Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 335 insertions, 0 deletions

diff --git a/arch/m68knommu/platform/68360/ints.c b/arch/m68knommu/platform/68360/ints.c
new file mode 100644
index 00000000000..ba184db1651
--- /dev/null
+++ b/arch/m68knommu/platform/68360/ints.c
@@ -0,0 +1,335 @@
+/*
+ * linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2000  Michael Leslie <mleslie@lineo.com>
+ * Copyright (c) 1996 Roman Zippel
+ * Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/errno.h>
+
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/setup.h>
+#include <asm/m68360.h>
+
+/* from quicc/commproc.c: */
+extern QUICC *pquicc;
+extern void cpm_interrupt_init(void);
+
+#define INTERNAL_IRQS (96)
+
+/* assembler routines */
+asmlinkage void system_call(void);
+asmlinkage void buserr(void);
+asmlinkage void trap(void);
+asmlinkage irqreturn_t bad_interrupt(void);
+asmlinkage irqreturn_t inthandler(void);
+
+extern void *_ramvec[];
+
+/* The number of spurious interrupts */
+volatile unsigned int num_spurious;
+unsigned int local_irq_count[NR_CPUS];
+
+/* irq node variables for the 32 (potential) on chip sources */
+static irq_node_t int_irq_list[INTERNAL_IRQS];
+
+static short int_irq_ablecount[INTERNAL_IRQS];
+
+/*
+ * This function should be called during kernel startup to initialize
+ * IRQ handling routines.
+ */
+
+void init_IRQ(void)
+{
+	int i;
+	int vba = (CPM_VECTOR_BASE<<4);
+
+	/* set up the vectors */
+	_ramvec[2] = buserr;
+	_ramvec[3] = trap;
+	_ramvec[4] = trap;
+	_ramvec[5] = trap;
+	_ramvec[6] = trap;
+	_ramvec[7] = trap;
+	_ramvec[8] = trap;
+	_ramvec[9] = trap;
+	_ramvec[10] = trap;
+	_ramvec[11] = trap;
+	_ramvec[12] = trap;
+	_ramvec[13] = trap;
+	_ramvec[14] = trap;
+	_ramvec[15] = trap;
+
+	_ramvec[32] = system_call;
+	_ramvec[33] = trap;
+
+
+	cpm_interrupt_init();
+
+	/* set up CICR for vector base address and irq level */
+	/* irl = 4, hp = 1f - see MC68360UM p 7-377 */
+	pquicc->intr_cicr = 0x00e49f00 | vba;
+
+	/* CPM interrupt vectors: (p 7-376) */
+	_ramvec[vba+CPMVEC_ERROR]       = bad_interrupt; /* Error */
+	_ramvec[vba+CPMVEC_PIO_PC11]    = inthandler;   /* pio - pc11 */
+	_ramvec[vba+CPMVEC_PIO_PC10]    = inthandler;   /* pio - pc10 */
+	_ramvec[vba+CPMVEC_SMC2]        = inthandler;   /* smc2/pip */
+	_ramvec[vba+CPMVEC_SMC1]        = inthandler;   /* smc1 */
+	_ramvec[vba+CPMVEC_SPI]         = inthandler;   /* spi */
+	_ramvec[vba+CPMVEC_PIO_PC9]     = inthandler;   /* pio - pc9 */
+	_ramvec[vba+CPMVEC_TIMER4]      = inthandler;   /* timer 4 */
+	_ramvec[vba+CPMVEC_RESERVED1]   = inthandler;   /* reserved */
+	_ramvec[vba+CPMVEC_PIO_PC8]     = inthandler;   /* pio - pc8 */
+	_ramvec[vba+CPMVEC_PIO_PC7]     = inthandler;  /* pio - pc7 */
+	_ramvec[vba+CPMVEC_PIO_PC6]     = inthandler;  /* pio - pc6 */
+	_ramvec[vba+CPMVEC_TIMER3]      = inthandler;  /* timer 3 */
+	_ramvec[vba+CPMVEC_RISCTIMER]   = inthandler;  /* reserved */
+	_ramvec[vba+CPMVEC_PIO_PC5]     = inthandler;  /* pio - pc5 */
+	_ramvec[vba+CPMVEC_PIO_PC4]     = inthandler;  /* pio - pc4 */
+	_ramvec[vba+CPMVEC_RESERVED2]   = inthandler;  /* reserved */
+	_ramvec[vba+CPMVEC_RISCTIMER]   = inthandler;  /* timer table */
+	_ramvec[vba+CPMVEC_TIMER2]      = inthandler;  /* timer 2 */
+	_ramvec[vba+CPMVEC_RESERVED3]   = inthandler;  /* reserved */
+	_ramvec[vba+CPMVEC_IDMA2]       = inthandler;  /* idma 2 */
+	_ramvec[vba+CPMVEC_IDMA1]       = inthandler;  /* idma 1 */
+	_ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler;  /* sdma channel bus error */
+	_ramvec[vba+CPMVEC_PIO_PC3]     = inthandler;  /* pio - pc3 */
+	_ramvec[vba+CPMVEC_PIO_PC2]     = inthandler;  /* pio - pc2 */
+	/* _ramvec[vba+CPMVEC_TIMER1]      = cpm_isr_timer1; */  /* timer 1 */
+	_ramvec[vba+CPMVEC_TIMER1]      = inthandler;  /* timer 1 */
+	_ramvec[vba+CPMVEC_PIO_PC1]     = inthandler;  /* pio - pc1 */
+	_ramvec[vba+CPMVEC_SCC4]        = inthandler;  /* scc 4 */
+	_ramvec[vba+CPMVEC_SCC3]        = inthandler;  /* scc 3 */
+	_ramvec[vba+CPMVEC_SCC2]        = inthandler;  /* scc 2 */
+	_ramvec[vba+CPMVEC_SCC1]        = inthandler;  /* scc 1 */
+	_ramvec[vba+CPMVEC_PIO_PC0]     = inthandler;  /* pio - pc0 */
+
+
+	/* turn off all CPM interrupts */
+	pquicc->intr_cimr = 0x00000000;
+
+	/* initialize handlers */
+	for (i = 0; i < INTERNAL_IRQS; i++) {
+		int_irq_list[i].handler = NULL;
+		int_irq_list[i].flags   = IRQ_FLG_STD;
+		int_irq_list[i].dev_id  = NULL;
+		int_irq_list[i].devname = NULL;
+	}
+}
+
+#if 0
+void M68360_insert_irq(irq_node_t **list, irq_node_t *node)
+{
+	unsigned long flags;
+	irq_node_t *cur;
+
+	if (!node->dev_id)
+		printk(KERN_INFO "%s: Warning: dev_id of %s is zero\n",
+		       __FUNCTION__, node->devname);
+
+	local_irq_save(flags);
+
+	cur = *list;
+
+	while (cur) {
+		list = &cur->next;
+		cur = cur->next;
+	}
+
+	node->next = cur;
+	*list = node;
+
+	local_irq_restore(flags);
+}
+
+void M68360_delete_irq(irq_node_t **list, void *dev_id)
+{
+	unsigned long flags;
+	irq_node_t *node;
+
+	local_irq_save(flags);
+
+	for (node = *list; node; list = &node->next, node = *list) {
+		if (node->dev_id == dev_id) {
+			*list = node->next;
+			/* Mark it as free. */
+			node->handler = NULL;
+			local_irq_restore(flags);
+			return;
+		}
+	}
+	local_irq_restore(flags);
+	printk (KERN_INFO "%s: tried to remove invalid irq\n", __FUNCTION__);
+}
+#endif
+
+int request_irq(
+	unsigned int irq,
+	irqreturn_t (*handler)(int, void *, struct pt_regs *),
+	unsigned long flags,
+	const char *devname,
+	void *dev_id)
+{
+	int mask = (1<<irq);
+
+	irq += (CPM_VECTOR_BASE<<4);
+
+	if (irq >= INTERNAL_IRQS) {
+		printk (KERN_ERR "%s: Unknown IRQ %d from %s\n", __FUNCTION__, irq, devname);
+		return -ENXIO;
+	}
+
+	if (!(int_irq_list[irq].flags & IRQ_FLG_STD)) {
+		if (int_irq_list[irq].flags & IRQ_FLG_LOCK) {
+			printk(KERN_ERR "%s: IRQ %d from %s is not replaceable\n",
+			       __FUNCTION__, irq, int_irq_list[irq].devname);
+			return -EBUSY;
+		}
+		if (flags & IRQ_FLG_REPLACE) {
+			printk(KERN_ERR "%s: %s can't replace IRQ %d from %s\n",
+			       __FUNCTION__, devname, irq, int_irq_list[irq].devname);
+			return -EBUSY;
+		}
+	}
+	int_irq_list[irq].handler = handler;
+	int_irq_list[irq].flags   = flags;
+	int_irq_list[irq].dev_id  = dev_id;
+	int_irq_list[irq].devname = devname;
+
+	/* enable in the CIMR */
+	if (!int_irq_ablecount[irq])
+		pquicc->intr_cimr |= mask;
+	/*      *(volatile unsigned long *)0xfffff304 &= ~(1<<irq); */
+
+	return 0;
+}
+
+EXPORT_SYMBOL(request_irq);
+
+void free_irq(unsigned int irq, void *dev_id)
+{
+	if (irq >= INTERNAL_IRQS) {
+		printk (KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
+		return;
+	}
+
+	if (int_irq_list[irq].dev_id != dev_id)
+		printk(KERN_INFO "%s: removing probably wrong IRQ %d from %s\n",
+		       __FUNCTION__, irq, int_irq_list[irq].devname);
+	int_irq_list[irq].handler = NULL;
+	int_irq_list[irq].flags   = IRQ_FLG_STD;
+	int_irq_list[irq].dev_id  = NULL;
+	int_irq_list[irq].devname = NULL;
+
+	*(volatile unsigned long *)0xfffff304 |= 1<<irq;
+}
+
+EXPORT_SYMBOL(free_irq);
+
+#if 0
+/*
+ * Enable/disable a particular machine specific interrupt source.
+ * Note that this may affect other interrupts in case of a shared interrupt.
+ * This function should only be called for a _very_ short time to change some
+ * internal data, that may not be changed by the interrupt at the same time.
+ * int_(enable|disable)_irq calls may also be nested.
+ */
+void M68360_enable_irq(unsigned int irq)
+{
+	if (irq >= INTERNAL_IRQS) {
+		printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
+		return;
+	}
+
+	if (--int_irq_ablecount[irq])
+		return;
+
+	/* enable the interrupt */
+	*(volatile unsigned long *)0xfffff304 &= ~(1<<irq);
+}
+
+void M68360_disable_irq(unsigned int irq)
+{
+	if (irq >= INTERNAL_IRQS) {
+		printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
+		return;
+	}
+
+	if (int_irq_ablecount[irq]++)
+		return;
+
+	/* disable the interrupt */
+	*(volatile unsigned long *)0xfffff304 |= 1<<irq;
+}
+#endif
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+	int i = *(loff_t *) v;
+
+	if (i < NR_IRQS) {
+		if (int_irq_list[i].devname) {
+			seq_printf(p, "%3d: %10u ", i, kstat_cpu(0).irqs[i]);
+			if (int_irq_list[i].flags & IRQ_FLG_LOCK)
+				seq_printf(p, "L ");
+			else
+				seq_printf(p, "  ");
+			seq_printf(p, "%s\n", int_irq_list[i].devname);
+		}
+	}
+	if (i == NR_IRQS)
+		seq_printf(p, "   : %10u   spurious\n", num_spurious);
+
+	return 0;
+}
+
+/* The 68k family did not have a good way to determine the source
+ * of interrupts until later in the family.  The EC000 core does
+ * not provide the vector number on the stack, we vector everything
+ * into one vector and look in the blasted mask register...
+ * This code is designed to be fast, almost constant time, not clean!
+ */
+void process_int(int vec, struct pt_regs *fp)
+{
+	int irq;
+	int mask;
+
+	/* unsigned long pend = *(volatile unsigned long *)0xfffff30c; */
+
+	/* irq = vec + (CPM_VECTOR_BASE<<4); */
+	irq = vec;
+
+	/* unsigned long pend = *(volatile unsigned long *)pquicc->intr_cipr; */
+
+	/* Bugger all that weirdness. For the moment, I seem to know where I came from;
+	 * vec is passed from a specific ISR, so I'll use it. */
+
+	if (int_irq_list[irq].handler) {
+		int_irq_list[irq].handler(irq , int_irq_list[irq].dev_id, fp);
+		kstat_cpu(0).irqs[irq]++;
+		pquicc->intr_cisr = (1 << vec); /* indicate that irq has been serviced */
+	} else {
+		printk(KERN_ERR "unregistered interrupt %d!\nTurning it off in the CIMR...\n", irq);
+		/* *(volatile unsigned long *)0xfffff304 |= mask; */
+		pquicc->intr_cimr &= ~(1 << vec);
+		num_spurious += 1;
+	}
+	return(IRQ_HANDLED);
+}