linux-libre/arch/arm/mach-mmp/cputype.h

#ifndef __ASM_MACH_CPUTYPE_H
#define __ASM_MACH_CPUTYPE_H

#include <asm/cputype.h>

/*
 *  CPU   Stepping   CPU_ID      CHIP_ID
 *
 * PXA168    S0    0x56158400   0x0000C910
 * PXA168    A0    0x56158400   0x00A0A168
 * PXA910    Y1    0x56158400   0x00F2C920
 * PXA910    A0    0x56158400   0x00F2C910
 * PXA910    A1    0x56158400   0x00A0C910
 * PXA920    Y0    0x56158400   0x00F2C920
 * PXA920    A0    0x56158400   0x00A0C920
 * PXA920    A1    0x56158400   0x00A1C920
 * MMP2	     Z0	   0x560f5811   0x00F00410
 * MMP2      Z1    0x560f5811   0x00E00410
 * MMP2      A0    0x560f5811   0x00A0A610
 */

extern unsigned int mmp_chip_id;

#ifdef CONFIG_CPU_PXA168
static inline int cpu_is_pxa168(void)
{
	return (((read_cpuid_id() >> 8) & 0xff) == 0x84) &&
		((mmp_chip_id & 0xfff) == 0x168);
}
#else
#define cpu_is_pxa168()	(0)
#endif

/* cpu_is_pxa910() is shared on both pxa910 and pxa920 */
#ifdef CONFIG_CPU_PXA910
static inline int cpu_is_pxa910(void)
{
	return (((read_cpuid_id() >> 8) & 0xff) == 0x84) &&
		(((mmp_chip_id & 0xfff) == 0x910) ||
		 ((mmp_chip_id & 0xfff) == 0x920));
}
#else
#define cpu_is_pxa910()	(0)
#endif

#ifdef CONFIG_CPU_MMP2
static inline int cpu_is_mmp2(void)
{
	return (((read_cpuid_id() >> 8) & 0xff) == 0x58);
}
#else
#define cpu_is_mmp2()	(0)
#endif

#endif /* __ASM_MACH_CPUTYPE_H */