diff options
Diffstat (limited to 'arch/ia64/kernel/sal.c')
| -rw-r--r-- | arch/ia64/kernel/sal.c | 111 |
1 files changed, 107 insertions, 4 deletions
diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c index acc0f132f86..0464173ea56 100644 --- a/arch/ia64/kernel/sal.c +++ b/arch/ia64/kernel/sal.c @@ -6,7 +6,6 @@ * Copyright (C) 1999 VA Linux Systems * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> */ -#include <linux/config.h> #include <linux/kernel.h> #include <linux/init.h> @@ -14,6 +13,7 @@ #include <linux/spinlock.h> #include <linux/string.h> +#include <asm/delay.h> #include <asm/page.h> #include <asm/sal.h> #include <asm/pal.h> @@ -109,6 +109,13 @@ check_versions (struct ia64_sal_systab *systab) sal_revision = SAL_VERSION_CODE(2, 8); sal_version = SAL_VERSION_CODE(0, 0); } + + if (ia64_platform_is("sn2") && (sal_revision == SAL_VERSION_CODE(2, 9))) + /* + * SGI Altix has hard-coded version 2.9 in their prom + * but they actually implement 3.2, so let's fix it here. + */ + sal_revision = SAL_VERSION_CODE(3, 2); } static void __init @@ -134,7 +141,7 @@ set_smp_redirect (int flag) * interrupt redirection. The reason is this would require that * All interrupts be stopped and hard bind the irq to a cpu. * Later when the interrupt is fired we need to set the redir hint - * on again in the vector. This is combersome for something that the + * on again in the vector. This is cumbersome for something that the * user mode irq balancer will solve anyways. */ no_int_routing=1; @@ -194,9 +201,8 @@ static void __init chk_nointroute_opt(void) { char *cp; - extern char saved_command_line[]; - for (cp = saved_command_line; *cp; ) { + for (cp = boot_command_line; *cp; ) { if (memcmp(cp, "nointroute", 10) == 0) { no_int_routing = 1; printk ("no_int_routing on\n"); @@ -214,6 +220,89 @@ chk_nointroute_opt(void) static void __init sal_desc_ap_wakeup(void *p) { } #endif +/* + * HP rx5670 firmware polls for interrupts during SAL_CACHE_FLUSH by reading + * cr.ivr, but it never writes cr.eoi. This leaves any interrupt marked as + * "in-service" and masks other interrupts of equal or lower priority. + * + * HP internal defect reports: F1859, F2775, F3031. + */ +static int sal_cache_flush_drops_interrupts; + +static int __init +force_pal_cache_flush(char *str) +{ + sal_cache_flush_drops_interrupts = 1; + return 0; +} +early_param("force_pal_cache_flush", force_pal_cache_flush); + +void __init +check_sal_cache_flush (void) +{ + unsigned long flags; + int cpu; + u64 vector, cache_type = 3; + struct ia64_sal_retval isrv; + + if (sal_cache_flush_drops_interrupts) + return; + + cpu = get_cpu(); + local_irq_save(flags); + + /* + * Send ourselves a timer interrupt, wait until it's reported, and see + * if SAL_CACHE_FLUSH drops it. + */ + platform_send_ipi(cpu, IA64_TIMER_VECTOR, IA64_IPI_DM_INT, 0); + + while (!ia64_get_irr(IA64_TIMER_VECTOR)) + cpu_relax(); + + SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0); + + if (isrv.status) + printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status); + + if (ia64_get_irr(IA64_TIMER_VECTOR)) { + vector = ia64_get_ivr(); + ia64_eoi(); + WARN_ON(vector != IA64_TIMER_VECTOR); + } else { + sal_cache_flush_drops_interrupts = 1; + printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; " + "PAL_CACHE_FLUSH will be used instead\n"); + ia64_eoi(); + } + + local_irq_restore(flags); + put_cpu(); +} + +s64 +ia64_sal_cache_flush (u64 cache_type) +{ + struct ia64_sal_retval isrv; + + if (sal_cache_flush_drops_interrupts) { + unsigned long flags; + u64 progress; + s64 rc; + + progress = 0; + local_irq_save(flags); + rc = ia64_pal_cache_flush(cache_type, + PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL); + local_irq_restore(flags); + return rc; + } + + SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0); + return isrv.status; +} +EXPORT_SYMBOL_GPL(ia64_sal_cache_flush); + void __init ia64_sal_init (struct ia64_sal_systab *systab) { @@ -262,6 +351,7 @@ ia64_sal_init (struct ia64_sal_systab *systab) } p += SAL_DESC_SIZE(*p); } + } int @@ -300,3 +390,16 @@ ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc, return 0; } EXPORT_SYMBOL(ia64_sal_oemcall_reentrant); + +long +ia64_sal_freq_base (unsigned long which, unsigned long *ticks_per_second, + unsigned long *drift_info) +{ + struct ia64_sal_retval isrv; + + SAL_CALL(isrv, SAL_FREQ_BASE, which, 0, 0, 0, 0, 0, 0); + *ticks_per_second = isrv.v0; + *drift_info = isrv.v1; + return isrv.status; +} +EXPORT_SYMBOL_GPL(ia64_sal_freq_base); |