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qemu/hw/ppc/sam460ex.c
Paolo Bonzini 3ab78f3dbe hw/ppc/sam460ex: do not use usb_bus_find() 
usb_bus_find() is always used with argument -1; it can be replaced with
a search of the single USB bus on the machine.

Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20240223124406.234509-3-pbonzini@redhat.com>
[PMD: Fixed style]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-27 09:37:03 +01:00

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/*
* QEMU aCube Sam460ex board emulation
*
* Copyright (c) 2012 François Revol
* Copyright (c) 2016-2019 BALATON Zoltan
*
* This file is derived from hw/ppc440_bamboo.c,
* the copyright for that material belongs to the original owners.
*
* This work is licensed under the GNU GPL license version 2 or later.
*
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/datadir.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/boards.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "sysemu/device_tree.h"
#include "sysemu/block-backend.h"
#include "hw/loader.h"
#include "elf.h"
#include "exec/memory.h"
#include "ppc440.h"
#include "hw/pci-host/ppc4xx.h"
#include "hw/block/flash.h"
#include "sysemu/sysemu.h"
#include "sysemu/reset.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "hw/i2c/ppc4xx_i2c.h"
#include "hw/i2c/smbus_eeprom.h"
#include "hw/usb/hcd-ehci.h"
#include "hw/ppc/fdt.h"
#include "hw/qdev-properties.h"
#include "hw/intc/ppc-uic.h"
#include <libfdt.h>
#define BINARY_DEVICE_TREE_FILE "canyonlands.dtb"
#define UBOOT_FILENAME "u-boot-sam460-20100605.bin"
/* to extract the official U-Boot bin from the updater: */
/* dd bs=1 skip=$(($(stat -c '%s' updater/updater-460) - 0x80000)) \
if=updater/updater-460 of=u-boot-sam460-20100605.bin */
#define PCIE0_DCRN_BASE 0x100
#define PCIE1_DCRN_BASE 0x120
/* from Sam460 U-Boot include/configs/Sam460ex.h */
#define FLASH_BASE 0xfff00000
#define FLASH_BASE_H 0x4
#define FLASH_SIZE (1 * MiB)
#define UBOOT_LOAD_BASE 0xfff80000
#define UBOOT_SIZE 0x00080000
#define UBOOT_ENTRY 0xfffffffc
/* from U-Boot */
#define EPAPR_MAGIC (0x45504150)
#define KERNEL_ADDR 0x1000000
#define FDT_ADDR 0x1800000
#define RAMDISK_ADDR 0x1900000
/* Sam460ex IRQ MAP:
IRQ0 = ETH_INT
IRQ1 = FPGA_INT
IRQ2 = PCI_INT (PCIA, PCIB, PCIC, PCIB)
IRQ3 = FPGA_INT2
IRQ11 = RTC_INT
IRQ12 = SM502_INT
*/
#define CPU_FREQ 1150000000
#define PLB_FREQ 230000000
#define OPB_FREQ 115000000
#define EBC_FREQ 115000000
#define UART_FREQ 11059200
struct boot_info {
uint32_t dt_base;
uint32_t dt_size;
uint32_t entry;
};
static int sam460ex_load_uboot(void)
{
/*
* This first creates 1MiB of flash memory mapped at the end of
* the 32-bit address space (0xFFF00000..0xFFFFFFFF).
*
* If_PFLASH unit 0 is defined, the flash memory is initialized
* from that block backend.
*
* Else, it's initialized to zero. And then 512KiB of ROM get
* mapped on top of its second half (0xFFF80000..0xFFFFFFFF),
* initialized from u-boot-sam460-20100605.bin.
*
* This doesn't smell right.
*
* The physical hardware appears to have 512KiB flash memory.
*
* TODO Figure out what we really need here, and clean this up.
*/
DriveInfo *dinfo;
dinfo = drive_get(IF_PFLASH, 0, 0);
if (!pflash_cfi01_register(FLASH_BASE | ((hwaddr)FLASH_BASE_H << 32),
"sam460ex.flash", FLASH_SIZE,
dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
64 * KiB, 1, 0x89, 0x18, 0x0000, 0x0, 1)) {
error_report("Error registering flash memory");
/* XXX: return an error instead? */
exit(1);
}
if (!dinfo) {
/*error_report("No flash image given with the 'pflash' parameter,"
" using default u-boot image");*/
rom_add_file_fixed(UBOOT_FILENAME,
UBOOT_LOAD_BASE | ((hwaddr)FLASH_BASE_H << 32),
-1);
}
return 0;
}
static int sam460ex_load_device_tree(MachineState *machine,
hwaddr addr,
hwaddr initrd_base,
hwaddr initrd_size)
{
uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(machine->ram_size) };
char *filename;
int fdt_size;
void *fdt;
uint32_t tb_freq = CPU_FREQ;
uint32_t clock_freq = CPU_FREQ;
int offset;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (!filename) {
error_report("Couldn't find dtb file `%s'", BINARY_DEVICE_TREE_FILE);
exit(1);
}
fdt = load_device_tree(filename, &fdt_size);
if (!fdt) {
error_report("Couldn't load dtb file `%s'", filename);
g_free(filename);
exit(1);
}
g_free(filename);
/* Manipulate device tree in memory. */
qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
sizeof(mem_reg_property));
/* default FDT doesn't have a /chosen node... */
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", initrd_base);
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
(initrd_base + initrd_size));
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
machine->kernel_cmdline);
/* Copy data from the host device tree into the guest. Since the guest can
* directly access the timebase without host involvement, we must expose
* the correct frequencies. */
if (kvm_enabled()) {
tb_freq = kvmppc_get_tbfreq();
clock_freq = kvmppc_get_clockfreq();
}
qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
clock_freq);
qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
tb_freq);
/* Remove cpm node if it exists (it is not emulated) */
offset = fdt_path_offset(fdt, "/cpm");
if (offset >= 0) {
_FDT(fdt_nop_node(fdt, offset));
}
/* set serial port clocks */
offset = fdt_node_offset_by_compatible(fdt, -1, "ns16550");
while (offset >= 0) {
_FDT(fdt_setprop_cell(fdt, offset, "clock-frequency", UART_FREQ));
offset = fdt_node_offset_by_compatible(fdt, offset, "ns16550");
}
/* some more clocks */
qemu_fdt_setprop_cell(fdt, "/plb", "clock-frequency",
PLB_FREQ);
qemu_fdt_setprop_cell(fdt, "/plb/opb", "clock-frequency",
OPB_FREQ);
qemu_fdt_setprop_cell(fdt, "/plb/opb/ebc", "clock-frequency",
EBC_FREQ);
rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
/* Set machine->fdt for 'dumpdtb' QMP/HMP command */
machine->fdt = fdt;
return fdt_size;
}
/* Create reset TLB entries for BookE, mapping only the flash memory. */
static void mmubooke_create_initial_mapping_uboot(CPUPPCState *env)
{
ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
/* on reset the flash is mapped by a shadow TLB,
* but since we don't implement them we need to use
* the same values U-Boot will use to avoid a fault.
*/
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 0x10000000; /* up to 0xffffffff */
tlb->EPN = 0xf0000000 & TARGET_PAGE_MASK;
tlb->RPN = (0xf0000000 & TARGET_PAGE_MASK) | 0x4;
tlb->PID = 0;
}
/* Create reset TLB entries for BookE, spanning the 32bit addr space. */
static void mmubooke_create_initial_mapping(CPUPPCState *env,
target_ulong va,
hwaddr pa)
{
ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 1 << 31; /* up to 0x80000000 */
tlb->EPN = va & TARGET_PAGE_MASK;
tlb->RPN = pa & TARGET_PAGE_MASK;
tlb->PID = 0;
}
static void main_cpu_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
struct boot_info *bi = env->load_info;
cpu_reset(CPU(cpu));
/* either we have a kernel to boot or we jump to U-Boot */
if (bi->entry != UBOOT_ENTRY) {
env->gpr[1] = (16 * MiB) - 8;
env->gpr[3] = FDT_ADDR;
env->nip = bi->entry;
/* Create a mapping for the kernel. */
mmubooke_create_initial_mapping(env, 0, 0);
env->gpr[6] = tswap32(EPAPR_MAGIC);
env->gpr[7] = (16 * MiB) - 8; /* bi->ima_size; */
} else {
env->nip = UBOOT_ENTRY;
mmubooke_create_initial_mapping_uboot(env);
}
}
static void sam460ex_init(MachineState *machine)
{
MemoryRegion *l2cache_ram = g_new(MemoryRegion, 1);
DeviceState *uic[4];
int i;
PCIBus *pci_bus;
USBBus *usb_bus;
PowerPCCPU *cpu;
CPUPPCState *env;
I2CBus *i2c;
hwaddr entry = UBOOT_ENTRY;
target_long initrd_size = 0;
DeviceState *dev;
SysBusDevice *sbdev;
struct boot_info *boot_info;
uint8_t *spd_data;
int success;
cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
env = &cpu->env;
if (env->mmu_model != POWERPC_MMU_BOOKE) {
error_report("Only MMU model BookE is supported by this machine.");
exit(1);
}
qemu_register_reset(main_cpu_reset, cpu);
boot_info = g_malloc0(sizeof(*boot_info));
env->load_info = boot_info;
ppc_booke_timers_init(cpu, CPU_FREQ, 0);
ppc_dcr_init(env, NULL, NULL);
/* PLB arbitrer */
dev = qdev_new(TYPE_PPC4xx_PLB);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
object_unref(OBJECT(dev));
/* interrupt controllers */
for (i = 0; i < ARRAY_SIZE(uic); i++) {
/*
* UICs 1, 2 and 3 are cascaded through UIC 0.
* input_ints[n] is the interrupt number on UIC 0 which
* the INT output of UIC n is connected to. The CINT output
* of UIC n connects to input_ints[n] + 1.
* The entry in input_ints[] for UIC 0 is ignored, because UIC 0's
* INT and CINT outputs are connected to the CPU.
*/
const int input_ints[] = { -1, 30, 10, 16 };
uic[i] = qdev_new(TYPE_PPC_UIC);
qdev_prop_set_uint32(uic[i], "dcr-base", 0xc0 + i * 0x10);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(uic[i]), cpu, &error_fatal);
object_unref(OBJECT(uic[i]));
sbdev = SYS_BUS_DEVICE(uic[i]);
if (i == 0) {
sysbus_connect_irq(sbdev, PPCUIC_OUTPUT_INT,
qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_INT));
sysbus_connect_irq(sbdev, PPCUIC_OUTPUT_CINT,
qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_CINT));
} else {
sysbus_connect_irq(sbdev, PPCUIC_OUTPUT_INT,
qdev_get_gpio_in(uic[0], input_ints[i]));
sysbus_connect_irq(sbdev, PPCUIC_OUTPUT_CINT,
qdev_get_gpio_in(uic[0], input_ints[i] + 1));
}
}
/* SDRAM controller */
/* The SoC could also handle 4 GiB but firmware does not work with that. */
if (machine->ram_size > 2 * GiB) {
error_report("Memory over 2 GiB is not supported");
exit(1);
}
/* Firmware needs at least 64 MiB */
if (machine->ram_size < 64 * MiB) {
error_report("Memory below 64 MiB is not supported");
exit(1);
}
dev = qdev_new(TYPE_PPC4xx_SDRAM_DDR2);
object_property_set_link(OBJECT(dev), "dram", OBJECT(machine->ram),
&error_abort);
/*
* Put all RAM on first bank because board has one slot
* and firmware only checks that
*/
object_property_set_int(OBJECT(dev), "nbanks", 1, &error_abort);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
object_unref(OBJECT(dev));
/* FIXME: does 460EX have ECC interrupts? */
/* Enable SDRAM memory regions as we may boot without firmware */
ppc4xx_sdram_ddr2_enable(PPC4xx_SDRAM_DDR2(dev));
/* IIC controllers and devices */
dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600700,
qdev_get_gpio_in(uic[0], 2));
i2c = PPC4xx_I2C(dev)->bus;
/* SPD EEPROM on RAM module */
spd_data = spd_data_generate(machine->ram_size < 128 * MiB ? DDR : DDR2,
machine->ram_size);
spd_data[20] = 4; /* SO-DIMM module */
smbus_eeprom_init_one(i2c, 0x50, spd_data);
/* RTC */
i2c_slave_create_simple(i2c, "m41t80", 0x68);
dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600800,
qdev_get_gpio_in(uic[0], 3));
/* External bus controller */
dev = qdev_new(TYPE_PPC4xx_EBC);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
object_unref(OBJECT(dev));
/* CPR */
ppc4xx_cpr_init(env);
/* PLB to AHB bridge */
ppc4xx_ahb_init(env);
/* System DCRs */
ppc4xx_sdr_init(env);
/* MAL */
dev = qdev_new(TYPE_PPC4xx_MAL);
qdev_prop_set_uint8(dev, "txc-num", 4);
qdev_prop_set_uint8(dev, "rxc-num", 16);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
object_unref(OBJECT(dev));
sbdev = SYS_BUS_DEVICE(dev);
for (i = 0; i < ARRAY_SIZE(PPC4xx_MAL(dev)->irqs); i++) {
sysbus_connect_irq(sbdev, i, qdev_get_gpio_in(uic[2], 3 + i));
}
/* DMA */
ppc4xx_dma_init(env, 0x200);
/* 256K of L2 cache as memory */
ppc4xx_l2sram_init(env);
/* FIXME: remove this after fixing l2sram mapping in ppc440_uc.c? */
memory_region_init_ram(l2cache_ram, NULL, "ppc440.l2cache_ram", 256 * KiB,
&error_abort);
memory_region_add_subregion(get_system_memory(), 0x400000000LL,
l2cache_ram);
/* USB */
sysbus_create_simple(TYPE_PPC4xx_EHCI, 0x4bffd0400,
qdev_get_gpio_in(uic[2], 29));
dev = qdev_new("sysbus-ohci");
qdev_prop_set_string(dev, "masterbus", "usb-bus.0");
qdev_prop_set_uint32(dev, "num-ports", 6);
sbdev = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(sbdev, &error_fatal);
sysbus_mmio_map(sbdev, 0, 0x4bffd0000);
sysbus_connect_irq(sbdev, 0, qdev_get_gpio_in(uic[2], 30));
usb_bus = USB_BUS(object_resolve_type_unambiguous(TYPE_USB_BUS,
&error_abort));
usb_create_simple(usb_bus, "usb-kbd");
usb_create_simple(usb_bus, "usb-mouse");
/* PCIe buses */
dev = qdev_new(TYPE_PPC460EX_PCIE_HOST);
qdev_prop_set_int32(dev, "busnum", 0);
qdev_prop_set_int32(dev, "dcrn-base", PCIE0_DCRN_BASE);
object_property_set_link(OBJECT(dev), "cpu", OBJECT(cpu), &error_abort);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
dev = qdev_new(TYPE_PPC460EX_PCIE_HOST);
qdev_prop_set_int32(dev, "busnum", 1);
qdev_prop_set_int32(dev, "dcrn-base", PCIE1_DCRN_BASE);
object_property_set_link(OBJECT(dev), "cpu", OBJECT(cpu), &error_abort);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
/* PCI bus */
/* All PCI irqs are connected to the same UIC pin (cf. UBoot source) */
dev = sysbus_create_simple(TYPE_PPC440_PCIX_HOST, 0xc0ec00000,
qdev_get_gpio_in(uic[1], 0));
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, 0xc08000000);
pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci.0"));
/* PCI devices */
pci_create_simple(pci_bus, PCI_DEVFN(6, 0), "sm501");
/* SoC has a single SATA port but we don't emulate that yet
* However, firmware and usual clients have driver for SiI311x
* so add one for convenience by default */
if (defaults_enabled()) {
pci_create_simple(pci_bus, -1, "sii3112");
}
/* SoC has 4 UARTs
* but board has only one wired and two are present in fdt */
if (serial_hd(0) != NULL) {
serial_mm_init(get_system_memory(), 0x4ef600300, 0,
qdev_get_gpio_in(uic[1], 1),
PPC_SERIAL_MM_BAUDBASE, serial_hd(0),
DEVICE_BIG_ENDIAN);
}
if (serial_hd(1) != NULL) {
serial_mm_init(get_system_memory(), 0x4ef600400, 0,
qdev_get_gpio_in(uic[0], 1),
PPC_SERIAL_MM_BAUDBASE, serial_hd(1),
DEVICE_BIG_ENDIAN);
}
/* Load U-Boot image. */
if (!machine->kernel_filename) {
success = sam460ex_load_uboot();
if (success < 0) {
error_report("could not load firmware");
exit(1);
}
}
/* Load kernel. */
if (machine->kernel_filename) {
hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
success = load_uimage(machine->kernel_filename, &entry, &loadaddr,
NULL, NULL, NULL);
if (success < 0) {
uint64_t elf_entry;
success = load_elf(machine->kernel_filename, NULL, NULL, NULL,
&elf_entry, NULL, NULL, NULL,
1, PPC_ELF_MACHINE, 0, 0);
entry = elf_entry;
}
/* XXX try again as binary */
if (success < 0) {
error_report("could not load kernel '%s'",
machine->kernel_filename);
exit(1);
}
}
/* Load initrd. */
if (machine->initrd_filename) {
initrd_size = load_image_targphys(machine->initrd_filename,
RAMDISK_ADDR,
machine->ram_size - RAMDISK_ADDR);
if (initrd_size < 0) {
error_report("could not load ram disk '%s' at %x",
machine->initrd_filename, RAMDISK_ADDR);
exit(1);
}
}
/* If we're loading a kernel directly, we must load the device tree too. */
if (machine->kernel_filename) {
int dt_size;
dt_size = sam460ex_load_device_tree(machine, FDT_ADDR,
RAMDISK_ADDR, initrd_size);
boot_info->dt_base = FDT_ADDR;
boot_info->dt_size = dt_size;
}
boot_info->entry = entry;
}
static void sam460ex_machine_init(MachineClass *mc)
{
mc->desc = "aCube Sam460ex";
mc->init = sam460ex_init;
mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("460exb");
mc->default_ram_size = 512 * MiB;
mc->default_ram_id = "ppc4xx.sdram";
}
DEFINE_MACHINE("sam460ex", sam460ex_machine_init)
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