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qemu-e2k/hw/ppc/ppc440_bamboo.c
Daniel Henrique Barboza 8d42c851ed hw/ppc: set machine->fdt in bamboo_load_device_tree() 
This will enable support for 'dumpdtb' QMP/HMP command for the bamboo
machine.

Setting machine->fdt requires a MachineState pointer to be used inside
bamboo_load_device_tree(). Let's change the function to receive this
pointer from the caller. 'ramsize' and 'kernel_cmdline' can be retrieved
directly from the 'machine' pointer.

Cc: Cédric Le Goater <clg@kaod.org>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220926173855.1159396-9-danielhb413@gmail.com>
2022-10-17 16:15:10 -03:00

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/*
* QEMU PowerPC 440 Bamboo board emulation
*
* Copyright 2007 IBM Corporation.
* Authors:
* Jerone Young <jyoung5@us.ibm.com>
* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
* Hollis Blanchard <hollisb@us.ibm.com>
*
* This work is licensed under the GNU GPL license version 2 or later.
*
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/error-report.h"
#include "qemu/datadir.h"
#include "qemu/error-report.h"
#include "net/net.h"
#include "hw/pci/pci.h"
#include "hw/boards.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "sysemu/device_tree.h"
#include "hw/loader.h"
#include "elf.h"
#include "hw/char/serial.h"
#include "hw/ppc/ppc.h"
#include "ppc405.h"
#include "sysemu/sysemu.h"
#include "sysemu/reset.h"
#include "hw/sysbus.h"
#include "hw/intc/ppc-uic.h"
#include "hw/qdev-properties.h"
#include "qapi/error.h"
#include <libfdt.h>
#define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
/* from u-boot */
#define KERNEL_ADDR 0x1000000
#define FDT_ADDR 0x1800000
#define RAMDISK_ADDR 0x1900000
#define PPC440EP_PCI_CONFIG 0xeec00000
#define PPC440EP_PCI_INTACK 0xeed00000
#define PPC440EP_PCI_SPECIAL 0xeed00000
#define PPC440EP_PCI_REGS 0xef400000
#define PPC440EP_PCI_IO 0xe8000000
#define PPC440EP_PCI_IOLEN 0x00010000
static hwaddr entry;
static int bamboo_load_device_tree(MachineState *machine,
hwaddr addr,
hwaddr initrd_base,
hwaddr initrd_size)
{
int ret = -1;
uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(machine->ram_size) };
char *filename;
int fdt_size;
void *fdt;
uint32_t tb_freq = 400000000;
uint32_t clock_freq = 400000000;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (!filename) {
return -1;
}
fdt = load_device_tree(filename, &fdt_size);
g_free(filename);
if (fdt == NULL) {
return -1;
}
/* Manipulate device tree in memory. */
ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
sizeof(mem_reg_property));
if (ret < 0) {
fprintf(stderr, "couldn't set /memory/reg\n");
}
ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
initrd_base);
if (ret < 0) {
fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
}
ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
(initrd_base + initrd_size));
if (ret < 0) {
fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
}
ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
machine->kernel_cmdline);
if (ret < 0) {
fprintf(stderr, "couldn't set /chosen/bootargs\n");
}
/*
* 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);
rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
/* Set ms->fdt for 'dumpdtb' QMP/HMP command */
machine->fdt = fdt;
return 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 = 1U << 31; /* up to 0x80000000 */
tlb->EPN = va & TARGET_PAGE_MASK;
tlb->RPN = pa & TARGET_PAGE_MASK;
tlb->PID = 0;
tlb = &env->tlb.tlbe[1];
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 1U << 31; /* up to 0xffffffff */
tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
tlb->PID = 0;
}
static void main_cpu_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
cpu_reset(CPU(cpu));
env->gpr[1] = (16 * MiB) - 8;
env->gpr[3] = FDT_ADDR;
env->nip = entry;
/* Create a mapping for the kernel. */
mmubooke_create_initial_mapping(env, 0, 0);
}
static void bamboo_init(MachineState *machine)
{
const char *kernel_filename = machine->kernel_filename;
const char *initrd_filename = machine->initrd_filename;
unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *isa = g_new(MemoryRegion, 1);
PCIBus *pcibus;
PowerPCCPU *cpu;
CPUPPCState *env;
target_long initrd_size = 0;
DeviceState *dev;
DeviceState *uicdev;
SysBusDevice *uicsbd;
int success;
int i;
cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
env = &cpu->env;
if (env->mmu_model != POWERPC_MMU_BOOKE) {
error_report("MMU model %i not supported by this machine",
env->mmu_model);
exit(1);
}
qemu_register_reset(main_cpu_reset, cpu);
ppc_booke_timers_init(cpu, 400000000, 0);
ppc_dcr_init(env, NULL, NULL);
/* interrupt controller */
uicdev = qdev_new(TYPE_PPC_UIC);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(uicdev), cpu, &error_fatal);
object_unref(OBJECT(uicdev));
uicsbd = SYS_BUS_DEVICE(uicdev);
sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_INT,
qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_INT));
sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_CINT,
qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_CINT));
/* SDRAM controller */
dev = qdev_new(TYPE_PPC4xx_SDRAM_DDR);
object_property_set_link(OBJECT(dev), "dram", OBJECT(machine->ram),
&error_abort);
ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
object_unref(OBJECT(dev));
/* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(uicdev, 14));
/* Enable SDRAM memory regions, this should be done by the firmware */
ppc4xx_sdram_ddr_enable(PPC4xx_SDRAM_DDR(dev));
/* PCI */
dev = sysbus_create_varargs(TYPE_PPC4xx_PCI_HOST_BRIDGE,
PPC440EP_PCI_CONFIG,
qdev_get_gpio_in(uicdev, pci_irq_nrs[0]),
qdev_get_gpio_in(uicdev, pci_irq_nrs[1]),
qdev_get_gpio_in(uicdev, pci_irq_nrs[2]),
qdev_get_gpio_in(uicdev, pci_irq_nrs[3]),
NULL);
pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
if (!pcibus) {
error_report("couldn't create PCI controller");
exit(1);
}
memory_region_init_alias(isa, NULL, "isa_mmio",
get_system_io(), 0, PPC440EP_PCI_IOLEN);
memory_region_add_subregion(get_system_memory(), PPC440EP_PCI_IO, isa);
if (serial_hd(0) != NULL) {
serial_mm_init(address_space_mem, 0xef600300, 0,
qdev_get_gpio_in(uicdev, 0),
PPC_SERIAL_MM_BAUDBASE, serial_hd(0),
DEVICE_BIG_ENDIAN);
}
if (serial_hd(1) != NULL) {
serial_mm_init(address_space_mem, 0xef600400, 0,
qdev_get_gpio_in(uicdev, 1),
PPC_SERIAL_MM_BAUDBASE, serial_hd(1),
DEVICE_BIG_ENDIAN);
}
if (pcibus) {
/* Register network interfaces. */
for (i = 0; i < nb_nics; i++) {
/*
* There are no PCI NICs on the Bamboo board, but there are
* PCI slots, so we can pick whatever default model we want.
*/
pci_nic_init_nofail(&nd_table[i], pcibus, "e1000", NULL);
}
}
/* Load kernel. */
if (kernel_filename) {
hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
success = load_uimage(kernel_filename, &entry, &loadaddr, NULL,
NULL, NULL);
if (success < 0) {
uint64_t elf_entry;
success = load_elf(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'", kernel_filename);
exit(1);
}
}
/* Load initrd. */
if (initrd_filename) {
initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
machine->ram_size - RAMDISK_ADDR);
if (initrd_size < 0) {
error_report("could not load ram disk '%s' at %x",
initrd_filename, RAMDISK_ADDR);
exit(1);
}
}
/* If we're loading a kernel directly, we must load the device tree too. */
if (kernel_filename) {
if (bamboo_load_device_tree(machine, FDT_ADDR,
RAMDISK_ADDR, initrd_size) < 0) {
error_report("couldn't load device tree");
exit(1);
}
}
}
static void bamboo_machine_init(MachineClass *mc)
{
mc->desc = "bamboo";
mc->init = bamboo_init;
mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("440epb");
mc->default_ram_id = "ppc4xx.sdram";
}
DEFINE_MACHINE("bamboo", bamboo_machine_init)
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