From 446587a914cfa57c2ce529056a9ca2215bde7111 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 19 Feb 2021 14:45:43 +0000
Subject: [PATCH] hw/misc/iotkit-sysinfo.c: Implement SYS_CONFIG1 and IIDR
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For SSE-300, the SYSINFO register block has two new registers:

 * SYS_CONFIG1 indicates the config for a potential CPU2 and CPU3;
   since the SSE-300 can only be configured with a single CPU it
   is always zero

 * IIDR is the subsystem implementation identity register;
   its value is set by the SoC integrator, so we plumb this in from
   the armsse.c code as we do with SYS_VERSION and SYS_CONFIG

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: 20210219144617.4782-11-peter.maydell@linaro.org
---
 hw/arm/armsse.c                  |  5 +++++
 hw/misc/iotkit-sysinfo.c         | 22 ++++++++++++++++++++++
 include/hw/misc/iotkit-sysinfo.h |  1 +
 3 files changed, 28 insertions(+)

diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index 113a783a46..326e161c8d 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -30,6 +30,7 @@ struct ARMSSEInfo {
     int sram_banks;
     int num_cpus;
     uint32_t sys_version;
+    uint32_t iidr;
     uint32_t cpuwait_rst;
     bool has_mhus;
     bool has_ppus;
@@ -70,6 +71,7 @@ static const ARMSSEInfo armsse_variants[] = {
         .sram_banks = 1,
         .num_cpus = 1,
         .sys_version = 0x41743,
+        .iidr = 0,
         .cpuwait_rst = 0,
         .has_mhus = false,
         .has_ppus = false,
@@ -84,6 +86,7 @@ static const ARMSSEInfo armsse_variants[] = {
         .sram_banks = 4,
         .num_cpus = 2,
         .sys_version = 0x22041743,
+        .iidr = 0,
         .cpuwait_rst = 2,
         .has_mhus = true,
         .has_ppus = true,
@@ -950,6 +953,8 @@ static void armsse_realize(DeviceState *dev, Error **errp)
     }
     object_property_set_int(OBJECT(&s->sysinfo), "sse-version",
                             info->sse_version, &error_abort);
+    object_property_set_int(OBJECT(&s->sysinfo), "IIDR",
+                            info->iidr, &error_abort);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysinfo), errp)) {
         return;
     }
diff --git a/hw/misc/iotkit-sysinfo.c b/hw/misc/iotkit-sysinfo.c
index 4bd3fd4c8f..aaa9305b2e 100644
--- a/hw/misc/iotkit-sysinfo.c
+++ b/hw/misc/iotkit-sysinfo.c
@@ -30,6 +30,8 @@
 
 REG32(SYS_VERSION, 0x0)
 REG32(SYS_CONFIG, 0x4)
+REG32(SYS_CONFIG1, 0x8)
+REG32(IIDR, 0xfc8)
 REG32(PID4, 0xfd0)
 REG32(PID5, 0xfd4)
 REG32(PID6, 0xfd8)
@@ -70,6 +72,24 @@ static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
     case A_SYS_CONFIG:
         r = s->sys_config;
         break;
+    case A_SYS_CONFIG1:
+        switch (s->sse_version) {
+        case ARMSSE_SSE300:
+            return 0;
+            break;
+        default:
+            goto bad_read;
+        }
+        break;
+    case A_IIDR:
+        switch (s->sse_version) {
+        case ARMSSE_SSE300:
+            return s->iidr;
+            break;
+        default:
+            goto bad_read;
+        }
+        break;
     case A_PID4 ... A_CID3:
         switch (s->sse_version) {
         case ARMSSE_SSE300:
@@ -81,6 +101,7 @@ static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
         }
         break;
     default:
+    bad_read:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "IoTKit SysInfo read: bad offset %x\n", (int)offset);
         r = 0;
@@ -114,6 +135,7 @@ static Property iotkit_sysinfo_props[] = {
     DEFINE_PROP_UINT32("SYS_VERSION", IoTKitSysInfo, sys_version, 0),
     DEFINE_PROP_UINT32("SYS_CONFIG", IoTKitSysInfo, sys_config, 0),
     DEFINE_PROP_UINT32("sse-version", IoTKitSysInfo, sse_version, 0),
+    DEFINE_PROP_UINT32("IIDR", IoTKitSysInfo, iidr, 0),
     DEFINE_PROP_END_OF_LIST()
 };
 
diff --git a/include/hw/misc/iotkit-sysinfo.h b/include/hw/misc/iotkit-sysinfo.h
index 91bd14bdbf..91c23f90d2 100644
--- a/include/hw/misc/iotkit-sysinfo.h
+++ b/include/hw/misc/iotkit-sysinfo.h
@@ -39,6 +39,7 @@ struct IoTKitSysInfo {
     uint32_t sys_version;
     uint32_t sys_config;
     uint32_t sse_version;
+    uint32_t iidr;
 };
 
 #endif