diff options
| -rw-r--r-- | arch/x86/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/bios_uv.c | 48 | ||||
| -rw-r--r-- | arch/x86/kernel/genx2apic_uv_x.c | 23 | ||||
| -rw-r--r-- | include/asm-x86/uv/bios.h | 68 |
4 files changed, 140 insertions, 0 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 673f1d12b420..ea000467553f 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -102,6 +102,7 @@ obj-$(CONFIG_OLPC) += olpc.o # 64 bit specific files ifeq ($(CONFIG_X86_64),y) obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o + obj-y += bios_uv.o obj-y += genx2apic_cluster.o obj-y += genx2apic_phys.o obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c new file mode 100644 index 000000000000..c639bd55391c --- /dev/null +++ b/arch/x86/kernel/bios_uv.c @@ -0,0 +1,48 @@ +/* + * BIOS run time interface routines. + * + * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <asm/uv/bios.h> + +const char * +x86_bios_strerror(long status) +{ + const char *str; + switch (status) { + case 0: str = "Call completed without error"; break; + case -1: str = "Not implemented"; break; + case -2: str = "Invalid argument"; break; + case -3: str = "Call completed with error"; break; + default: str = "Unknown BIOS status code"; break; + } + return str; +} + +long +x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second, + unsigned long *drift_info) +{ + struct uv_bios_retval isrv; + + BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0); + *ticks_per_second = isrv.v0; + *drift_info = isrv.v1; + return isrv.status; +} +EXPORT_SYMBOL_GPL(x86_bios_freq_base); diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c index 3ca29cd8c23c..a8e5cb4c4d43 100644 --- a/arch/x86/kernel/genx2apic_uv_x.c +++ b/arch/x86/kernel/genx2apic_uv_x.c @@ -25,6 +25,7 @@ #include <asm/pgtable.h> #include <asm/uv/uv_mmrs.h> #include <asm/uv/uv_hub.h> +#include <asm/uv/bios.h> DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); @@ -41,6 +42,9 @@ EXPORT_SYMBOL_GPL(uv_cpu_to_blade); short uv_possible_blades; EXPORT_SYMBOL_GPL(uv_possible_blades); +unsigned long sn_rtc_cycles_per_second; +EXPORT_SYMBOL(sn_rtc_cycles_per_second); + /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ static cpumask_t uv_target_cpus(void) @@ -306,6 +310,23 @@ static __init void map_mmioh_high(int max_pnode) map_high("MMIOH", mmioh.s.base, shift, map_uc); } +static __init void uv_rtc_init(void) +{ + long status, ticks_per_sec, drift; + + status = + x86_bios_freq_base(BIOS_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"); + /* BIOS gives wrong value for clock freq. so guess */ + sn_rtc_cycles_per_second = 1000000000000UL / 30000UL; + } else + sn_rtc_cycles_per_second = ticks_per_sec; +} + static __init void uv_system_init(void) { union uvh_si_addr_map_config_u m_n_config; @@ -360,6 +381,8 @@ static __init void uv_system_init(void) gnode_upper = (((unsigned long)node_id.s.node_id) & ~((1 << n_val) - 1)) << m_val; + uv_rtc_init(); + for_each_present_cpu(cpu) { nid = cpu_to_node(cpu); pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu)); diff --git a/include/asm-x86/uv/bios.h b/include/asm-x86/uv/bios.h new file mode 100644 index 000000000000..aa73362ff5df --- /dev/null +++ b/include/asm-x86/uv/bios.h @@ -0,0 +1,68 @@ +#ifndef _ASM_X86_BIOS_H +#define _ASM_X86_BIOS_H + +/* + * BIOS layer definitions. + * + * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/rtc.h> + +#define BIOS_FREQ_BASE 0x01000001 + +enum { + BIOS_FREQ_BASE_PLATFORM = 0, + BIOS_FREQ_BASE_INTERVAL_TIMER = 1, + BIOS_FREQ_BASE_REALTIME_CLOCK = 2 +}; + +# define BIOS_CALL(result, a0, a1, a2, a3, a4, a5, a6, a7) \ + do { \ + /* XXX - the real call goes here */ \ + result.status = BIOS_STATUS_UNIMPLEMENTED; \ + isrv.v0 = 0; \ + isrv.v1 = 0; \ + } while (0) + +enum { + BIOS_STATUS_SUCCESS = 0, + BIOS_STATUS_UNIMPLEMENTED = -1, + BIOS_STATUS_EINVAL = -2, + BIOS_STATUS_ERROR = -3 +}; + +struct uv_bios_retval { + /* + * A zero status value indicates call completed without error. + * A negative status value indicates reason of call failure. + * A positive status value indicates success but an + * informational value should be printed (e.g., "reboot for + * change to take effect"). + */ + s64 status; + u64 v0; + u64 v1; + u64 v2; +}; + +extern long +x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second, + unsigned long *drift_info); +extern const char *x86_bios_strerror(long status); + +#endif /* _ASM_X86_BIOS_H */ |