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authorStefan Reinauer <stefan.reinauer@coreboot.org>2015-07-13 09:39:15 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2015-07-13 21:04:56 +0200
commit6cb3a59fd5e754c3627b79db21c5bcc284bfd721 (patch)
treee83db5b11ee4a29d496dcf2798d024b6b8455ab7 /src/arch/x86/lib/walkcbfs.S
parent9693885ad88d21ead7bd9ebc32f3e4901841b18b (diff)
x86: flatten hierarchy
It never made sense to have bootblock_* in init, but pirq_routing.c in boot, and some ld scripts on the main level while others live in subdirectories. This patch flattens the directory hierarchy and makes x86 more similar to the other architectures. Change-Id: I4056038fe7813e4d3d3042c441e7ab6076a36384 Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: http://review.coreboot.org/10901 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/arch/x86/lib/walkcbfs.S')
-rw-r--r--src/arch/x86/lib/walkcbfs.S117
1 files changed, 0 insertions, 117 deletions
diff --git a/src/arch/x86/lib/walkcbfs.S b/src/arch/x86/lib/walkcbfs.S
deleted file mode 100644
index 60eb8b53b0..0000000000
--- a/src/arch/x86/lib/walkcbfs.S
+++ /dev/null
@@ -1,117 +0,0 @@
-#define CBFS_HEADER_PTR 0xfffffffc
-
-#define CBFS_HEADER_MAGIC 0
-#define CBFS_HEADER_VERSION (CBFS_HEADER_MAGIC + 4)
-#define CBFS_HEADER_ROMSIZE (CBFS_HEADER_VERSION + 4)
-#define CBFS_HEADER_BOOTBLOCKSIZE (CBFS_HEADER_ROMSIZE + 4)
-#define CBFS_HEADER_ALIGN (CBFS_HEADER_BOOTBLOCKSIZE + 4)
-#define CBFS_HEADER_OFFSET (CBFS_HEADER_ALIGN + 4)
-
-#define CBFS_FILE_MAGIC 0
-#define CBFS_FILE_LEN (CBFS_FILE_MAGIC + 8)
-#define CBFS_FILE_TYPE (CBFS_FILE_LEN + 4)
-#define CBFS_FILE_CHECKSUM (CBFS_FILE_TYPE + 4)
-#define CBFS_FILE_OFFSET (CBFS_FILE_CHECKSUM + 4)
-
-#define CBFS_FILE_STRUCTSIZE (CBFS_FILE_OFFSET + 4)
-
-/*
- * input %esi: filename
- * input %esp: return address (not pointer to return address!)
- * output %eax: pointer to CBFS header
- * clobbers %ebx, %ecx, %edi
- */
-walkcbfs_asm:
- cld
-
- mov CBFS_HEADER_PTR, %eax
- mov CBFS_HEADER_ROMSIZE(%eax), %ecx
- bswap %ecx
- mov $0, %ebx
- sub %ecx, %ebx /* rom base address in ebx */
- mov CBFS_HEADER_OFFSET(%eax), %ecx
- bswap %ecx
- add %ecx, %ebx /* address where we start looking for LARCHIVEs */
-
- /* determine filename length */
- mov $0, %eax
-1:
- cmpb $0, (%eax,%esi)
- jz 2f
- add $1, %eax
- jmp 1b
-2:
- add $1, %eax
-walker:
- mov 0(%ebx), %edi /* Check for LARCHIVE header */
- cmp %edi, filemagic
- jne searchfile
- mov 4(%ebx), %edi
- cmp %edi, filemagic+4
- jne searchfile
-
- /* LARCHIVE header found */
- mov %ebx, %edi
- add $CBFS_FILE_STRUCTSIZE, %edi /* edi = address of first byte after struct cbfs_file */
- mov %eax, %ecx
- repe cmpsb
- /* zero flag set if strings are equal */
- jnz tryharder
-
- /* we found it! */
- mov %ebx, %eax
- jmp *%esp
-
-tryharder:
- sub %ebx, %edi
- sub $CBFS_FILE_STRUCTSIZE, %edi /* edi = # of walked bytes */
- sub %edi, %esi /* esi = start of filename */
-
- /* ebx = ecx = (current+offset+len+ALIGN-1) & ~(ALIGN-1) */
- mov CBFS_FILE_OFFSET(%ebx), %ecx
- bswap %ecx
- add %ebx, %ecx
- mov CBFS_FILE_LEN(%ebx), %edi
- bswap %edi
- add %edi, %ecx
- mov CBFS_HEADER_PTR, %edi
- mov CBFS_HEADER_ALIGN(%edi), %edi
- bswap %edi
- sub $1, %edi
- add %edi, %ecx
- not %edi
- and %edi, %ecx
-
- /* if oldaddr >= addr, leave */
- cmp %ebx, %ecx
- jbe out
-
- mov %ecx, %ebx
-
-check_for_exit:
- /* look if we should exit: did we pass into the bootblock already? */
- mov CBFS_HEADER_PTR, %ecx
- mov CBFS_HEADER_BOOTBLOCKSIZE(%ecx), %ecx
- bswap %ecx
- not %ecx
- add $1, %ecx
-
- cmp %ecx, %ebx
- /* if bootblockstart >= addr (==we're still in the data area) , jump back */
- jbe walker
-
-out:
- mov $0, %eax
- jmp *%esp
-
-
-searchfile:
- /* if filemagic isn't found, move forward cbfs_header->align bytes */
- mov CBFS_HEADER_PTR, %edi
- mov CBFS_HEADER_ALIGN(%edi), %edi
- bswap %edi
- add %edi, %ebx
- jmp check_for_exit
-
-filemagic:
- .ascii "LARCHIVE"