diff options
Diffstat (limited to 'hw/sparc/leon3.c')
| -rw-r--r-- | hw/sparc/leon3.c | 157 |
1 files changed, 141 insertions, 16 deletions
diff --git a/hw/sparc/leon3.c b/hw/sparc/leon3.c index 0383b17c29..bdead85a93 100644 --- a/hw/sparc/leon3.c +++ b/hw/sparc/leon3.c @@ -1,7 +1,7 @@ /* * QEMU Leon3 System Emulator * - * Copyright (c) 2010-2011 AdaCore + * Copyright (c) 2010-2019 AdaCore * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -39,20 +39,88 @@ #include "exec/address-spaces.h" #include "hw/sparc/grlib.h" +#include "hw/misc/grlib_ahb_apb_pnp.h" /* Default system clock. */ #define CPU_CLK (40 * 1000 * 1000) -#define PROM_FILENAME "u-boot.bin" +#define LEON3_PROM_FILENAME "u-boot.bin" +#define LEON3_PROM_OFFSET (0x00000000) +#define LEON3_RAM_OFFSET (0x40000000) #define MAX_PILS 16 +#define LEON3_UART_OFFSET (0x80000100) +#define LEON3_UART_IRQ (3) + +#define LEON3_IRQMP_OFFSET (0x80000200) + +#define LEON3_TIMER_OFFSET (0x80000300) +#define LEON3_TIMER_IRQ (6) +#define LEON3_TIMER_COUNT (2) + +#define LEON3_APB_PNP_OFFSET (0x800FF000) +#define LEON3_AHB_PNP_OFFSET (0xFFFFF000) + typedef struct ResetData { SPARCCPU *cpu; uint32_t entry; /* save kernel entry in case of reset */ target_ulong sp; /* initial stack pointer */ } ResetData; +static uint32_t *gen_store_u32(uint32_t *code, hwaddr addr, uint32_t val) +{ + stl_p(code++, 0x82100000); /* mov %g0, %g1 */ + stl_p(code++, 0x84100000); /* mov %g0, %g2 */ + stl_p(code++, 0x03000000 + + extract32(addr, 10, 22)); + /* sethi %hi(addr), %g1 */ + stl_p(code++, 0x82106000 + + extract32(addr, 0, 10)); + /* or %g1, addr, %g1 */ + stl_p(code++, 0x05000000 + + extract32(val, 10, 22)); + /* sethi %hi(val), %g2 */ + stl_p(code++, 0x8410a000 + + extract32(val, 0, 10)); + /* or %g2, val, %g2 */ + stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ] */ + + return code; +} + +/* + * When loading a kernel in RAM the machine is expected to be in a different + * state (eg: initialized by the bootloader). This little code reproduces + * this behavior. + */ +static void write_bootloader(CPUSPARCState *env, uint8_t *base, + hwaddr kernel_addr) +{ + uint32_t *p = (uint32_t *) base; + + /* Initialize the UARTs */ + /* *UART_CONTROL = UART_RECEIVE_ENABLE | UART_TRANSMIT_ENABLE; */ + p = gen_store_u32(p, 0x80000108, 3); + + /* Initialize the TIMER 0 */ + /* *GPTIMER_SCALER_RELOAD = 40 - 1; */ + p = gen_store_u32(p, 0x80000304, 39); + /* *GPTIMER0_COUNTER_RELOAD = 0xFFFE; */ + p = gen_store_u32(p, 0x80000314, 0xFFFFFFFE); + /* *GPTIMER0_CONFIG = GPTIMER_ENABLE | GPTIMER_RESTART; */ + p = gen_store_u32(p, 0x80000318, 3); + + /* JUMP to the entry point */ + stl_p(p++, 0x82100000); /* mov %g0, %g1 */ + stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22)); + /* sethi %hi(kernel_addr), %g1 */ + stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10)); + /* or kernel_addr, %g1 */ + stl_p(p++, 0x81c04000); /* jmp %g1 */ + stl_p(p++, 0x01000000); /* nop */ +} + static void main_cpu_reset(void *opaque) { ResetData *s = (ResetData *)opaque; @@ -121,6 +189,10 @@ static void leon3_generic_hw_init(MachineState *machine) int bios_size; int prom_size; ResetData *reset_info; + DeviceState *dev; + int i; + AHBPnp *ahb_pnp; + APBPnp *apb_pnp; /* Init CPU */ cpu = SPARC_CPU(cpu_create(machine->cpu_type)); @@ -131,13 +203,35 @@ static void leon3_generic_hw_init(MachineState *machine) /* Reset data */ reset_info = g_malloc0(sizeof(ResetData)); reset_info->cpu = cpu; - reset_info->sp = 0x40000000 + ram_size; + reset_info->sp = LEON3_RAM_OFFSET + ram_size; qemu_register_reset(main_cpu_reset, reset_info); - /* Allocate IRQ manager */ - grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in); + ahb_pnp = GRLIB_AHB_PNP(object_new(TYPE_GRLIB_AHB_PNP)); + object_property_set_bool(OBJECT(ahb_pnp), true, "realized", &error_fatal); + sysbus_mmio_map(SYS_BUS_DEVICE(ahb_pnp), 0, LEON3_AHB_PNP_OFFSET); + grlib_ahb_pnp_add_entry(ahb_pnp, 0, 0, GRLIB_VENDOR_GAISLER, + GRLIB_LEON3_DEV, GRLIB_AHB_MASTER, + GRLIB_CPU_AREA); + apb_pnp = GRLIB_APB_PNP(object_new(TYPE_GRLIB_APB_PNP)); + object_property_set_bool(OBJECT(apb_pnp), true, "realized", &error_fatal); + sysbus_mmio_map(SYS_BUS_DEVICE(apb_pnp), 0, LEON3_APB_PNP_OFFSET); + grlib_ahb_pnp_add_entry(ahb_pnp, LEON3_APB_PNP_OFFSET, 0xFFF, + GRLIB_VENDOR_GAISLER, GRLIB_APBMST_DEV, + GRLIB_AHB_SLAVE, GRLIB_AHBMEM_AREA); + + /* Allocate IRQ manager */ + dev = qdev_create(NULL, TYPE_GRLIB_IRQMP); + qdev_prop_set_ptr(dev, "set_pil_in", leon3_set_pil_in); + qdev_prop_set_ptr(dev, "set_pil_in_opaque", env); + qdev_init_nofail(dev); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_IRQMP_OFFSET); + env->irq_manager = dev; env->qemu_irq_ack = leon3_irq_manager; + cpu_irqs = qemu_allocate_irqs(grlib_irqmp_set_irq, dev, MAX_PILS); + grlib_apb_pnp_add_entry(apb_pnp, LEON3_IRQMP_OFFSET, 0xFFF, + GRLIB_VENDOR_GAISLER, GRLIB_IRQMP_DEV, + 2, 0, GRLIB_APBIO_AREA); /* Allocate RAM */ if (ram_size > 1 * GiB) { @@ -148,17 +242,17 @@ static void leon3_generic_hw_init(MachineState *machine) } memory_region_allocate_system_memory(ram, NULL, "leon3.ram", ram_size); - memory_region_add_subregion(address_space_mem, 0x40000000, ram); + memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET, ram); /* Allocate BIOS */ prom_size = 8 * MiB; memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size, &error_fatal); memory_region_set_readonly(prom, true); - memory_region_add_subregion(address_space_mem, 0x00000000, prom); + memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom); /* Load boot prom */ if (bios_name == NULL) { - bios_name = PROM_FILENAME; + bios_name = LEON3_PROM_FILENAME; } filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); @@ -174,13 +268,15 @@ static void leon3_generic_hw_init(MachineState *machine) } if (bios_size > 0) { - ret = load_image_targphys(filename, 0x00000000, bios_size); + ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size); if (ret < 0 || ret > prom_size) { error_report("could not load prom '%s'", filename); exit(1); } } else if (kernel_filename == NULL && !qtest_enabled()) { - error_report("Can't read bios image %s", filename); + error_report("Can't read bios image '%s'", filename + ? filename + : LEON3_PROM_FILENAME); exit(1); } g_free(filename); @@ -202,19 +298,48 @@ static void leon3_generic_hw_init(MachineState *machine) exit(1); } if (bios_size <= 0) { - /* If there is no bios/monitor, start the application. */ - env->pc = entry; - env->npc = entry + 4; - reset_info->entry = entry; + /* + * If there is no bios/monitor just start the application but put + * the machine in an initialized state through a little + * bootloader. + */ + uint8_t *bootloader_entry; + + bootloader_entry = memory_region_get_ram_ptr(prom); + write_bootloader(env, bootloader_entry, entry); + env->pc = LEON3_PROM_OFFSET; + env->npc = LEON3_PROM_OFFSET + 4; + reset_info->entry = LEON3_PROM_OFFSET; } } /* Allocate timers */ - grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6); + dev = qdev_create(NULL, TYPE_GRLIB_GPTIMER); + qdev_prop_set_uint32(dev, "nr-timers", LEON3_TIMER_COUNT); + qdev_prop_set_uint32(dev, "frequency", CPU_CLK); + qdev_prop_set_uint32(dev, "irq-line", LEON3_TIMER_IRQ); + qdev_init_nofail(dev); + + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_TIMER_OFFSET); + for (i = 0; i < LEON3_TIMER_COUNT; i++) { + sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, + cpu_irqs[LEON3_TIMER_IRQ + i]); + } + + grlib_apb_pnp_add_entry(apb_pnp, LEON3_TIMER_OFFSET, 0xFFF, + GRLIB_VENDOR_GAISLER, GRLIB_GPTIMER_DEV, + 0, LEON3_TIMER_IRQ, GRLIB_APBIO_AREA); /* Allocate uart */ if (serial_hd(0)) { - grlib_apbuart_create(0x80000100, serial_hd(0), cpu_irqs[3]); + dev = qdev_create(NULL, TYPE_GRLIB_APB_UART); + qdev_prop_set_chr(dev, "chrdev", serial_hd(0)); + qdev_init_nofail(dev); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_UART_OFFSET); + sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, cpu_irqs[LEON3_UART_IRQ]); + grlib_apb_pnp_add_entry(apb_pnp, LEON3_UART_OFFSET, 0xFFF, + GRLIB_VENDOR_GAISLER, GRLIB_APBUART_DEV, 1, + LEON3_UART_IRQ, GRLIB_APBIO_AREA); } } |