f80dff9da0
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>
67 lines
1.8 KiB
ArmAsm
67 lines
1.8 KiB
ArmAsm
/*
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* include/asm-arm/arch-h720x/entry-macro.S
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*
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* Low-level IRQ helper macros for Hynix HMS720x based platforms
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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.macro disable_fiq
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.endm
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.macro get_irqnr_preamble, base, tmp
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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#if defined (CONFIG_CPU_H7201) || defined (CONFIG_CPU_H7202)
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@ we could use the id register on H7202, but this is not
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@ properly updated when we come back from asm_do_irq
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@ without a previous return from interrupt
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@ (see loops below in irq_svc, irq_usr)
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@ We see unmasked pending ints only, as the masked pending ints
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@ are not visible here
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mov \base, #0xf0000000 @ base register
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orr \base, \base, #0x24000 @ irqbase
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ldr \irqstat, [\base, #0x04] @ get interrupt status
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#if defined (CONFIG_CPU_H7201)
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ldr \tmp, =0x001fffff
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#else
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mvn \tmp, #0xc0000000
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#endif
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and \irqstat, \irqstat, \tmp @ mask out unused ints
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mov \irqnr, #0
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mov \tmp, #0xff00
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orr \tmp, \tmp, #0xff
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tst \irqstat, \tmp
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addeq \irqnr, \irqnr, #16
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moveq \irqstat, \irqstat, lsr #16
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tst \irqstat, #255
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addeq \irqnr, \irqnr, #8
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moveq \irqstat, \irqstat, lsr #8
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tst \irqstat, #15
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addeq \irqnr, \irqnr, #4
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moveq \irqstat, \irqstat, lsr #4
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tst \irqstat, #3
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addeq \irqnr, \irqnr, #2
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moveq \irqstat, \irqstat, lsr #2
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tst \irqstat, #1
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addeq \irqnr, \irqnr, #1
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moveq \irqstat, \irqstat, lsr #1
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tst \irqstat, #1 @ bit 0 should be set
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.endm
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.macro irq_prio_table
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.endm
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#else
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#error hynix processor selection missmatch
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#endif
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