diff options
Diffstat (limited to 'board/amcc/sequoia/init.S')
| -rw-r--r-- | board/amcc/sequoia/init.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/board/amcc/sequoia/init.S b/board/amcc/sequoia/init.S index 4452d26cd..3c0e400f9 100644 --- a/board/amcc/sequoia/init.S +++ b/board/amcc/sequoia/init.S @@ -43,12 +43,19 @@ tlbtab: /* vxWorks needs this as first entry for the Machine Check interrupt */ tlbentry( 0x40000000, SZ_256M, 0, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) + /* + * The RAM-boot version skips the SDRAM TLB (identified by EPN=0). This + * entry is already configured for SDRAM via the JTAG debugger and mustn't + * be re-initialized by this RAM-booting U-Boot version. + */ +#ifndef CONFIG_SYS_RAMBOOT /* TLB-entry for DDR SDRAM (Up to 2GB) */ #ifdef CONFIG_4xx_DCACHE tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G) #else tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) #endif +#endif /* CONFIG_SYS_RAMBOOT */ /* TLB-entry for EBC */ tlbentry( CONFIG_SYS_BCSR_BASE, SZ_256M, CONFIG_SYS_BCSR_BASE, 1, AC_R|AC_W|AC_X|SA_G|SA_I ) |