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target/sh4: trap unaligned accesses

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SH4 requires that memory accesses are naturally aligned, except for the
SH4-A movua.l instructions which can do unaligned loads.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2017-05-01 23:20:43 +02:00
parent 143021b26f
commit 34257c2117
4 changed files with 25 additions and 2 deletions
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4
target/sh4/cpu.h
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@ -24,6 +24,7 @@
#include "cpu-qom.h"
#define TARGET_LONG_BITS 32
#define ALIGNED_ONLY
/* CPU Subtypes */
#define SH_CPU_SH7750 (1 << 0)
@ -215,6 +216,9 @@ void superh_cpu_dump_state(CPUState *cpu, FILE *f,
hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int superh_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
void sh4_translate_init(void);
SuperHCPU *cpu_sh4_init(const char *cpu_model);