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qemu-patch-raspberry4/hw/ppc/mac_oldworld.c
Peter Crosthwaite 7ef295ea5b loader: Add data swap option to load-elf 
Some CPUs are of an opposite data-endianness to other components in the
system. Sometimes elfs have the data sections layed out with this CPU
data-endianness accounting for when loaded via the CPU, so byte swaps
(relative to other system components) will occur.

The leading example, is ARM's BE32 mode, which is is basically LE with
address manipulation on half-word and byte accesses to access the
hw/byte reversed address. This means that word data is invariant
across LE and BE32. This also means that instructions are still LE.
The expectation is that the elf will be loaded via the CPU in this
endianness scheme, which means the data in the elf is reversed at
compile time.

As QEMU loads via the system memory directly, rather than the CPU, we
need a mechanism to reverse elf data endianness to implement this
possibility.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04 11:30:21 +00:00

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/*
* QEMU OldWorld PowerMac (currently ~G3 Beige) hardware System Emulator
*
* Copyright (c) 2004-2007 Fabrice Bellard
* Copyright (c) 2007 Jocelyn Mayer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/ppc/ppc.h"
#include "mac.h"
#include "hw/input/adb.h"
#include "hw/timer/m48t59.h"
#include "sysemu/sysemu.h"
#include "net/net.h"
#include "hw/isa/isa.h"
#include "hw/pci/pci.h"
#include "hw/boards.h"
#include "hw/nvram/fw_cfg.h"
#include "hw/char/escc.h"
#include "hw/ide.h"
#include "hw/loader.h"
#include "elf.h"
#include "qemu/error-report.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "sysemu/block-backend.h"
#include "exec/address-spaces.h"
#define MAX_IDE_BUS 2
#define CFG_ADDR 0xf0000510
#define TBFREQ 16600000UL
#define CLOCKFREQ 266000000UL
#define BUSFREQ 66000000UL
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
{
return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
}
static hwaddr round_page(hwaddr addr)
{
return (addr + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
}
static void ppc_heathrow_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
cpu_reset(CPU(cpu));
}
static void ppc_heathrow_init(MachineState *machine)
{
ram_addr_t ram_size = machine->ram_size;
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
const char *boot_device = machine->boot_order;
MemoryRegion *sysmem = get_system_memory();
PowerPCCPU *cpu = NULL;
CPUPPCState *env = NULL;
char *filename;
qemu_irq *pic, **heathrow_irqs;
int linux_boot, i;
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *bios = g_new(MemoryRegion, 1);
MemoryRegion *isa = g_new(MemoryRegion, 1);
uint32_t kernel_base, initrd_base, cmdline_base = 0;
int32_t kernel_size, initrd_size;
PCIBus *pci_bus;
PCIDevice *macio;
MACIOIDEState *macio_ide;
DeviceState *dev;
BusState *adb_bus;
int bios_size;
MemoryRegion *pic_mem;
MemoryRegion *escc_mem, *escc_bar = g_new(MemoryRegion, 1);
uint16_t ppc_boot_device;
DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
void *fw_cfg;
uint64_t tbfreq;
linux_boot = (kernel_filename != NULL);
/* init CPUs */
if (machine->cpu_model == NULL)
machine->cpu_model = "G3";
for (i = 0; i < smp_cpus; i++) {
cpu = cpu_ppc_init(machine->cpu_model);
if (cpu == NULL) {
fprintf(stderr, "Unable to find PowerPC CPU definition\n");
exit(1);
}
env = &cpu->env;
/* Set time-base frequency to 16.6 Mhz */
cpu_ppc_tb_init(env, TBFREQ);
qemu_register_reset(ppc_heathrow_reset, cpu);
}
/* allocate RAM */
if (ram_size > (2047 << 20)) {
fprintf(stderr,
"qemu: Too much memory for this machine: %d MB, maximum 2047 MB\n",
((unsigned int)ram_size / (1 << 20)));
exit(1);
}
memory_region_allocate_system_memory(ram, NULL, "ppc_heathrow.ram",
ram_size);
memory_region_add_subregion(sysmem, 0, ram);
/* allocate and load BIOS */
memory_region_init_ram(bios, NULL, "ppc_heathrow.bios", BIOS_SIZE,
&error_fatal);
vmstate_register_ram_global(bios);
if (bios_name == NULL)
bios_name = PROM_FILENAME;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
memory_region_set_readonly(bios, true);
memory_region_add_subregion(sysmem, PROM_ADDR, bios);
/* Load OpenBIOS (ELF) */
if (filename) {
bios_size = load_elf(filename, 0, NULL, NULL, NULL, NULL,
1, PPC_ELF_MACHINE, 0, 0);
g_free(filename);
} else {
bios_size = -1;
}
if (bios_size < 0 || bios_size > BIOS_SIZE) {
error_report("could not load PowerPC bios '%s'", bios_name);
exit(1);
}
if (linux_boot) {
uint64_t lowaddr = 0;
int bswap_needed;
#ifdef BSWAP_NEEDED
bswap_needed = 1;
#else
bswap_needed = 0;
#endif
kernel_base = KERNEL_LOAD_ADDR;
kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
NULL, &lowaddr, NULL, 1, PPC_ELF_MACHINE,
0, 0);
if (kernel_size < 0)
kernel_size = load_aout(kernel_filename, kernel_base,
ram_size - kernel_base, bswap_needed,
TARGET_PAGE_SIZE);
if (kernel_size < 0)
kernel_size = load_image_targphys(kernel_filename,
kernel_base,
ram_size - kernel_base);
if (kernel_size < 0) {
error_report("could not load kernel '%s'", kernel_filename);
exit(1);
}
/* load initrd */
if (initrd_filename) {
initrd_base = round_page(kernel_base + kernel_size + KERNEL_GAP);
initrd_size = load_image_targphys(initrd_filename, initrd_base,
ram_size - initrd_base);
if (initrd_size < 0) {
error_report("could not load initial ram disk '%s'",
initrd_filename);
exit(1);
}
cmdline_base = round_page(initrd_base + initrd_size);
} else {
initrd_base = 0;
initrd_size = 0;
cmdline_base = round_page(kernel_base + kernel_size + KERNEL_GAP);
}
ppc_boot_device = 'm';
} else {
kernel_base = 0;
kernel_size = 0;
initrd_base = 0;
initrd_size = 0;
ppc_boot_device = '\0';
for (i = 0; boot_device[i] != '\0'; i++) {
/* TOFIX: for now, the second IDE channel is not properly
* used by OHW. The Mac floppy disk are not emulated.
* For now, OHW cannot boot from the network.
*/
#if 0
if (boot_device[i] >= 'a' && boot_device[i] <= 'f') {
ppc_boot_device = boot_device[i];
break;
}
#else
if (boot_device[i] >= 'c' && boot_device[i] <= 'd') {
ppc_boot_device = boot_device[i];
break;
}
#endif
}
if (ppc_boot_device == '\0') {
fprintf(stderr, "No valid boot device for G3 Beige machine\n");
exit(1);
}
}
/* Register 2 MB of ISA IO space */
memory_region_init_alias(isa, NULL, "isa_mmio",
get_system_io(), 0, 0x00200000);
memory_region_add_subregion(sysmem, 0xfe000000, isa);
/* XXX: we register only 1 output pin for heathrow PIC */
heathrow_irqs = g_malloc0(smp_cpus * sizeof(qemu_irq *));
heathrow_irqs[0] =
g_malloc0(smp_cpus * sizeof(qemu_irq) * 1);
/* Connect the heathrow PIC outputs to the 6xx bus */
for (i = 0; i < smp_cpus; i++) {
switch (PPC_INPUT(env)) {
case PPC_FLAGS_INPUT_6xx:
heathrow_irqs[i] = heathrow_irqs[0] + (i * 1);
heathrow_irqs[i][0] =
((qemu_irq *)env->irq_inputs)[PPC6xx_INPUT_INT];
break;
default:
error_report("Bus model not supported on OldWorld Mac machine");
exit(1);
}
}
/* Timebase Frequency */
if (kvm_enabled()) {
tbfreq = kvmppc_get_tbfreq();
} else {
tbfreq = TBFREQ;
}
/* init basic PC hardware */
if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
error_report("Only 6xx bus is supported on heathrow machine");
exit(1);
}
pic = heathrow_pic_init(&pic_mem, 1, heathrow_irqs);
pci_bus = pci_grackle_init(0xfec00000, pic,
get_system_memory(),
get_system_io());
pci_vga_init(pci_bus);
escc_mem = escc_init(0, pic[0x0f], pic[0x10], serial_hds[0],
serial_hds[1], ESCC_CLOCK, 4);
memory_region_init_alias(escc_bar, NULL, "escc-bar",
escc_mem, 0, memory_region_size(escc_mem));
for(i = 0; i < nb_nics; i++)
pci_nic_init_nofail(&nd_table[i], pci_bus, "ne2k_pci", NULL);
ide_drive_get(hd, ARRAY_SIZE(hd));
macio = pci_create(pci_bus, -1, TYPE_OLDWORLD_MACIO);
dev = DEVICE(macio);
qdev_connect_gpio_out(dev, 0, pic[0x12]); /* CUDA */
qdev_connect_gpio_out(dev, 1, pic[0x0D]); /* IDE-0 */
qdev_connect_gpio_out(dev, 2, pic[0x02]); /* IDE-0 DMA */
qdev_connect_gpio_out(dev, 3, pic[0x0E]); /* IDE-1 */
qdev_connect_gpio_out(dev, 4, pic[0x03]); /* IDE-1 DMA */
qdev_prop_set_uint64(dev, "frequency", tbfreq);
macio_init(macio, pic_mem, escc_bar);
macio_ide = MACIO_IDE(object_resolve_path_component(OBJECT(macio),
"ide[0]"));
macio_ide_init_drives(macio_ide, hd);
macio_ide = MACIO_IDE(object_resolve_path_component(OBJECT(macio),
"ide[1]"));
macio_ide_init_drives(macio_ide, &hd[MAX_IDE_DEVS]);
dev = DEVICE(object_resolve_path_component(OBJECT(macio), "cuda"));
adb_bus = qdev_get_child_bus(dev, "adb.0");
dev = qdev_create(adb_bus, TYPE_ADB_KEYBOARD);
qdev_init_nofail(dev);
dev = qdev_create(adb_bus, TYPE_ADB_MOUSE);
qdev_init_nofail(dev);
if (usb_enabled()) {
pci_create_simple(pci_bus, -1, "pci-ohci");
}
if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8)
graphic_depth = 15;
/* No PCI init: the BIOS will do it */
fw_cfg = fw_cfg_init_mem(CFG_ADDR, CFG_ADDR + 2);
fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, ARCH_HEATHROW);
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, kernel_base);
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
if (kernel_cmdline) {
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_CMDLINE, cmdline_base);
pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE, kernel_cmdline);
} else {
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_CMDLINE, 0);
}
fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_base);
fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ppc_boot_device);
fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_WIDTH, graphic_width);
fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_HEIGHT, graphic_height);
fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_DEPTH, graphic_depth);
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_IS_KVM, kvm_enabled());
if (kvm_enabled()) {
#ifdef CONFIG_KVM
uint8_t *hypercall;
hypercall = g_malloc(16);
kvmppc_get_hypercall(env, hypercall, 16);
fw_cfg_add_bytes(fw_cfg, FW_CFG_PPC_KVM_HC, hypercall, 16);
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_KVM_PID, getpid());
#endif
}
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_TBFREQ, tbfreq);
/* Mac OS X requires a "known good" clock-frequency value; pass it one. */
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_CLOCKFREQ, CLOCKFREQ);
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_BUSFREQ, BUSFREQ);
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
}
static int heathrow_kvm_type(const char *arg)
{
/* Always force PR KVM */
return 2;
}
static void heathrow_machine_init(MachineClass *mc)
{
mc->desc = "Heathrow based PowerMAC";
mc->init = ppc_heathrow_init;
mc->max_cpus = MAX_CPUS;
#ifndef TARGET_PPC64
mc->is_default = 1;
#endif
/* TOFIX "cad" when Mac floppy is implemented */
mc->default_boot_order = "cd";
mc->kvm_type = heathrow_kvm_type;
}
DEFINE_MACHINE("g3beige", heathrow_machine_init)
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