diff options
Diffstat (limited to 'hw/m48t59.c')
| -rw-r--r-- | hw/m48t59.c | 51 |
1 files changed, 38 insertions, 13 deletions
diff --git a/hw/m48t59.c b/hw/m48t59.c index 6c54c9e6ab..45c05a0ed4 100644 --- a/hw/m48t59.c +++ b/hw/m48t59.c @@ -36,13 +36,13 @@ #endif /* - * The M48T08 and M48T59 chips are very similar. The newer '59 has + * The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has * alarm and a watchdog timer and related control registers. In the * PPC platform there is also a nvram lock function. */ struct m48t59_t { /* Model parameters */ - int type; // 8 = m48t08, 59 = m48t59 + int type; // 2 = m48t02, 8 = m48t08, 59 = m48t59 /* Hardware parameters */ qemu_irq IRQ; int mem_index; @@ -210,9 +210,14 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) if (addr > 0x1FF8 && addr < 0x2000) NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val); - if (NVRAM->type == 8 && - (addr >= 0x1ff0 && addr <= 0x1ff7)) + + /* check for NVRAM access */ + if ((NVRAM->type == 2 && addr < 0x7f8) || + (NVRAM->type == 8 && addr < 0x1ff8) || + (NVRAM->type == 59 && addr < 0x1ff0)) goto do_write; + + /* TOD access */ switch (addr) { case 0x1FF0: /* flags register : read-only */ @@ -270,10 +275,12 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) set_up_watchdog(NVRAM, val); break; case 0x1FF8: + case 0x07F8: /* control */ - NVRAM->buffer[0x1FF8] = (val & ~0xA0) | 0x90; + NVRAM->buffer[addr] = (val & ~0xA0) | 0x90; break; case 0x1FF9: + case 0x07F9: /* seconds (BCD) */ tmp = fromBCD(val & 0x7F); if (tmp >= 0 && tmp <= 59) { @@ -281,7 +288,7 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) tm.tm_sec = tmp; set_time(NVRAM, &tm); } - if ((val & 0x80) ^ (NVRAM->buffer[0x1FF9] & 0x80)) { + if ((val & 0x80) ^ (NVRAM->buffer[addr] & 0x80)) { if (val & 0x80) { NVRAM->stop_time = time(NULL); } else { @@ -289,9 +296,10 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) NVRAM->stop_time = 0; } } - NVRAM->buffer[0x1FF9] = val & 0x80; + NVRAM->buffer[addr] = val & 0x80; break; case 0x1FFA: + case 0x07FA: /* minutes (BCD) */ tmp = fromBCD(val & 0x7F); if (tmp >= 0 && tmp <= 59) { @@ -301,6 +309,7 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) } break; case 0x1FFB: + case 0x07FB: /* hours (BCD) */ tmp = fromBCD(val & 0x3F); if (tmp >= 0 && tmp <= 23) { @@ -310,14 +319,16 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) } break; case 0x1FFC: + case 0x07FC: /* day of the week / century */ tmp = fromBCD(val & 0x07); get_time(NVRAM, &tm); tm.tm_wday = tmp; set_time(NVRAM, &tm); - NVRAM->buffer[0x1FFC] = val & 0x40; + NVRAM->buffer[addr] = val & 0x40; break; case 0x1FFD: + case 0x07FD: /* date */ tmp = fromBCD(val & 0x1F); if (tmp != 0) { @@ -327,6 +338,7 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) } break; case 0x1FFE: + case 0x07FE: /* month */ tmp = fromBCD(val & 0x1F); if (tmp >= 1 && tmp <= 12) { @@ -336,6 +348,7 @@ void m48t59_write (void *opaque, uint32_t addr, uint32_t val) } break; case 0x1FFF: + case 0x07FF: /* year */ tmp = fromBCD(val); if (tmp >= 0 && tmp <= 99) { @@ -367,9 +380,13 @@ uint32_t m48t59_read (void *opaque, uint32_t addr) struct tm tm; uint32_t retval = 0xFF; - if (NVRAM->type == 8 && - (addr >= 0x1ff0 && addr <= 0x1ff7)) + /* check for NVRAM access */ + if ((NVRAM->type == 2 && addr < 0x078f) || + (NVRAM->type == 8 && addr < 0x1ff8) || + (NVRAM->type == 59 && addr < 0x1ff0)) goto do_read; + + /* TOD access */ switch (addr) { case 0x1FF0: /* flags register */ @@ -398,39 +415,47 @@ uint32_t m48t59_read (void *opaque, uint32_t addr) set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]); goto do_read; case 0x1FF8: + case 0x07F8: /* control */ goto do_read; case 0x1FF9: + case 0x07F9: /* seconds (BCD) */ get_time(NVRAM, &tm); - retval = (NVRAM->buffer[0x1FF9] & 0x80) | toBCD(tm.tm_sec); + retval = (NVRAM->buffer[addr] & 0x80) | toBCD(tm.tm_sec); break; case 0x1FFA: + case 0x07FA: /* minutes (BCD) */ get_time(NVRAM, &tm); retval = toBCD(tm.tm_min); break; case 0x1FFB: + case 0x07FB: /* hours (BCD) */ get_time(NVRAM, &tm); retval = toBCD(tm.tm_hour); break; case 0x1FFC: + case 0x07FC: /* day of the week / century */ get_time(NVRAM, &tm); - retval = NVRAM->buffer[0x1FFC] | tm.tm_wday; + retval = NVRAM->buffer[addr] | tm.tm_wday; break; case 0x1FFD: + case 0x07FD: /* date */ get_time(NVRAM, &tm); retval = toBCD(tm.tm_mday); break; case 0x1FFE: + case 0x07FE: /* month */ get_time(NVRAM, &tm); retval = toBCD(tm.tm_mon + 1); break; case 0x1FFF: + case 0x07FF: /* year */ get_time(NVRAM, &tm); if (NVRAM->type == 8) @@ -650,7 +675,7 @@ m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base, } if (mem_base != 0) { s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s); - cpu_register_physical_memory(mem_base, 0x4000, s->mem_index); + cpu_register_physical_memory(mem_base, size, s->mem_index); } if (type == 59) { s->alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, s); |