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https://github.com/brain-hackers/u-boot-brain
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56844a22b7
Commit 2a1a2cb6 didnt remove the dummy mem reservation in fdt_chosen,
and this stopped Linux from booting with a Ramdisk. This patch fixes
this, by deleting the useless dummy mem reservation.
When booting with a Ramdisk, a fix offset FDT_RAMDISK_OVERHEAD is now
added to of_size, so we dont need anymore a dummy mem reservation.
I measured the value of FDT_RAMDISK_OVERHEAD on a MPC8270 based
system (=0x44 bytes) and rounded it up to 0x80).
Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#ifndef _FDT_H
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#define _FDT_H
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#ifndef __ASSEMBLY__
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struct fdt_header {
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uint32_t magic; /* magic word FDT_MAGIC */
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uint32_t totalsize; /* total size of DT block */
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uint32_t off_dt_struct; /* offset to structure */
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uint32_t off_dt_strings; /* offset to strings */
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uint32_t off_mem_rsvmap; /* offset to memory reserve map */
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uint32_t version; /* format version */
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uint32_t last_comp_version; /* last compatible version */
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/* version 2 fields below */
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uint32_t boot_cpuid_phys; /* Which physical CPU id we're
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booting on */
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/* version 3 fields below */
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uint32_t size_dt_strings; /* size of the strings block */
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/* version 17 fields below */
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uint32_t size_dt_struct; /* size of the structure block */
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};
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struct fdt_reserve_entry {
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uint64_t address;
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uint64_t size;
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};
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struct fdt_node_header {
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uint32_t tag;
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char name[0];
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};
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struct fdt_property {
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uint32_t tag;
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uint32_t len;
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uint32_t nameoff;
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char data[0];
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};
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#endif /* !__ASSEMBLY */
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#define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
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#define FDT_TAGSIZE sizeof(uint32_t)
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#define FDT_BEGIN_NODE 0x1 /* Start node: full name */
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#define FDT_END_NODE 0x2 /* End node */
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#define FDT_PROP 0x3 /* Property: name off,
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size, content */
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#define FDT_NOP 0x4 /* nop */
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#define FDT_END 0x9
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#define FDT_V1_SIZE (7*sizeof(uint32_t))
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#define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(uint32_t))
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#define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(uint32_t))
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#define FDT_V16_SIZE FDT_V3_SIZE
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#define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(uint32_t))
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/* adding a ramdisk needs 0x44 bytes in version 2008.10 */
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#define FDT_RAMDISK_OVERHEAD 0x80
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#endif /* _FDT_H */
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