From 78ee7d5717807e6ac779293d0d3c78341de6130a Mon Sep 17 00:00:00 2001
From: "Konstantin Kirik (snegovick)" <snegovick@uprojects.org>
Date: Sun, 28 Dec 2025 12:27:31 +0300
Subject: Move existing boards into subdits split per arch

---
 os/pc/apbootstrap.s | 110 ----------------------------------------------------
 1 file changed, 110 deletions(-)
 delete mode 100644 os/pc/apbootstrap.s

(limited to 'os/pc/apbootstrap.s')

diff --git a/os/pc/apbootstrap.s b/os/pc/apbootstrap.s
deleted file mode 100644
index 3887d71d..00000000
--- a/os/pc/apbootstrap.s
+++ /dev/null
@@ -1,110 +0,0 @@
-#include "mem.h"
-
-#define NOP		BYTE $0x90		/* NOP */
-#define LGDT(gdtptr)	BYTE $0x0F;		/* LGDT */			\
-			BYTE $0x01; BYTE $0x16;					\
-			WORD $gdtptr
-#define FARJUMP16(s, o)	BYTE $0xEA;		/* far jump to ptr16:16 */	\
-			WORD $o; WORD $s;					\
-			NOP; NOP; NOP
-#define FARJUMP32(s, o)	BYTE $0x66;		/* far jump to ptr32:16 */	\
-			BYTE $0xEA; LONG $o; WORD $s
-
-#define	DELAY		BYTE $0xEB;		/* JMP .+2 */			\
-			BYTE $0x00
-#define INVD		BYTE $0x0F; BYTE $0x08
-#define WBINVD		BYTE $0x0F; BYTE $0x09
-
-/*
- * Macros for calculating offsets within the page directory base
- * and page tables. Note that these are assembler-specific hence
- * the '<<2'.
- */
-#define PDO(a)		(((((a))>>22) & 0x03FF)<<2)
-#define PTO(a)		(((((a))>>12) & 0x03FF)<<2)
-
-/*
- * Start an Application Processor. This must be placed on a 4KB boundary
- * somewhere in the 1st MB of conventional memory (APBOOTSTRAP). However,
- * due to some shortcuts below it's restricted further to within the 1st
- * 64KB. The AP starts in real-mode, with
- *   CS selector set to the startup memory address/16;
- *   CS base set to startup memory address;
- *   CS limit set to 64KB;
- *   CPL and IP set to 0.
- */
-TEXT apbootstrap(SB), $0
-	FARJUMP16(0, _apbootstrap(SB))
-TEXT _apvector(SB), $0				/* address APBOOTSTRAP+0x08 */
-	LONG $0
-TEXT _appdb(SB), $0				/* address APBOOTSTRAP+0x0C */
-	LONG $0
-TEXT _apapic(SB), $0				/* address APBOOTSTRAP+0x10 */
-	LONG $0
-TEXT _apbootstrap(SB), $0			/* address APBOOTSTRAP+0x14 */
-	MOVW	CS, AX
-	MOVW	AX, DS				/* initialise DS */
-
-	LGDT(gdtptr(SB))			/* load a basic gdt */
-
-	MOVL	CR0, AX
-	ORL	$1, AX
-	MOVL	AX, CR0				/* turn on protected mode */
-	DELAY					/* JMP .+2 */
-
-	BYTE $0xB8; WORD $SELECTOR(1, SELGDT, 0)/* MOVW $SELECTOR(1, SELGDT, 0), AX */
-	MOVW	AX, DS
-	MOVW	AX, ES
-	MOVW	AX, FS
-	MOVW	AX, GS
-	MOVW	AX, SS
-
-	FARJUMP32(SELECTOR(2, SELGDT, 0), _ap32-KZERO(SB))
-
-/*
- * For Pentiums and higher, the code that enables paging must come from
- * pages that are identity mapped. 
- * To this end double map KZERO at virtual 0 and undo the mapping once virtual
- * nirvana has been obtained.
- */
-TEXT _ap32(SB), $0
-	MOVL	_appdb-KZERO(SB), CX		/* physical address of PDB */
-	MOVL	(PDO(KZERO))(CX), DX		/* double-map KZERO at 0 */
-	MOVL	DX, (PDO(0))(CX)
-	MOVL	CX, CR3				/* load and flush the mmu */
-
-	MOVL	CR0, DX
-	ORL	$0x80010000, DX			/* PG|WP */
-	ANDL	$~0x6000000A, DX		/* ~(CD|NW|TS|MP) */
-
-	MOVL	$_appg(SB), AX
-	MOVL	DX, CR0				/* turn on paging */
-	JMP*	AX
-
-TEXT _appg(SB), $0
-	MOVL	CX, AX				/* physical address of PDB */
-	ORL	$KZERO, AX
-	MOVL	$0, (PDO(0))(AX)		/* undo double-map of KZERO at 0 */
-	MOVL	CX, CR3				/* load and flush the mmu */
-
-	MOVL	$(MACHADDR+MACHSIZE-4), SP
-
-	MOVL	$0, AX
-	PUSHL	AX
-	POPFL
-
-	MOVL	_apapic(SB), AX
-	MOVL	AX, (SP)
-	MOVL	_apvector(SB), AX
-	CALL*	AX
-_aphalt:
-	HLT
-	JMP	_aphalt
-
-TEXT gdt(SB), $0
-	LONG $0x0000; LONG $0
-	LONG $0xFFFF; LONG $(SEGG|SEGB|(0xF<<16)|SEGP|SEGPL(0)|SEGDATA|SEGW)
-	LONG $0xFFFF; LONG $(SEGG|SEGD|(0xF<<16)|SEGP|SEGPL(0)|SEGEXEC|SEGR)
-TEXT gdtptr(SB), $0
-	WORD	$(3*8-1)
-	LONG	$gdt-KZERO(SB)
-- 
cgit v1.2.3