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66 lines
1.4 KiB
ArmAsm
66 lines
1.4 KiB
ArmAsm
/*
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mini - a Free Software replacement for the Nintendo/BroadOn IOS.
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IRQ support
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Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 2.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "hollywood.h"
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#include "irq.h"
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.globl v_irq
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.globl irq_setup_stack
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.globl irq_kill
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.globl irq_restore
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.extern __irqstack_addr
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.extern irq_handler
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irq_setup_stack:
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@ Switch to IRQ mode
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mrs r0, cpsr
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msr cpsr_c, #0xd2
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@ Setup interrupt stack
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ldr sp, =__irqstack_addr
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@ Restore mode
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msr cpsr_c, r0
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bx lr
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v_irq:
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push {r0-r3, r9, r12, lr}
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blx irq_handler
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pop {r0-r3, r9, r12, lr}
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subs pc, lr, #4
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irq_kill:
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mrs r1, cpsr
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and r0, r1, #(CPSR_IRQDIS|CPSR_FIQDIS)
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orr r1, r1, #(CPSR_IRQDIS|CPSR_FIQDIS)
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msr cpsr_c, r1
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bx lr
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irq_restore:
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mrs r1, cpsr
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bic r1, r1, #(CPSR_IRQDIS|CPSR_FIQDIS)
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orr r1, r1, r0
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msr cpsr_c, r1
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bx lr
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