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| author | Jon Loeliger <jdl@freescale.com> | 2006-08-22 10:17:59 -0500 |
|---|---|---|
| committer | Jon Loeliger <jdl@freescale.com> | 2006-08-22 10:17:59 -0500 |
| commit | 4b7576fb804f9aae275a9ad5d947d2eb727d8cb7 (patch) | |
| tree | 56a964216b21901d6279069086f713170805864f /cpu/i386/sc520_asm.S | |
| parent | 5de62c47a8628b3da4d73f7c07027f32a3342d40 (diff) | |
| parent | 5196a7a03bc436435787e1ad7044af94d93a5448 (diff) | |
| download | u-boot-imx-4b7576fb804f9aae275a9ad5d947d2eb727d8cb7.zip u-boot-imx-4b7576fb804f9aae275a9ad5d947d2eb727d8cb7.tar.gz u-boot-imx-4b7576fb804f9aae275a9ad5d947d2eb727d8cb7.tar.bz2 | |
Merge branch 'master' of http://www.denx.de/git/u-boot
Diffstat (limited to 'cpu/i386/sc520_asm.S')
| -rw-r--r-- | cpu/i386/sc520_asm.S | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/cpu/i386/sc520_asm.S b/cpu/i386/sc520_asm.S index 80464fa..e1fa37a 100644 --- a/cpu/i386/sc520_asm.S +++ b/cpu/i386/sc520_asm.S @@ -113,6 +113,7 @@ .equ DRCCFG, 0x0fffef014 /* DRAM bank configuration register */ .equ DRCBENDADR, 0x0fffef018 /* DRAM bank ending address register */ .equ ECCCTL, 0x0fffef020 /* DRAM ECC control register */ +.equ ECCINT, 0x0fffefd18 /* DRAM ECC nmi-INT mapping */ .equ DBCTL, 0x0fffef040 /* DRAM buffer control register */ .equ CACHELINESZ, 0x00000010 /* size of our cache line (read buffer) */ @@ -459,6 +460,12 @@ emptybank: incl %edi loop cleanuplp +#if defined CFG_SDRAM_DRCTMCTL + /* just have your hardware desinger _GIVE_ you what you need here! */ + movl $DRCTMCTL, %edi + movb $CFG_SDRAM_DRCTMCTL,%al + movb (%edi), %al +#else #if defined(CFG_SDRAM_CAS_LATENCY_2T) || defined(CFG_SDRAM_CAS_LATENCY_3T) /* set the CAS latency now since it is hard to do * when we run from the RAM */ @@ -470,7 +477,8 @@ emptybank: #ifdef CFG_SDRAM_CAS_LATENCY_3T orb $0x10, %al #endif - movb %al, (%edi) + movb %al, (%edi) +#endif #endif movl $DRCCTL, %edi /* DRAM Control register */ movb $0x3,%al /* Load mode register cmd */ @@ -528,9 +536,49 @@ bank0: movl (%edi), %eax shll $22, %eax movl %eax, %ebx -done: movl %ebx, %eax +done: + movl %ebx, %eax + +#if CFG_SDRAM_ECC_ENABLE + /* A nominal memory test: just a byte at each address line */ + movl %eax, %ecx + shrl $0x1, %ecx + movl $0x1, %edi +memtest0: + movb $0xa5, (%edi) + cmpb $0xa5, (%edi) + jne out + shrl $1, %ecx + andl %ecx,%ecx + jz set_ecc + shll $1, %edi + jmp memtest0 + +set_ecc: + /* clear all ram with a memset */ + movl %eax, %ecx + xorl %esi, %esi + xorl %edi, %edi + xorl %eax, %eax + shrl $2, %ecx + cld + rep stosl + /* enable read, write buffers */ + movb $0x11, %al + movl $DBCTL, %edi + movb %al, (%edi) + /* enable NMI mapping for ECC */ + movl $ECCINT, %edi + mov $0x10, %al + movb %al, (%edi) + /* Turn on ECC */ + movl $ECCCTL, %edi + mov $0x05, %al + movb %al, (%edi) +#endif +out: + movl %ebx, %eax jmp *%ebp - #endif /* CONFIG_SC520 */ |