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authorKonrad Eisele <konrad@gaisler.com>2009-08-31 22:08:13 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-02 04:19:42 -0800
commit8401707ff645521e9f21cbb8fe3b138f60e85680 (patch)
tree114287cf273b57f96d0e132cd2274c7afe60b120 /arch/sparc/kernel/entry.S
parentb6727b12dd2ffb4a890eb5b13a298230c29ba45d (diff)
sparc,leon: Sparc-Leon SMP support
Support SMP for a Sparc-Leon multiprocessor system. Add Leon specific SMP code to arch/sparc/kernel/leon_smp.c. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/entry.S')
-rw-r--r--arch/sparc/kernel/entry.S33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index f41ecc5ac0b..ec9c7bc67d2 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -400,6 +400,39 @@ linux_trap_ipi15_sun4d:
/* FIXME */
1: b,a 1b
+#ifdef CONFIG_SPARC_LEON
+
+ .globl smpleon_ticker
+ /* SMP per-cpu ticker interrupts are handled specially. */
+smpleon_ticker:
+ SAVE_ALL
+ or %l0, PSR_PIL, %g2
+ wr %g2, 0x0, %psr
+ WRITE_PAUSE
+ wr %g2, PSR_ET, %psr
+ WRITE_PAUSE
+ call leon_percpu_timer_interrupt
+ add %sp, STACKFRAME_SZ, %o0
+ wr %l0, PSR_ET, %psr
+ WRITE_PAUSE
+ RESTORE_ALL
+
+ .align 4
+ .globl linux_trap_ipi15_leon
+linux_trap_ipi15_leon:
+ SAVE_ALL
+ or %l0, PSR_PIL, %l4
+ wr %l4, 0x0, %psr
+ WRITE_PAUSE
+ wr %l4, PSR_ET, %psr
+ WRITE_PAUSE
+ call leon_cross_call_irq
+ nop
+ b ret_trap_lockless_ipi
+ clr %l6
+
+#endif /* CONFIG_SPARC_LEON */
+
#endif /* CONFIG_SMP */
/* This routine handles illegal instructions and privileged