diff options
| -rw-r--r-- | docs/system/arm/vexpress.rst | 3 | ||||
| -rw-r--r-- | hw/arm/vexpress.c | 14 |
2 files changed, 6 insertions, 11 deletions
diff --git a/docs/system/arm/vexpress.rst b/docs/system/arm/vexpress.rst index 3e3839e..38f29c7 100644 --- a/docs/system/arm/vexpress.rst +++ b/docs/system/arm/vexpress.rst @@ -58,6 +58,9 @@ Other differences between the hardware and the QEMU model: ``vexpress-a15``, and have IRQs from 40 upwards. If a dtb is provided on the command line then QEMU will edit it to include suitable entries describing these transports for the guest. +- QEMU does not currently support either dynamic or static remapping + of the area of memory at address 0: it is always mapped to alias + the first flash bank Booting a Linux kernel ---------------------- diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c index 8ff37f5..c08ea34 100644 --- a/hw/arm/vexpress.c +++ b/hw/arm/vexpress.c @@ -177,7 +177,6 @@ struct VexpressMachineState { MemoryRegion vram; MemoryRegion sram; MemoryRegion flashalias; - MemoryRegion lowram; MemoryRegion a15sram; bool secure; bool virt; @@ -276,7 +275,6 @@ static void a9_daughterboard_init(VexpressMachineState *vms, { MachineState *machine = MACHINE(vms); MemoryRegion *sysmem = get_system_memory(); - ram_addr_t low_ram_size; if (ram_size > 0x40000000) { /* 1GB is the maximum the address space permits */ @@ -284,17 +282,11 @@ static void a9_daughterboard_init(VexpressMachineState *vms, exit(1); } - low_ram_size = ram_size; - if (low_ram_size > 0x4000000) { - low_ram_size = 0x4000000; - } - /* RAM is from 0x60000000 upwards. The bottom 64MB of the + /* + * RAM is from 0x60000000 upwards. The bottom 64MB of the * address space should in theory be remappable to various - * things including ROM or RAM; we always map the RAM there. + * things including ROM or RAM; we always map the flash there. */ - memory_region_init_alias(&vms->lowram, NULL, "vexpress.lowmem", - machine->ram, 0, low_ram_size); - memory_region_add_subregion(sysmem, 0x0, &vms->lowram); memory_region_add_subregion(sysmem, 0x60000000, machine->ram); /* 0x1e000000 A9MPCore (SCU) private memory region */ |