coldboot/coldboot.c

   1 #include <stdint.h>
   2 #include <stdbool.h>
   3
   4 #include "console.h"
   5 #include "microwatt_soc.h"
   6 #include "io.h"
   7
   8 #include <stdlib.h>
   9 #include <stdint.h>
  10 #include <gram.h>
  11
  12 #include "elf64.h"
  13
  14 static inline uint32_t read32(const void *addr)
  15 {
  16         return *(volatile uint32_t *)addr;
  17 }
  18
  19 static inline void write32(void *addr, uint32_t value)
  20 {
  21         *(volatile uint32_t *)addr = value;
  22 }
  23
  24 struct uart_regs {
  25         uint32_t divisor;
  26         uint32_t rx_data;
  27         uint32_t rx_rdy;
  28         uint32_t rx_err;
  29         uint32_t tx_data;
  30         uint32_t tx_rdy;
  31         uint32_t zero0; // reserved
  32         uint32_t zero1; // reserved
  33         uint32_t ev_status;
  34         uint32_t ev_pending;
  35         uint32_t ev_enable;
  36 };
  37
  38 void memcpy(void *dest, void *src, size_t n) {
  39    int i;
  40    //cast src and dest to char*
  41    char *src_char = (char *)src;
  42    char *dest_char = (char *)dest;
  43    for (i=0; i<n; i++)
  44           dest_char[i] = src_char[i]; //copy contents byte by byte
  45 }
  46
  47 void uart_writeuint32(uint32_t val) {
  48         const char lut[] = { '0', '1', '2', '3', '4', '5', '6', '7',
  49                          '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
  50         uint8_t *val_arr = (uint8_t*)(&val);
  51         size_t i;
  52
  53         for (i = 0; i < 4; i++) {
  54                 putchar(lut[(val_arr[3-i] >> 4) & 0xF]);
  55                 putchar(lut[val_arr[3-i] & 0xF]);
  56         }
  57 }
  58
  59 void isr(void) {
  60
  61 }
  62
  63 static bool fl_read(void *dst, uint32_t offset, uint32_t size)
  64 {
  65     uint8_t *d = dst;
  66     memcpy(d, (void *)(unsigned long)(SPI_FLASH_BASE + offset), size);
  67     return true;
  68 }
  69
  70 static unsigned long copy_flash(unsigned int offset)
  71 {
  72     Elf64_Ehdr ehdr;
  73     Elf64_Phdr ph;
  74     unsigned int i, poff, size, off;
  75     void *addr;
  76
  77     puts("Trying flash...\r\n");
  78     if (!fl_read(&ehdr, offset, sizeof(ehdr)))
  79         return -1ul;
  80     if (!IS_ELF(ehdr) || ehdr.e_ident[EI_CLASS] != ELFCLASS64) {
  81         puts("Doesn't look like an elf64\r\n");
  82         goto dump;
  83     }
  84     if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB ||
  85         ehdr.e_machine != EM_PPC64) {
  86         puts("Not a ppc64le binary\r\n");
  87         goto dump;
  88     }
  89
  90     poff = offset + ehdr.e_phoff;
  91     for (i = 0; i < ehdr.e_phnum; i++) {
  92         if (!fl_read(&ph, poff, sizeof(ph)))
  93             goto dump;
  94         if (ph.p_type != PT_LOAD)
  95             continue;
  96
  97         /* XXX Add bound checking ! */
  98         size = ph.p_filesz;
  99         addr = (void *)ph.p_vaddr;
 100         off  = offset + ph.p_offset;
 101         //printf("Copy segment %d (0x%x bytes) to %p\n", i, size, addr);
 102         puts("Copy segment ");
 103         uart_writeuint32(i);
 104         puts(" size ");
 105         uart_writeuint32(size);
 106         puts(" addr ");
 107         uart_writeuint32((uint32_t)addr);
 108         puts("\r\n");
 109         fl_read(addr, off, size);
 110         poff += ehdr.e_phentsize;
 111     }
 112
 113     puts("Booting from DRAM at");
 114     uart_writeuint32((unsigned int)ehdr.e_entry);
 115     //flush_cpu_icache();
 116     return ehdr.e_entry;
 117 dump:
 118     puts("HDR: \r\n");
 119     for (i = 0; i < 8; i++) {
 120         uart_writeuint32(ehdr.e_ident[i]);
 121         puts("\r\n");
 122     }
 123
 124     return -1ul;
 125 }
 126
 127
 128 // XXX
 129 // Defining gram_[read|write] allows a trace of all register
 130 // accesses to be dumped to console for debugging purposes.
 131 // To use, define GRAM_RW_FUNC in gram.h
 132 uint32_t gram_read(const struct gramCtx *ctx, void *addr) {
 133         uint32_t dword;
 134
 135         puts("gram_read: ");
 136         uart_writeuint32((unsigned long)addr);
 137         dword = readl((unsigned long)addr);
 138         puts(": ");
 139         uart_writeuint32((unsigned long)dword);
 140         puts("\n");
 141
 142         return dword;
 143 }
 144
 145 int gram_write(const struct gramCtx *ctx, void *addr, uint32_t value) {
 146         puts("gram_write: ");
 147         uart_writeuint32((unsigned long)addr);
 148         puts(": ");
 149         uart_writeuint32((unsigned long)value);
 150         writel(value, (unsigned long)addr);
 151         puts("\n");
 152
 153         return 0;
 154 }
 155
 156 int main(void) {
 157         const int kNumIterations = 14;
 158         int res, failcnt = 0;
 159         uint32_t tmp;
 160     unsigned long ftr, spi_offs=0x0;
 161         volatile uint32_t *ram = (uint32_t*)MEMORY_BASE;
 162
 163         console_init();
 164         //puts("Firmware launched...\n");
 165
 166 #if 1
 167     puts(" Soc signature: ");
 168     tmp = readl(SYSCON_BASE + SYS_REG_SIGNATURE);
 169     uart_writeuint32(tmp);
 170     puts("  Soc features: ");
 171     ftr = readl(SYSCON_BASE + SYS_REG_INFO);
 172     if (ftr & SYS_REG_INFO_HAS_UART)
 173         puts("UART ");
 174     if (ftr & SYS_REG_INFO_HAS_DRAM)
 175         puts("DRAM ");
 176     if (ftr & SYS_REG_INFO_HAS_BRAM)
 177         puts("BRAM ");
 178     if (ftr & SYS_REG_INFO_HAS_SPI_FLASH)
 179         puts("SPIFLASH ");
 180     if (ftr & SYS_REG_INFO_HAS_LITEETH)
 181         puts("ETHERNET ");
 182     puts("\r\n");
 183
 184     if (ftr & SYS_REG_INFO_HAS_SPI_FLASH) {
 185         puts("SPI Offset: ");
 186         spi_offs = readl(SYSCON_BASE + SYS_REG_SPI_INFO);
 187         uart_writeuint32(spi_offs);
 188         puts("\r\n");
 189     }
 190
 191 #endif
 192
 193 #if 0
 194 #if 1
 195     // print out configuration parameters for QSPI
 196         volatile uint32_t *qspi_cfg = (uint32_t*)0xc0003000;
 197     for (int k=0; k < 2; k++) {
 198         tmp = readl((unsigned long)&(qspi_cfg[k]));
 199         //puts("cfg");
 200         //uart_writeuint32(k);
 201         //puts(" ");
 202         //uart_writeuint32(tmp);
 203         //puts("\n");
 204     }
 205 #endif
 206         volatile uint32_t *qspi = (uint32_t*)spi_mem;
 207        volatile uint8_t *qspi_bytes = (uint8_t*)spi_mem;
 208      // let's not, eh? writel(0xDEAF0123, (unsigned long)&(qspi[0]));
 209      // tmp = readl((unsigned long)&(qspi[0]));
 210 for (i=0;i<1000;i++) {
 211   tmp = readl((unsigned long)&(qspi[i]));
 212   uart_writeuint32(tmp);
 213   puts(" ");
 214 }
 215 putchar(10);
 216 putchar(10);
 217 for (i=0;i<1000;i++) {
 218   tmp = readb((unsigned long)&(qspi_bytes[i]));
 219   uart_writeuint32(tmp);
 220   puts(" ");
 221 }
 222 #if 1
 223     while (1) {
 224         // quick read
 225         tmp = readl((unsigned long)&(qspi[0x1000/4]));
 226         puts("read 0x1000");
 227         uart_writeuint32(tmp);
 228         putchar(10);
 229     }
 230 #endif
 231     while (1) {
 232         unsigned char c = getchar();
 233         putchar(c);
 234         if (c == 13) { // if CR send LF
 235
 236             // quick read
 237             tmp = readl((unsigned long)&(qspi[1<<i]));
 238             puts("read ");
 239             uart_writeuint32(1<<i);
 240             puts(" ");
 241             uart_writeuint32(tmp);
 242             putchar(10);
 243             i++;
 244         }
 245     }
 246
 247     return 0;
 248 #endif
 249 #if 0
 250         volatile uint32_t *hyperram = (uint32_t*)0xa0000000;
 251     writel(0xDEAF0123, (unsigned long)&(hyperram[0]));
 252     tmp = readl((unsigned long)&(hyperram[0]));
 253     while (1) {
 254         unsigned char c = getchar();
 255         putchar(c);
 256         if (c == 13) { // if CR send LF
 257
 258             // quick write/read
 259             writel(0xDEAF0123+i, (unsigned long)&(hyperram[1<<i]));
 260             tmp = readl((unsigned long)&(hyperram[1<<i]));
 261             puts("read ");
 262             uart_writeuint32(1<<i);
 263             puts(" ");
 264             uart_writeuint32(tmp);
 265             putchar(10);
 266             i++;
 267         }
 268     }
 269
 270     return 0;
 271 #endif
 272
 273     for (int persistence=0; persistence < 1000; persistence++) {
 274         puts("DRAM init... ");
 275
 276         struct gramCtx ctx;
 277 #if 1
 278         struct gramProfile profile = {
 279             .mode_registers = {
 280                 0xb20, 0x806, 0x200, 0x0
 281             },
 282             .rdly_p0 = 2,
 283             .rdly_p1 = 2,
 284         };
 285 #endif
 286 #if 0
 287         struct gramProfile profile = {
 288             .mode_registers = {
 289                 0x0320, 0x0006, 0x0200, 0x0000
 290             },
 291             .rdly_p0 = 1,
 292             .rdly_p1 = 1,
 293         };
 294 #endif
 295         struct gramProfile profile2;
 296         gram_init(&ctx, &profile, (void*)MEMORY_BASE,
 297                                   (void*)DRAM_CTRL_BASE,
 298                                   (void*)DRAM_INIT_BASE);
 299         puts("done\n");
 300
 301         puts("MR profile: ");
 302         uart_writeuint32(profile.mode_registers[0]);
 303         puts(" ");
 304         uart_writeuint32(profile.mode_registers[1]);
 305         puts(" ");
 306         uart_writeuint32(profile.mode_registers[2]);
 307         puts(" ");
 308         uart_writeuint32(profile.mode_registers[3]);
 309         puts("\n");
 310
 311         // FIXME
 312         // Early read test for WB access sim
 313         //uart_writeuint32(*ram);
 314
 315 #if 1
 316         puts("Rdly\np0: ");
 317         for (size_t i = 0; i < 8; i++) {
 318             profile2.rdly_p0 = i;
 319             gram_load_calibration(&ctx, &profile2);
 320             gram_reset_burstdet(&ctx);
 321
 322             for (size_t j = 0; j < 128; j++) {
 323                 tmp = readl((unsigned long)&(ram[i]));
 324             }
 325             if (gram_read_burstdet(&ctx, 0)) {
 326                 puts("1");
 327             } else {
 328                 puts("0");
 329             }
 330         }
 331         puts("\n");
 332
 333         puts("Rdly\np1: ");
 334         for (size_t i = 0; i < 8; i++) {
 335             profile2.rdly_p1 = i;
 336             gram_load_calibration(&ctx, &profile2);
 337             gram_reset_burstdet(&ctx);
 338             for (size_t j = 0; j < 128; j++) {
 339                 tmp = readl((unsigned long)&(ram[i]));
 340             }
 341             if (gram_read_burstdet(&ctx, 1)) {
 342                 puts("1");
 343             } else {
 344                 puts("0");
 345             }
 346         }
 347         puts("\n");
 348
 349         puts("Auto calibrating... ");
 350         res = gram_generate_calibration(&ctx, &profile2);
 351         if (res != GRAM_ERR_NONE) {
 352             puts("failed\n");
 353             gram_load_calibration(&ctx, &profile);
 354         } else {
 355             gram_load_calibration(&ctx, &profile2);
 356         }
 357         puts("done\n");
 358
 359         puts("Auto calibration profile:");
 360         puts("p0 rdly:");
 361         uart_writeuint32(profile2.rdly_p0);
 362         puts(" p1 rdly:");
 363         uart_writeuint32(profile2.rdly_p1);
 364         puts("\n");
 365 #endif
 366
 367         puts("Reloading built-in calibration profile...");
 368         gram_load_calibration(&ctx, &profile);
 369
 370         puts("DRAM test... \n");
 371         for (size_t i = 0; i < kNumIterations; i++) {
 372             writel(0xDEAF0000 | i*4, (unsigned long)&(ram[i]));
 373         }
 374
 375 #if 0
 376         for (int dly = 0; dly < 8; dly++) {
 377             failcnt = 0;
 378             profile2.rdly_p0 = dly;
 379             profile2.rdly_p1 = dly;
 380             puts("p0 rdly:");
 381             uart_writeuint32(profile2.rdly_p0);
 382             puts(" p1 rdly:");
 383             uart_writeuint32(profile2.rdly_p1);
 384             gram_load_calibration(&ctx, &profile2);
 385             for (size_t i = 0; i < kNumIterations; i++) {
 386                 if (readl((unsigned long)&(ram[i])) != (0xDEAF0000 | i*4)) {
 387                     puts("fail : *(0x");
 388                     uart_writeuint32((unsigned long)(&ram[i]));
 389                     puts(") = ");
 390                     uart_writeuint32(readl((unsigned long)&(ram[i])));
 391                     puts("\n");
 392                     failcnt++;
 393
 394                     if (failcnt > 10) {
 395                         puts("Test canceled (more than 10 errors)\n");
 396                         break;
 397                     }
 398                 }
 399             }
 400         }
 401 #else
 402         failcnt = 0;
 403         for (size_t i = 0; i < kNumIterations; i++) {
 404             if (readl((unsigned long)&(ram[i])) != (0xDEAF0000 | i*4)) {
 405                 puts("fail : *(0x");
 406                 uart_writeuint32((unsigned long)(&ram[i]));
 407                 puts(") = ");
 408                 uart_writeuint32(readl((unsigned long)&(ram[i])));
 409                 puts("\n");
 410                 failcnt++;
 411
 412                 if (failcnt > 10) {
 413                     puts("Test canceled (more than 10 errors)\n");
 414                     break;
 415                 }
 416             }
 417         }
 418         if (failcnt == 0) { // fiinally...
 419             break;
 420         }
 421     }
 422 #endif
 423         puts("done\n");
 424
 425     // memcpy from SPI Flash to SDRAM then boot
 426     if ((ftr & SYS_REG_INFO_HAS_SPI_FLASH) &&
 427         (ftr & SYS_REG_INFO_HAS_DRAM) &&
 428         (failcnt == 0))
 429     {
 430         // identify ELF, copy if present, and get the start address
 431         unsigned long faddr = copy_flash(spi_offs);
 432         if (faddr != -1ul) {
 433             // jump to absolute address
 434             return faddr;
 435         }
 436     }
 437
 438         return 0;
 439 }
 440