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authorDavid Daney <david.daney@cavium.com>2012-05-15 00:04:50 -0700
committerRalf Baechle <ralf@linux-mips.org>2012-05-16 23:34:34 +0200
commit6650df3c380e0db558dbfec63ed860402c6afb2a (patch)
treee63f022dbb69c5920fd734aecb44cf8c7a225b51 /arch/mips/kernel
parent9cd9669bd60ee41d34d1b41d7a0b884806939d7b (diff)
MIPS: Move cache setup to setup_arch().
commit 97ce2c88f9ad42e3c60a9beb9fca87abf3639faa (jump-label: initialize jump-label subsystem much earlier) breaks MIPS. The jump_label_init() call was moved before trap_init() which is where we initialize flush_icache_range(). In order to be good citizens, we move cache initialization earlier so that we don't jump through a null flush_icache_range function pointer when doing the jump label initialization. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/3822/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/setup.c2
-rw-r--r--arch/mips/kernel/smp.c2
-rw-r--r--arch/mips/kernel/traps.c9
3 files changed, 8 insertions, 5 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index c504b212f8f..a53f8ec37aa 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -605,6 +605,8 @@ void __init setup_arch(char **cmdline_p)
resource_init();
plat_smp_setup();
+
+ cpu_cache_init();
}
unsigned long kernelsp[NR_CPUS];
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index ba9376bf52a..dc019a1f128 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -106,7 +106,7 @@ asmlinkage __cpuinit void start_secondary(void)
#endif /* CONFIG_MIPS_MT_SMTC */
cpu_probe();
cpu_report();
- per_cpu_trap_init();
+ per_cpu_trap_init(false);
mips_clockevent_init();
mp_ops->init_secondary();
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 24325780f83..8e3488afbcc 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1490,7 +1490,6 @@ void *set_vi_handler(int n, vi_handler_t addr)
return set_vi_srs_handler(n, addr, 0);
}
-extern void cpu_cache_init(void);
extern void tlb_init(void);
extern void flush_tlb_handlers(void);
@@ -1517,7 +1516,7 @@ static int __init ulri_disable(char *s)
}
__setup("noulri", ulri_disable);
-void __cpuinit per_cpu_trap_init(void)
+void __cpuinit per_cpu_trap_init(bool is_boot_cpu)
{
unsigned int cpu = smp_processor_id();
unsigned int status_set = ST0_CU0;
@@ -1616,7 +1615,9 @@ void __cpuinit per_cpu_trap_init(void)
#ifdef CONFIG_MIPS_MT_SMTC
if (bootTC) {
#endif /* CONFIG_MIPS_MT_SMTC */
- cpu_cache_init();
+ /* Boot CPU's cache setup in setup_arch(). */
+ if (!is_boot_cpu)
+ cpu_cache_init();
tlb_init();
#ifdef CONFIG_MIPS_MT_SMTC
} else if (!secondaryTC) {
@@ -1693,7 +1694,7 @@ void __init trap_init(void)
if (board_ebase_setup)
board_ebase_setup();
- per_cpu_trap_init();
+ per_cpu_trap_init(true);
/*
* Copy the generic exception handlers to their final destination.