include/linux/soc/mmp/cputype.h

Source file repositories/reference/linux-study-clean/include/linux/soc/mmp/cputype.h

File Facts

System
Linux kernel
Corpus path
include/linux/soc/mmp/cputype.h
Extension
.h
Size
1594 bytes
Lines
66
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __ASM_MACH_CPUTYPE_H
#define __ASM_MACH_CPUTYPE_H

#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
#include <asm/cputype.h>
#endif

/*
 *  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
 * MMP3      A0    0x562f5842   0x00A02128
 * MMP3      B0    0x562f5842   0x00B02128
 */

extern unsigned int mmp_chip_id;

#if defined(CONFIG_MACH_MMP2_DT)
static inline int cpu_is_mmp2(void)
{
	return (((read_cpuid_id() >> 8) & 0xff) == 0x58) &&
		(((mmp_chip_id & 0xfff) == 0x410) ||
		 ((mmp_chip_id & 0xfff) == 0x610));
}
#else
#define cpu_is_mmp2()	(0)
#endif

#ifdef CONFIG_MACH_MMP3_DT
static inline int cpu_is_mmp3(void)
{
	return (((read_cpuid_id() >> 8) & 0xff) == 0x58) &&
		((mmp_chip_id & 0xffff) == 0x2128);
}

static inline int cpu_is_mmp3_a0(void)
{
	return (cpu_is_mmp3() &&
		((mmp_chip_id & 0x00ff0000) == 0x00a00000));
}

static inline int cpu_is_mmp3_b0(void)
{
	return (cpu_is_mmp3() &&
		((mmp_chip_id & 0x00ff0000) == 0x00b00000));
}

#else
#define cpu_is_mmp3()		(0)
#define cpu_is_mmp3_a0()	(0)
#define cpu_is_mmp3_b0()	(0)
#endif

#endif /* __ASM_MACH_CPUTYPE_H */

Annotation

Implementation Notes