2 * Memory and machine-specific definitions. Used in C and assembler.
4 #define KiB 1024u /* Kibi 0x0000000000000400 */
5 #define MiB 1048576u /* Mebi 0x0000000000100000 */
6 #define GiB 1073741824u /* Gibi 000000000040000000 */
8 #define HOWMANY(x, y) (((x)+((y)-1))/(y))
9 #define ROUNDUP(x, y) (HOWMANY((x), (y))*(y)) /* ceiling */
10 #define ROUNDDN(x, y) (((x)/(y))*(y)) /* floor */
11 #define MIN(a, b) ((a) < (b)? (a): (b))
12 #define MAX(a, b) ((a) > (b)? (a): (b))
15 * Not sure where these macros should go.
16 * This probably isn't right but will do for now.
17 * The macro names are problematic too.
20 * In B(o), 'o' is the bit offset in the register.
21 * For multi-bit fields use F(v, o, w) where 'v' is the value
22 * of the bit-field of width 'w' with LSb at bit offset 'o'.
25 #define F(v, o, w) (((v) & ((1<<(w))-1))<<(o))
27 #define FCLR(d, o, w) ((d) & ~(((1<<(w))-1)<<(o)))
28 #define FEXT(d, o, w) (((d)>>(o)) & ((1<<(w))-1))
29 #define FINS(d, o, w, v) (FCLR((d), (o), (w))|F((v), (o), (w)))
30 #define FSET(d, o, w) ((d)|(((1<<(w))-1)<<(o)))
32 #define FMASK(o, w) (((1<<(w))-1)<<(o))
37 #define BY2PG (4*KiB) /* bytes per page */
38 #define PGSHIFT 12 /* log(BY2PG) */
39 #define PGROUND(s) ROUNDUP(s, BY2PG)
40 #define ROUND(s, sz) (((s)+(sz-1))&~(sz-1))
42 #define MAXMACH 1 /* max # cpus system can run */
43 #define MACHSIZE BY2PG
45 #define KSTKSIZE (8*KiB)
46 #define STACKALIGN(sp) ((sp) & ~3) /* bug: assure with alloc */
50 * KTZERO is used by kprof and dumpstack (if any).
52 * KZERO is mapped to physical 0.
53 * u-boot claims to take 0 - 8MB.
55 * vectors are at 0, plan9.ini is at KZERO+4K and is limited to 16K by
56 * devenv. L2 PTEs for trap vectors & i/o regs are stored from KZERO+56K
57 * to L1-MACHSIZE (KZERO+60K). cpu0's Mach struct is at L1 - MACHSIZE(4K)
58 * to L1 (KZERO+60K to KZERO+64K). L1 PTEs are stored from L1 to L1+32K
59 * (KZERO+64K to KZERO+96K). KTZERO may be anywhere after KZERO+96K.
62 #define KSEG0 0x60000000 /* kernel segment */
63 /* mask to check segment; good for 512MB dram */
64 #define KSEGM 0xE0000000
65 #define KZERO KSEG0 /* kernel address space */
66 #define CONFADDR (KZERO+4*KiB) /* unparsed plan9.ini */
67 #define L1 (KZERO+64*KiB) /* tt ptes: 16KiB aligned */
68 #define KTZERO (KZERO+0x800000) /* kernel text start */
70 #define UZERO 0 /* user segment */
71 #define UTZERO (UZERO+BY2PG) /* user text start */
72 #define USTKTOP KZERO /* user segment end +1 */
73 #define USTKSIZE (8*1024*1024) /* user stack size */
74 #define TSTKTOP (USTKTOP-USTKSIZE) /* sysexec temporary stack */
77 /* address at which to copy and execute rebootcode */
78 #define REBOOTADDR KADDR(0x100)
82 * Does this need to be here? Used in assembler?
84 #define HZ 100 /* clock frequency */
85 #define MS2HZ (1000/HZ) /* millisec per clock tick */
86 #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
91 #define CLOCKFREQ (200*1000*1000) /* TCLK on sheeva: 200MHz */
92 //#define MS2TMR(t) ((ulong)(((uvlong)(t)*CLOCKFREQ)/1000))
93 //#define US2TMR(t) ((ulong)(((uvlong)(t)*CLOCKFREQ)/1000000))
98 #define BLOCKALIGN 32 /* only used in allocb.c */
99 #define KSTACK KSTKSIZE
104 #define BI2BY 8 /* bits per byte */
107 #define BY2V 8 /* only used in xalloc.c */
109 #define CACHELINESZ 32
110 #define PTEMAPMEM (1024*1024)
111 #define PTEPERTAB (PTEMAPMEM/BY2PG)
112 #define SEGMAPSIZE 1984
113 #define SSEGMAPSIZE 16
114 #define PPN(x) ((x)&~(BY2PG-1))
117 * With a little work these move to port.
119 #define PTEVALID (1<<0)
121 #define PTEWRITE (1<<1)
122 #define PTEUNCACHED (1<<2)
123 #define PTEKERNEL (1<<3)
126 * Physical machine information from here on.
130 /* from 0x80000000 up is uncached by L2 (see archkw.c) */
131 #define PHYSCESASRAM 0xc8010000
132 // #define PHYSSPIFLASH 0xe8000000 /* ignore spi flash */
133 /* this address is configured by u-boot, and is 0xd0000000 at reset */
134 #define PHYSIO 0xf1000000 /* internal registers */
135 #define PHYSCONS (PHYSIO + 0x12000) /* uart */
136 #define PHYSNAND1 0xf9000000 /* sheeva/openrd (remapped) */
137 #define PHYSNAND2 0xd8000000 /* guru */
138 #define PHYSBOOTROM 0xffff0000 /* boot rom */
140 #define FLASHSIZE (512*MiB) /* but not addressed linearly */
142 #define VIRTIO PHYSIO