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android_kernel_motorola_sm6225/include/asm-arm/arch-s3c2410/entry-macro.S

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
/*
* include/asm-arm/arch-s3c2410/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.
[ARM] 3443/1: [S3C2410] Improve IRQ entry code Patch from Ben Dooks Remove the old debug from the IRQ entry code, update the comments on the handling of the IRQ registers. The message "bad interrupt offset" is removed as it is only helpful for debugging, and can cause printk() flooding when under load. Make the code to deal with GPIO interrupts faster, and use the same path to deal with unexplained results from the IRQ registers. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-02 01:09:26 +02:00
*/
/* 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)
#define EXTINTPEND (0xa8)
#define EXTINTMASK (0xa4)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
[ARM] Cleanup ARM includes arch/arm/kernel/entry-armv.S has contained a comment suggesting that asm/hardware.h and asm/arch/irqs.h should be moved into the asm/arch/entry-macro.S include. So move the includes to these two files as required. Add missing includes (asm/hardware.h, asm/io.h) to asm/arch/system.h includes which use those facilities, and remove asm/io.h from kernel/process.c. Remove other unnecessary includes from arch/arm/kernel, arch/arm/mm and arch/arm/mach-footbridge. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-03 18:39:34 +01:00
#include <asm/hardware.h>
#include <asm/arch/irqs.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
[ARM] 3443/1: [S3C2410] Improve IRQ entry code Patch from Ben Dooks Remove the old debug from the IRQ entry code, update the comments on the handling of the IRQ registers. The message "bad interrupt offset" is removed as it is only helpful for debugging, and can cause printk() flooding when under load. Make the code to deal with GPIO interrupts faster, and use the same path to deal with unexplained results from the IRQ registers. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-02 01:09:26 +02:00
mov \base, #S3C24XX_VA_IRQ
ldr \irqstat, [ \base, #INTPND]
bics \irqnr, \irqstat, #3<<4 @@ only an GPIO IRQ
beq 2000f
@@ try the interrupt offset register, since it is there
ldr \irqnr, [ \base, #INTOFFSET ]
mov \tmp, #1
tst \irqstat, \tmp, lsl \irqnr
addne \irqnr, \irqnr, #IRQ_EINT0
bne 1001f
@@ the number specified is not a valid irq, so try
@@ and work it out for ourselves
mov \irqnr, #IRQ_EINT0 @@ start here
b 3000f
2000:
@@ load the GPIO interrupt register, and check it
add \tmp, \base, #S3C24XX_VA_GPIO - S3C24XX_VA_IRQ
ldr \irqstat, [ \tmp, # EXTINTPEND ]
ldr \irqnr, [ \tmp, # EXTINTMASK ]
bics \irqstat, \irqstat, \irqnr
beq 1001f
mov \irqnr, #(IRQ_EINT4 - 4)
@@ work out which irq (if any) we got
3000:
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
movs \irqnr, \irqnr
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
1001:
[ARM] 3443/1: [S3C2410] Improve IRQ entry code Patch from Ben Dooks Remove the old debug from the IRQ entry code, update the comments on the handling of the IRQ registers. The message "bad interrupt offset" is removed as it is only helpful for debugging, and can cause printk() flooding when under load. Make the code to deal with GPIO interrupts faster, and use the same path to deal with unexplained results from the IRQ registers. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-02 01:09:26 +02:00
@@ exit here, Z flag unset if IRQ
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
[ARM] 3443/1: [S3C2410] Improve IRQ entry code Patch from Ben Dooks Remove the old debug from the IRQ entry code, update the comments on the handling of the IRQ registers. The message "bad interrupt offset" is removed as it is only helpful for debugging, and can cause printk() flooding when under load. Make the code to deal with GPIO interrupts faster, and use the same path to deal with unexplained results from the IRQ registers. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-02 01:09:26 +02:00
.endm
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
/* currently don't need an disable_fiq macro */
.macro disable_fiq
.endm
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