diff options
Diffstat (limited to 'target/m68k/cpu.h')
| -rw-r--r-- | target/m68k/cpu.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/target/m68k/cpu.h b/target/m68k/cpu.h index 5d2cb012e5..7c3feeaf8a 100644 --- a/target/m68k/cpu.h +++ b/target/m68k/cpu.h @@ -85,7 +85,13 @@ typedef struct CPUM68KState { uint32_t pc; uint32_t sr; - /* SSP and USP. The current_sp is stored in aregs[7], the other here. */ + /* + * The 68020/30/40 support two supervisor stacks, ISP and MSP. + * The 68000/10, Coldfire, and CPU32 only have USP/SSP. + * + * The current_sp is stored in aregs[7], the other here. + * The USP, SSP, and if used the additional ISP for 68020/30/40. + */ int current_sp; uint32_t sp[3]; @@ -484,6 +490,7 @@ enum m68k_features { M68K_FEATURE_CF_EMAC, M68K_FEATURE_CF_EMAC_B, /* Revision B EMAC (dual accumulate). */ M68K_FEATURE_USP, /* User Stack Pointer. (680[012346]0, ISA A+, B or C).*/ + M68K_FEATURE_MSP, /* Master Stack Pointer. (680[234]0) */ M68K_FEATURE_EXT_FULL, /* 68020+ full extension word. */ M68K_FEATURE_WORD_INDEX, /* word sized address index registers. */ M68K_FEATURE_SCALED_INDEX, /* scaled address index registers. */ |