[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>

41 files changed, 1541 insertions, 430 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index c68eace12a9..9a74b7ab03a 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -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
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 8793102711a..4550eb4f4fb 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -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;
 }
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 3cf2517c5f9..a7b68f911eb 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -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 */
diff --git a/arch/powerpc/kernel/proc_ppc64.c b/arch/powerpc/kernel/proc_ppc64.c
index a1c19502fe8..7ba42a405f4 100644
--- a/arch/powerpc/kernel/proc_ppc64.c
+++ b/arch/powerpc/kernel/proc_ppc64.c
@@ -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;
 
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index ae1a36449cc..7a95b8a2835 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -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
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index a754de63450..33e7f2c7f19 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -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 */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 6791668213e..fdbd9f9122f 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -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");
@@ -568,33 +556,6 @@ static void __init emergency_stack_init(void)
 }
 
 /*
- * 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
  * mem_init is called.
@@ -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
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index a7c4515f320..8bdf95b7e42 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -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;
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index e28a139c29d..62dfc5b8d76 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -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;
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 850af198fb5..0f0c3a9ae2e 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -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>
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 260b6ecd26a..070b4b458aa 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -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;
 
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 2020bb7648f..1511454c469 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -49,7 +49,6 @@
 #ifdef CONFIG_PPC64
 #include <asm/firmware.h>
 #include <asm/processor.h>
-#include <asm/systemcfg.h>
 #endif
 
 #ifdef CONFIG_PPC64     /* XXX */
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
new file mode 100644
index 00000000000..0d4d8bec0df
--- /dev/null
+++ b/arch/powerpc/kernel/vdso.c
@@ -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;
+}
+
diff --git a/arch/ppc64/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
index 0b1b0df973e..758331d4d1a 100644
--- a/arch/ppc64/kernel/vdso32/Makefile
+++ b/arch/powerpc/kernel/vdso32/Makefile
@@ -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))
 
diff --git a/arch/ppc64/kernel/vdso32/cacheflush.S b/arch/powerpc/kernel/vdso32/cacheflush.S
index c8db993574e..c8db993574e 100644
--- a/arch/ppc64/kernel/vdso32/cacheflush.S
+++ b/arch/powerpc/kernel/vdso32/cacheflush.S
diff --git a/arch/ppc64/kernel/vdso32/datapage.S b/arch/powerpc/kernel/vdso32/datapage.S
index 4f4eb0be399..a08c26e8783 100644
--- a/arch/ppc64/kernel/vdso32/datapage.S
+++ b/arch/powerpc/kernel/vdso32/datapage.S
@@ -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)
diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S
new file mode 100644
index 00000000000..aeb5fc9b87b
--- /dev/null
+++ b/arch/powerpc/kernel/vdso32/gettimeofday.S
@@ -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
diff --git a/arch/ppc64/kernel/vdso32/note.S b/arch/powerpc/kernel/vdso32/note.S
index d4b5be4f3d5..d4b5be4f3d5 100644
--- a/arch/ppc64/kernel/vdso32/note.S
+++ b/arch/powerpc/kernel/vdso32/note.S
diff --git a/arch/ppc64/kernel/vdso32/sigtramp.S b/arch/powerpc/kernel/vdso32/sigtramp.S
index e0464278191..e0464278191 100644
--- a/arch/ppc64/kernel/vdso32/sigtramp.S
+++ b/arch/powerpc/kernel/vdso32/sigtramp.S
diff --git a/arch/ppc64/kernel/vdso32/vdso32.lds.S b/arch/powerpc/kernel/vdso32/vdso32.lds.S
index 6f87a916a39..f4bad720cb0 100644
--- a/arch/ppc64/kernel/vdso32/vdso32.lds.S
+++ b/arch/powerpc/kernel/vdso32/vdso32.lds.S
@@ -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;
diff --git a/arch/ppc64/kernel/vdso32/vdso32_wrapper.S b/arch/powerpc/kernel/vdso32/vdso32_wrapper.S
index 76ca28e09d2..556f0caa5d8 100644
--- a/arch/ppc64/kernel/vdso32/vdso32_wrapper.S
+++ b/arch/powerpc/kernel/vdso32/vdso32_wrapper.S
@@ -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:
 
diff --git a/arch/ppc64/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
index ab39988452c..ab39988452c 100644
--- a/arch/ppc64/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile
diff --git a/arch/ppc64/kernel/vdso64/cacheflush.S b/arch/powerpc/kernel/vdso64/cacheflush.S
index d4a0ad28d53..d4a0ad28d53 100644
--- a/arch/ppc64/kernel/vdso64/cacheflush.S
+++ b/arch/powerpc/kernel/vdso64/cacheflush.S
diff --git a/arch/ppc64/kernel/vdso64/datapage.S b/arch/powerpc/kernel/vdso64/datapage.S
index ed6e599ae82..e67eda0f8cd 100644
--- a/arch/ppc64/kernel/vdso64/datapage.S
+++ b/arch/powerpc/kernel/vdso64/datapage.S
@@ -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)
diff --git a/arch/powerpc/kernel/vdso64/gettimeofday.S b/arch/powerpc/kernel/vdso64/gettimeofday.S
new file mode 100644
index 00000000000..d371c02a8c0
--- /dev/null
+++ b/arch/powerpc/kernel/vdso64/gettimeofday.S
@@ -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)
diff --git a/arch/ppc64/kernel/vdso64/note.S b/arch/powerpc/kernel/vdso64/note.S
index dc2a509f7e8..dc2a509f7e8 100644
--- a/arch/ppc64/kernel/vdso64/note.S
+++ b/arch/powerpc/kernel/vdso64/note.S
diff --git a/arch/ppc64/kernel/vdso64/sigtramp.S b/arch/powerpc/kernel/vdso64/sigtramp.S
index 31b604ab56d..31b604ab56d 100644
--- a/arch/ppc64/kernel/vdso64/sigtramp.S
+++ b/arch/powerpc/kernel/vdso64/sigtramp.S
diff --git a/arch/ppc64/kernel/vdso64/vdso64.lds.S b/arch/powerpc/kernel/vdso64/vdso64.lds.S
index 9cb28181da8..4bdf224464a 100644
--- a/arch/ppc64/kernel/vdso64/vdso64.lds.S
+++ b/arch/powerpc/kernel/vdso64/vdso64.lds.S
@@ -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;
diff --git a/arch/ppc64/kernel/vdso64/vdso64_wrapper.S b/arch/powerpc/kernel/vdso64/vdso64_wrapper.S
index 771c2741c49..0529cb9e3b9 100644
--- a/arch/ppc64/kernel/vdso64/vdso64_wrapper.S
+++ b/arch/powerpc/kernel/vdso64/vdso64_wrapper.S
@@ -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:
 
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 1dd3cc69a49..e2c95fcb805 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -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
 }
 
 /*
diff --git a/arch/powerpc/oprofile/op_model_power4.c b/arch/powerpc/oprofile/op_model_power4.c
index e3a024e324b..a3401b46f3b 100644
--- a/arch/powerpc/oprofile/op_model_power4.c
+++ b/arch/powerpc/oprofile/op_model_power4.c
@@ -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>
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 7bf1a6f6f40..dac4cc20fa9 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -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
 
diff --git a/arch/ppc64/kernel/vdso32/gettimeofday.S b/arch/ppc64/kernel/vdso32/gettimeofday.S
deleted file mode 100644
index e243c1d24af..00000000000
--- a/arch/ppc64/kernel/vdso32/gettimeofday.S
+++ /dev/null
@@ -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
diff --git a/arch/ppc64/kernel/vdso64/gettimeofday.S b/arch/ppc64/kernel/vdso64/gettimeofday.S
deleted file mode 100644
index f6df8028570..00000000000
--- a/arch/ppc64/kernel/vdso64/gettimeofday.S
+++ /dev/null
@@ -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)
diff --git a/include/asm-powerpc/auxvec.h b/include/asm-powerpc/auxvec.h
index 79d8c473230..19a099b62cd 100644
--- a/include/asm-powerpc/auxvec.h
+++ b/include/asm-powerpc/auxvec.h
@@ -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
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h
index feac3458d71..3dcd65edf97 100644
--- a/include/asm-powerpc/elf.h
+++ b/include/asm-powerpc/elf.h
@@ -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:
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index f6f186b56b0..d12382d292d 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -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 */
diff --git a/include/asm-powerpc/systemcfg.h b/include/asm-powerpc/systemcfg.h
deleted file mode 100644
index 36b5cbe466f..00000000000
--- a/include/asm-powerpc/systemcfg.h
+++ /dev/null
@@ -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 */
diff --git a/include/asm-ppc64/vdso.h b/include/asm-powerpc/vdso.h
index 85d8a7be25c..85d8a7be25c 100644
--- a/include/asm-ppc64/vdso.h
+++ b/include/asm-powerpc/vdso.h
diff --git a/include/asm-powerpc/vdso_datapage.h b/include/asm-powerpc/vdso_datapage.h
new file mode 100644
index 00000000000..fc323b51366
--- /dev/null
+++ b/include/asm-powerpc/vdso_datapage.h
@@ -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 */
diff --git a/include/asm-ppc/page.h b/include/asm-ppc/page.h
index fc44f7ca62d..538e0c8ab24 100644
--- a/include/asm-ppc/page.h
+++ b/include/asm-ppc/page.h
@@ -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 */