hw/arm/mps2: New board model mps2-an500

Implement a model of the MPS2 with the AN500 firmware. This is
similar to the AN385, with the following differences:
 * Cortex-M7 CPU
 * PSRAM is at 0x6000_0000
 * Ethernet is at 0xa000_0000
 * No zbt_boot_ctrl remapping of the low 16K
   (but QEMU doesn't implement this anyway)
 * no "block RAM" at 0x01000000

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200903202048.15370-3-peter.maydell@linaro.org

2 files changed, 59 insertions, 12 deletions

diff --git a/docs/system/arm/mps2.rst b/docs/system/arm/mps2.rst
index e680a4c..7f2e9c8 100644
--- a/docs/system/arm/mps2.rst
+++ b/docs/system/arm/mps2.rst
@@ -1,5 +1,5 @@
-Arm MPS2 boards (``mps2-an385``, ``mps2-an386``, ``mps2-an505``, ``mps2-an511``, ``mps2-an521``)
-================================================================================================
+Arm MPS2 boards (``mps2-an385``, ``mps2-an386``, ``mps2-an500``, ``mps2-an505``, ``mps2-an511``, ``mps2-an521``)
+================================================================================================================
 
 These board models all use Arm M-profile CPUs.
 
@@ -14,6 +14,8 @@ QEMU models the following FPGA images:
   Cortex-M3 as documented in ARM Application Note AN385
 ``mps2-an386``
   Cortex-M4 as documented in ARM Application Note AN386
+``mps2-an500``
+  Cortex-M7 as documented in ARM Application Note AN500
 ``mps2-an511``
   Cortex-M3 'DesignStart' as documented in AN511
 ``mps2-an505``
diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index d3ec73f..5d47160 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -16,6 +16,7 @@
  * We model the following FPGA images:
  *  "mps2-an385" -- Cortex-M3 as documented in ARM Application Note AN385
  *  "mps2-an386" -- Cortex-M4 as documented in ARM Application Note AN386
+ *  "mps2-an500" -- Cortex-M7 as documented in ARM Application Note AN500
  *  "mps2-an511" -- Cortex-M3 'DesignStart' as documented in AN511
  *
  * Links to the TRM for the board itself and to the various Application
@@ -50,6 +51,7 @@
 typedef enum MPS2FPGAType {
     FPGA_AN385,
     FPGA_AN386,
+    FPGA_AN500,
     FPGA_AN511,
 } MPS2FPGAType;
 
@@ -57,6 +59,9 @@ struct MPS2MachineClass {
     MachineClass parent;
     MPS2FPGAType fpga_type;
     uint32_t scc_id;
+    bool has_block_ram;
+    hwaddr ethernet_base;
+    hwaddr psram_base;
 };
 typedef struct MPS2MachineClass MPS2MachineClass;
 
@@ -85,6 +90,7 @@ typedef struct MPS2MachineState MPS2MachineState;
 #define TYPE_MPS2_MACHINE "mps2"
 #define TYPE_MPS2_AN385_MACHINE MACHINE_TYPE_NAME("mps2-an385")
 #define TYPE_MPS2_AN386_MACHINE MACHINE_TYPE_NAME("mps2-an386")
+#define TYPE_MPS2_AN500_MACHINE MACHINE_TYPE_NAME("mps2-an500")
 #define TYPE_MPS2_AN511_MACHINE MACHINE_TYPE_NAME("mps2-an511")
 
 DECLARE_OBJ_CHECKERS(MPS2MachineState, MPS2MachineClass,
@@ -144,11 +150,12 @@ static void mps2_common_init(MachineState *machine)
      *
      * AN385/AN386/AN511:
      *  0x21000000 .. 0x21ffffff : PSRAM (16MB)
-     * AN385/AN386 only:
+     * AN385/AN386/AN500:
      *  0x00000000 .. 0x003fffff : ZBT SSRAM1
      *  0x00400000 .. 0x007fffff : mirror of ZBT SSRAM1
      *  0x20000000 .. 0x203fffff : ZBT SSRAM 2&3
      *  0x20400000 .. 0x207fffff : mirror of ZBT SSRAM 2&3
+     * AN385/AN386 only:
      *  0x01000000 .. 0x01003fff : block RAM (16K)
      *  0x01004000 .. 0x01007fff : mirror of above
      *  0x01008000 .. 0x0100bfff : mirror of above
@@ -158,29 +165,35 @@ static void mps2_common_init(MachineState *machine)
      *  0x00400000 .. 0x007fffff : ZBT SSRAM1
      *  0x20000000 .. 0x2001ffff : SRAM
      *  0x20400000 .. 0x207fffff : ZBT SSRAM 2&3
+     * AN500 only:
+     *  0x60000000 .. 0x60ffffff : PSRAM (16MB)
      *
      * The AN385/AN386 has a feature where the lowest 16K can be mapped
      * either to the bottom of the ZBT SSRAM1 or to the block RAM.
      * This is of no use for QEMU so we don't implement it (as if
      * zbt_boot_ctrl is always zero).
      */
-    memory_region_add_subregion(system_memory, 0x21000000, machine->ram);
+    memory_region_add_subregion(system_memory, mmc->psram_base, machine->ram);
+
+    if (mmc->has_block_ram) {
+        make_ram(&mms->blockram, "mps.blockram", 0x01000000, 0x4000);
+        make_ram_alias(&mms->blockram_m1, "mps.blockram_m1",
+                       &mms->blockram, 0x01004000);
+        make_ram_alias(&mms->blockram_m2, "mps.blockram_m2",
+                       &mms->blockram, 0x01008000);
+        make_ram_alias(&mms->blockram_m3, "mps.blockram_m3",
+                       &mms->blockram, 0x0100c000);
+    }
 
     switch (mmc->fpga_type) {
     case FPGA_AN385:
     case FPGA_AN386:
+    case FPGA_AN500:
         make_ram(&mms->ssram1, "mps.ssram1", 0x0, 0x400000);
         make_ram_alias(&mms->ssram1_m, "mps.ssram1_m", &mms->ssram1, 0x400000);
         make_ram(&mms->ssram23, "mps.ssram23", 0x20000000, 0x400000);
         make_ram_alias(&mms->ssram23_m, "mps.ssram23_m",
                        &mms->ssram23, 0x20400000);
-        make_ram(&mms->blockram, "mps.blockram", 0x01000000, 0x4000);
-        make_ram_alias(&mms->blockram_m1, "mps.blockram_m1",
-                       &mms->blockram, 0x01004000);
-        make_ram_alias(&mms->blockram_m2, "mps.blockram_m2",
-                       &mms->blockram, 0x01008000);
-        make_ram_alias(&mms->blockram_m3, "mps.blockram_m3",
-                       &mms->blockram, 0x0100c000);
         break;
     case FPGA_AN511:
         make_ram(&mms->blockram, "mps.blockram", 0x0, 0x40000);
@@ -197,6 +210,7 @@ static void mps2_common_init(MachineState *machine)
     switch (mmc->fpga_type) {
     case FPGA_AN385:
     case FPGA_AN386:
+    case FPGA_AN500:
         qdev_prop_set_uint32(armv7m, "num-irq", 32);
         break;
     case FPGA_AN511:
@@ -234,6 +248,7 @@ static void mps2_common_init(MachineState *machine)
     switch (mmc->fpga_type) {
     case FPGA_AN385:
     case FPGA_AN386:
+    case FPGA_AN500:
     {
         /* The overflow IRQs for UARTs 0, 1 and 2 are ORed together.
          * Overflow for UARTs 4 and 5 doesn't trigger any interrupt.
@@ -383,7 +398,7 @@ static void mps2_common_init(MachineState *machine)
     /* In hardware this is a LAN9220; the LAN9118 is software compatible
      * except that it doesn't support the checksum-offload feature.
      */
-    lan9118_init(&nd_table[0], 0x40200000,
+    lan9118_init(&nd_table[0], mmc->ethernet_base,
                  qdev_get_gpio_in(armv7m,
                                   mmc->fpga_type == FPGA_AN511 ? 47 : 13));
 
@@ -412,6 +427,9 @@ static void mps2_an385_class_init(ObjectClass *oc, void *data)
     mmc->fpga_type = FPGA_AN385;
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
     mmc->scc_id = 0x41043850;
+    mmc->psram_base = 0x21000000;
+    mmc->ethernet_base = 0x40200000;
+    mmc->has_block_ram = true;
 }
 
 static void mps2_an386_class_init(ObjectClass *oc, void *data)
@@ -423,6 +441,23 @@ static void mps2_an386_class_init(ObjectClass *oc, void *data)
     mmc->fpga_type = FPGA_AN386;
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m4");
     mmc->scc_id = 0x41043860;
+    mmc->psram_base = 0x21000000;
+    mmc->ethernet_base = 0x40200000;
+    mmc->has_block_ram = true;
+}
+
+static void mps2_an500_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+    MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc);
+
+    mc->desc = "ARM MPS2 with AN500 FPGA image for Cortex-M7";
+    mmc->fpga_type = FPGA_AN500;
+    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m7");
+    mmc->scc_id = 0x41045000;
+    mmc->psram_base = 0x60000000;
+    mmc->ethernet_base = 0xa0000000;
+    mmc->has_block_ram = false;
 }
 
 static void mps2_an511_class_init(ObjectClass *oc, void *data)
@@ -434,6 +469,9 @@ static void mps2_an511_class_init(ObjectClass *oc, void *data)
     mmc->fpga_type = FPGA_AN511;
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
     mmc->scc_id = 0x41045110;
+    mmc->psram_base = 0x21000000;
+    mmc->ethernet_base = 0x40200000;
+    mmc->has_block_ram = false;
 }
 
 static const TypeInfo mps2_info = {
@@ -457,6 +495,12 @@ static const TypeInfo mps2_an386_info = {
     .class_init = mps2_an386_class_init,
 };
 
+static const TypeInfo mps2_an500_info = {
+    .name = TYPE_MPS2_AN500_MACHINE,
+    .parent = TYPE_MPS2_MACHINE,
+    .class_init = mps2_an500_class_init,
+};
+
 static const TypeInfo mps2_an511_info = {
     .name = TYPE_MPS2_AN511_MACHINE,
     .parent = TYPE_MPS2_MACHINE,
@@ -468,6 +512,7 @@ static void mps2_machine_init(void)
     type_register_static(&mps2_info);
     type_register_static(&mps2_an385_info);
     type_register_static(&mps2_an386_info);
+    type_register_static(&mps2_an500_info);
     type_register_static(&mps2_an511_info);
 }