2011-11-01 07:39:14 +08:00
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/*
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* Mostly IRQ support for Hexagon
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*
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2013-03-29 09:45:40 +08:00
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* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
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2011-11-01 07:39:14 +08:00
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*
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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 version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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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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*
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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., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <linux/kernel.h>
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#include <asm/registers.h>
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#include <linux/irq.h>
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#include <linux/hardirq.h>
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/*
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* show_regs - print pt_regs structure
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* @regs: pointer to pt_regs
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*
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* To-do: add all the accessor definitions to registers.h
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*
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* Will make this routine a lot easier to write.
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*/
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void show_regs(struct pt_regs *regs)
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{
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dump_stack: unify debug information printed by show_regs()
show_regs() is inherently arch-dependent but it does make sense to print
generic debug information and some archs already do albeit in slightly
different forms. This patch introduces a generic function to print debug
information from show_regs() so that different archs print out the same
information and it's much easier to modify what's printed.
show_regs_print_info() prints out the same debug info as dump_stack()
does plus task and thread_info pointers.
* Archs which didn't print debug info now do.
alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
um, xtensa
* Already prints debug info. Replaced with show_regs_print_info().
The printed information is superset of what used to be there.
arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
* s390 is special in that it used to print arch-specific information
along with generic debug info. Heiko and Martin think that the
arch-specific extra isn't worth keeping s390 specfic implementation.
Converted to use the generic version.
Note that now all archs print the debug info before actual register
dumps.
An example BUG() dump follows.
kernel BUG at /work/os/work/kernel/workqueue.c:4841!
invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
Hardware name: empty empty/S3992, BIOS 080011 10/26/2007
task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
RIP: 0010:[<ffffffff8234a07e>] [<ffffffff8234a07e>] init_workqueues+0x4/0x6
RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246
RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
Call Trace:
[<ffffffff81000312>] do_one_initcall+0x122/0x170
[<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8
[<ffffffff81c47760>] ? rest_init+0x140/0x140
[<ffffffff81c4776e>] kernel_init+0xe/0xf0
[<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0
[<ffffffff81c47760>] ? rest_init+0x140/0x140
...
v2: Typo fix in x86-32.
v3: CPU number dropped from show_regs_print_info() as
dump_stack_print_info() has been updated to print it. s390
specific implementation dropped as requested by s390 maintainers.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com> [tile bits]
Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-01 06:27:17 +08:00
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show_regs_print_info(KERN_EMERG);
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2011-11-01 07:39:14 +08:00
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printk(KERN_EMERG "restart_r0: \t0x%08lx syscall_nr: %ld\n",
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regs->restart_r0, regs->syscall_nr);
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printk(KERN_EMERG "preds: \t\t0x%08lx\n", regs->preds);
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printk(KERN_EMERG "lc0: \t0x%08lx sa0: 0x%08lx m0: 0x%08lx\n",
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regs->lc0, regs->sa0, regs->m0);
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printk(KERN_EMERG "lc1: \t0x%08lx sa1: 0x%08lx m1: 0x%08lx\n",
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regs->lc1, regs->sa1, regs->m1);
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printk(KERN_EMERG "gp: \t0x%08lx ugp: 0x%08lx usr: 0x%08lx\n",
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regs->gp, regs->ugp, regs->usr);
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2012-03-28 06:38:09 +08:00
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printk(KERN_EMERG "cs0: \t0x%08lx cs1: 0x%08lx\n",
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regs->cs0, regs->cs1);
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2011-11-01 07:39:14 +08:00
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printk(KERN_EMERG "r0: \t0x%08lx %08lx %08lx %08lx\n", regs->r00,
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regs->r01,
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regs->r02,
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regs->r03);
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printk(KERN_EMERG "r4: \t0x%08lx %08lx %08lx %08lx\n", regs->r04,
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regs->r05,
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regs->r06,
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regs->r07);
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printk(KERN_EMERG "r8: \t0x%08lx %08lx %08lx %08lx\n", regs->r08,
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regs->r09,
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regs->r10,
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regs->r11);
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printk(KERN_EMERG "r12: \t0x%08lx %08lx %08lx %08lx\n", regs->r12,
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regs->r13,
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regs->r14,
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regs->r15);
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printk(KERN_EMERG "r16: \t0x%08lx %08lx %08lx %08lx\n", regs->r16,
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regs->r17,
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regs->r18,
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regs->r19);
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printk(KERN_EMERG "r20: \t0x%08lx %08lx %08lx %08lx\n", regs->r20,
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regs->r21,
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regs->r22,
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regs->r23);
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printk(KERN_EMERG "r24: \t0x%08lx %08lx %08lx %08lx\n", regs->r24,
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regs->r25,
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regs->r26,
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regs->r27);
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printk(KERN_EMERG "r28: \t0x%08lx %08lx %08lx %08lx\n", regs->r28,
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regs->r29,
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regs->r30,
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regs->r31);
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printk(KERN_EMERG "elr: \t0x%08lx cause: 0x%08lx user_mode: %d\n",
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pt_elr(regs), pt_cause(regs), user_mode(regs));
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printk(KERN_EMERG "psp: \t0x%08lx badva: 0x%08lx int_enabled: %d\n",
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pt_psp(regs), pt_badva(regs), ints_enabled(regs));
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}
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void dummy_handler(struct pt_regs *regs)
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{
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unsigned int elr = pt_elr(regs);
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printk(KERN_ERR "Unimplemented handler; ELR=0x%08x\n", elr);
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}
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void arch_do_IRQ(struct pt_regs *regs)
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{
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int irq = pt_cause(regs);
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struct pt_regs *old_regs = set_irq_regs(regs);
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irq_enter();
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generic_handle_irq(irq);
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irq_exit();
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set_irq_regs(old_regs);
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}
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