08a1a9033a
boot/bios/ now holds the MBR, the El Torito stub and the real-mode stage 2; boot/uefi/ is empty and documented. Separate directories rather than #ifdefs, because the two share almost nothing. A BIOS loader lives in 16-bit real mode, reaches the firmware through software interrupts, and walks itself up into long mode. A UEFI loader is a 64-bit PE that the firmware has already placed in long mode with paging on, calling services through a table of function pointers. What they do share is the hand-off contract, which boot/README.md now writes down: ELF segments placed, long mode, a 24-byte-entry memory map at E820_MAP_ADDR, framebuffer geometry at VBE_INFO_ADDR. That contract is the point of documenting it now. UEFI's GetMemoryMap returns EFI_MEMORY_DESCRIPTORs, and the right move is to translate them into the entries kernel/arch/x86_64/e820.c already parses rather than teach the kernel a second format. Build output paths under $(BUILD)/boot are unchanged; only sources moved.
57 lines
3.1 KiB
C
57 lines
3.1 KiB
C
#pragma once
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// SchOS visual identity — one palette, shared by everything that draws.
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//
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// This header exists because there were three unrelated designs and the seams
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// showed. The bootloader splash was deep purple with gold text, deliberately
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// matching the *panic* screen; the kernel console was cream with near-black
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// text; the panic screen was the purple both were copying. So a normal boot
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// looked like a crash, then abruptly became an amber terminal, and none of the
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// three looked like the same product.
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//
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// The rule now: **normal states are calm and dark; only failure is loud.**
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// Boot, console and shell share SCH_BG/SCH_FG. The panic screen keeps the
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// full-bleed purple entirely to itself, which is what makes it mean something.
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//
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// Included by boot/bios/stage2main.c (freestanding, pre-kernel), kernel/dev/vga.c,
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// kernel/core/console.c and kernel/core/panic.c. Plain #defines only — no
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// types, no code — because stage2 is compiled 32-bit against a different
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// world than the kernel.
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//
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// Colours are 0xRRGGBB. vga_draw_pixel packs them for whatever depth the
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// framebuffer actually is.
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// --- the product ---------------------------------------------------------
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// Near-black with a slight blue cast rather than pure #000: pure black on an
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// LCD reads as "the machine is off", and every serious platform sits a few
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// points above it.
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#define SCH_BG 0x0C0E13
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#define SCH_FG 0xE6E8EC // primary text
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#define SCH_DIM 0x707784 // secondary text, hints, version strings
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#define SCH_ACCENT 0x7C5CFF // the one accent: violet, keeping the
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// project's purple lineage without the
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// eye-searing chroma of the old splash
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#define SCH_ACCENT_DIM 0x2A2440 // unused track behind a progress bar
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#define SCH_OK 0x4ADE80 // reserved: success states
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#define SCH_WARN 0xFBBF24 // reserved: warnings that are not panics
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// --- failure -------------------------------------------------------------
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// PSOGM. Deliberately unlike anything above, because its whole job is to be
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// unmistakable. See kernel/core/panic.c.
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//
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// These are the values panic.c actually renders. It used to carry a second,
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// different set of PSOGM_* defines of its own, so the two disagreed about what
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// the crash screen looked like and this header was quietly fiction. There was
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// also a PSOGM_TITLE in gold here, left over from a splash design that no
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// longer exists -- the screen is one background and two weights of text, on
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// purpose, because a crash screen with an accent colour is a crash screen
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// someone was enjoying designing.
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#define PSOGM_BG 0x4B1D9A // the purple
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#define PSOGM_FG 0xFFFFFF // the face, the headline, the values
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#define PSOGM_DIM 0xC3AEEC // labels and the closing lines
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// The one exception to "two weights of text": the QR card has to be a light
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// panel with dark modules, because that is what a scanner needs. It reads as a
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// label stuck onto the screen, which is roughly what it is.
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#define PSOGM_CARD 0xFFFFFF
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#define PSOGM_INK 0x000000
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