[Qemu-devel] [PULL 13/62] arm/highbank: Fix CBAR initialisation

[Peter Maydell <peter.maydell@linaro.org>]

From: Peter Crosthwaite <peter.crosthwaite@xilinx.com>

Fix the CBAR initialisation by using the newly defined static property.
CBAR is now set before realization, so the intended value is now
actually used.

So I have kind of tested this. I booted an ARM kernel on Highbank with
the stock Highbank DTB. It doesn't boot (and I will be doing something
wrong), but before this patch I got this:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at /workspaces/pcrost/public/linux2.git/arch/arm/mm/ioremap.c:301 __arm_ioremap_pfn_caller+0x180/0x198()
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W 3.13.0-rc1-next-20131126-dirty #2
[<c0015164>] (unwind_backtrace) from [<c00118c0>] (show_stack+0x10/0x14)
[<c00118c0>] (show_stack) from [<c02bd5fc>] (dump_stack+0x78/0x90)
[<c02bd5fc>] (dump_stack) from [<c001f110>] (warn_slowpath_common+0x68/0x84)
[<c001f110>] (warn_slowpath_common) from [<c001f1f4>] (warn_slowpath_null+0x1c/0x24)
[<c001f1f4>] (warn_slowpath_null) from [<c0017c6c>] (__arm_ioremap_pfn_caller+0x180/0x198)
[<c0017c6c>] (__arm_ioremap_pfn_caller) from [<c0017cd8>] (__arm_ioremap_caller+0x54/0x5c)
[<c0017cd8>] (__arm_ioremap_caller) from [<c0017d10>] (__arm_ioremap+0x18/0x1c)
[<c0017d10>] (__arm_ioremap) from [<c03913c0>] (highbank_init_irq+0x34/0x8c)
[<c03913c0>] (highbank_init_irq) from [<c038c228>] (init_IRQ+0x28/0x2c)
[<c038c228>] (init_IRQ) from [<c03899ec>] (start_kernel+0x234/0x398)
[<c03899ec>] (start_kernel) from [<00008074>] (0x8074)
---[ end trace 3406ff24bd97382f ]---

Which disappears with this patch.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: fedec366aaa512d75093635f523d1dbcb3358361.1387160489.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/highbank.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index 1d19d8f..cb32325 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -236,14 +236,16 @@ static void calxeda_init(QEMUMachineInitArgs *args, enum cxmachines machine)
 
         cpu = ARM_CPU(object_new(object_class_get_name(oc)));
 
+        object_property_set_int(OBJECT(cpu), GIC_BASE_ADDR, "reset-cbar", &err);
+        if (err) {
+            error_report("%s", error_get_pretty(err));
+            exit(1);
+        }
         object_property_set_bool(OBJECT(cpu), true, "realized", &err);
         if (err) {
             error_report("%s", error_get_pretty(err));
             exit(1);
         }
-
-        /* This will become a QOM property eventually */
-        cpu->reset_cbar = GIC_BASE_ADDR;
         cpu_irq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ);
     }
 
-- 
1.8.5