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dc333cd609
xemu/hw/ppc_oldworld.c
Alexander Graf dc333cd609 PPC: tell the guest about the time base frequency 
Our guest systems need to know by how much the timebase increases every second,
so there usually is a "timebase-frequency" property in the cpu leaf of the
device tree.

This property is missing in OpenBIOS.

With qemu, Linux's fallback timebase speed and qemu's internal timebase speed
match up. With KVM, that is no longer true. The guest is running at the same
timebase speed as the host.

This leads to massive timing problems. On my test machine, a "sleep 2" takes
about 14 seconds with KVM enabled.

This patch exports the timebase frequency to OpenBIOS, so it can then put them
into the device tree.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2010-02-14 16:10:54 +02:00

432 lines
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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 "hw.h"
#include "ppc.h"
#include "ppc_mac.h"
#include "mac_dbdma.h"
#include "nvram.h"
#include "pc.h"
#include "sysemu.h"
#include "net.h"
#include "isa.h"
#include "pci.h"
#include "usb-ohci.h"
#include "boards.h"
#include "fw_cfg.h"
#include "escc.h"
#include "ide.h"
#include "loader.h"
#include "elf.h"
#include "kvm.h"
#include "kvm_ppc.h"
#define MAX_IDE_BUS 2
#define VGA_BIOS_SIZE 65536
#define CFG_ADDR 0xf0000510
/* temporary frame buffer OSI calls for the video.x driver. The right
solution is to modify the driver to use VGA PCI I/Os */
/* XXX: to be removed. This is no way related to emulation */
static int vga_osi_call (CPUState *env)
{
static int vga_vbl_enabled;
int linesize;
#if 0
printf("osi_call R5=%016" PRIx64 "\n", ppc_dump_gpr(env, 5));
#endif
/* same handler as PearPC, coming from the original MOL video
driver. */
switch(env->gpr[5]) {
case 4:
break;
case 28: /* set_vmode */
if (env->gpr[6] != 1 || env->gpr[7] != 0)
env->gpr[3] = 1;
else
env->gpr[3] = 0;
break;
case 29: /* get_vmode_info */
if (env->gpr[6] != 0) {
if (env->gpr[6] != 1 || env->gpr[7] != 0) {
env->gpr[3] = 1;
break;
}
}
env->gpr[3] = 0;
env->gpr[4] = (1 << 16) | 1; /* num_vmodes, cur_vmode */
env->gpr[5] = (1 << 16) | 0; /* num_depths, cur_depth_mode */
env->gpr[6] = (graphic_width << 16) | graphic_height; /* w, h */
env->gpr[7] = 85 << 16; /* refresh rate */
env->gpr[8] = (graphic_depth + 7) & ~7; /* depth (round to byte) */
linesize = ((graphic_depth + 7) >> 3) * graphic_width;
linesize = (linesize + 3) & ~3;
env->gpr[9] = (linesize << 16) | 0; /* row_bytes, offset */
break;
case 31: /* set_video power */
env->gpr[3] = 0;
break;
case 39: /* video_ctrl */
if (env->gpr[6] == 0 || env->gpr[6] == 1)
vga_vbl_enabled = env->gpr[6];
env->gpr[3] = 0;
break;
case 47:
break;
case 59: /* set_color */
/* R6 = index, R7 = RGB */
env->gpr[3] = 0;
break;
case 64: /* get color */
/* R6 = index */
env->gpr[3] = 0;
break;
case 116: /* set hwcursor */
/* R6 = x, R7 = y, R8 = visible, R9 = data */
break;
default:
fprintf(stderr, "unsupported OSI call R5=%016" PRIx64 "\n",
ppc_dump_gpr(env, 5));
break;
}
return 1; /* osi_call handled */
}
static int fw_cfg_boot_set(void *opaque, const char *boot_device)
{
fw_cfg_add_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
return 0;
}
static void ppc_heathrow_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)
{
CPUState *env = NULL, *envs[MAX_CPUS];
char *filename;
qemu_irq *pic, **heathrow_irqs;
int linux_boot, i;
ram_addr_t ram_offset, bios_offset, vga_bios_offset;
uint32_t kernel_base, initrd_base;
int32_t kernel_size, initrd_size;
PCIBus *pci_bus;
MacIONVRAMState *nvr;
int vga_bios_size, bios_size;
int pic_mem_index, nvram_mem_index, dbdma_mem_index, cuda_mem_index;
int escc_mem_index, ide_mem_index[2];
uint16_t ppc_boot_device;
DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
void *fw_cfg;
void *dbdma;
uint8_t *vga_bios_ptr;
linux_boot = (kernel_filename != NULL);
/* init CPUs */
if (cpu_model == NULL)
cpu_model = "G3";
for (i = 0; i < smp_cpus; i++) {
env = cpu_init(cpu_model);
if (!env) {
fprintf(stderr, "Unable to find PowerPC CPU definition\n");
exit(1);
}
/* Set time-base frequency to 16.6 Mhz */
cpu_ppc_tb_init(env, 16600000UL);
env->osi_call = vga_osi_call;
qemu_register_reset((QEMUResetHandler*)&cpu_reset, env);
envs[i] = env;
}
/* Make sure all register sets take effect */
cpu_synchronize_state(env);
/* 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);
}
ram_offset = qemu_ram_alloc(ram_size);
cpu_register_physical_memory(0, ram_size, ram_offset);
/* allocate and load BIOS */
bios_offset = qemu_ram_alloc(BIOS_SIZE);
if (bios_name == NULL)
bios_name = PROM_FILENAME;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
cpu_register_physical_memory(PROM_ADDR, BIOS_SIZE, bios_offset | IO_MEM_ROM);
/* Load OpenBIOS (ELF) */
if (filename) {
bios_size = load_elf(filename, 0, NULL, NULL, NULL,
1, ELF_MACHINE, 0);
qemu_free(filename);
} else {
bios_size = -1;
}
if (bios_size < 0 || bios_size > BIOS_SIZE) {
hw_error("qemu: could not load PowerPC bios '%s'\n", bios_name);
exit(1);
}
/* allocate and load VGA BIOS */
vga_bios_offset = qemu_ram_alloc(VGA_BIOS_SIZE);
vga_bios_ptr = qemu_get_ram_ptr(vga_bios_offset);
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, VGABIOS_FILENAME);
if (filename) {
vga_bios_size = load_image(filename, vga_bios_ptr + 8);
qemu_free(filename);
} else {
vga_bios_size = -1;
}
if (vga_bios_size < 0) {
/* if no bios is present, we can still work */
fprintf(stderr, "qemu: warning: could not load VGA bios '%s'\n",
VGABIOS_FILENAME);
vga_bios_size = 0;
} else {
/* set a specific header (XXX: find real Apple format for NDRV
drivers) */
vga_bios_ptr[0] = 'N';
vga_bios_ptr[1] = 'D';
vga_bios_ptr[2] = 'R';
vga_bios_ptr[3] = 'V';
cpu_to_be32w((uint32_t *)(vga_bios_ptr + 4), vga_bios_size);
vga_bios_size += 8;
/* Round to page boundary */
vga_bios_size = (vga_bios_size + TARGET_PAGE_SIZE - 1) &
TARGET_PAGE_MASK;
}
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;
/* Now we can load the kernel. The first step tries to load the kernel
supposing PhysAddr = 0x00000000. If that was wrong the kernel is
loaded again, the new PhysAddr being computed from lowaddr. */
kernel_size = load_elf(kernel_filename, kernel_base, NULL, &lowaddr, NULL,
1, ELF_MACHINE, 0);
if (kernel_size > 0 && lowaddr != KERNEL_LOAD_ADDR) {
kernel_size = load_elf(kernel_filename, (2 * kernel_base) - lowaddr,
NULL, NULL, NULL, 1, ELF_MACHINE, 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) {
hw_error("qemu: could not load kernel '%s'\n",
kernel_filename);
exit(1);
}
/* load initrd */
if (initrd_filename) {
initrd_base = INITRD_LOAD_ADDR;
initrd_size = load_image_targphys(initrd_filename, initrd_base,
ram_size - initrd_base);
if (initrd_size < 0) {
hw_error("qemu: could not load initial ram disk '%s'\n",
initrd_filename);
exit(1);
}
} else {
initrd_base = 0;
initrd_size = 0;
}
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);
}
}
isa_mem_base = 0x80000000;
/* Register 2 MB of ISA IO space */
isa_mmio_init(0xfe000000, 0x00200000);
/* XXX: we register only 1 output pin for heathrow PIC */
heathrow_irqs = qemu_mallocz(smp_cpus * sizeof(qemu_irq *));
heathrow_irqs[0] =
qemu_mallocz(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:
hw_error("Bus model not supported on OldWorld Mac machine\n");
}
}
/* init basic PC hardware */
if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
hw_error("Only 6xx bus is supported on heathrow machine\n");
}
pic = heathrow_pic_init(&pic_mem_index, 1, heathrow_irqs);
pci_bus = pci_grackle_init(0xfec00000, pic);
pci_vga_init(pci_bus, vga_bios_offset, vga_bios_size);
escc_mem_index = escc_init(0x80013000, pic[0x0f], pic[0x10], serial_hds[0],
serial_hds[1], ESCC_CLOCK, 4);
for(i = 0; i < nb_nics; i++)
pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
fprintf(stderr, "qemu: too many IDE bus\n");
exit(1);
}
/* First IDE channel is a MAC IDE on the MacIO bus */
hd[0] = drive_get(IF_IDE, 0, 0);
hd[1] = drive_get(IF_IDE, 0, 1);
dbdma = DBDMA_init(&dbdma_mem_index);
ide_mem_index[0] = -1;
ide_mem_index[1] = pmac_ide_init(hd, pic[0x0D], dbdma, 0x16, pic[0x02]);
/* Second IDE channel is a CMD646 on the PCI bus */
hd[0] = drive_get(IF_IDE, 1, 0);
hd[1] = drive_get(IF_IDE, 1, 1);
hd[3] = hd[2] = NULL;
pci_cmd646_ide_init(pci_bus, hd, 0);
/* cuda also initialize ADB */
cuda_init(&cuda_mem_index, pic[0x12]);
adb_kbd_init(&adb_bus);
adb_mouse_init(&adb_bus);
nvr = macio_nvram_init(&nvram_mem_index, 0x2000, 4);
pmac_format_nvram_partition(nvr, 0x2000);
macio_init(pci_bus, PCI_DEVICE_ID_APPLE_343S1201, 1, pic_mem_index,
dbdma_mem_index, cuda_mem_index, nvr, 2, ide_mem_index,
escc_mem_index);
if (usb_enabled) {
usb_ohci_init_pci(pci_bus, -1);
}
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(0, 0, CFG_ADDR, CFG_ADDR + 2);
fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
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_ADDR);
pstrcpy_targphys("cmdline", CMDLINE_ADDR, 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);
if (kvm_enabled()) {
#ifdef CONFIG_KVM
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_TBFREQ, kvmppc_get_tbfreq());
#endif
} else {
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_TBFREQ, get_ticks_per_sec());
}
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
}
static QEMUMachine heathrow_machine = {
.name = "g3beige",
.desc = "Heathrow based PowerMAC",
.init = ppc_heathrow_init,
.max_cpus = MAX_CPUS,
#ifndef TARGET_PPC64
.is_default = 1,
#endif
};
static void heathrow_machine_init(void)
{
qemu_register_machine(&heathrow_machine);
}
machine_init(heathrow_machine_init);
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