Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-ixp4xx/include/mach/cpu.h
17633 views
1
/*

2
 * arch/arm/mach-ixp4xx/include/mach/cpu.h

3
 *

4
 * IXP4XX cpu type detection

5
 *

6
 * Copyright (C) 2007 MontaVista Software, Inc.

7
 *

8
 * This program is free software; you can redistribute it and/or modify

9
 * it under the terms of the GNU General Public License version 2 as

10
 * published by the Free Software Foundation.

11
 *

12
 */

13


14
#ifndef __ASM_ARCH_CPU_H__

15
#define __ASM_ARCH_CPU_H__

16


17
#include <asm/cputype.h>

18


19
/* Processor id value in CP15 Register 0 */

20
#define IXP42X_PROCESSOR_ID_VALUE	0x690541c0 /* including unused 0x690541Ex */

21
#define IXP42X_PROCESSOR_ID_MASK	0xffffffc0

22


23
#define IXP43X_PROCESSOR_ID_VALUE	0x69054040

24
#define IXP43X_PROCESSOR_ID_MASK	0xfffffff0

25


26
#define IXP46X_PROCESSOR_ID_VALUE	0x69054200 /* including IXP455 */

27
#define IXP46X_PROCESSOR_ID_MASK	0xfffffff0

28


29
#define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \

30
				IXP42X_PROCESSOR_ID_VALUE)

31
#define cpu_is_ixp42x()	((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \

32
			 IXP42X_PROCESSOR_ID_VALUE)

33
#define cpu_is_ixp43x()	((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \

34
			 IXP43X_PROCESSOR_ID_VALUE)

35
#define cpu_is_ixp46x()	((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \

36
			 IXP46X_PROCESSOR_ID_VALUE)

37


38
static inline u32 ixp4xx_read_feature_bits(void)

39
{

40
	u32 val = ~*IXP4XX_EXP_CFG2;

41


42
	if (cpu_is_ixp42x_rev_a0())

43
		return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP |

44
					       IXP4XX_FEATURE_AES);

45
	if (cpu_is_ixp42x())

46
		return val & IXP42X_FEATURE_MASK;

47
	if (cpu_is_ixp43x())

48
		return val & IXP43X_FEATURE_MASK;

49
	return val & IXP46X_FEATURE_MASK;

50
}

51


52
static inline void ixp4xx_write_feature_bits(u32 value)

53
{

54
	*IXP4XX_EXP_CFG2 = ~value;

55
}

56


57
#endif  /* _ASM_ARCH_CPU_H */

58


59