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| author | Tiejun Chen <tiejun.chen@windriver.com> | 2013-10-23 17:31:21 +0800 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-03-19 19:57:09 -0500 |
| commit | 160c73243350304c09e69cbcc4fa34ff89868b68 (patch) | |
| tree | 0e4bb349289df87f64ccae7a9184088b3532ffc1 | |
| parent | b0b7dcbdf327bc57018d498e07331b2c96916dc7 (diff) | |
| download | linux-160c73243350304c09e69cbcc4fa34ff89868b68.tar.bz2 | |
powerpc/book3e: initialize crit/mc/dbg kernel stack pointers
We already allocated critical/machine/debug check exceptions, but
we also should initialize those associated kernel stack pointers
for use by special exceptions in the PACA.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index f5f11a7d30e5..da9c42f53bb1 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -552,14 +552,20 @@ static void __init irqstack_early_init(void) static void __init exc_lvl_early_init(void) { unsigned int i; + unsigned long sp; for_each_possible_cpu(i) { - critirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - dbgirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - mcheckirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); + sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); + critirq_ctx[i] = (struct thread_info *)__va(sp); + paca[i].crit_kstack = __va(sp + THREAD_SIZE); + + sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); + dbgirq_ctx[i] = (struct thread_info *)__va(sp); + paca[i].dbg_kstack = __va(sp + THREAD_SIZE); + + sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); + mcheckirq_ctx[i] = (struct thread_info *)__va(sp); + paca[i].mc_kstack = __va(sp + THREAD_SIZE); } if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) |