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/*
* Copyright (c) 2011, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __I386_H__
#define __I386_H__
#define EFI_LOADER_SIGNATURE "EL32"
static inline void kernel_jump(EFI_PHYSICAL_ADDRESS kernel_start,
struct boot_params *boot_params)
{
asm volatile ("cli \n"
"movl %0, %%esi \n"
"movl %1, %%ecx \n"
"jmp *%%ecx \n"
:: "m" (boot_params), "m" (kernel_start));
}
typedef void(*handover_func)(void *, EFI_SYSTEM_TABLE *,
struct boot_params *) __attribute__((regparm(0)));
static inline void handover_jump(UINT16 kernel_version, EFI_HANDLE image,
struct boot_params *bp,
EFI_PHYSICAL_ADDRESS kernel_start)
{
kernel_start += bp->hdr.handover_offset;
if (kernel_version == 0x20b) {
asm volatile ("cli \n"
"pushl %0 \n"
"pushl %1 \n"
"pushl %2 \n"
"movl %3, %%ecx \n"
"jmp *%%ecx \n"
:: "m" (bp), "m" (ST),
"m" (image), "m" (kernel_start));
} else {
handover_func hf = (handover_func)(UINTN)kernel_start;
hf(image, ST, bp);
}
}
#endif /* __I386_H__ */
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