diff options
Diffstat (limited to 'arch/arm/cpu/interrupts.c')
| -rw-r--r-- | arch/arm/cpu/interrupts.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/arch/arm/cpu/interrupts.c b/arch/arm/cpu/interrupts.c deleted file mode 100644 index 703a5a3ba7..0000000000 --- a/arch/arm/cpu/interrupts.c +++ /dev/null @@ -1,179 +0,0 @@ -/* - * interrupts.c - Interrupt Support Routines - * - * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -/** - * @file - * @brief Interrupt Support Routines - */ - -#include <common.h> -#include <abort.h> -#include <asm/ptrace.h> -#include <asm/unwind.h> -#include <init.h> - -/* Avoid missing prototype warning, called from assembly */ -void do_undefined_instruction (struct pt_regs *pt_regs); -void do_software_interrupt (struct pt_regs *pt_regs); -void do_prefetch_abort (struct pt_regs *pt_regs); -void do_data_abort (struct pt_regs *pt_regs); -void do_fiq (struct pt_regs *pt_regs); -void do_irq (struct pt_regs *pt_regs); - -/** - * Display current register set content - * @param[in] regs Guess what - */ -void show_regs (struct pt_regs *regs) -{ - unsigned long flags; - const char *processor_modes[] = { - "USER_26", "FIQ_26", "IRQ_26", "SVC_26", - "UK4_26", "UK5_26", "UK6_26", "UK7_26", - "UK8_26", "UK9_26", "UK10_26", "UK11_26", - "UK12_26", "UK13_26", "UK14_26", "UK15_26", - "USER_32", "FIQ_32", "IRQ_32", "SVC_32", - "UK4_32", "UK5_32", "UK6_32", "ABT_32", - "UK8_32", "UK9_32", "UK10_32", "UND_32", - "UK12_32", "UK13_32", "UK14_32", "SYS_32", - }; - - flags = condition_codes (regs); - - printf ("pc : [<%08lx>] lr : [<%08lx>]\n" - "sp : %08lx ip : %08lx fp : %08lx\n", - instruction_pointer (regs), - regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); - printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", - regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); - printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", - regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); - printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", - regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); - printf ("Flags: %c%c%c%c", - flags & PSR_N_BIT ? 'N' : 'n', - flags & PSR_Z_BIT ? 'Z' : 'z', - flags & PSR_C_BIT ? 'C' : 'c', flags & PSR_V_BIT ? 'V' : 'v'); - printf (" IRQs %s FIQs %s Mode %s%s\n", - interrupts_enabled (regs) ? "on" : "off", - fast_interrupts_enabled (regs) ? "on" : "off", - processor_modes[processor_mode (regs)], - thumb_mode (regs) ? " (T)" : ""); -#ifdef CONFIG_ARM_UNWIND - unwind_backtrace(regs); -#endif -} - -static void __noreturn do_exception(struct pt_regs *pt_regs) -{ - show_regs(pt_regs); - - panic(""); -} - -/** - * The CPU runs into an undefined instruction. That really should not happen! - * @param[in] pt_regs Register set content when the accident happens - */ -void do_undefined_instruction (struct pt_regs *pt_regs) -{ - printf ("undefined instruction\n"); - do_exception(pt_regs); -} - -/** - * The CPU catches a software interrupt - * @param[in] pt_regs Register set content when the interrupt happens - * - * There is no function behind this feature. So what to do else than - * a reset? - */ -void do_software_interrupt (struct pt_regs *pt_regs) -{ - printf ("software interrupt\n"); - do_exception(pt_regs); -} - -/** - * The CPU catches a prefetch abort. That really should not happen! - * @param[in] pt_regs Register set content when the accident happens - * - * instruction fetch from an unmapped area - */ -void do_prefetch_abort (struct pt_regs *pt_regs) -{ - printf ("prefetch abort\n"); - do_exception(pt_regs); -} - -/** - * The CPU catches a data abort. That really should not happen! - * @param[in] pt_regs Register set content when the accident happens - * - * data fetch from an unmapped area - */ -void do_data_abort (struct pt_regs *pt_regs) -{ - u32 far; - - asm volatile ("mrc p15, 0, %0, c6, c0, 0" : "=r" (far) : : "cc"); - - printf("unable to handle %s at address 0x%08x\n", - far < PAGE_SIZE ? "NULL pointer dereference" : - "paging request", far); - - do_exception(pt_regs); -} - -/** - * The CPU catches a fast interrupt request. - * @param[in] pt_regs Register set content when the interrupt happens - * - * We never enable FIQs, so this should not happen - */ -void do_fiq (struct pt_regs *pt_regs) -{ - printf ("fast interrupt request\n"); - do_exception(pt_regs); -} - -/** - * The CPU catches a regular interrupt. - * @param[in] pt_regs Register set content when the interrupt happens - * - * We never enable interrupts, so this should not happen - */ -void do_irq (struct pt_regs *pt_regs) -{ - printf ("interrupt request\n"); - do_exception(pt_regs); -} - -extern volatile int arm_ignore_data_abort; -extern volatile int arm_data_abort_occurred; - -void data_abort_mask(void) -{ - arm_data_abort_occurred = 0; - arm_ignore_data_abort = 1; -} - -int data_abort_unmask(void) -{ - arm_ignore_data_abort = 0; - - return arm_data_abort_occurred != 0; -} |