diff options
Diffstat (limited to 'include/exec/cpu-defs.h')
| -rw-r--r-- | include/exec/cpu-defs.h | 107 |
1 files changed, 70 insertions, 37 deletions
diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h index 8f2a848bf5..9bc713a70b 100644 --- a/include/exec/cpu-defs.h +++ b/include/exec/cpu-defs.h @@ -33,9 +33,30 @@ #include "exec/hwaddr.h" #endif #include "exec/memattrs.h" +#include "qom/cpu.h" + +#include "cpu-param.h" #ifndef TARGET_LONG_BITS -#error TARGET_LONG_BITS must be defined before including this header +# error TARGET_LONG_BITS must be defined in cpu-param.h +#endif +#ifndef NB_MMU_MODES +# error NB_MMU_MODES must be defined in cpu-param.h +#endif +#ifndef TARGET_PHYS_ADDR_SPACE_BITS +# error TARGET_PHYS_ADDR_SPACE_BITS must be defined in cpu-param.h +#endif +#ifndef TARGET_VIRT_ADDR_SPACE_BITS +# error TARGET_VIRT_ADDR_SPACE_BITS must be defined in cpu-param.h +#endif +#ifndef TARGET_PAGE_BITS +# ifdef TARGET_PAGE_BITS_VARY +# ifndef TARGET_PAGE_BITS_MIN +# error TARGET_PAGE_BITS_MIN must be defined in cpu-param.h +# endif +# else +# error TARGET_PAGE_BITS must be defined in cpu-param.h +# endif #endif #define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8) @@ -58,6 +79,7 @@ typedef uint64_t target_ulong; #endif #if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG) + /* use a fully associative victim tlb of 8 entries */ #define CPU_VTLB_SIZE 8 @@ -127,18 +149,10 @@ typedef struct CPUIOTLBEntry { MemTxAttrs attrs; } CPUIOTLBEntry; -/** - * struct CPUTLBWindow - * @begin_ns: host time (in ns) at the beginning of the time window - * @max_entries: maximum number of entries observed in the window - * - * See also: tlb_mmu_resize_locked() +/* + * Data elements that are per MMU mode, minus the bits accessed by + * the TCG fast path. */ -typedef struct CPUTLBWindow { - int64_t begin_ns; - size_t max_entries; -} CPUTLBWindow; - typedef struct CPUTLBDesc { /* * Describe a region covering all of the large pages allocated @@ -148,17 +162,36 @@ typedef struct CPUTLBDesc { */ target_ulong large_page_addr; target_ulong large_page_mask; + /* host time (in ns) at the beginning of the time window */ + int64_t window_begin_ns; + /* maximum number of entries observed in the window */ + size_t window_max_entries; + size_t n_used_entries; /* The next index to use in the tlb victim table. */ size_t vindex; - CPUTLBWindow window; - size_t n_used_entries; + /* The tlb victim table, in two parts. */ + CPUTLBEntry vtable[CPU_VTLB_SIZE]; + CPUIOTLBEntry viotlb[CPU_VTLB_SIZE]; + /* The iotlb. */ + CPUIOTLBEntry *iotlb; } CPUTLBDesc; /* + * Data elements that are per MMU mode, accessed by the fast path. + * The structure is aligned to aid loading the pair with one insn. + */ +typedef struct CPUTLBDescFast { + /* Contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */ + uintptr_t mask; + /* The array of tlb entries itself. */ + CPUTLBEntry *table; +} CPUTLBDescFast QEMU_ALIGNED(2 * sizeof(void *)); + +/* * Data elements that are shared between all MMU modes. */ typedef struct CPUTLBCommon { - /* Serialize updates to tlb_table and tlb_v_table, and others as noted. */ + /* Serialize updates to f.table and d.vtable, and others as noted. */ QemuSpin lock; /* * Within dirty, for each bit N, modifications have been made to @@ -176,35 +209,35 @@ typedef struct CPUTLBCommon { size_t elide_flush_count; } CPUTLBCommon; -# define CPU_TLB \ - /* tlb_mask[i] contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */ \ - uintptr_t tlb_mask[NB_MMU_MODES]; \ - CPUTLBEntry *tlb_table[NB_MMU_MODES]; -# define CPU_IOTLB \ - CPUIOTLBEntry *iotlb[NB_MMU_MODES]; - /* + * The entire softmmu tlb, for all MMU modes. * The meaning of each of the MMU modes is defined in the target code. - * Note that NB_MMU_MODES is not yet defined; we can only reference it - * within preprocessor defines that will be expanded later. + * Since this is placed within CPUNegativeOffsetState, the smallest + * negative offsets are at the end of the struct. */ -#define CPU_COMMON_TLB \ - CPUTLBCommon tlb_c; \ - CPUTLBDesc tlb_d[NB_MMU_MODES]; \ - CPU_TLB \ - CPUTLBEntry tlb_v_table[NB_MMU_MODES][CPU_VTLB_SIZE]; \ - CPU_IOTLB \ - CPUIOTLBEntry iotlb_v[NB_MMU_MODES][CPU_VTLB_SIZE]; +typedef struct CPUTLB { + CPUTLBCommon c; + CPUTLBDesc d[NB_MMU_MODES]; + CPUTLBDescFast f[NB_MMU_MODES]; +} CPUTLB; -#else +/* This will be used by TCG backends to compute offsets. */ +#define TLB_MASK_TABLE_OFS(IDX) \ + ((int)offsetof(ArchCPU, neg.tlb.f[IDX]) - (int)offsetof(ArchCPU, env)) -#define CPU_COMMON_TLB +#else -#endif +typedef struct CPUTLB { } CPUTLB; +#endif /* !CONFIG_USER_ONLY && CONFIG_TCG */ -#define CPU_COMMON \ - /* soft mmu support */ \ - CPU_COMMON_TLB \ +/* + * This structure must be placed in ArchCPU immedately + * before CPUArchState, as a field named "neg". + */ +typedef struct CPUNegativeOffsetState { + CPUTLB tlb; + IcountDecr icount_decr; +} CPUNegativeOffsetState; #endif |