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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ia64/sn/kernel/setup.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/ia64/sn/kernel/setup.c')
-rw-r--r-- | arch/ia64/sn/kernel/setup.c | 621 |
1 files changed, 621 insertions, 0 deletions
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c new file mode 100644 index 0000000..f0306b5 --- /dev/null +++ b/arch/ia64/sn/kernel/setup.c @@ -0,0 +1,621 @@ +/* + * 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) 1999,2001-2004 Silicon Graphics, Inc. All rights reserved. + */ + +#include <linux/config.h> +#include <linux/module.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 <linux/acpi.h> +#include <linux/compiler.h> +#include <linux/sched.h> +#include <linux/root_dev.h> +#include <linux/nodemask.h> + +#include <asm/io.h> +#include <asm/sal.h> +#include <asm/machvec.h> +#include <asm/system.h> +#include <asm/processor.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/simulator.h> +#include <asm/sn/leds.h> +#include <asm/sn/bte.h> +#include <asm/sn/shub_mmr.h> +#include <asm/sn/clksupport.h> +#include <asm/sn/sn_sal.h> +#include <asm/sn/geo.h> +#include "xtalk/xwidgetdev.h" +#include "xtalk/hubdev.h" +#include <asm/sn/klconfig.h> + + +DEFINE_PER_CPU(struct pda_s, pda_percpu); + +#define MAX_PHYS_MEMORY (1UL << 49) /* 1 TB */ + +lboard_t *root_lboard[MAX_COMPACT_NODES]; + +extern void bte_init_node(nodepda_t *, cnodeid_t); + +extern void sn_timer_init(void); +extern unsigned long last_time_offset; +extern void (*ia64_mark_idle) (int); +extern void snidle(int); +extern unsigned char acpi_kbd_controller_present; + +unsigned long sn_rtc_cycles_per_second; +EXPORT_SYMBOL(sn_rtc_cycles_per_second); + +DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info); +EXPORT_PER_CPU_SYMBOL(__sn_hub_info); + +partid_t sn_partid = -1; +EXPORT_SYMBOL(sn_partid); +char sn_system_serial_number_string[128]; +EXPORT_SYMBOL(sn_system_serial_number_string); +u64 sn_partition_serial_number; +EXPORT_SYMBOL(sn_partition_serial_number); +u8 sn_partition_id; +EXPORT_SYMBOL(sn_partition_id); +u8 sn_system_size; +EXPORT_SYMBOL(sn_system_size); +u8 sn_sharing_domain_size; +EXPORT_SYMBOL(sn_sharing_domain_size); +u8 sn_coherency_id; +EXPORT_SYMBOL(sn_coherency_id); +u8 sn_region_size; +EXPORT_SYMBOL(sn_region_size); + +short physical_node_map[MAX_PHYSNODE_ID]; + +EXPORT_SYMBOL(physical_node_map); + +int numionodes; + +static void sn_init_pdas(char **); +static void scan_for_ionodes(void); + +static nodepda_t *nodepdaindr[MAX_COMPACT_NODES]; + +/* + * 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). + */ +#ifdef CONFIG_IA64_GENERIC +extern char drive_info[4 * 16]; +#else +char drive_info[4 * 16]; +#endif + +/* + * Get nasid of current cpu early in boot before nodepda is initialized + */ +static int +boot_get_nasid(void) +{ + int nasid; + + if (ia64_sn_get_sapic_info(get_sapicid(), &nasid, NULL, NULL)) + BUG(); + return nasid; +} + +/* + * This routine can only be used during init, since + * smp_boot_data is an init data structure. + * We have to use smp_boot_data.cpu_phys_id to find + * the physical id of the processor because the normal + * cpu_physical_id() relies on data structures that + * may not be initialized yet. + */ + +static int __init pxm_to_nasid(int pxm) +{ + int i; + int nid; + + nid = pxm_to_nid_map[pxm]; + for (i = 0; i < num_node_memblks; i++) { + if (node_memblk[i].nid == nid) { + return NASID_GET(node_memblk[i].start_paddr); + } + } + return -1; +} + +/** + * early_sn_setup - early setup routine for SN platforms + * + * Sets up an initial console to aid debugging. Intended primarily + * for bringup. See start_kernel() in init/main.c. + */ + +void __init early_sn_setup(void) +{ + efi_system_table_t *efi_systab; + efi_config_table_t *config_tables; + struct ia64_sal_systab *sal_systab; + struct ia64_sal_desc_entry_point *ep; + char *p; + int i, j; + + /* + * Parse enough of the SAL tables to locate the SAL entry point. Since, console + * IO on SN2 is done via SAL calls, early_printk won't work without this. + * + * This code duplicates some of the ACPI table parsing that is in efi.c & sal.c. + * Any changes to those file may have to be made hereas well. + */ + efi_systab = (efi_system_table_t *) __va(ia64_boot_param->efi_systab); + config_tables = __va(efi_systab->tables); + for (i = 0; i < efi_systab->nr_tables; i++) { + if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == + 0) { + sal_systab = __va(config_tables[i].table); + p = (char *)(sal_systab + 1); + for (j = 0; j < sal_systab->entry_count; j++) { + if (*p == SAL_DESC_ENTRY_POINT) { + ep = (struct ia64_sal_desc_entry_point + *)p; + ia64_sal_handler_init(__va + (ep->sal_proc), + __va(ep->gp)); + return; + } + p += SAL_DESC_SIZE(*p); + } + } + } + /* Uh-oh, SAL not available?? */ + printk(KERN_ERR "failed to find SAL entry point\n"); +} + +extern int platform_intr_list[]; +extern nasid_t master_nasid; +static int shub_1_1_found __initdata; + +/* + * sn_check_for_wars + * + * Set flag for enabling shub specific wars + */ + +static inline int __init is_shub_1_1(int nasid) +{ + unsigned long id; + int rev; + + if (is_shub2()) + return 0; + id = REMOTE_HUB_L(nasid, SH1_SHUB_ID); + rev = (id & SH1_SHUB_ID_REVISION_MASK) >> SH1_SHUB_ID_REVISION_SHFT; + return rev <= 2; +} + +static void __init sn_check_for_wars(void) +{ + int cnode; + + if (is_shub2()) { + /* none yet */ + } else { + for_each_online_node(cnode) { + if (is_shub_1_1(cnodeid_to_nasid(cnode))) + sn_hub_info->shub_1_1_found = 1; + } + } +} + +/** + * 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 pxm; + int major = sn_sal_rev_major(), minor = sn_sal_rev_minor(); + extern void sn_cpu_init(void); + + /* + * If the generic code has enabled vga console support - lets + * get rid of it again. This is a kludge for the fact that ACPI + * currtently has no way of informing us if legacy VGA is available + * or not. + */ +#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) + if (conswitchp == &vga_con) { + printk(KERN_DEBUG "SGI: Disabling VGA console\n"); +#ifdef CONFIG_DUMMY_CONSOLE + conswitchp = &dummy_con; +#else + conswitchp = NULL; +#endif /* CONFIG_DUMMY_CONSOLE */ + } +#endif /* def(CONFIG_VT) && def(CONFIG_VGA_CONSOLE) */ + + MAX_DMA_ADDRESS = PAGE_OFFSET + MAX_PHYS_MEMORY; + + memset(physical_node_map, -1, sizeof(physical_node_map)); + for (pxm = 0; pxm < MAX_PXM_DOMAINS; pxm++) + if (pxm_to_nid_map[pxm] != -1) + physical_node_map[pxm_to_nasid(pxm)] = + pxm_to_nid_map[pxm]; + + /* + * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard + * support here so we don't have to listen to failed keyboard probe + * messages. + */ + if ((major < 2 || (major == 2 && minor <= 9)) && + acpi_kbd_controller_present) { + printk(KERN_INFO "Disabling legacy keyboard support as prom " + "is too old and doesn't provide FADT\n"); + acpi_kbd_controller_present = 0; + } + + printk("SGI SAL version %x.%02x\n", major, minor); + + /* + * Confirm the SAL we're running on is recent enough... + */ + if ((major < SN_SAL_MIN_MAJOR) || (major == SN_SAL_MIN_MAJOR && + minor < SN_SAL_MIN_MINOR)) { + printk(KERN_ERR "This kernel needs SGI SAL version >= " + "%x.%02x\n", SN_SAL_MIN_MAJOR, SN_SAL_MIN_MINOR); + panic("PROM version too old\n"); + } + + master_nasid = boot_get_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, guessing.\n"); + /* PROM gives wrong value for clock freq. so guess */ + sn_rtc_cycles_per_second = 1000000000000UL / 30000UL; + } else + sn_rtc_cycles_per_second = ticks_per_sec; + + platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR; + + /* + * we set the default root device to /dev/hda + * to make simulation easy + */ + ROOT_DEV = Root_HDA1; + + /* + * Create the PDAs and NODEPDAs for all the cpus. + */ + sn_init_pdas(cmdline_p); + + ia64_mark_idle = &snidle; + + /* + * 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; + + sn_timer_init(); +} + +/** + * sn_init_pdas - setup node data areas + * + * One time setup for Node Data Area. Called by sn_setup(). + */ +static void __init sn_init_pdas(char **cmdline_p) +{ + cnodeid_t cnode; + + memset(pda->cnodeid_to_nasid_table, -1, + sizeof(pda->cnodeid_to_nasid_table)); + for_each_online_node(cnode) + pda->cnodeid_to_nasid_table[cnode] = + pxm_to_nasid(nid_to_pxm_map[cnode]); + + numionodes = num_online_nodes(); + scan_for_ionodes(); + + /* + * Allocate & initalize the nodepda for each node. + */ + for_each_online_node(cnode) { + nodepdaindr[cnode] = + alloc_bootmem_node(NODE_DATA(cnode), sizeof(nodepda_t)); + memset(nodepdaindr[cnode], 0, sizeof(nodepda_t)); + memset(nodepdaindr[cnode]->phys_cpuid, -1, + sizeof(nodepdaindr[cnode]->phys_cpuid)); + } + + /* + * Allocate & initialize nodepda for TIOs. For now, put them on node 0. + */ + for (cnode = num_online_nodes(); cnode < numionodes; cnode++) { + nodepdaindr[cnode] = + alloc_bootmem_node(NODE_DATA(0), sizeof(nodepda_t)); + memset(nodepdaindr[cnode], 0, sizeof(nodepda_t)); + } + + /* + * Now copy the array of nodepda pointers to each nodepda. + */ + for (cnode = 0; cnode < numionodes; 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_each_online_node(cnode) { + bte_init_node(nodepdaindr[cnode], cnode); + } + + /* + * Initialize the per node hubdev. This includes IO Nodes and + * headless/memless nodes. + */ + for (cnode = 0; cnode < numionodes; cnode++) { + hubdev_init_node(nodepdaindr[cnode], cnode); + } +} + +/** + * 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 subnode; + int slice; + int cnode; + int i; + static int wars_have_been_checked; + + memset(pda, 0, sizeof(pda)); + if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift, + &sn_system_size, &sn_sharing_domain_size, &sn_partition_id, + &sn_coherency_id, &sn_region_size)) + BUG(); + sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2; + + /* + * The boot cpu makes this call again after platform initialization is + * complete. + */ + if (nodepdaindr[0] == NULL) + return; + + cpuid = smp_processor_id(); + cpuphyid = get_sapicid(); + + if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice)) + BUG(); + + for (i=0; i < MAX_NUMNODES; i++) { + if (nodepdaindr[i]) { + nodepdaindr[i]->phys_cpuid[cpuid].nasid = nasid; + nodepdaindr[i]->phys_cpuid[cpuid].slice = slice; + nodepdaindr[i]->phys_cpuid[cpuid].subnode = subnode; + } + } + + cnode = nasid_to_cnodeid(nasid); + + pda->p_nodepda = nodepdaindr[cnode]; + pda->led_address = + (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT)); + pda->led_state = LED_ALWAYS_SET; + pda->hb_count = HZ / 2; + pda->hb_state = 0; + pda->idle_flag = 0; + + if (cpuid != 0) { + memcpy(pda->cnodeid_to_nasid_table, + pdacpu(0)->cnodeid_to_nasid_table, + sizeof(pda->cnodeid_to_nasid_table)); + } + + /* + * Check for WARs. + * Only needs to be done once, on BSP. + * Has to be done after loop above, because it uses pda.cnodeid_to_nasid_table[i]. + * Has to be done before assignment below. + */ + if (!wars_have_been_checked) { + sn_check_for_wars(); + wars_have_been_checked = 1; + } + sn_hub_info->shub_1_1_found = shub_1_1_found; + + /* + * Set up addresses of PIO/MEM write status registers. + */ + { + u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0}; + u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_1, + SH2_PIO_WRITE_STATUS_2, SH2_PIO_WRITE_STATUS_3}; + u64 *pio; + pio = is_shub1() ? pio1 : pio2; + pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]); + pda->pio_write_status_val = is_shub1() ? SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK : 0; + } + + /* + * WAR addresses for SHUB 1.x. + */ + if (local_node_data->active_cpu_count++ == 0 && is_shub1()) { + int buddy_nasid; + buddy_nasid = + cnodeid_to_nasid(numa_node_id() == + num_online_nodes() - 1 ? 0 : numa_node_id() + 1); + pda->pio_shub_war_cam_addr = + (volatile unsigned long *)GLOBAL_MMR_ADDR(nasid, + SH1_PI_CAM_CONTROL); + } +} + +/* + * Scan klconfig for ionodes. Add the nasids to the + * physical_node_map and the pda and increment numionodes. + */ + +static void __init scan_for_ionodes(void) +{ + int nasid = 0; + lboard_t *brd; + + /* Setup ionodes with memory */ + for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) { + char *klgraph_header; + cnodeid_t cnodeid; + + if (physical_node_map[nasid] == -1) + continue; + + cnodeid = -1; + klgraph_header = __va(ia64_sn_get_klconfig_addr(nasid)); + if (!klgraph_header) { + if (IS_RUNNING_ON_SIMULATOR()) + continue; + BUG(); /* All nodes must have klconfig tables! */ + } + cnodeid = nasid_to_cnodeid(nasid); + root_lboard[cnodeid] = (lboard_t *) + NODE_OFFSET_TO_LBOARD((nasid), + ((kl_config_hdr_t + *) (klgraph_header))-> + ch_board_info); + } + + /* Scan headless/memless IO Nodes. */ + for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) { + /* if there's no nasid, don't try to read the klconfig on the node */ + if (physical_node_map[nasid] == -1) + continue; + brd = find_lboard_any((lboard_t *) + root_lboard[nasid_to_cnodeid(nasid)], + KLTYPE_SNIA); + if (brd) { + brd = KLCF_NEXT_ANY(brd); /* Skip this node's lboard */ + if (!brd) + continue; + } + + brd = find_lboard_any(brd, KLTYPE_SNIA); + + while (brd) { + pda->cnodeid_to_nasid_table[numionodes] = + brd->brd_nasid; + physical_node_map[brd->brd_nasid] = numionodes; + root_lboard[numionodes] = brd; + numionodes++; + brd = KLCF_NEXT_ANY(brd); + if (!brd) + break; + + brd = find_lboard_any(brd, KLTYPE_SNIA); + } + } + + /* Scan for TIO nodes. */ + for (nasid = 0; nasid < MAX_PHYSNODE_ID; nasid += 2) { + /* if there's no nasid, don't try to read the klconfig on the node */ + if (physical_node_map[nasid] == -1) + continue; + brd = find_lboard_any((lboard_t *) + root_lboard[nasid_to_cnodeid(nasid)], + KLTYPE_TIO); + while (brd) { + pda->cnodeid_to_nasid_table[numionodes] = + brd->brd_nasid; + physical_node_map[brd->brd_nasid] = numionodes; + root_lboard[numionodes] = brd; + numionodes++; + brd = KLCF_NEXT_ANY(brd); + if (!brd) + break; + + brd = find_lboard_any(brd, KLTYPE_TIO); + } + } + +} + +int +nasid_slice_to_cpuid(int nasid, int slice) +{ + long cpu; + + for (cpu=0; cpu < NR_CPUS; cpu++) + if (nodepda->phys_cpuid[cpu].nasid == nasid && nodepda->phys_cpuid[cpu].slice == slice) + return cpu; + + return -1; +} |