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arch/x86: initial Intel64 bootstrap framework

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This patch adds basic build infrastructure, definitions, a linker
script, etc. to use the Zephyr and 0.10.1 SDK to build a 64-bit
ELF binary suitable for use with GRUB to minimally bootstrap an
Apollo Lake (e.g., UpSquared) board. The resulting binary can hardly
be called a Zephyr kernel as it is lacking most of the glue logic,
but it is a starting point to flesh those out in the x86 tree.

The "kernel" builds with a few harmless warnings, both with GCC from
the Zephyr SDK and with ICC (which is currently being worked on in
a separate branch). These warnings are either related to pointer size
differences (since this is an LP64 build) and/or dummy functions
that will be replaced with working versions shortly.

Signed-off-by: Charles E. Youse <charles.youse@intel.com>
This commit is contained in:
Charles E. Youse 2019-07-04 13:49:06 -07:00 • committed by Andrew Boie
commit 34307a54f0
10 changed files with 291 additions and 1 deletions
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17
arch/x86/include/intel64/kernel_arch_func.h
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@ -6,4 +6,21 @@
#ifndef ZEPHYR_ARCH_X86_INCLUDE_INTEL64_KERNEL_ARCH_FUNC_H_
#define ZEPHYR_ARCH_X86_INCLUDE_INTEL64_KERNEL_ARCH_FUNC_H_
#ifndef _ASMLANGUAGE
#define z_is_in_isr() (0)
static ALWAYS_INLINE void
z_set_thread_return_value(struct k_thread *thread, unsigned int value)
{
/* nothing */ ;
}
static inline void kernel_arch_init(void)
{
/* nothing */ ;
}
#endif /* _ASMLANGUAGE */
#endif /* ZEPHYR_ARCH_X86_INCLUDE_INTEL64_KERNEL_ARCH_FUNC_H_ */