Initial import

1 files changed, 221 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
new file mode 100644
index 000000000..570098bfd
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -0,0 +1,221 @@
+/*
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/smp.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/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);
+
+struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
+EXPORT_SYMBOL_GPL(sn_cpu_info);
+
+extern void pcibr_setup(cnodeid_t);
+
+extern void xtalk_probe_node(cnodeid_t nid);
+
+static void per_hub_init(cnodeid_t cnode)
+{
+	struct hub_data *hub = hub_data(cnode);
+	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
+	int i;
+
+	cpumask_set_cpu(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 accidentally
+	 * 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 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());
+}
+
+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_reboot_setup(void);
+
+void __init plat_mem_setup(void)
+{
+	hubreg_t p, e, n_mode;
+	nasid_t nid;
+
+	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_eth_init();
+	per_cpu_init();
+
+	set_io_port_base(IO_BASE);
+}