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[PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel 

This patch moves the vdso's to arch/powerpc, adds support for the 32
bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds
some new (still untested) routines to both vdso's: clock_gettime() with
support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same
clocks) and get_tbfreq() for glibc to retreive the timebase frequency.

Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits
returns a long long (r3, r4) not a long. This is such that if we ever
add support for >4Ghz timebases on ppc32, the userland interface won't
have to change.

I have tested gettimeofday() using some glibc patches in both ppc32 and
ppc64 kernels using 32 bits userland (I haven't had a chance to test a
64 bits userland yet, but the implementation didn't change and was
tested earlier). I haven't tested yet the new functions.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2005-11-11 21:15:21 +11:00 committed by Paul Mackerras
parent 6761c4a073
commit a7f290dad3
41 changed files with 1541 additions and 430 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/kernel/Makefile
View File

@ -12,11 +12,13 @@ CFLAGS_btext.o += -fPIC
endif
obj-y := semaphore.o cputable.o ptrace.o syscalls.o \
irq.o signal_32.o pmc.o
irq.o signal_32.o pmc.o vdso.o
obj-y += vdso32/
obj-$(CONFIG_PPC64) += setup_64.o binfmt_elf32.o sys_ppc32.o \
signal_64.o ptrace32.o systbl.o \
paca.o ioctl32.o cpu_setup_power4.o \
firmware.o sysfs.o udbg.o
obj-$(CONFIG_PPC64) += vdso64/
obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_POWER4) += idle_power4.o
obj-$(CONFIG_PPC_OF) += of_device.o

45
arch/powerpc/kernel/asm-offsets.c
View File

@ -37,12 +37,12 @@
#include <asm/cputable.h>
#include <asm/thread_info.h>
#include <asm/rtas.h>
#include <asm/vdso_datapage.h>
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#include <asm/lppaca.h>
#include <asm/iseries/hv_lp_event.h>
#include <asm/cache.h>
#include <asm/systemcfg.h>
#include <asm/compat.h>
#endif
@ -251,25 +251,42 @@ int main(void)
DEFINE(TASK_SIZE, TASK_SIZE);
DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);
#else /* CONFIG_PPC64 */
/* 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));
#endif /* ! CONFIG_PPC64 */
/* timeval/timezone offsets for use by vdso */
/* datapage offsets for use by vdso */
DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct vdso_data, tb_orig_stamp));
DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct vdso_data, tb_ticks_per_sec));
DEFINE(CFG_TB_TO_XS, offsetof(struct vdso_data, tb_to_xs));
DEFINE(CFG_STAMP_XSEC, offsetof(struct vdso_data, stamp_xsec));
DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct vdso_data, tb_update_count));
DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct vdso_data, tz_minuteswest));
DEFINE(CFG_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime));
DEFINE(CFG_SYSCALL_MAP32, offsetof(struct vdso_data, syscall_map_32));
DEFINE(WTOM_CLOCK_SEC, offsetof(struct vdso_data, wtom_clock_sec));
DEFINE(WTOM_CLOCK_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));
#ifdef CONFIG_PPC64
DEFINE(CFG_SYSCALL_MAP64, offsetof(struct vdso_data, syscall_map_64));
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(TSPC32_TV_SEC, offsetof(struct compat_timespec, tv_sec));
DEFINE(TSPC32_TV_NSEC, offsetof(struct compat_timespec, tv_nsec));
#else
DEFINE(TVAL32_TV_SEC, offsetof(struct timeval, tv_sec));
DEFINE(TVAL32_TV_USEC, offsetof(struct timeval, tv_usec));
DEFINE(TSPEC32_TV_SEC, offsetof(struct timespec, tv_sec));
DEFINE(TSPEC32_TV_NSEC, offsetof(struct timespec, tv_nsec));
#endif
/* timeval/timezone offsets for use by vdso */
DEFINE(TZONE_TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
DEFINE(TZONE_TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
#endif /* CONFIG_PPC64 */
/* Other bits used by the vdso */
DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
DEFINE(CLOCK_REALTIME_RES, TICK_NSEC);
return 0;
}

7
arch/powerpc/kernel/paca.c
View File

@ -15,17 +15,10 @@
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/page.h>
#include <asm/systemcfg.h>
#include <asm/lppaca.h>
#include <asm/iseries/it_lp_queue.h>
#include <asm/paca.h>
static union {
struct systemcfg data;
u8 page[PAGE_SIZE];
} systemcfg_store __attribute__((__section__(".data.page.aligned")));
struct systemcfg *_systemcfg = &systemcfg_store.data;
/* This symbol is provided by the linker - let it fill in the paca
* field correctly */

4
arch/powerpc/kernel/proc_ppc64.c
View File

@ -23,7 +23,7 @@
#include <linux/slab.h>
#include <linux/kernel.h>
#include <asm/systemcfg.h>
#include <asm/vdso_datapage.h>
#include <asm/rtas.h>
#include <asm/uaccess.h>
#include <asm/prom.h>
@ -72,7 +72,7 @@ static int __init proc_ppc64_init(void)
if (!pde)
return 1;
pde->nlink = 1;
pde->data = _systemcfg;
pde->data = vdso_data;
pde->size = PAGE_SIZE;
pde->proc_fops = &page_map_fops;

1
arch/powerpc/kernel/rtas-proc.c
View File

@ -32,7 +32,6 @@
#include <asm/rtas.h>
#include <asm/machdep.h> /* for ppc_md */
#include <asm/time.h>
#include <asm/systemcfg.h>
/* Token for Sensors */
#define KEY_SWITCH 0x0001

4
arch/powerpc/kernel/setup-common.c
View File

@ -33,7 +33,7 @@
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/processor.h>
#include <asm/systemcfg.h>
#include <asm/vdso_datapage.h>
#include <asm/pgtable.h>
#include <asm/smp.h>
#include <asm/elf.h>
@ -564,7 +564,7 @@ void __init smp_setup_cpu_maps(void)
cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
}
_systemcfg->processorCount = num_present_cpus();
vdso_data->processorCount = num_present_cpus();
#endif /* CONFIG_PPC64 */
}
#endif /* CONFIG_SMP */

62
arch/powerpc/kernel/setup_64.c
View File

@ -57,7 +57,6 @@
#include <asm/lmb.h>
#include <asm/iseries/it_lp_naca.h>
#include <asm/firmware.h>
#include <asm/systemcfg.h>
#include <asm/xmon.h>
#include <asm/udbg.h>
@ -375,9 +374,8 @@ static void __init initialize_cache_info(void)
DBG("Argh, can't find dcache properties ! "
"sizep: %p, lsizep: %p\n", sizep, lsizep);
_systemcfg->dcache_size = ppc64_caches.dsize = size;
_systemcfg->dcache_line_size =
ppc64_caches.dline_size = lsize;
ppc64_caches.dsize = size;
ppc64_caches.dline_size = lsize;
ppc64_caches.log_dline_size = __ilog2(lsize);
ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
@ -393,22 +391,13 @@ static void __init initialize_cache_info(void)
DBG("Argh, can't find icache properties ! "
"sizep: %p, lsizep: %p\n", sizep, lsizep);
_systemcfg->icache_size = ppc64_caches.isize = size;
_systemcfg->icache_line_size =
ppc64_caches.iline_size = lsize;
ppc64_caches.isize = size;
ppc64_caches.iline_size = lsize;
ppc64_caches.log_iline_size = __ilog2(lsize);
ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
}
}
/* Add an eye catcher and the systemcfg layout version number */
strcpy(_systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
_systemcfg->version.major = SYSTEMCFG_MAJOR;
_systemcfg->version.minor = SYSTEMCFG_MINOR;
_systemcfg->processor = mfspr(SPRN_PVR);
_systemcfg->platform = _machine;
_systemcfg->physicalMemorySize = lmb_phys_mem_size();
DBG(" <- initialize_cache_info()\n");
}
@ -495,15 +484,14 @@ void __init setup_system(void)
printk("-----------------------------------------------------\n");
printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size);
printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller);
printk("systemcfg = 0x%p\n", _systemcfg);
printk("systemcfg->platform = 0x%x\n", _systemcfg->platform);
printk("systemcfg->processorCount = 0x%lx\n", _systemcfg->processorCount);
printk("systemcfg->physicalMemorySize = 0x%lx\n", _systemcfg->physicalMemorySize);
printk("ppc64_interrupt_controller = 0x%ld\n",
ppc64_interrupt_controller);
printk("platform = 0x%x\n", _machine);
printk("physicalMemorySize = 0x%lx\n", lmb_phys_mem_size());
printk("ppc64_caches.dcache_line_size = 0x%x\n",
ppc64_caches.dline_size);
ppc64_caches.dline_size);
printk("ppc64_caches.icache_line_size = 0x%x\n",
ppc64_caches.iline_size);
ppc64_caches.iline_size);
printk("htab_address = 0x%p\n", htab_address);
printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
printk("-----------------------------------------------------\n");
@ -567,33 +555,6 @@ static void __init emergency_stack_init(void)
__va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE;
}
/*
* Called from setup_arch to initialize the bitmap of available
* syscalls in the systemcfg page
*/
void __init setup_syscall_map(void)
{
unsigned int i, count64 = 0, count32 = 0;
extern unsigned long *sys_call_table;
extern unsigned long sys_ni_syscall;
for (i = 0; i < __NR_syscalls; i++) {
if (sys_call_table[i*2] != sys_ni_syscall) {
count64++;
_systemcfg->syscall_map_64[i >> 5] |=
0x80000000UL >> (i & 0x1f);
}
if (sys_call_table[i*2+1] != sys_ni_syscall) {
count32++;
_systemcfg->syscall_map_32[i >> 5] |=
0x80000000UL >> (i & 0x1f);
}
}
printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n",
count32, count64);
}
/*
* Called into from start_kernel, after lock_kernel has been called.
* Initializes bootmem, which is unsed to manage page allocation until
@ -635,9 +596,6 @@ void __init setup_arch(char **cmdline_p)
do_init_bootmem();
sparse_init();
/* initialize the syscall map in systemcfg */
setup_syscall_map();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif

12
arch/powerpc/kernel/signal_32.c
View File

@ -43,10 +43,10 @@
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/sigcontext.h>
#include <asm/vdso.h>
#ifdef CONFIG_PPC64
#include "ppc32.h"
#include <asm/unistd.h>
#include <asm/vdso.h>
#else
#include <asm/ucontext.h>
#include <asm/pgtable.h>
@ -809,14 +809,11 @@ static int handle_rt_signal(unsigned long sig, struct k_sigaction *ka,
/* Save user registers on the stack */
frame = &rt_sf->uc.uc_mcontext;
#ifdef CONFIG_PPC64
if (vdso32_rt_sigtramp && current->thread.vdso_base) {
if (save_user_regs(regs, frame, 0))
goto badframe;
regs->link = current->thread.vdso_base + vdso32_rt_sigtramp;
} else
#endif
{
} else {
if (save_user_regs(regs, frame, __NR_rt_sigreturn))
goto badframe;
regs->link = (unsigned long) frame->tramp;
@ -1090,14 +1087,11 @@ static int handle_signal(unsigned long sig, struct k_sigaction *ka,
|| __put_user(sig, &sc->signal))
goto badframe;
#ifdef CONFIG_PPC64
if (vdso32_sigtramp && current->thread.vdso_base) {
if (save_user_regs(regs, &frame->mctx, 0))
goto badframe;
regs->link = current->thread.vdso_base + vdso32_sigtramp;
} else
#endif
{
} else {
if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
goto badframe;
regs->link = (unsigned long) frame->mctx.tramp;

4
arch/powerpc/kernel/smp.c
View File

@ -44,7 +44,7 @@
#include <asm/cputable.h>
#include <asm/system.h>
#include <asm/mpic.h>
#include <asm/systemcfg.h>
#include <asm/vdso_datapage.h>
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#endif
@ -371,7 +371,7 @@ int generic_cpu_disable(void)
cpu_clear(cpu, cpu_online_map);
#ifdef CONFIG_PPC64
_systemcfg->processorCount--;
vdso_data->processorCount--;
fixup_irqs(cpu_online_map);
#endif
return 0;

1
arch/powerpc/kernel/sysfs.c
View File

@ -16,7 +16,6 @@
#include <asm/firmware.h>
#include <asm/hvcall.h>
#include <asm/prom.h>
#include <asm/systemcfg.h>
#include <asm/paca.h>
#include <asm/lppaca.h>
#include <asm/machdep.h>

40
arch/powerpc/kernel/time.c
View File

@ -62,8 +62,8 @@
#include <asm/irq.h>
#include <asm/div64.h>
#include <asm/smp.h>
#include <asm/vdso_datapage.h>
#ifdef CONFIG_PPC64
#include <asm/systemcfg.h>
#include <asm/firmware.h>
#endif
#ifdef CONFIG_PPC_ISERIES
@ -261,7 +261,6 @@ static inline void update_gtod(u64 new_tb_stamp, u64 new_stamp_xsec,
do_gtod.varp = temp_varp;
do_gtod.var_idx = temp_idx;
#ifdef CONFIG_PPC64
/*
* tb_update_count is used to allow the userspace gettimeofday code
* to assure itself that it sees a consistent view of the tb_to_xs and
@ -271,14 +270,15 @@ static inline void update_gtod(u64 new_tb_stamp, u64 new_stamp_xsec,
* tb_to_xs and stamp_xsec values are consistent. If not, then it
* loops back and reads them again until this criteria is met.
*/
++(_systemcfg->tb_update_count);
++(vdso_data->tb_update_count);
smp_wmb();
_systemcfg->tb_orig_stamp = new_tb_stamp;
_systemcfg->stamp_xsec = new_stamp_xsec;
_systemcfg->tb_to_xs = new_tb_to_xs;
vdso_data->tb_orig_stamp = new_tb_stamp;
vdso_data->stamp_xsec = new_stamp_xsec;
vdso_data->tb_to_xs = new_tb_to_xs;
vdso_data->wtom_clock_sec = wall_to_monotonic.tv_sec;
vdso_data->wtom_clock_nsec = wall_to_monotonic.tv_nsec;
smp_wmb();
++(_systemcfg->tb_update_count);
#endif
++(vdso_data->tb_update_count);
}
/*
@ -357,9 +357,8 @@ static void iSeries_tb_recal(void)
do_gtod.tb_ticks_per_sec = tb_ticks_per_sec;
tb_to_xs = divres.result_low;
do_gtod.varp->tb_to_xs = tb_to_xs;
_systemcfg->tb_ticks_per_sec =
tb_ticks_per_sec;
_systemcfg->tb_to_xs = tb_to_xs;
vdso_data->tb_ticks_per_sec = tb_ticks_per_sec;
vdso_data->tb_to_xs = tb_to_xs;
}
else {
printk( "Titan recalibrate: FAILED (difference > 4 percent)\n"
@ -561,10 +560,8 @@ int do_settimeofday(struct timespec *tv)
new_xsec += (u64)new_sec * XSEC_PER_SEC - tb_delta_xs;
update_gtod(tb_last_jiffy, new_xsec, do_gtod.varp->tb_to_xs);
#ifdef CONFIG_PPC64
_systemcfg->tz_minuteswest = sys_tz.tz_minuteswest;
_systemcfg->tz_dsttime = sys_tz.tz_dsttime;
#endif
vdso_data->tz_minuteswest = sys_tz.tz_minuteswest;
vdso_data->tz_dsttime = sys_tz.tz_dsttime;
write_sequnlock_irqrestore(&xtime_lock, flags);
clock_was_set();
@ -713,13 +710,12 @@ void __init time_init(void)
do_gtod.tb_ticks_per_sec = tb_ticks_per_sec;
do_gtod.varp->tb_to_xs = tb_to_xs;
do_gtod.tb_to_us = tb_to_us;
#ifdef CONFIG_PPC64
_systemcfg->tb_orig_stamp = tb_last_jiffy;
_systemcfg->tb_update_count = 0;
_systemcfg->tb_ticks_per_sec = tb_ticks_per_sec;
_systemcfg->stamp_xsec = xtime.tv_sec * XSEC_PER_SEC;
_systemcfg->tb_to_xs = tb_to_xs;
#endif
vdso_data->tb_orig_stamp = tb_last_jiffy;
vdso_data->tb_update_count = 0;
vdso_data->tb_ticks_per_sec = tb_ticks_per_sec;
vdso_data->stamp_xsec = xtime.tv_sec * XSEC_PER_SEC;
vdso_data->tb_to_xs = tb_to_xs;
time_freq = 0;

1
arch/powerpc/kernel/traps.c
View File

@ -49,7 +49,6 @@
#ifdef CONFIG_PPC64
#include <asm/firmware.h>
#include <asm/processor.h>
#include <asm/systemcfg.h>
#endif
#ifdef CONFIG_PPC64 /* XXX */

746
arch/powerpc/kernel/vdso.c Normal file
View File

@ -0,0 +1,746 @@
/*
* linux/arch/ppc64/kernel/vdso.c
*
* Copyright (C) 2004 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
*
* 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/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/elf.h>
#include <linux/security.h>
#include <linux/bootmem.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/mmu_context.h>
#include <asm/lmb.h>
#include <asm/machdep.h>
#include <asm/cputable.h>
#include <asm/sections.h>
#include <asm/vdso.h>
#include <asm/vdso_datapage.h>
#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) printk(fmt)
#else
#define DBG(fmt...)
#endif
/* Max supported size for symbol names */
#define MAX_SYMNAME 64
extern char vdso32_start, vdso32_end;
static void *vdso32_kbase = &vdso32_start;
unsigned int vdso32_pages;
unsigned long vdso32_sigtramp;
unsigned long vdso32_rt_sigtramp;
#ifdef CONFIG_PPC64
extern char vdso64_start, vdso64_end;
static void *vdso64_kbase = &vdso64_start;
unsigned int vdso64_pages;
unsigned long vdso64_rt_sigtramp;
#endif /* CONFIG_PPC64 */
/*
* The vdso data page (aka. systemcfg for old ppc64 fans) is here.
* Once the early boot kernel code no longer needs to muck around
* with it, it will become dynamically allocated
*/
static union {
struct vdso_data data;
u8 page[PAGE_SIZE];
} vdso_data_store __attribute__((__section__(".data.page_aligned")));
struct vdso_data *vdso_data = &vdso_data_store.data;
/* Format of the patch table */
struct vdso_patch_def
{
unsigned long ftr_mask, ftr_value;
const char *gen_name;
const char *fix_name;
};
/* Table of functions to patch based on the CPU type/revision
*
* Currently, we only change sync_dicache to do nothing on processors
* with a coherent icache
*/
static struct vdso_patch_def vdso_patches[] = {
{
CPU_FTR_COHERENT_ICACHE, CPU_FTR_COHERENT_ICACHE,
"__kernel_sync_dicache", "__kernel_sync_dicache_p5"
},
{
CPU_FTR_USE_TB, 0,
"__kernel_gettimeofday", NULL
},
};
/*
* Some infos carried around for each of them during parsing at
* boot time.
*/
struct lib32_elfinfo
{
Elf32_Ehdr *hdr; /* ptr to ELF */
Elf32_Sym *dynsym; /* ptr to .dynsym section */
unsigned long dynsymsize; /* size of .dynsym section */
char *dynstr; /* ptr to .dynstr section */
unsigned long text; /* offset of .text section in .so */
};
struct lib64_elfinfo
{
Elf64_Ehdr *hdr;
Elf64_Sym *dynsym;
unsigned long dynsymsize;
char *dynstr;
unsigned long text;
};
#ifdef __DEBUG
static void dump_one_vdso_page(struct page *pg, struct page *upg)
{
printk("kpg: %p (c:%d,f:%08lx)", __va(page_to_pfn(pg) << PAGE_SHIFT),
page_count(pg),
pg->flags);
if (upg/* && pg != upg*/) {
printk(" upg: %p (c:%d,f:%08lx)", __va(page_to_pfn(upg)
<< PAGE_SHIFT),
page_count(upg),
upg->flags);
}
printk("\n");
}
static void dump_vdso_pages(struct vm_area_struct * vma)
{
int i;
if (!vma || test_thread_flag(TIF_32BIT)) {
printk("vDSO32 @ %016lx:\n", (unsigned long)vdso32_kbase);
for (i=0; i<vdso32_pages; i++) {
struct page *pg = virt_to_page(vdso32_kbase +
i*PAGE_SIZE);
struct page *upg = (vma && vma->vm_mm) ?
follow_page(vma->vm_mm, vma->vm_start +
i*PAGE_SIZE, 0)
: NULL;
dump_one_vdso_page(pg, upg);
}
}
if (!vma || !test_thread_flag(TIF_32BIT)) {
printk("vDSO64 @ %016lx:\n", (unsigned long)vdso64_kbase);
for (i=0; i<vdso64_pages; i++) {
struct page *pg = virt_to_page(vdso64_kbase +
i*PAGE_SIZE);
struct page *upg = (vma && vma->vm_mm) ?
follow_page(vma->vm_mm, vma->vm_start +
i*PAGE_SIZE, 0)
: NULL;
dump_one_vdso_page(pg, upg);
}
}
}
#endif /* DEBUG */
/*
* Keep a dummy vma_close for now, it will prevent VMA merging.
*/
static void vdso_vma_close(struct vm_area_struct * vma)
{
}
/*
* Our nopage() function, maps in the actual vDSO kernel pages, they will
* be mapped read-only by do_no_page(), and eventually COW'ed, either
* right away for an initial write access, or by do_wp_page().
*/
static struct page * vdso_vma_nopage(struct vm_area_struct * vma,
unsigned long address, int *type)
{
unsigned long offset = address - vma->vm_start;
struct page *pg;
#ifdef CONFIG_PPC64
void *vbase = test_thread_flag(TIF_32BIT) ?
vdso32_kbase : vdso64_kbase;
#else
void *vbase = vdso32_kbase;
#endif
DBG("vdso_vma_nopage(current: %s, address: %016lx, off: %lx)\n",
current->comm, address, offset);
if (address < vma->vm_start || address > vma->vm_end)
return NOPAGE_SIGBUS;
/*
* Last page is systemcfg.
*/
if ((vma->vm_end - address) <= PAGE_SIZE)
pg = virt_to_page(vdso_data);
else
pg = virt_to_page(vbase + offset);
get_page(pg);
DBG(" ->page count: %d\n", page_count(pg));
return pg;
}
static struct vm_operations_struct vdso_vmops = {
.close = vdso_vma_close,
.nopage = vdso_vma_nopage,
};
/*
* This is called from binfmt_elf, we create the special vma for the
* vDSO and insert it into the mm struct tree
*/
int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
unsigned long vdso_pages;
unsigned long vdso_base;
#ifdef CONFIG_PPC64
if (test_thread_flag(TIF_32BIT)) {
vdso_pages = vdso32_pages;
vdso_base = VDSO32_MBASE;
} else {
vdso_pages = vdso64_pages;
vdso_base = VDSO64_MBASE;
}
#else
vdso_pages = vdso32_pages;
vdso_base = VDSO32_MBASE;
#endif
current->thread.vdso_base = 0;
/* vDSO has a problem and was disabled, just don't "enable" it for the
* process
*/
if (vdso_pages == 0)
return 0;
vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
if (vma == NULL)
return -ENOMEM;
memset(vma, 0, sizeof(*vma));
/* Add a page to the vdso size for the data page */
vdso_pages ++;
/*
* pick a base address for the vDSO in process space. We try to put it
* at vdso_base which is the "natural" base for it, but we might fail
* and end up putting it elsewhere.
*/
vdso_base = get_unmapped_area(NULL, vdso_base,
vdso_pages << PAGE_SHIFT, 0, 0);
if (vdso_base & ~PAGE_MASK) {
kmem_cache_free(vm_area_cachep, vma);
return (int)vdso_base;
}
current->thread.vdso_base = vdso_base;
vma->vm_mm = mm;
vma->vm_start = current->thread.vdso_base;
vma->vm_end = vma->vm_start + (vdso_pages << PAGE_SHIFT);
/*
* our vma flags don't have VM_WRITE so by default, the process isn't
* allowed to write those pages.
* gdb can break that with ptrace interface, and thus trigger COW on
* those pages but it's then your responsibility to never do that on
* the "data" page of the vDSO or you'll stop getting kernel updates
* and your nice userland gettimeofday will be totally dead.
* It's fine to use that for setting breakpoints in the vDSO code
* pages though
*/
vma->vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE |
VM_MAYEXEC | VM_RESERVED;
vma->vm_flags |= mm->def_flags;
vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
vma->vm_ops = &vdso_vmops;
down_write(&mm->mmap_sem);
if (insert_vm_struct(mm, vma)) {
up_write(&mm->mmap_sem);
kmem_cache_free(vm_area_cachep, vma);
return -ENOMEM;
}
mm->total_vm += (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
up_write(&mm->mmap_sem);
return 0;
}
static void * __init find_section32(Elf32_Ehdr *ehdr, const char *secname,
unsigned long *size)
{
Elf32_Shdr *sechdrs;
unsigned int i;
char *secnames;
/* Grab section headers and strings so we can tell who is who */
sechdrs = (void *)ehdr + ehdr->e_shoff;
secnames = (void *)ehdr + sechdrs[ehdr->e_shstrndx].sh_offset;
/* Find the section they want */
for (i = 1; i < ehdr->e_shnum; i++) {
if (strcmp(secnames+sechdrs[i].sh_name, secname) == 0) {
if (size)
*size = sechdrs[i].sh_size;
return (void *)ehdr + sechdrs[i].sh_offset;
}
}
*size = 0;
return NULL;
}
static Elf32_Sym * __init find_symbol32(struct lib32_elfinfo *lib,
const char *symname)
{
unsigned int i;
char name[MAX_SYMNAME], *c;
for (i = 0; i < (lib->dynsymsize / sizeof(Elf32_Sym)); i++) {
if (lib->dynsym[i].st_name == 0)
continue;
strlcpy(name, lib->dynstr + lib->dynsym[i].st_name,
MAX_SYMNAME);
c = strchr(name, '@');
if (c)
*c = 0;
if (strcmp(symname, name) == 0)
return &lib->dynsym[i];
}
return NULL;
}
/* Note that we assume the section is .text and the symbol is relative to
* the library base
*/
static unsigned long __init find_function32(struct lib32_elfinfo *lib,
const char *symname)
{
Elf32_Sym *sym = find_symbol32(lib, symname);
if (sym == NULL) {
printk(KERN_WARNING "vDSO32: function %s not found !\n",
symname);
return 0;
}
return sym->st_value - VDSO32_LBASE;
}
static int vdso_do_func_patch32(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64,
const char *orig, const char *fix)
{
Elf32_Sym *sym32_gen, *sym32_fix;
sym32_gen = find_symbol32(v32, orig);
if (sym32_gen == NULL) {
printk(KERN_ERR "vDSO32: Can't find symbol %s !\n", orig);
return -1;
}
if (fix == NULL) {
sym32_gen->st_name = 0;
return 0;
}
sym32_fix = find_symbol32(v32, fix);
if (sym32_fix == NULL) {
printk(KERN_ERR "vDSO32: Can't find symbol %s !\n", fix);
return -1;
}
sym32_gen->st_value = sym32_fix->st_value;
sym32_gen->st_size = sym32_fix->st_size;
sym32_gen->st_info = sym32_fix->st_info;
sym32_gen->st_other = sym32_fix->st_other;
sym32_gen->st_shndx = sym32_fix->st_shndx;
return 0;
}
#ifdef CONFIG_PPC64
static void * __init find_section64(Elf64_Ehdr *ehdr, const char *secname,
unsigned long *size)
{
Elf64_Shdr *sechdrs;
unsigned int i;
char *secnames;
/* Grab section headers and strings so we can tell who is who */
sechdrs = (void *)ehdr + ehdr->e_shoff;
secnames = (void *)ehdr + sechdrs[ehdr->e_shstrndx].sh_offset;
/* Find the section they want */
for (i = 1; i < ehdr->e_shnum; i++) {
if (strcmp(secnames+sechdrs[i].sh_name, secname) == 0) {
if (size)
*size = sechdrs[i].sh_size;
return (void *)ehdr + sechdrs[i].sh_offset;
}
}
if (size)
*size = 0;
return NULL;
}
static Elf64_Sym * __init find_symbol64(struct lib64_elfinfo *lib,
const char *symname)
{
unsigned int i;
char name[MAX_SYMNAME], *c;
for (i = 0; i < (lib->dynsymsize / sizeof(Elf64_Sym)); i++) {
if (lib->dynsym[i].st_name == 0)
continue;
strlcpy(name, lib->dynstr + lib->dynsym[i].st_name,
MAX_SYMNAME);
c = strchr(name, '@');
if (c)
*c = 0;
if (strcmp(symname, name) == 0)
return &lib->dynsym[i];
}
return NULL;
}
/* Note that we assume the section is .text and the symbol is relative to
* the library base
*/
static unsigned long __init find_function64(struct lib64_elfinfo *lib,
const char *symname)
{
Elf64_Sym *sym = find_symbol64(lib, symname);
if (sym == NULL) {
printk(KERN_WARNING "vDSO64: function %s not found !\n",
symname);
return 0;
}
#ifdef VDS64_HAS_DESCRIPTORS
return *((u64 *)(vdso64_kbase + sym->st_value - VDSO64_LBASE)) -
VDSO64_LBASE;
#else
return sym->st_value - VDSO64_LBASE;
#endif
}
static int vdso_do_func_patch64(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64,
const char *orig, const char *fix)
{
Elf64_Sym *sym64_gen, *sym64_fix;
sym64_gen = find_symbol64(v64, orig);
if (sym64_gen == NULL) {
printk(KERN_ERR "vDSO64: Can't find symbol %s !\n", orig);
return -1;
}
if (fix == NULL) {
sym64_gen->st_name = 0;
return 0;
}
sym64_fix = find_symbol64(v64, fix);
if (sym64_fix == NULL) {
printk(KERN_ERR "vDSO64: Can't find symbol %s !\n", fix);
return -1;
}
sym64_gen->st_value = sym64_fix->st_value;
sym64_gen->st_size = sym64_fix->st_size;
sym64_gen->st_info = sym64_fix->st_info;
sym64_gen->st_other = sym64_fix->st_other;
sym64_gen->st_shndx = sym64_fix->st_shndx;
return 0;
}
#endif /* CONFIG_PPC64 */
static __init int vdso_do_find_sections(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64)
{
void *sect;
/*
* Locate symbol tables & text section
*/
v32->dynsym = find_section32(v32->hdr, ".dynsym", &v32->dynsymsize);
v32->dynstr = find_section32(v32->hdr, ".dynstr", NULL);
if (v32->dynsym == NULL || v32->dynstr == NULL) {
printk(KERN_ERR "vDSO32: required symbol section not found\n");
return -1;
}
sect = find_section32(v32->hdr, ".text", NULL);
if (sect == NULL) {
printk(KERN_ERR "vDSO32: the .text section was not found\n");
return -1;
}
v32->text = sect - vdso32_kbase;
#ifdef CONFIG_PPC64
v64->dynsym = find_section64(v64->hdr, ".dynsym", &v64->dynsymsize);
v64->dynstr = find_section64(v64->hdr, ".dynstr", NULL);
if (v64->dynsym == NULL || v64->dynstr == NULL) {
printk(KERN_ERR "vDSO64: required symbol section not found\n");
return -1;
}
sect = find_section64(v64->hdr, ".text", NULL);
if (sect == NULL) {
printk(KERN_ERR "vDSO64: the .text section was not found\n");
return -1;
}
v64->text = sect - vdso64_kbase;
#endif /* CONFIG_PPC64 */
return 0;
}
static __init void vdso_setup_trampolines(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64)
{
/*
* Find signal trampolines
*/
#ifdef CONFIG_PPC64
vdso64_rt_sigtramp = find_function64(v64, "__kernel_sigtramp_rt64");
#endif
vdso32_sigtramp = find_function32(v32, "__kernel_sigtramp32");
vdso32_rt_sigtramp = find_function32(v32, "__kernel_sigtramp_rt32");
}
static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64)
{
Elf32_Sym *sym32;
#ifdef CONFIG_PPC64
Elf64_Sym *sym64;
sym64 = find_symbol64(v64, "__kernel_datapage_offset");
if (sym64 == NULL) {
printk(KERN_ERR "vDSO64: Can't find symbol "
"__kernel_datapage_offset !\n");
return -1;
}
*((int *)(vdso64_kbase + sym64->st_value - VDSO64_LBASE)) =
(vdso64_pages << PAGE_SHIFT) -
(sym64->st_value - VDSO64_LBASE);
#endif /* CONFIG_PPC64 */
sym32 = find_symbol32(v32, "__kernel_datapage_offset");
if (sym32 == NULL) {
printk(KERN_ERR "vDSO32: Can't find symbol "
"__kernel_datapage_offset !\n");
return -1;
}
*((int *)(vdso32_kbase + (sym32->st_value - VDSO32_LBASE))) =
(vdso32_pages << PAGE_SHIFT) -
(sym32->st_value - VDSO32_LBASE);
return 0;
}
static __init int vdso_fixup_alt_funcs(struct lib32_elfinfo *v32,
struct lib64_elfinfo *v64)
{
int i;
for (i = 0; i < ARRAY_SIZE(vdso_patches); i++) {
struct vdso_patch_def *patch = &vdso_patches[i];
int match = (cur_cpu_spec->cpu_features & patch->ftr_mask)
== patch->ftr_value;
if (!match)
continue;
DBG("replacing %s with %s...\n", patch->gen_name,
patch->fix_name ? "NONE" : patch->fix_name);
/*
* Patch the 32 bits and 64 bits symbols. Note that we do not
* patch the "." symbol on 64 bits.
* It would be easy to do, but doesn't seem to be necessary,
* patching the OPD symbol is enough.
*/
vdso_do_func_patch32(v32, v64, patch->gen_name,
patch->fix_name);
#ifdef CONFIG_PPC64
vdso_do_func_patch64(v32, v64, patch->gen_name,
patch->fix_name);
#endif /* CONFIG_PPC64 */
}
return 0;
}
static __init int vdso_setup(void)
{
struct lib32_elfinfo v32;
struct lib64_elfinfo v64;
v32.hdr = vdso32_kbase;
#ifdef CONFIG_PPC64
v64.hdr = vdso64_kbase;
#endif
if (vdso_do_find_sections(&v32, &v64))
return -1;
if (vdso_fixup_datapage(&v32, &v64))
return -1;
if (vdso_fixup_alt_funcs(&v32, &v64))
return -1;
vdso_setup_trampolines(&v32, &v64);
return 0;
}
/*
* Called from setup_arch to initialize the bitmap of available
* syscalls in the systemcfg page
*/
static void __init vdso_setup_syscall_map(void)
{
unsigned int i;
extern unsigned long *sys_call_table;
extern unsigned long sys_ni_syscall;
for (i = 0; i < __NR_syscalls; i++) {
#ifdef CONFIG_PPC64
if (sys_call_table[i*2] != sys_ni_syscall)
vdso_data->syscall_map_64[i >> 5] |=
0x80000000UL >> (i & 0x1f);
if (sys_call_table[i*2+1] != sys_ni_syscall)
vdso_data->syscall_map_32[i >> 5] |=
0x80000000UL >> (i & 0x1f);
#else /* CONFIG_PPC64 */
if (sys_call_table[i] != sys_ni_syscall)
vdso_data->syscall_map_32[i >> 5] |=
0x80000000UL >> (i & 0x1f);
#endif /* CONFIG_PPC64 */
}
}
void __init vdso_init(void)
{
int i;
#ifdef CONFIG_PPC64
/*
* Fill up the "systemcfg" stuff for backward compatiblity
*/
strcpy(vdso_data->eye_catcher, "SYSTEMCFG:PPC64");
vdso_data->version.major = SYSTEMCFG_MAJOR;
vdso_data->version.minor = SYSTEMCFG_MINOR;
vdso_data->processor = mfspr(SPRN_PVR);
vdso_data->platform = _machine;
vdso_data->physicalMemorySize = lmb_phys_mem_size();
vdso_data->dcache_size = ppc64_caches.dsize;
vdso_data->dcache_line_size = ppc64_caches.dline_size;
vdso_data->icache_size = ppc64_caches.isize;
vdso_data->icache_line_size = ppc64_caches.iline_size;
/*
* Calculate the size of the 64 bits vDSO
*/
vdso64_pages = (&vdso64_end - &vdso64_start) >> PAGE_SHIFT;
DBG("vdso64_kbase: %p, 0x%x pages\n", vdso64_kbase, vdso64_pages);
#endif /* CONFIG_PPC64 */
/*
* Calculate the size of the 32 bits vDSO
*/
vdso32_pages = (&vdso32_end - &vdso32_start) >> PAGE_SHIFT;
DBG("vdso32_kbase: %p, 0x%x pages\n", vdso32_kbase, vdso32_pages);
/*
* Setup the syscall map in the vDOS
*/
vdso_setup_syscall_map();
/*
* Initialize the vDSO images in memory, that is do necessary
* fixups of vDSO symbols, locate trampolines, etc...
*/
if (vdso_setup()) {
printk(KERN_ERR "vDSO setup failure, not enabled !\n");
vdso32_pages = 0;
#ifdef CONFIG_PPC64
vdso64_pages = 0;
#endif
return;
}
/* Make sure pages are in the correct state */
for (i = 0; i < vdso32_pages; i++) {
struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE);
ClearPageReserved(pg);
get_page(pg);
}
#ifdef CONFIG_PPC64
for (i = 0; i < vdso64_pages; i++) {
struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE);
ClearPageReserved(pg);
get_page(pg);
}
#endif /* CONFIG_PPC64 */
get_page(virt_to_page(vdso_data));
}
int in_gate_area_no_task(unsigned long addr)
{
return 0;
}
int in_gate_area(struct task_struct *task, unsigned long addr)
{
return 0;
}
struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
{
return NULL;
}

4
arch/ppc64/kernel/vdso32/Makefile → arch/powerpc/kernel/vdso32/Makefile
View File

@ -5,6 +5,10 @@ obj-vdso32 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o
# Build rules
ifeq ($(CONFIG_PPC32),y)
CROSS32CC := $(CC)
endif
targets := $(obj-vdso32) vdso32.so
obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))

0
arch/ppc64/kernel/vdso32/cacheflush.S → arch/powerpc/kernel/vdso32/cacheflush.S
View File

16
arch/ppc64/kernel/vdso32/datapage.S → arch/powerpc/kernel/vdso32/datapage.S
View File

@ -66,3 +66,19 @@ V_FUNCTION_BEGIN(__kernel_get_syscall_map)
blr
.cfi_endproc
V_FUNCTION_END(__kernel_get_syscall_map)
/*
* void unsigned long long __kernel_get_tbfreq(void);
*
* returns the timebase frequency in HZ
*/
V_FUNCTION_BEGIN(__kernel_get_tbfreq)
.cfi_startproc
mflr r12
.cfi_register lr,r12
bl __get_datapage@local
lwz r3,CFG_TB_TICKS_PER_SEC(r3)
lwz r4,(CFG_TB_TICKS_PER_SEC + 4)(r3)
mtlr r12
.cfi_endproc
V_FUNCTION_END(__kernel_get_tbfreq)

315
arch/powerpc/kernel/vdso32/gettimeofday.S Normal file
View File

@ -0,0 +1,315 @@
/*
* Userland implementation of gettimeofday() for 32 bits processes in a
* ppc64 kernel for use in the vDSO
*
* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org,
* IBM Corp.
*
* 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 <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
/*
* Exact prototype of gettimeofday
*
* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz);
*
*/
V_FUNCTION_BEGIN(__kernel_gettimeofday)
.cfi_startproc
mflr r12
.cfi_register lr,r12
mr r10,r3 /* r10 saves tv */
mr r11,r4 /* r11 saves tz */
bl __get_datapage@local /* get data page */
mr r9, r3 /* datapage ptr in r9 */
bl __do_get_xsec@local /* get xsec from tb & kernel */
bne- 2f /* out of line -> do syscall */
/* seconds are xsec >> 20 */
rlwinm r5,r4,12,20,31
rlwimi r5,r3,12,0,19
stw r5,TVAL32_TV_SEC(r10)
/* get remaining xsec and convert to usec. we scale
* up remaining xsec by 12 bits and get the top 32 bits
* of the multiplication
*/
rlwinm r5,r4,12,0,19
lis r6,1000000@h
ori r6,r6,1000000@l
mulhwu r5,r5,r6
stw r5,TVAL32_TV_USEC(r10)
cmpli cr0,r11,0 /* check if tz is NULL */
beq 1f
lwz r4,CFG_TZ_MINUTEWEST(r9)/* fill tz */
lwz r5,CFG_TZ_DSTTIME(r9)
stw r4,TZONE_TZ_MINWEST(r11)
stw r5,TZONE_TZ_DSTTIME(r11)
1: mtlr r12
li r3,0
blr
2:
mtlr r12
mr r3,r10
mr r4,r11
li r0,__NR_gettimeofday
sc
blr
.cfi_endproc
V_FUNCTION_END(__kernel_gettimeofday)
/*
* Exact prototype of clock_gettime()
*
* int __kernel_clock_gettime(clockid_t clock_id, struct timespec *tp);
*
*/
V_FUNCTION_BEGIN(__kernel_clock_gettime)
.cfi_startproc
/* Check for supported clock IDs */
cmpli cr0,r3,CLOCK_REALTIME
cmpli cr1,r3,CLOCK_MONOTONIC
cror cr0,cr0,cr1
bne cr0,99f
mflr r12 /* r12 saves lr */
.cfi_register lr,r12
mr r10,r3 /* r10 saves id */
mr r11,r4 /* r11 saves tp */
bl __get_datapage@local /* get data page */
mr r9, r3 /* datapage ptr in r9 */
beq cr1,50f /* if monotonic -> jump there */
/*
* CLOCK_REALTIME
*/
bl __do_get_xsec@local /* get xsec from tb & kernel */
bne- 98f /* out of line -> do syscall */
/* seconds are xsec >> 20 */
rlwinm r5,r4,12,20,31
rlwimi r5,r3,12,0,19
stw r5,TSPC32_TV_SEC(r11)
/* get remaining xsec and convert to nsec. we scale
* up remaining xsec by 12 bits and get the top 32 bits
* of the multiplication, then we multiply by 1000
*/
rlwinm r5,r4,12,0,19
lis r6,1000000@h
ori r6,r6,1000000@l
mulhwu r5,r5,r6
mulli r5,r5,1000
stw r5,TSPC32_TV_NSEC(r11)
mtlr r12
li r3,0
blr
/*
* CLOCK_MONOTONIC
*/
50: bl __do_get_xsec@local /* get xsec from tb & kernel */
bne- 98f /* out of line -> do syscall */
/* seconds are xsec >> 20 */
rlwinm r6,r4,12,20,31
rlwimi r6,r3,12,0,19
/* get remaining xsec and convert to nsec. we scale
* up remaining xsec by 12 bits and get the top 32 bits
* of the multiplication, then we multiply by 1000
*/
rlwinm r7,r4,12,0,19
lis r5,1000000@h
ori r5,r5,1000000@l
mulhwu r7,r7,r5
mulli r7,r7,1000
/* now we must fixup using wall to monotonic. We need to snapshot
* that value and do the counter trick again. Fortunately, we still
* have the counter value in r8 that was returned by __do_get_xsec.
* At this point, r6,r7 contain our sec/nsec values, r3,r4 and r5
* can be used
*/
lwz r3,WTOM_CLOCK_SEC(r9)
lwz r4,WTOM_CLOCK_NSEC(r9)
/* We now have our result in r3,r4. We create a fake dependency
* on that result and re-check the counter
*/
or r5,r4,r3
xor r0,r5,r5
add r9,r9,r0
#ifdef CONFIG_PPC64
lwz r0,(CFG_TB_UPDATE_COUNT+4)(r9)
#else
lwz r0,(CFG_TB_UPDATE_COUNT)(r9)
#endif
cmpl cr0,r8,r0 /* check if updated */
bne- 50b
/* Calculate and store result. Note that this mimmics the C code,
* which may cause funny results if nsec goes negative... is that
* possible at all ?
*/
add r3,r3,r6
add r4,r4,r7
lis r5,NSEC_PER_SEC@h
ori r5,r5,NSEC_PER_SEC@l
cmpli cr0,r4,r5
blt 1f
subf r4,r5,r4
addi r3,r3,1
1: stw r3,TSPC32_TV_SEC(r11)
stw r4,TSPC32_TV_NSEC(r11)
mtlr r12
li r3,0
blr
/*
* syscall fallback
*/
98:
mtlr r12
mr r3,r10
mr r4,r11
99:
li r0,__NR_clock_gettime
sc
blr
.cfi_endproc
V_FUNCTION_END(__kernel_clock_gettime)
/*
* Exact prototype of clock_getres()
*
* int __kernel_clock_getres(clockid_t clock_id, struct timespec *res);
*
*/
V_FUNCTION_BEGIN(__kernel_clock_getres)
.cfi_startproc
/* Check for supported clock IDs */
cmpwi cr0,r3,CLOCK_REALTIME
cmpwi cr1,r3,CLOCK_MONOTONIC
cror cr0,cr0,cr1
bne cr0,99f
li r3,0
cmpli cr0,r4,0
beqlr
lis r5,CLOCK_REALTIME_RES@h
ori r5,r5,CLOCK_REALTIME_RES@l
stw r3,TSPC32_TV_SEC(r4)
stw r5,TSPC32_TV_NSEC(r4)
blr
/*
* syscall fallback
*/
99:
li r0,__NR_clock_getres
sc
blr
.cfi_endproc
V_FUNCTION_END(__kernel_clock_getres)
/*
* This is the core of gettimeofday() & friends, it returns the xsec
* value in r3 & r4 and expects the datapage ptr (non clobbered)
* in r9. clobbers r0,r4,r5,r6,r7,r8.
* When returning, r8 contains the counter value that can be reused
* by the monotonic clock implementation
*/
__do_get_xsec:
.cfi_startproc
/* Check for update count & load values. We use the low
* order 32 bits of the update count
*/
#ifdef CONFIG_PPC64
1: lwz r8,(CFG_TB_UPDATE_COUNT+4)(r9)
#else
1: lwz r8,(CFG_TB_UPDATE_COUNT)(r9)
#endif
andi. r0,r8,1 /* pending update ? loop */
bne- 1b
xor r0,r8,r8 /* create dependency */
add r9,r9,r0
/* Load orig stamp (offset to TB) */
lwz r5,CFG_TB_ORIG_STAMP(r9)
lwz r6,(CFG_TB_ORIG_STAMP+4)(r9)
/* Get a stable TB value */
2: mftbu r3
mftbl r4
mftbu r0
cmpl cr0,r3,r0
bne- 2b
/* Substract tb orig stamp. If the high part is non-zero, we jump to
* the slow path which call the syscall.
* If it's ok, then we have our 32 bits tb_ticks value in r7
*/
subfc r7,r6,r4
subfe. r0,r5,r3
bne- 3f
/* Load scale factor & do multiplication */
lwz r5,CFG_TB_TO_XS(r9) /* load values */
lwz r6,(CFG_TB_TO_XS+4)(r9)
mulhwu r4,r7,r5
mulhwu r6,r7,r6
mullw r0,r7,r5
addc r6,r6,r0
/* At this point, we have the scaled xsec value in r4 + XER:CA
* we load & add the stamp since epoch
*/
lwz r5,CFG_STAMP_XSEC(r9)
lwz r6,(CFG_STAMP_XSEC+4)(r9)
adde r4,r4,r6
addze r3,r5
/* We now have our result in r3,r4. We create a fake dependency
* on that result and re-check the counter
*/
or r6,r4,r3
xor r0,r6,r6
add r9,r9,r0
#ifdef CONFIG_PPC64
lwz r0,(CFG_TB_UPDATE_COUNT+4)(r9)
#else
lwz r0,(CFG_TB_UPDATE_COUNT)(r9)
#endif
cmpl cr0,r8,r0 /* check if updated */
bne- 1b
/* Warning ! The caller expects CR:EQ to be set to indicate a
* successful calculation (so it won't fallback to the syscall
* method). We have overriden that CR bit in the counter check,
* but fortunately, the loop exit condition _is_ CR:EQ set, so
* we can exit safely here. If you change this code, be careful
* of that side effect.
*/
3: blr
.cfi_endproc

0
arch/ppc64/kernel/vdso32/note.S → arch/powerpc/kernel/vdso32/note.S
View File

0
arch/ppc64/kernel/vdso32/sigtramp.S → arch/powerpc/kernel/vdso32/sigtramp.S
View File

5
arch/ppc64/kernel/vdso32/vdso32.lds.S → arch/powerpc/kernel/vdso32/vdso32.lds.S
View File

@ -102,9 +102,12 @@ VERSION
{
VDSO_VERSION_STRING {
global:
__kernel_datapage_offset; /* Has to be there for the kernel to find it */
__kernel_datapage_offset; /* Has to be there for the kernel to find */
__kernel_get_syscall_map;
__kernel_gettimeofday;
__kernel_clock_gettime;
__kernel_clock_getres;
__kernel_get_tbfreq;
__kernel_sync_dicache;
__kernel_sync_dicache_p5;
__kernel_sigtramp32;

2
arch/ppc64/kernel/vdso32/vdso32_wrapper.S → arch/powerpc/kernel/vdso32/vdso32_wrapper.S
View File

@ -6,7 +6,7 @@
.globl vdso32_start, vdso32_end
.balign PAGE_SIZE
vdso32_start:
.incbin "arch/ppc64/kernel/vdso32/vdso32.so"
.incbin "arch/powerpc/kernel/vdso32/vdso32.so"
.balign PAGE_SIZE
vdso32_end:

0
arch/ppc64/kernel/vdso64/Makefile → arch/powerpc/kernel/vdso64/Makefile
View File

0
arch/ppc64/kernel/vdso64/cacheflush.S → arch/powerpc/kernel/vdso64/cacheflush.S
View File

16
arch/ppc64/kernel/vdso64/datapage.S → arch/powerpc/kernel/vdso64/datapage.S
View File

@ -66,3 +66,19 @@ V_FUNCTION_BEGIN(__kernel_get_syscall_map)
blr
.cfi_endproc
V_FUNCTION_END(__kernel_get_syscall_map)
/*
* void unsigned long __kernel_get_tbfreq(void);
*
* returns the timebase frequency in HZ
*/
V_FUNCTION_BEGIN(__kernel_get_tbfreq)
.cfi_startproc
mflr r12
.cfi_register lr,r12
bl V_LOCAL_FUNC(__get_datapage)
ld r3,CFG_TB_TICKS_PER_SEC(r3)
mtlr r12
.cfi_endproc
V_FUNCTION_END(__kernel_get_tbfreq)

242
arch/powerpc/kernel/vdso64/gettimeofday.S Normal file
View File

@ -0,0 +1,242 @@
/*
* Userland implementation of gettimeofday() for 64 bits processes in a
* ppc64 kernel for use in the vDSO
*
* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
* IBM Corp.
*
* 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 <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
/*
* Exact prototype of gettimeofday
*
* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz);
*
*/
V_FUNCTION_BEGIN(__kernel_gettimeofday)
.cfi_startproc
mflr r12
.cfi_register lr,r12
mr r11,r3 /* r11 holds tv */
mr r10,r4 /* r10 holds tz */
bl V_LOCAL_FUNC(__get_datapage) /* get data page */
bl V_LOCAL_FUNC(__do_get_xsec) /* get xsec from tb & kernel */
lis r7,15 /* r7 = 1000000 = USEC_PER_SEC */
ori r7,r7,16960
rldicl r5,r4,44,20 /* r5 = sec = xsec / XSEC_PER_SEC */
rldicr r6,r5,20,43 /* r6 = sec * XSEC_PER_SEC */
std r5,TVAL64_TV_SEC(r11) /* store sec in tv */
subf r0,r6,r4 /* r0 = xsec = (xsec - r6) */
mulld r0,r0,r7 /* usec = (xsec * USEC_PER_SEC) /
* XSEC_PER_SEC
*/
rldicl r0,r0,44,20
cmpldi cr0,r10,0 /* check if tz is NULL */
std r0,TVAL64_TV_USEC(r11) /* store usec in tv */
beq 1f
lwz r4,CFG_TZ_MINUTEWEST(r3)/* fill tz */
lwz r5,CFG_TZ_DSTTIME(r3)
stw r4,TZONE_TZ_MINWEST(r10)
stw r5,TZONE_TZ_DSTTIME(r10)
1: mtlr r12
li r3,0 /* always success */
blr
.cfi_endproc
V_FUNCTION_END(__kernel_gettimeofday)
/*
* Exact prototype of clock_gettime()
*
* int __kernel_clock_gettime(clockid_t clock_id, struct timespec *tp);
*
*/
V_FUNCTION_BEGIN(__kernel_clock_gettime)
.cfi_startproc
/* Check for supported clock IDs */
cmpwi cr0,r3,CLOCK_REALTIME
cmpwi cr1,r3,CLOCK_MONOTONIC
cror cr0,cr0,cr1
bne cr0,99f
mflr r12 /* r12 saves lr */
.cfi_register lr,r12
mr r10,r3 /* r10 saves id */
mr r11,r4 /* r11 saves tp */
bl V_LOCAL_FUNC(__get_datapage) /* get data page */
beq cr1,50f /* if monotonic -> jump there */
/*
* CLOCK_REALTIME
*/
bl V_LOCAL_FUNC(__do_get_xsec) /* get xsec from tb & kernel */
lis r7,0x3b9a /* r7 = 1000000000 = NSEC_PER_SEC */
ori r7,r7,0xca00
rldicl r5,r4,44,20 /* r5 = sec = xsec / XSEC_PER_SEC */
rldicr r6,r5,20,43 /* r6 = sec * XSEC_PER_SEC */
std r5,TSPC64_TV_SEC(r11) /* store sec in tv */
subf r0,r6,r4 /* r0 = xsec = (xsec - r6) */
mulld r0,r0,r7 /* nsec = (xsec * NSEC_PER_SEC) /
* XSEC_PER_SEC
*/
rldicl r0,r0,44,20
std r0,TSPC64_TV_NSEC(r11) /* store nsec in tp */
mtlr r12
li r3,0
blr
/*
* CLOCK_MONOTONIC
*/
50: bl V_LOCAL_FUNC(__do_get_xsec) /* get xsec from tb & kernel */
lis r7,0x3b9a /* r7 = 1000000000 = NSEC_PER_SEC */
ori r7,r7,0xca00
rldicl r5,r4,44,20 /* r5 = sec = xsec / XSEC_PER_SEC */
rldicr r6,r5,20,43 /* r6 = sec * XSEC_PER_SEC */
subf r0,r6,r4 /* r0 = xsec = (xsec - r6) */
mulld r0,r0,r7 /* nsec = (xsec * NSEC_PER_SEC) /
* XSEC_PER_SEC
*/
rldicl r6,r0,44,20
/* now we must fixup using wall to monotonic. We need to snapshot
* that value and do the counter trick again. Fortunately, we still
* have the counter value in r8 that was returned by __do_get_xsec.
* At this point, r5,r6 contain our sec/nsec values.
* can be used
*/
lwz r4,WTOM_CLOCK_SEC(r9)
lwz r7,WTOM_CLOCK_NSEC(r9)
/* We now have our result in r4,r7. We create a fake dependency
* on that result and re-check the counter
*/
or r9,r4,r7
xor r0,r9,r9
add r3,r3,r0
ld r0,CFG_TB_UPDATE_COUNT(r3)
cmpld cr0,r0,r8 /* check if updated */
bne- 50b
/* Calculate and store result. Note that this mimmics the C code,
* which may cause funny results if nsec goes negative... is that
* possible at all ?
*/
add r4,r4,r5
add r7,r7,r6
lis r9,NSEC_PER_SEC@h
ori r9,r9,NSEC_PER_SEC@l
cmpli cr0,r7,r9
blt 1f
subf r7,r9,r7
addi r4,r4,1
1: std r4,TSPC64_TV_SEC(r11)
std r7,TSPC64_TV_NSEC(r11)
mtlr r12
li r3,0
blr
/*
* syscall fallback
*/
98:
mtlr r12
mr r3,r10
mr r4,r11
99:
li r0,__NR_clock_gettime
sc
blr
.cfi_endproc
V_FUNCTION_END(__kernel_clock_gettime)
/*
* Exact prototype of clock_getres()
*
* int __kernel_clock_getres(clockid_t clock_id, struct timespec *res);
*
*/
V_FUNCTION_BEGIN(__kernel_clock_getres)
.cfi_startproc
/* Check for supported clock IDs */
cmpwi cr0,r3,CLOCK_REALTIME
cmpwi cr1,r3,CLOCK_MONOTONIC
cror cr0,cr0,cr1
bne cr0,99f
li r3,0
cmpli cr0,r4,0
beqlr
lis r5,CLOCK_REALTIME_RES@h
ori r5,r5,CLOCK_REALTIME_RES@l
std r3,TSPC64_TV_SEC(r4)
std r5,TSPC64_TV_NSEC(r4)
blr
/*
* syscall fallback
*/
99:
li r0,__NR_clock_getres
sc
blr
.cfi_endproc
V_FUNCTION_END(__kernel_clock_getres)
/*
* This is the core of gettimeofday(), it returns the xsec
* value in r4 and expects the datapage ptr (non clobbered)
* in r3. clobbers r0,r4,r5,r6,r7,r8
* When returning, r8 contains the counter value that can be reused
*/
V_FUNCTION_BEGIN(__do_get_xsec)
.cfi_startproc
/* check for update count & load values */
1: ld r8,CFG_TB_UPDATE_COUNT(r3)
andi. r0,r4,1 /* pending update ? loop */
bne- 1b
xor r0,r4,r4 /* create dependency */
add r3,r3,r0
/* Get TB & offset it */
mftb r7
ld r9,CFG_TB_ORIG_STAMP(r3)
subf r7,r9,r7
/* Scale result */
ld r5,CFG_TB_TO_XS(r3)
mulhdu r7,r7,r5
/* Add stamp since epoch */
ld r6,CFG_STAMP_XSEC(r3)
add r4,r6,r7
xor r0,r4,r4
add r3,r3,r0
ld r0,CFG_TB_UPDATE_COUNT(r3)
cmpld cr0,r0,r8 /* check if updated */
bne- 1b
blr
.cfi_endproc
V_FUNCTION_END(__do_get_xsec)

0
arch/ppc64/kernel/vdso64/note.S → arch/powerpc/kernel/vdso64/note.S
View File

0
arch/ppc64/kernel/vdso64/sigtramp.S → arch/powerpc/kernel/vdso64/sigtramp.S
View File

5
arch/ppc64/kernel/vdso64/vdso64.lds.S → arch/powerpc/kernel/vdso64/vdso64.lds.S
View File

@ -102,9 +102,12 @@ VERSION
{
VDSO_VERSION_STRING {
global:
__kernel_datapage_offset; /* Has to be there for the kernel to find it */
__kernel_datapage_offset; /* Has to be there for the kernel to find */
__kernel_get_syscall_map;
__kernel_gettimeofday;
__kernel_clock_gettime;
__kernel_clock_getres;
__kernel_get_tbfreq;
__kernel_sync_dicache;
__kernel_sync_dicache_p5;
__kernel_sigtramp_rt64;

2
arch/ppc64/kernel/vdso64/vdso64_wrapper.S → arch/powerpc/kernel/vdso64/vdso64_wrapper.S
View File

@ -6,7 +6,7 @@
.globl vdso64_start, vdso64_end
.balign PAGE_SIZE
vdso64_start:
.incbin "arch/ppc64/kernel/vdso64/vdso64.so"
.incbin "arch/powerpc/kernel/vdso64/vdso64.so"
.balign PAGE_SIZE
vdso64_end:

4
arch/powerpc/mm/mem.c
View File

@ -46,9 +46,7 @@
#include <asm/prom.h>
#include <asm/lmb.h>
#include <asm/sections.h>
#ifdef CONFIG_PPC64
#include <asm/vdso.h>
#endif
#include "mmu_decl.h"
@ -397,10 +395,8 @@ void __init mem_init(void)
mem_init_done = 1;
#ifdef CONFIG_PPC64
/* Initialize the vDSO */
vdso_init();
#endif
}
/*

1
arch/powerpc/oprofile/op_model_power4.c
View File

@ -14,7 +14,6 @@
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/cputable.h>
#include <asm/systemcfg.h>
#include <asm/rtas.h>
#include <asm/oprofile_impl.h>
#include <asm/reg.h>

3
arch/ppc64/kernel/Makefile
View File

@ -14,8 +14,7 @@ endif
obj-y += idle.o dma.o \
align.o \
rtc.o \
iommu.o vdso.o
obj-y += vdso32/ vdso64/
iommu.o
pci-obj-$(CONFIG_PPC_MULTIPLATFORM) += pci_dn.o pci_direct_iommu.o

140
arch/ppc64/kernel/vdso32/gettimeofday.S
View File

@ -1,140 +0,0 @@
/*
* Userland implementation of gettimeofday() for 32 bits processes in a
* ppc64 kernel for use in the vDSO
*
* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), IBM Corp.
*
* 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 <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
/*
* Exact prototype of gettimeofday
*
* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz);
*
*/
V_FUNCTION_BEGIN(__kernel_gettimeofday)
.cfi_startproc
mflr r12
.cfi_register lr,r12
mr r10,r3 /* r10 saves tv */
mr r11,r4 /* r11 saves tz */
bl __get_datapage@local /* get data page */
mr r9, r3 /* datapage ptr in r9 */
bl __do_get_xsec@local /* get xsec from tb & kernel */
bne- 2f /* out of line -> do syscall */
/* seconds are xsec >> 20 */
rlwinm r5,r4,12,20,31
rlwimi r5,r3,12,0,19
stw r5,TVAL32_TV_SEC(r10)
/* get remaining xsec and convert to usec. we scale
* up remaining xsec by 12 bits and get the top 32 bits
* of the multiplication
*/
rlwinm r5,r4,12,0,19
lis r6,1000000@h
ori r6,r6,1000000@l
mulhwu r5,r5,r6
stw r5,TVAL32_TV_USEC(r10)
cmpli cr0,r11,0 /* check if tz is NULL */
beq 1f
lwz r4,CFG_TZ_MINUTEWEST(r9)/* fill tz */
lwz r5,CFG_TZ_DSTTIME(r9)
stw r4,TZONE_TZ_MINWEST(r11)
stw r5,TZONE_TZ_DSTTIME(r11)
1: mtlr r12
li r3,0
blr
2: mr r3,r10
mr r4,r11
li r0,__NR_gettimeofday
sc
b 1b
.cfi_endproc
V_FUNCTION_END(__kernel_gettimeofday)
/*
* This is the core of gettimeofday(), it returns the xsec
* value in r3 & r4 and expects the datapage ptr (non clobbered)
* in r9. clobbers r0,r4,r5,r6,r7,r8
*/
__do_get_xsec:
.cfi_startproc
/* Check for update count & load values. We use the low
* order 32 bits of the update count
*/
1: lwz r8,(CFG_TB_UPDATE_COUNT+4)(r9)
andi. r0,r8,1 /* pending update ? loop */
bne- 1b
xor r0,r8,r8 /* create dependency */
add r9,r9,r0
/* Load orig stamp (offset to TB) */
lwz r5,CFG_TB_ORIG_STAMP(r9)
lwz r6,(CFG_TB_ORIG_STAMP+4)(r9)
/* Get a stable TB value */
2: mftbu r3
mftbl r4
mftbu r0
cmpl cr0,r3,r0
bne- 2b
/* Substract tb orig stamp. If the high part is non-zero, we jump to the
* slow path which call the syscall. If it's ok, then we have our 32 bits
* tb_ticks value in r7
*/
subfc r7,r6,r4
subfe. r0,r5,r3
bne- 3f
/* Load scale factor & do multiplication */
lwz r5,CFG_TB_TO_XS(r9) /* load values */
lwz r6,(CFG_TB_TO_XS+4)(r9)
mulhwu r4,r7,r5
mulhwu r6,r7,r6
mullw r0,r7,r5
addc r6,r6,r0
/* At this point, we have the scaled xsec value in r4 + XER:CA
* we load & add the stamp since epoch
*/
lwz r5,CFG_STAMP_XSEC(r9)
lwz r6,(CFG_STAMP_XSEC+4)(r9)
adde r4,r4,r6
addze r3,r5
/* We now have our result in r3,r4. We create a fake dependency
* on that result and re-check the counter
*/
xor r0,r4,r4
add r9,r9,r0
lwz r0,(CFG_TB_UPDATE_COUNT+4)(r9)
cmpl cr0,r8,r0 /* check if updated */
bne- 1b
/* Warning ! The caller expects CR:EQ to be set to indicate a
* successful calculation (so it won't fallback to the syscall
* method). We have overriden that CR bit in the counter check,
* but fortunately, the loop exit condition _is_ CR:EQ set, so
* we can exit safely here. If you change this code, be careful
* of that side effect.
*/
3: blr
.cfi_endproc

91
arch/ppc64/kernel/vdso64/gettimeofday.S
View File

@ -1,91 +0,0 @@
/*
* Userland implementation of gettimeofday() for 64 bits processes in a
* ppc64 kernel for use in the vDSO
*
* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
* IBM Corp.
*
* 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 <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
.text
/*
* Exact prototype of gettimeofday
*
* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz);
*
*/
V_FUNCTION_BEGIN(__kernel_gettimeofday)
.cfi_startproc
mflr r12
.cfi_register lr,r12
mr r11,r3 /* r11 holds tv */
mr r10,r4 /* r10 holds tz */
bl V_LOCAL_FUNC(__get_datapage) /* get data page */
bl V_LOCAL_FUNC(__do_get_xsec) /* get xsec from tb & kernel */
lis r7,15 /* r7 = 1000000 = USEC_PER_SEC */
ori r7,r7,16960
rldicl r5,r4,44,20 /* r5 = sec = xsec / XSEC_PER_SEC */
rldicr r6,r5,20,43 /* r6 = sec * XSEC_PER_SEC */
std r5,TVAL64_TV_SEC(r11) /* store sec in tv */
subf r0,r6,r4 /* r0 = xsec = (xsec - r6) */
mulld r0,r0,r7 /* usec = (xsec * USEC_PER_SEC) / XSEC_PER_SEC */
rldicl r0,r0,44,20
cmpldi cr0,r10,0 /* check if tz is NULL */
std r0,TVAL64_TV_USEC(r11) /* store usec in tv */
beq 1f
lwz r4,CFG_TZ_MINUTEWEST(r3)/* fill tz */
lwz r5,CFG_TZ_DSTTIME(r3)
stw r4,TZONE_TZ_MINWEST(r10)
stw r5,TZONE_TZ_DSTTIME(r10)
1: mtlr r12
li r3,0 /* always success */
blr
.cfi_endproc
V_FUNCTION_END(__kernel_gettimeofday)
/*
* This is the core of gettimeofday(), it returns the xsec
* value in r4 and expects the datapage ptr (non clobbered)
* in r3. clobbers r0,r4,r5,r6,r7,r8
*/
V_FUNCTION_BEGIN(__do_get_xsec)
.cfi_startproc
/* check for update count & load values */
1: ld r7,CFG_TB_UPDATE_COUNT(r3)
andi. r0,r4,1 /* pending update ? loop */
bne- 1b
xor r0,r4,r4 /* create dependency */
add r3,r3,r0
/* Get TB & offset it */
mftb r8
ld r9,CFG_TB_ORIG_STAMP(r3)
subf r8,r9,r8
/* Scale result */
ld r5,CFG_TB_TO_XS(r3)
mulhdu r8,r8,r5
/* Add stamp since epoch */
ld r6,CFG_STAMP_XSEC(r3)
add r4,r6,r8
xor r0,r4,r4
add r3,r3,r0
ld r0,CFG_TB_UPDATE_COUNT(r3)
cmpld cr0,r0,r7 /* check if updated */
bne- 1b
blr
.cfi_endproc
V_FUNCTION_END(__do_get_xsec)

2
include/asm-powerpc/auxvec.h
View File

@ -14,8 +14,6 @@
/* The vDSO location. We have to use the same value as x86 for glibc's
* sake :-)
*/
#ifdef __powerpc64__
#define AT_SYSINFO_EHDR 33
#endif
#endif

10
include/asm-powerpc/elf.h
View File

@ -269,14 +269,12 @@ extern int dcache_bsize;
extern int icache_bsize;
extern int ucache_bsize;
#ifdef __powerpc64__
/* vDSO has arch_setup_additional_pages */
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES /* vDSO has arch_setup_additional_pages */
extern int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack);
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack);
#define VDSO_AUX_ENT(a,b) NEW_AUX_ENT(a,b);
#else
#define VDSO_AUX_ENT(a,b)
#endif /* __powerpc64__ */
/*
* The requirements here are:

2
include/asm-powerpc/processor.h
View File

@ -177,8 +177,8 @@ struct thread_struct {
#ifdef CONFIG_PPC64
unsigned long start_tb; /* Start purr when proc switched in */
unsigned long accum_tb; /* Total accumilated purr for process */
unsigned long vdso_base; /* base of the vDSO library */
#endif
unsigned long vdso_base; /* base of the vDSO library */
unsigned long dabr; /* Data address breakpoint register */
#ifdef CONFIG_ALTIVEC
/* Complete AltiVec register set */

64
include/asm-powerpc/systemcfg.h
View File

@ -1,64 +0,0 @@
#ifndef _SYSTEMCFG_H
#define _SYSTEMCFG_H
/*
* Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
*
* 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.
*/
/* Change Activity:
* 2002/09/30 : bergner : Created
* End Change Activity
*/
/*
* If the major version changes we are incompatible.
* Minor version changes are a hint.
*/
#define SYSTEMCFG_MAJOR 1
#define SYSTEMCFG_MINOR 1
#ifndef __ASSEMBLY__
#include <linux/unistd.h>
#define SYSCALL_MAP_SIZE ((__NR_syscalls + 31) / 32)
struct systemcfg {
__u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */
struct { /* Systemcfg version numbers */
__u32 major; /* Major number 0x10 */
__u32 minor; /* Minor number 0x14 */
} version;
__u32 platform; /* Platform flags 0x18 */
__u32 processor; /* Processor type 0x1C */
__u64 processorCount; /* # of physical processors 0x20 */
__u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
__u64 tb_orig_stamp; /* Timebase at boot 0x30 */
__u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
__u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
__u64 stamp_xsec; /* 0x48 */
__u64 tb_update_count; /* Timebase atomicity ctr 0x50 */
__u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
__u32 tz_dsttime; /* Type of dst correction 0x5C */
/* next four are no longer used except to be exported to /proc */
__u32 dcache_size; /* L1 d-cache size 0x60 */
__u32 dcache_line_size; /* L1 d-cache line size 0x64 */
__u32 icache_size; /* L1 i-cache size 0x68 */
__u32 icache_line_size; /* L1 i-cache line size 0x6C */
__u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of available syscalls 0x70 */
__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of available syscalls */
};
#ifdef __KERNEL__
extern struct systemcfg *_systemcfg; /* to be renamed */
#endif
#endif /* __ASSEMBLY__ */
#endif /* _SYSTEMCFG_H */

0
include/asm-ppc64/vdso.h → include/asm-powerpc/vdso.h
View File

108
include/asm-powerpc/vdso_datapage.h Normal file
View File

@ -0,0 +1,108 @@
#ifndef _VDSO_DATAPAGE_H
#define _VDSO_DATAPAGE_H
/*
* Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
* Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>,
* IBM Corp.
*
* 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.
*/
/*
* Note about this structure:
*
* This structure was historically called systemcfg and exposed to
* userland via /proc/ppc64/systemcfg. Unfortunately, this became an
* ABI issue as some proprietary software started relying on being able
* to mmap() it, thus we have to keep the base layout at least for a
* few kernel versions.
*
* However, since ppc32 doesn't suffer from this backward handicap,
* a simpler version of the data structure is used there with only the
* fields actually used by the vDSO.
*
*/
/*
* If the major version changes we are incompatible.
* Minor version changes are a hint.
*/
#define SYSTEMCFG_MAJOR 1
#define SYSTEMCFG_MINOR 1
#ifndef __ASSEMBLY__
#include <linux/unistd.h>
#define SYSCALL_MAP_SIZE ((__NR_syscalls + 31) / 32)
/*
* So here is the ppc64 backward compatible version
*/
#ifdef CONFIG_PPC64
struct vdso_data {
__u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */
struct { /* Systemcfg version numbers */
__u32 major; /* Major number 0x10 */
__u32 minor; /* Minor number 0x14 */
} version;
__u32 platform; /* Platform flags 0x18 */
__u32 processor; /* Processor type 0x1C */
__u64 processorCount; /* # of physical processors 0x20 */
__u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
__u64 tb_orig_stamp; /* Timebase at boot 0x30 */
__u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
__u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
__u64 stamp_xsec; /* 0x48 */
__u64 tb_update_count; /* Timebase atomicity ctr 0x50 */
__u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
__u32 tz_dsttime; /* Type of dst correction 0x5C */
__u32 dcache_size; /* L1 d-cache size 0x60 */
__u32 dcache_line_size; /* L1 d-cache line size 0x64 */
__u32 icache_size; /* L1 i-cache size 0x68 */
__u32 icache_line_size; /* L1 i-cache line size 0x6C */
/* those additional ones don't have to be located anywhere
* special as they were not part of the original systemcfg
*/
__s64 wtom_clock_sec; /* Wall to monotonic clock */
__s32 wtom_clock_nsec;
__u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls */
__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
};
#else /* CONFIG_PPC64 */
/*
* And here is the simpler 32 bits version
*/
struct vdso_data {
__u64 tb_orig_stamp; /* Timebase at boot 0x30 */
__u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
__u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
__u64 stamp_xsec; /* 0x48 */
__u32 tb_update_count; /* Timebase atomicity ctr 0x50 */
__u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
__u32 tz_dsttime; /* Type of dst correction 0x5C */
__s32 wtom_clock_sec; /* Wall to monotonic clock */
__s32 wtom_clock_nsec;
__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
};
#endif /* CONFIG_PPC64 */
#ifdef __KERNEL__
extern struct vdso_data *vdso_data;
#endif
#endif /* __ASSEMBLY__ */
#endif /* _SYSTEMCFG_H */

8
include/asm-ppc/page.h
View File

@ -1,9 +1,12 @@
#ifndef _PPC_PAGE_H
#define _PPC_PAGE_H
#include <linux/config.h>
#include <asm/asm-compat.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
/*
* Subtle: this is an int (not an unsigned long) and so it
@ -169,5 +172,8 @@ extern __inline__ int get_order(unsigned long size)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
/* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */
#define __HAVE_ARCH_GATE_AREA 1
#endif /* __KERNEL__ */
#endif /* _PPC_PAGE_H */