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https://github.com/xemu-project/xemu.git
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4a1418e07b
kqemu introduces a number of restrictions on the i386 target. The worst is that it prevents large memory from working in the default build. Furthermore, kqemu is fundamentally flawed in a number of ways. It relies on the TSC as a time source which will not be reliable on a multiple processor system in userspace. Since most modern processors are multicore, this severely limits the utility of kqemu. kvm is a viable alternative for people looking to accelerate qemu and has the benefit of being supported by the upstream Linux kernel. If someone can implement work arounds to remove the restrictions introduced by kqemu, I'm happy to avoid and/or revert this patch. N.B. kqemu will still function in the 0.11 series but this patch removes it from the 0.12 series. Paul, please Ack or Nack this patch. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
91 lines
3.6 KiB
C
91 lines
3.6 KiB
C
#ifndef CPU_COMMON_H
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#define CPU_COMMON_H 1
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/* CPU interfaces that are target indpendent. */
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#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
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#define WORDS_ALIGNED
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#endif
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#include "bswap.h"
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/* address in the RAM (different from a physical address) */
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typedef unsigned long ram_addr_t;
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/* memory API */
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typedef void CPUWriteMemoryFunc(void *opaque, target_phys_addr_t addr, uint32_t value);
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typedef uint32_t CPUReadMemoryFunc(void *opaque, target_phys_addr_t addr);
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void cpu_register_physical_memory_offset(target_phys_addr_t start_addr,
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ram_addr_t size,
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ram_addr_t phys_offset,
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ram_addr_t region_offset);
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static inline void cpu_register_physical_memory(target_phys_addr_t start_addr,
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ram_addr_t size,
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ram_addr_t phys_offset)
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{
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cpu_register_physical_memory_offset(start_addr, size, phys_offset, 0);
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}
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ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr);
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ram_addr_t qemu_ram_alloc(ram_addr_t);
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void qemu_ram_free(ram_addr_t addr);
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/* This should only be used for ram local to a device. */
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void *qemu_get_ram_ptr(ram_addr_t addr);
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/* This should not be used by devices. */
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ram_addr_t qemu_ram_addr_from_host(void *ptr);
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int cpu_register_io_memory(CPUReadMemoryFunc **mem_read,
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CPUWriteMemoryFunc **mem_write,
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void *opaque);
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void cpu_unregister_io_memory(int table_address);
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void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
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int len, int is_write);
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static inline void cpu_physical_memory_read(target_phys_addr_t addr,
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uint8_t *buf, int len)
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{
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cpu_physical_memory_rw(addr, buf, len, 0);
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}
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static inline void cpu_physical_memory_write(target_phys_addr_t addr,
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const uint8_t *buf, int len)
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{
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cpu_physical_memory_rw(addr, (uint8_t *)buf, len, 1);
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}
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void *cpu_physical_memory_map(target_phys_addr_t addr,
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target_phys_addr_t *plen,
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int is_write);
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void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len,
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int is_write, target_phys_addr_t access_len);
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void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque));
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void cpu_unregister_map_client(void *cookie);
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uint32_t ldub_phys(target_phys_addr_t addr);
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uint32_t lduw_phys(target_phys_addr_t addr);
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uint32_t ldl_phys(target_phys_addr_t addr);
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uint64_t ldq_phys(target_phys_addr_t addr);
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void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val);
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void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val);
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void stb_phys(target_phys_addr_t addr, uint32_t val);
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void stw_phys(target_phys_addr_t addr, uint32_t val);
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void stl_phys(target_phys_addr_t addr, uint32_t val);
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void stq_phys(target_phys_addr_t addr, uint64_t val);
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void cpu_physical_memory_write_rom(target_phys_addr_t addr,
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const uint8_t *buf, int len);
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#define IO_MEM_SHIFT 3
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#define IO_MEM_RAM (0 << IO_MEM_SHIFT) /* hardcoded offset */
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#define IO_MEM_ROM (1 << IO_MEM_SHIFT) /* hardcoded offset */
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#define IO_MEM_UNASSIGNED (2 << IO_MEM_SHIFT)
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#define IO_MEM_NOTDIRTY (3 << IO_MEM_SHIFT)
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/* Acts like a ROM when read and like a device when written. */
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#define IO_MEM_ROMD (1)
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#define IO_MEM_SUBPAGE (2)
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#define IO_MEM_SUBWIDTH (4)
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#endif /* !CPU_COMMON_H */
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