diff options
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r-- | arch/x86/include/asm/apic.h | 2 | ||||
-rw-r--r-- | arch/x86/include/asm/timer.h | 23 | ||||
-rw-r--r-- | arch/x86/include/asm/uv/uv_bau.h | 1 | ||||
-rw-r--r-- | arch/x86/include/asm/uv/uv_hub.h | 37 |
4 files changed, 58 insertions, 5 deletions
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 7b3ca8324b6..9b7273cb219 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -495,7 +495,7 @@ static inline void default_wait_for_init_deassert(atomic_t *deassert) return; } -extern struct apic *generic_bigsmp_probe(void); +extern void generic_bigsmp_probe(void); #ifdef CONFIG_X86_LOCAL_APIC diff --git a/arch/x86/include/asm/timer.h b/arch/x86/include/asm/timer.h index fa7b9176b76..431793e5d48 100644 --- a/arch/x86/include/asm/timer.h +++ b/arch/x86/include/asm/timer.h @@ -32,6 +32,22 @@ extern int no_timer_check; * (mathieu.desnoyers@polymtl.ca) * * -johnstul@us.ibm.com "math is hard, lets go shopping!" + * + * In: + * + * ns = cycles * cyc2ns_scale / SC + * + * Although we may still have enough bits to store the value of ns, + * in some cases, we may not have enough bits to store cycles * cyc2ns_scale, + * leading to an incorrect result. + * + * To avoid this, we can decompose 'cycles' into quotient and remainder + * of division by SC. Then, + * + * ns = (quot * SC + rem) * cyc2ns_scale / SC + * = quot * cyc2ns_scale + (rem * cyc2ns_scale) / SC + * + * - sqazi@google.com */ DECLARE_PER_CPU(unsigned long, cyc2ns); @@ -41,9 +57,14 @@ DECLARE_PER_CPU(unsigned long long, cyc2ns_offset); static inline unsigned long long __cycles_2_ns(unsigned long long cyc) { + unsigned long long quot; + unsigned long long rem; int cpu = smp_processor_id(); unsigned long long ns = per_cpu(cyc2ns_offset, cpu); - ns += cyc * per_cpu(cyc2ns, cpu) >> CYC2NS_SCALE_FACTOR; + quot = (cyc >> CYC2NS_SCALE_FACTOR); + rem = cyc & ((1ULL << CYC2NS_SCALE_FACTOR) - 1); + ns += quot * per_cpu(cyc2ns, cpu) + + ((rem * per_cpu(cyc2ns, cpu)) >> CYC2NS_SCALE_FACTOR); return ns; } diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h index 37d369859c8..0c767a8e000 100644 --- a/arch/x86/include/asm/uv/uv_bau.h +++ b/arch/x86/include/asm/uv/uv_bau.h @@ -55,6 +55,7 @@ #define UV_BAU_TUNABLES_DIR "sgi_uv" #define UV_BAU_TUNABLES_FILE "bau_tunables" #define WHITESPACE " \t\n" +#define uv_mmask ((1UL << uv_hub_info->m_val) - 1) #define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask)) #define cpubit_isset(cpu, bau_local_cpumask) \ test_bit((cpu), (bau_local_cpumask).bits) diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h index f26544a1521..54a13aaebc4 100644 --- a/arch/x86/include/asm/uv/uv_hub.h +++ b/arch/x86/include/asm/uv/uv_hub.h @@ -46,6 +46,13 @@ * PNODE - the low N bits of the GNODE. The PNODE is the most useful variant * of the nasid for socket usage. * + * GPA - (global physical address) a socket physical address converted + * so that it can be used by the GRU as a global address. Socket + * physical addresses 1) need additional NASID (node) bits added + * to the high end of the address, and 2) unaliased if the + * partition does not have a physical address 0. In addition, on + * UV2 rev 1, GPAs need the gnode left shifted to bits 39 or 40. + * * * NumaLink Global Physical Address Format: * +--------------------------------+---------------------+ @@ -141,6 +148,8 @@ struct uv_hub_info_s { unsigned int gnode_extra; unsigned char hub_revision; unsigned char apic_pnode_shift; + unsigned char m_shift; + unsigned char n_lshift; unsigned long gnode_upper; unsigned long lowmem_remap_top; unsigned long lowmem_remap_base; @@ -177,6 +186,16 @@ static inline int is_uv2_hub(void) return uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE; } +static inline int is_uv2_1_hub(void) +{ + return uv_hub_info->hub_revision == UV2_HUB_REVISION_BASE; +} + +static inline int is_uv2_2_hub(void) +{ + return uv_hub_info->hub_revision == UV2_HUB_REVISION_BASE + 1; +} + union uvh_apicid { unsigned long v; struct uvh_apicid_s { @@ -276,7 +295,10 @@ static inline unsigned long uv_soc_phys_ram_to_gpa(unsigned long paddr) { if (paddr < uv_hub_info->lowmem_remap_top) paddr |= uv_hub_info->lowmem_remap_base; - return paddr | uv_hub_info->gnode_upper; + paddr |= uv_hub_info->gnode_upper; + paddr = ((paddr << uv_hub_info->m_shift) >> uv_hub_info->m_shift) | + ((paddr >> uv_hub_info->m_val) << uv_hub_info->n_lshift); + return paddr; } @@ -300,16 +322,19 @@ static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa) unsigned long remap_base = uv_hub_info->lowmem_remap_base; unsigned long remap_top = uv_hub_info->lowmem_remap_top; + gpa = ((gpa << uv_hub_info->m_shift) >> uv_hub_info->m_shift) | + ((gpa >> uv_hub_info->n_lshift) << uv_hub_info->m_val); + gpa = gpa & uv_hub_info->gpa_mask; if (paddr >= remap_base && paddr < remap_base + remap_top) paddr -= remap_base; return paddr; } -/* gnode -> pnode */ +/* gpa -> pnode */ static inline unsigned long uv_gpa_to_gnode(unsigned long gpa) { - return gpa >> uv_hub_info->m_val; + return gpa >> uv_hub_info->n_lshift; } /* gpa -> pnode */ @@ -320,6 +345,12 @@ static inline int uv_gpa_to_pnode(unsigned long gpa) return uv_gpa_to_gnode(gpa) & n_mask; } +/* gpa -> node offset*/ +static inline unsigned long uv_gpa_to_offset(unsigned long gpa) +{ + return (gpa << uv_hub_info->m_shift) >> uv_hub_info->m_shift; +} + /* pnode, offset --> socket virtual */ static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset) { |