1 /* arch/arm/mach-s3c2410/include/mach/uncompress.h
2  *
3  * Copyright (c) 2003-2007 Simtec Electronics
4  *	http://armlinux.simtec.co.uk/
5  *	Ben Dooks <ben@simtec.co.uk>
6  *
7  * S3C2410 - uncompress code
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12 */
13 
14 #ifndef __ASM_ARCH_UNCOMPRESS_H
15 #define __ASM_ARCH_UNCOMPRESS_H
16 
17 #include <mach/regs-gpio.h>
18 #include <mach/map.h>
19 
20 /* working in physical space... */
21 #undef S3C2410_GPIOREG
22 #define S3C2410_GPIOREG(x) ((S3C24XX_PA_GPIO + (x)))
23 
24 #include <plat/uncompress.h>
25 
is_arm926(void)26 static inline int is_arm926(void)
27 {
28 	unsigned int cpuid;
29 
30 	asm volatile ("mrc p15, 0, %0, c1, c0, 0" : "=r" (cpuid));
31 
32 	return ((cpuid & 0xff0) == 0x260);
33 }
34 
arch_detect_cpu(void)35 static void arch_detect_cpu(void)
36 {
37 	unsigned int cpuid;
38 
39 	cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
40 	cpuid &= S3C2410_GSTATUS1_IDMASK;
41 
42 	if (is_arm926() || cpuid == S3C2410_GSTATUS1_2440 ||
43 	    cpuid == S3C2410_GSTATUS1_2442 ||
44 	    cpuid == S3C2410_GSTATUS1_2416 ||
45 	    cpuid == S3C2410_GSTATUS1_2450) {
46 		fifo_mask = S3C2440_UFSTAT_TXMASK;
47 		fifo_max = 63 << S3C2440_UFSTAT_TXSHIFT;
48 	} else {
49 		fifo_mask = S3C2410_UFSTAT_TXMASK;
50 		fifo_max = 15 << S3C2410_UFSTAT_TXSHIFT;
51 	}
52 }
53 
54 #endif /* __ASM_ARCH_UNCOMPRESS_H */
55