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cpu_ldst.h: Allow NB_MMU_MODES to be 7 

Support guest CPUs which need 7 MMU index values.
Add a comment about what would be required to raise the limit
further (trivial for 8, TCG backend rework for 9 or more).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Peter Maydell 2015-02-05 13:37:23 +00:00
parent 587078f0ed
commit 8f3ae2ae2d
1 changed files with 25 additions and 3 deletions
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28
include/exec/cpu_ldst.h
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@ -244,9 +244,31 @@ uint64_t helper_ldq_cmmu(CPUArchState *env, target_ulong addr, int mmu_idx);
#undef MEMSUFFIX
#endif /* (NB_MMU_MODES >= 6) */
#if (NB_MMU_MODES > 6)
#error "NB_MMU_MODES > 6 is not supported for now"
#endif /* (NB_MMU_MODES > 6) */
#if (NB_MMU_MODES >= 7) && defined(MMU_MODE6_SUFFIX)
#define CPU_MMU_INDEX 6
#define MEMSUFFIX MMU_MODE6_SUFFIX
#define DATA_SIZE 1
#include "exec/cpu_ldst_template.h"
#define DATA_SIZE 2
#include "exec/cpu_ldst_template.h"
#define DATA_SIZE 4
#include "exec/cpu_ldst_template.h"
#define DATA_SIZE 8
#include "exec/cpu_ldst_template.h"
#undef CPU_MMU_INDEX
#undef MEMSUFFIX
#endif /* (NB_MMU_MODES >= 7) */
#if (NB_MMU_MODES > 7)
/* Note that supporting NB_MMU_MODES == 9 would require
* changes to at least the ARM TCG backend.
*/
#error "NB_MMU_MODES > 7 is not supported for now"
#endif /* (NB_MMU_MODES > 7) */
/* these access are slower, they must be as rare as possible */
#define CPU_MMU_INDEX (cpu_mmu_index(env))