From 5ff54a875642962fc857cee00bde17f9a465f1fa Mon Sep 17 00:00:00 2001 From: Bradley Morgan Date: Sun, 4 Oct 2026 10:42:10 +0000 Subject: tashaboot: arm64 bootloader holy shit it's here, Tashaboot, based from arm arm, enjoy reading this masterpiece Signed-off-by: Bradley Morgan --- include/endian.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 include/endian.h (limited to 'include/endian.h') diff --git a/include/endian.h b/include/endian.h new file mode 100644 index 0000000..42f880c --- /dev/null +++ b/include/endian.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * endian.h - byte order swaps. arm64 and ppc64le are both little + * endian, so the macros compile to nothing there, but the big endian + * fallbacks stay so a BE target builds without a rewrite. + * + * Copyright (C) 2026 Bradley Morgan + */ + +#ifndef __ENDIAN_H +#define __ENDIAN_H + +#include + +static inline uint16_t __swap16(uint16_t x) +{ + return (uint16_t)((x << 8) | (x >> 8)); +} + +static inline uint32_t __swap32(uint32_t x) +{ + return ((x << 24) | + ((x & 0xff00) << 8) | + ((x & 0xff0000) >> 8) | + (x >> 24)); +} + +static inline uint64_t __swap64(uint64_t x) +{ + return ((uint64_t)__swap32((uint32_t)x) << 32) | + __swap32((uint32_t)(x >> 32)); +} + +#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + +#define le16_to_cpu(x) __swap16(x) +#define le32_to_cpu(x) __swap32(x) +#define le64_to_cpu(x) __swap64(x) +#define cpu_to_le16(x) __swap16(x) +#define cpu_to_le32(x) __swap32(x) +#define cpu_to_le64(x) __swap64(x) + +#else + +#define le16_to_cpu(x) (x) +#define le32_to_cpu(x) (x) +#define le64_to_cpu(x) (x) +#define cpu_to_le16(x) (x) +#define cpu_to_le32(x) (x) +#define cpu_to_le64(x) (x) + +#endif + +#endif -- cgit v1.2.3