aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/head_8xx.S12
-rw-r--r--arch/powerpc/kernel/rtas-proc.c14
-rw-r--r--arch/powerpc/kernel/smp.c12
-rw-r--r--arch/powerpc/kernel/swsusp_32.S2
-rw-r--r--arch/powerpc/kernel/time.c11
5 files changed, 36 insertions, 15 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 678f98cd5e6..3ef743fa5d7 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -542,11 +542,11 @@ DARFixed:/* Return from dcbx instruction bug workaround, r10 holds value of DAR
FixupDAR:/* Entry point for dcbx workaround. */
/* fetch instruction from memory. */
mfspr r10, SPRN_SRR0
+ andis. r11, r10, 0x8000 /* Address >= 0x80000000 */
DO_8xx_CPU6(0x3780, r3)
mtspr SPRN_MD_EPN, r10
mfspr r11, SPRN_M_TWB /* Get level 1 table entry address */
- cmplwi cr0, r11, 0x0800
- blt- 3f /* Branch if user space */
+ beq- 3f /* Branch if user space */
lis r11, (swapper_pg_dir-PAGE_OFFSET)@h
ori r11, r11, (swapper_pg_dir-PAGE_OFFSET)@l
rlwimi r11, r10, 32-20, 0xffc /* r11 = r11&~0xffc|(r10>>20)&0xffc */
@@ -768,12 +768,12 @@ start_here:
*/
initial_mmu:
tlbia /* Invalidate all TLB entries */
-#ifdef CONFIG_PIN_TLB
+/* Always pin the first 8 MB ITLB to prevent ITLB
+ misses while mucking around with SRR0/SRR1 in asm
+*/
lis r8, MI_RSV4I@h
ori r8, r8, 0x1c00
-#else
- li r8, 0
-#endif
+
mtspr SPRN_MI_CTR, r8 /* Set instruction MMU control */
#ifdef CONFIG_PIN_TLB
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index 1be9fe38bcb..8777fb02349 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -262,19 +262,19 @@ static int __init proc_rtas_init(void)
if (rtas_node == NULL)
return -ENODEV;
- proc_create("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL,
+ proc_create("powerpc/rtas/progress", S_IRUGO|S_IWUSR, NULL,
&ppc_rtas_progress_operations);
- proc_create("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL,
+ proc_create("powerpc/rtas/clock", S_IRUGO|S_IWUSR, NULL,
&ppc_rtas_clock_operations);
- proc_create("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
+ proc_create("powerpc/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
&ppc_rtas_poweron_operations);
- proc_create("ppc64/rtas/sensors", S_IRUGO, NULL,
+ proc_create("powerpc/rtas/sensors", S_IRUGO, NULL,
&ppc_rtas_sensors_operations);
- proc_create("ppc64/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
+ proc_create("powerpc/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
&ppc_rtas_tone_freq_operations);
- proc_create("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL,
+ proc_create("powerpc/rtas/volume", S_IWUSR|S_IRUGO, NULL,
&ppc_rtas_tone_volume_operations);
- proc_create("ppc64/rtas/rmo_buffer", S_IRUSR, NULL,
+ proc_create("powerpc/rtas/rmo_buffer", S_IRUSR, NULL,
&ppc_rtas_rmo_buf_ops);
return 0;
}
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a521fb8a40e..c2ee1449807 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -619,4 +619,16 @@ void __cpu_die(unsigned int cpu)
if (smp_ops->cpu_die)
smp_ops->cpu_die(cpu);
}
+
+static DEFINE_MUTEX(powerpc_cpu_hotplug_driver_mutex);
+
+void cpu_hotplug_driver_lock()
+{
+ mutex_lock(&powerpc_cpu_hotplug_driver_mutex);
+}
+
+void cpu_hotplug_driver_unlock()
+{
+ mutex_unlock(&powerpc_cpu_hotplug_driver_mutex);
+}
#endif
diff --git a/arch/powerpc/kernel/swsusp_32.S b/arch/powerpc/kernel/swsusp_32.S
index b47d8ceffb5..b0754e23743 100644
--- a/arch/powerpc/kernel/swsusp_32.S
+++ b/arch/powerpc/kernel/swsusp_32.S
@@ -303,7 +303,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
lis r4,0x1000
1: addic. r4,r4,-0x1000
tlbie r4
- blt 1b
+ bgt 1b
sync
/* restore the MSR and turn on the MMU */
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 9ba2cc88591..6c6093d67f3 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -903,12 +903,21 @@ static void decrementer_set_mode(enum clock_event_mode mode,
decrementer_set_next_event(DECREMENTER_MAX, dev);
}
+static inline uint64_t div_sc64(unsigned long ticks, unsigned long nsec,
+ int shift)
+{
+ uint64_t tmp = ((uint64_t)ticks) << shift;
+
+ do_div(tmp, nsec);
+ return tmp;
+}
+
static void __init setup_clockevent_multiplier(unsigned long hz)
{
u64 mult, shift = 32;
while (1) {
- mult = div_sc(hz, NSEC_PER_SEC, shift);
+ mult = div_sc64(hz, NSEC_PER_SEC, shift);
if (mult && (mult >> 32UL) == 0UL)
break;