powerpc/platforms: Move files from 4xx to 44x

Only 44x uses 4xx now, so only keep one directory.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240628121201.130802-7-mpe@ellerman.id.au

1 files changed, 0 insertions, 331 deletions

diff --git a/arch/powerpc/platforms/4xx/uic.c b/arch/powerpc/platforms/4xx/uic.c
deleted file mode 100644
index e3e148b9dd18..000000000000
--- a/arch/powerpc/platforms/4xx/uic.c
+++ /dev/null
@@ -1,331 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * arch/powerpc/sysdev/uic.c
- *
- * IBM PowerPC 4xx Universal Interrupt Controller
- *
- * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/reboot.h>
-#include <linux/slab.h>
-#include <linux/stddef.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/device.h>
-#include <linux/spinlock.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/dcr.h>
-#include <asm/uic.h>
-
-#define NR_UIC_INTS	32
-
-#define UIC_SR		0x0
-#define UIC_ER		0x2
-#define UIC_CR		0x3
-#define UIC_PR		0x4
-#define UIC_TR		0x5
-#define UIC_MSR		0x6
-#define UIC_VR		0x7
-#define UIC_VCR		0x8
-
-struct uic *primary_uic;
-
-struct uic {
-	int index;
-	int dcrbase;
-
-	raw_spinlock_t lock;
-
-	/* The remapper for this UIC */
-	struct irq_domain	*irqhost;
-};
-
-static void uic_unmask_irq(struct irq_data *d)
-{
-	struct uic *uic = irq_data_get_irq_chip_data(d);
-	unsigned int src = irqd_to_hwirq(d);
-	unsigned long flags;
-	u32 er, sr;
-
-	sr = 1 << (31-src);
-	raw_spin_lock_irqsave(&uic->lock, flags);
-	/* ack level-triggered interrupts here */
-	if (irqd_is_level_type(d))
-		mtdcr(uic->dcrbase + UIC_SR, sr);
-	er = mfdcr(uic->dcrbase + UIC_ER);
-	er |= sr;
-	mtdcr(uic->dcrbase + UIC_ER, er);
-	raw_spin_unlock_irqrestore(&uic->lock, flags);
-}
-
-static void uic_mask_irq(struct irq_data *d)
-{
-	struct uic *uic = irq_data_get_irq_chip_data(d);
-	unsigned int src = irqd_to_hwirq(d);
-	unsigned long flags;
-	u32 er;
-
-	raw_spin_lock_irqsave(&uic->lock, flags);
-	er = mfdcr(uic->dcrbase + UIC_ER);
-	er &= ~(1 << (31 - src));
-	mtdcr(uic->dcrbase + UIC_ER, er);
-	raw_spin_unlock_irqrestore(&uic->lock, flags);
-}
-
-static void uic_ack_irq(struct irq_data *d)
-{
-	struct uic *uic = irq_data_get_irq_chip_data(d);
-	unsigned int src = irqd_to_hwirq(d);
-	unsigned long flags;
-
-	raw_spin_lock_irqsave(&uic->lock, flags);
-	mtdcr(uic->dcrbase + UIC_SR, 1 << (31-src));
-	raw_spin_unlock_irqrestore(&uic->lock, flags);
-}
-
-static void uic_mask_ack_irq(struct irq_data *d)
-{
-	struct uic *uic = irq_data_get_irq_chip_data(d);
-	unsigned int src = irqd_to_hwirq(d);
-	unsigned long flags;
-	u32 er, sr;
-
-	sr = 1 << (31-src);
-	raw_spin_lock_irqsave(&uic->lock, flags);
-	er = mfdcr(uic->dcrbase + UIC_ER);
-	er &= ~sr;
-	mtdcr(uic->dcrbase + UIC_ER, er);
- 	/* On the UIC, acking (i.e. clearing the SR bit)
-	 * a level irq will have no effect if the interrupt
-	 * is still asserted by the device, even if
-	 * the interrupt is already masked. Therefore
-	 * we only ack the egde interrupts here, while
-	 * level interrupts are ack'ed after the actual
-	 * isr call in the uic_unmask_irq()
-	 */
-	if (!irqd_is_level_type(d))
-		mtdcr(uic->dcrbase + UIC_SR, sr);
-	raw_spin_unlock_irqrestore(&uic->lock, flags);
-}
-
-static int uic_set_irq_type(struct irq_data *d, unsigned int flow_type)
-{
-	struct uic *uic = irq_data_get_irq_chip_data(d);
-	unsigned int src = irqd_to_hwirq(d);
-	unsigned long flags;
-	int trigger, polarity;
-	u32 tr, pr, mask;
-
-	switch (flow_type & IRQ_TYPE_SENSE_MASK) {
-	case IRQ_TYPE_NONE:
-		uic_mask_irq(d);
-		return 0;
-
-	case IRQ_TYPE_EDGE_RISING:
-		trigger = 1; polarity = 1;
-		break;
-	case IRQ_TYPE_EDGE_FALLING:
-		trigger = 1; polarity = 0;
-		break;
-	case IRQ_TYPE_LEVEL_HIGH:
-		trigger = 0; polarity = 1;
-		break;
-	case IRQ_TYPE_LEVEL_LOW:
-		trigger = 0; polarity = 0;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	mask = ~(1 << (31 - src));
-
-	raw_spin_lock_irqsave(&uic->lock, flags);
-	tr = mfdcr(uic->dcrbase + UIC_TR);
-	pr = mfdcr(uic->dcrbase + UIC_PR);
-	tr = (tr & mask) | (trigger << (31-src));
-	pr = (pr & mask) | (polarity << (31-src));
-
-	mtdcr(uic->dcrbase + UIC_PR, pr);
-	mtdcr(uic->dcrbase + UIC_TR, tr);
-	mtdcr(uic->dcrbase + UIC_SR, ~mask);
-
-	raw_spin_unlock_irqrestore(&uic->lock, flags);
-
-	return 0;
-}
-
-static struct irq_chip uic_irq_chip = {
-	.name		= "UIC",
-	.irq_unmask	= uic_unmask_irq,
-	.irq_mask	= uic_mask_irq,
-	.irq_mask_ack	= uic_mask_ack_irq,
-	.irq_ack	= uic_ack_irq,
-	.irq_set_type	= uic_set_irq_type,
-};
-
-static int uic_host_map(struct irq_domain *h, unsigned int virq,
-			irq_hw_number_t hw)
-{
-	struct uic *uic = h->host_data;
-
-	irq_set_chip_data(virq, uic);
-	/* Despite the name, handle_level_irq() works for both level
-	 * and edge irqs on UIC.  FIXME: check this is correct */
-	irq_set_chip_and_handler(virq, &uic_irq_chip, handle_level_irq);
-
-	/* Set default irq type */
-	irq_set_irq_type(virq, IRQ_TYPE_NONE);
-
-	return 0;
-}
-
-static const struct irq_domain_ops uic_host_ops = {
-	.map	= uic_host_map,
-	.xlate	= irq_domain_xlate_twocell,
-};
-
-static void uic_irq_cascade(struct irq_desc *desc)
-{
-	struct irq_chip *chip = irq_desc_get_chip(desc);
-	struct irq_data *idata = irq_desc_get_irq_data(desc);
-	struct uic *uic = irq_desc_get_handler_data(desc);
-	u32 msr;
-	int src;
-
-	raw_spin_lock(&desc->lock);
-	if (irqd_is_level_type(idata))
-		chip->irq_mask(idata);
-	else
-		chip->irq_mask_ack(idata);
-	raw_spin_unlock(&desc->lock);
-
-	msr = mfdcr(uic->dcrbase + UIC_MSR);
-	if (!msr) /* spurious interrupt */
-		goto uic_irq_ret;
-
-	src = 32 - ffs(msr);
-
-	generic_handle_domain_irq(uic->irqhost, src);
-
-uic_irq_ret:
-	raw_spin_lock(&desc->lock);
-	if (irqd_is_level_type(idata))
-		chip->irq_ack(idata);
-	if (!irqd_irq_disabled(idata) && chip->irq_unmask)
-		chip->irq_unmask(idata);
-	raw_spin_unlock(&desc->lock);
-}
-
-static struct uic * __init uic_init_one(struct device_node *node)
-{
-	struct uic *uic;
-	const u32 *indexp, *dcrreg;
-	int len;
-
-	BUG_ON(! of_device_is_compatible(node, "ibm,uic"));
-
-	uic = kzalloc(sizeof(*uic), GFP_KERNEL);
-	if (! uic)
-		return NULL; /* FIXME: panic? */
-
-	raw_spin_lock_init(&uic->lock);
-	indexp = of_get_property(node, "cell-index", &len);
-	if (!indexp || (len != sizeof(u32))) {
-		printk(KERN_ERR "uic: Device node %pOF has missing or invalid "
-		       "cell-index property\n", node);
-		return NULL;
-	}
-	uic->index = *indexp;
-
-	dcrreg = of_get_property(node, "dcr-reg", &len);
-	if (!dcrreg || (len != 2*sizeof(u32))) {
-		printk(KERN_ERR "uic: Device node %pOF has missing or invalid "
-		       "dcr-reg property\n", node);
-		return NULL;
-	}
-	uic->dcrbase = *dcrreg;
-
-	uic->irqhost = irq_domain_add_linear(node, NR_UIC_INTS, &uic_host_ops,
-					     uic);
-	if (! uic->irqhost)
-		return NULL; /* FIXME: panic? */
-
-	/* Start with all interrupts disabled, level and non-critical */
-	mtdcr(uic->dcrbase + UIC_ER, 0);
-	mtdcr(uic->dcrbase + UIC_CR, 0);
-	mtdcr(uic->dcrbase + UIC_TR, 0);
-	/* Clear any pending interrupts, in case the firmware left some */
-	mtdcr(uic->dcrbase + UIC_SR, 0xffffffff);
-
-	printk ("UIC%d (%d IRQ sources) at DCR 0x%x\n", uic->index,
-		NR_UIC_INTS, uic->dcrbase);
-
-	return uic;
-}
-
-void __init uic_init_tree(void)
-{
-	struct device_node *np;
-	struct uic *uic;
-	const u32 *interrupts;
-
-	/* First locate and initialize the top-level UIC */
-	for_each_compatible_node(np, NULL, "ibm,uic") {
-		interrupts = of_get_property(np, "interrupts", NULL);
-		if (!interrupts)
-			break;
-	}
-
-	BUG_ON(!np); /* uic_init_tree() assumes there's a UIC as the
-		      * top-level interrupt controller */
-	primary_uic = uic_init_one(np);
-	if (!primary_uic)
-		panic("Unable to initialize primary UIC %pOF\n", np);
-
-	irq_set_default_host(primary_uic->irqhost);
-	of_node_put(np);
-
-	/* The scan again for cascaded UICs */
-	for_each_compatible_node(np, NULL, "ibm,uic") {
-		interrupts = of_get_property(np, "interrupts", NULL);
-		if (interrupts) {
-			/* Secondary UIC */
-			int cascade_virq;
-
-			uic = uic_init_one(np);
-			if (! uic)
-				panic("Unable to initialize a secondary UIC %pOF\n",
-				      np);
-
-			cascade_virq = irq_of_parse_and_map(np, 0);
-
-			irq_set_handler_data(cascade_virq, uic);
-			irq_set_chained_handler(cascade_virq, uic_irq_cascade);
-
-			/* FIXME: setup critical cascade?? */
-		}
-	}
-}
-
-/* Return an interrupt vector or 0 if no interrupt is pending. */
-unsigned int uic_get_irq(void)
-{
-	u32 msr;
-	int src;
-
-	BUG_ON(! primary_uic);
-
-	msr = mfdcr(primary_uic->dcrbase + UIC_MSR);
-	src = 32 - ffs(msr);
-
-	return irq_linear_revmap(primary_uic->irqhost, src);
-}