hw/riscv/atlantis: Decouple RAM size from MachineState

Keep a reference to the machine's RAM MemoryRegion in TTAtlantisState,
and get the MemoryRegion's size where the configured RAM size is
required.

This allows reading the RAM size without needing a pointer to
MachineState, decoupling the memory layout setup from the machine.

Reviewed-by: Daniel Henrique Barboza <daniel.barboza@oss.qualcomm.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Message-ID: <20260903055131.257903-13-joel@jms.id.au>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/hw/riscv/tt_atlantis.h b/include/hw/riscv/tt_atlantis.h
index a29c67c1cf..2ec283d0fd 100644
--- a/include/hw/riscv/tt_atlantis.h
+++ b/include/hw/riscv/tt_atlantis.h
@@ -30,6 +30,7 @@ struct TTAtlantisState {
     const MemMapEntry *memmap;
 
     MemoryRegion *memory;
+    MemoryRegion *dram;
     RISCVHartArrayState cpus;
     DeviceState *irqchip;
     DesignWareI2CState i2c[TT_ATL_NUM_I2C];