add preliminary LEON support

SVN-Revision: 25139

1 files changed, 85 insertions, 0 deletions

diff --git a/target/linux/leon/patches/006-amp_support.patch b/target/linux/leon/patches/006-amp_support.patch
new file mode 100644
index 0000000000..98d1c9f30d
--- /dev/null
+++ b/target/linux/leon/patches/006-amp_support.patch
@@ -0,0 +1,85 @@
+From 25a68b8cd8ea1553f8b56278418d6c1ecc12e247 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 22 Sep 2010 10:19:34 +0200
+Subject: [PATCH] SPARC/LEON: added support for AMP systems with IRQAMP IRQ Controller.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/include/asm/leon.h      |   12 ++++++++++++
+ arch/sparc/include/asm/leon_amba.h |    6 +++---
+ arch/sparc/kernel/leon_kernel.c    |   14 ++++++++++++++
+ 3 files changed, 29 insertions(+), 3 deletions(-)
+
+--- a/arch/sparc/include/asm/leon.h
++++ b/arch/sparc/include/asm/leon.h
+@@ -224,6 +224,18 @@ static inline void sparc_leon3_disable_c
+ 			  "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
+ };
+ 
++static inline unsigned long sparc_leon3_asr17(void)
++{
++	u32 asr17;
++	__asm__ __volatile__ ("rd %%asr17, %0\n\t" : "=r"(asr17));
++	return asr17;
++};
++
++static inline int sparc_leon3_cpuid(void)
++{
++	return sparc_leon3_asr17() >> 28;
++}
++
+ #endif /*!__ASSEMBLY__*/
+ 
+ #ifdef CONFIG_SMP
+--- a/arch/sparc/include/asm/leon_amba.h
++++ b/arch/sparc/include/asm/leon_amba.h
+@@ -100,9 +100,8 @@ struct leon3_irqctrl_regs_map {
+ 	u32 mpbroadcast;
+ 	u32 notused02;
+ 	u32 notused03;
+-	u32 notused10;
+-	u32 notused11;
+-	u32 notused12;
++	u32 ampctrl;
++	u32 icsel[2];
+ 	u32 notused13;
+ 	u32 notused20;
+ 	u32 notused21;
+@@ -112,6 +111,7 @@ struct leon3_irqctrl_regs_map {
+ 	u32 force[16];
+ 	/* Extended IRQ registers */
+ 	u32 intid[16];	/* 0xc0 */
++	u32 unused[(0x1000-0x100)/4];
+ };
+ 
+ struct leon3_apbuart_regs_map {
+--- a/arch/sparc/kernel/leon_kernel.c
++++ b/arch/sparc/kernel/leon_kernel.c
+@@ -108,6 +108,7 @@ void __init leon_init_timers(irq_handler
+ 	struct device_node *rootnp, *np;
+ 	struct property *pp;
+ 	int len;
++	int cpu, icsel;
+ 
+ 	leondebug_irq_disable = 0;
+ 	leon_debug_irqout = 0;
+@@ -153,6 +154,19 @@ void __init leon_init_timers(irq_handler
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0);
+ # endif
+ 
++		/* The IRQ controller may (if implemented) consist of multiple
++		 * IRQ controllers, each mapped on a 4Kb boundary.
++		 * Each CPU may be routed to different IRQCTRLs, however
++		 * we assume that all CPUs (in SMP system) is routed to the
++		 * same IRQ Controller, and for non-SMP only one IRQCTRL is
++		 * accessed anyway.
++		 * In AMP systems, Linux may not be run on CPU0.
++		 */
++		cpu = sparc_leon3_cpuid();
++		icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
++		icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
++		leon3_irqctrl_regs += icsel;
++
+ 		LEON3_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mask[0]), 0);
+ 		eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus) >> 16) & 0xf;
+ 		if ( eirq != 0 ) {