5d591e14ef
To use barebox as a BIOS based bootloader for x86 architectures, the binary must be patched to get it bootstrapped at runtime. The 'setupmbr' tool installs the barebox-binary to the given device node or image file and patch it in accordance to the needed sector information at runtime. Signed-off by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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/* we need the one from the host */
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#include <endian.h>
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#include <stdint.h>
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/* Byte-orders. */
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#define swap16(x) \
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({ \
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uint16_t _x = (x); \
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(uint16_t) ((_x << 8) | (_x >> 8)); \
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})
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#define swap32(x) \
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({ \
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uint32_t _x = (x); \
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(uint32_t) ((_x << 24) \
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| ((_x & (uint32_t) 0xFF00UL) << 8) \
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| ((_x & (uint32_t) 0xFF0000UL) >> 8) \
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| (_x >> 24)); \
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})
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#define swap64(x) \
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({ \
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uint64_t _x = (x); \
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(uint64_t) ((_x << 56) \
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| ((_x & (uint64_t) 0xFF00ULL) << 40) \
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| ((_x & (uint64_t) 0xFF0000ULL) << 24) \
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| ((_x & (uint64_t) 0xFF000000ULL) << 8) \
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| ((_x & (uint64_t) 0xFF00000000ULL) >> 8) \
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| ((_x & (uint64_t) 0xFF0000000000ULL) >> 24) \
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| ((_x & (uint64_t) 0xFF000000000000ULL) >> 40) \
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| (_x >> 56)); \
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})
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#if __BYTE_ORDER == __BIG_ENDIAN
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/* Our target is a ia32 machine, always little endian */
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# define host2target_16(x) swap16(x)
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# define host2target_32(x) swap32(x)
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# define host2target_64(x) swap64(x)
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# define target2host_16(x) swap16(x)
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# define target2host_32(x) swap32(x)
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# define target2host_64(x) swap64(x)
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#else
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# define host2target_16(x) (x)
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# define host2target_32(x) (x)
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# define host2target_64(x) (x)
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# define target2host_16(x) (x)
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# define target2host_32(x) (x)
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# define target2host_64(x) (x)
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#endif
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