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| author | Peter Maydell <peter.maydell@linaro.org> | 2015-01-20 15:19:35 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-01-20 15:19:35 +0000 |
| commit | db5fd8d709fd57f4d4f11edfca9f421f657f4508 (patch) | |
| tree | 88c0e4238d481b2ebaf1cfa31f5db245cb4bd988 /include/exec | |
| parent | 82f11917c99e3c7fa3d6aa98572ecc98c7324c2f (diff) | |
| download | qemu-db5fd8d709fd57f4d4f11edfca9f421f657f4508.zip qemu-db5fd8d709fd57f4d4f11edfca9f421f657f4508.tar.gz qemu-db5fd8d709fd57f4d4f11edfca9f421f657f4508.tar.bz2 | |
cpu_ldst.h, cpu-all.h, bswap.h: Update documentation on ld/st accessors
Add documentation of what the cpu_*_* accessors look like.
Correct some minor errors in the existing documentation of the
direct _p accessor family. Remove the near-duplicate comment
on the _p accessors from cpu-all.h and replace it with a reference
to the comment in bswap.h.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1421334118-3287-16-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/cpu-all.h | 38 | ||||
| -rw-r--r-- | include/exec/cpu_ldst.h | 21 |
2 files changed, 22 insertions, 37 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 5fdd2fe..2c48286 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -115,43 +115,9 @@ static inline void tswap64s(uint64_t *s) #define bswaptls(s) bswap64s(s) #endif -/* CPU memory access without any memory or io remapping */ - -/* - * the generic syntax for the memory accesses is: - * - * load: ld{type}{sign}{size}{endian}_{access_type}(ptr) - * - * store: st{type}{size}{endian}_{access_type}(ptr, val) - * - * type is: - * (empty): integer access - * f : float access - * - * sign is: - * (empty): for floats or 32 bit size - * u : unsigned - * s : signed - * - * size is: - * b: 8 bits - * w: 16 bits - * l: 32 bits - * q: 64 bits - * - * endian is: - * (empty): target cpu endianness or 8 bit access - * r : reversed target cpu endianness (not implemented yet) - * be : big endian (not implemented yet) - * le : little endian (not implemented yet) - * - * access_type is: - * raw : host memory access - * user : user mode access using soft MMU - * kernel : kernel mode access using soft MMU +/* Target-endianness CPU memory access functions. These fit into the + * {ld,st}{type}{sign}{size}{endian}_p naming scheme described in bswap.h. */ - -/* target-endianness CPU memory access functions */ #if defined(TARGET_WORDS_BIGENDIAN) #define lduw_p(p) lduw_be_p(p) #define ldsw_p(p) ldsw_be_p(p) diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h index 16f4e30..d98ff17 100644 --- a/include/exec/cpu_ldst.h +++ b/include/exec/cpu_ldst.h @@ -23,7 +23,26 @@ * * Used by target op helpers. * - * MMU mode suffixes are defined in target cpu.h. + * The syntax for the accessors is: + * + * load: cpu_ld{sign}{size}_{mmusuffix}(env, ptr) + * + * store: cpu_st{sign}{size}_{mmusuffix}(env, ptr, val) + * + * sign is: + * (empty): for 32 and 64 bit sizes + * u : unsigned + * s : signed + * + * size is: + * b: 8 bits + * w: 16 bits + * l: 32 bits + * q: 64 bits + * + * mmusuffix is one of the generic suffixes "data" or "code", or + * (for softmmu configs) a target-specific MMU mode suffix as defined + * in target cpu.h. */ #ifndef CPU_LDST_H #define CPU_LDST_H |