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Support u-boot noload images for arm as used by, NetBSD/evbarm GENERIC kernel.

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noload kernels are loaded with the u-boot image header and as a result
the header size needs adding to the entry point.  Fake up a hdr so the
kernel image is loaded at the right address and the entry point is
adjusted appropriately.

The default location for the uboot file is 32MiB above bottom of DRAM.
This matches the recommendation in Documentation/arm/Booting.

Clarify the load_uimage API to state the passing of a load address when an
image doesn't specify one, or when loading a ramdisk is expected.

Adjust callers of load_uimage, etc.

Signed-off-by: Nick Hudson <skrll@netbsd.org>
Message-id: 11488a08-1fe0-a278-2210-deb64731107f@gmx.co.uk
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Nick Hudson 2019-01-07 08:31:50 +00:00 committed by Peter Maydell
parent 619d54a8d8
commit f831f955d4
9 changed files with 33 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
hw/arm/boot.c
View file

@ -30,8 +30,9 @@
* Documentation/arm/Booting and Documentation/arm64/booting.txt
* They have different preferred image load offsets from system RAM base.
*/
#define KERNEL_ARGS_ADDR 0x100
#define KERNEL_LOAD_ADDR 0x00010000
#define KERNEL_ARGS_ADDR 0x100
#define KERNEL_NOLOAD_ADDR 0x02000000
#define KERNEL_LOAD_ADDR 0x00010000
#define KERNEL64_LOAD_ADDR 0x00080000
#define ARM64_TEXT_OFFSET_OFFSET 8
@ -1082,7 +1083,8 @@ void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info)
}
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage_as(info->kernel_filename, &entry, NULL,
uint64_t loadaddr = info->loader_start + KERNEL_NOLOAD_ADDR;
kernel_size = load_uimage_as(info->kernel_filename, &entry, &loadaddr,
&is_linux, NULL, NULL, as);
}
if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64) && kernel_size < 0) {

19
hw/core/loader.c
View file

@ -613,13 +613,26 @@ static int load_uboot_image(const char *filename, hwaddr *ep, hwaddr *loadaddr,
goto out;
if (hdr->ih_type != image_type) {
fprintf(stderr, "Wrong image type %d, expected %d\n", hdr->ih_type,
image_type);
goto out;
if (!(image_type == IH_TYPE_KERNEL &&
hdr->ih_type == IH_TYPE_KERNEL_NOLOAD)) {
fprintf(stderr, "Wrong image type %d, expected %d\n", hdr->ih_type,
image_type);
goto out;
}
}
/* TODO: Implement other image types. */
switch (hdr->ih_type) {
case IH_TYPE_KERNEL_NOLOAD:
if (!loadaddr || *loadaddr == LOAD_UIMAGE_LOADADDR_INVALID) {
fprintf(stderr, "this image format (kernel_noload) cannot be "
"loaded on this machine type");
goto out;
}
hdr->ih_load = *loadaddr + sizeof(*hdr);
hdr->ih_ep += hdr->ih_load;
/* fall through */
case IH_TYPE_KERNEL:
address = hdr->ih_load;
if (translate_fn) {

1
hw/core/uboot_image.h
View file

@ -124,6 +124,7 @@
#define IH_TYPE_SCRIPT 6 /* Script file */
#define IH_TYPE_FILESYSTEM 7 /* Filesystem Image (any type) */
#define IH_TYPE_FLATDT 8 /* Binary Flat Device Tree Blob */
#define IH_TYPE_KERNEL_NOLOAD 14 /* OS Kernel Image (noload) */
/*
* Compression Types

2
hw/microblaze/boot.c
View file

@ -156,7 +156,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
/* If it wasn't an ELF image, try an u-boot image. */
if (kernel_size < 0) {
hwaddr uentry, loadaddr;
hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
NULL, NULL);

2
hw/nios2/boot.c
View file

@ -161,7 +161,7 @@ void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
/* If it wasn't an ELF image, try an u-boot image. */
if (kernel_size < 0) {
hwaddr uentry, loadaddr;
hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
NULL, NULL);

1
hw/ppc/e500.c
View file

@ -995,6 +995,7 @@ void ppce500_init(MachineState *machine)
* Hrm. No ELF image? Try a uImage, maybe someone is giving us an
* ePAPR compliant kernel
*/
loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
payload_size = load_uimage(filename, &bios_entry, &loadaddr, NULL,
NULL, NULL);
if (payload_size < 0) {

2
hw/ppc/ppc440_bamboo.c
View file

@ -179,7 +179,7 @@ static void bamboo_init(MachineState *machine)
CPUPPCState *env;
uint64_t elf_entry;
uint64_t elf_lowaddr;
hwaddr loadaddr = 0;
hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
target_long initrd_size = 0;
DeviceState *dev;
int success;

2
hw/ppc/sam460ex.c
View file

@ -402,7 +402,7 @@ static void sam460ex_init(MachineState *machine)
CPUPPCState *env;
PPC4xxI2CState *i2c[2];
hwaddr entry = UBOOT_ENTRY;
hwaddr loadaddr = 0;
hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
target_long initrd_size = 0;
DeviceState *dev;
SysBusDevice *sbdev;

7
include/hw/loader.h
View file

@ -175,10 +175,15 @@ void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp);
int load_aout(const char *filename, hwaddr addr, int max_sz,
int bswap_needed, hwaddr target_page_size);
#define LOAD_UIMAGE_LOADADDR_INVALID (-1)
/** load_uimage_as:
* @filename: Path of uimage file
* @ep: Populated with program entry point. Ignored if NULL.
* @loadaddr: Populated with the load address. Ignored if NULL.
* @loadaddr: load address if none specified in the image or when loading a
* ramdisk. Populated with the load address. Ignored if NULL or
* LOAD_UIMAGE_LOADADDR_INVALID (images which do not specify a load
* address will not be loadable).
* @is_linux: Is set to true if the image loaded is Linux. Ignored if NULL.
* @translate_fn: optional function to translate load addresses
* @translate_opaque: opaque data passed to @translate_fn