diff options
Diffstat (limited to 'sim/erc32/erc32.c')
| -rw-r--r-- | sim/erc32/erc32.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sim/erc32/erc32.c b/sim/erc32/erc32.c index 4d4177e..428d6c4 100644 --- a/sim/erc32/erc32.c +++ b/sim/erc32/erc32.c @@ -743,6 +743,14 @@ mec_read(addr, asi, data) *data = read_uart(addr); break; + case 0xF4: /* simulator RAM size in bytes */ + *data = 4096*1024; + break; + + case 0xF8: /* simulator ROM size in bytes */ + *data = 1024*1024; + break; + default: set_sfsr(MEC_ACC, addr, asi, 1); return (1); @@ -1887,3 +1895,19 @@ sis_memory_read(addr, data, length) memcpy(data, mem, length); return (length); } + +extern struct pstate sregs; + +void +boot_init (void) +{ + mec_write(MEC_WCR, 0); /* zero waitstates */ + mec_write(MEC_TRAPD, 0); /* turn off watch-dog */ + mec_write(MEC_RTC_SCALER, sregs.freq - 1); /* generate 1 MHz RTC tick */ + mec_write(MEC_MEMCFG, (3 << 18) | (4 << 10)); /* 1 MB ROM, 4 MB RAM */ + sregs.wim = 2; + sregs.psr = 0x110010e0; + sregs.r[30] = RAM_END; + sregs.r[14] = sregs.r[30] - 96 * 4; + mec_mcr |= 1; /* power-down enabled */ +} |