4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GPL.
12 #include "hw/arm/arm.h"
13 #include "hw/arm/linux-boot-if.h"
14 #include "sysemu/sysemu.h"
15 #include "hw/boards.h"
16 #include "hw/loader.h"
18 #include "sysemu/device_tree.h"
19 #include "qemu/config-file.h"
20 #include "exec/address-spaces.h"
22 /* Kernel boot protocol is specified in the kernel docs
23 * Documentation/arm/Booting and Documentation/arm64/booting.txt
24 * They have different preferred image load offsets from system RAM base.
26 #define KERNEL_ARGS_ADDR 0x100
27 #define KERNEL_LOAD_ADDR 0x00010000
28 #define KERNEL64_LOAD_ADDR 0x00080000
31 FIXUP_NONE
= 0, /* do nothing */
32 FIXUP_TERMINATOR
, /* end of insns */
33 FIXUP_BOARDID
, /* overwrite with board ID number */
34 FIXUP_ARGPTR
, /* overwrite with pointer to kernel args */
35 FIXUP_ENTRYPOINT
, /* overwrite with kernel entry point */
36 FIXUP_GIC_CPU_IF
, /* overwrite with GIC CPU interface address */
37 FIXUP_BOOTREG
, /* overwrite with boot register address */
38 FIXUP_DSB
, /* overwrite with correct DSB insn for cpu */
42 typedef struct ARMInsnFixup
{
47 static const ARMInsnFixup bootloader_aarch64
[] = {
48 { 0x580000c0 }, /* ldr x0, arg ; Load the lower 32-bits of DTB */
49 { 0xaa1f03e1 }, /* mov x1, xzr */
50 { 0xaa1f03e2 }, /* mov x2, xzr */
51 { 0xaa1f03e3 }, /* mov x3, xzr */
52 { 0x58000084 }, /* ldr x4, entry ; Load the lower 32-bits of kernel entry */
53 { 0xd61f0080 }, /* br x4 ; Jump to the kernel entry point */
54 { 0, FIXUP_ARGPTR
}, /* arg: .word @DTB Lower 32-bits */
55 { 0 }, /* .word @DTB Higher 32-bits */
56 { 0, FIXUP_ENTRYPOINT
}, /* entry: .word @Kernel Entry Lower 32-bits */
57 { 0 }, /* .word @Kernel Entry Higher 32-bits */
58 { 0, FIXUP_TERMINATOR
}
61 /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
62 static const ARMInsnFixup bootloader
[] = {
63 { 0xe3a00000 }, /* mov r0, #0 */
64 { 0xe59f1004 }, /* ldr r1, [pc, #4] */
65 { 0xe59f2004 }, /* ldr r2, [pc, #4] */
66 { 0xe59ff004 }, /* ldr pc, [pc, #4] */
69 { 0, FIXUP_ENTRYPOINT
},
70 { 0, FIXUP_TERMINATOR
}
73 /* Handling for secondary CPU boot in a multicore system.
74 * Unlike the uniprocessor/primary CPU boot, this is platform
75 * dependent. The default code here is based on the secondary
76 * CPU boot protocol used on realview/vexpress boards, with
77 * some parameterisation to increase its flexibility.
78 * QEMU platform models for which this code is not appropriate
79 * should override write_secondary_boot and secondary_cpu_reset_hook
82 * This code enables the interrupt controllers for the secondary
83 * CPUs and then puts all the secondary CPUs into a loop waiting
84 * for an interprocessor interrupt and polling a configurable
85 * location for the kernel secondary CPU entry point.
87 #define DSB_INSN 0xf57ff04f
88 #define CP15_DSB_INSN 0xee070f9a /* mcr cp15, 0, r0, c7, c10, 4 */
90 static const ARMInsnFixup smpboot
[] = {
91 { 0xe59f2028 }, /* ldr r2, gic_cpu_if */
92 { 0xe59f0028 }, /* ldr r0, bootreg_addr */
93 { 0xe3a01001 }, /* mov r1, #1 */
94 { 0xe5821000 }, /* str r1, [r2] - set GICC_CTLR.Enable */
95 { 0xe3a010ff }, /* mov r1, #0xff */
96 { 0xe5821004 }, /* str r1, [r2, 4] - set GIC_PMR.Priority to 0xff */
97 { 0, FIXUP_DSB
}, /* dsb */
98 { 0xe320f003 }, /* wfi */
99 { 0xe5901000 }, /* ldr r1, [r0] */
100 { 0xe1110001 }, /* tst r1, r1 */
101 { 0x0afffffb }, /* beq <wfi> */
102 { 0xe12fff11 }, /* bx r1 */
103 { 0, FIXUP_GIC_CPU_IF
}, /* gic_cpu_if: .word 0x.... */
104 { 0, FIXUP_BOOTREG
}, /* bootreg_addr: .word 0x.... */
105 { 0, FIXUP_TERMINATOR
}
108 static void write_bootloader(const char *name
, hwaddr addr
,
109 const ARMInsnFixup
*insns
, uint32_t *fixupcontext
)
111 /* Fix up the specified bootloader fragment and write it into
112 * guest memory using rom_add_blob_fixed(). fixupcontext is
113 * an array giving the values to write in for the fixup types
114 * which write a value into the code array.
120 while (insns
[len
].fixup
!= FIXUP_TERMINATOR
) {
124 code
= g_new0(uint32_t, len
);
126 for (i
= 0; i
< len
; i
++) {
127 uint32_t insn
= insns
[i
].insn
;
128 FixupType fixup
= insns
[i
].fixup
;
135 case FIXUP_ENTRYPOINT
:
136 case FIXUP_GIC_CPU_IF
:
139 insn
= fixupcontext
[fixup
];
144 code
[i
] = tswap32(insn
);
147 rom_add_blob_fixed(name
, code
, len
* sizeof(uint32_t), addr
);
152 static void default_write_secondary(ARMCPU
*cpu
,
153 const struct arm_boot_info
*info
)
155 uint32_t fixupcontext
[FIXUP_MAX
];
157 fixupcontext
[FIXUP_GIC_CPU_IF
] = info
->gic_cpu_if_addr
;
158 fixupcontext
[FIXUP_BOOTREG
] = info
->smp_bootreg_addr
;
159 if (arm_feature(&cpu
->env
, ARM_FEATURE_V7
)) {
160 fixupcontext
[FIXUP_DSB
] = DSB_INSN
;
162 fixupcontext
[FIXUP_DSB
] = CP15_DSB_INSN
;
165 write_bootloader("smpboot", info
->smp_loader_start
,
166 smpboot
, fixupcontext
);
169 static void default_reset_secondary(ARMCPU
*cpu
,
170 const struct arm_boot_info
*info
)
172 CPUState
*cs
= CPU(cpu
);
174 address_space_stl_notdirty(&address_space_memory
, info
->smp_bootreg_addr
,
175 0, MEMTXATTRS_UNSPECIFIED
, NULL
);
176 cpu_set_pc(cs
, info
->smp_loader_start
);
179 static inline bool have_dtb(const struct arm_boot_info
*info
)
181 return info
->dtb_filename
|| info
->get_dtb
;
184 #define WRITE_WORD(p, value) do { \
185 address_space_stl_notdirty(&address_space_memory, p, value, \
186 MEMTXATTRS_UNSPECIFIED, NULL); \
190 static void set_kernel_args(const struct arm_boot_info
*info
)
192 int initrd_size
= info
->initrd_size
;
193 hwaddr base
= info
->loader_start
;
196 p
= base
+ KERNEL_ARGS_ADDR
;
199 WRITE_WORD(p
, 0x54410001);
201 WRITE_WORD(p
, 0x1000);
204 /* TODO: handle multiple chips on one ATAG list */
206 WRITE_WORD(p
, 0x54410002);
207 WRITE_WORD(p
, info
->ram_size
);
208 WRITE_WORD(p
, info
->loader_start
);
212 WRITE_WORD(p
, 0x54420005);
213 WRITE_WORD(p
, info
->initrd_start
);
214 WRITE_WORD(p
, initrd_size
);
216 if (info
->kernel_cmdline
&& *info
->kernel_cmdline
) {
220 cmdline_size
= strlen(info
->kernel_cmdline
);
221 cpu_physical_memory_write(p
+ 8, info
->kernel_cmdline
,
223 cmdline_size
= (cmdline_size
>> 2) + 1;
224 WRITE_WORD(p
, cmdline_size
+ 2);
225 WRITE_WORD(p
, 0x54410009);
226 p
+= cmdline_size
* 4;
228 if (info
->atag_board
) {
231 uint8_t atag_board_buf
[0x1000];
233 atag_board_len
= (info
->atag_board(info
, atag_board_buf
) + 3) & ~3;
234 WRITE_WORD(p
, (atag_board_len
+ 8) >> 2);
235 WRITE_WORD(p
, 0x414f4d50);
236 cpu_physical_memory_write(p
, atag_board_buf
, atag_board_len
);
244 static void set_kernel_args_old(const struct arm_boot_info
*info
)
248 int initrd_size
= info
->initrd_size
;
249 hwaddr base
= info
->loader_start
;
251 /* see linux/include/asm-arm/setup.h */
252 p
= base
+ KERNEL_ARGS_ADDR
;
256 WRITE_WORD(p
, info
->ram_size
/ 4096);
259 #define FLAG_READONLY 1
260 #define FLAG_RDLOAD 4
261 #define FLAG_RDPROMPT 8
263 WRITE_WORD(p
, FLAG_READONLY
| FLAG_RDLOAD
| FLAG_RDPROMPT
);
265 WRITE_WORD(p
, (31 << 8) | 0); /* /dev/mtdblock0 */
274 /* memc_control_reg */
276 /* unsigned char sounddefault */
277 /* unsigned char adfsdrives */
278 /* unsigned char bytes_per_char_h */
279 /* unsigned char bytes_per_char_v */
281 /* pages_in_bank[4] */
290 WRITE_WORD(p
, info
->initrd_start
);
295 WRITE_WORD(p
, initrd_size
);
300 /* system_serial_low */
302 /* system_serial_high */
306 /* zero unused fields */
307 while (p
< base
+ KERNEL_ARGS_ADDR
+ 256 + 1024) {
310 s
= info
->kernel_cmdline
;
312 cpu_physical_memory_write(p
, s
, strlen(s
) + 1);
319 * load_dtb() - load a device tree binary image into memory
320 * @addr: the address to load the image at
321 * @binfo: struct describing the boot environment
322 * @addr_limit: upper limit of the available memory area at @addr
324 * Load a device tree supplied by the machine or by the user with the
325 * '-dtb' command line option, and put it at offset @addr in target
328 * If @addr_limit contains a meaningful value (i.e., it is strictly greater
329 * than @addr), the device tree is only loaded if its size does not exceed
332 * Returns: the size of the device tree image on success,
333 * 0 if the image size exceeds the limit,
336 * Note: Must not be called unless have_dtb(binfo) is true.
338 static int load_dtb(hwaddr addr
, const struct arm_boot_info
*binfo
,
343 uint32_t acells
, scells
;
345 if (binfo
->dtb_filename
) {
347 filename
= qemu_find_file(QEMU_FILE_TYPE_BIOS
, binfo
->dtb_filename
);
349 fprintf(stderr
, "Couldn't open dtb file %s\n", binfo
->dtb_filename
);
353 fdt
= load_device_tree(filename
, &size
);
355 fprintf(stderr
, "Couldn't open dtb file %s\n", filename
);
361 fdt
= binfo
->get_dtb(binfo
, &size
);
363 fprintf(stderr
, "Board was unable to create a dtb blob\n");
368 if (addr_limit
> addr
&& size
> (addr_limit
- addr
)) {
369 /* Installing the device tree blob at addr would exceed addr_limit.
370 * Whether this constitutes failure is up to the caller to decide,
371 * so just return 0 as size, i.e., no error.
377 acells
= qemu_fdt_getprop_cell(fdt
, "/", "#address-cells");
378 scells
= qemu_fdt_getprop_cell(fdt
, "/", "#size-cells");
379 if (acells
== 0 || scells
== 0) {
380 fprintf(stderr
, "dtb file invalid (#address-cells or #size-cells 0)\n");
384 if (scells
< 2 && binfo
->ram_size
>= (1ULL << 32)) {
385 /* This is user error so deserves a friendlier error message
386 * than the failure of setprop_sized_cells would provide
388 fprintf(stderr
, "qemu: dtb file not compatible with "
393 rc
= qemu_fdt_setprop_sized_cells(fdt
, "/memory", "reg",
394 acells
, binfo
->loader_start
,
395 scells
, binfo
->ram_size
);
397 fprintf(stderr
, "couldn't set /memory/reg\n");
401 if (binfo
->kernel_cmdline
&& *binfo
->kernel_cmdline
) {
402 rc
= qemu_fdt_setprop_string(fdt
, "/chosen", "bootargs",
403 binfo
->kernel_cmdline
);
405 fprintf(stderr
, "couldn't set /chosen/bootargs\n");
410 if (binfo
->initrd_size
) {
411 rc
= qemu_fdt_setprop_cell(fdt
, "/chosen", "linux,initrd-start",
412 binfo
->initrd_start
);
414 fprintf(stderr
, "couldn't set /chosen/linux,initrd-start\n");
418 rc
= qemu_fdt_setprop_cell(fdt
, "/chosen", "linux,initrd-end",
419 binfo
->initrd_start
+ binfo
->initrd_size
);
421 fprintf(stderr
, "couldn't set /chosen/linux,initrd-end\n");
426 if (binfo
->modify_dtb
) {
427 binfo
->modify_dtb(binfo
, fdt
);
430 qemu_fdt_dumpdtb(fdt
, size
);
432 /* Put the DTB into the memory map as a ROM image: this will ensure
433 * the DTB is copied again upon reset, even if addr points into RAM.
435 rom_add_blob_fixed("dtb", fdt
, size
, addr
);
446 static void do_cpu_reset(void *opaque
)
448 ARMCPU
*cpu
= opaque
;
449 CPUState
*cs
= CPU(cpu
);
450 CPUARMState
*env
= &cpu
->env
;
451 const struct arm_boot_info
*info
= env
->boot_info
;
455 if (!info
->is_linux
) {
456 /* Jump to the entry point. */
457 uint64_t entry
= info
->entry
;
460 env
->thumb
= info
->entry
& 1;
463 cpu_set_pc(cs
, entry
);
465 /* If we are booting Linux then we need to check whether we are
466 * booting into secure or non-secure state and adjust the state
467 * accordingly. Out of reset, ARM is defined to be in secure state
468 * (SCR.NS = 0), we change that here if non-secure boot has been
471 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
472 /* AArch64 is defined to come out of reset into EL3 if enabled.
473 * If we are booting Linux then we need to adjust our EL as
474 * Linux expects us to be in EL2 or EL1. AArch32 resets into
475 * SVC, which Linux expects, so no privilege/exception level to
479 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
480 env
->pstate
= PSTATE_MODE_EL2h
;
482 env
->pstate
= PSTATE_MODE_EL1h
;
486 /* Set to non-secure if not a secure boot */
487 if (!info
->secure_boot
) {
488 /* Linux expects non-secure state */
489 env
->cp15
.scr_el3
|= SCR_NS
;
493 if (cs
== first_cpu
) {
494 cpu_set_pc(cs
, info
->loader_start
);
496 if (!have_dtb(info
)) {
498 set_kernel_args_old(info
);
500 set_kernel_args(info
);
504 info
->secondary_cpu_reset_hook(cpu
, info
);
511 * load_image_to_fw_cfg() - Load an image file into an fw_cfg entry identified
513 * @fw_cfg: The firmware config instance to store the data in.
514 * @size_key: The firmware config key to store the size of the loaded
515 * data under, with fw_cfg_add_i32().
516 * @data_key: The firmware config key to store the loaded data under,
517 * with fw_cfg_add_bytes().
518 * @image_name: The name of the image file to load. If it is NULL, the
519 * function returns without doing anything.
520 * @try_decompress: Whether the image should be decompressed (gunzipped) before
521 * adding it to fw_cfg. If decompression fails, the image is
524 * In case of failure, the function prints an error message to stderr and the
525 * process exits with status 1.
527 static void load_image_to_fw_cfg(FWCfgState
*fw_cfg
, uint16_t size_key
,
528 uint16_t data_key
, const char *image_name
,
534 if (image_name
== NULL
) {
538 if (try_decompress
) {
539 size
= load_image_gzipped_buffer(image_name
,
540 LOAD_IMAGE_MAX_GUNZIP_BYTES
, &data
);
543 if (size
== (size_t)-1) {
547 if (!g_file_get_contents(image_name
, &contents
, &length
, NULL
)) {
548 fprintf(stderr
, "failed to load \"%s\"\n", image_name
);
552 data
= (uint8_t *)contents
;
555 fw_cfg_add_i32(fw_cfg
, size_key
, size
);
556 fw_cfg_add_bytes(fw_cfg
, data_key
, data
, size
);
559 static int do_arm_linux_init(Object
*obj
, void *opaque
)
561 if (object_dynamic_cast(obj
, TYPE_ARM_LINUX_BOOT_IF
)) {
562 ARMLinuxBootIf
*albif
= ARM_LINUX_BOOT_IF(obj
);
563 ARMLinuxBootIfClass
*albifc
= ARM_LINUX_BOOT_IF_GET_CLASS(obj
);
564 struct arm_boot_info
*info
= opaque
;
566 if (albifc
->arm_linux_init
) {
567 albifc
->arm_linux_init(albif
, info
->secure_boot
);
573 static void arm_load_kernel_notify(Notifier
*notifier
, void *data
)
579 uint64_t elf_entry
, elf_low_addr
, elf_high_addr
;
581 hwaddr entry
, kernel_load_offset
;
583 static const ARMInsnFixup
*primary_loader
;
584 ArmLoadKernelNotifier
*n
= DO_UPCAST(ArmLoadKernelNotifier
,
586 ARMCPU
*cpu
= n
->cpu
;
587 struct arm_boot_info
*info
=
588 container_of(n
, struct arm_boot_info
, load_kernel_notifier
);
590 /* Load the kernel. */
591 if (!info
->kernel_filename
|| info
->firmware_loaded
) {
593 if (have_dtb(info
)) {
594 /* If we have a device tree blob, but no kernel to supply it to (or
595 * the kernel is supposed to be loaded by the bootloader), copy the
596 * DTB to the base of RAM for the bootloader to pick up.
598 if (load_dtb(info
->loader_start
, info
, 0) < 0) {
603 if (info
->kernel_filename
) {
605 bool try_decompressing_kernel
;
607 fw_cfg
= fw_cfg_find();
608 try_decompressing_kernel
= arm_feature(&cpu
->env
,
609 ARM_FEATURE_AARCH64
);
611 /* Expose the kernel, the command line, and the initrd in fw_cfg.
612 * We don't process them here at all, it's all left to the
615 load_image_to_fw_cfg(fw_cfg
,
616 FW_CFG_KERNEL_SIZE
, FW_CFG_KERNEL_DATA
,
617 info
->kernel_filename
,
618 try_decompressing_kernel
);
619 load_image_to_fw_cfg(fw_cfg
,
620 FW_CFG_INITRD_SIZE
, FW_CFG_INITRD_DATA
,
621 info
->initrd_filename
, false);
623 if (info
->kernel_cmdline
) {
624 fw_cfg_add_i32(fw_cfg
, FW_CFG_CMDLINE_SIZE
,
625 strlen(info
->kernel_cmdline
) + 1);
626 fw_cfg_add_string(fw_cfg
, FW_CFG_CMDLINE_DATA
,
627 info
->kernel_cmdline
);
631 /* We will start from address 0 (typically a boot ROM image) in the
632 * same way as hardware.
637 if (arm_feature(&cpu
->env
, ARM_FEATURE_AARCH64
)) {
638 primary_loader
= bootloader_aarch64
;
639 kernel_load_offset
= KERNEL64_LOAD_ADDR
;
640 elf_machine
= EM_AARCH64
;
642 primary_loader
= bootloader
;
643 kernel_load_offset
= KERNEL_LOAD_ADDR
;
644 elf_machine
= EM_ARM
;
647 info
->dtb_filename
= qemu_opt_get(qemu_get_machine_opts(), "dtb");
649 if (!info
->secondary_cpu_reset_hook
) {
650 info
->secondary_cpu_reset_hook
= default_reset_secondary
;
652 if (!info
->write_secondary_boot
) {
653 info
->write_secondary_boot
= default_write_secondary
;
656 if (info
->nb_cpus
== 0)
659 #ifdef TARGET_WORDS_BIGENDIAN
665 /* We want to put the initrd far enough into RAM that when the
666 * kernel is uncompressed it will not clobber the initrd. However
667 * on boards without much RAM we must ensure that we still leave
668 * enough room for a decent sized initrd, and on boards with large
669 * amounts of RAM we must avoid the initrd being so far up in RAM
670 * that it is outside lowmem and inaccessible to the kernel.
671 * So for boards with less than 256MB of RAM we put the initrd
672 * halfway into RAM, and for boards with 256MB of RAM or more we put
673 * the initrd at 128MB.
675 info
->initrd_start
= info
->loader_start
+
676 MIN(info
->ram_size
/ 2, 128 * 1024 * 1024);
678 /* Assume that raw images are linux kernels, and ELF images are not. */
679 kernel_size
= load_elf(info
->kernel_filename
, NULL
, NULL
, &elf_entry
,
680 &elf_low_addr
, &elf_high_addr
, big_endian
,
682 if (kernel_size
> 0 && have_dtb(info
)) {
683 /* If there is still some room left at the base of RAM, try and put
684 * the DTB there like we do for images loaded with -bios or -pflash.
686 if (elf_low_addr
> info
->loader_start
687 || elf_high_addr
< info
->loader_start
) {
688 /* Pass elf_low_addr as address limit to load_dtb if it may be
689 * pointing into RAM, otherwise pass '0' (no limit)
691 if (elf_low_addr
< info
->loader_start
) {
694 if (load_dtb(info
->loader_start
, info
, elf_low_addr
) < 0) {
700 if (kernel_size
< 0) {
701 kernel_size
= load_uimage(info
->kernel_filename
, &entry
, NULL
,
702 &is_linux
, NULL
, NULL
);
704 /* On aarch64, it's the bootloader's job to uncompress the kernel. */
705 if (arm_feature(&cpu
->env
, ARM_FEATURE_AARCH64
) && kernel_size
< 0) {
706 entry
= info
->loader_start
+ kernel_load_offset
;
707 kernel_size
= load_image_gzipped(info
->kernel_filename
, entry
,
708 info
->ram_size
- kernel_load_offset
);
711 if (kernel_size
< 0) {
712 entry
= info
->loader_start
+ kernel_load_offset
;
713 kernel_size
= load_image_targphys(info
->kernel_filename
, entry
,
714 info
->ram_size
- kernel_load_offset
);
717 if (kernel_size
< 0) {
718 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
719 info
->kernel_filename
);
724 uint32_t fixupcontext
[FIXUP_MAX
];
726 if (info
->initrd_filename
) {
727 initrd_size
= load_ramdisk(info
->initrd_filename
,
731 if (initrd_size
< 0) {
732 initrd_size
= load_image_targphys(info
->initrd_filename
,
737 if (initrd_size
< 0) {
738 fprintf(stderr
, "qemu: could not load initrd '%s'\n",
739 info
->initrd_filename
);
745 info
->initrd_size
= initrd_size
;
747 fixupcontext
[FIXUP_BOARDID
] = info
->board_id
;
749 /* for device tree boot, we pass the DTB directly in r2. Otherwise
750 * we point to the kernel args.
752 if (have_dtb(info
)) {
756 if (elf_machine
== EM_AARCH64
) {
758 * Some AArch64 kernels on early bootup map the fdt region as
760 * [ ALIGN_DOWN(fdt, 2MB) ... ALIGN_DOWN(fdt, 2MB) + 2MB ]
762 * Let's play safe and prealign it to 2MB to give us some space.
764 align
= 2 * 1024 * 1024;
767 * Some 32bit kernels will trash anything in the 4K page the
768 * initrd ends in, so make sure the DTB isn't caught up in that.
773 /* Place the DTB after the initrd in memory with alignment. */
774 dtb_start
= QEMU_ALIGN_UP(info
->initrd_start
+ initrd_size
, align
);
775 if (load_dtb(dtb_start
, info
, 0) < 0) {
778 fixupcontext
[FIXUP_ARGPTR
] = dtb_start
;
780 fixupcontext
[FIXUP_ARGPTR
] = info
->loader_start
+ KERNEL_ARGS_ADDR
;
781 if (info
->ram_size
>= (1ULL << 32)) {
782 fprintf(stderr
, "qemu: RAM size must be less than 4GB to boot"
783 " Linux kernel using ATAGS (try passing a device tree"
788 fixupcontext
[FIXUP_ENTRYPOINT
] = entry
;
790 write_bootloader("bootloader", info
->loader_start
,
791 primary_loader
, fixupcontext
);
793 if (info
->nb_cpus
> 1) {
794 info
->write_secondary_boot(cpu
, info
);
797 /* Notify devices which need to fake up firmware initialization
798 * that we're doing a direct kernel boot.
800 object_child_foreach_recursive(object_get_root(),
801 do_arm_linux_init
, info
);
803 info
->is_linux
= is_linux
;
805 for (cs
= CPU(cpu
); cs
; cs
= CPU_NEXT(cs
)) {
806 ARM_CPU(cs
)->env
.boot_info
= info
;
810 void arm_load_kernel(ARMCPU
*cpu
, struct arm_boot_info
*info
)
814 info
->load_kernel_notifier
.cpu
= cpu
;
815 info
->load_kernel_notifier
.notifier
.notify
= arm_load_kernel_notify
;
816 qemu_add_machine_init_done_notifier(&info
->load_kernel_notifier
.notifier
);
818 /* CPU objects (unlike devices) are not automatically reset on system
819 * reset, so we must always register a handler to do so. If we're
820 * actually loading a kernel, the handler is also responsible for
821 * arranging that we start it correctly.
823 for (cs
= CPU(cpu
); cs
; cs
= CPU_NEXT(cs
)) {
824 qemu_register_reset(do_cpu_reset
, ARM_CPU(cs
));
828 static const TypeInfo arm_linux_boot_if_info
= {
829 .name
= TYPE_ARM_LINUX_BOOT_IF
,
830 .parent
= TYPE_INTERFACE
,
831 .class_size
= sizeof(ARMLinuxBootIfClass
),
834 static void arm_linux_boot_register_types(void)
836 type_register_static(&arm_linux_boot_if_info
);
839 type_init(arm_linux_boot_register_types
)