A few machines need to translate the ELF header addresses into physical addresses. Currently the only possibility is to add a value to the addresses. This patch replaces the addend argument by and a translation function and an opaque passed to the function. A NULL function does not translate the address. The patch also convert all machines that have an addend, simplify the PowerPC kernel loading and fix the MIPS kernel loading using this new feature. Other machines may benefit from this feature. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
209 lines
6.5 KiB
C
209 lines
6.5 KiB
C
/*
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* QEMU/mipssim emulation
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*
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* Emulates a very simple machine model similiar to the one use by the
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* proprietary MIPS emulator.
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*
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* Copyright (c) 2007 Thiemo Seufer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "mips.h"
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#include "pc.h"
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#include "isa.h"
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#include "net.h"
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#include "sysemu.h"
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#include "boards.h"
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#include "mips-bios.h"
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#include "loader.h"
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#include "elf.h"
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static struct _loaderparams {
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int ram_size;
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const char *kernel_filename;
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const char *kernel_cmdline;
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const char *initrd_filename;
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} loaderparams;
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typedef struct ResetData {
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CPUState *env;
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uint64_t vector;
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} ResetData;
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static int64_t load_kernel(void)
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{
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int64_t entry, kernel_high;
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long kernel_size;
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long initrd_size;
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ram_addr_t initrd_offset;
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int big_endian;
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#ifdef TARGET_WORDS_BIGENDIAN
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big_endian = 1;
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#else
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big_endian = 0;
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#endif
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kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
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NULL, (uint64_t *)&entry, NULL,
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(uint64_t *)&kernel_high, big_endian,
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ELF_MACHINE, 1);
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if (kernel_size >= 0) {
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if ((entry & ~0x7fffffffULL) == 0x80000000)
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entry = (int32_t)entry;
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} else {
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fprintf(stderr, "qemu: could not load kernel '%s'\n",
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loaderparams.kernel_filename);
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exit(1);
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}
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/* load initrd */
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initrd_size = 0;
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initrd_offset = 0;
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if (loaderparams.initrd_filename) {
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initrd_size = get_image_size (loaderparams.initrd_filename);
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if (initrd_size > 0) {
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initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
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if (initrd_offset + initrd_size > loaderparams.ram_size) {
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fprintf(stderr,
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"qemu: memory too small for initial ram disk '%s'\n",
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loaderparams.initrd_filename);
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exit(1);
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}
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initrd_size = load_image_targphys(loaderparams.initrd_filename,
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initrd_offset, loaderparams.ram_size - initrd_offset);
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}
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if (initrd_size == (target_ulong) -1) {
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fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
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loaderparams.initrd_filename);
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exit(1);
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}
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}
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return entry;
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}
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static void main_cpu_reset(void *opaque)
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{
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ResetData *s = (ResetData *)opaque;
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CPUState *env = s->env;
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cpu_reset(env);
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env->active_tc.PC = s->vector;
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}
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static void
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mips_mipssim_init (ram_addr_t ram_size,
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const char *boot_device,
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const char *kernel_filename, const char *kernel_cmdline,
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const char *initrd_filename, const char *cpu_model)
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{
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char *filename;
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ram_addr_t ram_offset;
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ram_addr_t bios_offset;
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CPUState *env;
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ResetData *reset_info;
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int bios_size;
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/* Init CPUs. */
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if (cpu_model == NULL) {
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#ifdef TARGET_MIPS64
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cpu_model = "5Kf";
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#else
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cpu_model = "24Kf";
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#endif
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}
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env = cpu_init(cpu_model);
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if (!env) {
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fprintf(stderr, "Unable to find CPU definition\n");
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exit(1);
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}
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reset_info = qemu_mallocz(sizeof(ResetData));
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reset_info->env = env;
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reset_info->vector = env->active_tc.PC;
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qemu_register_reset(main_cpu_reset, reset_info);
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/* Allocate RAM. */
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ram_offset = qemu_ram_alloc(ram_size);
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bios_offset = qemu_ram_alloc(BIOS_SIZE);
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cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
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/* Map the BIOS / boot exception handler. */
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cpu_register_physical_memory(0x1fc00000LL,
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BIOS_SIZE, bios_offset | IO_MEM_ROM);
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/* Load a BIOS / boot exception handler image. */
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if (bios_name == NULL)
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bios_name = BIOS_FILENAME;
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
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if (filename) {
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bios_size = load_image_targphys(filename, 0x1fc00000LL, BIOS_SIZE);
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qemu_free(filename);
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} else {
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bios_size = -1;
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}
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if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
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/* Bail out if we have neither a kernel image nor boot vector code. */
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fprintf(stderr,
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"qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n",
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filename);
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exit(1);
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} else {
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/* We have a boot vector start address. */
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env->active_tc.PC = (target_long)(int32_t)0xbfc00000;
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}
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if (kernel_filename) {
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loaderparams.ram_size = ram_size;
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loaderparams.kernel_filename = kernel_filename;
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loaderparams.kernel_cmdline = kernel_cmdline;
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loaderparams.initrd_filename = initrd_filename;
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reset_info->vector = load_kernel();
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}
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/* Init CPU internal devices. */
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cpu_mips_irq_init_cpu(env);
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cpu_mips_clock_init(env);
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/* Register 64 KB of ISA IO space at 0x1fd00000. */
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isa_mmio_init(0x1fd00000, 0x00010000);
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/* A single 16450 sits at offset 0x3f8. It is attached to
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MIPS CPU INT2, which is interrupt 4. */
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if (serial_hds[0])
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serial_init(0x3f8, env->irq[4], 115200, serial_hds[0]);
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if (nd_table[0].vlan)
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/* MIPSnet uses the MIPS CPU INT0, which is interrupt 2. */
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mipsnet_init(0x4200, env->irq[2], &nd_table[0]);
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}
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static QEMUMachine mips_mipssim_machine = {
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.name = "mipssim",
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.desc = "MIPS MIPSsim platform",
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.init = mips_mipssim_init,
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};
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static void mips_mipssim_machine_init(void)
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{
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qemu_register_machine(&mips_mipssim_machine);
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}
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machine_init(mips_mipssim_machine_init);
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