LXR linux/arch/blackfin/mach-common/arch

   1/*
   2 * Do some checking to make sure things are OK
   3 *
   4 * Copyright 2007-2010 Analog Devices Inc.
   5 *
   6 * Licensed under the GPL-2 or later.
   7 */
   8
   9#include <asm/fixed_code.h>
  10#include <mach/anomaly.h>
  11#include <asm/clocks.h>
  12
  13#ifdef CONFIG_BFIN_KERNEL_CLOCK
  14
  15# if (CONFIG_VCO_HZ > CONFIG_MAX_VCO_HZ)
  16#  error "VCO selected is more than maximum value. Please change the VCO multipler"
  17# endif
  18
  19# if (CONFIG_SCLK_HZ > CONFIG_MAX_SCLK_HZ)
  20# error "Sclk value selected is more than maximum. Please select a proper value for SCLK multiplier"
  21# endif
  22
  23# if (CONFIG_SCLK_HZ < CONFIG_MIN_SCLK_HZ)
  24# error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
  25# endif
  26
  27# if (ANOMALY_05000273) && (CONFIG_SCLK_HZ * 2 > CONFIG_CCLK_HZ)
  28# error "ANOMALY 05000273, please make sure CCLK is at least 2x SCLK"
  29# endif
  30
  31# if (CONFIG_SCLK_HZ > CONFIG_CCLK_HZ) && (CONFIG_SCLK_HZ != CONFIG_CLKIN_HZ) && (CONFIG_CCLK_HZ != CONFIG_CLKIN_HZ)
  32# error "Please select sclk less than cclk"
  33# endif
  34
  35#endif /* CONFIG_BFIN_KERNEL_CLOCK */
  36
  37#if CONFIG_BOOT_LOAD < FIXED_CODE_END
  38# error "The kernel load address must be after the fixed code section"
  39#endif
  40
  41#if (CONFIG_BOOT_LOAD & 0x3)
  42# error "The kernel load address must be 4 byte aligned"
  43#endif
  44
  45/* The entire kernel must be able to make a 24bit pcrel call to start of L1 */
  46#if ((0xffffffff - L1_CODE_START + 1) + CONFIG_BOOT_LOAD) > 0x1000000
  47# error "The kernel load address is too high; keep it below 10meg for safety"
  48#endif
  49
  50#if ANOMALY_05000263 && defined(CONFIG_MPU)
  51# error the MPU will not function safely while Anomaly 05000263 applies
  52#endif
  53
  54#if ANOMALY_05000448
  55# error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes.
  56#endif
  57
  58/* if 220 exists, can not set External Memory WB and L2 not_cached, either External Memory not_cached and L2 WB */
  59#if ANOMALY_05000220 && \
  60        (defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK))
  61# error "Anomaly 05000220 does not allow you to use Write Back cache with L2 or External Memory"
  62#endif
  63
  64#if ANOMALY_05000491 && !defined(CONFIG_ICACHE_FLUSH_L1)
  65# error You need IFLUSH in L1 inst while Anomaly 05000491 applies
  66#endif
  67