3ad5ef8b9d
Add support in IA64 acpi for platforms that support more than 256 nodes. Currently, ACPI is limited to 256 nodes because the proximity domain number is 8-bits. Long term, we expect to use ACPI3.0 to support >256 nodes. This patch is an interim solution that works with platforms that pass the high order bits of the proximity domain in "reserved" fields of the ACPI tables. This code is enabled ONLY on SN platforms. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/*
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* asm-ia64/acpi.h
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
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* Copyright (C) 2001,2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#ifndef _ASM_ACPI_H
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#define _ASM_ACPI_H
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#ifdef __KERNEL__
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#include <linux/init.h>
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#include <linux/numa.h>
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#include <asm/system.h>
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#define COMPILER_DEPENDENT_INT64 long
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#define COMPILER_DEPENDENT_UINT64 unsigned long
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/*
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* Calling conventions:
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*
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* ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
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* ACPI_EXTERNAL_XFACE - External ACPI interfaces
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* ACPI_INTERNAL_XFACE - Internal ACPI interfaces
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* ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
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*/
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#define ACPI_SYSTEM_XFACE
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#define ACPI_EXTERNAL_XFACE
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#define ACPI_INTERNAL_XFACE
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#define ACPI_INTERNAL_VAR_XFACE
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/* Asm macros */
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#define ACPI_ASM_MACROS
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#define BREAKPOINT3
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#define ACPI_DISABLE_IRQS() local_irq_disable()
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#define ACPI_ENABLE_IRQS() local_irq_enable()
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#define ACPI_FLUSH_CPU_CACHE()
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static inline int
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ia64_acpi_acquire_global_lock (unsigned int *lock)
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{
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unsigned int old, new, val;
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do {
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old = *lock;
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new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
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val = ia64_cmpxchg4_acq(lock, new, old);
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} while (unlikely (val != old));
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return (new < 3) ? -1 : 0;
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}
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static inline int
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ia64_acpi_release_global_lock (unsigned int *lock)
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{
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unsigned int old, new, val;
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do {
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old = *lock;
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new = old & ~0x3;
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val = ia64_cmpxchg4_acq(lock, new, old);
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} while (unlikely (val != old));
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return old & 0x1;
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}
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#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
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((Acq) = ia64_acpi_acquire_global_lock((unsigned int *) GLptr))
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#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
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((Acq) = ia64_acpi_release_global_lock((unsigned int *) GLptr))
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#define acpi_disabled 0 /* ACPI always enabled on IA64 */
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#define acpi_noirq 0 /* ACPI always enabled on IA64 */
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#define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */
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#define acpi_strict 1 /* no ACPI spec workarounds on IA64 */
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static inline void disable_acpi(void) { }
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const char *acpi_get_sysname (void);
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int acpi_request_vector (u32 int_type);
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int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
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/*
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* Record the cpei override flag and current logical cpu. This is
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* useful for CPU removal.
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*/
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extern unsigned int can_cpei_retarget(void);
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extern unsigned int is_cpu_cpei_target(unsigned int cpu);
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extern void set_cpei_target_cpu(unsigned int cpu);
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extern unsigned int get_cpei_target_cpu(void);
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extern void prefill_possible_map(void);
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extern int additional_cpus;
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#ifdef CONFIG_ACPI_NUMA
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/* Proximity bitmap length; _PXM is at most 255 (8 bit)*/
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#ifdef CONFIG_IA64_NR_NODES
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#define MAX_PXM_DOMAINS CONFIG_IA64_NR_NODES
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#else
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#define MAX_PXM_DOMAINS (256)
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#endif
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extern int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
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extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
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#endif
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extern u16 ia64_acpiid_to_sapicid[];
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/*
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* Refer Intel ACPI _PDC support document for bit definitions
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*/
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#define ACPI_PDC_EST_CAPABILITY_SMP 0x8
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#endif /*__KERNEL__*/
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#endif /*_ASM_ACPI_H*/
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