hw/arm/armsse: Support variants with ARMSSE_CPU_PWRCTRL block

Support SSE variants like the SSE-300 with an ARMSSE_CPU_PWRCTRL register
block. Because this block is per-CPU and does not clash with any of the
SSE-200 devices, we handle it with a has_cpu_pwrctrl flag like the
existing has_cachectrl, has_cpusectrl and has_cpuid, rather than
trying to add per-CPU-device support to the devinfo array handling code.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210219144617.4782-35-peter.maydell@linaro.org

2 files changed, 29 insertions, 0 deletions

diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index ec9c30e099..2366c49376 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -66,6 +66,7 @@ struct ARMSSEInfo {
     bool has_cachectrl;
     bool has_cpusecctrl;
     bool has_cpuid;
+    bool has_cpu_pwrctrl;
     bool has_sse_counter;
     Property *props;
     const ARMSSEDeviceInfo *devinfo;
@@ -364,6 +365,7 @@ static const ARMSSEInfo armsse_variants[] = {
         .has_cachectrl = false,
         .has_cpusecctrl = false,
         .has_cpuid = false,
+        .has_cpu_pwrctrl = false,
         .has_sse_counter = false,
         .props = iotkit_properties,
         .devinfo = iotkit_devices,
@@ -381,6 +383,7 @@ static const ARMSSEInfo armsse_variants[] = {
         .has_cachectrl = true,
         .has_cpusecctrl = true,
         .has_cpuid = true,
+        .has_cpu_pwrctrl = false,
         .has_sse_counter = false,
         .props = armsse_properties,
         .devinfo = sse200_devices,
@@ -660,6 +663,15 @@ static void armsse_init(Object *obj)
             g_free(name);
         }
     }
+    if (info->has_cpu_pwrctrl) {
+        for (i = 0; i < info->num_cpus; i++) {
+            char *name = g_strdup_printf("cpu_pwrctrl%d", i);
+
+            object_initialize_child(obj, name, &s->cpu_pwrctrl[i],
+                                    TYPE_ARMSSE_CPU_PWRCTRL);
+            g_free(name);
+        }
+    }
     if (info->has_sse_counter) {
         object_initialize_child(obj, "sse-counter", &s->sse_counter,
                                 TYPE_SSE_COUNTER);
@@ -1255,6 +1267,8 @@ static void armsse_realize(DeviceState *dev, Error **errp)
      *  0x50010000: L1 icache control registers
      *  0x50011000: CPUSECCTRL (CPU local security control registers)
      *  0x4001f000 and 0x5001f000: CPU_IDENTITY register block
+     * The SSE-300 has an extra:
+     *  0x40012000 and 0x50012000: CPU_PWRCTRL register block
      */
     if (info->has_cachectrl) {
         for (i = 0; i < info->num_cpus; i++) {
@@ -1301,6 +1315,18 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             memory_region_add_subregion(&s->cpu_container[i], 0x4001F000, mr);
         }
     }
+    if (info->has_cpu_pwrctrl) {
+        for (i = 0; i < info->num_cpus; i++) {
+            MemoryRegion *mr;
+
+            if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpu_pwrctrl[i]), errp)) {
+                return;
+            }
+
+            mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpu_pwrctrl[i]), 0);
+            memory_region_add_subregion(&s->cpu_container[i], 0x40012000, mr);
+        }
+    }
 
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc[1]), errp)) {
         return;
diff --git a/include/hw/arm/armsse.h b/include/hw/arm/armsse.h
index f4e2b68047..21d239c381 100644
--- a/include/hw/arm/armsse.h
+++ b/include/hw/arm/armsse.h
@@ -104,6 +104,7 @@
 #include "hw/misc/iotkit-sysinfo.h"
 #include "hw/misc/armsse-cpuid.h"
 #include "hw/misc/armsse-mhu.h"
+#include "hw/misc/armsse-cpu-pwrctrl.h"
 #include "hw/misc/unimp.h"
 #include "hw/or-irq.h"
 #include "hw/clock.h"
@@ -179,6 +180,8 @@ struct ARMSSE {
 
     ARMSSECPUID cpuid[SSE_MAX_CPUS];
 
+    ARMSSECPUPwrCtrl cpu_pwrctrl[SSE_MAX_CPUS];
+
     /*
      * 'container' holds all devices seen by all CPUs.
      * 'cpu_container[i]' is the view that CPU i has: this has the