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authorTimur Tabi <timur@freescale.com>2008-07-24 00:31:39 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 13:47:40 -0400
commit6b51d51a9d24719f905ba9657b29e04efd82a7ea (patch)
treed941de4b541320f0b89f265fb6acbee2607e0081 /drivers/net/sh_eth.h
parentc25826a7cf1c61b5c6e6db8365172eb97ef39ef3 (diff)
fsl-diu-fb: update Freescale DIU driver to use page_alloc_exact()
Update the Freescale DIU driver to use page_alloc_exact() to allocate a DMA buffer. This also eliminates the rheap-based memory allocator. We can do this now because commit 6ccf61f9 allows us to allocate 8MB physically- contiguous memory blocks. [akpm@linux-foundation.org: fix printk warnings] Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/net/sh_eth.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-21 04:12:32 -0400
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/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * 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.
 */

#include <linux/bug.h>
#include <linux/hardirq.h>
#include <linux/init.h>
#include <linux/kallsyms.h>
#include <linux/kdebug.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/sched.h>
#include <linux/uaccess.h>

#include <asm/addrspace.h>
#include <asm/mmu_context.h>
#include <asm/ocd.h>
#include <asm/sysreg.h>
#include <asm/traps.h>

static DEFINE_SPINLOCK(die_lock);

void NORET_TYPE die(const char *str, struct pt_regs *regs, long err)
{
	static int die_counter;

	console_verbose();
	spin_lock_irq(&die_lock);
	bust_spinlocks(1);

	printk(KERN_ALERT "Oops: %s, sig: %ld [#%d]\n",
	       str, err, ++die_counter);

	printk(KERN_EMERG);

#ifdef CONFIG_PREEMPT
	printk(KERN_CONT "PREEMPT ");
#endif
#ifdef CONFIG_FRAME_POINTER
	printk(KERN_CONT "FRAME_POINTER ");
#endif
	if (current_cpu_data.features & AVR32_FEATURE_OCD) {
		unsigned long did = ocd_read(DID);
		printk(KERN_CONT "chip: 0x%03lx:0x%04lx rev %lu\n",
		       (did >> 1) & 0x7ff,
		       (did >> 12) & 0x7fff,
		       (did >> 28) & 0xf);
	} else {
		printk(KERN_CONT "cpu: arch %u r%u / core %u r%u\n",
		       current_cpu_data.arch_type,
		       current_cpu_data.arch_revision,
		       current_cpu_data.cpu_type,
		       current_cpu_data.cpu_revision);
	}

	print_modules();
	show_regs_log_lvl(regs, KERN_EMERG);
	show_stack_log_lvl(current, regs->sp, regs, KERN_EMERG);
	bust_spinlocks(0);
	add_taint(TAINT_DIE);
	spin_unlock_irq(&die_lock);

	if (in_interrupt())
		panic("Fatal exception in interrupt");

	if (panic_on_oops)
		panic("Fatal exception");

	do_exit(err);
}

void _exception(long signr, struct pt_regs *regs, int code,
		unsigned long addr)
{
	siginfo_t info;

	if (!user_mode(regs)) {
		const struct exception_table_entry *fixup;

		/* Are we prepared to handle this kernel fault? */
		fixup = search_exception_tables(regs->pc);
		if (fixup) {
			regs->pc = fixup->fixup;
			return;
		}
		die("Unhandled exception in kernel mode", regs, signr);
	}

	memset(&info, 0, sizeof(info));
	info.si_signo = signr;
	info.si_code = code;
	info.si_addr = (void __user *)addr;
	force_sig_info(signr, &info, current);
}

asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs)
{
	int ret;

	nmi_enter();

	ret = notify_die(DIE_NMI, "NMI", regs, 0, ecr, SIGINT);
	switch (ret) {
	case NOTIFY_OK:
	case NOTIFY_STOP:
		break;
	case NOTIFY_BAD:
		die("Fatal Non-Maskable Interrupt", regs, SIGINT);
	default:
		printk(KERN_ALERT "Got NMI, but nobody cared. Disabling...\n");
		nmi_disable();
		break;
	}
	nmi_exit();
}

asmlinkage void do_critical_exception(unsigned long ecr, struct pt_regs *regs)
{
	die("Critical exception", regs, SIGKILL);
}

asmlinkage void do_address_exception(unsigned long ecr, struct pt_regs *regs)
{
	_exception(SIGBUS, regs, BUS_ADRALN, regs->pc);
}

/* This way of handling undefined instructions is stolen from ARM */
static LIST_HEAD(undef_hook);
static DEFINE_SPINLOCK(undef_lock);

void register_undef_hook(struct undef_hook *hook)
{
	spin_lock_irq(&undef_lock);
	list_add(&hook->node, &undef_hook);
	spin_unlock_irq(&undef_lock);
}

void unregister_undef_hook(struct undef_hook *hook)
{
	spin_lock_irq(&undef_lock);
	list_del(&hook->node);
	spin_unlock_irq(&undef_lock);
}

static int do_cop_absent(u32 insn)
{
	int cop_nr;
	u32 cpucr;

	if ((insn & 0xfdf00000) == 0xf1900000)