[Xen-devel] [PATCH] xen/arm: midway: implement SMP

[Julien Grall <julien.grall@xxxxxxxxxx>]

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/platforms/midway.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/xen/arch/arm/platforms/midway.c b/xen/arch/arm/platforms/midway.c
index 399056b..3b9fcfc 100644
--- a/xen/arch/arm/platforms/midway.c
+++ b/xen/arch/arm/platforms/midway.c
@@ -47,6 +47,27 @@ static uint32_t midway_quirks(void)
     return PLATFORM_QUIRK_DOM0_MAPPING_11;
 }
 
+static int __init midway_cpu_up(int cpu)
+{
+    void __iomem *pens;
+
+    pens = ioremap_nocache(0, PAGE_SIZE);
+    if ( !pens )
+    {
+        dprintk(XENLOG_ERR, "Unable to map midway pens MMIO\n");
+        return -EFAULT;
+    }
+
+    printk("Set cpu pen %u to %"PRIpaddr" (%p)\n",
+           cpu, __pa(init_secondary), init_secondary);
+
+    writel(__pa(init_secondary), pens + 0x40 + cpu * 0x10);
+
+    iounmap(pens);
+
+    return 0;
+}
+
 static const char * const midway_dt_compat[] __initconst =
 {
     "calxeda,ecx-2000",
@@ -57,6 +78,7 @@ PLATFORM_START(midway, "CALXEDA MIDWAY")
     .compatible = midway_dt_compat,
     .reset = midway_reset,
     .quirks = midway_quirks,
+    .cpu_up = midway_cpu_up,
 PLATFORM_END
 
 /*
-- 
1.8.3.1


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