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
  19 typedef 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 */
  27 DeviceState *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  */
  34 typedef struct {
  35     Notifier notifier; /* actual notifier */
  36     ARMCPU *cpu; /* handle to the first cpu object */
  37 } ArmLoadKernelNotifier;
  38
  39 /* arm_boot.c */
  40 struct 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  */
 132 void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info);
 133
 134 /* Write a secure board setup routine with a dummy handler for SMCs */
 135 void 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.  */
 141 extern int system_clock_scale;
 142
 143 #endif /* HW_ARM_H */