MAX78000: Add ICC to SOC

This commit adds the instruction cache controller
to max78000_soc

Signed-off-by: Jackson Donaldson <jcksn@duck.com>
Reviewed-by: Peter Maydell <petermaydell@linaro.org>
Message-id: 20250704223239.248781-4-jcksn@duck.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 22 insertions, 4 deletions

diff --git a/hw/arm/max78000_soc.c b/hw/arm/max78000_soc.c
index 9676ada..0c83b08 100644
--- a/hw/arm/max78000_soc.c
+++ b/hw/arm/max78000_soc.c
@@ -17,12 +17,20 @@
 #include "hw/qdev-clock.h"
 #include "hw/misc/unimp.h"
 
+static const uint32_t max78000_icc_addr[] = {0x4002a000, 0x4002a800};
+
 static void max78000_soc_initfn(Object *obj)
 {
     MAX78000State *s = MAX78000_SOC(obj);
+    int i;
 
     object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
 
+    for (i = 0; i < MAX78000_NUM_ICC; i++) {
+        g_autofree char *name = g_strdup_printf("icc%d", i);
+        object_initialize_child(obj, name, &s->icc[i], TYPE_MAX78000_ICC);
+    }
+
     s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
 }
 
@@ -30,8 +38,9 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
 {
     MAX78000State *s = MAX78000_SOC(dev_soc);
     MemoryRegion *system_memory = get_system_memory();
-    DeviceState *armv7m;
+    DeviceState *dev, *armv7m;
     Error *err = NULL;
+    int i;
 
     if (!clock_has_source(s->sysclk)) {
         error_setg(errp, "sysclk clock must be wired up by the board code");
@@ -74,6 +83,12 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
         return;
     }
 
+    for (i = 0; i < MAX78000_NUM_ICC; i++) {
+        dev = DEVICE(&(s->icc[i]));
+        sysbus_realize(SYS_BUS_DEVICE(dev), errp);
+        sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, max78000_icc_addr[i]);
+    }
+
     create_unimplemented_device("globalControl",        0x40000000, 0x400);
     create_unimplemented_device("systemInterface",      0x40000400, 0x400);
     create_unimplemented_device("functionControl",      0x40000800, 0x400);
@@ -107,9 +122,6 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("standardDMA",          0x40028000, 0x1000);
     create_unimplemented_device("flashController0",     0x40029000, 0x400);
 
-    create_unimplemented_device("icc0",                 0x4002a000, 0x800);
-    create_unimplemented_device("icc1",                 0x4002a800, 0x800);
-
     create_unimplemented_device("adc",                  0x40034000, 0x1000);
     create_unimplemented_device("pulseTrainEngine",     0x4003c000, 0xa0);
     create_unimplemented_device("oneWireMaster",        0x4003d000, 0x1000);
diff --git a/include/hw/arm/max78000_soc.h b/include/hw/arm/max78000_soc.h
index 97bf409..27b506d 100644
--- a/include/hw/arm/max78000_soc.h
+++ b/include/hw/arm/max78000_soc.h
@@ -11,6 +11,7 @@
 
 #include "hw/or-irq.h"
 #include "hw/arm/armv7m.h"
+#include "hw/misc/max78000_icc.h"
 #include "qom/object.h"
 
 #define TYPE_MAX78000_SOC "max78000-soc"
@@ -21,6 +22,9 @@ OBJECT_DECLARE_SIMPLE_TYPE(MAX78000State, MAX78000_SOC)
 #define SRAM_BASE_ADDRESS 0x20000000
 #define SRAM_SIZE (128 * 1024)
 
+/* The MAX78k has 2 instruction caches; only icc0 matters, icc1 is for RISC */
+#define MAX78000_NUM_ICC 2
+
 struct MAX78000State {
     SysBusDevice parent_obj;
 
@@ -29,6 +33,8 @@ struct MAX78000State {
     MemoryRegion sram;
     MemoryRegion flash;
 
+    Max78000IccState icc[MAX78000_NUM_ICC];
+
     Clock *sysclk;
 };