From: Philippe Mathieu-Daudé <f4...@amsat.org>
>From the "A10 User Manual V1.20" p.29: "3.2. Memory Mapping" and:
7. System Control
7.1. Overview
A10 embeds a high-speed SRAM which has been split into five segments.
See detailed memory mapping in following table:
Area Address Size (Bytes)
A1 0x00000000-0x00003FFF 16K
A2 0x00004000-0x00007FFF 16K
A3 0x00008000-0x0000B3FF 13K
A4 0x0000B400-0x0000BFFF 3K
Since for emulation purpose we don't need the segmentations, we simply define
the 'A' area as a single 48KB SRAM.
We don't implement the following others areas:
- 'B': 'Secure RAM' (64K),
- 'C': Debug/ISP SRAM
- 'D': USB SRAM
(qemu) info mtree
address-space: memory
0000000000000000-ffffffffffffffff (prio 0, i/o): system
0000000000000000-000000000000bfff (prio 0, ram): sram A
0000000001c00000-0000000001c00fff (prio -1000, i/o): a10-sram-ctrl
0000000001c0b000-0000000001c0bfff (prio 0, i/o): aw_emac
0000000001c18000-0000000001c18fff (prio 0, i/o): ahci
0000000001c18080-0000000001c180ff (prio 0, i/o): allwinner-ahci
0000000001c20400-0000000001c207ff (prio 0, i/o): allwinner-a10-pic
0000000001c20c00-0000000001c20fff (prio 0, i/o): allwinner-A10-timer
0000000001c28000-0000000001c2801f (prio 0, i/o): serial
0000000040000000-0000000047ffffff (prio 0, ram): cubieboard.ram
Reported-by: Charlie Smurthwaite <charlie@atech.media>
Tested-by: Charlie Smurthwaite <charlie@atech.media>
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Message-id: 20190104142921.878-1-f4...@amsat.org
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
include/hw/arm/allwinner-a10.h | 1 +
hw/arm/allwinner-a10.c | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/include/hw/arm/allwinner-a10.h b/include/hw/arm/allwinner-a10.h
index efb8fc81236..389e128d0fc 100644
--- a/include/hw/arm/allwinner-a10.h
+++ b/include/hw/arm/allwinner-a10.h
@@ -35,6 +35,7 @@ typedef struct AwA10State {
AwA10PICState intc;
AwEmacState emac;
AllwinnerAHCIState sata;
+ MemoryRegion sram_a;
} AwA10State;
#define ALLWINNER_H_
diff --git a/hw/arm/allwinner-a10.c b/hw/arm/allwinner-a10.c
index 9fe875cdb5e..df0d079ad0a 100644
--- a/hw/arm/allwinner-a10.c
+++ b/hw/arm/allwinner-a10.c
@@ -22,6 +22,7 @@
#include "hw/sysbus.h"
#include "hw/devices.h"
#include "hw/arm/allwinner-a10.h"
+#include "hw/misc/unimp.h"
static void aw_a10_init(Object *obj)
{
@@ -85,6 +86,11 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
sysbus_connect_irq(sysbusdev, 4, s->irq[67]);
sysbus_connect_irq(sysbusdev, 5, s->irq[68]);
+ memory_region_init_ram(&s->sram_a, OBJECT(dev), "sram A", 48 * KiB,
+ &error_fatal);
+ memory_region_add_subregion(get_system_memory(), 0x00000000, &s->sram_a);
+ create_unimplemented_device("a10-sram-ctrl", 0x01c00000, 4 * KiB);
+
/* FIXME use qdev NIC properties instead of nd_table[] */
if (nd_table[0].used) {
qemu_check_nic_model(&nd_table[0], TYPE_AW_EMAC);
--
2.19.2
