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linux-stable-rt/include/asm-arm/arch-ebsa110/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 06:20:36 +08:00
/*
* include/asm-arm/arch-ebsa110/entry-macro.S
*
* Low-level IRQ helper macros for ebsa110 platform.
*
* 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.
*/
#define IRQ_STAT 0xff000000 /* read */
.macro disable_fiq
.endm
[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user get_irqnr_preamble allows machines to take some action before entering the get_irqnr_and_base loop. On iop we enable cp6 access. arch_ret_to_user is added to the userspace return path to allow individual architectures to take actions, like disabling coprocessor access, before the final return to userspace. Per Nicolas Pitre's note, there is no need to cp_wait on the return to user as the latency to return is sufficient. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-17 05:16:32 +08:00
.macro get_irqnr_preamble, base, tmp
[ARM] Use new get_irqnr_preamble Use the new get_irqnr_preamble macro to move the address of the IRQ controller outside the IRQ handling loop. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-12 22:25:50 +08:00
mov \base, #IRQ_STAT
[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user get_irqnr_preamble allows machines to take some action before entering the get_irqnr_and_base loop. On iop we enable cp6 access. arch_ret_to_user is added to the userspace return path to allow individual architectures to take actions, like disabling coprocessor access, before the final return to userspace. Per Nicolas Pitre's note, there is no need to cp_wait on the return to user as the latency to return is sufficient. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-17 05:16:32 +08:00
.endm
.macro arch_ret_to_user, tmp1, tmp2
.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 06:20:36 +08:00
.macro get_irqnr_and_base, irqnr, stat, base, tmp
ldrb \stat, [\base] @ get interrupts
mov \irqnr, #0
tst \stat, #15
addeq \irqnr, \irqnr, #4
moveq \stat, \stat, lsr #4
tst \stat, #3
addeq \irqnr, \irqnr, #2
moveq \stat, \stat, lsr #2
tst \stat, #1
addeq \irqnr, \irqnr, #1
moveq \stat, \stat, lsr #1
tst \stat, #1 @ bit 0 should be set
.endm