diff options
Diffstat (limited to 'arch/arm/cpu/interrupts.c')
| -rw-r--r-- | arch/arm/cpu/interrupts.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/arm/cpu/interrupts.c b/arch/arm/cpu/interrupts.c index 23f8b3f029..418da18b44 100644 --- a/arch/arm/cpu/interrupts.c +++ b/arch/arm/cpu/interrupts.c @@ -1,3 +1,30 @@ +/* + * interrupts.c - Interrupt Support Routines + * + * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file + * @brief Interrupt Support Routines + */ + #include <common.h> #include <asm/ptrace.h> @@ -32,12 +59,19 @@ int disable_interrupts (void) } #endif +/** + * FIXME + */ void bad_mode (void) { panic ("Resetting CPU ...\n"); reset_cpu (0); } +/** + * Display current register set content + * @param[in] regs Guess what + */ void show_regs (struct pt_regs *regs) { unsigned long flags; @@ -75,6 +109,10 @@ void show_regs (struct pt_regs *regs) thumb_mode (regs) ? " (T)" : ""); } +/** + * 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"); @@ -82,6 +120,13 @@ void do_undefined_instruction (struct pt_regs *pt_regs) bad_mode (); } +/** + * The CPU catches a software interrupt + * @param[in] pt_regs Register set content when the interrupt happens + * + * There is not functione behind this feature. So what to do else than + * a reset? + */ void do_software_interrupt (struct pt_regs *pt_regs) { printf ("software interrupt\n"); @@ -89,6 +134,12 @@ void do_software_interrupt (struct pt_regs *pt_regs) bad_mode (); } +/** + * The CPU catches a prefetch abort. That really should not happen! + * @param[in] pt_regs Register set content when the accident happens + * + * FIXME: What does it mean, why is reset the only solution? + */ void do_prefetch_abort (struct pt_regs *pt_regs) { printf ("prefetch abort\n"); @@ -96,6 +147,12 @@ void do_prefetch_abort (struct pt_regs *pt_regs) bad_mode (); } +/** + * The CPU catches a data abort. That really should not happen! + * @param[in] pt_regs Register set content when the accident happens + * + * FIXME: What does it mean, why is reset the only solution? + */ void do_data_abort (struct pt_regs *pt_regs) { printf ("data abort\n"); @@ -103,6 +160,12 @@ void do_data_abort (struct pt_regs *pt_regs) bad_mode (); } +/** + * The CPU catches a not-used(?) abort. + * @param[in] pt_regs Register set content when the accident happens + * + * FIXME: What does it mean, why is reset the only solution? + */ void do_not_used (struct pt_regs *pt_regs) { printf ("not used\n"); @@ -110,6 +173,12 @@ void do_not_used (struct pt_regs *pt_regs) bad_mode (); } +/** + * The CPU catches a fast interrupt request. + * @param[in] pt_regs Register set content when the interrupt happens + * + * FIXME: What does it mean, why is reset the only solution? + */ void do_fiq (struct pt_regs *pt_regs) { printf ("fast interrupt request\n"); @@ -117,9 +186,21 @@ void do_fiq (struct pt_regs *pt_regs) bad_mode (); } +/** + * The CPU catches a regular interrupt. + * @param[in] pt_regs Register set content when the interrupt happens + * + * FIXME: What does it mean, why is reset the only solution? + */ void do_irq (struct pt_regs *pt_regs) { printf ("interrupt request\n"); show_regs (pt_regs); bad_mode (); } + +/** + * @page arm_interrupts Interrupt handling on ARM + * + * Why U-boot doesn't use interrupts? + */ |