mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-10-20 20:48:25 +02:00
db8b0a82b1
Support target CPUs having a page size which isn't knownn at compile time. To use this, the CPU implementation should: * define TARGET_PAGE_BITS_VARY * not define TARGET_PAGE_BITS * define TARGET_PAGE_BITS_MIN to the smallest value it might possibly want for TARGET_PAGE_BITS * call set_preferred_target_page_bits() in its realize function to indicate the actual preferred target page size for the CPU (and report any error from it) In CONFIG_USER_ONLY, the CPU implementation should continue to define TARGET_PAGE_BITS appropriately for the guest OS page size. Machines which want to take advantage of having the page size something larger than TARGET_PAGE_BITS_MIN must set the MachineClass minimum_page_bits field to a value which they guarantee will be no greater than the preferred page size for any CPU they create. Note that changing the target page size by setting minimum_page_bits is a migration compatibility break for that machine. For debugging purposes, attempts to use TARGET_PAGE_SIZE before it has been finally confirmed will assert. Backports commit 20bccb82ff3ea09bcb7c4ee226d3160cab15f7da from qemu
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/* Declarations for use by board files for creating devices. */
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#ifndef HW_BOARDS_H
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#define HW_BOARDS_H
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#include "qemu/typedefs.h"
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#include "sysemu/accel.h"
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#include "hw/qdev.h"
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#include "qom/object.h"
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#include "qom/cpu.h"
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#include "uc_priv.h"
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typedef int QEMUMachineInitFunc(struct uc_struct *uc, MachineState *ms);
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typedef void QEMUMachineResetFunc(void);
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struct QEMUMachine {
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const char *family; /* NULL iff @name identifies a standalone machtype */
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const char *name;
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QEMUMachineInitFunc *init;
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QEMUMachineResetFunc *reset;
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int max_cpus;
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int is_default;
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int arch;
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int minimum_page_bits;
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};
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void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
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const char *name,
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uint64_t ram_size);
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void qemu_register_machine(struct uc_struct *uc, QEMUMachine *m, const char *type_machine,
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void (*init)(struct uc_struct *uc, ObjectClass *oc, void *data));
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#define TYPE_MACHINE_SUFFIX "-machine"
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#define TYPE_MACHINE "machine"
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#undef MACHINE /* BSD defines it and QEMU does not use it */
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#define MACHINE(uc, obj) \
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OBJECT_CHECK(uc, MachineState, (obj), TYPE_MACHINE)
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#define MACHINE_GET_CLASS(uc, obj) \
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OBJECT_GET_CLASS(uc, MachineClass, (obj), TYPE_MACHINE)
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#define MACHINE_CLASS(uc, klass) \
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OBJECT_CLASS_CHECK(uc, MachineClass, (klass), TYPE_MACHINE)
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MachineClass *find_default_machine(struct uc_struct *uc, int arch);
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/**
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* MachineClass:
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* @qemu_machine: #QEMUMachine
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* @minimum_page_bits:
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* If non-zero, the board promises never to create a CPU with a page size
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* smaller than this, so QEMU can use a more efficient larger page
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* size than the target architecture's minimum. (Attempting to create
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* such a CPU will fail.) Note that changing this is a migration
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* compatibility break for the machine.
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*/
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struct MachineClass {
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/*< private >*/
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ObjectClass parent_class;
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/*< public >*/
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const char *family; /* NULL iff @name identifies a standalone machtype */
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const char *name;
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int (*init)(struct uc_struct *uc, MachineState *state);
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void (*reset)(void);
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int max_cpus;
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int is_default;
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int arch;
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int minimum_page_bits;
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};
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/**
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* MachineState:
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*/
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struct MachineState {
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/*< private >*/
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Object parent_obj;
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/*< public >*/
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ram_addr_t ram_size;
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ram_addr_t maxram_size;
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const char *cpu_model;
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struct uc_struct *uc;
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AccelState *accelerator;
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};
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void machine_register_types(struct uc_struct *uc);
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#endif
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