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-rw-r--r--arch/sparc64/kernel/irq.c30
-rw-r--r--arch/sparc64/kernel/setup.c2
-rw-r--r--arch/sparc64/kernel/smp.c6
-rw-r--r--arch/sparc64/kernel/trampoline.S92
-rw-r--r--arch/sparc64/kernel/traps.c4
-rw-r--r--include/asm-sparc64/cpudata.h2
6 files changed, 85 insertions, 51 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 6eb44ca5dba..bb0bb34555d 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -1018,21 +1018,29 @@ static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb, int use_
}
/* Allocate and register the mondo and error queues for this cpu. */
-void __cpuinit sun4v_init_mondo_queues(int use_bootmem)
+void __cpuinit sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load)
{
- int cpu = hard_smp_processor_id();
struct trap_per_cpu *tb = &trap_block[cpu];
- alloc_one_mondo(&tb->cpu_mondo_pa, use_bootmem);
- alloc_one_mondo(&tb->dev_mondo_pa, use_bootmem);
- alloc_one_mondo(&tb->resum_mondo_pa, use_bootmem);
- alloc_one_kbuf(&tb->resum_kernel_buf_pa, use_bootmem);
- alloc_one_mondo(&tb->nonresum_mondo_pa, use_bootmem);
- alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, use_bootmem);
+ if (alloc) {
+ alloc_one_mondo(&tb->cpu_mondo_pa, use_bootmem);
+ alloc_one_mondo(&tb->dev_mondo_pa, use_bootmem);
+ alloc_one_mondo(&tb->resum_mondo_pa, use_bootmem);
+ alloc_one_kbuf(&tb->resum_kernel_buf_pa, use_bootmem);
+ alloc_one_mondo(&tb->nonresum_mondo_pa, use_bootmem);
+ alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, use_bootmem);
- init_cpu_send_mondo_info(tb, use_bootmem);
+ init_cpu_send_mondo_info(tb, use_bootmem);
+ }
- sun4v_register_mondo_queues(cpu);
+ if (load) {
+ if (cpu != hard_smp_processor_id()) {
+ prom_printf("SUN4V: init mondo on cpu %d not %d\n",
+ cpu, hard_smp_processor_id());
+ prom_halt();
+ }
+ sun4v_register_mondo_queues(cpu);
+ }
}
/* Only invoked on boot processor. */
@@ -1043,7 +1051,7 @@ void __init init_IRQ(void)
memset(&ivector_table[0], 0, sizeof(ivector_table));
if (tlb_type == hypervisor)
- sun4v_init_mondo_queues(1);
+ sun4v_init_mondo_queues(1, hard_smp_processor_id(), 1, 1);
/* We need to clear any IRQ's pending in the soft interrupt
* registers, a spurious one could be left around from the
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
index 06807cf95ee..9b0c409d5b6 100644
--- a/arch/sparc64/kernel/setup.c
+++ b/arch/sparc64/kernel/setup.c
@@ -384,7 +384,7 @@ void __init setup_arch(char **cmdline_p)
paging_init();
/* Get boot processor trap_block[] setup. */
- init_cur_cpu_trap();
+ init_cur_cpu_trap(current_thread_info());
}
static int __init set_preferred_console(void)
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 527dfd7ae21..b586345fe3b 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -316,6 +316,8 @@ static void smp_synchronize_one_tick(int cpu)
spin_unlock_irqrestore(&itc_sync_lock, flags);
}
+extern void sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load);
+
extern unsigned long sparc64_cpu_startup;
/* The OBP cpu startup callback truncates the 3rd arg cookie to
@@ -339,6 +341,9 @@ static int __devinit smp_boot_one_cpu(unsigned int cpu)
cpu_set(cpu, cpu_callout_map);
if (tlb_type == hypervisor) {
+ /* Alloc the mondo queues, cpu will load them. */
+ sun4v_init_mondo_queues(0, cpu, 1, 0);
+
prom_startcpu_cpuid(cpu, entry, cookie);
} else {
int cpu_node;
@@ -352,6 +357,7 @@ static int __devinit smp_boot_one_cpu(unsigned int cpu)
break;
udelay(100);
}
+
if (callin_flag) {
ret = 0;
} else {
diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S
index b9c9f54b0a0..a4dc01a3d23 100644
--- a/arch/sparc64/kernel/trampoline.S
+++ b/arch/sparc64/kernel/trampoline.S
@@ -30,12 +30,16 @@ itlb_load:
dtlb_load:
.asciz "SUNW,dtlb-load"
+ /* XXX __cpuinit this thing XXX */
+#define TRAMP_STACK_SIZE 1024
+ .align 16
+tramp_stack:
+ .skip TRAMP_STACK_SIZE
+
.text
.align 8
.globl sparc64_cpu_startup, sparc64_cpu_startup_end
sparc64_cpu_startup:
- flushw
-
BRANCH_IF_SUN4V(g1, niagara_startup)
BRANCH_IF_CHEETAH_BASE(g1, g5, cheetah_startup)
BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1, g5, cheetah_plus_startup)
@@ -58,6 +62,7 @@ cheetah_startup:
or %g5, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g5
stxa %g5, [%g0] ASI_DCU_CONTROL_REG
membar #Sync
+ /* fallthru */
cheetah_generic_startup:
mov TSB_EXTENSION_P, %g3
@@ -90,19 +95,17 @@ spitfire_startup:
membar #Sync
startup_continue:
- wrpr %g0, 15, %pil
-
sethi %hi(0x80000000), %g2
sllx %g2, 32, %g2
wr %g2, 0, %tick_cmpr
+ mov %o0, %l0
+
BRANCH_IF_SUN4V(g1, niagara_lock_tlb)
/* Call OBP by hand to lock KERNBASE into i/d tlbs.
* We lock 2 consequetive entries if we are 'bigkernel'.
*/
- mov %o0, %l0
-
sethi %hi(prom_entry_lock), %g2
1: ldstub [%g2 + %lo(prom_entry_lock)], %g1
membar #StoreLoad | #StoreStore
@@ -112,7 +115,6 @@ startup_continue:
sethi %hi(p1275buf), %g2
or %g2, %lo(p1275buf), %g2
ldx [%g2 + 0x10], %l2
- mov %sp, %l1
add %l2, -(192 + 128), %sp
flushw
@@ -308,18 +310,9 @@ niagara_lock_tlb:
ta HV_FAST_TRAP
after_lock_tlb:
- mov %l1, %sp
- flushw
-
- mov %l0, %o0
-
wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
wr %g0, 0, %fprs
- /* XXX Buggy PROM... */
- srl %o0, 0, %o0
- ldx [%o0], %g6
-
wr %g0, ASI_P, %asi
mov PRIMARY_CONTEXT, %g7
@@ -341,22 +334,25 @@ after_lock_tlb:
membar #Sync
- mov 1, %g5
- sllx %g5, THREAD_SHIFT, %g5
- sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
- add %g6, %g5, %sp
+ /* Everything we do here, until we properly take over the
+ * trap table, must be done with extreme care. We cannot
+ * make any references to %g6 (current thread pointer),
+ * %g4 (current task pointer), or %g5 (base of current cpu's
+ * per-cpu area) until we properly take over the trap table
+ * from the firmware and hypervisor.
+ *
+ * Get onto temporary stack which is in the locked kernel image.
+ */
+ sethi %hi(tramp_stack), %g1
+ or %g1, %lo(tramp_stack), %g1
+ add %g1, TRAMP_STACK_SIZE, %g1
+ sub %g1, STACKFRAME_SZ + STACK_BIAS, %sp
mov 0, %fp
- wrpr %g0, 0, %wstate
- wrpr %g0, 0, %tl
-
- /* Load TBA, then we can resurface. */
- sethi %hi(sparc64_ttable_tl0), %g5
- wrpr %g5, %tba
-
- ldx [%g6 + TI_TASK], %g4
-
- wrpr %g0, 0, %wstate
+ /* Put garbage in these registers to trap any access to them. */
+ set 0xdeadbeef, %g4
+ set 0xdeadbeef, %g5
+ set 0xdeadbeef, %g6
call init_irqwork_curcpu
nop
@@ -367,11 +363,17 @@ after_lock_tlb:
bne,pt %icc, 1f
nop
+ call hard_smp_processor_id
+ nop
+
+ mov %o0, %o1
+ mov 0, %o0
+ mov 0, %o2
call sun4v_init_mondo_queues
- mov 0, %o0
+ mov 1, %o3
1: call init_cur_cpu_trap
- nop
+ ldx [%l0], %o0
/* Start using proper page size encodings in ctx register. */
sethi %hi(sparc64_kern_pri_context), %g3
@@ -386,9 +388,14 @@ after_lock_tlb:
membar #Sync
- rdpr %pstate, %o1
- or %o1, PSTATE_IE, %o1
- wrpr %o1, 0, %pstate
+ wrpr %g0, 0, %wstate
+
+ /* As a hack, put &init_thread_union into %g6.
+ * prom_world() loads from here to restore the %asi
+ * register.
+ */
+ sethi %hi(init_thread_union), %g6
+ or %g6, %lo(init_thread_union), %g6
sethi %hi(is_sun4v), %o0
lduw [%o0 + %lo(is_sun4v)], %o0
@@ -418,7 +425,20 @@ after_lock_tlb:
1: call prom_set_trap_table
sethi %hi(sparc64_ttable_tl0), %o0
-2: call smp_callin
+2: ldx [%l0], %g6
+ ldx [%g6 + TI_TASK], %g4
+
+ mov 1, %g5
+ sllx %g5, THREAD_SHIFT, %g5
+ sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
+ add %g6, %g5, %sp
+ mov 0, %fp
+
+ rdpr %pstate, %o1
+ or %o1, PSTATE_IE, %o1
+ wrpr %o1, 0, %pstate
+
+ call smp_callin
nop
call cpu_idle
mov 0, %o0
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index 5956d0a9400..c9484ae5bb8 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -2413,12 +2413,12 @@ struct trap_per_cpu trap_block[NR_CPUS];
/* This can get invoked before sched_init() so play it super safe
* and use hard_smp_processor_id().
*/
-void init_cur_cpu_trap(void)
+void init_cur_cpu_trap(struct thread_info *t)
{
int cpu = hard_smp_processor_id();
struct trap_per_cpu *p = &trap_block[cpu];
- p->thread = current_thread_info();
+ p->thread = t;
p->pgd_paddr = 0;
}
diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index 5a970f5ed9b..771aa94dfd9 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -77,7 +77,7 @@ struct trap_per_cpu {
unsigned long __pad2[4];
} __attribute__((aligned(64)));
extern struct trap_per_cpu trap_block[NR_CPUS];
-extern void init_cur_cpu_trap(void);
+extern void init_cur_cpu_trap(struct thread_info *);
extern void setup_tba(void);
#ifdef CONFIG_SMP
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 07:18:33 +0000