LXR qemu/include/hw/arm/arm.h

   1/*
   2 * Misc ARM declarations
   3 *
   4 * Copyright (c) 2006 CodeSourcery.
   5 * Written by Paul Brook
   6 *
   7 * This code is licensed under the LGPL.
   8 *
   9 */
  10
  11#ifndef HW_ARM_H
  12#define HW_ARM_H
  13
  14#include "exec/memory.h"
  15#include "target-arm/cpu-qom.h"
  16#include "hw/irq.h"
  17#include "qemu/notify.h"
  18
  19typedef enum {
  20    ARM_ENDIANNESS_UNKNOWN = 0,
  21    ARM_ENDIANNESS_LE,
  22    ARM_ENDIANNESS_BE8,
  23    ARM_ENDIANNESS_BE32,
  24} arm_endianness;
  25
  26/* armv7m.c */
  27DeviceState *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
  28                      const char *kernel_filename, const char *cpu_model);
  29
  30/*
  31 * struct used as a parameter of the arm_load_kernel machine init
  32 * done notifier
  33 */
  34typedef struct {
  35    Notifier notifier; /* actual notifier */
  36    ARMCPU *cpu; /* handle to the first cpu object */
  37} ArmLoadKernelNotifier;
  38
  39/* arm_boot.c */
  40struct arm_boot_info {
  41    uint64_t ram_size;
  42    const char *kernel_filename;
  43    const char *kernel_cmdline;
  44    const char *initrd_filename;
  45    const char *dtb_filename;
  46    hwaddr loader_start;
  47    /* multicore boards that use the default secondary core boot functions
  48     * need to put the address of the secondary boot code, the boot reg,
  49     * and the GIC address in the next 3 values, respectively. boards that
  50     * have their own boot functions can use these values as they want.
  51     */
  52    hwaddr smp_loader_start;
  53    hwaddr smp_bootreg_addr;
  54    hwaddr gic_cpu_if_addr;
  55    int nb_cpus;
  56    int board_id;
  57    /* ARM machines that support the ARM Security Extensions use this field to
  58     * control whether Linux is booted as secure(true) or non-secure(false).
  59     */
  60    bool secure_boot;
  61    int (*atag_board)(const struct arm_boot_info *info, void *p);
  62    /* multicore boards that use the default secondary core boot functions
  63     * can ignore these two function calls. If the default functions won't
  64     * work, then write_secondary_boot() should write a suitable blob of
  65     * code mimicking the secondary CPU startup process used by the board's
  66     * boot loader/boot ROM code, and secondary_cpu_reset_hook() should
  67     * perform any necessary CPU reset handling and set the PC for the
  68     * secondary CPUs to point at this boot blob.
  69     */
  70    void (*write_secondary_boot)(ARMCPU *cpu,
  71                                 const struct arm_boot_info *info);
  72    void (*secondary_cpu_reset_hook)(ARMCPU *cpu,
  73                                     const struct arm_boot_info *info);
  74    /* if a board is able to create a dtb without a dtb file then it
  75     * sets get_dtb. This will only be used if no dtb file is provided
  76     * by the user. On success, sets *size to the length of the created
  77     * dtb, and returns a pointer to it. (The caller must free this memory
  78     * with g_free() when it has finished with it.) On failure, returns NULL.
  79     */
  80    void *(*get_dtb)(const struct arm_boot_info *info, int *size);
  81    /* if a board needs to be able to modify a device tree provided by
  82     * the user it should implement this hook.
  83     */
  84    void (*modify_dtb)(const struct arm_boot_info *info, void *fdt);
  85    /* machine init done notifier executing arm_load_dtb */
  86    ArmLoadKernelNotifier load_kernel_notifier;
  87    /* Used internally by arm_boot.c */
  88    int is_linux;
  89    hwaddr initrd_start;
  90    hwaddr initrd_size;
  91    hwaddr entry;
  92
  93    /* Boot firmware has been loaded, typically at address 0, with -bios or
  94     * -pflash. It also implies that fw_cfg_find() will succeed.
  95     */
  96    bool firmware_loaded;
  97
  98    /* Address at which board specific loader/setup code exists. If enabled,
  99     * this code-blob will run before anything else. It must return to the
 100     * caller via the link register. There is no stack set up. Enabled by
 101     * defining write_board_setup, which is responsible for loading the blob
 102     * to the specified address.
 103     */
 104    hwaddr board_setup_addr;
 105    void (*write_board_setup)(ARMCPU *cpu,
 106                              const struct arm_boot_info *info);
 107
 108    /* If set, the board specific loader/setup blob will be run from secure
 109     * mode, regardless of secure_boot. The blob becomes responsible for
 110     * changing to non-secure state if implementing a non-secure boot
 111     */
 112    bool secure_board_setup;
 113
 114    arm_endianness endianness;
 115};
 116
 117/**
 118 * arm_load_kernel - Loads memory with everything needed to boot
 119 *
 120 * @cpu: handle to the first CPU object
 121 * @info: handle to the boot info struct
 122 * Registers a machine init done notifier that copies to memory
 123 * everything needed to boot, depending on machine and user options:
 124 * kernel image, boot loaders, initrd, dtb. Also registers the CPU
 125 * reset handler.
 126 *
 127 * In case the machine file supports the platform bus device and its
 128 * dynamically instantiable sysbus devices, this function must be called
 129 * before sysbus-fdt arm_register_platform_bus_fdt_creator. Indeed the
 130 * machine init done notifiers are called in registration reverse order.
 131 */
 132void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info);
 133
 134/* Write a secure board setup routine with a dummy handler for SMCs */
 135void arm_write_secure_board_setup_dummy_smc(ARMCPU *cpu,
 136                                            const struct arm_boot_info *info,
 137                                            hwaddr mvbar_addr);
 138
 139/* Multiplication factor to convert from system clock ticks to qemu timer
 140   ticks.  */
 141extern int system_clock_scale;
 142
 143#endif /* HW_ARM_H */
 144