setup.c
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上传日期:2013-04-10
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- /*
- * 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%lxn", 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 frequencyn");
- 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%lxn",
- 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