Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-kirkwood/include/mach/entry-macro.S
10820 views
1
/*

2
 * arch/arm/mach-kirkwood/include/mach/entry-macro.S

3
 *

4
 * Low-level IRQ helper macros for Marvell Kirkwood platforms

5
 *

6
 * This file is licensed under the terms of the GNU General Public

7
 * License version 2.  This program is licensed "as is" without any

8
 * warranty of any kind, whether express or implied.

9
 */

10


11
#include <mach/bridge-regs.h>

12


13
	.macro  disable_fiq

14
	.endm

15


16
	.macro  arch_ret_to_user, tmp1, tmp2

17
	.endm

18


19
	.macro  get_irqnr_preamble, base, tmp

20
	ldr	\base, =IRQ_VIRT_BASE

21
	.endm

22


23
	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp

24
	@ check low interrupts

25
	ldr	\irqstat, [\base, #IRQ_CAUSE_LOW_OFF]

26
	ldr	\tmp, [\base, #IRQ_MASK_LOW_OFF]

27
	mov	\irqnr, #31

28
	ands	\irqstat, \irqstat, \tmp

29
	bne	1001f

30


31
	@ if no low interrupts set, check high interrupts

32
	ldr	\irqstat, [\base, #IRQ_CAUSE_HIGH_OFF]

33
	ldr	\tmp, [\base, #IRQ_MASK_HIGH_OFF]

34
	mov	\irqnr, #63

35
	ands	\irqstat, \irqstat, \tmp

36


37
	@ find first active interrupt source

38
1001:	clzne	\irqstat, \irqstat

39
	subne	\irqnr, \irqnr, \irqstat

40
	.endm

41


42