mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-17 17:14:08 +00:00
d0f13e3c20
The basic issue is to be able to do what hugetlbfs does but with different page sizes for some other special filesystems; more specifically, my need is: - Huge pages - SPE local store mappings using 64K pages on a 4K base page size kernel on Cell - Some special 4K segments in 64K-page kernels for mapping a dodgy type of powerpc-specific infiniband hardware that requires 4K MMU mappings for various reasons I won't explain here. The main issues are: - To maintain/keep track of the page size per "segment" (as we can only have one page size per segment on powerpc, which are 256MB divisions of the address space). - To make sure special mappings stay within their allotted "segments" (including MAP_FIXED crap) - To make sure everybody else doesn't mmap/brk/grow_stack into a "segment" that is used for a special mapping Some of the necessary mechanisms to handle that were present in the hugetlbfs code, but mostly in ways not suitable for anything else. The patch relies on some changes to the generic get_unmapped_area() that just got merged. It still hijacks hugetlb callbacks here or there as the generic code hasn't been entirely cleaned up yet but that shouldn't be a problem. So what is a slice ? Well, I re-used the mechanism used formerly by our hugetlbfs implementation which divides the address space in "meta-segments" which I called "slices". The division is done using 256MB slices below 4G, and 1T slices above. Thus the address space is divided currently into 16 "low" slices and 16 "high" slices. (Special case: high slice 0 is the area between 4G and 1T). Doing so simplifies significantly the tracking of segments and avoids having to keep track of all the 256MB segments in the address space. While I used the "concepts" of hugetlbfs, I mostly re-implemented everything in a more generic way and "ported" hugetlbfs to it. Slices can have an associated page size, which is encoded in the mmu context and used by the SLB miss handler to set the segment sizes. The hash code currently doesn't care, it has a specific check for hugepages, though I might add a mechanism to provide per-slice hash mapping functions in the future. The slice code provide a pair of "generic" get_unmapped_area() (bottomup and topdown) functions that should work with any slice size. There is some trickiness here so I would appreciate people to have a look at the implementation of these and let me know if I got something wrong. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
316 lines
14 KiB
C
316 lines
14 KiB
C
/*
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* This program is used to generate definitions needed by
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* assembly language modules.
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*
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* We use the technique used in the OSF Mach kernel code:
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* generate asm statements containing #defines,
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* compile this file to assembler, and then extract the
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* #defines from the assembly-language output.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/suspend.h>
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#ifdef CONFIG_PPC64
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#include <linux/time.h>
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#include <linux/hardirq.h>
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#else
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#include <linux/ptrace.h>
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#endif
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/cputable.h>
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#include <asm/thread_info.h>
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#include <asm/rtas.h>
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#include <asm/vdso_datapage.h>
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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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#include <asm/lppaca.h>
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#include <asm/cache.h>
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#include <asm/compat.h>
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#include <asm/mmu.h>
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#include <asm/hvcall.h>
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#endif
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#define DEFINE(sym, val) \
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asm volatile("\n->" #sym " %0 " #val : : "i" (val))
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#define BLANK() asm volatile("\n->" : : )
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int main(void)
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{
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DEFINE(THREAD, offsetof(struct task_struct, thread));
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DEFINE(MM, offsetof(struct task_struct, mm));
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#ifdef CONFIG_PPC64
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DEFINE(AUDITCONTEXT, offsetof(struct task_struct, audit_context));
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#else
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DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info));
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DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
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#endif /* CONFIG_PPC64 */
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DEFINE(KSP, offsetof(struct thread_struct, ksp));
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DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
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DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
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DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
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DEFINE(THREAD_FPSCR, offsetof(struct thread_struct, fpscr));
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#ifdef CONFIG_ALTIVEC
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DEFINE(THREAD_VR0, offsetof(struct thread_struct, vr[0]));
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DEFINE(THREAD_VRSAVE, offsetof(struct thread_struct, vrsave));
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DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
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DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
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#endif /* CONFIG_ALTIVEC */
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#ifdef CONFIG_PPC64
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DEFINE(KSP_VSID, offsetof(struct thread_struct, ksp_vsid));
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#else /* CONFIG_PPC64 */
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DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
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#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
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DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));
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DEFINE(PT_PTRACED, PT_PTRACED);
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#endif
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#ifdef CONFIG_SPE
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DEFINE(THREAD_EVR0, offsetof(struct thread_struct, evr[0]));
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DEFINE(THREAD_ACC, offsetof(struct thread_struct, acc));
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DEFINE(THREAD_SPEFSCR, offsetof(struct thread_struct, spefscr));
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DEFINE(THREAD_USED_SPE, offsetof(struct thread_struct, used_spe));
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#endif /* CONFIG_SPE */
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#endif /* CONFIG_PPC64 */
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DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
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DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, local_flags));
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DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
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DEFINE(TI_TASK, offsetof(struct thread_info, task));
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#ifdef CONFIG_PPC32
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DEFINE(TI_EXECDOMAIN, offsetof(struct thread_info, exec_domain));
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DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
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#endif /* CONFIG_PPC32 */
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#ifdef CONFIG_PPC64
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DEFINE(DCACHEL1LINESIZE, offsetof(struct ppc64_caches, dline_size));
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DEFINE(DCACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_dline_size));
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DEFINE(DCACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, dlines_per_page));
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DEFINE(ICACHEL1LINESIZE, offsetof(struct ppc64_caches, iline_size));
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DEFINE(ICACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_iline_size));
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DEFINE(ICACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, ilines_per_page));
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/* paca */
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DEFINE(PACA_SIZE, sizeof(struct paca_struct));
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DEFINE(PACAPACAINDEX, offsetof(struct paca_struct, paca_index));
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DEFINE(PACAPROCSTART, offsetof(struct paca_struct, cpu_start));
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DEFINE(PACAKSAVE, offsetof(struct paca_struct, kstack));
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DEFINE(PACACURRENT, offsetof(struct paca_struct, __current));
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DEFINE(PACASAVEDMSR, offsetof(struct paca_struct, saved_msr));
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DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real));
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DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr));
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DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr));
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DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1));
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DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc));
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DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled));
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DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled));
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DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
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DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
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DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
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DEFINE(PACAVMALLOCSLLP, offsetof(struct paca_struct, vmalloc_sllp));
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#ifdef CONFIG_PPC_MM_SLICES
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DEFINE(PACALOWSLICESPSIZE, offsetof(struct paca_struct,
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context.low_slices_psize));
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DEFINE(PACAHIGHSLICEPSIZE, offsetof(struct paca_struct,
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context.high_slices_psize));
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DEFINE(MMUPSIZEDEFSIZE, sizeof(struct mmu_psize_def));
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DEFINE(MMUPSIZESLLP, offsetof(struct mmu_psize_def, sllp));
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#else
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DEFINE(PACACONTEXTSLLP, offsetof(struct paca_struct, context.sllp));
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#endif /* CONFIG_PPC_MM_SLICES */
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DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen));
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DEFINE(PACA_EXMC, offsetof(struct paca_struct, exmc));
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DEFINE(PACA_EXSLB, offsetof(struct paca_struct, exslb));
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DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp));
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DEFINE(PACALPPACAPTR, offsetof(struct paca_struct, lppaca_ptr));
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DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id));
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DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr));
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DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time));
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DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time));
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DEFINE(PACA_SLBSHADOWPTR, offsetof(struct paca_struct, slb_shadow_ptr));
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DEFINE(PACA_DATA_OFFSET, offsetof(struct paca_struct, data_offset));
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DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save));
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DEFINE(SLBSHADOW_STACKVSID,
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offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].vsid));
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DEFINE(SLBSHADOW_STACKESID,
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offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].esid));
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DEFINE(LPPACASRR0, offsetof(struct lppaca, saved_srr0));
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DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1));
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DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int));
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DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int));
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DEFINE(SLBSHADOW_SAVEAREA, offsetof(struct slb_shadow, save_area));
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#endif /* CONFIG_PPC64 */
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/* RTAS */
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DEFINE(RTASBASE, offsetof(struct rtas_t, base));
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DEFINE(RTASENTRY, offsetof(struct rtas_t, entry));
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/* Interrupt register frame */
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DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
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#ifndef CONFIG_PPC64
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DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
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#else /* CONFIG_PPC64 */
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DEFINE(SWITCH_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
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/* 288 = # of volatile regs, int & fp, for leaf routines */
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/* which do not stack a frame. See the PPC64 ABI. */
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DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 288);
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/* Create extra stack space for SRR0 and SRR1 when calling prom/rtas. */
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DEFINE(PROM_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 16);
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DEFINE(RTAS_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 16);
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/* hcall statistics */
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DEFINE(HCALL_STAT_SIZE, sizeof(struct hcall_stats));
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DEFINE(HCALL_STAT_CALLS, offsetof(struct hcall_stats, num_calls));
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DEFINE(HCALL_STAT_TB, offsetof(struct hcall_stats, tb_total));
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DEFINE(HCALL_STAT_PURR, offsetof(struct hcall_stats, purr_total));
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#endif /* CONFIG_PPC64 */
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DEFINE(GPR0, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[0]));
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DEFINE(GPR1, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[1]));
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DEFINE(GPR2, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[2]));
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DEFINE(GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[3]));
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DEFINE(GPR4, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[4]));
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DEFINE(GPR5, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[5]));
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DEFINE(GPR6, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[6]));
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DEFINE(GPR7, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[7]));
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DEFINE(GPR8, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[8]));
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DEFINE(GPR9, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[9]));
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DEFINE(GPR10, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[10]));
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DEFINE(GPR11, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[11]));
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DEFINE(GPR12, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[12]));
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DEFINE(GPR13, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[13]));
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#ifndef CONFIG_PPC64
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DEFINE(GPR14, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[14]));
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DEFINE(GPR15, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[15]));
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DEFINE(GPR16, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[16]));
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DEFINE(GPR17, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[17]));
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DEFINE(GPR18, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[18]));
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DEFINE(GPR19, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[19]));
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DEFINE(GPR20, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[20]));
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DEFINE(GPR21, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[21]));
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DEFINE(GPR22, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[22]));
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DEFINE(GPR23, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[23]));
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DEFINE(GPR24, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[24]));
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DEFINE(GPR25, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[25]));
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DEFINE(GPR26, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[26]));
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DEFINE(GPR27, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[27]));
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DEFINE(GPR28, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[28]));
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DEFINE(GPR29, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[29]));
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DEFINE(GPR30, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[30]));
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DEFINE(GPR31, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[31]));
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#endif /* CONFIG_PPC64 */
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/*
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* Note: these symbols include _ because they overlap with special
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* register names
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*/
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DEFINE(_NIP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, nip));
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DEFINE(_MSR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, msr));
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DEFINE(_CTR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ctr));
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DEFINE(_LINK, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, link));
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DEFINE(_CCR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ccr));
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DEFINE(_XER, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, xer));
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DEFINE(_DAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
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DEFINE(_DSISR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
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DEFINE(ORIG_GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, orig_gpr3));
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DEFINE(RESULT, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, result));
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DEFINE(_TRAP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, trap));
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#ifndef CONFIG_PPC64
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DEFINE(_MQ, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, mq));
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/*
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* The PowerPC 400-class & Book-E processors have neither the DAR
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* nor the DSISR SPRs. Hence, we overload them to hold the similar
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* DEAR and ESR SPRs for such processors. For critical interrupts
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* we use them to hold SRR0 and SRR1.
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*/
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DEFINE(_DEAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
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DEFINE(_ESR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
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#else /* CONFIG_PPC64 */
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DEFINE(SOFTE, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, softe));
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/* These _only_ to be used with {PROM,RTAS}_FRAME_SIZE!!! */
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DEFINE(_SRR0, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs));
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DEFINE(_SRR1, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs)+8);
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#endif /* CONFIG_PPC64 */
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DEFINE(CLONE_VM, CLONE_VM);
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DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
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#ifndef CONFIG_PPC64
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DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
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#endif /* ! CONFIG_PPC64 */
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/* About the CPU features table */
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DEFINE(CPU_SPEC_ENTRY_SIZE, sizeof(struct cpu_spec));
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DEFINE(CPU_SPEC_PVR_MASK, offsetof(struct cpu_spec, pvr_mask));
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DEFINE(CPU_SPEC_PVR_VALUE, offsetof(struct cpu_spec, pvr_value));
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DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
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DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
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DEFINE(CPU_SPEC_RESTORE, offsetof(struct cpu_spec, cpu_restore));
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DEFINE(pbe_address, offsetof(struct pbe, address));
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DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
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DEFINE(pbe_next, offsetof(struct pbe, next));
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#ifndef CONFIG_PPC64
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DEFINE(TASK_SIZE, TASK_SIZE);
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DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);
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#endif /* ! CONFIG_PPC64 */
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/* datapage offsets for use by vdso */
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DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct vdso_data, tb_orig_stamp));
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DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct vdso_data, tb_ticks_per_sec));
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DEFINE(CFG_TB_TO_XS, offsetof(struct vdso_data, tb_to_xs));
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DEFINE(CFG_STAMP_XSEC, offsetof(struct vdso_data, stamp_xsec));
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DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct vdso_data, tb_update_count));
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DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct vdso_data, tz_minuteswest));
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DEFINE(CFG_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime));
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DEFINE(CFG_SYSCALL_MAP32, offsetof(struct vdso_data, syscall_map_32));
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DEFINE(WTOM_CLOCK_SEC, offsetof(struct vdso_data, wtom_clock_sec));
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DEFINE(WTOM_CLOCK_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));
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#ifdef CONFIG_PPC64
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DEFINE(CFG_SYSCALL_MAP64, offsetof(struct vdso_data, syscall_map_64));
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DEFINE(TVAL64_TV_SEC, offsetof(struct timeval, tv_sec));
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DEFINE(TVAL64_TV_USEC, offsetof(struct timeval, tv_usec));
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DEFINE(TVAL32_TV_SEC, offsetof(struct compat_timeval, tv_sec));
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DEFINE(TVAL32_TV_USEC, offsetof(struct compat_timeval, tv_usec));
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DEFINE(TSPC64_TV_SEC, offsetof(struct timespec, tv_sec));
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DEFINE(TSPC64_TV_NSEC, offsetof(struct timespec, tv_nsec));
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DEFINE(TSPC32_TV_SEC, offsetof(struct compat_timespec, tv_sec));
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DEFINE(TSPC32_TV_NSEC, offsetof(struct compat_timespec, tv_nsec));
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#else
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DEFINE(TVAL32_TV_SEC, offsetof(struct timeval, tv_sec));
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DEFINE(TVAL32_TV_USEC, offsetof(struct timeval, tv_usec));
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DEFINE(TSPC32_TV_SEC, offsetof(struct timespec, tv_sec));
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DEFINE(TSPC32_TV_NSEC, offsetof(struct timespec, tv_nsec));
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#endif
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/* timeval/timezone offsets for use by vdso */
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DEFINE(TZONE_TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
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DEFINE(TZONE_TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
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/* Other bits used by the vdso */
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DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
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DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
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DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
|
|
DEFINE(CLOCK_REALTIME_RES, TICK_NSEC);
|
|
|
|
#ifdef CONFIG_BUG
|
|
DEFINE(BUG_ENTRY_SIZE, sizeof(struct bug_entry));
|
|
#endif
|
|
return 0;
|
|
}
|