/* * ARM V2M MPS2 board emulation. * * Copyright (c) 2017 Linaro Limited * Written by Peter Maydell * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 or * (at your option) any later version. */ /* The MPS2 and MPS2+ dev boards are FPGA based (the 2+ has a bigger * FPGA but is otherwise the same as the 2). Since the CPU itself * and most of the devices are in the FPGA, the details of the board * as seen by the guest depend significantly on the FPGA image. * We model the following FPGA images: * "mps2-an385" -- Cortex-M3 as documented in ARM Application Note AN385 * "mps2-an511" -- Cortex-M3 'DesignStart' as documented in AN511 * * Links to the TRM for the board itself and to the various Application * Notes which document the FPGA images can be found here: * https://developer.arm.com/products/system-design/development-boards/cortex-m-prototyping-system */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qemu/error-report.h" #include "hw/arm/arm.h" #include "hw/arm/armv7m.h" #include "hw/or-irq.h" #include "hw/boards.h" #include "exec/address-spaces.h" #include "sysemu/sysemu.h" #include "hw/misc/unimp.h" #include "hw/char/cmsdk-apb-uart.h" typedef enum MPS2FPGAType { FPGA_AN385, FPGA_AN511, } MPS2FPGAType; typedef struct { MachineClass parent; MPS2FPGAType fpga_type; const char *cpu_model; } MPS2MachineClass; typedef struct { MachineState parent; ARMv7MState armv7m; MemoryRegion psram; MemoryRegion ssram1; MemoryRegion ssram1_m; MemoryRegion ssram23; MemoryRegion ssram23_m; MemoryRegion blockram; MemoryRegion blockram_m1; MemoryRegion blockram_m2; MemoryRegion blockram_m3; MemoryRegion sram; } MPS2MachineState; #define TYPE_MPS2_MACHINE "mps2" #define TYPE_MPS2_AN385_MACHINE MACHINE_TYPE_NAME("mps2-an385") #define TYPE_MPS2_AN511_MACHINE MACHINE_TYPE_NAME("mps2-an511") #define MPS2_MACHINE(obj) \ OBJECT_CHECK(MPS2MachineState, obj, TYPE_MPS2_MACHINE) #define MPS2_MACHINE_GET_CLASS(obj) \ OBJECT_GET_CLASS(MPS2MachineClass, obj, TYPE_MPS2_MACHINE) #define MPS2_MACHINE_CLASS(klass) \ OBJECT_CLASS_CHECK(MPS2MachineClass, klass, TYPE_MPS2_MACHINE) /* Main SYSCLK frequency in Hz */ #define SYSCLK_FRQ 25000000 /* Initialize the auxiliary RAM region @mr and map it into * the memory map at @base. */ static void make_ram(MemoryRegion *mr, const char *name, hwaddr base, hwaddr size) { memory_region_init_ram(mr, NULL, name, size, &error_fatal); memory_region_add_subregion(get_system_memory(), base, mr); } /* Create an alias of an entire original MemoryRegion @orig * located at @base in the memory map. */ static void make_ram_alias(MemoryRegion *mr, const char *name, MemoryRegion *orig, hwaddr base) { memory_region_init_alias(mr, NULL, name, orig, 0, memory_region_size(orig)); memory_region_add_subregion(get_system_memory(), base, mr); } static void mps2_common_init(MachineState *machine) { MPS2MachineState *mms = MPS2_MACHINE(machine); MPS2MachineClass *mmc = MPS2_MACHINE_GET_CLASS(machine); MemoryRegion *system_memory = get_system_memory(); DeviceState *armv7m; if (!machine->cpu_model) { machine->cpu_model = mmc->cpu_model; } if (strcmp(machine->cpu_model, mmc->cpu_model) != 0) { error_report("This board can only be used with CPU %s", mmc->cpu_model); exit(1); } /* The FPGA images have an odd combination of different RAMs, * because in hardware they are different implementations and * connected to different buses, giving varying performance/size * tradeoffs. For QEMU they're all just RAM, though. We arbitrarily * call the 16MB our "system memory", as it's the largest lump. * * Common to both boards: * 0x21000000..0x21ffffff : PSRAM (16MB) * AN385 only: * 0x00000000 .. 0x003fffff : ZBT SSRAM1 * 0x00400000 .. 0x007fffff : mirror of ZBT SSRAM1 * 0x20000000 .. 0x203fffff : ZBT SSRAM 2&3 * 0x20400000 .. 0x207fffff : mirror of ZBT SSRAM 2&3 * 0x01000000 .. 0x01003fff : block RAM (16K) * 0x01004000 .. 0x01007fff : mirror of above * 0x01008000 .. 0x0100bfff : mirror of above * 0x0100c000 .. 0x0100ffff : mirror of above * AN511 only: * 0x00000000 .. 0x0003ffff : FPGA block RAM * 0x00400000 .. 0x007fffff : ZBT SSRAM1 * 0x20000000 .. 0x2001ffff : SRAM * 0x20400000 .. 0x207fffff : ZBT SSRAM 2&3 * * The AN385 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_allocate_system_memory(&mms->psram, NULL, "mps.ram", 0x1000000); memory_region_add_subregion(system_memory, 0x21000000, &mms->psram); switch (mmc->fpga_type) { case FPGA_AN385: 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); make_ram(&mms->ssram1, "mps.ssram1", 0x00400000, 0x00800000); make_ram(&mms->sram, "mps.sram", 0x20000000, 0x20000); make_ram(&mms->ssram23, "mps.ssram23", 0x20400000, 0x400000); break; default: g_assert_not_reached(); } object_initialize(&mms->armv7m, sizeof(mms->armv7m), TYPE_ARMV7M); armv7m = DEVICE(&mms->armv7m); qdev_set_parent_bus(armv7m, sysbus_get_default()); switch (mmc->fpga_type) { case FPGA_AN385: qdev_prop_set_uint32(armv7m, "num-irq", 32); break; case FPGA_AN511: qdev_prop_set_uint32(armv7m, "num-irq", 64); break; default: g_assert_not_reached(); } qdev_prop_set_string(armv7m, "cpu-model", machine->cpu_model); object_property_set_link(OBJECT(&mms->armv7m), OBJECT(system_memory), "memory", &error_abort); object_property_set_bool(OBJECT(&mms->armv7m), true, "realized", &error_fatal); create_unimplemented_device("zbtsmram mirror", 0x00400000, 0x00400000); create_unimplemented_device("RESERVED 1", 0x00800000, 0x00800000); create_unimplemented_device("Block RAM", 0x01000000, 0x00010000); create_unimplemented_device("RESERVED 2", 0x01010000, 0x1EFF0000); create_unimplemented_device("RESERVED 3", 0x20800000, 0x00800000); create_unimplemented_device("PSRAM", 0x21000000, 0x01000000); /* These three ranges all cover multiple devices; we may implement * some of them below (in which case the real device takes precedence * over the unimplemented-region mapping). */ create_unimplemented_device("CMSDK APB peripheral region @0x40000000", 0x40000000, 0x00010000); create_unimplemented_device("CMSDK peripheral region @0x40010000", 0x40010000, 0x00010000); create_unimplemented_device("Extra peripheral region @0x40020000", 0x40020000, 0x00010000); create_unimplemented_device("RESERVED 4", 0x40030000, 0x001D0000); create_unimplemented_device("Ethernet", 0x40200000, 0x00100000); create_unimplemented_device("VGA", 0x41000000, 0x0200000); switch (mmc->fpga_type) { case FPGA_AN385: { /* The overflow IRQs for UARTs 0, 1 and 2 are ORed together. * Overflow for UARTs 4 and 5 doesn't trigger any interrupt. */ Object *orgate; DeviceState *orgate_dev; int i; orgate = object_new(TYPE_OR_IRQ); object_property_set_int(orgate, 6, "num-lines", &error_fatal); object_property_set_bool(orgate, true, "realized", &error_fatal); orgate_dev = DEVICE(orgate); qdev_connect_gpio_out(orgate_dev, 0, qdev_get_gpio_in(armv7m, 12)); for (i = 0; i < 5; i++) { static const hwaddr uartbase[] = {0x40004000, 0x40005000, 0x40006000, 0x40007000, 0x40009000}; Chardev *uartchr = i < MAX_SERIAL_PORTS ? serial_hds[i] : NULL; /* RX irq number; TX irq is always one greater */ static const int uartirq[] = {0, 2, 4, 18, 20}; qemu_irq txovrint = NULL, rxovrint = NULL; if (i < 3) { txovrint = qdev_get_gpio_in(orgate_dev, i * 2); rxovrint = qdev_get_gpio_in(orgate_dev, i * 2 + 1); } cmsdk_apb_uart_create(uartbase[i], qdev_get_gpio_in(armv7m, uartirq[i] + 1), qdev_get_gpio_in(armv7m, uartirq[i]), txovrint, rxovrint, NULL, uartchr, SYSCLK_FRQ); } break; } case FPGA_AN511: { /* The overflow IRQs for all UARTs are ORed together. * Tx and Rx IRQs for each UART are ORed together. */ Object *orgate; DeviceState *orgate_dev; int i; orgate = object_new(TYPE_OR_IRQ); object_property_set_int(orgate, 10, "num-lines", &error_fatal); object_property_set_bool(orgate, true, "realized", &error_fatal); orgate_dev = DEVICE(orgate); qdev_connect_gpio_out(orgate_dev, 0, qdev_get_gpio_in(armv7m, 12)); for (i = 0; i < 5; i++) { /* system irq numbers for the combined tx/rx for each UART */ static const int uart_txrx_irqno[] = {0, 2, 45, 46, 56}; static const hwaddr uartbase[] = {0x40004000, 0x40005000, 0x4002c000, 0x4002d000, 0x4002e000}; Chardev *uartchr = i < MAX_SERIAL_PORTS ? serial_hds[i] : NULL; Object *txrx_orgate; DeviceState *txrx_orgate_dev; txrx_orgate = object_new(TYPE_OR_IRQ); object_property_set_int(txrx_orgate, 2, "num-lines", &error_fatal); object_property_set_bool(txrx_orgate, true, "realized", &error_fatal); txrx_orgate_dev = DEVICE(txrx_orgate); qdev_connect_gpio_out(txrx_orgate_dev, 0, qdev_get_gpio_in(armv7m, uart_txrx_irqno[i])); cmsdk_apb_uart_create(uartbase[i], qdev_get_gpio_in(txrx_orgate_dev, 0), qdev_get_gpio_in(txrx_orgate_dev, 1), qdev_get_gpio_in(orgate_dev, 0), qdev_get_gpio_in(orgate_dev, 1), NULL, uartchr, SYSCLK_FRQ); } break; } default: g_assert_not_reached(); } system_clock_scale = NANOSECONDS_PER_SECOND / SYSCLK_FRQ; armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename, 0x400000); } static void mps2_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); mc->init = mps2_common_init; mc->max_cpus = 1; } static void mps2_an385_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc); mc->desc = "ARM MPS2 with AN385 FPGA image for Cortex-M3"; mmc->fpga_type = FPGA_AN385; mmc->cpu_model = "cortex-m3"; } static void mps2_an511_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); MPS2MachineClass *mmc = MPS2_MACHINE_CLASS(oc); mc->desc = "ARM MPS2 with AN511 DesignStart FPGA image for Cortex-M3"; mmc->fpga_type = FPGA_AN511; mmc->cpu_model = "cortex-m3"; } static const TypeInfo mps2_info = { .name = TYPE_MPS2_MACHINE, .parent = TYPE_MACHINE, .abstract = true, .instance_size = sizeof(MPS2MachineState), .class_size = sizeof(MPS2MachineClass), .class_init = mps2_class_init, }; static const TypeInfo mps2_an385_info = { .name = TYPE_MPS2_AN385_MACHINE, .parent = TYPE_MPS2_MACHINE, .class_init = mps2_an385_class_init, }; static const TypeInfo mps2_an511_info = { .name = TYPE_MPS2_AN511_MACHINE, .parent = TYPE_MPS2_MACHINE, .class_init = mps2_an511_class_init, }; static void mps2_machine_init(void) { type_register_static(&mps2_info); type_register_static(&mps2_an385_info); type_register_static(&mps2_an511_info); } type_init(mps2_machine_init);