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