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cpu-defs: Move out TB_JMP defines

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These are not Architecture specific in any way so move them out of
cpu-defs.h. tb-hash.h is an appropriate place as a leading user and
their strong relationship to TB hashing and caching.

Backports commit 41da4bd6420afd1209c408974920f63ff9c658e1 from qemu
This commit is contained in:
Peter Crosthwaite 2018-02-14 08:13:58 -05:00 committed by Lioncash
parent 09d23c6604
commit 82a22d8f3a
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 8 additions and 8 deletions
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8
qemu/include/exec/cpu-defs.h
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@ -56,14 +56,6 @@ typedef uint64_t target_ulong;
#error TARGET_LONG_SIZE undefined
#endif
/* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
addresses on the same page. The top bits are the same. This allows
TLB invalidation to quickly clear a subset of the hash table. */
#define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
#define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
#define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
#define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
#if !defined(CONFIG_USER_ONLY)
/* use a fully associative victim tlb of 8 entries */
#define CPU_VTLB_SIZE 8

8
qemu/include/exec/tb-hash.h
View file

@ -20,6 +20,14 @@
#ifndef EXEC_TB_HASH
#define EXEC_TB_HASH
/* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
addresses on the same page. The top bits are the same. This allows
TLB invalidation to quickly clear a subset of the hash table. */
#define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
#define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
#define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
#define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc)
{
target_ulong tmp;