2010-10-27 18:28:55 +02:00
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/* SMP IPI low-level handler
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*
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* Copyright (C) 2006-2007 Matsushita Electric Industrial Co., Ltd.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <linux/sys.h>
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#include <linux/linkage.h>
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#include <asm/smp.h>
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#include <asm/thread_info.h>
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#include <asm/cpu-regs.h>
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2012-03-28 19:30:02 +02:00
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#include <asm/intctl-regs.h>
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2010-10-27 18:28:55 +02:00
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#include <proc/smp-regs.h>
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#include <asm/asm-offsets.h>
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#include <asm/frame.inc>
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.am33_2
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###############################################################################
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#
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# IPI interrupt handler
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#
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###############################################################################
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.globl mn10300_low_ipi_handler
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mn10300_low_ipi_handler:
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add -4,sp
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mov d0,(sp)
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movhu (IAGR),d0
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and IAGR_GN,d0
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lsr 0x2,d0
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#ifdef CONFIG_MN10300_CACHE_ENABLED
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cmp FLUSH_CACHE_IPI,d0
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beq mn10300_flush_cache_ipi
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#endif
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cmp SMP_BOOT_IRQ,d0
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beq mn10300_smp_boot_ipi
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/* OTHERS */
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mov (sp),d0
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add 4,sp
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#ifdef CONFIG_GDBSTUB
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jmp gdbstub_io_rx_handler
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#else
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jmp end
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#endif
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###############################################################################
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#
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# Cache flush IPI interrupt handler
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#
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###############################################################################
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#ifdef CONFIG_MN10300_CACHE_ENABLED
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mn10300_flush_cache_ipi:
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mov (sp),d0
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add 4,sp
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/* FLUSH_CACHE_IPI */
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add -4,sp
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SAVE_ALL
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mov GxICR_DETECT,d2
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movbu d2,(GxICR(FLUSH_CACHE_IPI)) # ACK the interrupt
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movhu (GxICR(FLUSH_CACHE_IPI)),d2
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call smp_cache_interrupt[],0
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RESTORE_ALL
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jmp end
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#endif
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###############################################################################
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#
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# SMP boot CPU IPI interrupt handler
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#
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###############################################################################
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mn10300_smp_boot_ipi:
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/* clear interrupt */
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movhu (GxICR(SMP_BOOT_IRQ)),d0
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and ~GxICR_REQUEST,d0
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movhu d0,(GxICR(SMP_BOOT_IRQ))
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mov (sp),d0
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add 4,sp
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# get stack
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mov (CPUID),a0
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add -1,a0
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add a0,a0
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add a0,a0
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mov (start_stack,a0),a0
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mov a0,sp
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jmp initialize_secondary
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# Jump here after RTI to suppress the icache lookahead
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end:
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