a09e64fbc0
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
78 lines
1.8 KiB
ArmAsm
78 lines
1.8 KiB
ArmAsm
/*
|
|
* arch/arm/mach-s3c2410/include/mach/entry-macro.S
|
|
*
|
|
* Low-level IRQ helper macros for S3C2410-based platforms
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
/* We have a problem that the INTOFFSET register does not always
|
|
* show one interrupt. Occasionally we get two interrupts through
|
|
* the prioritiser, and this causes the INTOFFSET register to show
|
|
* what looks like the logical-or of the two interrupt numbers.
|
|
*
|
|
* Thanks to Klaus, Shannon, et al for helping to debug this problem
|
|
*/
|
|
|
|
#define INTPND (0x10)
|
|
#define INTOFFSET (0x14)
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/irq.h>
|
|
|
|
.macro get_irqnr_preamble, base, tmp
|
|
.endm
|
|
|
|
.macro arch_ret_to_user, tmp1, tmp2
|
|
.endm
|
|
|
|
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
|
|
|
|
mov \base, #S3C24XX_VA_IRQ
|
|
|
|
@@ try the interrupt offset register, since it is there
|
|
|
|
ldr \irqstat, [ \base, #INTPND ]
|
|
teq \irqstat, #0
|
|
beq 1002f
|
|
ldr \irqnr, [ \base, #INTOFFSET ]
|
|
mov \tmp, #1
|
|
tst \irqstat, \tmp, lsl \irqnr
|
|
bne 1001f
|
|
|
|
@@ the number specified is not a valid irq, so try
|
|
@@ and work it out for ourselves
|
|
|
|
mov \irqnr, #0 @@ start here
|
|
|
|
@@ work out which irq (if any) we got
|
|
|
|
movs \tmp, \irqstat, lsl#16
|
|
addeq \irqnr, \irqnr, #16
|
|
moveq \irqstat, \irqstat, lsr#16
|
|
tst \irqstat, #0xff
|
|
addeq \irqnr, \irqnr, #8
|
|
moveq \irqstat, \irqstat, lsr#8
|
|
tst \irqstat, #0xf
|
|
addeq \irqnr, \irqnr, #4
|
|
moveq \irqstat, \irqstat, lsr#4
|
|
tst \irqstat, #0x3
|
|
addeq \irqnr, \irqnr, #2
|
|
moveq \irqstat, \irqstat, lsr#2
|
|
tst \irqstat, #0x1
|
|
addeq \irqnr, \irqnr, #1
|
|
|
|
@@ we have the value
|
|
1001:
|
|
adds \irqnr, \irqnr, #IRQ_EINT0
|
|
1002:
|
|
@@ exit here, Z flag unset if IRQ
|
|
|
|
.endm
|
|
|
|
/* currently don't need an disable_fiq macro */
|
|
|
|
.macro disable_fiq
|
|
.endm
|