LXR uboot/arch/powerpc/cpu/mpc86xx/cpu.c

   1/*
   2 * Copyright 2006,2009-2010 Freescale Semiconductor, Inc.
   3 * Jeff Brown
   4 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8
   9#include <common.h>
  10#include <watchdog.h>
  11#include <command.h>
  12#include <asm/cache.h>
  13#include <asm/mmu.h>
  14#include <mpc86xx.h>
  15#include <asm/fsl_law.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19/*
  20 * Default board reset function
  21 */
  22static void
  23__board_reset(void)
  24{
  25        /* Do nothing */
  26}
  27void board_reset(void) __attribute__((weak, alias("__board_reset")));
  28
  29
  30int
  31checkcpu(void)
  32{
  33        sys_info_t sysinfo;
  34        uint pvr, svr;
  35        uint major, minor;
  36        char buf1[32], buf2[32];
  37        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  38        volatile ccsr_gur_t *gur = &immap->im_gur;
  39        struct cpu_type *cpu;
  40        uint msscr0 = mfspr(MSSCR0);
  41
  42        svr = get_svr();
  43        major = SVR_MAJ(svr);
  44        minor = SVR_MIN(svr);
  45
  46        if (cpu_numcores() > 1) {
  47#ifndef CONFIG_MP
  48                puts("Unicore software on multiprocessor system!!\n"
  49                     "To enable mutlticore build define CONFIG_MP\n");
  50#endif
  51        }
  52        puts("CPU:   ");
  53
  54        cpu = gd->arch.cpu;
  55
  56        puts(cpu->name);
  57
  58        printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);
  59        puts("Core:  ");
  60
  61        pvr = get_pvr();
  62        major = PVR_E600_MAJ(pvr);
  63        minor = PVR_E600_MIN(pvr);
  64
  65        printf("e600 Core %d", (msscr0 & 0x20) ? 1 : 0);
  66        if (gur->pordevsr & MPC86xx_PORDEVSR_CORE1TE)
  67                puts("\n    Core1Translation Enabled");
  68        debug(" (MSSCR0=%x, PORDEVSR=%x)", msscr0, gur->pordevsr);
  69
  70        printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);
  71
  72        get_sys_info(&sysinfo);
  73
  74        puts("Clock Configuration:\n");
  75        printf("       CPU:%-4s MHz, ", strmhz(buf1, sysinfo.freq_processor));
  76        printf("MPX:%-4s MHz\n", strmhz(buf1, sysinfo.freq_systembus));
  77        printf("       DDR:%-4s MHz (%s MT/s data rate), ",
  78                strmhz(buf1, sysinfo.freq_systembus / 2),
  79                strmhz(buf2, sysinfo.freq_systembus));
  80
  81        if (sysinfo.freq_localbus > LCRR_CLKDIV) {
  82                printf("LBC:%-4s MHz\n", strmhz(buf1, sysinfo.freq_localbus));
  83        } else {
  84                printf("LBC: unknown (LCRR[CLKDIV] = 0x%02lx)\n",
  85                       sysinfo.freq_localbus);
  86        }
  87
  88        puts("L1:    D-cache 32 KiB enabled\n");
  89        puts("       I-cache 32 KiB enabled\n");
  90
  91        puts("L2:    ");
  92        if (get_l2cr() & 0x80000000) {
  93#if defined(CONFIG_MPC8610)
  94                puts("256");
  95#elif defined(CONFIG_MPC8641)
  96                puts("512");
  97#endif
  98                puts(" KiB enabled\n");
  99        } else {
 100                puts("Disabled\n");
 101        }
 102
 103        return 0;
 104}
 105
 106
 107int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 108{
 109        volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 110        volatile ccsr_gur_t *gur = &immap->im_gur;
 111
 112        /* Attempt board-specific reset */
 113        board_reset();
 114
 115        /* Next try asserting HRESET_REQ */
 116        out_be32(&gur->rstcr, MPC86xx_RSTCR_HRST_REQ);
 117
 118        while (1)
 119                ;
 120
 121        return 1;
 122}
 123
 124
 125/*
 126 * Get timebase clock frequency
 127 */
 128unsigned long
 129get_tbclk(void)
 130{
 131        sys_info_t sys_info;
 132
 133        get_sys_info(&sys_info);
 134        return (sys_info.freq_systembus + 3L) / 4L;
 135}
 136
 137
 138#if defined(CONFIG_WATCHDOG)
 139void
 140watchdog_reset(void)
 141{
 142#if defined(CONFIG_MPC8610)
 143        /*
 144         * This actually feed the hard enabled watchdog.
 145         */
 146        volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 147        volatile ccsr_wdt_t *wdt = &immap->im_wdt;
 148        volatile ccsr_gur_t *gur = &immap->im_gur;
 149        u32 tmp = gur->pordevsr;
 150
 151        if (tmp & 0x4000) {
 152                wdt->swsrr = 0x556c;
 153                wdt->swsrr = 0xaa39;
 154        }
 155#endif
 156}
 157#endif  /* CONFIG_WATCHDOG */
 158
 159/*
 160 * Print out the state of various machine registers.
 161 * Currently prints out LAWs, BR0/OR0, and BATs
 162 */
 163void mpc86xx_reginfo(void)
 164{
 165        print_bats();
 166        print_laws();
 167        print_lbc_regs();
 168}
 169
 170/*
 171 * Set the DDR BATs to reflect the actual size of DDR.
 172 *
 173 * dram_size is the actual size of DDR, in bytes
 174 *
 175 * Note: we assume that CONFIG_MAX_MEM_MAPPED is 2G or smaller as we only
 176 * are using a single BAT to cover DDR.
 177 *
 178 * If this is not true, (e.g. CONFIG_MAX_MEM_MAPPED is 2GB but HID0_XBSEN
 179 * is not defined) then we might have a situation where U-Boot will attempt
 180 * to relocated itself outside of the region mapped by DBAT0.
 181 * This will cause a machine check.
 182 *
 183 * Currently we are limited to power of two sized DDR since we only use a
 184 * single bat.  If a non-power of two size is used that is less than
 185 * CONFIG_MAX_MEM_MAPPED u-boot will crash.
 186 *
 187 */
 188void setup_ddr_bat(phys_addr_t dram_size)
 189{
 190        unsigned long batu, bl;
 191
 192        bl = TO_BATU_BL(min(dram_size, CONFIG_MAX_MEM_MAPPED));
 193
 194        if (BATU_SIZE(bl) != dram_size) {
 195                u64 sz = (u64)dram_size - BATU_SIZE(bl);
 196                print_size(sz, " left unmapped\n");
 197        }
 198
 199        batu = bl | BATU_VS | BATU_VP;
 200        write_bat(DBAT0, batu, CONFIG_SYS_DBAT0L);
 201        write_bat(IBAT0, batu, CONFIG_SYS_IBAT0L);
 202}
 203