diff options
Diffstat (limited to 'arch/mips/sgi-ip27/ip27-init.c')
| -rw-r--r-- | arch/mips/sgi-ip27/ip27-init.c | 221 |
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); +} |