/*
* ARM kernel loader.
*
* Copyright (c) 2006 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the LGPL.
*
*/
#ifndef HW_ARM_BOOT_H
#define HW_ARM_BOOT_H
#include "target/arm/cpu-qom.h"
#include "qemu/notify.h"
typedef enum {
ARM_ENDIANNESS_UNKNOWN = 0,
ARM_ENDIANNESS_LE,
ARM_ENDIANNESS_BE8,
ARM_ENDIANNESS_BE32,
} arm_endianness;
/**
* armv7m_load_kernel:
* @cpu: CPU
* @kernel_filename: file to load
* @mem_size: mem_size: maximum image size to load
*
* Load the guest image for an ARMv7M system. This must be called by
* any ARMv7M board. (This is necessary to ensure that the CPU resets
* correctly on system reset, as well as for kernel loading.)
*/
void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size);
/* arm_boot.c */
struct arm_boot_info {
uint64_t ram_size;
const char *kernel_filename;
const char *kernel_cmdline;
const char *initrd_filename;
const char *dtb_filename;
hwaddr loader_start;
hwaddr dtb_start;
hwaddr dtb_limit;
/* If set to True, arm_load_kernel() will not load DTB.
* It allows board to load DTB manually later.
* (default: False)
*/
bool skip_dtb_autoload;
/* multicore boards that use the default secondary core boot functions
* need to put the address of the secondary boot code, the boot reg,
* and the GIC address in the next 3 values, respectively. boards that
* have their own boot functions can use these values as they want.
*/
hwaddr smp_loader_start;
hwaddr smp_bootreg_addr;
hwaddr gic_cpu_if_addr;
int board_id;
/* ARM machines that support the ARM Security Extensions use this field to
* control whether Linux is booted as secure(true) or non-secure(false).
*/
bool secure_boot;
int (*atag_board)(const struct arm_boot_info *info, void *p);
/* multicore boards that use the default secondary core boot functions
* can ignore these two function calls. If the default functions won't
* work, then write_secondary_boot() should write a suitable blob of
* code mimicking the secondary CPU startup process used by the board's
* boot loader/boot ROM code, and secondary_cpu_reset_hook() should
* perform any necessary CPU reset handling and set the PC for the
* secondary CPUs to point at this boot blob.
*
* These hooks won't be called if secondary CPUs are booting via
* emulated PSCI (see psci_conduit below).
*/
void (*write_secondary_boot)(ARMCPU *cpu,
const struct arm_boot_info *info);
void (*secondary_cpu_reset_hook)(ARMCPU *cpu,
const struct arm_boot_info *info);
/* if a board is able to create a dtb without a dtb file then it
* sets get_dtb. This will only be used if no dtb file is provided
* by the user. On success, sets *size to the length of the created
* dtb, and returns a pointer to it. (The caller must free this memory
* with g_free() when it has finished with it.) On failure, returns NULL.
*/
void *(*get_dtb)(const struct arm_boot_info *info, int *size);
/* if a board needs to be able to modify a device tree provided by
* the user it should implement this hook.
*/
void (*modify_dtb)(const struct arm_boot_info *info, void *fdt);
/*
* If a board wants to use the QEMU emulated-firmware PSCI support,
* it should set this to QEMU_PSCI_CONDUIT_HVC or QEMU_PSCI_CONDUIT_SMC
* as appropriate. arm_load_kernel() will set the psci-conduit and
* start-powered-off properties on the CPUs accordingly.
* Note that if the guest image is started at the same exception level
* as the conduit specifies calls should go to (eg guest firmware booted
* to EL3) then PSCI will not be enabled.
*/
int psci_conduit;
/* Used internally by arm_boot.c */
int is_linux;
hwaddr initrd_start;
hwaddr initrd_size;
hwaddr entry;
/* Boot firmware has been loaded, typically at address 0, with -bios or
* -pflash. It also implies that fw_cfg_find() will succeed.
*/
bool firmware_loaded;
/* Address at which board specific loader/setup code exists. If enabled,
* this code-blob will run before anything else. It must return to the
* caller via the link register. There is no stack set up. Enabled by
* defining write_board_setup, which is responsible for loading the blob
* to the specified address.
*/
hwaddr board_setup_addr;
void (*write_board_setup)(ARMCPU *cpu,
const struct arm_boot_info *info);
/*
* If set, the board specific loader/setup blob will be run from secure
* mode, regardless of secure_boot. The blob becomes responsible for
* changing to non-secure state if implementing a non-secure boot,
* including setting up EL3/Secure registers such as the NSACR as
* required by the Linux booting ABI before the switch to non-secure.
*/
bool secure_board_setup;
arm_endianness endianness;
};
/**
* arm_load_kernel - Loads memory with everything needed to boot
*
* @cpu: handle to the first CPU object
* @info: handle to the boot info struct
* Registers a machine init done notifier that copies to memory
* everything needed to boot, depending on machine and user options:
* kernel image, boot loaders, initrd, dtb. Also registers the CPU
* reset handler.
*
* In case the machine file supports the platform bus device and its
* dynamically instantiable sysbus devices, this function must be called
* before sysbus-fdt arm_register_platform_bus_fdt_creator. Indeed the
* machine init done notifiers are called in registration reverse order.
*/
void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info);
AddressSpace *arm_boot_address_space(ARMCPU *cpu,
const struct arm_boot_info *info);
/**
* arm_load_dtb() - load a device tree binary image into memory
* @addr: the address to load the image at
* @binfo: struct describing the boot environment
* @addr_limit: upper limit of the available memory area at @addr
* @as: address space to load image to
*
* Load a device tree supplied by the machine or by the user with the
* '-dtb' command line option, and put it at offset @addr in target
* memory.
*
* If @addr_limit contains a meaningful value (i.e., it is strictly greater
* than @addr), the device tree is only loaded if its size does not exceed
* the limit.
*
* Returns: the size of the device tree image on success,
* 0 if the image size exceeds the limit,
* -1 on errors.
*
* Note: Must not be called unless have_dtb(binfo) is true.
*/
int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
hwaddr addr_limit, AddressSpace *as, MachineState *ms);
/* Write a secure board setup routine with a dummy handler for SMCs */
void arm_write_secure_board_setup_dummy_smc(ARMCPU *cpu,
const struct arm_boot_info *info,
hwaddr mvbar_addr);
#endif /* HW_ARM_BOOT_H */
