[linux-block.git] / arch / alpha / kernel / sys_nautilus.c

// SPDX-License-Identifier: GPL-2.0
/*
 *	linux/arch/alpha/kernel/sys_nautilus.c
 *
 *	Copyright (C) 1995 David A Rusling
 *	Copyright (C) 1998 Richard Henderson
 *	Copyright (C) 1999 Alpha Processor, Inc.,
 *		(David Daniel, Stig Telfer, Soohoon Lee)
 *
 * Code supporting NAUTILUS systems.
 *
 *
 * NAUTILUS has the following I/O features:
 *
 * a) Driven by AMD 751 aka IRONGATE (northbridge):
 *     4 PCI slots
 *     1 AGP slot
 *
 * b) Driven by ALI M1543C (southbridge)
 *     2 ISA slots
 *     2 IDE connectors
 *     1 dual drive capable FDD controller
 *     2 serial ports
 *     1 ECP/EPP/SP parallel port
 *     2 USB ports
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/reboot.h>
#include <linux/memblock.h>
#include <linux/bitops.h>

#include <asm/ptrace.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_irongate.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

#include "proto.h"
#include "err_impl.h"
#include "irq_impl.h"
#include "pci_impl.h"
#include "machvec_impl.h"


static void __init
nautilus_init_irq(void)
{
	if (alpha_using_srm) {
		alpha_mv.device_interrupt = srm_device_interrupt;
	}

	init_i8259a_irqs();
	common_init_isa_dma();
}

static int
nautilus_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
	/* Preserve the IRQ set up by the console.  */

	u8 irq;
	/* UP1500: AGP INTA is actually routed to IRQ 5, not IRQ 10 as
	   console reports. Check the device id of AGP bridge to distinguish
	   UP1500 from UP1000/1100. Note: 'pin' is 2 due to bridge swizzle. */
	if (slot == 1 && pin == 2 &&
	    dev->bus->self && dev->bus->self->device == 0x700f)
		return 5;
	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
	return irq;
}

void
nautilus_kill_arch(int mode)
{
	struct pci_bus *bus = pci_isa_hose->bus;
	u32 pmuport;
	int off;

	switch (mode) {
	case LINUX_REBOOT_CMD_RESTART:
		if (! alpha_using_srm) {
			u8 t8;
			pci_bus_read_config_byte(bus, 0x38, 0x43, &t8);
			pci_bus_write_config_byte(bus, 0x38, 0x43, t8 | 0x80);
			outb(1, 0x92);
			outb(0, 0x92);
			/* NOTREACHED */
		}
		break;

	case LINUX_REBOOT_CMD_POWER_OFF:
		/* Assume M1543C */
		off = 0x2000;		/* SLP_TYPE = 0, SLP_EN = 1 */
		pci_bus_read_config_dword(bus, 0x88, 0x10, &pmuport);
		if (!pmuport) {
			/* M1535D/D+ */
			off = 0x3400;	/* SLP_TYPE = 5, SLP_EN = 1 */
			pci_bus_read_config_dword(bus, 0x88, 0xe0, &pmuport);
		}
		pmuport &= 0xfffe;
		outw(0xffff, pmuport);	/* Clear pending events. */
		outw(off, pmuport + 4);
		/* NOTREACHED */
		break;
	}
}

/* Perform analysis of a machine check that arrived from the system (NMI) */

static void
naut_sys_machine_check(unsigned long vector, unsigned long la_ptr,
		       struct pt_regs *regs)
{
	printk("PC %lx RA %lx\n", regs->pc, regs->r26);
	irongate_pci_clr_err();
}

/* Machine checks can come from two sources - those on the CPU and those
   in the system.  They are analysed separately but all starts here.  */

void
nautilus_machine_check(unsigned long vector, unsigned long la_ptr)
{
	char *mchk_class;

	/* Now for some analysis.  Machine checks fall into two classes --
	   those picked up by the system, and those picked up by the CPU.
	   Add to that the two levels of severity - correctable or not.  */

	if (vector == SCB_Q_SYSMCHK
	    && ((IRONGATE0->dramms & 0x300) == 0x300)) {
		unsigned long nmi_ctl;

		/* Clear ALI NMI */
		nmi_ctl = inb(0x61);
		nmi_ctl |= 0x0c;
		outb(nmi_ctl, 0x61);
		nmi_ctl &= ~0x0c;
		outb(nmi_ctl, 0x61);

		/* Write again clears error bits.  */
		IRONGATE0->stat_cmd = IRONGATE0->stat_cmd & ~0x100;
		mb();
		IRONGATE0->stat_cmd;

		/* Write again clears error bits.  */
		IRONGATE0->dramms = IRONGATE0->dramms;
		mb();
		IRONGATE0->dramms;

		draina();
		wrmces(0x7);
		mb();
		return;
	}

	if (vector == SCB_Q_SYSERR)
		mchk_class = "Correctable";
	else if (vector == SCB_Q_SYSMCHK)
		mchk_class = "Fatal";
	else {
		ev6_machine_check(vector, la_ptr);
		return;
	}

	printk(KERN_CRIT "NAUTILUS Machine check 0x%lx "
			 "[%s System Machine Check (NMI)]\n",
	       vector, mchk_class);

	naut_sys_machine_check(vector, la_ptr, get_irq_regs());

	/* Tell the PALcode to clear the machine check */
	draina();
	wrmces(0x7);
	mb();
}

extern void pcibios_claim_one_bus(struct pci_bus *);

static struct resource irongate_io = {
	.name	= "Irongate PCI IO",
	.flags	= IORESOURCE_IO,
};
static struct resource irongate_mem = {
	.name	= "Irongate PCI MEM",
	.flags	= IORESOURCE_MEM,
};
static struct resource busn_resource = {
	.name	= "PCI busn",
	.start	= 0,
	.end	= 255,
	.flags	= IORESOURCE_BUS,
};

void __init
nautilus_init_pci(void)
{
	struct pci_controller *hose = hose_head;
	struct pci_host_bridge *bridge;
	struct pci_bus *bus;
	struct pci_dev *irongate;
	unsigned long bus_align, bus_size, pci_mem;
	unsigned long memtop = max_low_pfn << PAGE_SHIFT;
	int ret;

	bridge = pci_alloc_host_bridge(0);
	if (!bridge)
		return;

	pci_add_resource(&bridge->windows, &ioport_resource);
	pci_add_resource(&bridge->windows, &iomem_resource);
	pci_add_resource(&bridge->windows, &busn_resource);
	bridge->dev.parent = NULL;
	bridge->sysdata = hose;
	bridge->busnr = 0;
	bridge->ops = alpha_mv.pci_ops;
	bridge->swizzle_irq = alpha_mv.pci_swizzle;
	bridge->map_irq = alpha_mv.pci_map_irq;

	/* Scan our single hose.  */
	ret = pci_scan_root_bus_bridge(bridge);
	if (ret) {
		pci_free_host_bridge(bridge);
		return;
	}

	bus = hose->bus = bridge->bus;
	pcibios_claim_one_bus(bus);

	irongate = pci_get_domain_bus_and_slot(pci_domain_nr(bus), 0, 0);
	bus->self = irongate;
	bus->resource[0] = &irongate_io;
	bus->resource[1] = &irongate_mem;

	pci_bus_size_bridges(bus);

	/* IO port range. */
	bus->resource[0]->start = 0;
	bus->resource[0]->end = 0xffff;

	/* Set up PCI memory range - limit is hardwired to 0xffffffff,
	   base must be at aligned to 16Mb. */
	bus_align = bus->resource[1]->start;
	bus_size = bus->resource[1]->end + 1 - bus_align;
	if (bus_align < 0x1000000UL)
		bus_align = 0x1000000UL;

	pci_mem = (0x100000000UL - bus_size) & -bus_align;

	bus->resource[1]->start = pci_mem;
	bus->resource[1]->end = 0xffffffffUL;
	if (request_resource(&iomem_resource, bus->resource[1]) < 0)
		printk(KERN_ERR "Failed to request MEM on hose 0\n");

	if (pci_mem < memtop)
		memtop = pci_mem;
	if (memtop > alpha_mv.min_mem_address) {
		free_reserved_area(__va(alpha_mv.min_mem_address),
				   __va(memtop), -1, NULL);
		printk("nautilus_init_pci: %ldk freed\n",
			(memtop - alpha_mv.min_mem_address) >> 10);
	}

	if ((IRONGATE0->dev_vendor >> 16) > 0x7006)	/* Albacore? */
		IRONGATE0->pci_mem = pci_mem;

	pci_bus_assign_resources(bus);

	/* pci_common_swizzle() relies on bus->self being NULL
	   for the root bus, so just clear it. */
	bus->self = NULL;
	pci_bus_add_devices(bus);
}

/*
 * The System Vectors
 */

struct alpha_machine_vector nautilus_mv __initmv = {
	.vector_name		= "Nautilus",
	DO_EV6_MMU,
	DO_DEFAULT_RTC,
	DO_IRONGATE_IO,
	.machine_check		= nautilus_machine_check,
	.max_isa_dma_address	= ALPHA_MAX_ISA_DMA_ADDRESS,
	.min_io_address		= DEFAULT_IO_BASE,
	.min_mem_address	= IRONGATE_DEFAULT_MEM_BASE,

	.nr_irqs		= 16,
	.device_interrupt	= isa_device_interrupt,

	.init_arch		= irongate_init_arch,
	.init_irq		= nautilus_init_irq,
	.init_rtc		= common_init_rtc,
	.init_pci		= nautilus_init_pci,
	.kill_arch		= nautilus_kill_arch,
	.pci_map_irq		= nautilus_map_irq,
	.pci_swizzle		= common_swizzle,
};
ALIAS_MV(nautilus)
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/arch/alpha/kernel/sys_nautilus.c
	4	*
	5	* Copyright (C) 1995 David A Rusling
	6	* Copyright (C) 1998 Richard Henderson
	7	* Copyright (C) 1999 Alpha Processor, Inc.,
	8	* (David Daniel, Stig Telfer, Soohoon Lee)
	9	*
	10	* Code supporting NAUTILUS systems.
	11	*
	12	*
	13	* NAUTILUS has the following I/O features:
	14	*
	15	* a) Driven by AMD 751 aka IRONGATE (northbridge):
	16	* 4 PCI slots
	17	* 1 AGP slot
	18	*
	19	* b) Driven by ALI M1543C (southbridge)
	20	* 2 ISA slots
	21	* 2 IDE connectors
	22	* 1 dual drive capable FDD controller
	23	* 2 serial ports
	24	* 1 ECP/EPP/SP parallel port
	25	* 2 USB ports
	26	*/
	27
	28	#include <linux/kernel.h>
	29	#include <linux/types.h>
	30	#include <linux/mm.h>
	31	#include <linux/sched.h>
	32	#include <linux/pci.h>
	33	#include <linux/init.h>
	34	#include <linux/reboot.h>
57c8a661	35	#include <linux/memblock.h>
1da177e4 LT	36	#include <linux/bitops.h>
	37
	38	#include <asm/ptrace.h>
1da177e4 LT	39	#include <asm/dma.h>
	40	#include <asm/irq.h>
	41	#include <asm/mmu_context.h>
	42	#include <asm/io.h>
1da177e4 LT	43	#include <asm/pgtable.h>
	44	#include <asm/core_irongate.h>
	45	#include <asm/hwrpb.h>
	46	#include <asm/tlbflush.h>
	47
	48	#include "proto.h"
	49	#include "err_impl.h"
	50	#include "irq_impl.h"
	51	#include "pci_impl.h"
	52	#include "machvec_impl.h"
	53
	54
	55	static void __init
	56	nautilus_init_irq(void)
	57	{
	58	if (alpha_using_srm) {
	59	alpha_mv.device_interrupt = srm_device_interrupt;
	60	}
	61
	62	init_i8259a_irqs();
	63	common_init_isa_dma();
	64	}
	65
814eae59	66	static int
d5341942	67	nautilus_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
1da177e4 LT	68	{
	69	/* Preserve the IRQ set up by the console. */
	70
	71	u8 irq;
7fc1a1ab IK	72	/* UP1500: AGP INTA is actually routed to IRQ 5, not IRQ 10 as
	73	console reports. Check the device id of AGP bridge to distinguish
	74	UP1500 from UP1000/1100. Note: 'pin' is 2 due to bridge swizzle. */
	75	if (slot == 1 && pin == 2 &&
	76	dev->bus->self && dev->bus->self->device == 0x700f)
	77	return 5;
1da177e4 LT	78	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
	79	return irq;
	80	}
	81
	82	void
	83	nautilus_kill_arch(int mode)
	84	{
	85	struct pci_bus *bus = pci_isa_hose->bus;
	86	u32 pmuport;
	87	int off;
	88
	89	switch (mode) {
	90	case LINUX_REBOOT_CMD_RESTART:
	91	if (! alpha_using_srm) {
	92	u8 t8;
	93	pci_bus_read_config_byte(bus, 0x38, 0x43, &t8);
	94	pci_bus_write_config_byte(bus, 0x38, 0x43, t8 \| 0x80);
	95	outb(1, 0x92);
	96	outb(0, 0x92);
	97	/* NOTREACHED */
	98	}
	99	break;
	100
	101	case LINUX_REBOOT_CMD_POWER_OFF:
	102	/* Assume M1543C */
	103	off = 0x2000; /* SLP_TYPE = 0, SLP_EN = 1 */
	104	pci_bus_read_config_dword(bus, 0x88, 0x10, &pmuport);
	105	if (!pmuport) {
	106	/* M1535D/D+ */
	107	off = 0x3400; /* SLP_TYPE = 5, SLP_EN = 1 */
	108	pci_bus_read_config_dword(bus, 0x88, 0xe0, &pmuport);
	109	}
	110	pmuport &= 0xfffe;
	111	outw(0xffff, pmuport); /* Clear pending events. */
	112	outw(off, pmuport + 4);
	113	/* NOTREACHED */
	114	break;
	115	}
	116	}
	117
	118	/* Perform analysis of a machine check that arrived from the system (NMI) */
	119
	120	static void
	121	naut_sys_machine_check(unsigned long vector, unsigned long la_ptr,
	122	struct pt_regs *regs)
	123	{
	124	printk("PC %lx RA %lx\n", regs->pc, regs->r26);
	125	irongate_pci_clr_err();
	126	}
	127
	128	/* Machine checks can come from two sources - those on the CPU and those
	129	in the system. They are analysed separately but all starts here. */
	130
	131	void
4fa1970a	132	nautilus_machine_check(unsigned long vector, unsigned long la_ptr)
1da177e4 LT	133	{
	134	char *mchk_class;
	135
	136	/* Now for some analysis. Machine checks fall into two classes --
	137	those picked up by the system, and those picked up by the CPU.
	138	Add to that the two levels of severity - correctable or not. */
	139
	140	if (vector == SCB_Q_SYSMCHK
	141	&& ((IRONGATE0->dramms & 0x300) == 0x300)) {
	142	unsigned long nmi_ctl;
	143
	144	/* Clear ALI NMI */
	145	nmi_ctl = inb(0x61);
	146	nmi_ctl \|= 0x0c;
	147	outb(nmi_ctl, 0x61);
	148	nmi_ctl &= ~0x0c;
	149	outb(nmi_ctl, 0x61);
	150
	151	/* Write again clears error bits. */
	152	IRONGATE0->stat_cmd = IRONGATE0->stat_cmd & ~0x100;
	153	mb();
	154	IRONGATE0->stat_cmd;
	155
	156	/* Write again clears error bits. */
	157	IRONGATE0->dramms = IRONGATE0->dramms;
	158	mb();
	159	IRONGATE0->dramms;
	160
	161	draina();
	162	wrmces(0x7);
	163	mb();
	164	return;
	165	}
	166
	167	if (vector == SCB_Q_SYSERR)
	168	mchk_class = "Correctable";
	169	else if (vector == SCB_Q_SYSMCHK)
	170	mchk_class = "Fatal";
	171	else {
4fa1970a	172	ev6_machine_check(vector, la_ptr);
1da177e4 LT	173	return;
	174	}
	175
	176	printk(KERN_CRIT "NAUTILUS Machine check 0x%lx "
	177	"[%s System Machine Check (NMI)]\n",
	178	vector, mchk_class);
	179
4fa1970a	180	naut_sys_machine_check(vector, la_ptr, get_irq_regs());
1da177e4 LT	181
	182	/* Tell the PALcode to clear the machine check */
	183	draina();
	184	wrmces(0x7);
	185	mb();
	186	}
	187
72cff123	188	extern void pcibios_claim_one_bus(struct pci_bus *);
1da177e4	189
aa8b4be3 JE	190	static struct resource irongate_io = {
	191	.name = "Irongate PCI IO",
	192	.flags = IORESOURCE_IO,
	193	};
1da177e4 LT	194	static struct resource irongate_mem = {
	195	.name = "Irongate PCI MEM",
	196	.flags = IORESOURCE_MEM,
	197	};
0e4c2eeb LP	198	static struct resource busn_resource = {
	199	.name = "PCI busn",
	200	.start = 0,
	201	.end = 255,
	202	.flags = IORESOURCE_BUS,
	203	};
1da177e4 LT	204
	205	void __init
	206	nautilus_init_pci(void)
	207	{
	208	struct pci_controller *hose = hose_head;
0e4c2eeb	209	struct pci_host_bridge *bridge;
1da177e4 LT	210	struct pci_bus *bus;
	211	struct pci_dev *irongate;
	212	unsigned long bus_align, bus_size, pci_mem;
	213	unsigned long memtop = max_low_pfn << PAGE_SHIFT;
0e4c2eeb LP	214	int ret;
	215
	216	bridge = pci_alloc_host_bridge(0);
	217	if (!bridge)
	218	return;
	219
	220	pci_add_resource(&bridge->windows, &ioport_resource);
	221	pci_add_resource(&bridge->windows, &iomem_resource);
	222	pci_add_resource(&bridge->windows, &busn_resource);
	223	bridge->dev.parent = NULL;
	224	bridge->sysdata = hose;
	225	bridge->busnr = 0;
	226	bridge->ops = alpha_mv.pci_ops;
	227	bridge->swizzle_irq = alpha_mv.pci_swizzle;
	228	bridge->map_irq = alpha_mv.pci_map_irq;
1da177e4 LT	229
1da177e4 LT	230	/* Scan our single hose. */
0e4c2eeb LP	231	ret = pci_scan_root_bus_bridge(bridge);
	232	if (ret) {
	233	pci_free_host_bridge(bridge);
c90570d9	234	return;
0e4c2eeb	235	}
c90570d9	236
0e4c2eeb	237	bus = hose->bus = bridge->bus;
72cff123	238	pcibios_claim_one_bus(bus);
1da177e4	239
797cfc4f	240	irongate = pci_get_domain_bus_and_slot(pci_domain_nr(bus), 0, 0);
1da177e4	241	bus->self = irongate;
aa8b4be3	242	bus->resource[0] = &irongate_io;
1da177e4 LT	243	bus->resource[1] = &irongate_mem;
	244
	245	pci_bus_size_bridges(bus);
	246
	247	/* IO port range. */
	248	bus->resource[0]->start = 0;
	249	bus->resource[0]->end = 0xffff;
	250
	251	/* Set up PCI memory range - limit is hardwired to 0xffffffff,
	252	base must be at aligned to 16Mb. */
	253	bus_align = bus->resource[1]->start;
	254	bus_size = bus->resource[1]->end + 1 - bus_align;
	255	if (bus_align < 0x1000000UL)
	256	bus_align = 0x1000000UL;
	257
	258	pci_mem = (0x100000000UL - bus_size) & -bus_align;
	259
	260	bus->resource[1]->start = pci_mem;
	261	bus->resource[1]->end = 0xffffffffUL;
	262	if (request_resource(&iomem_resource, bus->resource[1]) < 0)
	263	printk(KERN_ERR "Failed to request MEM on hose 0\n");
	264
	265	if (pci_mem < memtop)
	266	memtop = pci_mem;
	267	if (memtop > alpha_mv.min_mem_address) {
11199692	268	free_reserved_area(__va(alpha_mv.min_mem_address),
dbe67df4	269	__va(memtop), -1, NULL);
1da177e4 LT	270	printk("nautilus_init_pci: %ldk freed\n",
	271	(memtop - alpha_mv.min_mem_address) >> 10);
	272	}
	273
	274	if ((IRONGATE0->dev_vendor >> 16) > 0x7006) /* Albacore? */
	275	IRONGATE0->pci_mem = pci_mem;
	276
	277	pci_bus_assign_resources(bus);
2f88d151 IK	278
	279	/* pci_common_swizzle() relies on bus->self being NULL
	280	for the root bus, so just clear it. */
	281	bus->self = NULL;
c90570d9	282	pci_bus_add_devices(bus);
1da177e4 LT	283	}
	284
	285	/*
	286	* The System Vectors
	287	*/
	288
	289	struct alpha_machine_vector nautilus_mv __initmv = {
	290	.vector_name = "Nautilus",
	291	DO_EV6_MMU,
	292	DO_DEFAULT_RTC,
	293	DO_IRONGATE_IO,
	294	.machine_check = nautilus_machine_check,
	295	.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
	296	.min_io_address = DEFAULT_IO_BASE,
	297	.min_mem_address = IRONGATE_DEFAULT_MEM_BASE,
	298
	299	.nr_irqs = 16,
	300	.device_interrupt = isa_device_interrupt,
	301
	302	.init_arch = irongate_init_arch,
	303	.init_irq = nautilus_init_irq,
	304	.init_rtc = common_init_rtc,
	305	.init_pci = nautilus_init_pci,
	306	.kill_arch = nautilus_kill_arch,
	307	.pci_map_irq = nautilus_map_irq,
	308	.pci_swizzle = common_swizzle,
	309	};
	310	ALIAS_MV(nautilus)