[Qemu-devel] [patch 02/02] sparc32 use empty_slot for missing RAM

[Qemu-devel] [patch 02/02] sparc32 use empty_slot for missing RAM

[Artyom Tarasenko]

use empty_slot device for the RAM which is not installed

Models without ECC don't trap when missing ram is accessed.

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
---
 Makefile.target |    2 +-
 hw/sun4m.c      |    7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/Makefile.target b/Makefile.target
index 95c9d23..6362927 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -248,7 +248,7 @@ obj-sparc-y += cirrus_vga.o
 else
 obj-sparc-y = sun4m.o lance.o tcx.o sun4m_iommu.o slavio_intctl.o
 obj-sparc-y += slavio_timer.o slavio_misc.o sparc32_dma.o
-obj-sparc-y += cs4231.o eccmemctl.o sbi.o sun4c_intctl.o
+obj-sparc-y += cs4231.o eccmemctl.o sbi.o sun4c_intctl.o empty_slot.o
 endif
 
 obj-arm-y = integratorcp.o versatilepb.o arm_pic.o arm_timer.o
diff --git a/hw/sun4m.c b/hw/sun4m.c
index 90e661d..fb49af5 100644
--- a/hw/sun4m.c
+++ b/hw/sun4m.c
@@ -36,6 +36,7 @@
 #include "isa.h"
 #include "fw_cfg.h"
 #include "escc.h"
+#include "empty_slot.h"
 #include "qdev-addr.h"
 #include "loader.h"
 #include "elf.h"
@@ -820,7 +821,11 @@ static void sun4m_hw_init(const struct sun4m_hwdef *hwdef, ram_addr_t RAM_size,
 
     /* set up devices */
     ram_init(0, RAM_size, hwdef->max_mem);
-
+	/* models without ECC don't trap when missing ram is accessed */
+	if(!hwdef->ecc_base) {
+        empty_slot_init(RAM_size, hwdef->max_mem - RAM_size);
+    }
+	
     prom_init(hwdef->slavio_base, bios_name);
 
     slavio_intctl = slavio_intctl_init(hwdef->intctl_base,
-- 
1.6.6.1

[Qemu-devel] Re: [patch 02/02] sparc32 use empty_slot for missing RAM

[Blue Swirl]

On 4/17/10, Artyom Tarasenko <atar4qemu@googlemail.com> wrote:
> use empty_slot device for the RAM which is not installed
>
>  Models without ECC don't trap when missing ram is accessed.
>
>  Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
>  ---
>   Makefile.target |    2 +-
>   hw/sun4m.c      |    7 ++++++-
>   2 files changed, 7 insertions(+), 2 deletions(-)
>
>  diff --git a/Makefile.target b/Makefile.target
>  index 95c9d23..6362927 100644
>  --- a/Makefile.target
>  +++ b/Makefile.target
>  @@ -248,7 +248,7 @@ obj-sparc-y += cirrus_vga.o
>   else
>   obj-sparc-y = sun4m.o lance.o tcx.o sun4m_iommu.o slavio_intctl.o
>   obj-sparc-y += slavio_timer.o slavio_misc.o sparc32_dma.o
>  -obj-sparc-y += cs4231.o eccmemctl.o sbi.o sun4c_intctl.o
>  +obj-sparc-y += cs4231.o eccmemctl.o sbi.o sun4c_intctl.o empty_slot.o
>   endif

The device could be compiled once, so please use instead
Makefile.objs, conditional to CONFIG_EMPTY_SLOT which gets defined in
default-configs/sparc-softmmu.mak.

On the other hand, the device is not used by other boards yet, so
there is no benefit at this point.

>   obj-arm-y = integratorcp.o versatilepb.o arm_pic.o arm_timer.o
>  diff --git a/hw/sun4m.c b/hw/sun4m.c
>  index 90e661d..fb49af5 100644
>  --- a/hw/sun4m.c
>  +++ b/hw/sun4m.c
>  @@ -36,6 +36,7 @@
>   #include "isa.h"
>   #include "fw_cfg.h"
>   #include "escc.h"
>  +#include "empty_slot.h"
>   #include "qdev-addr.h"
>   #include "loader.h"
>   #include "elf.h"
>  @@ -820,7 +821,11 @@ static void sun4m_hw_init(const struct sun4m_hwdef *hwdef, ram_addr_t RAM_size,
>
>      /* set up devices */
>      ram_init(0, RAM_size, hwdef->max_mem);
>  -
>  +       /* models without ECC don't trap when missing ram is accessed */
>  +       if(!hwdef->ecc_base) {

The indentation seems to be off and there should be a space between
'if' and '('.

>  +        empty_slot_init(RAM_size, hwdef->max_mem - RAM_size);
>  +    }
>  +
>      prom_init(hwdef->slavio_base, bios_name);
>
>      slavio_intctl = slavio_intctl_init(hwdef->intctl_base,
>
> --
>  1.6.6.1
>
>