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arch/x86: initial Intel64 support

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First "complete" version of Intel64 support for x86. Compilation of
apps for supported boards (read: up_squared) with CONFIG_X86_LONGMODE=y
is now working. Booting, device drivers, interrupts, scheduling, etc.
appear to be functioning properly. Beware that this is ALHPA quality,
not ready for production use, but the port has advanced far enough that
it's time to start working through the test suite and samples, fleshing
out any missing features, and squashing bugs.

Signed-off-by: Charles E. Youse <charles.youse@intel.com>
This commit is contained in:
Charles E. Youse 2019-07-04 20:17:14 -07:00 • committed by Andrew Boie
commit 4ddaa59a89
26 changed files with 733 additions and 117 deletions
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11
arch/x86/core/Kconfig.ia32
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@ -32,17 +32,6 @@ config IDT_NUM_VECTORS
Interrupt Descriptor Table (IDT). By default all 256 vectors are
supported in an IDT requiring 2048 bytes of memory.
config MAX_IRQ_LINES
int "Number of IRQ lines"
default 128
range 0 256
help
This option specifies the number of IRQ lines in the system.
It can be tuned to save some bytes in ROM, as it determines the
size of the _irq_to_interrupt_vector_table, which is used at runtime
to program to the PIC the association between vectors and
interrupts.
config SET_GDT
bool "Setup GDT as part of boot process"
default y