static IOAPICState *ioapic;
static PCIDevice *i440fx_state;
+static void xen_relocator_hook(target_phys_addr_t prot_addr, uint16_t protocol,
+ uint8_t header[], int kernel_size);
+#define smbus_eeprom_device_init (void)
+
static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
{
}
i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
}
-
+#ifndef CONFIG_DM
/* IRQ handling */
int cpu_get_pic_interrupt(CPUState *env)
{
if (level && apic_accept_pic_intr(env))
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
+#endif /* !CONFIG_DM */
/* PC cmos mappings */
const char *initrd_filename,
const char *kernel_cmdline)
{
+#ifndef __ia64__
uint16_t protocol;
uint32_t gpr[8];
uint16_t seg[6];
prot_addr = 0x100000;
}
-#if 0
+#if 1
fprintf(stderr,
"qemu: real_addr = %#zx\n"
"qemu: cmdline_addr = %#zx\n"
setup_size = (setup_size+1)*512;
kernel_size -= setup_size; /* Size of protected-mode code */
+ xen_relocator_hook(prot_addr, protocol, header, kernel_size);
+
if (!fread_targphys_ok(real_addr+1024, setup_size-1024, f) ||
!fread_targphys_ok(prot_addr, kernel_size, f)) {
fprintf(stderr, "qemu: read error on kernel '%s'\n",
gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
generate_bootsect(gpr, seg, 0);
+#endif
}
static void main_cpu_reset(void *opaque)
fprintf(stderr, "Unable to find x86 CPU definition\n");
exit(1);
}
+#ifndef CONFIG_DM
if (i != 0)
env->hflags |= HF_HALTED_MASK;
if (smp_cpus > 1) {
/* XXX: enable it in all cases */
env->cpuid_features |= CPUID_APIC;
}
+#endif /* !CONFIG_DM */
register_savevm("cpu", i, 4, cpu_save, cpu_load, env);
qemu_register_reset(main_cpu_reset, env);
if (pci_enabled) {
vmport_init(env);
}
+#ifndef CONFIG_DM
/* allocate RAM */
ram_addr = qemu_ram_alloc(ram_size);
cpu_register_physical_memory(0, ram_size, ram_addr);
/* map all the bios at the top of memory */
cpu_register_physical_memory((uint32_t)(-bios_size),
bios_size, bios_offset | IO_MEM_ROM);
+#endif /* !CONFIG_DM */
bochs_bios_init();
register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
+#ifndef CONFIG_DM
if (pci_enabled) {
ioapic = ioapic_init();
}
if (pci_enabled) {
pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
}
+#endif /* !CONFIG_DM */
+ if (pci_enabled)
+ pci_xen_platform_init(pci_bus);
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
if (serial_hds[i]) {
}
}
+#ifdef HAS_TPM
+ if (has_tpm_device())
+ tpm_tis_init(&i8259[11]);
+#endif
+
i8042_init(i8259[1], i8259[12], 0x60);
DMA_init(0);
#ifdef HAS_AUDIO
"ISA-only PC",
pc_init_isa,
};
+
+
+
+
+/*
+ * Evil helper for non-relocatable kernels
+ *
+ * So it works out like this:
+ *
+ * 0x100000 - Xen HVM firmware lives here. Kernel wants to boot here
+ *
+ * You can't both live there and HVM firmware is needed first, thus
+ * our plan is
+ *
+ * 0x200000 - kernel is loaded here by QEMU
+ * 0x200000+kernel_size - helper code is put here by QEMU
+ *
+ * code32_switch in kernel header is set to point at out helper
+ * code at 0x200000+kernel_size
+ *
+ * Our helper basically does memmove(0x100000,0x200000,kernel_size)
+ * and then jmps to 0x1000000.
+ *
+ * So we've overwritten the HVM firmware (which was no longer
+ * needed) and the non-relocatable kernel can happily boot
+ * at its usual address.
+ *
+ * Simple, eh ?
+ *
+ * Well the assembler needed to do this is fairly short:
+ *
+ * # Load segments
+ * cld
+ * cli
+ * movl $0x18,%eax
+ * mov %ax,%ds
+ * mov %ax,%es
+ * mov %ax,%fs
+ * mov %ax,%gs
+ * mov %ax,%ss
+ *
+ * # Move the kernel into position
+ * xor %edx,%edx
+ *_doloop:
+ * movzbl 0x600000(%edx),%eax
+ * mov %al,0x100000(%edx)
+ * add $0x1,%edx
+ * cmp $0x500000,%edx
+ * jne _doloop
+ *
+ * # start kernel
+ * xorl %ebx,%ebx
+ * mov $0x100000,%ecx
+ * jmp *%ecx
+ *
+ */
+static void setup_relocator(target_phys_addr_t addr, target_phys_addr_t src, target_phys_addr_t dst, size_t len)
+{
+ /* Now this assembler corresponds to follow machine code, with our args from QEMU spliced in :-) */
+ unsigned char buf[] = {
+ /* Load segments */
+ 0xfc, /* cld */
+ 0xfa, /* cli */
+ 0xb8, 0x18, 0x00, 0x00, 0x00, /* mov $0x18,%eax */
+ 0x8e, 0xd8, /* mov %eax,%ds */
+ 0x8e, 0xc0, /* mov %eax,%es */
+ 0x8e, 0xe0, /* mov %eax,%fs */
+ 0x8e, 0xe8, /* mov %eax,%gs */
+ 0x8e, 0xd0, /* mov %eax,%ss */
+ 0x31, 0xd2, /* xor %edx,%edx */
+
+ /* Move the kernel into position */
+ 0x0f, 0xb6, 0x82, (src&0xff), ((src>>8)&0xff), ((src>>16)&0xff), ((src>>24)&0xff), /* movzbl $src(%edx),%eax */
+ 0x88, 0x82, (dst&0xff), ((dst>>8)&0xff), ((dst>>16)&0xff), ((dst>>24)&0xff), /* mov %al,$dst(%edx) */
+ 0x83, 0xc2, 0x01, /* add $0x1,%edx */
+ 0x81, 0xfa, (len&0xff), ((len>>8)&0xff), ((len>>16)&0xff), ((len>>24)&0xff), /* cmp $len,%edx */
+ 0x75, 0xe8, /* jne 13 <_doloop> */
+
+ /* Start kernel */
+ 0x31, 0xdb, /* xor %ebx,%ebx */
+ 0xb9, (dst&0xff), ((dst>>8)&0xff), ((dst>>16)&0xff), ((dst>>24)&0xff), /* mov $dst,%ecx */
+ 0xff, 0xe1, /* jmp *%ecx */
+ };
+ cpu_physical_memory_rw(addr, buf, sizeof(buf), 1);
+ fprintf(stderr, "qemu: helper at 0x%x of size %d bytes, to move kernel of %d bytes from 0x%x to 0x%x\n",
+ (int)addr, (int)sizeof(buf), (int)len, (int)src, (int)dst);
+}
+
+
+static void xen_relocator_hook(target_phys_addr_t prot_addr, uint16_t protocol,
+ uint8_t header[], int kernel_size)
+{
+
+ /* Urgh, Xen's HVM firmware lives at 0x100000, but that's also the
+ * address Linux wants to start life at prior to relocatable support
+ */
+ fprintf(stderr, "checking need for relocation, header protocol: %x\n",
+ protocol);
+
+ if (prot_addr != 0x10000) { /* old low kernels are OK */
+ target_phys_addr_t reloc_prot_addr = 0x20000;
+
+ if (protocol >= 0x205 && (header[0x234] & 1)) {
+ /* Relocatable automatically */
+ stl_p(header+0x214, reloc_prot_addr);
+ fprintf(stderr, "qemu: kernel is relocatable\n");
+ } else {
+ /* Setup a helper which moves kernel back to
+ * its expected addr after firmware has got out
+ * of the way. We put a helper at reloc_prot_addr+kernel_size.
+ * It moves kernel from reloc_prot_addr to prot_addr and
+ * then jumps to prot_addr. Yes this is sick.
+ */
+ fprintf(stderr, "qemu: kernel is NOT relocatable\n");
+ stl_p(header+0x214, reloc_prot_addr + kernel_size);
+ setup_relocator(reloc_prot_addr + kernel_size, reloc_prot_addr, prot_addr, kernel_size);
+ }
+ }
+
+ fprintf(stderr, "qemu: loading kernel real mode (%#x bytes) at %#zx\n",
+ setup_size-1024, real_addr);
+ fprintf(stderr, "qemu: loading kernel protected mode (%#x bytes) at %#zx\n",
+ kernel_size, reloc_prot_addr);
+}
+
+#ifdef CONFIG_DM
+
+void vmport_init(CPUX86State *env) { }
+void apic_init(CPUX86State *env) { }
+
+#endif /* CONFIG_DM */
--- /dev/null
+/* Xen 8259 stub for interrupt controller emulation
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ * Copyright (c) 2005 Intel corperation
+ * Copyright (c) 2008 Citrix / Xensource
+ *
+ * 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 "pc.h"
+
+#include <xen/hvm/ioreq.h>
+#include <stdio.h>
+
+static void i8259_set_irq(void *opaque, int irq, int level) {
+ xc_hvm_set_isa_irq_level(xc_handle, domid, irq, level);
+}
+
+qemu_irq *i8259_init(qemu_irq parent_irq)
+{
+ return qemu_allocate_irqs(i8259_set_irq, s, 16);
+}
+
+#if 0
+void irq_info(void)
+{
+ term_printf("irq statistics not supported with Xen.\n");
+}
+
+void pic_info(void)
+{
+ term_printf("pic_info not supported with Xen .\n");
+}
+#endif
projects / qemu-xen-4.6-testing.git / commitdiff