patch-2.4.19 linux-2.4.19/arch/ia64/sn/kernel/setup.c

• Lines: 416
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ia64/sn/kernel/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ia64/sn/kernel/setup.c linux-2.4.19/arch/ia64/sn/kernel/setup.c
@@ -0,0 +1,415 @@
+/*
+ * Copyright (C) 1999,2001-2002 Silicon Graphics, Inc. All rights reserved.
+ * 
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of version 2 of the GNU General Public License 
+ * as published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it would be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
+ * 
+ * Further, this software is distributed without any warranty that it is 
+ * free of the rightful claim of any third person regarding infringement 
+ * or the like.  Any license provided herein, whether implied or 
+ * otherwise, applies only to this software file.  Patent licenses, if 
+ * any, provided herein do not apply to combinations of this program with 
+ * other software, or any other product whatsoever.
+ * 
+ * You should have received a copy of the GNU General Public 
+ * License along with this program; if not, write the Free Software 
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ * 
+ * Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 
+ * Mountain View, CA  94043, or:
+ * 
+ * http://www.sgi.com 
+ * 
+ * For further information regarding this notice, see: 
+ * 
+ * http://oss.sgi.com/projects/GenInfo/NoticeExplan
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/kdev_t.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/timex.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/serial.h>
+#include <linux/irq.h>
+#include <linux/bootmem.h>
+#include <linux/mmzone.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <asm/sal.h>
+#include <asm/machvec.h>
+#include <asm/system.h>
+#ifdef CONFIG_IA64_MCA
+#include <asm/acpi-ext.h>
+#endif
+#include <asm/processor.h>
+#include <asm/sn/sgi.h>
+#include <asm/sn/io.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pda.h>
+#include <asm/sn/nodepda.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/sn_private.h>
+#include <asm/sn/simulator.h>
+#include <asm/sn/leds.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/clksupport.h>
+
+#ifdef CONFIG_IA64_SGI_SN2
+#include <asm/sn/sn2/shub.h>
+#endif
+
+extern void bte_init_node (nodepda_t *, cnodeid_t, char **);
+extern void bte_init_cpu (void);
+
+long sn_rtc_cycles_per_second;   
+
+/*
+ * This is the address of the RRegs in the HSpace of the global
+ * master.  It is used by a hack in serial.c (serial_[in|out],
+ * printk.c (early_printk), and kdb_io.c to put console output on that
+ * node's Bedrock UART.  It is initialized here to 0, so that
+ * early_printk won't try to access the UART before
+ * master_node_bedrock_address is properly calculated.
+ */
+u64 master_node_bedrock_address = 0UL;
+
+static void sn_init_pdas(char **);
+
+extern struct irq_desc *_sn_irq_desc[];
+
+#if defined(CONFIG_IA64_SGI_SN1)
+extern synergy_da_t	*Synergy_da_indr[];
+#endif
+
+static nodepda_t	*nodepdaindr[MAX_COMPACT_NODES];
+
+#ifdef CONFIG_IA64_SGI_SN2
+irqpda_t		*irqpdaindr[NR_CPUS];
+#endif /* CONFIG_IA64_SGI_SN2 */
+
+
+/*
+ * The format of "screen_info" is strange, and due to early i386-setup
+ * code. This is just enough to make the console code think we're on a
+ * VGA color display.
+ */
+struct screen_info sn_screen_info = {
+	orig_x:			 0,
+	orig_y:			 0,
+	orig_video_mode:	 3,
+	orig_video_cols:	80,
+	orig_video_ega_bx:	 3,
+	orig_video_lines:	25,
+	orig_video_isVGA:	 1,
+	orig_video_points:	16
+};
+
+/*
+ * This is here so we can use the CMOS detection in ide-probe.c to
+ * determine what drives are present.  In theory, we don't need this
+ * as the auto-detection could be done via ide-probe.c:do_probe() but
+ * in practice that would be much slower, which is painful when
+ * running in the simulator.  Note that passing zeroes in DRIVE_INFO
+ * is sufficient (the IDE driver will autodetect the drive geometry).
+ */
+char drive_info[4*16];
+
+/**
+ * sn_map_nr - return the mem_map entry for a given kernel address
+ * @addr: kernel address to query
+ *
+ * Finds the mem_map entry for the kernel address given.  Used by
+ * virt_to_page() (asm-ia64/page.h), among other things.
+ */
+unsigned long
+sn_map_nr (unsigned long addr)
+{
+	return MAP_NR_DISCONTIG(addr);
+}
+
+/**
+ * early_sn_setup - early setup routine for SN platforms
+ *
+ * Sets up an intial console to aid debugging.  Intended primarily
+ * for bringup, it's only called if %BRINGUP and %CONFIG_IA64_EARLY_PRINTK
+ * are turned on.  See start_kernel() in init/main.c.
+ */
+#if defined(CONFIG_IA64_EARLY_PRINTK) && defined(CONFIG_IA64_SGI_SN)
+void __init
+early_sn_setup(void)
+{
+	if ( IS_RUNNING_ON_SIMULATOR() ) {
+#if defined(CONFIG_IA64_SGI_SN1)
+		master_node_bedrock_address = (u64)REMOTE_HSPEC_ADDR(get_nasid(), 0);
+#else
+		master_node_bedrock_address = (u64)REMOTE_HUB(get_nasid(), SH_JUNK_BUS_UART0);
+#endif
+		printk(KERN_DEBUG "early_sn_setup: setting master_node_bedrock_address to 0x%lx\n", master_node_bedrock_address);
+	}
+}
+#endif /* CONFIG_IA64_EARLY_PRINTK && CONFIG_IA64_SGI_SN */
+
+#ifdef NOT_YET_CONFIG_IA64_MCA
+extern void ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs);
+static struct irqaction mca_cpe_irqaction = { 
+	handler:    ia64_mca_cpe_int_handler,
+	flags:      SA_INTERRUPT,
+	name:       "cpe_hndlr"
+};
+#endif
+#ifdef CONFIG_IA64_MCA
+extern int platform_irq_list[];
+#endif
+
+extern nasid_t master_nasid;
+
+/**
+ * sn_setup - SN platform setup routine
+ * @cmdline_p: kernel command line
+ *
+ * Handles platform setup for SN machines.  This includes determining
+ * the RTC frequency (via a SAL call), initializing secondary CPUs, and
+ * setting up per-node data areas.  The console is also initialized here.
+ */
+void __init
+sn_setup(char **cmdline_p)
+{
+	long status, ticks_per_sec, drift;
+	int i;
+
+	master_nasid = get_nasid();
+	(void)get_console_nasid();
+
+	status = ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec, &drift);
+	if (status != 0 || ticks_per_sec < 100000)
+		printk(KERN_WARNING "unable to determine platform RTC clock frequency\n");
+	else
+		sn_rtc_cycles_per_second = ticks_per_sec;
+		
+	for (i=0;i<NR_CPUS;i++)
+		_sn_irq_desc[i] = _irq_desc;
+
+#ifdef CONFIG_IA64_MCA
+	platform_irq_list[ACPI20_ENTRY_PIS_CPEI] = IA64_PCE_VECTOR;
+#endif
+
+
+	if ( IS_RUNNING_ON_SIMULATOR() )
+	{
+#ifdef CONFIG_IA64_SGI_SN2
+		master_node_bedrock_address = (u64)REMOTE_HUB(get_nasid(), SH_JUNK_BUS_UART0);
+#else
+		master_node_bedrock_address = (u64)REMOTE_HSPEC_ADDR(get_nasid(), 0);
+#endif
+		printk(KERN_DEBUG "sn_setup: setting master_node_bedrock_address to 0x%lx\n",
+		       master_node_bedrock_address);
+	}
+
+	/*
+	 * we set the default root device to /dev/hda
+	 * to make simulation easy
+	 */
+	ROOT_DEV = to_kdev_t(0x0301);
+
+	/*
+	 * Create the PDAs and NODEPDAs for all the cpus.
+	 */
+	sn_init_pdas(cmdline_p);
+
+
+	/* 
+	 * For the bootcpu, we do this here. All other cpus will make the
+	 * call as part of cpu_init in slave cpu initialization.
+	 */
+	sn_cpu_init();
+
+
+#ifdef CONFIG_SMP
+	init_smp_config();
+#endif
+	screen_info = sn_screen_info;
+
+	/*
+	 * Turn off "floating-point assist fault" warnings by default.
+	 */
+	current->thread.flags |= IA64_THREAD_FPEMU_NOPRINT;
+}
+
+/**
+ * sn_init_pdas - setup node data areas
+ *
+ * One time setup for Node Data Area.  Called by sn_setup().
+ */
+void
+sn_init_pdas(char **cmdline_p)
+{
+	cnodeid_t	cnode;
+
+	/*
+	 * Make sure that the PDA fits entirely in the same page as the 
+	 * cpu_data area.
+	 */
+	if ((PDAADDR&~PAGE_MASK)+sizeof(pda_t) > PAGE_SIZE)
+		panic("overflow of cpu_data page");
+
+        /*
+         * Allocate & initalize the nodepda for each node.
+         */
+        for (cnode=0; cnode < numnodes; cnode++) {
+		nodepdaindr[cnode] = alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t));
+		memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
+
+#if defined(CONFIG_IA64_SGI_SN1)
+		Synergy_da_indr[cnode * 2] = (synergy_da_t *) alloc_bootmem_node(NODE_DATA(cnode), sizeof(synergy_da_t));
+		Synergy_da_indr[cnode * 2 + 1] = (synergy_da_t *) alloc_bootmem_node(NODE_DATA(cnode), sizeof(synergy_da_t));
+		memset(Synergy_da_indr[cnode * 2], 0, sizeof(synergy_da_t));
+		memset(Synergy_da_indr[cnode * 2 + 1], 0, sizeof(synergy_da_t));
+#endif
+        }
+
+	/*
+	 * Now copy the array of nodepda pointers to each nodepda.
+	 */
+        for (cnode=0; cnode < numnodes; cnode++)
+		memcpy(nodepdaindr[cnode]->pernode_pdaindr, nodepdaindr, sizeof(nodepdaindr));
+
+
+	/*
+	 * Set up IO related platform-dependent nodepda fields.
+	 * The following routine actually sets up the hubinfo struct
+	 * in nodepda.
+	 */
+	for (cnode = 0; cnode < numnodes; cnode++) {
+		init_platform_nodepda(nodepdaindr[cnode], cnode);
+		bte_init_node (nodepdaindr[cnode], cnode, cmdline_p);
+	}
+}
+
+/**
+ * sn_cpu_init - initialize per-cpu data areas
+ * @cpuid: cpuid of the caller
+ *
+ * Called during cpu initialization on each cpu as it starts.
+ * Currently, initializes the per-cpu data area for SNIA.
+ * Also sets up a few fields in the nodepda.  Also known as
+ * platform_cpu_init() by the ia64 machvec code.
+ */
+void __init
+sn_cpu_init(void)
+{
+	int	cpuid;
+	int	cpuphyid;
+	int	nasid;
+	int	slice;
+	int	cnode;
+
+	/*
+	 * The boot cpu makes this call again after platform initialization is
+	 * complete.
+	 */
+	if (nodepdaindr[0] == NULL)
+		return;
+
+	cpuid = smp_processor_id();
+	cpuphyid = ((ia64_get_lid() >> 16) & 0xffff);
+	nasid = cpu_physical_id_to_nasid(cpuphyid);
+	cnode = nasid_to_cnodeid(nasid);
+	slice = cpu_physical_id_to_slice(cpuphyid);
+
+	pda.p_nodepda = nodepdaindr[cnode];
+	pda.led_address = (long*) (LED0 + (slice<<LED_CPU_SHIFT));
+	pda.led_state = 0;
+	pda.hb_count = HZ/2;
+	pda.hb_state = 0;
+	pda.idle_flag = 0;
+	
+	if (local_node_data->active_cpu_count == 1)
+		nodepda->node_first_cpu = cpuid;
+
+#ifdef CONFIG_IA64_SGI_SN1
+	{
+		int	synergy;
+		synergy = cpu_physical_id_to_synergy(cpuphyid);
+		pda.p_subnodepda = &nodepdaindr[cnode]->snpda[synergy];
+	}
+#endif
+
+#ifdef CONFIG_IA64_SGI_SN2
+
+	/*
+	 * We must use different memory allocators for first cpu (bootmem 
+	 * allocator) than for the other cpus (regular allocator).
+	 */
+	if (cpuid == 0)
+		irqpdaindr[cpuid] = alloc_bootmem_node(NODE_DATA(cpuid_to_cnodeid(cpuid)),sizeof(irqpda_t));
+	else
+		irqpdaindr[cpuid] = page_address(alloc_pages_node(local_cnodeid(), GFP_KERNEL, get_order(sizeof(irqpda_t))));
+	memset(irqpdaindr[cpuid], 0, sizeof(irqpda_t));
+	pda.p_irqpda = irqpdaindr[cpuid];
+	pda.pio_write_status_addr = (volatile unsigned long *)LOCAL_MMR_ADDR((slice < 2 ? SH_PIO_WRITE_STATUS_0 : SH_PIO_WRITE_STATUS_1 ) );
+#endif
+
+#ifdef CONFIG_IA64_SGI_SN1
+	pda.bedrock_rev_id = (volatile unsigned long *) LOCAL_HUB(LB_REV_ID);
+	if (cpuid_to_synergy(cpuid))
+		/* CPU B */
+		pda.pio_write_status_addr = (volatile unsigned long *) GBL_PERF_B_ADDR;
+	else
+		/* CPU A */
+		pda.pio_write_status_addr = (volatile unsigned long *) GBL_PERF_A_ADDR;
+#endif
+
+
+	bte_init_cpu();
+}
+
+
+/**
+ * cnodeid_to_cpuid - convert a cnode to a cpuid of a cpu on the node.
+ * @cnode: node to get a cpuid from
+ *	
+ * Returns -1 if no cpus exist on the node.
+ * NOTE:BRINGUP ZZZ This is NOT a good way to find cpus on the node.
+ * Need a better way!!
+ */
+int
+cnodeid_to_cpuid(int cnode) {
+	int cpu;
+
+	for (cpu = 0; cpu < smp_num_cpus; cpu++)
+		if (cpuid_to_cnodeid(cpu) == cnode)
+			break;
+
+	if (cpu == smp_num_cpus) 
+		cpu = -1;
+
+	return cpu;
+}
+
+#if 0 /* ##jh */
+/**
+ * get_cycles - return a non-decreasing timestamp
+ *
+ * On SN, we use an RTC read for this function
+ */
+cycles_t
+get_cycles (void)
+{
+	return GET_RTC_COUNTER();
+}
+#endif