[mirror_ubuntu-bionic-kernel.git] / arch / mips / sgi-ip27 / ip27-init.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 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
 */
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/cpumask.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/time.h>
#include <asm/sn/types.h>
#include <asm/sn/sn0/addrs.h>
#include <asm/sn/sn0/hubni.h>
#include <asm/sn/sn0/hubio.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/ioc3.h>
#include <asm/mipsregs.h>
#include <asm/sn/gda.h>
#include <asm/sn/hub.h>
#include <asm/sn/intr.h>
#include <asm/current.h>
#include <asm/smp.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/thread_info.h>
#include <asm/sn/launch.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/sn0/ip27.h>
#include <asm/sn/mapped_kernel.h>

#define CPU_NONE		(cpuid_t)-1

static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
nasid_t master_nasid = INVALID_NASID;

cnodeid_t	nasid_to_compact_node[MAX_NASIDS];
nasid_t		compact_to_nasid_node[MAX_COMPACT_NODES];
cnodeid_t	cpuid_to_compact_node[MAXCPUS];

EXPORT_SYMBOL(nasid_to_compact_node);

extern void pcibr_setup(cnodeid_t);

extern void xtalk_probe_node(cnodeid_t nid);

static void __init per_hub_init(cnodeid_t cnode)
{
	struct hub_data *hub = hub_data(cnode);
	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
	int i;

	cpu_set(smp_processor_id(), hub->h_cpus);

	if (test_and_set_bit(cnode, hub_init_mask))
		return;
	/*
	 * Set CRB timeout at 5ms, (< PI timeout of 10ms)
	 */
	REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
	REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);

	hub_rtc_init(cnode);
	xtalk_probe_node(cnode);

#ifdef CONFIG_REPLICATE_EXHANDLERS
	/*
	 * If this is not a headless node initialization,
	 * copy over the caliased exception handlers.
	 */
	if (get_compact_nodeid() == cnode) {
		extern char except_vec2_generic, except_vec3_generic;
		extern void build_tlb_refill_handler(void);

		memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
		memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
		build_tlb_refill_handler();
		memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
		memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
		__flush_cache_all();
	}
#endif

	/*
	 * Some interrupts are reserved by hardware or by software convention.
	 * Mark these as reserved right away so they won't be used accidently
	 * later.
	 */
	for (i = 0; i <= BASE_PCI_IRQ; i++) {
		__set_bit(i, hub->irq_alloc_mask);
		LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
	}

	__set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
	LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);

	for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
		__set_bit(i, hub->irq_alloc_mask);
		LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
	}
}

void __init per_cpu_init(void)
{
	int cpu = smp_processor_id();
	int slice = LOCAL_HUB_L(PI_CPU_NUM);
	cnodeid_t cnode = get_compact_nodeid();
	struct hub_data *hub = hub_data(cnode);
	struct slice_data *si = hub->slice + slice;
	int i;

	if (test_and_set_bit(slice, &hub->slice_map))
		return;

	clear_c0_status(ST0_IM);

	per_hub_init(cnode);

	for (i = 0; i < LEVELS_PER_SLICE; i++)
		si->level_to_irq[i] = -1;

	/*
	 * We use this so we can find the local hub's data as fast as only
	 * possible.
	 */
	cpu_data[cpu].data = si;

	cpu_time_init();
	install_ipi();

	/* Install our NMI handler if symmon hasn't installed one. */
	install_cpu_nmi_handler(cputoslice(cpu));

	set_c0_status(SRB_DEV0 | SRB_DEV1);
}

/*
 * get_nasid() returns the physical node id number of the caller.
 */
nasid_t
get_nasid(void)
{
	return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
	                 >> NSRI_NODEID_SHFT);
}

/*
 * Map the physical node id to a virtual node id (virtual node ids are contiguous).
 */
cnodeid_t get_compact_nodeid(void)
{
	return NASID_TO_COMPACT_NODEID(get_nasid());
}

/* Extracted from the IOC3 meta driver.  FIXME.  */
static inline void ioc3_sio_init(void)
{
	struct ioc3 *ioc3;
	nasid_t nid;
	long loops;

	nid = get_nasid();
	ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;

	ioc3->sscr_a = 0;			/* PIO mode for uarta.  */
	ioc3->sscr_b = 0;			/* PIO mode for uartb.  */
	ioc3->sio_iec = ~0;
	ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT);

	loops=1000000; while(loops--);
	ioc3->sregs.uarta.iu_fcr = 0;
	ioc3->sregs.uartb.iu_fcr = 0;
	loops=1000000; while(loops--);
}

static inline void ioc3_eth_init(void)
{
	struct ioc3 *ioc3;
	nasid_t nid;

	nid = get_nasid();
	ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;

	ioc3->eier = 0;
}

extern void ip27_setup_console(void);
extern void ip27_time_init(void);
extern void ip27_reboot_setup(void);

void __init plat_setup(void)
{
	hubreg_t p, e, n_mode;
	nasid_t nid;

	ip27_setup_console();
	ip27_reboot_setup();

	/*
	 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
	 */
	nid = get_nasid();
	printk("IP27: Running on node %d.\n", nid);

	p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
	e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
	printk("Node %d has %s primary CPU%s.\n", nid,
	       p ? "a" : "no",
	       e ? ", CPU is running" : "");

	p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
	e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
	printk("Node %d has %s secondary CPU%s.\n", nid,
	       p ? "a" : "no",
	       e ? ", CPU is running" : "");

	/*
	 * Try to catch kernel missconfigurations and give user an
	 * indication what option to select.
	 */
	n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
	printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
#ifdef CONFIG_SGI_SN_N_MODE
	if (!n_mode)
		panic("Kernel compiled for M mode.");
#else
	if (n_mode)
		panic("Kernel compiled for N mode.");
#endif

	ioc3_sio_init();
	ioc3_eth_init();
	per_cpu_init();

	set_io_port_base(IO_BASE);

	board_time_init = ip27_time_init;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General
	3	* Public License. See the file "COPYING" in the main directory of this
	4	* archive for more details.
	5	*
	6	* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
	7	* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
	8	*/
	9	#include <linux/config.h>
	10	#include <linux/kernel.h>
	11	#include <linux/init.h>
	12	#include <linux/sched.h>
	13	#include <linux/mm.h>
	14	#include <linux/module.h>
	15	#include <linux/cpumask.h>
	16	#include <asm/cpu.h>
	17	#include <asm/io.h>
	18	#include <asm/pgtable.h>
	19	#include <asm/time.h>
	20	#include <asm/sn/types.h>
	21	#include <asm/sn/sn0/addrs.h>
	22	#include <asm/sn/sn0/hubni.h>
	23	#include <asm/sn/sn0/hubio.h>
	24	#include <asm/sn/klconfig.h>
	25	#include <asm/sn/ioc3.h>
	26	#include <asm/mipsregs.h>
	27	#include <asm/sn/gda.h>
	28	#include <asm/sn/hub.h>
	29	#include <asm/sn/intr.h>
	30	#include <asm/current.h>
	31	#include <asm/smp.h>
	32	#include <asm/processor.h>
	33	#include <asm/mmu_context.h>
	34	#include <asm/thread_info.h>
	35	#include <asm/sn/launch.h>
	36	#include <asm/sn/sn_private.h>
	37	#include <asm/sn/sn0/ip27.h>
	38	#include <asm/sn/mapped_kernel.h>
	39
	40	#define CPU_NONE (cpuid_t)-1
	41
	42	static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
	43	nasid_t master_nasid = INVALID_NASID;
	44
	45	cnodeid_t nasid_to_compact_node[MAX_NASIDS];
	46	nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
	47	cnodeid_t cpuid_to_compact_node[MAXCPUS];
	48
	49	EXPORT_SYMBOL(nasid_to_compact_node);
	50
	51	extern void pcibr_setup(cnodeid_t);
	52
	53	extern void xtalk_probe_node(cnodeid_t nid);
	54
	55	static void __init per_hub_init(cnodeid_t cnode)
	56	{
	57	struct hub_data *hub = hub_data(cnode);
	58	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
4f12bfe5	59	int i;
1da177e4 LT	60
	61	cpu_set(smp_processor_id(), hub->h_cpus);
	62
	63	if (test_and_set_bit(cnode, hub_init_mask))
	64	return;
1da177e4 LT	65	/*
	66	* Set CRB timeout at 5ms, (< PI timeout of 10ms)
	67	*/
	68	REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
	69	REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
	70
	71	hub_rtc_init(cnode);
	72	xtalk_probe_node(cnode);
	73
	74	#ifdef CONFIG_REPLICATE_EXHANDLERS
	75	/*
	76	* If this is not a headless node initialization,
	77	* copy over the caliased exception handlers.
	78	*/
	79	if (get_compact_nodeid() == cnode) {
	80	extern char except_vec2_generic, except_vec3_generic;
	81	extern void build_tlb_refill_handler(void);
	82
	83	memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
	84	memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
	85	build_tlb_refill_handler();
	86	memcpy((void )(CKSEG0 + 0x100), (void ) CKSEG0, 0x80);
	87	memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
	88	__flush_cache_all();
	89	}
	90	#endif
4f12bfe5 RB	91
	92	/*
	93	* Some interrupts are reserved by hardware or by software convention.
	94	* Mark these as reserved right away so they won't be used accidently
	95	* later.
	96	*/
	97	for (i = 0; i <= BASE_PCI_IRQ; i++) {
	98	__set_bit(i, hub->irq_alloc_mask);
	99	LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
	100	}
	101
	102	__set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
	103	LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
	104
	105	for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
	106	__set_bit(i, hub->irq_alloc_mask);
	107	LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
	108	}
1da177e4 LT	109	}
	110
	111	void __init per_cpu_init(void)
	112	{
	113	int cpu = smp_processor_id();
	114	int slice = LOCAL_HUB_L(PI_CPU_NUM);
	115	cnodeid_t cnode = get_compact_nodeid();
	116	struct hub_data *hub = hub_data(cnode);
	117	struct slice_data *si = hub->slice + slice;
	118	int i;
	119
	120	if (test_and_set_bit(slice, &hub->slice_map))
	121	return;
	122
	123	clear_c0_status(ST0_IM);
	124
4f12bfe5 RB	125	per_hub_init(cnode);
4f12bfe5 RB	126
1da177e4 LT	127	for (i = 0; i < LEVELS_PER_SLICE; i++)
	128	si->level_to_irq[i] = -1;
	129
1da177e4 LT	130	/*
	131	* We use this so we can find the local hub's data as fast as only
	132	* possible.
	133	*/
	134	cpu_data[cpu].data = si;
	135
	136	cpu_time_init();
	137	install_ipi();
	138
	139	/* Install our NMI handler if symmon hasn't installed one. */
	140	install_cpu_nmi_handler(cputoslice(cpu));
	141
	142	set_c0_status(SRB_DEV0 \| SRB_DEV1);
1da177e4 LT	143	}
	144
	145	/*
	146	* get_nasid() returns the physical node id number of the caller.
	147	*/
	148	nasid_t
	149	get_nasid(void)
	150	{
	151	return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
	152	>> NSRI_NODEID_SHFT);
	153	}
	154
	155	/*
	156	* Map the physical node id to a virtual node id (virtual node ids are contiguous).
	157	*/
	158	cnodeid_t get_compact_nodeid(void)
	159	{
	160	return NASID_TO_COMPACT_NODEID(get_nasid());
	161	}
	162
	163	/* Extracted from the IOC3 meta driver. FIXME. */
	164	static inline void ioc3_sio_init(void)
	165	{
	166	struct ioc3 *ioc3;
	167	nasid_t nid;
	168	long loops;
	169
	170	nid = get_nasid();
	171	ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
	172
	173	ioc3->sscr_a = 0; /* PIO mode for uarta. */
	174	ioc3->sscr_b = 0; /* PIO mode for uartb. */
	175	ioc3->sio_iec = ~0;
	176	ioc3->sio_ies = (SIO_IR_SA_INT \| SIO_IR_SB_INT);
	177
	178	loops=1000000; while(loops--);
	179	ioc3->sregs.uarta.iu_fcr = 0;
	180	ioc3->sregs.uartb.iu_fcr = 0;
	181	loops=1000000; while(loops--);
	182	}
	183
	184	static inline void ioc3_eth_init(void)
	185	{
	186	struct ioc3 *ioc3;
	187	nasid_t nid;
	188
	189	nid = get_nasid();
	190	ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
	191
	192	ioc3->eier = 0;
	193	}
	194
	195	extern void ip27_setup_console(void);
	196	extern void ip27_time_init(void);
	197	extern void ip27_reboot_setup(void);
	198
c83cfc9c	199	void __init plat_setup(void)
1da177e4 LT	200	{
	201	hubreg_t p, e, n_mode;
	202	nasid_t nid;
	203
	204	ip27_setup_console();
	205	ip27_reboot_setup();
	206
	207	/*
	208	* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
	209	*/
	210	nid = get_nasid();
	211	printk("IP27: Running on node %d.\n", nid);
	212
	213	p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
	214	e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
	215	printk("Node %d has %s primary CPU%s.\n", nid,
	216	p ? "a" : "no",
	217	e ? ", CPU is running" : "");
	218
	219	p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
	220	e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
	221	printk("Node %d has %s secondary CPU%s.\n", nid,
	222	p ? "a" : "no",
	223	e ? ", CPU is running" : "");
	224
	225	/*
	226	* Try to catch kernel missconfigurations and give user an
	227	* indication what option to select.
	228	*/
	229	n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
	230	printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
aa9772e3	231	#ifdef CONFIG_SGI_SN_N_MODE
1da177e4 LT	232	if (!n_mode)
	233	panic("Kernel compiled for M mode.");
	234	#else
	235	if (n_mode)
	236	panic("Kernel compiled for N mode.");
	237	#endif
	238
	239	ioc3_sio_init();
	240	ioc3_eth_init();
	241	per_cpu_init();
	242
	243	set_io_port_base(IO_BASE);
	244
	245	board_time_init = ip27_time_init;
1da177e4	246	}