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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 "config.h"
#include "qemu-common.h"
#include "net.h"
#include "hw.h"
#include "pci.h"
#include "boards.h"
#include "ppc440.h"
#include "kvm.h"
#include "kvm_ppc.h"
#include "device_tree.h"
#include "loader.h"
#include "elf.h"
#define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
/* from u-boot */
#define KERNEL_ADDR 0x1000000
#define FDT_ADDR 0x1800000
#define RAMDISK_ADDR 0x1900000
#ifdef CONFIG_FDT
static int bamboo_copy_host_cell(void *fdt, const char *node, const char *prop)
{
uint32_t cell;
int ret;
ret = kvmppc_read_host_property(node, prop, &cell, sizeof(cell));
if (ret < 0) {
fprintf(stderr, "couldn't read host %s/%s\n", node, prop);
goto out;
}
ret = qemu_devtree_setprop_cell(fdt, node, prop, cell);
if (ret < 0) {
fprintf(stderr, "couldn't set guest %s/%s\n", node, prop);
goto out;
}
out:
return ret;
}
static void bamboo_fdt_update(void *fdt)
{
/* 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. */
bamboo_copy_host_cell(fdt, "/cpus/cpu@0", "clock-frequency");
bamboo_copy_host_cell(fdt, "/cpus/cpu@0", "timebase-frequency");
}
#endif
static int bamboo_load_device_tree(target_phys_addr_t addr,
uint32_t ramsize,
target_phys_addr_t initrd_base,
target_phys_addr_t initrd_size,
const char *kernel_cmdline)
{
int ret = -1;
#ifdef CONFIG_FDT
uint32_t mem_reg_property[] = { 0, 0, ramsize };
char *filename;
int fdt_size;
void *fdt;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (!filename) {
goto out;
}
fdt = load_device_tree(filename, &fdt_size);
g_free(filename);
if (fdt == NULL) {
goto out;
}
/* Manipulate device tree in memory. */
ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
sizeof(mem_reg_property));
if (ret < 0)
fprintf(stderr, "couldn't set /memory/reg\n");
ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
initrd_base);
if (ret < 0)
fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
ret = qemu_devtree_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_devtree_setprop_string(fdt, "/chosen", "bootargs",
kernel_cmdline);
if (ret < 0)
fprintf(stderr, "couldn't set /chosen/bootargs\n");
if (kvm_enabled()) {
bamboo_fdt_update(fdt);
}
ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
g_free(fdt);
out:
#endif
return ret;
}
static void bamboo_init(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model)
{
unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
PCIBus *pcibus;
CPUState *env;
uint64_t elf_entry;
uint64_t elf_lowaddr;
target_phys_addr_t entry = 0;
target_phys_addr_t loadaddr = 0;
target_long initrd_size = 0;
int success;
int i;
/* Setup CPU. */
env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1, cpu_model);
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], "e1000", NULL);
}
}
/* Load kernel. */
if (kernel_filename) {
success = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
if (success < 0) {
success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
&elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
entry = elf_entry;
loadaddr = elf_lowaddr;
}
/* XXX try again as binary */
if (success < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
kernel_filename);
exit(1);
}
}
/* Load initrd. */
if (initrd_filename) {
initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
ram_size - RAMDISK_ADDR);
if (initrd_size < 0) {
fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
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(FDT_ADDR, ram_size, RAMDISK_ADDR,
initrd_size, kernel_cmdline) < 0) {
fprintf(stderr, "couldn't load device tree\n");
exit(1);
}
/* Set initial guest state. */
env->gpr[1] = (16<<20) - 8;
env->gpr[3] = FDT_ADDR;
env->nip = entry;
/* XXX we currently depend on KVM to create some initial TLB entries. */
}
if (kvm_enabled())
kvmppc_init();
}
static QEMUMachine bamboo_machine = {
.name = "bamboo-0.13",
.alias = "bamboo",
.desc = "bamboo",
.init = bamboo_init,
};
static QEMUMachine bamboo_machine_v0_12 = {
.name = "bamboo-0.12",
.desc = "bamboo",
.init = bamboo_init,
.compat_props = (GlobalProperty[]) {
{
.driver = "virtio-serial-pci",
.property = "max_ports",
.value = stringify(1),
},{
.driver = "virtio-serial-pci",
.property = "vectors",
.value = stringify(0),
},
{ /* end of list */ }
},
};
static void bamboo_machine_init(void)
{
qemu_register_machine(&bamboo_machine);
qemu_register_machine(&bamboo_machine_v0_12);
}
machine_init(bamboo_machine_init);
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