OpenSDV
/
linux-stable-rt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux-stable-rt/include/asm-arm/arch-h720x/entry-macro.S

67 lines
1.8 KiB
ArmAsm
Raw Normal View History

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-h720x/entry-macro.S
*
* Low-level IRQ helper macros for Hynix HMS720x 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.
*/
.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
.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, irqstat, base, tmp
#if defined (CONFIG_CPU_H7201) || defined (CONFIG_CPU_H7202)
@ we could use the id register on H7202, but this is not
@ properly updated when we come back from asm_do_irq
@ without a previous return from interrupt
@ (see loops below in irq_svc, irq_usr)
@ We see unmasked pending ints only, as the masked pending ints
@ are not visible here
mov \base, #0xf0000000 @ base register
orr \base, \base, #0x24000 @ irqbase
ldr \irqstat, [\base, #0x04] @ get interrupt status
#if defined (CONFIG_CPU_H7201)
ldr \tmp, =0x001fffff
#else
mvn \tmp, #0xc0000000
#endif
and \irqstat, \irqstat, \tmp @ mask out unused ints
mov \irqnr, #0
mov \tmp, #0xff00
orr \tmp, \tmp, #0xff
tst \irqstat, \tmp
addeq \irqnr, \irqnr, #16
moveq \irqstat, \irqstat, lsr #16
tst \irqstat, #255
addeq \irqnr, \irqnr, #8
moveq \irqstat, \irqstat, lsr #8
tst \irqstat, #15
addeq \irqnr, \irqnr, #4
moveq \irqstat, \irqstat, lsr #4
tst \irqstat, #3
addeq \irqnr, \irqnr, #2
moveq \irqstat, \irqstat, lsr #2
tst \irqstat, #1
addeq \irqnr, \irqnr, #1
moveq \irqstat, \irqstat, lsr #1
tst \irqstat, #1 @ bit 0 should be set
.endm
.macro irq_prio_table
.endm
#else
#error hynix processor selection missmatch
#endif