Import sources from 2011-03-30 iso image

1 files changed, 164 insertions, 0 deletions

diff --git a/sys/src/9/pc/mem.h b/sys/src/9/pc/mem.h
new file mode 100755
index 000000000..184e86c72
--- /dev/null
+++ b/sys/src/9/pc/mem.h
@@ -0,0 +1,164 @@
+/*
+ * Memory and machine-specific definitions.  Used in C and assembler.
+ */
+
+#define MIN(a, b)	((a) < (b)? (a): (b))
+#define MAX(a, b)	((a) > (b)? (a): (b))
+
+/*
+ * Sizes
+ */
+#define	BI2BY		8			/* bits per byte */
+#define	BI2WD		32			/* bits per word */
+#define	BY2WD		4			/* bytes per word */
+#define	BY2V		8			/* bytes per double word */
+#define	BY2PG		4096			/* bytes per page */
+#define	WD2PG		(BY2PG/BY2WD)		/* words per page */
+#define	BY2XPG		(4096*1024)		/* bytes per big page */
+#define	PGSHIFT		12			/* log(BY2PG) */
+#define	ROUND(s, sz)	(((s)+((sz)-1))&~((sz)-1))
+#define	PGROUND(s)	ROUND(s, BY2PG)
+#define	BLOCKALIGN	8
+
+/*
+ * In 32-bit mode, the MAXMACH limit is 32 without
+ * changing the way active.machs is defined and used
+ * (unfortunately, it is also used in the port code).
+ */
+#define	MAXMACH		32			/* max # cpus system can run */
+#define	KSTACK		4096			/* Size of kernel stack */
+
+/*
+ * Time
+ */
+#define	HZ		(100)			/* clock frequency */
+#define	MS2HZ		(1000/HZ)		/* millisec per clock tick */
+#define	TK2SEC(t)	((t)/HZ)		/* ticks to seconds */
+
+/*
+ *  Address spaces
+ */
+#define	KZERO		0xF0000000		/* base of kernel address space */
+#define	KTZERO		(KZERO+0x100000)	/* first address in kernel text - 9load sits below */
+#define	VPT		(KZERO-VPTSIZE)
+#define	VPTSIZE		BY2XPG
+#define	NVPT		(VPTSIZE/BY2WD)
+#define	KMAP		(VPT-KMAPSIZE)
+#define	KMAPSIZE	BY2XPG
+#define	VMAP		(KMAP-VMAPSIZE)
+#define	VMAPSIZE	(0x10000000-VPTSIZE-KMAPSIZE)
+#define	UZERO		0			/* base of user address space */
+#define	UTZERO		(UZERO+BY2PG)		/* first address in user text */
+#define	USTKTOP		(VMAP-BY2PG)		/* byte just beyond user stack */
+#define	USTKSIZE	(16*1024*1024)		/* size of user stack */
+#define	TSTKTOP		(USTKTOP-USTKSIZE)	/* end of new stack in sysexec */
+#define	TSTKSIZ 	100			/* pages in new stack; limits exec args */
+
+/*
+ * Fundamental addresses - bottom 64kB saved for return to real mode
+ */
+#define	CONFADDR	(KZERO+0x1200)		/* info passed from boot loader */
+#define	TMPADDR		(KZERO+0x2000)		/* used for temporary mappings */
+#define	APBOOTSTRAP	(KZERO+0x3000)		/* AP bootstrap code */
+#define	RMUADDR		(KZERO+0x7C00)		/* real mode Ureg */
+#define	RMCODE		(KZERO+0x8000)		/* copy of first page of KTEXT */
+#define	RMBUF		(KZERO+0x9000)		/* buffer for user space - known to vga */
+#define	IDTADDR		(KZERO+0x10800)		/* idt */
+#define	REBOOTADDR	(0x11000)		/* reboot code - physical address */
+#define	CPU0PDB		(KZERO+0x12000)		/* bootstrap processor PDB */
+#define	CPU0PTE		(KZERO+0x13000)		/* bootstrap processor PTE's for 0-4MB */
+#define	CPU0GDT		(KZERO+0x14000)		/* bootstrap processor GDT */
+#define	MACHADDR	(KZERO+0x15000)		/* as seen by current processor */
+#define	CPU0MACH	(KZERO+0x16000)		/* Mach for bootstrap processor */
+#define	MACHSIZE	BY2PG
+#define CPU0PTE1	(KZERO+0x17000)		/* bootstrap processor PTE's for 4MB-8MB */
+#define CPU0END		(CPU0PTE1+BY2PG)
+/*
+ * N.B.  ramscan knows that CPU0END is the end of reserved data
+ * N.B.  _startPADDR knows that CPU0PDB is the first reserved page
+ * and that there are 6 of them.
+ */
+
+/*
+ *  known x86 segments (in GDT) and their selectors
+ */
+#define	NULLSEG	0	/* null segment */
+#define	KDSEG	1	/* kernel data/stack */
+#define	KESEG	2	/* kernel executable */	
+#define	UDSEG	3	/* user data/stack */
+#define	UESEG	4	/* user executable */
+#define	TSSSEG	5	/* task segment */
+#define	APMCSEG		6	/* APM code segment */
+#define	APMCSEG16	7	/* APM 16-bit code segment */
+#define	APMDSEG		8	/* APM data segment */
+#define	KESEG16		9	/* kernel executable 16-bit */
+#define	NGDT		10	/* number of GDT entries required */
+/* #define	APM40SEG	8	/* APM segment 0x40 */
+
+#define	SELGDT	(0<<2)	/* selector is in gdt */
+#define	SELLDT	(1<<2)	/* selector is in ldt */
+
+#define	SELECTOR(i, t, p)	(((i)<<3) | (t) | (p))
+
+#define	NULLSEL	SELECTOR(NULLSEG, SELGDT, 0)
+#define	KDSEL	SELECTOR(KDSEG, SELGDT, 0)
+#define	KESEL	SELECTOR(KESEG, SELGDT, 0)
+#define	UESEL	SELECTOR(UESEG, SELGDT, 3)
+#define	UDSEL	SELECTOR(UDSEG, SELGDT, 3)
+#define	TSSSEL	SELECTOR(TSSSEG, SELGDT, 0)
+#define	APMCSEL 	SELECTOR(APMCSEG, SELGDT, 0)
+#define	APMCSEL16	SELECTOR(APMCSEG16, SELGDT, 0)
+#define	APMDSEL		SELECTOR(APMDSEG, SELGDT, 0)
+/* #define	APM40SEL	SELECTOR(APM40SEG, SELGDT, 0) */
+
+/*
+ *  fields in segment descriptors
+ */
+#define	SEGDATA	(0x10<<8)	/* data/stack segment */
+#define	SEGEXEC	(0x18<<8)	/* executable segment */
+#define	SEGTSS	(0x9<<8)	/* TSS segment */
+#define	SEGCG	(0x0C<<8)	/* call gate */
+#define	SEGIG	(0x0E<<8)	/* interrupt gate */
+#define	SEGTG	(0x0F<<8)	/* trap gate */
+#define	SEGTYPE	(0x1F<<8)
+
+#define	SEGP	(1<<15)		/* segment present */
+#define	SEGPL(x) ((x)<<13)	/* priority level */
+#define	SEGB	(1<<22)		/* granularity 1==4k (for expand-down) */
+#define	SEGG	(1<<23)		/* granularity 1==4k (for other) */
+#define	SEGE	(1<<10)		/* expand down */
+#define	SEGW	(1<<9)		/* writable (for data/stack) */
+#define	SEGR	(1<<9)		/* readable (for code) */
+#define	SEGD	(1<<22)		/* default 1==32bit (for code) */
+
+/*
+ *  virtual MMU
+ */
+#define	PTEMAPMEM	(1024*1024)	
+#define	PTEPERTAB	(PTEMAPMEM/BY2PG)
+#define	SEGMAPSIZE	1984
+#define	SSEGMAPSIZE	16
+#define	PPN(x)		((x)&~(BY2PG-1))
+
+/*
+ *  physical MMU
+ */
+#define	PTEVALID	(1<<0)
+#define	PTEWT		(1<<3)
+#define	PTEUNCACHED	(1<<4)
+#define	PTEWRITE	(1<<1)
+#define	PTERONLY	(0<<1)
+#define	PTEKERNEL	(0<<2)
+#define	PTEUSER		(1<<2)
+#define	PTESIZE		(1<<7)
+#define	PTEGLOBAL	(1<<8)
+
+/*
+ * Macros for calculating offsets within the page directory base
+ * and page tables. 
+ */
+#define	PDX(va)		((((ulong)(va))>>22) & 0x03FF)
+#define	PTX(va)		((((ulong)(va))>>12) & 0x03FF)
+
+#define	getpgcolor(a)	0
+