Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm/mach-pxa/pxa-regs.h
29266 views
1
/* SPDX-License-Identifier: GPL-2.0 */

2
/*

3
 *  Author:	Nicolas Pitre

4
 *  Created:	Jun 15, 2001

5
 *  Copyright:	MontaVista Software Inc.

6
 */

7
#ifndef __ASM_MACH_PXA_REGS_H

8
#define __ASM_MACH_PXA_REGS_H

9


10
/*

11
 * Workarounds for at least 2 errata so far require this.

12
 * The mapping is set in mach-pxa/generic.c.

13
 */

14
#define UNCACHED_PHYS_0		0xfe000000

15
#define UNCACHED_PHYS_0_SIZE	0x00100000

16


17
/*

18
 * Intel PXA2xx internal register mapping:

19
 *

20
 * 0x40000000 - 0x41ffffff <--> 0xf2000000 - 0xf3ffffff

21
 * 0x44000000 - 0x45ffffff <--> 0xf4000000 - 0xf5ffffff

22
 * 0x48000000 - 0x49ffffff <--> 0xf6000000 - 0xf7ffffff

23
 * 0x4c000000 - 0x4dffffff <--> 0xf8000000 - 0xf9ffffff

24
 * 0x50000000 - 0x51ffffff <--> 0xfa000000 - 0xfbffffff

25
 * 0x54000000 - 0x55ffffff <--> 0xfc000000 - 0xfdffffff

26
 * 0x58000000 - 0x59ffffff <--> 0xfe000000 - 0xffffffff

27
 *

28
 * Note that not all PXA2xx chips implement all those addresses, and the

29
 * kernel only maps the minimum needed range of this mapping.

30
 */

31
#define io_v2p(x) (0x3c000000 + ((x) & 0x01ffffff) + (((x) & 0x0e000000) << 1))

32
#define io_p2v(x) IOMEM(0xf2000000 + ((x) & 0x01ffffff) + (((x) & 0x1c000000) >> 1))

33


34
#ifndef __ASSEMBLY__

35
# define __REG(x)	(*((volatile u32 __iomem *)io_p2v(x)))

36


37
/* With indexed regs we don't want to feed the index through io_p2v()

38
   especially if it is a variable, otherwise horrible code will result. */

39
# define __REG2(x,y)	\

40
	(*(volatile u32 __iomem*)((u32)&__REG(x) + (y)))

41


42
# define __PREG(x)	(io_v2p((u32)&(x)))

43


44
#else

45


46
# define __REG(x)	io_p2v(x)

47
# define __PREG(x)	io_v2p(x)

48


49
#endif

50


51


52
#endif

53


54