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[metal] Add a uprintf() routine, for non-emergency boot logging (#905)

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* [metal] Add a uprintf() routine, for non-emergency boot logging
* [metal] _Really_ push forward timing of VGA TTY initialization
* [metal] Do something useful with uprintf()
* [metal] Locate some ACPI tables, for later hardware detection

Specifically the code now tries to find the ACPI RSDP,
RSDT/XSDT, FADT, & MADT tables, whether in legacy BIOS
bootup mode or in a UEFI bootup.  These are useful for
figuring out how to (re)enable asynchronous interrupts
in legacy 8259 PIC mode.
This commit is contained in:
tkchia 2023-10-26 05:32:20 +08:00 • committed by GitHub
parent 062b2d776e
commit ed17d3008b
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25 changed files with 999 additions and 36 deletions
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12
libc/nt/efi.h
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@ -103,6 +103,18 @@
0x96, 0xFB, 0x7A, 0xDE, 0xD0, 0x80, 0x51, 0x6A \
} \
}
#define ACPI_20_TABLE_GUID \
{ \
0x8868E871, 0xE4F1, 0x11D3, { \
0xBC, 0x22, 0x00, 0x80, 0xC7, 0x3C, 0x88, 0x81 \
} \
}
#define ACPI_10_TABLE_GUID \
{ \
0xEB9D2D30, 0x2D88, 0x11D3, { \
0x9A, 0x16, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D \
} \
}
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_