I have a custom board with an MPC8540 processor. U-Boot always ends up at 0xfff81400 (DataTLBError). I traced it through and found that the first time it enters DataTLBError is at the end of _start (in cpu/mpc85xx/start.S) in the loop (1:) where it is allocating the Initial RAM in data cache. I traped the CPU before that loop and then I placed an infinite loop right after that loop and it never gets there. I then traced back into _start right after that loop and told it to run again, and it went back into DataTLBError at a later point in the code. So is this a problem with my tlb1_entry table? I also read online that there was a patch submitted on 6/17/2004 to fix this, do I need this? I updated my U-Boot development tree today over CVS. Is that patch already in there? Any help would be greatly appreciated. Here is my tbl1_entry. All I did was alter the MPC8540ADS init.S file to get mine (I don't have any BCSRs or SDRAM on the LBC).
tlb1_entry: entry_start
/* * Number of TLB0 and TLB1 entries in the following table */ .long 12
#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR) /* * TLB0 4K Non-cacheable, guarded * 0xff700000 4K Initial CCSRBAR mapping * * This ends up at a TLB0 Index==0 entry, and must not collide * with other TLB0 Entries. */ .long TLB1_MAS0(0, 0, 0) .long TLB1_MAS1(1, 0, 0, 0, 0) .long TLB1_MAS2(E500_TLB_EPN(CFG_CCSRBAR_DEFAULT), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_CCSRBAR_DEFAULT), 0,0,0,0,0,1,0,1,0,1) #else #error("Update the number of table entries in tlb1_entry") #endif
/* * TLB0 16K Cacheable, non-guarded * 0xd001_0000 16K Temporary Global data for initialization * * Use four 4K TLB0 entries. These entries must be cacheable * as they provide the bootstrap memory before the memory * controler and real memory have been configured. * * These entries end up at TLB0 Indicies 0x10, 0x14, 0x18 and 0x1c, * and must not collide with other TLB0 entries. */ .long TLB1_MAS0(0, 0, 0) .long TLB1_MAS1(1, 0, 0, 0, 0) .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR), 0,0,0,0,0,0,0,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR), 0,0,0,0,0,1,0,1,0,1)
.long TLB1_MAS0(0, 0, 0) .long TLB1_MAS1(1, 0, 0, 0, 0) .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR + 4 * 1024), 0,0,0,0,0,0,0,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR + 4 * 1024), 0,0,0,0,0,1,0,1,0,1)
.long TLB1_MAS0(0, 0, 0) .long TLB1_MAS1(1, 0, 0, 0, 0) .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR + 8 * 1024), 0,0,0,0,0,0,0,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR + 8 * 1024), 0,0,0,0,0,1,0,1,0,1)
.long TLB1_MAS0(0, 0, 0) .long TLB1_MAS1(1, 0, 0, 0, 0) .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR + 12 * 1024), 0,0,0,0,0,0,0,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR + 12 * 1024), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 0: 64M Non-cacheable, guarded * 0xfc000000 64M FLASH (First Half) * Out of reset this entry is only 4K. */ .long TLB1_MAS0(1, 0, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_64M) .long TLB1_MAS2(E500_TLB_EPN(CFG_FLASH_BASE), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_FLASH_BASE), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 1: 64M Non-cacheable, guarded * 0xf8000000 64M FLASH (Second Half) */ .long TLB1_MAS0(1, 1, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_64M) .long TLB1_MAS2(E500_TLB_EPN(CFG_FLASH_BASE + 0x04000000), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_FLASH_BASE + 0x04000000), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 2: 256M Non-cacheable, guarded * 0x80000000 256M PCI1 MEM First half */ .long TLB1_MAS0(1, 2, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M) .long TLB1_MAS2(E500_TLB_EPN(CFG_PCI1_MEM_BASE), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_PCI1_MEM_BASE), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 3: 256M Non-cacheable, guarded * 0x90000000 256M PCI1 MEM Second half */ .long TLB1_MAS0(1, 3, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M) .long TLB1_MAS2(E500_TLB_EPN(CFG_PCI1_MEM_BASE + 0x10000000), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_PCI1_MEM_BASE + 0x10000000), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 4: 256M Non-cacheable, guarded * 0xc0000000 256M Rapid IO MEM First half */ .long TLB1_MAS0(1, 4, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M) .long TLB1_MAS2(E500_TLB_EPN(CFG_RIO_MEM_BASE), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_RIO_MEM_BASE), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 5: 256M Non-cacheable, guarded * 0xd0000000 256M Rapid IO MEM Second half */ .long TLB1_MAS0(1, 5, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M) .long TLB1_MAS2(E500_TLB_EPN(CFG_RIO_MEM_BASE + 0x10000000), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_RIO_MEM_BASE + 0x10000000), 0,0,0,0,0,1,0,1,0,1)
/* * TLB 6: 64M Non-cacheable, guarded * 0xe000_0000 1M CCSRBAR * 0xe200_0000 16M PCI1 IO */ .long TLB1_MAS0(1, 6, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_64M) .long TLB1_MAS2(E500_TLB_EPN(CFG_CCSRBAR), 0,0,0,0,1,0,1,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_CCSRBAR), 0,0,0,0,0,1,0,1,0,1)
#if !defined(CONFIG_SPD_EEPROM) /* * TLB 7: 256M DDR * 0x00000000 256M DDR System memory * Without SPD EEPROM configured DDR, this must be setup manually. * Make sure the TLB count at the top of this table is correct. * Likely it needs to be increased by two for these entries. */ #error("Update the number of table entries in tlb1_entry") .long TLB1_MAS0(1, 8, 0) .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M) .long TLB1_MAS2(E500_TLB_EPN(CFG_DDR_SDRAM_BASE), 0,0,0,0,0,0,0,0) .long TLB1_MAS3(E500_TLB_RPN(CFG_DDR_SDRAM_BASE), 0,0,0,0,0,1,0,1,0,1) #endif
entry_end
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