2]
 404                           = s->regs[R_DDRIOB + 3] = 0x00000e00;
 405     s->regs[R_DDRIOB + 4] = s->regs[R_DDRIOB + 5] = s->regs[R_DDRIOB + 6]
 406                           = 0x00000e00;
 407     s->regs[R_DDRIOB + 12] = 0x00000021;
 408 }
 409
 410 static void zynq_slcr_reset_hold(Object *obj)
 411 {
 412     ZynqSLCRState *s = ZYNQ_SLCR(obj);
 413
 414     /* will disable all output clocks */
 415     zynq_slcr_compute_clocks(s);
 416     zynq_slcr_propagate_clocks(s);
 417 }
 418
 419 static void zynq_slcr_reset_exit(Object *obj)
 420 {
 421     ZynqSLCRState *s = ZYNQ_SLCR(obj);
 422
 423     /* will compute output clocks according to ps_clk and registers */
 424     zynq_slcr_compute_clocks(s);
 425     zynq_slcr_propagate_clocks(s);
 426 }
 427
 428 static bool zynq_slcr_check_offset(hwaddr offset, bool rnw)
 429 {
 430     switch (offset) {
 431     case R_LOCK:
 432     case R_UNLOCK:
 433     case R_DDR_CAL_START:
 434     case R_DDR_REF_START:
 435         return !rnw; /* Write only */
 436     case R_LOCKSTA:
 437     case R_FPGA0_THR_STA:
 438     case R_FPGA1_THR_STA:
 439     case R_FPGA2_THR_STA:
 440     case R_FPGA3_THR_STA:
 441     case R_BOOT_MODE:
 442     case R_PSS_IDCODE:
 443     case R_DDR_CMD_STA:
 444     case R_DDR_DFI_STATUS:
 445     case R_PLL_STATUS:
 446         return rnw;/* read only */
 447     case R_SCL:
 448     case R_ARM_PLL_CTRL ... R_IO_PLL_CTRL:
 449     case R_ARM_PLL_CFG ... R_IO_PLL_CFG:
 450     case R_ARM_CLK_CTRL ... R_TOPSW_CLK_CTRL:
 451     case R_FPGA0_CLK_CTRL ... R_FPGA0_THR_CNT:
 452     case R_FPGA1_CLK_CTRL ... R_FPGA1_THR_CNT:
 453     case R_FPGA2_CLK_CTRL ... R_FPGA2_THR_CNT:
 454     case R_FPGA3_CLK_CTRL ... R_FPGA3_THR_CNT:
 455     case R_BANDGAP_TRIP:
 456     case R_PLL_PREDIVISOR:
 457     case R_CLK_621_TRUE:
 458     case R_PSS_RST_CTRL ... R_A9_CPU_RST_CTRL:
 459     case R_RS_AWDT_CTRL:
 460     case R_RST_REASON:
 461     case R_REBOOT_STATUS:
 462     case R_APU_CTRL:
 463     case R_WDT_CLK_SEL:
 464     case R_TZ_DMA_NS ... R_TZ_DMA_PERIPH_NS:
 465     case R_DDR_URGENT:
 466     case R_DDR_URGENT_SEL:
 467     case R_MIO ... R_MIO + MIO_LENGTH - 1:
 468     case R_MIO_LOOPBACK ... R_MIO_MST_TRI1:
 469     case R_SD0_WP_CD_SEL:
 470     case R_SD1_WP_CD_SEL:
 471     case R_LVL_SHFTR_EN:
 472     case R_OCM_CFG:
 473     case R_CPU_RAM:
 474     case R_IOU:
 475     case R_DMAC_RAM:
 476     case R_AFI0 ... R_AFI3 + AFI_LENGTH - 1:
 477     case R_OCM:
 478     case R_DEVCI_RAM:
 479     case R_CSG_RAM:
 480     case R_GPIOB_CTRL ... R_GPIOB_CFG_CMOS33:
 481     case R_GPIOB_CFG_HSTL:
 482     case R_GPIOB_DRVR_BIAS_CTRL:
 483     case R_DDRIOB ... R_DDRIOB + DDRIOB_LENGTH - 1:
 484         return true;
 485     default:
 486         return false;
 487     }
 488 }
 489
 490 static uint64_t zynq_slcr_read(void *opaque, hwaddr offset,
 491     unsigned size)
 492 {
 493     ZynqSLCRState *s = opaque;
 494     offset /= 4;
 495     uint32_t ret = s->regs[offset];
 496
 497     if (!zynq_slcr_check_offset(offset, true)) {
 498         qemu_log_mask(LOG_GUEST_ERROR, "zynq_slcr: Invalid read access to "
 499                       " addr %" HWADDR_PRIx "\n", offset * 4);
 500     }
 501
 502     DB_PRINT("addr: %08" HWADDR_PRIx " data: %08" PRIx32 "\n", offset * 4, ret);
 503     return ret;
 504 }
 505
 506 static void zynq_slcr_write(void *opaque, hwaddr offset,
 507                           uint64_t val, unsigned size)
 508 {
 509     ZynqSLCRState *s = (ZynqSLCRState *)opaque;
 510     offset /= 4;
 511
 512     DB_PRINT("addr: %08" HWADDR_PRIx " data: %08" PRIx64 "\n", offset * 4, val);
 513
 514     if (!zynq_slcr_check_offset(offset, false)) {
 515         qemu_log_mask(LOG_GUEST_ERROR, "zynq_slcr: Invalid write access to "
 516                       "addr %" HWADDR_PRIx "\n", offset * 4);
 517         return;
 518     }
 519
 520     switch (offset) {
 521     case R_SCL:
 522         s->regs[R_SCL] = val & 0x1;
 523         return;
 524     case R_LOCK:
 525         if ((val & 0xFFFF) == XILINX_LOCK_KEY) {
 526             DB_PRINT("XILINX LOCK 0xF8000000 + 0x%x <= 0x%x\n", (int)offset,
 527                 (unsigned)val & 0xFFFF);
 528             s->regs[R_LOCKSTA] = 1;
 529         } else {
 530             DB_PRINT("WRONG XILINX LOCK KEY 0xF8000000 + 0x%x <= 0x%x\n",
 531                 (int)offset, (unsigned)val & 0xFFFF);
 532         }
 533         return;
 534     case R_UNLOCK:
 535         if ((val & 0xFFFF) == XILINX_UNLOCK_KEY) {
 536             DB_PRINT("XILINX UNLOCK 0xF8000000 + 0x%x <= 0x%x\n", (int)offset,
 537                 (unsigned)val & 0xFFFF);
 538             s->regs[R_LOCKSTA] = 0;
 539         } else {
 540             DB_PRINT("WRONG XILINX UNLOCK KEY 0xF8000000 + 0x%x <= 0x%x\n",
 541                 (int)offset, (unsigned)val & 0xFFFF);
 542         }
 543         return;
 544     }
 545
 546     if (s->regs[R_LOCKSTA]) {
 547         qemu_log_mask(LOG_GUEST_ERROR,
 548                       "SCLR registers are locked. Unlock them first\n");
 549         return;
 550     }
 551     s->regs[offset] = val;
 552
 553     switch (offset) {
 554     case R_PSS_RST_CTRL:
 555         if (FIELD_EX32(val, PSS_RST_CTRL, SOFT_RST)) {
 556             qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 557         }
 558         break;
 559     case R_IO_PLL_CTRL:
 560     case R_ARM_PLL_CTRL:
 561     case R_DDR_PLL_CTRL:
 562     case R_UART_CLK_CTRL:
 563         zynq_slcr_compute_clocks(s);
 564         zynq_slcr_propagate_clocks(s);
 565         break;
 566     }
 567 }
 568
 569 static const MemoryRegionOps slcr_ops = {
 570     .read = zynq_slcr_read,
 571     .write = zynq_slcr_write,
 572     .endianness = DEVICE_NATIVE_ENDIAN,
 573 };
 574
 575 static const ClockPortInitArray zynq_slcr_clocks = {
 576     QDEV_CLOCK_IN(ZynqSLCRState, ps_clk, zynq_slcr_ps_clk_callback),
 577     QDEV_CLOCK_OUT(ZynqSLCRState, uart0_ref_clk),
 578     QDEV_CLOCK_OUT(ZynqSLCRState, uart1_ref_clk),
 579     QDEV_CLOCK_END
 580 };
 581
 582 static void zynq_slcr_init(Object *obj)
 583 {
 584     ZynqSLCRState *s = ZYNQ_SLCR(obj);
 585
 586     memory_region_init_io(&s->iomem, obj, &slcr_ops, s, "slcr",
 587                           ZYNQ_SLCR_MMIO_SIZE);
 588     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem);
 589
 590     qdev_init_clocks(DEVICE(obj), zynq_slcr_clocks);
 591 }
 592
 593 static const VMStateDescription vmstate_zynq_slcr = {
 594     .name = "zynq_slcr",
 595     .version_id = 3,
 596     .minimum_version_id = 2,
 597     .fields = (VMStateField[]) {
 598         VMSTATE_UINT32_ARRAY(regs, ZynqSLCRState, ZYNQ_SLCR_NUM_REGS),
 599         VMSTATE_CLOCK_V(ps_clk, ZynqSLCRState, 3),
 600         VMSTATE_END_OF_LIST()
 601     }
 602 };
 603
 604 static void zynq_slcr_class_init(ObjectClass *klass, void *data)
 605 {
 606     DeviceClass *dc = DEVICE_CLASS(klass);
 607     ResettableClass *rc = RESETTABLE_CLASS(klass);
 608
 609     dc->vmsd = &vmstate_zynq_slcr;
 610     rc->phases.enter = zynq_slcr_reset_init;
 611     rc->phases.hold  = zynq_slcr_reset_hold;
 612     rc->phases.exit  = zynq_slcr_reset_exit;
 613 }
 614
 615 static const TypeInfo zynq_slcr_info = {
 616     .class_init = zynq_slcr_class_init,
 617     .name  = TYPE_ZYNQ_SLCR,
 618     .parent = TYPE_SYS_BUS_DEVICE,
 619     .instance_size  = sizeof(ZynqSLCRState),
 620     .instance_init = zynq_slcr_init,
 621 };
 622
 623 static void zynq_slcr_register_types(void)
 624 {
 625     type_register_static(&zynq_slcr_info);
 626 }
 627
 628 type_init(zynq_slcr_register_types)