hw/arm/sbsa-ref : Add embedded controller in secure memory

Add the previously created sbsa-ec device to the sbsa-ref machine in
secure memory so the PSCI implementation in ARM-TF can access it, but
not expose it to non secure firmware or OS except by via ARM-TF.

Signed-off-by: Graeme Gregory <graeme@nuviainc.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
Tested-by: Leif Lindholm <leif@nuviainc.com>
Message-id: 20200826141952.136164-3-graeme@nuviainc.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/sbsa-ref.c

@@ -62,6 +62,7 @@ enum {
     SBSA_CPUPERIPHS,
     SBSA_GIC_DIST,
     SBSA_GIC_REDIST,
+    SBSA_SECURE_EC,
     SBSA_SMMU,
     SBSA_UART,
     SBSA_RTC,
@@ -107,6 +108,7 @@ static const MemMapEntry sbsa_ref_memmap[] = {
     [SBSA_CPUPERIPHS] =         { 0x40000000, 0x00040000 },
     [SBSA_GIC_DIST] =           { 0x40060000, 0x00010000 },
     [SBSA_GIC_REDIST] =         { 0x40080000, 0x04000000 },
+    [SBSA_SECURE_EC] =          { 0x50000000, 0x00001000 },
     [SBSA_UART] =               { 0x60000000, 0x00001000 },
     [SBSA_RTC] =                { 0x60010000, 0x00001000 },
     [SBSA_GPIO] =               { 0x60020000, 0x00001000 },
@@ -608,6 +610,16 @@ static void *sbsa_ref_dtb(const struct arm_boot_info *binfo, int *fdt_size)
     return board->fdt;
 }
 
+static void create_secure_ec(MemoryRegion *mem)
+{
+    hwaddr base = sbsa_ref_memmap[SBSA_SECURE_EC].base;
+    DeviceState *dev = qdev_new("sbsa-ec");
+    SysBusDevice *s = SYS_BUS_DEVICE(dev);
+
+    memory_region_add_subregion(mem, base,
+                                sysbus_mmio_get_region(s, 0));
+}
+
 static void sbsa_ref_init(MachineState *machine)
 {
     unsigned int smp_cpus = machine->smp.cpus;
@@ -731,6 +743,8 @@ static void sbsa_ref_init(MachineState *machine)
 
     create_pcie(sms);
 
+    create_secure_ec(secure_sysmem);
+
     sms->bootinfo.ram_size = machine->ram_size;
     sms->bootinfo.nb_cpus = smp_cpus;
     sms->bootinfo.board_id = -1;