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target-s390x: function to adjust the length wrt page boundary
This patch adds a function to adjust the length of a transfer so that it doesn't cross a page boundary in softmmu mode. It does nothing in user mode. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -54,6 +54,17 @@ void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
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#define HELPER_LOG(x...)
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#endif
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/* Reduce the length so that addr + len doesn't cross a page boundary. */
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static inline uint64_t adj_len_to_page(uint64_t len, uint64_t addr)
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{
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#ifndef CONFIG_USER_ONLY
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if ((addr & ~TARGET_PAGE_MASK) + len - 1 >= TARGET_PAGE_SIZE) {
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return -addr & ~TARGET_PAGE_MASK;
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}
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#endif
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return len;
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}
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#ifndef CONFIG_USER_ONLY
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static void mvc_fast_memset(CPUS390XState *env, uint32_t l, uint64_t dest,
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uint8_t byte)
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