arch/arm/cpu/armv7/ls102xa/cpu.c

   1 /*
   2  * Copyright 2014 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/arch/clock.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/immap_ls102xa.h>
  11 #include <asm/cache.h>
  12 #include <asm/system.h>
  13 #include <tsec.h>
  14 #include <netdev.h>
  15 #include <fsl_esdhc.h>
  16 #include <config.h>
  17 #include <fsl_wdog.h>
  18
  19 #include "fsl_epu.h"
  20
  21 #define DCSR_RCPM2_BLOCK_OFFSET 0x223000
  22 #define DCSR_RCPM2_CPMFSMCR0    0x400
  23 #define DCSR_RCPM2_CPMFSMSR0    0x404
  24 #define DCSR_RCPM2_CPMFSMCR1    0x414
  25 #define DCSR_RCPM2_CPMFSMSR1    0x418
  26 #define CPMFSMSR_FSM_STATE_MASK 0x7f
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 #ifndef CONFIG_SYS_DCACHE_OFF
  31
  32 /*
  33  * Bit[1] of the descriptor indicates the descriptor type,
  34  * and bit[0] indicates whether the descriptor is valid.
  35  */
  36 #define PMD_TYPE_TABLE          0x3
  37 #define PMD_TYPE_SECT           0x1
  38
  39 /* AttrIndx[2:0] */
  40 #define PMD_ATTRINDX(t)         ((t) << 2)
  41
  42 /* Section */
  43 #define PMD_SECT_AF             (1 << 10)
  44
  45 #define BLOCK_SIZE_L1           (1UL << 30)
  46 #define BLOCK_SIZE_L2           (1UL << 21)
  47
  48 /* TTBCR flags */
  49 #define TTBCR_EAE               (1 << 31)
  50 #define TTBCR_T0SZ(x)           ((x) << 0)
  51 #define TTBCR_T1SZ(x)           ((x) << 16)
  52 #define TTBCR_USING_TTBR0       (TTBCR_T0SZ(0) | TTBCR_T1SZ(0))
  53 #define TTBCR_IRGN0_NC          (0 << 8)
  54 #define TTBCR_IRGN0_WBWA        (1 << 8)
  55 #define TTBCR_IRGN0_WT          (2 << 8)
  56 #define TTBCR_IRGN0_WBNWA       (3 << 8)
  57 #define TTBCR_IRGN0_MASK        (3 << 8)
  58 #define TTBCR_ORGN0_NC          (0 << 10)
  59 #define TTBCR_ORGN0_WBWA        (1 << 10)
  60 #define TTBCR_ORGN0_WT          (2 << 10)
  61 #define TTBCR_ORGN0_WBNWA       (3 << 10)
  62 #define TTBCR_ORGN0_MASK        (3 << 10)
  63 #define TTBCR_SHARED_NON        (0 << 12)
  64 #define TTBCR_SHARED_OUTER      (2 << 12)
  65 #define TTBCR_SHARED_INNER      (3 << 12)
  66 #define TTBCR_EPD0              (0 << 7)
  67 #define TTBCR                   (TTBCR_SHARED_NON | \
  68                                  TTBCR_ORGN0_NC | \
  69                                  TTBCR_IRGN0_NC | \
  70                                  TTBCR_USING_TTBR0 | \
  71                                  TTBCR_EAE)
  72
  73 /*
  74  * Memory region attributes for LPAE (defined in pgtable):
  75  *
  76  * n = AttrIndx[2:0]
  77  *
  78  *                            n       MAIR
  79  *      UNCACHED              000     00000000
  80  *      BUFFERABLE            001     01000100
  81  *      DEV_WC                001     01000100
  82  *      WRITETHROUGH          010     10101010
  83  *      WRITEBACK             011     11101110
  84  *      DEV_CACHED            011     11101110
  85  *      DEV_SHARED            100     00000100
  86  *      DEV_NONSHARED         100     00000100
  87  *      unused                101
  88  *      unused                110
  89  *      WRITEALLOC            111     11111111
  90  */
  91 #define MT_MAIR0                0xeeaa4400
  92 #define MT_MAIR1                0xff000004
  93 #define MT_STRONLY_ORDER        0
  94 #define MT_NORMAL_NC            1
  95 #define MT_DEVICE_MEM           4
  96 #define MT_NORMAL               7
  97
  98 /* The phy_addr must be aligned to 4KB */
  99 static inline void set_pgtable(u32 *page_table, u32 index, u32 phy_addr)
 100 {
 101         u32 value = phy_addr | PMD_TYPE_TABLE;
 102
 103         page_table[2 * index] = value;
 104         page_table[2 * index + 1] = 0;
 105 }
 106
 107 /* The phy_addr must be aligned to 4KB */
 108 static inline void set_pgsection(u32 *page_table, u32 index, u64 phy_addr,
 109                                  u32 memory_type)
 110 {
 111         u64 value;
 112
 113         value = phy_addr | PMD_TYPE_SECT | PMD_SECT_AF;
 114         value |= PMD_ATTRINDX(memory_type);
 115         page_table[2 * index] = value & 0xFFFFFFFF;
 116         page_table[2 * index + 1] = (value >> 32) & 0xFFFFFFFF;
 117 }
 118
 119 /*
 120  * Start MMU after DDR is available, we create MMU table in DRAM.
 121  * The base address of TTLB is gd->arch.tlb_addr. We use two
 122  * levels of translation tables here to cover 40-bit address space.
 123  *
 124  * The TTLBs are located at PHY 2G~4G.
 125  *
 126  * VA mapping:
 127  *
 128  *  -------  <---- 0GB
 129  * |       |
 130  * |       |
 131  * |-------| <---- 0x24000000
 132  * |///////|  ===> 192MB VA map for PCIe1 with offset 0x40_0000_0000
 133  * |-------| <---- 0x300000000
 134  * |       |
 135  * |-------| <---- 0x34000000
 136  * |///////|  ===> 192MB VA map for PCIe2 with offset 0x48_0000_0000
 137  * |-------| <---- 0x40000000
 138  * |       |
 139  * |-------| <---- 0x80000000 DDR0 space start
 140  * |\\\\\\\|
 141  *.|\\\\\\\|  ===> 2GB VA map for 2GB DDR0 Memory space
 142  * |\\\\\\\|
 143  *  -------  <---- 4GB DDR0 space end
 144  */
 145 static void mmu_setup(void)
 146 {
 147         u32 *level0_table = (u32 *)gd->arch.tlb_addr;
 148         u32 *level1_table = (u32 *)(gd->arch.tlb_addr + 0x1000);
 149         u64 va_start = 0;
 150         u32 reg;
 151         int i;
 152
 153         /* Level 0 Table 2-3 are used to map DDR */
 154         set_pgsection(level0_table, 3, 3 * BLOCK_SIZE_L1, MT_NORMAL);
 155         set_pgsection(level0_table, 2, 2 * BLOCK_SIZE_L1, MT_NORMAL);
 156         /* Level 0 Table 1 is used to map device */
 157         set_pgsection(level0_table, 1, 1 * BLOCK_SIZE_L1, MT_DEVICE_MEM);
 158         /* Level 0 Table 0 is used to map device including PCIe MEM */
 159         set_pgtable(level0_table, 0, (u32)level1_table);
 160
 161         /* Level 1 has 512 entries */
 162         for (i = 0; i < 512; i++) {
 163                 /* Mapping for PCIe 1 */
 164                 if (va_start >= CONFIG_SYS_PCIE1_VIRT_ADDR &&
 165                     va_start < (CONFIG_SYS_PCIE1_VIRT_ADDR +
 166                                  CONFIG_SYS_PCIE_MMAP_SIZE))
 167                         set_pgsection(level1_table, i,
 168                                       CONFIG_SYS_PCIE1_PHYS_BASE + va_start,
 169                                       MT_DEVICE_MEM);
 170                 /* Mapping for PCIe 2 */
 171                 else if (va_start >= CONFIG_SYS_PCIE2_VIRT_ADDR &&
 172                          va_start < (CONFIG_SYS_PCIE2_VIRT_ADDR +
 173                                      CONFIG_SYS_PCIE_MMAP_SIZE))
 174                         set_pgsection(level1_table, i,
 175                                       CONFIG_SYS_PCIE2_PHYS_BASE + va_start,
 176                                       MT_DEVICE_MEM);
 177                 else
 178                         set_pgsection(level1_table, i,
 179                                       va_start,
 180                                       MT_DEVICE_MEM);
 181                 va_start += BLOCK_SIZE_L2;
 182         }
 183
 184         asm volatile("dsb sy;isb");
 185         asm volatile("mcr p15, 0, %0, c2, c0, 2" /* Write RT to TTBCR */
 186                         : : "r" (TTBCR) : "memory");
 187         asm volatile("mcrr p15, 0, %0, %1, c2" /* TTBR 0 */
 188                         : : "r" ((u32)level0_table), "r" (0) : "memory");
 189         asm volatile("mcr p15, 0, %0, c10, c2, 0" /* write MAIR 0 */
 190                         : : "r" (MT_MAIR0) : "memory");
 191         asm volatile("mcr p15, 0, %0, c10, c2, 1" /* write MAIR 1 */
 192                         : : "r" (MT_MAIR1) : "memory");
 193
 194         /* Set the access control to all-supervisor */
 195         asm volatile("mcr p15, 0, %0, c3, c0, 0"
 196                      : : "r" (~0));
 197
 198         /* Enable the mmu */
 199         reg = get_cr();
 200         set_cr(reg | CR_M);
 201 }
 202
 203 /*
 204  * This function is called from lib/board.c. It recreates MMU
 205  * table in main memory. MMU and i/d-cache are enabled here.
 206  */
 207 void enable_caches(void)
 208 {
 209         /* Invalidate all TLB */
 210         mmu_page_table_flush(gd->arch.tlb_addr,
 211                              gd->arch.tlb_addr +  gd->arch.tlb_size);
 212         /* Set up and enable mmu */
 213         mmu_setup();
 214
 215         /* Invalidate & Enable d-cache */
 216         invalidate_dcache_all();
 217         set_cr(get_cr() | CR_C);
 218 }
 219 #endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
 220
 221 #if defined(CONFIG_DISPLAY_CPUINFO)
 222 int print_cpuinfo(void)
 223 {
 224         char buf1[32], buf2[32];
 225         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
 226         unsigned int svr, major, minor, ver, i;
 227
 228         svr = in_be32(&gur->svr);
 229         major = SVR_MAJ(svr);
 230         minor = SVR_MIN(svr);
 231
 232         puts("CPU:   Freescale LayerScape ");
 233
 234         ver = SVR_SOC_VER(svr);
 235         switch (ver) {
 236         case SOC_VER_SLS1020:
 237                 puts("SLS1020");
 238                 break;
 239         case SOC_VER_LS1020:
 240                 puts("LS1020");
 241                 break;
 242         case SOC_VER_LS1021:
 243                 puts("LS1021");
 244                 break;
 245         case SOC_VER_LS1022:
 246                 puts("LS1022");
 247                 break;
 248         default:
 249                 puts("Unknown");
 250                 break;
 251         }
 252
 253         if (IS_E_PROCESSOR(svr) && (ver != SOC_VER_SLS1020))
 254                 puts("E");
 255
 256         printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);
 257
 258         puts("Clock Configuration:");
 259
 260         printf("\n       CPU0(ARMV7):%-4s MHz, ", strmhz(buf1, gd->cpu_clk));
 261         printf("\n       Bus:%-4s MHz, ", strmhz(buf1, gd->bus_clk));
 262         printf("DDR:%-4s MHz (%s MT/s data rate), ",
 263                strmhz(buf1, gd->mem_clk/2), strmhz(buf2, gd->mem_clk));
 264         puts("\n");
 265
 266         /* Display the RCW, so that no one gets confused as to what RCW
 267          * we're actually using for this boot.
 268          */
 269         puts("Reset Configuration Word (RCW):");
 270         for (i = 0; i < ARRAY_SIZE(gur->rcwsr); i++) {
 271                 u32 rcw = in_be32(&gur->rcwsr[i]);
 272
 273                 if ((i % 4) == 0)
 274                         printf("\n       %08x:", i * 4);
 275                 printf(" %08x", rcw);
 276         }
 277         puts("\n");
 278
 279         return 0;
 280 }
 281 #endif
 282
 283 #ifdef CONFIG_FSL_ESDHC
 284 int cpu_mmc_init(bd_t *bis)
 285 {
 286         return fsl_esdhc_mmc_init(bis);
 287 }
 288 #endif
 289
 290 int cpu_eth_init(bd_t *bis)
 291 {
 292 #ifdef CONFIG_TSEC_ENET
 293         tsec_standard_init(bis);
 294 #endif
 295
 296         return 0;
 297 }
 298
 299 int arch_cpu_init(void)
 300 {
 301         void *epu_base = (void *)(CONFIG_SYS_DCSRBAR + EPU_BLOCK_OFFSET);
 302         void *rcpm2_base =
 303                 (void *)(CONFIG_SYS_DCSRBAR + DCSR_RCPM2_BLOCK_OFFSET);
 304         struct ccsr_scfg *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
 305         u32 state;
 306
 307         /*
 308          * The RCPM FSM state may not be reset after power-on.
 309          * So, reset them.
 310          */
 311         state = in_be32(rcpm2_base + DCSR_RCPM2_CPMFSMSR0) &
 312                 CPMFSMSR_FSM_STATE_MASK;
 313         if (state != 0) {
 314                 out_be32(rcpm2_base + DCSR_RCPM2_CPMFSMCR0, 0x80);
 315                 out_be32(rcpm2_base + DCSR_RCPM2_CPMFSMCR0, 0x0);
 316         }
 317
 318         state = in_be32(rcpm2_base + DCSR_RCPM2_CPMFSMSR1) &
 319                 CPMFSMSR_FSM_STATE_MASK;
 320         if (state != 0) {
 321                 out_be32(rcpm2_base + DCSR_RCPM2_CPMFSMCR1, 0x80);
 322                 out_be32(rcpm2_base + DCSR_RCPM2_CPMFSMCR1, 0x0);
 323         }
 324
 325         /*
 326          * After wakeup from deep sleep, Clear EPU registers
 327          * as early as possible to prevent from possible issue.
 328          * It's also safe to clear at normal boot.
 329          */
 330         fsl_epu_clean(epu_base);
 331
 332         setbits_be32(&scfg->snpcnfgcr, SCFG_SNPCNFGCR_SEC_RD_WR);
 333
 334         return 0;
 335 }
 336
 337 #ifdef CONFIG_ARMV7_NONSEC
 338 /* Set the address at which the secondary core starts from.*/
 339 void smp_set_core_boot_addr(unsigned long addr, int corenr)
 340 {
 341         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
 342
 343         out_be32(&gur->scratchrw[0], addr);
 344 }
 345
 346 /* Release the secondary core from holdoff state and kick it */
 347 void smp_kick_all_cpus(void)
 348 {
 349         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
 350
 351         out_be32(&gur->brrl, 0x2);
 352
 353         /*
 354          * LS1 STANDBYWFE is not captured outside the ARM module in the soc.
 355          * So add a delay to wait bootrom execute WFE.
 356          */
 357         udelay(1);
 358
 359         asm volatile("sev");
 360 }
 361 #endif
 362
 363 void reset_cpu(ulong addr)
 364 {
 365         struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
 366
 367         clrbits_be16(&wdog->wcr, WCR_SRS);
 368
 369         while (1) {
 370                 /*
 371                  * Let the watchdog trigger
 372                  */
 373         }
 374 }
 375
 376 void arch_preboot_os(void)
 377 {
 378         unsigned long ctrl;
 379
 380         /* Disable PL1 Physical Timer */
 381         asm("mrc p15, 0, %0, c14, c2, 1" : "=r" (ctrl));
 382         ctrl &= ~ARCH_TIMER_CTRL_ENABLE;
 383         asm("mcr p15, 0, %0, c14, c2, 1" : : "r" (ctrl));
 384 }