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linux-2.6/arch/ppc64/kernel/asm-offsets.c
David Gibson c594adad56 [PATCH] Dynamic hugepage addresses for ppc64 
Paulus, I think this is now a reasonable candidate for the post-2.6.13
queue.

Relax address restrictions for hugepages on ppc64

Presently, 64-bit applications on ppc64 may only use hugepages in the
address region from 1-1.5T.  Furthermore, if hugepages are enabled in
the kernel config, they may only use hugepages and never normal pages
in this area.  This patch relaxes this restriction, allowing any
address to be used with hugepages, but with a 1TB granularity.  That
is if you map a hugepage anywhere in the region 1TB-2TB, that entire
area will be reserved exclusively for hugepages for the remainder of
the process's lifetime.  This works analagously to hugepages in 32-bit
applications, where hugepages can be mapped anywhere, but with 256MB
(mmu segment) granularity.

This patch applies on top of the four level pagetable patch
(http://patchwork.ozlabs.org/linuxppc64/patch?id=1936).

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29 10:53:38 +10:00

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/*
* This program is used to generate definitions needed by
* assembly language modules.
*
* We use the technique used in the OSF Mach kernel code:
* generate asm statements containing #defines,
* compile this file to assembler, and then extract the
* #defines from the assembly-language output.
*
* 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.
*/
#include <linux/config.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/time.h>
#include <linux/hardirq.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/paca.h>
#include <asm/lppaca.h>
#include <asm/iSeries/HvLpEvent.h>
#include <asm/rtas.h>
#include <asm/cputable.h>
#include <asm/cache.h>
#include <asm/systemcfg.h>
#include <asm/compat.h>
#define DEFINE(sym, val) \
asm volatile("\n->" #sym " %0 " #val : : "i" (val))
#define BLANK() asm volatile("\n->" : : )
int main(void)
{
/* thread struct on stack */
DEFINE(THREAD_SHIFT, THREAD_SHIFT);
DEFINE(THREAD_SIZE, THREAD_SIZE);
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
DEFINE(TI_SC_NOERR, offsetof(struct thread_info, syscall_noerror));
/* task_struct->thread */
DEFINE(THREAD, offsetof(struct task_struct, thread));
DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
DEFINE(THREAD_FPSCR, offsetof(struct thread_struct, fpscr));
DEFINE(KSP, offsetof(struct thread_struct, ksp));
DEFINE(KSP_VSID, offsetof(struct thread_struct, ksp_vsid));
#ifdef CONFIG_ALTIVEC
DEFINE(THREAD_VR0, offsetof(struct thread_struct, vr[0]));
DEFINE(THREAD_VRSAVE, offsetof(struct thread_struct, vrsave));
DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
#endif /* CONFIG_ALTIVEC */
DEFINE(MM, offsetof(struct task_struct, mm));
DEFINE(DCACHEL1LINESIZE, offsetof(struct ppc64_caches, dline_size));
DEFINE(DCACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_dline_size));
DEFINE(DCACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, dlines_per_page));
DEFINE(ICACHEL1LINESIZE, offsetof(struct ppc64_caches, iline_size));
DEFINE(ICACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_iline_size));
DEFINE(ICACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, ilines_per_page));
DEFINE(PLATFORM, offsetof(struct systemcfg, platform));
/* paca */
DEFINE(PACA_SIZE, sizeof(struct paca_struct));
DEFINE(PACAPACAINDEX, offsetof(struct paca_struct, paca_index));
DEFINE(PACAPROCSTART, offsetof(struct paca_struct, cpu_start));
DEFINE(PACAKSAVE, offsetof(struct paca_struct, kstack));
DEFINE(PACACURRENT, offsetof(struct paca_struct, __current));
DEFINE(PACASAVEDMSR, offsetof(struct paca_struct, saved_msr));
DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real));
DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr));
DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr));
DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1));
DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc));
DEFINE(PACAPROCENABLED, offsetof(struct paca_struct, proc_enabled));
DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
#ifdef CONFIG_HUGETLB_PAGE
DEFINE(PACALOWHTLBAREAS, offsetof(struct paca_struct, context.low_htlb_areas));
DEFINE(PACAHIGHHTLBAREAS, offsetof(struct paca_struct, context.high_htlb_areas));
#endif /* CONFIG_HUGETLB_PAGE */
DEFINE(PACADEFAULTDECR, offsetof(struct paca_struct, default_decr));
DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen));
DEFINE(PACA_EXMC, offsetof(struct paca_struct, exmc));
DEFINE(PACA_EXSLB, offsetof(struct paca_struct, exslb));
DEFINE(PACA_EXDSI, offsetof(struct paca_struct, exdsi));
DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp));
DEFINE(PACALPPACA, offsetof(struct paca_struct, lppaca));
DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id));
DEFINE(LPPACASRR0, offsetof(struct lppaca, saved_srr0));
DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1));
DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int));
DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int));
/* RTAS */
DEFINE(RTASBASE, offsetof(struct rtas_t, base));
DEFINE(RTASENTRY, offsetof(struct rtas_t, entry));
/* Interrupt register frame */
DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
DEFINE(SWITCH_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
/* 288 = # of volatile regs, int & fp, for leaf routines */
/* which do not stack a frame. See the PPC64 ABI. */
DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 288);
/* Create extra stack space for SRR0 and SRR1 when calling prom/rtas. */
DEFINE(PROM_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 16);
DEFINE(RTAS_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 16);
DEFINE(GPR0, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[0]));
DEFINE(GPR1, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[1]));
DEFINE(GPR2, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[2]));
DEFINE(GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[3]));
DEFINE(GPR4, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[4]));
DEFINE(GPR5, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[5]));
DEFINE(GPR6, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[6]));
DEFINE(GPR7, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[7]));
DEFINE(GPR8, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[8]));
DEFINE(GPR9, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[9]));
DEFINE(GPR10, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[10]));
DEFINE(GPR11, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[11]));
DEFINE(GPR12, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[12]));
DEFINE(GPR13, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[13]));
/*
* Note: these symbols include _ because they overlap with special
* register names
*/
DEFINE(_NIP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, nip));
DEFINE(_MSR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, msr));
DEFINE(_CTR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ctr));
DEFINE(_LINK, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, link));
DEFINE(_CCR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ccr));
DEFINE(_XER, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, xer));
DEFINE(_DAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
DEFINE(_DSISR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
DEFINE(ORIG_GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, orig_gpr3));
DEFINE(RESULT, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, result));
DEFINE(_TRAP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, trap));
DEFINE(SOFTE, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, softe));
/* These _only_ to be used with {PROM,RTAS}_FRAME_SIZE!!! */
DEFINE(_SRR0, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs));
DEFINE(_SRR1, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs)+8);
DEFINE(CLONE_VM, CLONE_VM);
DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
/* About the CPU features table */
DEFINE(CPU_SPEC_ENTRY_SIZE, sizeof(struct cpu_spec));
DEFINE(CPU_SPEC_PVR_MASK, offsetof(struct cpu_spec, pvr_mask));
DEFINE(CPU_SPEC_PVR_VALUE, offsetof(struct cpu_spec, pvr_value));
DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
/* systemcfg offsets for use by vdso */
DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct systemcfg, tb_orig_stamp));
DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct systemcfg, tb_ticks_per_sec));
DEFINE(CFG_TB_TO_XS, offsetof(struct systemcfg, tb_to_xs));
DEFINE(CFG_STAMP_XSEC, offsetof(struct systemcfg, stamp_xsec));
DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct systemcfg, tb_update_count));
DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct systemcfg, tz_minuteswest));
DEFINE(CFG_TZ_DSTTIME, offsetof(struct systemcfg, tz_dsttime));
DEFINE(CFG_SYSCALL_MAP32, offsetof(struct systemcfg, syscall_map_32));
DEFINE(CFG_SYSCALL_MAP64, offsetof(struct systemcfg, syscall_map_64));
/* timeval/timezone offsets for use by vdso */
DEFINE(TVAL64_TV_SEC, offsetof(struct timeval, tv_sec));
DEFINE(TVAL64_TV_USEC, offsetof(struct timeval, tv_usec));
DEFINE(TVAL32_TV_SEC, offsetof(struct compat_timeval, tv_sec));
DEFINE(TVAL32_TV_USEC, offsetof(struct compat_timeval, tv_usec));
DEFINE(TZONE_TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
DEFINE(TZONE_TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
return 0;
}
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