109 lines
3.1 KiB
ArmAsm
109 lines
3.1 KiB
ArmAsm
/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/leonstack.h>
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#include <asm-leon/asmmacro.h>
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#include <asm-leon/winmacros.h>
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#include <asm-leon/leon.h>
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/* l0: psr
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l1: pc
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l2: npc
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l3: wim
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l7: irqnr */
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.seg "text"
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/* ------- */
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.weak _leonbare_irq_entry_svt
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.set _leonbare_irq_entry_svt,__leonbare_irq_entry_svt
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.weak leonbare_irq_entry
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.set leonbare_irq_entry,_leonbare_irq_entry
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/* ------- */
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!.global leonbare_irq_entry,_leonbare_irq_entry_svt
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.global _irqtbl, _irqtrap, handler_irq, fpustate_current
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__leonbare_irq_entry_svt: /* irq from svt trap dispatcher */
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sub %l6,0x10, %l7
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rd %wim, %l3
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_leonbare_irq_entry:
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set SPARC_PSR_EF_MASK,%l6
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andn %l0, %l6, %l0 ! fpu off
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SAVE_ALL
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set nestcount,%o0
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ld [%o0],%o1
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add %o1,1,%o1
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st %o1,[%o0]
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#ifdef CONFIG_LEONBARE_NONESTEDIRQ
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or %l0, SPARC_PSR_PIL_MASK, %o0 ! no nested irqs
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wr %o0, SPARC_PSR_ET_MASK, %psr
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WRITE_PAUSE
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#else
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sll %l7,SPARC_PSR_PIL_SHIFT,%o1
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andn %l0,SPARC_PSR_PIL_MASK,%o0
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or %l0, %o1, %o1
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set nestedirq,%o0
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ld [%o0],%o0
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cmp %g0,%o0 ! no nested irqs?
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beq,a .L1
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or %o1, SPARC_PSR_PIL_MASK, %o1
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.L1:
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wr %o1, SPARC_PSR_ET_MASK, %psr
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WRITE_PAUSE
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#endif
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mov %l7, %o0 ! irq level
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call handler_irq ! void handler_irq (int irq, struct leonbare_pt_regs *pt_regs)
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#ifndef _SOFT_FLOAT
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add %sp, FW_REGS_SZ + 8 + SF_REGS_SZ , %o1 ! pt_regs ptr
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#else
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add %sp, SF_REGS_SZ , %o1 ! pt_regs ptr
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#endif
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or %l0, SPARC_PSR_PIL_MASK, %o1
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wr %o1, SPARC_PSR_ET_MASK, %psr ! enable nesting again, keep ET up
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WRITE_PAUSE
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set nestcount,%o0
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ld [%o0],%o1
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sub %o1,1,%o1
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st %o1,[%o0]
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RESTORE_ALL
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.seg "data"
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.global nestedirq
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.align 4
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nestedirq:
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.long 0
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.global nestcount
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.align 4
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nestcount:
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.long 0
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